JPH07103932A - Measuring apparatus for ph provided with self-diagnostic function and measuring method for ph using the apparatus - Google Patents
Measuring apparatus for ph provided with self-diagnostic function and measuring method for ph using the apparatusInfo
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- JPH07103932A JPH07103932A JP26815593A JP26815593A JPH07103932A JP H07103932 A JPH07103932 A JP H07103932A JP 26815593 A JP26815593 A JP 26815593A JP 26815593 A JP26815593 A JP 26815593A JP H07103932 A JPH07103932 A JP H07103932A
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ガラス電極及び加圧内
部液式比較電極を備え、プロセス、上下水、排水等のp
H測定を行う屋外設置型pH測定装置として好適に使用
される自己診断機能付きpH測定装置及びこの装置を用
いたpH測定方法に関する。BACKGROUND OF THE INVENTION The present invention is provided with a glass electrode and a pressurized internal liquid type reference electrode, and can be used for processes, sewage, drainage, etc.
The present invention relates to a pH measuring device with a self-diagnosis function, which is suitably used as an outdoor pH measuring device for measuring H, and a pH measuring method using this device.
【0002】[0002]
【従来の技術】従来、プロセス、上下水、排水等のpH
測定を行う屋外設置型pH測定装置として、ガラス電極
及び加圧内部液式比較電極を備えたものが多用されてい
る。このpH測定装置は、例えば図2に示す構成を有す
るものである。2. Description of the Related Art Conventionally, pH of process, sewage, waste water, etc.
As an outdoor-installed pH measuring device for measuring, a device equipped with a glass electrode and a pressurized internal liquid type reference electrode is often used. This pH measuring device has, for example, the configuration shown in FIG.
【0003】図2のpH測定装置2において、4はガラ
ス電極、6は加圧内部液式比較電極、8は比較電極6の
液絡部、10は比較電極6の内部液(KCl溶液)、1
2は連絡管14を介して比較電極6に連結された内部液
貯留容器、16は貯留容器12内に貯留された補充用内
部液、18は貯留容器12に形成された加圧口、20は
加圧口18から貯留容器12内の補充用内部液16及び
比較電極6内の内部液10を加圧する加圧手段を示す。In the pH measuring device 2 of FIG. 2, 4 is a glass electrode, 6 is a pressurized internal liquid type reference electrode, 8 is a liquid junction of the reference electrode 6, 10 is an internal liquid (KCl solution) of the reference electrode 6, 1
Reference numeral 2 is an internal liquid storage container connected to the reference electrode 6 via the connecting pipe 14, 16 is a supplementary internal liquid stored in the storage container 12, 18 is a pressurizing port formed in the storage container 12, and 20 is The pressurizing means for pressurizing the replenishing internal liquid 16 in the storage container 12 and the internal liquid 10 in the comparison electrode 6 from the pressurizing port 18 is shown.
【0004】加圧手段20としては、例えば計装用エア
ー、手動ポンプ等が使用され、通常、被検液の最高圧力
よりも0.3〜0.5Kgf/cm2程度高い圧力で貯留容器
12内の補充用内部液16及び比較電極6内の内部液1
0を加圧する。このとき、計装用エアーによって加圧を
行う場合には、貯留容器12内に連続的に加圧圧力を加
える。また、手動ポンプによって加圧を行う場合には、
貯留容器12内に加圧圧力を加えた後、貯留容器12を
密閉する。As the pressurizing means 20, for example, instrumentation air, a manual pump, etc. are used, and usually, the pressure inside the storage container 12 is higher than the maximum pressure of the test liquid by about 0.3 to 0.5 Kgf / cm 2 . Internal liquid 16 for replenishing the liquid and internal liquid 1 in the reference electrode 6
Press 0. At this time, when the pressure is applied by the instrumentation air, the pressure is continuously applied to the inside of the storage container 12. Also, when pressurizing with a manual pump,
After applying a pressure to the inside of the storage container 12, the storage container 12 is closed.
