JPH04340451A - Electric conductivity meter - Google Patents
Electric conductivity meterInfo
- Publication number
- JPH04340451A JPH04340451A JP11206191A JP11206191A JPH04340451A JP H04340451 A JPH04340451 A JP H04340451A JP 11206191 A JP11206191 A JP 11206191A JP 11206191 A JP11206191 A JP 11206191A JP H04340451 A JPH04340451 A JP H04340451A
- Authority
- JP
- Japan
- Prior art keywords
- sample water
- switching valve
- conductivity
- conductivity meter
- electric conductivity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 3
- 239000003456 ion exchange resin Substances 0.000 description 3
- 229920003303 ion-exchange polymer Polymers 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は試料水の導電率を連続的
に測定して試料水中の残留塩素濃度を測定するプロセス
用流通型導電率計に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow-through conductivity meter for process use that continuously measures the conductivity of sample water to determine the residual chlorine concentration in the sample water.
【０００２】0002
【従来の技術】導電率計は、電極に試料水中の鉄分など
の不純物が付着して電気的に短絡を起こすために、一定
期間継続的に使用した場合は、電極を洗浄してゼロ校正
を行う必要がある。従来の導電率計では導電率計のゼロ
校正を行う必要が生じた時には、計測者が試料水供給路
を流れる試料水をいったん止めてイオン交換樹脂等を通
したイオン交換水などの導電率ゼロの溶液を導電率セル
に通水し、ゼロ点の確認及び校正作業を行っている。[Prior Art] When a conductivity meter is used continuously for a certain period of time, the electrode must be cleaned and zero-calibrated because impurities such as iron in the sample water adhere to the electrode and cause an electrical short circuit. There is a need to do. With conventional conductivity meters, when it becomes necessary to zero-calibrate the conductivity meter, the measurer must stop the sample water flowing through the sample water supply path and calibrate the conductivity of ion-exchanged water that has passed through an ion-exchange resin to zero. The solution is passed through the conductivity cell to check the zero point and perform calibration work.
【０００３】0003
【発明が解決しようとする課題】しかしながら、上記の
ような従来のゼロ校正作業では、計測者によって試料水
の流れを止めて導電率ゼロの溶液を導電率セル内に通水
しなければならないため、導電率計のゼロ校正を行うに
は人手を必要とし、しかも、手間がかかるという問題点
があった。また、導電率セル内に通水する導電率ゼロの
ゼロ水を必要とするという問題点もあった。[Problem to be Solved by the Invention] However, in the conventional zero calibration work as described above, the flow of sample water must be stopped by the measurer and a solution with zero conductivity must be passed into the conductivity cell. However, there was a problem in that zero calibration of the conductivity meter required manual labor and was time-consuming. Further, there was a problem in that zero water with zero conductivity was required to be passed through the conductivity cell.
【０００４】本発明は上記のような問題点を解決するた
めになされたもので、導電率計のゼロ校正を自動的に行
うことができ、しかも、導電率ゼロのゼロ水を必要とし
ない導電率計を提供することを目的としている。The present invention has been made to solve the above-mentioned problems, and it is possible to automatically perform zero calibration of a conductivity meter, and moreover, it is a conductivity meter that does not require zero conductivity water. The purpose is to provide a rate meter.
【０００５】[0005]
【課題を解決するための手段】本発明の導電率計は、試
料水を導電率セルに通水して試料水の導電率を測定する
導電率計において、導電率セルの流入口に連通する試料
水供給路を配設し、この供給路の途中に流路を排水路側
に切り換える第１切り換えバルブを設け、この第１切り
換えバルブの上流側の試料水供給路の途中にバイパス路
を設け、このバイパス路と試料水供給路の合流点を第２
切り換えバルブを介して接続し、前記バイパス路に試料
水をろ過するフィルタを設けている。[Means for Solving the Problems] The conductivity meter of the present invention is a conductivity meter that measures the conductivity of the sample water by passing the sample water through the conductivity cell. A sample water supply channel is provided, a first switching valve for switching the flow channel to the drainage channel side is provided in the middle of this supply channel, and a bypass channel is provided in the middle of the sample water supply channel on the upstream side of the first switching valve, The confluence of this bypass path and the sample water supply path is
A filter is connected through a switching valve and is provided in the bypass path for filtering sample water.
