JP2967240B2 - Automatic continuous analyzer with alarm transmission function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic continuous analyzer for water quality, air, and the like, and more particularly, to an alarm transmission function for outputting an alarm signal when a measured value of a sample falls outside a predetermined allowable range. The present invention relates to an automatic continuous analyzer attached.

[0002]

2. Description of the Related Art In the case of continuously monitoring water quality in a water treatment plant or the like, an automatic continuous analyzer having an alarm transmission function having a configuration shown in FIG. 2 is generally used. That is, FIG.
In the apparatus shown in (1), a is a sample introduction tube, b is an electromagnetic valve, c is a detection unit, d is a converter, and e is a control unit. In this apparatus, turbidity, chromaticity, pH, residual chlorine concentration, electric conductivity, water pressure, water temperature and the like of a sample water are usually measured. When water quality is analyzed by the above device, the valve b is opened under the control of the control unit e, and the sample is introduced into the detection unit c. Then, the detection unit c measures the above-described items, and the necessary signals are converted into respective measured values such as turbidity and chromaticity by the converter d, and then output as the measured values f. When the measured value f is out of the predetermined allowable range, an alarm signal g notifying that an abnormality has occurred is output.

[0003]

However, when the alarm signal is output, that is, when the measured value exceeds the allowable range, the apparatus shown in FIG. 2 determines whether the abnormality is caused by an abnormality in water quality. It does not have a function to determine whether the cause is an abnormality of the device. Therefore, when performing the measurement with the measuring device of FIG. 2, when an alarm signal is issued, a person judges the quality of the water using another meter and inspects the measuring device to check the quality. Thereafter, it is necessary to determine whether the cause of the alarm is due to the water quality or the device based on the result, and this determination takes a very long time. For this reason, it takes a long time after an alarm signal is issued until the countermeasures, that is, inspection and maintenance of the water treatment system or the measuring device, are performed, and the water quality can be sufficiently managed. Did not.

[0004] On the other hand, conventionally, there is a means for automatically performing calibration at regular intervals and determining in advance whether or not the apparatus is abnormal. However, this means requires a reconfirmation to make a critical decision such as "water stoppage" when an alarm signal is issued, the need for frequent replenishment of the calibration solution, and the use of a converter to perform automatic calibration. Has a practical problem such as that the configuration becomes complicated.

The present invention has been made in view of the above circumstances, and issues an alarm when a measured value deviates from a predetermined allowable range, and whether the alarm is caused by the substance to be measured or by the apparatus itself. It is an object of the present invention to provide an automatic continuous analyzer for automatically judging whether or not there is no difference.

[0006]

According to the present invention, there is provided an automatic continuous analyzer for outputting an alarm signal when a measured value of a sample is out of a predetermined allowable range. Before the alarm signal is output to the outside,
The measurement of the determination substance that can obtain a certain measurement value is automatically performed instead of the measurement of the sample, and the apparatus is used when the actual measurement value of the determination substance differs from the measurement value to be obtained by the determination substance by a certain amount or more. An automatic continuous analyzer with an alarm transmission function is configured to output a device abnormality signal indicating that the device is abnormal.

In the present apparatus, when an alarm signal is issued during the measurement of a sample, the determination substance is measured. Since this determination substance is prepared in advance so that a constant measured value is obtained, if the actual measured value is within a predetermined range, that is, if the measured value is within the range of the measurement error, the apparatus is used. Is determined to be normal, and therefore, the sample is determined to be abnormal, and an alarm signal is output. If the measured value of the determination substance is out of the predetermined range, it is determined that there is an abnormality in the apparatus itself, and an apparatus abnormality signal is output.

In this case, the apparatus of the present invention is a water quality analyzer,
It can be configured in any analyzer such as an air analyzer. Further, the apparatus of the present invention can be configured as any of an analyzer that performs measurement of one item and an analyzer that performs measurement of a plurality of items. When the analyzer is configured to measure a plurality of items, the output of the alarm signal and the determination by the determination substance may be performed for all the measured items, or the determination may be performed for only some of the items. . Further, in the present invention, any substance can be used as the determination substance, as long as it is prepared so as to obtain a constant measured value. For example, a standard liquid and a zero liquid can be used for a liquid, and a standard gas and a zero gas can be used for a gas, but are not limited thereto.

[0009]

EXAMPLES Next, the present invention will be specifically described by way of examples, but the present invention is not limited to the following examples. FIG. 1 shows an automatic continuous water quality analyzer according to one embodiment of the present invention. In the figure, 1 is a sample introduction pipe, 2 is an electromagnetic valve interposed in the sample introduction pipe 1, 3 is a determination liquid tank, 4 is a determination liquid tank 3
Is an electromagnetic valve interposed in the determination liquid introduction pipe 4, and 6 is a detection unit connected to the sample introduction pipe 1 and the determination liquid introduction pipe 4. In this detection unit 6, , Turbidity, chromaticity, pH, residual chlorine concentration, electric conductivity, water pressure and water temperature are measured by corresponding detectors. Reference numeral 7 denotes a converter which communicates with the detection unit 6 and converts a signal from the detection unit into each measured value.
3 shows a comparison operation unit.

