JP2003294663A - Method for measuring conductivity - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate an adjustment for obtaining an appropriate conductivity value. <P>SOLUTION: In a conductivity measurement apparatus 150, a voltage in response to an impedance value of a developer measured by a pair of electrodes 112 provided in a conductivity sensor 110 is read as a measurement value (v) and outputted from an A/D converter 154 to a controller 156. The controller 156 calculates the conductivity value based on an output value inputted from the A/D converter and a preset operational expression. The appropriate conductivity value can be obtained by setting a correction condition of the operational expression by measuring a known conductivity of the developer, and calculating by using the operational expression based on the set correction condition. <P>COPYRIGHT: (C)2004,JPO

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention
Of measuring conductivity when measuring the conductivity of a developer, etc.
About. [0002] 2. Description of the Related Art In photosensitive material processing equipment, as photosensitive material,
Photosensitive lithographic stamp with a photosensitive layer on a support such as aluminum
A printing plate that develops a printing plate (hereinafter referred to as “PS plate”)
And an image device (hereinafter referred to as “PS processor”).
In this PS plate processor, the PS plate is immersed in a developer.
Development process to be processed, front and back of PS plate after development process
Water washing process, water washing treatment by spraying water with water
Applying desensitizing solution such as gum solution to the front and back surfaces of finished PS plate
The desensitization process to perform the desensitization process
Is provided. In such a PS plate processor, a developing tank is used.
Do not immerse the PS plate in this developer solution.
It is not necessary due to image exposure.
The photosensitive layer is removed from the surface of the PS plate. At this time, the PS plate processor uses a developer.
The conductivity of the developer is measured based on the measurement results.
The PS plate can be properly processed while keeping the degree within a predetermined range.
There is something to do. By the way, the conductivity is measured by a conductivity sensor.
Immerse the pair of electrodes provided in the
Output from an electric circuit that outputs a voltage according to the impedance value
The read voltage is read to the controller via the A / D converter.
To calculate the output value after A / D conversion.
More implemented. In addition, the conductivity of the developer varies depending on the temperature.
In addition to a pair of electrodes, the conductivity sensor
Some thermistors are provided, so that
The thermistor detects the conductivity measured using the other electrodes.
So that it can be corrected to 25 ° C based on the temperature
Yes. In general, the conductivity is 25 ° C.
Used. On the other hand, it is used for the measurement of such conductivity.
There are individual differences in electrical conductivity sensors and electrical measurement circuits.
Yes, for this, it is necessary to adjust the conductivity measuring device in advance
There is. The conductivity measuring device is adjusted in advance by the conductivity.
Measure the conductivity of the reference solution for which the
Variables built into the measurement circuit to minimize errors
This is done by operating a resistor (VR) or the like. [0009] However, this is not the case.
For such adjustment, the measured value is displayed on the display means such as a liquid crystal panel.
Based on this display, the VR is operated and the reference solution
Measure conductivity and confirm error, measure conductivity of reference solution
It must be repeated until the value error is within the specified range,
It is an extremely complicated task requiring skill. The present invention has been made in view of the above facts.
Yes, easy adjustment work and accurate measurement of conductivity
The purpose is to propose a method for measuring the electrical conductivity. [0011] [Means for Solving the Problems] To solve the above problems
The present invention includes a pair of electrodes immersed in a liquid to be measured,
Depending on the conductivity of the liquid measured using a pair of electrodes
An electrical circuit that outputs a voltage and the electrical circuit outputs
A / D conversion means for A / D converting and outputting the voltage value
Liquid temperature measuring means for measuring the liquid temperature of the liquid to be measured,
The output value of the A / D conversion means and the liquid temperature measuring means
Calculate the conductivity value of the liquid to be measured based on the measured liquid temperature
A method of measuring conductivity using a computing means, comprising:
A constant determined from the characteristics of the pair of electrodes and the characteristics of the electric circuit.
A constant determined from the characteristics and the electric conductivity of the liquid to be measured.
Constants and constants specific to the temperature of the liquid to be measured
Based on the output value of the A / D conversion means
In addition to setting up an equation to calculate the conductivity value,
Output value of A / D conversion means of known liquid to be measured or said A / D
Impedance obtained by calculating from the output value of the conversion means
Set correction conditions based on either value or conductivity
The calculation means measures the electrical conductivity of the liquid to be measured.
Output value of the A / D conversion means, the arithmetic expression and
A conductivity value is calculated based on the correction condition.
And According to the present invention, the constant inherent to the liquid to be measured
And the characteristics of the electric circuit including a pair of electrodes that are measuring means
A constant to be determined and A / D for the measured value
Set an arithmetic expression based on the output characteristics of the conversion means,
Further, the calculation means converts the output value of the A / D conversion means to the conductivity value.
Is converted based on this arithmetic expression. Here, a liquid to be measured whose conductivity is known is used.
The conductivity value calculated by the calculation means when making adjustments
Is adjusted so that the conductivity of the measured liquid is known.
Set the conditions and actually measure the conductivity value of the liquid to be measured.
When calculating, use the calculation formula based on the correction conditions.
The As a result, a suitable conductivity value can be obtained by simple adjustment.
Can be obtained. In general, when the conductivity of the liquid to be measured is measured
The electrical conductivity value Lr (mS / cm) of the A / D conversion means
From the force value Y (digdt) and the temperature Td (° C) of the liquid to be measured, Lr = f (Y, Td) Can be obtained as At this time, for example, the conductivity L₀(MS / c
m) Conductivity measurement for a known liquid to be measured
The conductivity value of is the conductivity value L_S(MS / cm)
The correction amount H is set to H = L₀-L_SFor example, measured liquid
Specific constant F for the conductivity of₁Of correction method to correct
The constant F corrected based on the correction amount H.₁The
F ₁‘ Lr = f <F₁', Y, Td> However, F₁‘= G <H>, When the correction value H is H = 0, F₁'= G <0> = F₁Toss
Can. That is, a liquid to be measured whose conductivity is known is used.
After adjusting the constant F based on the measurement result₁Correct
An arithmetic expression to be set can be set. At this time,
Variables Rt and βt expressed below are set. [0018] Rt = (a + b · Y / c) · F₁’/ 100 βt = F₂・ Td + d However, F₁'= F₁+ <E · L₀+ M> ・ H ・ F₁/ F_S Where F_SIs the known conductivity L₀Specific constants of the liquid to be measured
F₁, Rt is an impedance between a pair of electrodes immersed in the liquid to be measured.
Impedance, βt is a temperature correction coefficient. By using these variables Rt and βt,
The conductivity value Lr <mS / cm> is Lr = 1 + J · 1000 / <Rt · βt> Where J is a cell constant (a constant determined from a pair of electrodes) and
Can be obtained. The meaning of this arithmetic expression is Conductivity = 1 / electric resistivity = cell constant / <impedance between electrodes
-Dance / temperature correction coefficient> It is. The unit of conductivity S / cm is 1 / (Ω · c
m), that is, the unit S is 1 / Ω, but the Lr
Since the unit is mS / cm, it is multiplied by 1000.
In addition, “1” in the calculation formula is the offset value required for calculation.
It is said. Also, the constant F₁For example, two types of measured
Even if the liquid has the same conductivity, the temperature of each measured liquid
Inherent constant F₂Is different, the temperature correction coefficient βt is also different.
Resulting in different conductivity values Lr
Therefore, impedance is another variable
Correct the value Rt to calculate the appropriate conductivity value Lr.