【０００６】[0006]
【作用】本発明は、試料水供給路を流れる試料水の通水
を中断し、第１切り換えバルブを排水路側に切り換えて
導電率セル内に溜まった試料水を排出した後、第１切り
換えバルブの流路を導電率セル側に切り換えると共に、
第２切り換えバルブの流路をフィルタを設けたバイパス
路側に切り換えて導電率セル内にろ過水を通水して電極
を洗浄し、電極の洗浄後ろ過水の通水を中断して第１切
り換えバルブを排水路側に切り換えて導電率セル内のろ
過水を排水し、電極間の電気的導電率がゼロの状態でゼ
ロ校正を行う。[Operation] The present invention interrupts the flow of sample water through the sample water supply channel, switches the first switching valve to the drain channel side, drains the sample water accumulated in the conductivity cell, and then closes the first switching valve. At the same time as switching the flow path to the conductivity cell side,
Switch the flow path of the second switching valve to the bypass path side equipped with a filter, pass filtered water into the conductivity cell to wash the electrode, and after washing the electrode, interrupt the flow of filtered water and switch to the first switching valve. Switch the valve to the drain side to drain the filtrate in the conductivity cell, and perform zero calibration in a state where the electrical conductivity between the electrodes is zero.
【０００７】[0007]
【実施例】以下に本発明の一実施例について、図面を参
照しながら説明する。図１は本発明の一実施例における
導電率計を用いて試料水の導電率を連続的に測定する場
合のフローを示した概要図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing the flow of continuously measuring the conductivity of sample water using a conductivity meter according to an embodiment of the present invention.
【０００８】本発明の導電率計は、導電率計本体１と、
導電率計本体１の流入口１２に設けられた第１切り換え
バルブ２と、試料水を通水する試料水供給路３と、この
試料水供給路３の途中に設けられたバイパス路４と、こ
のバイパス路４に設けられたフィルタ５と、バイパス路
４と試料水供給路３の合流点に設けられた第２切り換え
バルブ６と、第１切り換えバルブ２と第２切り換えバル
ブ６等を制御する制御装置７と、排水路８から構成され
ている。The conductivity meter of the present invention includes a conductivity meter main body 1,
A first switching valve 2 provided at the inlet 12 of the conductivity meter main body 1, a sample water supply path 3 through which sample water passes, a bypass path 4 provided in the middle of this sample water supply path 3, The filter 5 provided in the bypass path 4, the second switching valve 6 provided at the confluence of the bypass path 4 and the sample water supply path 3, the first switching valve 2, the second switching valve 6, etc. are controlled. It is composed of a control device 7 and a drainage channel 8.
【０００９】導電率計本体１の上部はｐＨ計９、下部は
導電率セル１０であって、この導電率計本体１の中央部
には流出口１１、下端部には流入口１２を有し、導電率
セル１０の下部に電極１３が設けられている。The upper part of the conductivity meter main body 1 is a pH meter 9, and the lower part is a conductivity cell 10, and the conductivity meter main body 1 has an outlet 11 at the center and an inlet 12 at the lower end. , an electrode 13 is provided at the bottom of the conductivity cell 10.
【００１０】導電率計本体１の流入口１２の近傍に第１
切り換えバルブ２が設けられている。この第１切り換え
バルブ２は三方弁であって、この切り換えバルブ２の一
方の出口２Ｂは導電率計本体１の流入口１２と連通して
おり、他方の出口２Ｃは排水路８と連通している。In the vicinity of the inlet 12 of the conductivity meter main body 1, a first
A switching valve 2 is provided. This first switching valve 2 is a three-way valve, and one outlet 2B of this switching valve 2 communicates with the inlet 12 of the conductivity meter main body 1, and the other outlet 2C communicates with the drainage channel 8. There is.
【００１１】第１切り換えバルブ２の入口２Ａ側は、試
料水供給路３の下流側の一端部と連通している。そして
、試料水供給路３の上流にはバイパス路４が設けられ、
このバイパス路４と試料水供給路３の合流点に第２切り
換えバルブ６が取り付けられている。なお、この第２切
り換えバルブ６も第１切り換えバルブと同様の三方弁で
ある。The inlet 2A side of the first switching valve 2 communicates with one end of the sample water supply path 3 on the downstream side. A bypass path 4 is provided upstream of the sample water supply path 3,
A second switching valve 6 is installed at the confluence of the bypass path 4 and the sample water supply path 3. Note that this second switching valve 6 is also a three-way valve similar to the first switching valve.
【００１２】前記バイパス路４にはフィルタ５が設けら
れている。このフィルタ５は、試料水からろ過水を生成
するためのもので、活性炭やろ過膜から構成され試料水
中のイオン分や少なくとも汚れを除去できるようにして
いる。なお、フィルタ５にイオン交換樹脂を用いればイ
オン分を完全に除去できて好都合である。A filter 5 is provided in the bypass path 4. This filter 5 is for producing filtered water from sample water, and is made of activated carbon and a filtration membrane, and is capable of removing ions and at least dirt from sample water. Note that it is convenient to use an ion exchange resin for the filter 5 because ions can be completely removed.