【0005】図2のpH測定装置2においては、貯留容
器12に内部液16を入れ、この内部液16を連絡管1
4を通して比較電極6内に流入させると共に、液絡部8
から微量の内部液10を加圧手段20等による差圧(内
部液圧力と被検液圧力との差)によって被検液中に流出
させつつ測定を行なう。これにより、比較電極6の液絡
部8がつまりやすい被検液であっても、内部液10は強
制的に液絡部8から流出し、安定な測定が行われる。In the pH measuring device 2 of FIG. 2, the internal liquid 16 is put in the storage container 12, and the internal liquid 16 is connected to the connecting pipe 1.
4 into the reference electrode 6 and the liquid junction 8
The measurement is performed while causing a small amount of the internal liquid 10 to flow into the test liquid by the pressure difference (difference between the internal liquid pressure and the test liquid pressure) due to the pressurizing means 20 or the like. As a result, even if the liquid junction 8 of the reference electrode 6 is a test liquid that is likely to be clogged, the internal liquid 10 is forcibly discharged from the liquid junction 8 and stable measurement is performed.
【0006】図2にしめしたようなガラス電極及び加圧
内部液式比較電極を備えたpH測定装置では、内部液の
流出を担保するため、被検液の圧力に応じて内部液を一
定圧力で加圧する。したがって、内部液圧力を圧力計に
より監視している。In the pH measuring device equipped with the glass electrode and the pressurized internal liquid type reference electrode as shown in FIG. 2, the internal liquid is kept at a constant pressure in accordance with the pressure of the test liquid in order to ensure the outflow of the internal liquid. Pressurize with. Therefore, the internal liquid pressure is monitored by the pressure gauge.
【0007】[0007]
【発明が解決しようとする課題】ガラス電極及び加圧内
部液式比較電極を備えたpH測定装置では、被検液圧力
が測定時に予想外に低くなった場合、一定圧力で被検液
を加圧し続けると、内部液が急激に流出してしまう。こ
のとき、手動ポンプーで内部液の加圧を行っている場合
には、被検液圧力が低下しても内部液圧力はすぐには低
下しない。また、計装用エアーで加圧を行っている場合
には、被検液圧力の低下は内部液圧力に全く影響しな
い。したがって、ガラス電極及び加圧内部液式比較電極
を備えたpH測定装置においては、従来のように内部液
圧力を監視するだけでは、内部液加圧圧力の設定値から
のずれや内部液の急激な流出をチェックできないことを
本発明者らは見い出した。以下、この点について説明す
る。In a pH measuring device equipped with a glass electrode and a pressurized internal liquid type reference electrode, when the pressure of the test liquid becomes unexpectedly low during measurement, the test liquid is applied at a constant pressure. If you continue to press, the internal liquid will suddenly flow out. At this time, when the internal liquid is pressurized by the manual pump, the internal liquid pressure does not immediately decrease even if the test liquid pressure decreases. Further, when the pressure is applied by the instrumentation air, the decrease in the test liquid pressure does not affect the internal liquid pressure at all. Therefore, in a pH measuring device equipped with a glass electrode and a pressurized internal liquid type reference electrode, it is necessary to simply monitor the internal liquid pressure as in the conventional case so that the internal liquid pressurization pressure may deviate from the set value or the internal liquid may suddenly change. The present inventors have found that it is not possible to check for such a spill. Hereinafter, this point will be described.
【0008】図3は発酵プロセスにおける被検液圧力の
変動例を示すものである。図3からわかるように、被検
液圧力は待機・標準液校正段階ではゼロ、滅菌段階では
2Kgf/cm2、発酵計測中では0.5Kgf/cm2、終了・待機
段階ではゼロになり、pH測定時に被検液圧力が0.5
〜2Kgf/cm2の範囲で大きく変動する。FIG. 3 shows an example of fluctuation of the pressure of the test liquid in the fermentation process. As can be seen from FIG. 3, the zero in the test solution pressure standby-standard solution calibration phase, 2 Kgf / cm 2 in sterile stage, the fermentation measures 0.5 Kgf / cm 2, becomes zero at the end-wait step, pH The test solution pressure is 0.5 during measurement
It fluctuates greatly in the range of up to 2 Kgf / cm 2 .