It is what you get. Next, the constant F₁Explain the meaning of
And the impedance value Rt is proportional to the output value Y <1
Next function>. Therefore, with this correction method, the
The relationship between the impedance value Rt and the output value Y is a linear function.
Mari, constant F₁′ Is a linear function of the correction value H, F₁′ = Α · H + γ It was. At this time, when the correction value H is H = 0, F₁’=
F₁Therefore, γ = F₁It is. In addition, the correction value H is the electric power of the liquid to be measured at the time of adjustment.
Conductivity value L₀Is known to change depending on
α is the conductivity value L₀Can be a function of Α = e · L₀・ M From here, constant F₁’ F₁'= F₁+ (E ・ L₀+ M) ・ H First, the correction value H is set to H = 0.
Known conductivity value L₀The electrical conductivity of the liquid to be measured was measured
Conductivity value Lr₀The difference (L₀-Lr₀)
In other words, correction value H₀Confirm. From these data, F_Ten'= F₁+ (E ・ L₀+ M) ・ H₀ = F₁+ (E ・ L₁+ M) ・ H₁ To obtain e and m. Furthermore, the characteristic of the liquid to be measured used at the time of adjustment
Constant F_SAnd the specific definition of the solution to be measured after correction
Number F₁Considering the case of different, this constant F₁Correction part of ’
Minute (e ・ L₀+ M) · H is the liquid to be measured used during adjustment
Intrinsic constant F_SSpecific constant F of the liquid to be measured₁Ratio of
The value depends on the rate. Therefore, the correction part (e · L₀+
m) ・ F in H₁/ F_SMultiplied by F₁'= F₁+ (E ・ L₀+ M) ・ H ・ F₁/ F_S It was. By the way, in the case of this correction method, the variable Rt
Is the constant F₁Cell constant J is compensated.
Correct, that is, if the corrected cell constant is J '
The J ’= J · s (H) It can also be. Also, for example, output by A / D conversion means
In the case of a correction method for correcting the output value Y, the correction amount H
Assuming that the output value Y corrected based on the output value Y ′, Lr = f (Y ′, Td) However, Y '= g (Y, H) When the correction value H is H = 0, Y ′ = h (Y, 0) =
Y It can be. In other words, measured object with known conductivity
After adjusting with liquid, output value based on measurement result
An arithmetic expression for correcting Y can be set. At this time, a variable Rt expressed as follows:
βt is set. [0031] Rt = (a + b · Y ′ / c) · F1 / 100 βt = F₂・ Td + d However, Y ′ = Y + (n + p · Y) · H ′ H ′ = H · r (L₀) r (L₀) = K · (Lx−L₀) + Q H = L₀-L_S Lx is the calculated standard conductivity, and variable Rt is immersed in the liquid to be measured
The impedance value between a pair of electrodes, the variable βt is the temperature
Correction coefficient. By using these variables Rt and βt,
The conductivity value Lr (mS / cm) is Lr = 1 + J · 1000 / (Rt · βt) However, J can be obtained as a cell constant. In this correction method, the corrected impedance is also used.
The relationship between the dance value Rt and the output value Y ′ is a linear function,
The output value Y ′ is a linear function of the correction value H, Y ′ = δ · H + ε It was. When the correction value H is H = 0, Y ′ = h (0) =
Since Y, ε = Y. Also, the complement at Y ′
Since delta Y 'changes with output value Y, δ is output.
A function of value Y, δ = (n · Y + p) From this, the output value Y ′ is Y ′ ’= (n · Y + p) · H It is said. The constants n and p are obtained by first calculating the correction value H.
Known conductivity L at a constant temperature, where H = 0₀Cover
Conductivity value Lr of measuring solution₀And the difference (L₀-L
r₀), That is, the correction value H₀Confirm. Next, L₀And Lr₀Output with output value Y
Value Y₀, Y₀'Is calculated. Similarly, the same type of liquid to be measured
Known conductivity L₁Conductivity value Lr of₁, L₁as well as
Lr₁Output value Y which is the output value Y of₁, Y₁'Is calculated. From these data, Y₀‘= Y₀+ (N · Y₀+ P) ・ H₀ Y₁'= Y₁+ (N · Y₁+ P) ・ H₀ Can determine n and p. Further, the correction value H is a value of the liquid to be measured at the time of adjustment.
Conductivity value L₀Knew that it would change
Therefore, the correction value H is changed to the conductivity value L₀Function, H ′ = H + r (L₀) r (L₀) = K · (Lx−L₀) + Q However, Lx is the calculated standard conductivity, and output from here
The value Y ' Y ′ = Y + (n · Y + p) · H ′ = Y + (n · Y + p) · H ′ · ((H + k · (Lx−L
₀) + Q) It was. The constants k and q are obtained by calculating the constants n and p.
Known conductivity L in the determined method₁Conductivity value Lr of₁
Is the difference (L₁-Lr₁), That is,
Correction value H₁Using, Hx = H₀+ (K · (Lx−L₀) + Q) Hx = H₁+ (K · (Lx−L₁) + Q) However, Hx is a calculational supplement for the calculated reference conductivity.
The constants k and q are obtained from positive values. Also, for example, the calculated conductivity value Lr is
In the case of a correction method for correction, correction is performed based on the correction amount H.
If the conductivity value Lr is Lr ′, Lr '= H + Lr However, Lr = f (Y, Td) Can be obtained as That is, Lr ′ = H + 1 + J · 1000 / (Rt · βt) Can be obtained as Similarly, Lr ′ = H ′ · Lr However, H '= t (H), Lr = f (Y, Td) That is, Lr ′ = H ′ · (1 + J · 1000 / (Rt · βt)) You can also get as Also, for example, a pair of soaked liquids to be measured
Use the electrode to output a voltage according to the conductivity of the liquid to be measured.
For correcting constants a and b determined from the characteristics of the electrical circuit
It is also possible to apply. Further, the conductivity of the liquid to be measured whose conductivity value is known.
Output value Y of A / D conversion means when measuring the degree value_S
And output of A / D conversion means that should be for known conductivity values
Force Y₀The difference from the correction value H_Y(H_Y= Y₀-Y_S) And before
Apply the same correction method as described above, or
Of the A / D conversion means when the conductivity of the measurement liquid is measured
Impedance value Rt calculated from output value_SAnd known
Should be the impedance value Rt for the conductivity value of₀When
Difference H_R(H_R= Rt₀-Rt_S)
Various correction methods can be applied. Thereby, a pair of electrodes is provided.
Maintenance such as replacement or cleaning of conductivity sensor, liquid to be measured
Even when changes are made, appropriate conductivity can be adjusted with simple adjustments.
The value can be measured. [0044] DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
The embodiment will be described. FIG. 1 shows a photosensitive material according to the present embodiment.
PS processor 10 applied as an example of a charge processing apparatus
The schematic structure of is shown. This PS processor 10
Is a photosensitivity that has been image-exposed by an exposure device (not shown).
Development processing of planographic printing plate (hereinafter referred to as “PS plate 12”)
Do. The PS plate 12 used as a photosensitive material is an Al
This support using a thin rectangular plate such as a minium plate as a support.
A photosensitive layer is formed on the body. Also, as PS plate 12
Layer the photobonding layer, photopolymerization layer and overcoat layer
A photosensitive layer is formed and the image is exposed by laser light.
This accelerates the polymerization reaction in the image area of the photopolymerization layer.
Photopolymer plates can also be applied. PS version processor 10 displays PS version 12
A developing unit 14 for processing with an image liquid, and a developer;
Supply the washed water to the treated PS plate 12 and wash it
The washing plate 16 and the PS plate 12 after washing are used for protecting the plate surface.