【００１３】また、バイパス路４と並設する試料水供給
路３Ａには周知の流量調整バルブ１４が設けられ、試料
水供給路３を流れる試料水の流量を調節している。なお
、導電率計本体１の流出口１１と排水路８は連通してい
る。[0013] Further, a well-known flow rate adjustment valve 14 is provided in the sample water supply path 3A, which is arranged in parallel with the bypass path 4, to adjust the flow rate of the sample water flowing through the sample water supply path 3. Note that the outlet 11 of the conductivity meter main body 1 and the drainage channel 8 are in communication.
【００１４】以上のように構成された導電率計について
、以下その動作を説明する。図１は、本発明の導電率計
が試料水の導電率を連続的に測定する場合のフローを示
している。図１のように試料水を連続的に測定する場合
は、まず、制御装置７によって、第１切り換えバルブ２
と、第２切り換えバルブ６を制御し、第１切り換えバル
ブ２の入口２Ａと導電率計本体１の流入口１２が連通す
るようにバルブを制御すると共に、第２切り換えバルブ
６の一方の入口６Ａと出口６Ｃが連通するように第２切
り換えバルブ６を制御する。これによって、試料水がバ
イパス路４と並設する試料水供給路３Ａ、第２切り換え
バルブ６、試料水供給路３、第１切り換えバルブ２を流
れて導電率計セル１０内に流入して、導電率計本体１の
流出口１１側から排水路８を通って流出する。このよう
に導電率計本体１内を試料水が通過する間に導電率セル
１０の電極１３によって試料水の導電率が測定される。The operation of the conductivity meter constructed as above will be explained below. FIG. 1 shows the flow when the conductivity meter of the present invention continuously measures the conductivity of sample water. When measuring sample water continuously as shown in FIG.
and controls the second switching valve 6 so that the inlet 2A of the first switching valve 2 and the inlet 12 of the conductivity meter main body 1 communicate with each other, and one inlet 6A of the second switching valve 6. The second switching valve 6 is controlled so that the outlet 6C communicates with the outlet 6C. As a result, the sample water flows through the sample water supply path 3A arranged in parallel with the bypass path 4, the second switching valve 6, the sample water supply path 3, and the first switching valve 2, and flows into the conductivity meter cell 10. The water flows out from the outlet 11 side of the conductivity meter main body 1 through the drainage channel 8. In this manner, while the sample water passes through the conductivity meter main body 1, the conductivity of the sample water is measured by the electrode 13 of the conductivity cell 10.
【００１５】次に、導電率計のゼロ校正を行う場合を説
明する。まず、図２のように制御装置７によって第１切
り換えバルブ２の入口２Ａ側を閉じると共に、制御装置
７のタイマーによって一定時間、第１切り換えバルブ２
の一方の出口２Ｂと他方の出口２Ｃを連通させて導電率
セル１０内に残っている試料水を排水路８側に排水する
。Next, the case of performing zero calibration of the conductivity meter will be explained. First, as shown in FIG. 2, the control device 7 closes the inlet 2A side of the first switching valve 2, and the timer of the control device 7 closes the first switching valve 2 for a certain period of time.
The sample water remaining in the conductivity cell 10 is drained to the drain channel 8 side by making one outlet 2B and the other outlet 2C communicate with each other.
【００１６】そして、図３に示すように制御装置７によ
って第１切り換えバルブ２の入口２Ａと一方の出口２Ｂ
が連通するようにバルブを制御すると共に、第２切り換
えバルブ６の一方の入口６Ｂと出口６Ｃが連通するよう
に第２切り換えバルブ６を制御すると、試料水はバイパ
ス路４のフィルタ５を通ってろ過水に変わって試料水供
給路３を流れ第１切り換えバルブ２を通って導電率セル
１０内を流入し、導電率計本体１の流出口１１から排水
路８に流れ出す。このようにろ過水を導電率セル１０内
に通水させることによって電極１３の洗浄を行うことが
できる。As shown in FIG. 3, the control device 7 controls the inlet 2A and one outlet 2B of the first switching valve 2.
When the second switching valve 6 is controlled so that one of the inlets 6B and one outlet 6C of the second switching valve 6 communicates with each other, the sample water passes through the filter 5 of the bypass path 4. Instead of filtered water, it flows through the sample water supply channel 3, passes through the first switching valve 2, flows into the conductivity cell 10, and flows out from the outlet 11 of the conductivity meter main body 1 into the drain channel 8. By passing filtered water into the conductivity cell 10 in this manner, the electrode 13 can be cleaned.
【００１７】さらに、図２のように制御装置７によって
第１切り換えバルブ２の入口２Ａ側を閉じると共に、第
１切り換えバルブ２の一方の出口２Ｂと他方の出口２Ｃ
を連通させてこんどは導電率セル１０内に残っているろ
過水を排水路８側に排水する。ろ過水を全て排出し終わ
った後に、導電率計のゼロ校正を自動的に行う。そして
、図１の動作にもどれば試料水の測定を行うことができ
る。Further, as shown in FIG. 2, the control device 7 closes the inlet 2A side of the first switching valve 2, and closes one outlet 2B and the other outlet 2C of the first switching valve 2.