【0009】図3に示した被検液のpHをガラス電極及
び加圧内部液式比較電極を備えたpH測定装置で測定す
る場合、内部液と被検液との差圧が0.5Kgf/cm2のと
きの内部液流出量の目安を1ml/dayとすると、被検液の
最高圧力は2Kgf/cm2であるから、内部液の加圧圧力は
通常2.5Kgf/cm2に設定される。そうすると、被検液
の圧力が2Kgf/cm2のとき(滅菌段階)には、下記式 (2.5−2)×(1/0.5)=1ml/day より、目安通りに1ml/dayの内部液消費となる。When the pH of the test liquid shown in FIG. 3 is measured by a pH measuring device equipped with a glass electrode and a pressurized internal liquid type reference electrode, the differential pressure between the internal liquid and the test liquid is 0.5 Kgf / The maximum pressure of the test liquid is 2 Kgf / cm 2 , and the pressure of the internal liquid is usually set to 2.5 Kgf / cm 2 when the guideline of the internal liquid outflow rate at cm 2 is 1 ml / day. It Then, when the pressure of the test solution is 2 Kgf / cm 2 (sterilization stage), the following formula (2.5-2) × (1 / 0.5) = 1 ml / day, 1 ml / day It becomes the internal liquid consumption.
【0010】しかし、被検液の圧力が0.5Kgf/cm2に
変動したとき(発酵計測中)には、内部液と被検液との
差圧と、内部液の流出量とは正比例するから、下記式 (2.5−0.5)×(1/0.5)=4ml/day より、4ml/dayの内部液消費となり、内部液の流出量が
4倍に増大する。However, when the pressure of the test liquid fluctuates to 0.5 Kgf / cm 2 (during fermentation measurement), the differential pressure between the internal liquid and the test liquid is directly proportional to the outflow amount of the internal liquid. From the following formula (2.5-0.5) × (1 / 0.5) = 4 ml / day, the internal liquid consumption is 4 ml / day, and the outflow amount of the internal liquid increases four times.
【0011】このようなpH測定時に圧力が変動する被
検液のpH測定を行う場合、被検液の圧力が大きく減少
すると、内部液と被検液との差圧が大きくなり、内部液
が急激に流出するので、比較電極から内部液がなくなっ
て測定不能になることがある。When the pH of a test liquid whose pressure fluctuates during such pH measurement is measured, if the pressure of the test liquid greatly decreases, the differential pressure between the internal liquid and the test liquid increases, and Since the liquid suddenly flows out, the internal liquid may disappear from the reference electrode and measurement may not be possible.
【0012】また、発酵プロセス以外にも、pH測定時
に圧力が変動する被検液としては、図4に示すように圧
力が測定時に連続的に増減する被検液や、図5に示すよ
うに生産出力が大きい昼間には圧力が高くなり、生産出
力が小さい夜間には圧力が低くなる生産プラント内の被
検液がある。これら図4及び図5に示したような被検液
のpHを測定する場合も、図3に示した被検液の測定と
同様の問題が生じる。In addition to the fermentation process, as the test liquid whose pressure fluctuates during pH measurement, the test liquid whose pressure continuously increases or decreases during measurement as shown in FIG. 4 or as shown in FIG. There is a test liquid in the production plant that has a high pressure during the daytime when the production output is large and has a low pressure during the nighttime when the production output is small. When measuring the pH of the test liquid as shown in FIGS. 4 and 5, the same problem as in the measurement of the test liquid shown in FIG. 3 occurs.
【0013】本発明は、上記事情に鑑みなされたもの
で、内部液加圧圧力の設定値からのずれ及び被検液の圧
力が大きく低下したときの内部液の流出のしすぎをチェ
ックすることが可能なpH測定装置を提供することを目
的とする。The present invention has been made in view of the above circumstances, and checks the deviation of the internal liquid pressurization pressure from the set value and the excessive outflow of the internal liquid when the pressure of the test liquid greatly decreases. It is an object of the present invention to provide a pH measuring device capable of performing the above.