A desensitizing treatment unit 18 for applying a liquid to desensitize the oil;
A drying unit 20 for drying the PS plate 12 is provided.
The That is, in the PS version processor 10, the PS version 12
Development direction along the direction of the conveyance direction (arrow A in FIG. 1),
The washing process, desensitizing treatment process and drying process are arranged in order.
It is. In the PS plate processor 10, there is a processing tank.
22 is provided. This processing tank 22 has a processing
A developing tank 24 is formed at a position to be the developing unit 14 as a tank.
In the position that becomes the washing unit 16 and the desensitizing unit 18
A washing tank 26 and a desensitizing treatment tank 28 are formed. Ma
Further, the processing tank 22 has an insertion portion on the upstream side of the developing tank 24.
34 spaces are provided downstream of the desensitizing treatment tank 28
A space for the drying unit 20 is provided on the side. On the outer panel 30 covering the processing tank 22
The slit-shaped insertion port 32 is formed, and the insertion port 32
Further, an insertion portion 34 is formed between the developing portions 14. The PS plate processor 10 includes a processing tank 2.
2 and covers 36 and 38 that cover the top of the drying unit 20.
Is provided. The cover 36 on the insertion port 32 side is treated.
Cover the upper part of the water washing part 16 from the insertion part 34 of the tank 22,
The cover 38 extends from the upper part of the washing unit 16 to the upper part of the drying unit 20.
It arrange | positions so that it may cover between. Further, the cover 36 has a developing unit 14 and water washing.
Reentry for inserting the PS plate 12 between the unit 16
-An insertion port (sub-insertion port) 40 is provided. That
The sub-insertion opening 40 is a PS plate professional except for processing in the developing unit 14.
For inserting the PS plate 12 for processing in the sessa 10
It has become. The insertion portion 34 adjacent to the insertion port 36 has a go
A pair of transport rollers 42 made of rubber is disposed. Image is printed
The cut PS plate 12 is moved in the direction of arrow A from the insertion slot 32.
Inserted between the conveying roller pair 42.
It is inserted. The conveying roller pair 42 is driven to rotate.
With this, the PS plate 12 is pulled from the insertion slot 32.
An angle in the range of about 15 ° to 31 ° with respect to the horizontal direction.
To the developing unit 14. In this embodiment, the support
Single-sided PS plate with a photosensitive layer formed on one side of the holder
12 is used, and the PS plate 12 has a photosensitive layer facing upward.
To the PS processor 10 from the insertion slot 32
Inserted. The developing tank 2 formed in the processing tank 22
4 has a substantially mountain shape with the bottom center protruding downward.
A developer for developing the PS plate 12
Store. The developer tank 24 has a PS plate 12 conveyance direction.
Guide plates 44 and 46 are arranged along the bottom along the bottom.
It is installed. The developing tank 24 includes an upstream portion (insertion portion).
34 side), transported to the midstream part and downstream part (water washing part 16 side)
Roller pairs 48, 50 and 52 are arranged. From the insertion port 32 by the conveying roller pair 42.
The drawn PS plate 12 is moved between the conveying roller pair 48.
Then, the pair of transport rollers 48 displays the PS plate 12.
Pull into the image tank 24. The guide plate 44 is composed of a pair of conveying rollers 48, 50.
Between the developing tank 24 and the conveying roller pair 48.
The PS plate 12 that can be pulled into the interior is a plan that faces diagonally downward
In. Further, the guide plate 46 is composed of a pair of conveying rollers 50, 5
2 is arranged between the two and the PS plate 12 is placed on the bottom surface of the developing tank 24.
Guide it diagonally upward. The transport roller pair 50 is driven to rotate.
Thus, the PS plate 1 guided by the guide plate 44
Feeding toward the guide plate 46 while applying a conveying force to 2
The As a result, the PS plate 12 is substantially U-shaped in the developing tank 24.
It is immersed in the developer while being guided and conveyed in a shape. The transport roller pair 52 is, for example, an outer peripheral portion.
Is formed by a rubber roller, and the guide plate 4
6 to sandwich the PS plate 12 guided by the developing tank 24
While being pulled out, it is fed into the washing section 16. PS version 1
2 when transported in the developing tank 24 in this way
It became unnecessary by being immersed in the developer and exposed to light.
The photosensitive layer is removed. In the developing tank 24, guide plates 44 and 46 are provided.
Spray pipes 54 and 56 are provided on the lower surface side.
In addition, a large number of liquid passing through the guide plates 44 and 46 are provided.
A hole (not shown) is formed. The spray pipes 54 and 56 have circulation pumps.
The developer in the developing tank 24 sucked by the
The developer is ejected into the developer in the developer tank 24.
As a result, the developer in the developing tank 24 is made into each plate, and the PS plate
12 uniform treatments are possible. This
PS through the liquid passage holes formed in the guide plates 44 and 46
When the developer wraps around the transport path side of the plate 12, PS
Rapid development processing of plate 12 and prevention of processing unevenness
I am doing it. Further, a guide plate 46 is provided in the developing tank 24.
Opposing brush roller 58 and conveying roller 60 are provided.
ing. The brush roller 58 is not immersed in the developer.
Hair on the surface of the PS plate 12 conveyed on the guide plate 46
By rotating while contacting the material, PS plate 12
Brushing the surface, unnecessary from the surface of the PS plate 12
The removal of a photosensitive layer is promoted. At this time, the transport roller
60 is brushed by a brush roller 58
The PS plate 12 is prevented from floating from the guide plate 46.
ing. The conveying roller pair 52 is fed from the developing tank 24.
Holding the PS plate 12 to be pulled out, the front and back surfaces of the PS plate 12
This PS plate while squeezing off the developer adhering to
12 is fed into the washing section 16. The flush section 16 is disposed above the flush tank 26.
The PS plate 12 is omitted by the transport roller pairs 62 and 64.
A transport path for transporting in a horizontal state is formed, and PS plate 1
2 is sandwiched between a pair of conveying rollers 62 and 64 and is washed with water.
Is horizontally transported above. The washing unit 16 includes a pair of conveying rollers 62 and 64.
In between, the upper and lower pairs of the PS plate 12 with the transport path sandwiched between them.
Ray pipes 66 and 68 are provided. Spray pie
The axial direction of the plates 66 and 68 is the width direction of the PS plate 12
The PS plate 12 is carried along the direction perpendicular to the direction)
Multiple discharge holes (not shown) facing the feed path are in the axial direction
It is formed along. The washing tank 26 stores washing water.
In the PS processor 10, a water supply pump (not shown)
By synchronizing with the conveyance of the PS plate 12,
Wash water is supplied to the pumps 66 and 68. This allows for water washing
Water is directed from the spray pipes 66 and 68 to the PS plate 12
The developer that is ejected and adheres to the surface of the PS plate 12
Rinse away. The washing water supplied to the PS plate 12 is the PS plate.
When 12 is nipped between the conveying roller pair 64 and sent out
In addition, P together with the developer adhering to the front and back surfaces of the PS plate 12
Squeezed from the S plate 12 and collected in the washing tank 26
The In addition, the spray of flush water from the spray pipes 66 and 68
The exit direction is the direction in which the spray pipe 66 transports the PS plate 12.
On the upstream side, the spray pipe 68 is transported in the PS plate 12
Although it is on the downstream side, it is not limited to this,
May be. Also, the new water for washing water is the processing amount of PS plate 12
Is supplied to the washing tub 26 by means not shown in the drawing.
The The desensitizing treatment section 18 includes a desensitizing treatment tank.