When the water quality is continuously analyzed by the present apparatus, the valve 2 is opened and the valve 5 is closed, and the sample is introduced into the detecting section 6, where the turbidity, chromaticity, pH, residual chlorine, electric Conduct conductivity, water temperature and water pressure measurements. If necessary, the signal is converted into each measured value by the converter 7 and output as the measured value 9. In this device, the measurement is normally continued in the above state, but if the measured value of one or more measurement items exceeds a predetermined allowable range, an alarm signal 10A for the measurement item is output from the converter 7. You.

When the alarm signal 10A is thus issued, the following measurement operations are performed under the control of the control / comparison operation unit 8. After the output of the alarm signal 10A from the converter 7, the measurement of the sample is performed as it is for a predetermined period of time (for example, 3 minutes). If the measured value returns within the allowable range within this fixed time, it is determined that the cause of the alarm is a temporary abnormality in water quality, and the measurement of the sample is continued as it is. If the measured value is still outside the permissible range after performing the measurement of the sample for a certain period of time, the valve 2 is closed, the valve 5 is opened, and the determination liquid is introduced into the detector 6 for a certain period (for example, 10 minutes). Measure the determination liquid. The determination liquid (determination substance) is prepared so as to obtain a constant measurement value (zero or a specific measurement value) for each required measurement item. Then, the control / comparison operation unit 8 compares the measured value to be obtained with the judgment liquid with the actually measured value of the judgment liquid, and the actually measured value is within a certain allowable range determined based on the measured value to be obtained. In that case, the device is determined to be normal. Therefore, it is determined that the water quality is abnormal, and an alarm signal 10B is output to the outside. If the measured value is out of the allowable range, the apparatus is determined to be abnormal, and the apparatus does not output the alarm signal 10B to the outside, but instead transmits the apparatus abnormality signal 11. Next, in both cases where the determination of the apparatus is normal and abnormal, the valves 2 and 5 are switched to return to the sample measurement state. When it is determined that the device is normal, the process returns to the measurement state of the sample, a warning signal 10B is output, and it is definitely determined that the water quality is abnormal. When the apparatus returns to the measurement state of the sample after it is determined that the apparatus is abnormal, the measurement is continued with the apparatus abnormality signal 11 output for the measurement item determined to be abnormal. This is because normal measurement values are continuously obtained for normal measurement items.

After the above-mentioned judgment is completed, appropriate measures are taken based on the judgment result. That is, when it is determined that the water quality is abnormal, detection and improvement of the cause of the abnormality are performed. If it is determined that the equipment is abnormal, check the equipment,
Perform repairs, etc. Therefore, according to the present apparatus, when the warning signal 10A is issued, it is possible to quickly and automatically determine whether the cause is the apparatus or the water quality. Therefore, the time from when the warning signal 10B is output to when the countermeasure is taken can be greatly reduced, and water quality can be effectively managed.

[0013]

As described above, the automatic continuous analyzer with an alarm transmission function of the present invention, when an alarm signal is issued, determines whether the alarm is caused by an abnormality in the substance to be measured or not. It is possible to automatically determine whether the abnormality is based on the abnormality. Therefore, by using the apparatus of the present invention, when an alarm is issued, it can be promptly dealt with, and continuous automatic continuous monitoring of water quality, atmosphere, and the like can be effectively performed.

[0014]

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an automatic continuous water quality analyzer according to one embodiment of the present invention.

FIG. 2 is a schematic view showing a conventional automatic analyzer for water quality.

[0015]

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sample introduction pipe 4 ... Judgment liquid introduction pipe 6 ... Detector 7 ... Converter 8 ... Control / comparison operation part 9 ... Measured value output 10 ... Alarm signal 11 ... Equipment abnormal signal

Continuation of the front page (56) References JP-A-1-148964 (JP, A) JP-A-63-14289 (JP, A) JP-A-53-160327 (JP, U) JP-B-56-19909 (JP, A) , B2) (58) Field surveyed (Int. Cl. ⁶ , DB name) G01N 35/00-35/10

Claims (1)

(57) [Claims] 1. An automatic analyzer for outputting an alarm signal when a measured value of a sample is out of a predetermined allowable range, wherein a predetermined measured value is obtained when the alarm signal is output. The measurement of a substance is automatically performed instead of the measurement of a sample, and when the actual measurement value of the determination substance differs from the measurement value to be obtained by the determination substance by a certain amount or more, it indicates that the apparatus is abnormal. An automatic continuous analyzer with an alarm transmission function, which is configured to output a signal.