【0014】[0014]
【課題を解決するための手段及び作用】本発明者らは、
上記目的を達成するために種々検討を行い、加圧内部液
式比較電極を有するpH測定装置を用いて圧力が変動す
る被検液のpH測定を行う場合、被検液圧力が大きく減
少した場合に内部液と被検液との差圧が大きくなり、内
部液が急激に流出するのであるから、内部液と被検液と
の差圧をチェックし、上記差圧が常に一定になるように
内部液の加圧圧力を制御することにより、内部液の流出
のしすぎを防止できることにまず想到した。Means and Actions for Solving the Problems The present inventors have
In order to achieve the above object, various investigations were performed, and when the pH of a test liquid with varying pressure was measured using a pH measuring device with a pressurized internal liquid type reference electrode, when the test liquid pressure decreased significantly. Since the differential pressure between the internal liquid and the test liquid becomes large and the internal liquid suddenly flows out, check the differential pressure between the internal liquid and the test liquid, and make sure that the differential pressure is always constant. By controlling the pressurization pressure of the internal liquid, it was first conceived that it is possible to prevent the internal liquid from flowing out too much.
【0015】そして、本発明者らはさらに検討を行った
結果、内部液と被検液との差圧をチェックする方法で
は、被検液の圧力を測定することが困難である上、差圧
の制御機構が複雑になるという問題があるのに対し、比
較電極の内部液圧力検知手段と内部液量検知手段とを設
け、上記圧力検知手段で内部液の圧力変動を常に監視す
るとともに、上記内部液量検知手段で内部液の液量減少
を常に監視し、内部液圧力が所定レベルから外れたとき
及び内部液量が所定レベルから外れたときに警報を発す
ることにより、簡便な手段で内部液加圧圧力の設定値か
らのずれや内部液の流出のしすぎを適正にチェックする
ことが可能となることを知見し、本発明をなすに至っ
た。As a result of further investigations by the present inventors, it is difficult to measure the pressure of the test liquid by the method of checking the differential pressure between the internal liquid and the test liquid, and the differential pressure However, the internal liquid pressure detection means and the internal liquid amount detection means of the reference electrode are provided, and the pressure detection means constantly monitors the pressure fluctuation of the internal liquid. The internal liquid amount detection means constantly monitors the decrease of the internal liquid amount, and when the internal liquid pressure is out of the predetermined level and the alarm is issued when the internal liquid amount is out of the predetermined level, the internal liquid is detected by a simple means. The inventors have found that it is possible to properly check the deviation of the liquid pressurization pressure from the set value and the excessive outflow of the internal liquid, and have completed the present invention.
【0016】したがって、本発明は、ガラス電極及び加
圧内部液式比較電極を備えたpH測定装置において、前
記比較電極の内部液圧力検知手段と、前記比較電極の内
部液量検知手段と、前記両検知手段と接続した警報信号
発生手段とを具備することを特徴とする自己診断機能付
きpH測定装置を提供する。Therefore, according to the present invention, in a pH measuring device equipped with a glass electrode and a pressurized internal liquid type reference electrode, an internal liquid pressure detecting means of the reference electrode, an internal liquid amount detecting means of the reference electrode, and A pH measuring device with a self-diagnosis function, comprising: an alarm signal generating means connected to both detecting means.
【0017】また、本発明は、pH測定時に圧力が変動
する被検液のpH測定を上記の自己診断機能付きpH測
定装置を用いて行うことを特徴とするpH測定方法を提
供する。この場合、本発明pH測定方法で測定を行うこ
とができるpH測定時に圧力が変動する被検液として
は、例えば発酵プロセスにおける被検液等が挙げられ
る。The present invention also provides a pH measuring method characterized in that the pH of a test liquid whose pressure fluctuates during pH measurement is measured by using the above-mentioned pH measuring device with a self-diagnosis function. In this case, examples of the test liquid whose pressure fluctuates during pH measurement that can be measured by the pH measuring method of the present invention include a test liquid in a fermentation process.