A pair of conveying rollers 70 is provided above 28, and the PS plate 12
Is directed toward the transport roller pair 70 by the transport roller pair 64
Transported in the desensitizing treatment section 18
And then sandwiched by the conveying roller pair 70 and dried.
Sent to the unit 20. The desensitization processing unit 18 carries the PS plate 12.
A spray pipe 72 is provided on the upper side of the feeding path, and the feeding path
A spray pipe 74 is provided on the lower side. Sp
The race pipes 72 and 74 have PS in the longitudinal direction (axial direction).
Along the width direction of the plate 12 and across the conveyance path of the PS plate 12
Located below. Also, spray pipes 72 and 74
A plurality of discharge holes are formed along the width direction of the PS plate 12
Has been. In the desensitizing treatment tank 28, the plate of the PS plate 12 is provided.
The gum solution used for surface protection is stored, and this gum solution
The spray pipes 72 and 74 are synchronized with the conveyance of the PS plate 12.
To be supplied. The spray pipe 72 applies this gum solution to the P
Dripping toward the S plate 12 and spreading it over the surface of the PS plate 12
Cloth. Also, the spray pipe 74 is connected to the PS from the discharge hole.
The gum solution is discharged toward the back of the plate 12 and the PS plate 12
Apply gum solution to the back. The PS plate 12 is coated with this gas applied to the front and back surfaces.
A protective film is formed by the solution. In addition, spray pie
The direction in which the gum solution is discharged from
The direction is not limited to the downstream side, and may be in other directions.
A flow plate is provided, and the gum solution sprayed toward the current plate is adjusted.
Evenly spread along the width direction of the PS plate 12 with the flow plate
Then, apply it to the surface of the PS plate 12 by pouring it off.
May be. Also, instead of the spray pipe 74, the discharge
By moving the PS plate 12 in contact with the gum solution
Dispensing unit for applying gum solution to the back of the PS plate 12
May be used. The desensitizing processing section 18 includes a conveying roller.
A cleaning spray 76 is provided above the pair 70,
The cleaning roller that rotates while contacting the roller above the pair 70
The controller 78 is provided, and a predetermined data set in advance is provided.
Immediately from this cleaning spray 76, the conveying roller pair 7
Straighten at the contact position between the roller above 0 and the cleaning roller 78
The cleaning water is dropped by dropping the cleaning water through the plate 80.
Uniformly spread on the peripheral surface of the rollers above the pair of conveying rollers 70
Let the gum from the peripheral surfaces of the upper and lower rollers of the conveying roller pair 70
The liquid is washed away, and the gum liquid adheres to the peripheral surface of the roller.
12 is prevented from being damaged. The gum solution was applied in the desensitizing treatment section 18.
The PS plate 12 is sandwiched between the conveyance roller pair 70, and the front and back surfaces
The gum solution is sent to the drying unit 20 in a state in which some of the gum solution remains. The PS processor 10 has a desensitizing process.
A partition plate 82 is provided between the section 18 and the drying section 20.
Yes. This partition plate 82 is located above the conveyance path of the PS plate 12
Is disposed so as to face the upper end of the processing tank 22.
Thus, the desensitization processing unit 18 and the drying unit 20
A slit-shaped insertion port 84 is formed between them. In addition,
The partition plate 82 has a double structure,
A groove-like air passage is formed on the drying section 20 side of the insertion opening 84,
When the air in the drying unit 20 enters the air passage,
The air in the drying unit 20 is desensitized from the insertion port 84.
Intrusion into the portion 18 is prevented. In the drying unit 20, in the vicinity of the insertion port 84,
A support roller 86 for supporting the PS plate 12 is provided.
Further, the central portion of the PS plate 12 in the transport direction and the discharge port 88
In the vicinity, a transport roller pair 90 and a transport roller pair 92 are arranged.
It is installed. The PS plate 12 includes a support roller 86 and a conveyance.
It is conveyed in the drying unit 20 by a pair of rollers 90 and 92.
The The support roller 86 and the transport roller pair 90
And between the transport roller pair 90 and the transport roller pair 92.
Is a pair of ducts 94, 96 across the conveying path of the PS plate 12
Is arranged. The ducts 94 and 96 have a longitudinal direction of P.
The PS plate 12 is arranged along the width direction of the S plate 12.
A slit hole 98 is provided on the surface facing the conveyance path of
The Ducts 94 and 96 are provided with dry wind (not shown).
The dry wind generated by the raw means is at one end in the longitudinal direction.
When this is supplied from the slit hole 98,
Discharge toward the transport path of S plate 12 and spray on PS plate 12
I will. Thereby, the PS plate 12 is applied to the front and back surfaces.
The gum solution is dried and a protective film is formed. The developing unit 14 has a developing tank 24 on the bottom surface.
Shield lid so that it is below the level of the developer stored in
100 is disposed, and the developer level in the developing tank 24 is air.
The area in contact with is narrowed. In addition, the sub-insertion of the cover 36
The entrance (reentry insertion port) 40 is not shown.
It is blocked by a shielding member.
Thus, outside air is prevented from entering the developing section 14. The
In addition, the shielding lid 100 includes a pair of conveying rollers protruding from the liquid surface.
The space between the upper rollers of 48 and 52 is narrowed,
As a result, the developer in the developing tank 24 becomes carbon dioxide gas in the air.
To prevent deterioration due to contact with
ing. The shield lid 100 and the processing tank 22 are transported.
Shaped by silicon rubber between roller pair 48, 52, etc.
The formed blade-shaped shielding member is provided,
The developer comes into contact with fresh outside air, or the moisture in the developer
It may be prevented from emitting. The processor 10 configured as described above.
Then, exposure is performed by a printing apparatus (not shown).
The PS plate 12 on which the image is recorded is inserted from the insertion slot 32.
Then, the conveyance roller 42 is driven to rotate. This
The PS plate 12 is sandwiched between the transport roller pair 42.
Are drawn into the PS version processor 10. In the PS version processor 10, the insertion slot
In the vicinity of 32, the PS plate 12 passing through the insertion slot 32 is detected.
Is provided, and this sensor is a PS plate 12
By detecting the insertion of the transport roller pair 42, etc.
PS drive 1 with this sensor
2 at the timing based on the detection of 2
-Discharge of washing water from pipes 66 and 68 and desensitizing treatment
Gum solution spout from spray pipes 72 and 74
I am trying to get out. The conveying roller pair 42 is pulled from the insertion port 32.
The inserted PS plate 12 is 15 ° to 31 ° with respect to the horizontal direction.
Is fed into the developing tank 24 at an insertion angle in the range of. This
The PS plate 12 is guided by guide plates 44 and 46.
In the developing tank 24 by the conveying roller pair 48 to 52
To the developer stored in the developing tank 24.
Dipping and developing solution at a discharge angle in the range of 17 ° to 31 °
Sent from inside. The PS plate 12 is immersed in the developer in the developing tank 24.
By dipping, an unnecessary photosensitive layer is formed depending on the exposure image.
The swollen photosensitive layer is removed from the support. this
When the PS plate processor 10 is placed in the developing tank 24
The surface of the PS plate 12 by the brush roller 58
By brushing the (photosensitive layer side), PS
To facilitate the removal of unwanted photosensitive layers from the surface of the plate 12
I have to. Note that the PS version processor 10 is a complex processor.
Brush the surface of the PS plate 12 using several brush rollers
It may be a thing to do. Development processing is performed and sent from the developing tank 24
The PS plate 12 to be taken out is washed with water by a conveying roller pair 52.