The filtered water remaining in the conductivity cell 10 is then drained to the drain channel 8 side. After all the filtered water has been drained, zero calibration of the conductivity meter is automatically performed. Then, by returning to the operation shown in FIG. 1, the sample water can be measured.
【００１８】このように一連の動作を行うことによって
導電率セル１０内の電極１３の洗浄を行うことができる
と共に、ゼロ水をイオン交換樹脂等で完全にイオン分を
取り除くことなくゼロ校正を行うことができる。By performing a series of operations in this manner, the electrode 13 in the conductivity cell 10 can be cleaned, and zero calibration can be performed without completely removing ions from the zero water using an ion exchange resin or the like. be able to.
【００１９】[0019]
【発明の効果】以上のように本発明によれば、試料水供
給路の途中に流路を排水路側に切り換える第１切り換え
バルブを設け、この第１切り換えバルブの上流側の試料
水供給路の途中にバイパス路を設け、このバイパス路と
試料水供給路の合流点を第２切り換えバルブを介して接
続し、バイパス路に試料水をろ過するフィルタを設けた
ことにより、自動的に電極の洗浄を行うことができて人
手による導電率セルのメンテナンス周期がのびる。しか
も、ゼロ校正を行う時に、特別にゼロ校正したゼロ水を
必要とせずにゼロ校正ができる。As described above, according to the present invention, a first switching valve for switching the flow channel to the drainage channel side is provided in the middle of the sample water supply channel, and the sample water supply channel on the upstream side of the first switching valve is A bypass path is provided in the middle, the confluence of this bypass path and the sample water supply path is connected via a second switching valve, and a filter for filtering the sample water is installed in the bypass path to automatically clean the electrode. This can extend the period of manual maintenance of the conductivity cell. Moreover, when performing zero calibration, zero calibration can be performed without requiring special zero-calibrated zero water.
【図１】本発明の一実施例における導電率計の試料水計
測中のフローを示した概要図である。FIG. 1 is a schematic diagram showing a flow during sample water measurement by a conductivity meter in an embodiment of the present invention.
【図２】本発明の一実施例における導電率セル内の試料
水等を排出するフローを示した概要図である。FIG. 2 is a schematic diagram showing a flow for discharging sample water and the like from a conductivity cell in an embodiment of the present invention.
【図３】本発明の一実施例における導電率セル内を洗浄
するフローを示した概要図である。FIG. 3 is a schematic diagram showing a flow of cleaning the inside of a conductivity cell in an embodiment of the present invention.
２ 第１切り換えバルブ ３ 試料水供給路 ４ バイパス ５ フィルタ ６ 第２切り換えバルブ ８ 排水路 １０ 導電率セル １２ 流入口 2 First switching valve 3 Sample water supply path 4 Bypass 5 Filter 6 Second switching valve 8 Drainage channel 10 Conductivity cell 12 Inlet
Claims (1)
の導電率を測定する導電率計において、導電率セルの流
入口に連通する試料水供給路を配設し、この供給路の途
中に流路を排水路側に切り換える第１切り換えバルブを
設け、この第１切り換えバルブの上流側の試料水供給路
の途中にバイパス路を設け、このバイパス路と試料水供
給路の合流点を第２切り換えバルブを介して接続し、前
記バイパス路に試料水をろ過するフィルタを設けたこと
を特徴とする導電率計。Claim 1: A conductivity meter that measures the conductivity of the sample water by passing the sample water through a conductivity cell, wherein a sample water supply path communicating with the inlet of the conductivity cell is provided, and the supply path A first switching valve is provided in the middle of the flow path to switch the flow path to the drainage channel side, a bypass path is provided in the middle of the sample water supply path on the upstream side of this first switching valve, and the confluence of the bypass path and the sample water supply path is A conductivity meter, characterized in that it is connected via a second switching valve and is provided with a filter for filtering sample water in the bypass path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11206191A JPH04340451A (en) | 1991-05-17 | 1991-05-17 | Electric conductivity meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11206191A JPH04340451A (en) | 1991-05-17 | 1991-05-17 | Electric conductivity meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04340451A true JPH04340451A (en) | 1992-11-26 |
Family
ID=14577067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11206191A Pending JPH04340451A (en) | 1991-05-17 | 1991-05-17 | Electric conductivity meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04340451A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004506185A (en) * | 2000-08-07 | 2004-02-26 | シーヴァーズ インスツルメンツ，インク． | Low level boron detection and measurement |
-
1991
- 1991-05-17 JP JP11206191A patent/JPH04340451A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004506185A (en) * | 2000-08-07 | 2004-02-26 | シーヴァーズ インスツルメンツ，インク． | Low level boron detection and measurement |
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