Sent to section 16. At this time, the conveyance roller pair 52 is P
Squeeze off the developer adhering to the front and back surfaces of the S plate 12
The In the washing unit 16, the PS plate 12 is transported to the transport roller.
It is sandwiched between roller pairs 62 and 64 and transported in a substantially horizontal state.
While flushing water from the spray pipes 66 and 68
The In addition, the PS plate 12 is arranged on the downstream side in the conveyance direction.
The conveying roller pair 64 supplied to the front and back surfaces of the PS plate 12
Wash water remains without being squeezed out by the transport roller pair 52
While squeezing down with the developer,
It sends out to the desensitization process part 18. FIG. As a result, the PS plate 12 is provided with the water washing section 16.
When passing, remove the developer remaining on the front and back surfaces.
Is done. PS plate 12 sent to desensitizing treatment section 18
Passes between the spray pipes 72, 74,
By being sandwiched between the pair of rollers 70, the pair of conveying rollers 7
0 is sent out from the desensitization processing unit 18. At this time, the desensitization processing unit 18 performs sprinkling.
PS plate 1 by discharging gum solution from lay pipes 72 and 74
2. Apply the gum solution uniformly to the front and back surfaces of No. 2 while diffusing the gum solution.
The conveyance roller pair 70 sandwiches and conveys the PS plate 12, and surplus
Squeeze out the gum solution from the front and back of the PS plate 12
To form a uniform thin film of gum solution on the front and back surfaces of the PS plate 12.
Form. The PS plate 12 to which the gum solution has been applied is
It is sent from the insertion port 84 to the drying unit 20 by the roller pair 70.
It is inserted. In addition, the shutter is provided in the insertion port 84.
Sometimes PS plate 12 processing start timing or P
Time when S plate 12 is sent out from desensitizing processing section 18
, The shutter is actuated to open the insertion port 84,
When the PS plate 12 does not pass, the drying air of the drying unit 20 is unnecessary.
Enters the desensitization processing section 18 and moves to the conveying roller pair 70.
While preventing the gum solution from sticking, the insertion port 8
4 enters the air and reaches the developing unit 14 in the air.
To prevent the developer from being deteriorated by carbon dioxide gas.
Moisture in the image liquid, washing water, and moisture in the gum liquid evaporate.
It is prevented from coming out from the insertion port 84. In the drying section 20, the support roller 86 and the transport
The PS plate 12 is conveyed by the roller pair 90, 92.
Further, the ducts 94 and 96 are dried on the front and back surfaces of the PS plate 12.
Blow dry air. As a result, the PS plate 12
A protective film is formed by the applied gum solution and the discharge port
88 is discharged. Incidentally, the circulation provided in the developing unit 14 is as follows.
The ring pump 102 has one end connected to the suction side
The other end of 104 opens to the bottom of the developing tank 24, and discharge
Spray pipe through pipe 106 connected to the outlet side
54 and 56 are connected. A branch pipe 108 is connected to the pipe 106.
The conductivity sensor 110 is connected to the branch pipe 108.
It is provided. The conductivity sensor 110 is connected to the circulation pump 102.
Develops into the branch pipe 108 by operating
It is used for measuring the conductivity of the developer in the tank 24. PS version
In the processor 10, the developing tank 24 is based on the conductivity.
The processing performance of the developer is kept constant.
In addition, replenishment of developer replenisher using the conductivity sensor 110
Is disclosed in, for example, Japanese Patent Application Laid-Open No. 20001-290249.
In this embodiment, the details of the replenishment method can be applied.
The detailed explanation is omitted. As shown in FIG. 2, the conductivity sensor 110
Is provided with a pair of electrodes 112 and a heat transfer rod 114.
The pair of electrodes 112 and the heat transfer rod 114 are attached to the holder 116.
Is attached. Each electrode 112 has a lead on one end side.
A wire 118 is connected, and this connecting portion is connected to the heat shrinkable tube 12.
Covered by zero. The electrode 112 is long
The middle part of the direction is the Teflon (R) tube 122
So that the end of the longitudinal direction is constant.
Is exposed as the detection unit 124. The heat transfer rod 114 has one end in the longitudinal direction.
A mounting hole 126 is formed on the side, and this mounting hole 126 is formed.
A temperature detection thermistor (not shown) is inserted inside
By being mounted, the wiring 12 is connected from the mounting hole 126.
8 is drawn. The holder 116 is connected to the cylindrical shaft portion 130.
Formed by a connecting portion 132 on one end side of the shaft portion 130 of
ing. The connecting portion 132 has a male screw on the shaft portion 130 side.
The shaft portion 130 is connected to the branch pipe 108 (see FIG. 1).
To the branch pipe 108 by screwing
Attached. Further, in the connection portion 132 of the holder 116,
Has a connection hole 134 formed therein.
The pair of electrodes 112 are inserted into the bottom of the
Insertion holes into which the insertion holes 136 and 138 and the heat transfer rod 114 are inserted
140 is formed. Insertion holes 136, 138, 14
Each of 0 is extended along the axial direction of the shaft portion 130.
And opened at the tip of the shaft 130. Each of electrode 112 and heat transfer rod 114
The holder is inserted into the insertion holes 136, 138, 140.
116 is attached to the insertion hole 136.1.
38 and 140 are immersed in the developer. It should be noted that the insertion holes 136 and 138 of the electrode 112 are as follows.
Is drilled along the direction perpendicular to the axis of the shaft 130.
The communication holes 142 communicate with each other. Also,
The pair of electrodes 112 and the heat transfer rod 114 include a seal ring.
144 is attached, so that the insertion holes 136-1
Surely that the developer leaks from 40 into the connection hole 134
It is preventing. This holder 116 is substantially circular in the connection hole 132.
The cylindrical spacer 146 is inserted and the cap 148 is
By being attached, a spacer is formed in the connection hole 132.
146 is elastically deformed, and the electrode 112 and the heat transfer rod 114 are
It is sure to hold it down. The spacer 146 has a drawer hole 14.
6A, 146B, 146C are formed, and the cap 148
, A drawer hole 148A is formed in the drawer.
Lead from holes 146A to 146C and lead hole 148A
Line 118 and wiring 128 are drawn out.
The The conductivity sensor 110 shows an example.
And is not intended to limit the configuration of the present invention.
The conductivity sensor is not limited to this.
A configuration can be applied. On the other hand, in FIG.
1 shows a schematic configuration of a conductivity measuring device 150 formed.
ing. The conductivity measuring device 150 is the above-described conductivity sensor.
110, measuring unit 152, A / D converter 154 and co
It is formed by the controller 156. The controller 156 has a general configuration of My.
Equipped with a black computer (microcomputer, not shown)
As an example, the PS plate processor 10 uses the PS plate processor.
A controller that controls the operation of the processor 10 is used.
The The measuring unit 152 includes a sine wave generating circuit 158,
Constant current circuit 160, amplifier circuit 162, and offset circuit
164 has a general configuration. Sine wave circuit 1
58 generates a sine wave having a predetermined frequency.
Input to the current circuit 160. The constant current circuit 160 is
Outputs a current that matches the sine wave. This constant current circuit 1
The output of 60 is input to the amplifier circuit 162 and the current
Conductivity cell placed in the image tank 24 and immersed in the developer.
It is supplied to one electrode 112 of the sensor 110. The amplifier circuit 162 is connected to the constant current circuit 160.
A constant current to be output is input and the pair of electrodes 11
The other of the two is connected, whereby the amplifier circuit 162 is connected.
Is the impedance value of the developer between the pair of electrodes 112
Amplifies the voltage according to the output. The offset circuit 164 has a variable resistance.
A resistor 166 is provided, and an input signal of the amplifier circuit 162 is provided.
The offset is output. Offset amount at this time
Can be adjusted by a variable resistor 166. The output of the measuring unit 152 is an A / D converter.
154 is digitally converted to the controller 15
6 is input. That is, the conductivity measuring device 150
The measured value using the conductivity sensor 110 is measured by the measuring unit 152.
A / D conversion by the A / D converter 154
As a result, the output value of the measurement unit 152 is
Input to the troller 156. Also, the controller 156 has a conductivity sensor.
From a thermistor (not shown) provided in the sensor 110
The wiring 128 is connected, so that the developer temperature
Can be measured. The controller 156 includes an A / D converter 15
The output value input from 4 and the conductivity value of the developer from the solution temperature
Is calculated. The controller 156
Is a replenishing means (not shown) based on the conductivity of the developer.
, The conductivity of the developer becomes PS plate 12
Is maintained within the proper processing range, and the PS processor 1
0 can always develop the PS plate 12 with constant quality
I am doing it. Here, development by the conductivity measuring device 150 is performed.
The measurement of the electrical conductivity of the liquid will be described. In the conductivity measuring device 150, a pair of electrodes 1
12 to the A / D converter 154 on the circuit
A constant to obtain a change in output value according to conversion
In addition, the conductivity of the developer that is the solution to be measured is applied to the pair of electrodes.
To determine the intrinsic constant of the developer that affects the measured value
From here, the conductivity value changes according to the change in the conductivity of the developer.
An arithmetic expression is set to obtain
It is stored in the roller 156. Further, in the conductivity measuring device 150, a known
Using a developer with conductivity, measure the conductivity value of this developer.
To do. At this time, the conductivity value calculated by the arithmetic expression and
Define correction conditions or formulas based on actual conductivity differences
The number replacement value is stored in the controller 156. At this time, correction values H (mS / cm), A /
Output value Y (digdt) of D converter 154 and developer solution
When the temperature is Td, the conductivity value Lr (mS / cm) is generally
Expressed as a function of correction value H, output value Y and liquid temperature Td.
It is. The amplifier circuit 162 has a measured value of a pair of electrodes.
Is input as a voltage. The output value Y is the pair of electrodes
112 depending on the measurement value input from 112
The change characteristics include a sine wave generation circuit 158 and a constant current circuit 16.
0, amplifier circuit 162, offset circuit 164, and A / D
It is determined by the converter 154. That is, conductivity sensor
110 and the A / D converter 154 except for 110
Determined. In addition, the measured value of electrical conductivity is measured in the developer.
Minute, developer temperature, conductivity sensor 110 varies accordingly.
The Especially when the conductivity sensor 110 is replaced,
By performing maintenance such as cleaning of the electrode 112,
The measured value changes. From this point, the conductivity measuring device 150 is preliminarily determined.
Set the characteristics of the measuring unit 152 and the A / D converter 154,
An appropriate conductivity value can be obtained from this characteristic and the characteristics of the developer.
In the following, specific examples will be explained as examples.
Light up. [0115] Example 1 In Example 1 described here, the liquid to be measured is measured.
Specific constant F for conductivity₁By correcting
An appropriate conductivity value Lr is obtained. That is,
The corrected constant is constant F₁′, The conductivity value Lr is Lr = f (F₁', Y, Td) As obtained. Constant F₁' F₁'= G (H) As obtained. That is, in Example 1, Lr = f (F₁', Y, Td) As a result, the conductivity value Lr is calculated. Here, the variables Rt and βt are set and the conductivity is set.
The value Lr is represented by equation (1). [0117]     Lr = 1 + J + 1000 / (Rt · βt) (1)     Rt = (a + b · Y / c) · F₁′ / 100 (2)     βt = F₂・ Td + d (3) Where J is a cell constant, and a, b, c, and d are input side conditions.
The measurement unit 152 and the A / D converter 154
And constant F₂Is specific to the developer being measured
It is a constant. At this time, the corrected constant F₁'Is a constant
e and m are determined by the measurement unit 152 and the A / D converter 154.
If it is a constant,     F₁'= F₁+ (E ・ L₀+ M) ・ H ・ F₁/ F_S              ... (4) However, constant F_SIs the known conductivity L₀Conductivity of liquid to be measured
Intrinsic constant F for₁, Constant F₁Is the power of the developer to be measured.
It can be an intrinsic constant for the conductivity. In the conductivity measuring device 150, the conductivity used is
Cell constant J of sensor 110A is J = 10, constant a,
Each of b, c, d is a = 90, b = 290, c =
1023, d = 0.5325. Next, the following specific constant F₁, F₂Have
The constants e and m are determined using one developer. F₁= 103.0 F₂= 219 x 10^-Four First, the known conductivity L₀= 41.5 (mS / cm) coverage
Conductivity value Lr of measuring solution₀Measure Lr₀= 38.5 (m
S / cm). Correction value H at this time₀Is +3
The Next, when the correction value H is H = 0, Lr =
L₀F_Ten‘F’_Ten'= 95.3 is obtained. same
Similarly, the known conductivity L of the same type of liquid to be measured₁= 50
Conductivity value Lr at (mS / cm)₁Measure Lr₁
= 46.4 (mS / cm) confirmed. At this time, the correction value H
₁Is +3.6. Using these data, the following equation F_Ten'= F₁+ (E ・ L₀+ M) ・ H₀= F₁+ (E ・ L₁
+ M) ・ H₁ From 95.35 = 103 + (41.5 × e + m) × 3 95.35 = 103 + (50 × e + m) × 3.6 E = 5.0000 × 10−2, m = −4.62
50 is obtained. The constants e and m are measured by the measuring unit 152 and A /
Since it is a constant determined by the D converter 154, other developer
Or even if it is derived with a different conductivity value from this time, it will be the same value.
The However, the measurement unit 152 and the A / D converter 154
If the whole constant changes, that is, these constants are different
Devices must newly determine constants e and m.
Not. In this way, a specific example in this embodiment is described.
A value is obtained. When such a method for measuring conductivity is used.
First, the developer A having a known conductivity is measured. This
Here, as an example, conductivity L₀= 41.05 (mS /
cm) of developer A, and initially at a liquid temperature of Td = 25 ° C.
Make adjustments. In the initial adjustment, the correction value H = 0.
The The inherent constant F of the developer A₁, F₂Is
Below is the value. F₁= F_S= 103.0 F₂= 219 x 10^-Four When the correction value H = 0, F₁'= F₁Because the figure
As shown in FIG. 4 (A) and FIG.
Output value of the A / D converter 154 in the conductivity measuring device 150
Reference characteristic curve A of conductivity value Lr with respect to Y_SIs obtained
The Note that FIG. 4B is an enlarged view of the main part of FIG.
doing. Next, a specific adjustment method will be described. Using the conductivity sensor 110A, the liquid temperature Td
= When the conductivity of Developer A at 25 ° C was measured,
Degree value L_SWas 35.5 (mS / cm),
Conductivity value Lr measured and calculated by the conductivity measuring device 150
However, 6 (mS / cm) lower than the actual conductivity
The In this case, the correction value H is H = L₀-L_S= 41.5-35.5 = + 6 Thus, the correction value H is input by the input means. In addition, the input means confirms other correction conditions.
Conductivity value L, which is the value required to determine₀, Constant F_SEnter
Like the correction value H, these values
Stored in the controller 156 by inputting
Is converted to an equation with a correction value H = +6.
This completes the adjustment of the conductivity sensor 110A. This converted arithmetic expression is shown in FIG.
As shown in FIG. 4B, the reference characteristic curve AS1 is shifted.
The characteristic curve Aa1 is obtained. This will output
An appropriate conductivity value Lr can be obtained from the value Y. In addition, instead of the conductivity sensor 110A, an electric
When the conductivity sensor 110B is used, the conductivity value L_S= 4
When it was 3.5 (mS / cm), conductivity measuring device
The conductivity value Lr measured and calculated at 150 is the actual conductivity
Since it is 2 (mS / cm) higher than the degree value, FIG.
As shown in FIG. 4A and FIG. _S1
Characteristic curve A shifted_a2become that way. Furthermore, the conductivity sensors 110A and 110B.
When another conductivity sensor 110C is used, the conductivity is
Value L_S= 47.5 (mS / cm)
The conductivity value Lr measured and calculated by the degree measuring device 150 is
6 (mS / cm) higher than the actual conductivity value
Therefore, as shown in FIG. 4 (A) and FIG.
Sex curve A_S1Characteristic curve A shifted_a3become that way. It should be noted that the conductivity value L_S(35.5 (mS / c
m)) is a liquid other than the liquid temperature Td = 25 ° C. as described above.
Also at the temperature, the conductivity value when the liquid temperature Td = 25 ° C.
It is calculated as follows. That is, development
Specific constant F for liquid temperature₂To an appropriate value
Therefore, the liquid temperature Td is always 25 ° C regardless of the liquid temperature Td.
The electric conductivity value at the time of is calculated. As shown in FIG. 5, this relationship is related to the reference characteristics.
In the case of a curve, the reference characteristic curve A at a liquid temperature Td = 25 ° C_S1But
Reference characteristic curve A when liquid temperature Td = 30 ° C_S2As
, Conductivity sensor 110A, corrected characteristic curve
Line A_b1The conductivity sensors 110B and 110C
Each corrected characteristic curve is the characteristic curve._Ab2, A_{b Three}
become that way. In this way, the conductivity sensor 110, the measurement
Constant determined by the fixed unit 152 and the A / D converter 154
As well as the developer input by the input means.
An arithmetic expression is set using the specific constant of the liquid to be measured.
By having an appropriate correction condition in the formula, the conductivity sensor
Replacement and maintenance of the sensor 110 and measurement unit 152 were performed.
Sometimes the conductivity value of the liquid to be measured with a known conductivity is only once
The type of liquid to be measured can be adjusted by simple adjustment.
Regardless of the electrical conductivity value, it is possible to measure the appropriate electrical conductivity value
Become. On the other hand, when the liquid to be measured changes, for example, the current
When the image liquid A is changed to the developer B, the constant F₁and
Constant F₂Changes. At this time, a new developer solution is required.
Constant F₁And constant F₂Enter the correct
The conductivity value Lr can be measured. Here, the constant F₁, F₂Different developer A,
The conductivity of the developer B is determined by the conductivity sensors 110A and 110A.
Using each of B and 110C, the conductivity measurement 150
The test results measured in Table 2 and Table 3 are shown. Table 1
Includes constants F of developer A and developer B.₁, Constant F₂Indicate
Table 2 shows the test results (conductivity at a liquid temperature Td of 25 ° C.
Table 3 shows that the liquid temperature Td is 30 ° C.
The test results (conductivity value Lr) measured values are shown. Ma
In addition, adjustment of each correction value is performed by adjusting the conductivity L₀41.5
(MS / cm) of developer A and developer B
It was. [0140] [Table 1] [0141] [Table 2] [0142] [Table 3] As is clear from Tables 1 and 2, in any case
Even in the case, the measurement error is 1% or less, and the conductivity measurement
The device 150 measures a substantially proper conductivity value Lr.
It can be said that. Thus, a developer having a known conductivity is measured.
Depending on the difference between the electrical conductivity value and the actual electrical conductivity value,
Reference characteristic curve A_SUse a characteristic curve that has been shifted
Therefore, the conductivity value Lr can be obtained easily and accurately.
You can. At this time, the characteristics of the developer and the pair of electrodes 11
2 to output value based on characteristics from A / D converter 154
Based on the characteristic curve of Y-conductivity value Lr, conductivity value Lr
Therefore, the change width of the conductivity of the developer is
Even if it is large, an appropriate conductivity value Lr can be obtained. [0146] Second Embodiment In the second embodiment described here, the output value Y is
By correcting, to obtain an appropriate conductivity value Lr
doing. That is, the corrected output value is set as the output value Y ′.
Then, the conductivity value Lr is Lr = f (Y ', Td) As obtained. The output value Y ′ is Y '= g (Y, H) As obtained. That is, in Example 2, Lr = f (Y ′, Td) As a result, the conductivity value Lr is calculated. Here, the variables Rt and βt are set and the conductivity is set.
The value Lr is expressed by equation (1). [0148]     Lr = 1 + J · 1000 / (Rt · βt) (1)     Rt = (a + b · Y ′ / c) · F₁/ 100 (2)     βt = F₂・ Td + d (3) Where J is a cell constant, and a, b, c, and d are input side conditions.
In other words, the measurement unit 152 and the A / D converter 154
F₁, F₂Is the solidity of the developer to be measured.
It is assumed to be a constant. At this time, the corrected output value Y 'is n,
p is a constant determined by the measurement unit 152 and the A / d converter 154
Then,     Y ′ = Y + (n + p · Y) · H ′ (4) It can be. Further, for example, based on the conductivity value,
Threshold for controlling activity and conductivity measurement
Set the center value etc. of the fixed range as the reference conductivity Lx, known
Conductivity (conductivity L₀) Measured the conductivity value of the developer
When the uncorrected conductivity value is L_SAnd when H ′ = H · r (L₀) r (L₀) = K · (Lx−L₀) + Q H = L₀-Lr₀ From here, it is corrected based on equation (4)
The obtained output value Y 'is obtained. In the conductivity measuring device 150, the conductivity used is
Cell constant J of sensor 110A = 10, constants a, b, c,
d is a = 90, b = 290, c = 1023, d
= 0.5325. Next, the following specific constant F₁, F₂Or
Thus, constants n, p, k, and q are obtained. F₁= 103.0 F₂= 219 x 10-4 First, the known conductivity L0 = at the liquid temperature Td = 25 ° C.
Conductivity Lr of measured liquid of 41.5 (mS / cm)₀Measure
Lr₀= 38.5 (mS / cm) confirmed. This
Correction value H₀Is +3. Next, the conductivity L₀And conductivity value Lr₀Output
Output value Y which is value Y₀', Y₀And Y₀'= 46
6, Y₀= 529 is obtained. Similarly, the same type of liquid to be measured
Known conductivity L₁= Conductivity when 50 (mS / cm)
Degree value Lr₁Measure Lr₁= 46.4 (mS / cm)
Check and conductivity L₁And conductivity value Lr₁Is the output value Y of
Output value Y₁', Y₁And Y₁'= 330, Y₁= 38
Get 2. These data are expressed as follows: Y₀'= Y₀+ (N · Y₀+ P) ・ H₀ Y₁‘= Y₁+ (N · Y₁+ P) ・ H₀ put in, 466 = 529 + (529 × n + p) × 3 330 = 382 + (382 × n + p) × 3 N = −2.4943 × 10^-2, P = 7.805
0 is obtained. Next, when obtaining k and q, the above-mentioned
Known conductivity L when n and p are obtained₁= 50 (mS /
cm) conductivity value Lr₁= 46.4 (mS / cm) is measured
The difference (L₁-Lr₁), That is, the correction value
H₁== 3.6, Hx = H₀+ (K · (Lx−L₀) + Q) Hx = H₁+ (K · (Lx−L₁) + Q) However, Hx is calculated based on the calculated reference conductivity Lx.
Correction value of Lx = L₀Then, Hx = H₀And 3 = 3 + (k × (41.5-41.5) + q) 3 = 3.6 + (k × (41.5−50) + q) Gives k = −7.0588 × −2, q = 0.
The These constants n, p, k, q are measured by the measuring unit 1
52 and the A / D converter 154 are constants.
Calculate the reference electrical conductivity Lx and the correction value Hx at that time
If it is clear, the conductivity value is different from other developers and this time.
The same number is obtained even if derived by. Now, the specifics of the correction method in this embodiment will be described.
A typical value was obtained. A specific correction method is the same as that in the first embodiment.
In the same way, the known conductivity L used when the correction was performed₀Measured
Conductivity value Lr measured for liquid₀Correction value H is derived from
Value H, conductivity L₀And constant F_SEnter to complete. Na
Oh, constant F_SAdjust as described in Example 1.
It is an inherent constant for the conductivity of the liquid being measured.
The In addition, the conductivity measuring device 150 uses the conductivity sensor.
Measurement unit 152 or A / D converter 1 instead of sensor 110
If 54 is exchanged, the constants a, b,
Set c, d, etc. and calculate constants n, p, k, q
By setting the reference characteristic curve Ls, the developing solution
It is possible to measure the proper conductivity value Lr as when changing
The In the second embodiment, the corrected output value Y '
The appropriate conductivity value Lr was obtained from Rt = (a + b · Y ′ / c) · F₁/ 100) Therefore, a and b used as constants are known.
Measure and set the conductivity value of the developer with a conductivity of
Even in this case, it is possible to calculate the appropriate conductivity value Lr.
It becomes possible to go out. [0162] Third Embodiment Next, a third embodiment will be described. Example 3
Then, it demonstrates not as a developing solution but as a to-be-measured liquid. In the first and second embodiments described above, the reference
Characteristic curve A_STo be measured corrected by shifting
Intrinsic constant F of the liquid₁'And output value Y' are obtained.
However, in Example 3, a liquid to be measured having a known conductivity was measured.
To correct by the correction value H at the time of adjustment
The electric conductivity value Lr is obtained. That is, the conductivity value before correction is Lr, and correction is performed.
If the later conductivity value is Lr ′,     Lr '= H + Lr         = H + f (Y, Td) (5) Get as. At this time,     Lr ′ = H + 1 + J · 1000 / (Rt · βt ′) (6) Rt = (a + b · Y / c) · F₁/ 100 βt = F₂・ Td + d H = L₀-Lr₀ It becomes. Thus, the conductivity L₀In the vicinity of
Can obtain an appropriate conductivity value Lr.
If the conductivity of the liquid to be measured is kept within a narrow range,
Measurement of conductivity of liquid to be measured whose degree of change varies only within a narrow range
Can be applied to. Here, the constant F₁= 100.0, constant F₂=
When measuring the conductivity value Lr of the liquid to be measured of 0.0277
First, the conductivity L₀Use a liquid to be measured (known conductivity)
Then, the conductivity measuring device 150 is adjusted. At this time,
In the conductivity measuring device 150, the cell constant J = 1, the constant a,
b, c and d are a = 90, b = 190 and c = 6, respectively.
69, d = 0.4325. From here, the reference characteristic curve A shown in FIG._SBut
can get. In FIG. 6, the liquid temperature Td is 30 ° C. (Td
= 30) shows an example, and the liquid temperature Td is 25 ° C. with a broken line.
Reference characteristic curve A (Td = 25)_S1Shows On the other hand, the conductivity sensors 110A, 110B, 110C
When each is used, the known conductivity L0 = 5.95
Conductivity value L when measuring liquid to be measured (mS / cm)
r is Lr₁= 4.95 (mS / cm), Lr₂= 6.4
5 (mS / cm), Lr_Three= 7.45 (mS / cm)
If there is, correction value H from here₁, H₂, H_ThreeIs obtained. H₁= L₀-Lr₁ H₂= L₀-Lr₂ H_Three= L₀-Lr_Three By using the correction value H set in this way
Conductivity L₀Near the conductivity sensors 110A, 1
Appropriate conductivity when using either 10B or 110C
A degree value Lr is obtained. It should be noted that the present embodiment described above is the same as the present invention.
It does not limit the structure of the light. For example, this form
In the state, P when processing the PS plate 12 as a photosensitive material.
For example, the S version processor 10 is used for the PS version processor.
Is described as an example of the solution to be measured,
In the present invention, the present invention is applied to the measurement of the conductivity value of any liquid to be measured.
Can be. [0171] As described above, according to the present invention, the electric power supply can be used.
Compensating by measuring the conductivity of a liquid to be measured with a known conductivity
Set a positive condition and calculate the conductivity value based on this correction condition.
As it is calculated, accurate adjustment with simple adjustment
An excellent effect that the value can be measured is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of a PS plate processor applied to the present embodiment. FIG. 2 is a schematic perspective view showing an example of a conductivity sensor provided in the PS plate processor. FIG. 3 is a block diagram showing a schematic configuration of a conductivity measuring device. 4A is a diagram showing an outline of a characteristic of an electrical conductivity value with respect to an output value of Example 1, and FIG. 4B is a diagram showing a main part of FIG. 4A. FIG. 5 is a diagram showing an outline of the characteristic of the conductivity value with respect to the output value when the liquid temperature is different from that in FIG. 4 (B). 6 is a diagram showing an outline of the characteristic of the conductivity value with respect to the output value of Example 2. FIG. [Explanation of Symbols] 10 PS Plate Processor 12 PS Plate 14 Developing Unit 24 Developing Tank 108 Branch Pipe 110 (110A, 110B, 110C) Conductivity Sensor 112 Electrode 114 Heat Transfer Rod (Liquid Temperature Measuring Means) 150 Conductivity Measuring Device 152 Measuring unit (measuring means) 154 A / D converter (A / D converting means) 156 Controller (calculating means)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takayuki Iwamoto             1250 Takematsu, Minamiashigara City, Kanagawa Prefecture Fuji Equipment             Industrial Co., Ltd. F-term (reference) 2G060 AA06 AE40 AF06 AG01 HA02                       HC01 HC02 HC13                 2H096 AA07 GA08 GA22 LA19

Claims (1)

1. A pair of electrodes immersed in a liquid to be measured; an electric circuit that outputs a voltage corresponding to the conductivity of the liquid to be measured measured using the pair of electrodes; A / D conversion means for A / D converting and outputting the voltage value output by the electric circuit, liquid temperature measuring means for measuring the liquid temperature of the liquid to be measured, and output value of the A / D conversion means And a calculating means for calculating an electric conductivity value of the liquid to be measured based on the liquid temperature measured by the liquid temperature measuring means, and a method for measuring the electric conductivity using: a constant determined from the characteristics of the pair of electrodes; The electrical conductivity for the output value of the A / D conversion means based on a constant determined from the characteristics of the electrical circuit, a specific constant for the conductivity of the liquid to be measured, and a specific constant for the temperature of the liquid to be measured Set the equation to calculate the degree value and conduct Output value of the known test liquid of the A / D converting means or said A /
A correction condition is set based on either one of the impedance value and the conductivity obtained by calculating from the output value of the D conversion means, and the calculation means measures the conductivity of the liquid to be measured. An electrical conductivity measurement method, wherein an electrical conductivity value is calculated based on an output value of an A / D conversion means, the arithmetic expression, and the correction condition.