【0018】本発明において、ガラス電極及び加圧内部
液式比較電極の種類に限定はなく、公知のものを使用す
ることができる。この場合、ガラス電極及び比較電極と
しては、別体のものを組み合わせて用いてもよく、これ
らを一体化した複合電極を用いてもよい。In the present invention, the types of the glass electrode and the pressurized internal liquid type reference electrode are not limited, and known ones can be used. In this case, as the glass electrode and the reference electrode, separate ones may be used in combination, or a composite electrode in which these are integrated may be used.
【0019】また、内部液圧力検知手段、内部液量検知
手段、警報信号発生手段の種類にも制限はなく、例えば
内部液圧力検知手段としてはマイクロスイッチ接点方式
のスイッチ内蔵圧力計等、比較電極の内部液量検知手段
としてはフロート式レベルスイッチ等、警報信号発生手
段としては警報接点信号出力回路等の任意のものを用い
ることができる。There is no limitation on the types of the internal liquid pressure detecting means, the internal liquid amount detecting means, and the alarm signal generating means. For example, the internal liquid pressure detecting means may be a microswitch contact type built-in switch pressure gauge, a reference electrode, or the like. A float type level switch or the like can be used as the internal liquid amount detecting means, and an alarm contact signal output circuit or the like can be used as the alarm signal generating means.
【0020】内部液圧力検知手段及び内部液量検知手段
は、比較電極に内部液貯留容器を連結している場合に
は、この貯留容器内の内部液圧力及び内部液量を検知す
るように設ける。また、比較電極に内部液貯留容器を連
結していない場合には、比較電極ホルダー内の内部液圧
力及び内部液量を検知するように設ける。The internal liquid pressure detecting means and the internal liquid amount detecting means are provided so as to detect the internal liquid pressure and the internal liquid amount in the storage container when the internal liquid storage container is connected to the reference electrode. . Further, when the internal liquid storage container is not connected to the reference electrode, it is provided so as to detect the internal liquid pressure and the internal liquid amount in the reference electrode holder.
【0021】本発明の自己診断機能付きpH測定装置に
は、必要に応じ、電極の事故対策手段としてのガラス膜
クラック検知手段、液絡部目詰まり検知手段といった他
の自己診断手段を設け、これらの自己診断手段を警報信
号発生手段に接続するようにしてもよい。The pH measuring device with self-diagnosis function of the present invention is provided with other self-diagnosis means such as a glass film crack detection means and a liquid junction clogging detection means as electrode accident countermeasure means, if necessary. The self-diagnosis means may be connected to the alarm signal generating means.
【0022】本発明の自己診断機能付きpH測定装置を
用いて圧力が変動する被検液のpH測定を行う場合、被
検液圧力が減少して内部液と被検液との差圧が大きくな
ると、内部液が急激に流出する。このとき、手動ポンプ
ーで内部液を加圧している場合には被検液圧力が低下し
ても内部液圧力はすぐには低下しない。また、計装用エ
アーで内部液を加圧している場合には被検液圧力の低下
は内部液圧力に全く影響しない。したがって、本発明測
定装置では、内部液圧力が所定レベル以下となったとき
及び内部液量が所定レベル以下となったときの両方にそ
れぞれ警報信号発生手段から警報信号を発生するように
設定する。When the pH of the test liquid whose pressure fluctuates is measured using the pH measuring device with the self-diagnosis function of the present invention, the pressure of the test liquid decreases and the differential pressure between the internal liquid and the test liquid increases. Then, the internal liquid suddenly flows out. At this time, when the internal liquid is pressurized by the manual pump, the internal liquid pressure does not immediately decrease even if the test liquid pressure decreases. Further, when the internal liquid is pressurized with instrumentation air, the decrease in the test liquid pressure does not affect the internal liquid pressure at all. Therefore, in the measuring device of the present invention, the alarm signal generating means is set to generate an alarm signal both when the internal liquid pressure falls below a predetermined level and when the internal liquid amount falls below a predetermined level.
【0023】これにより、測定装置の管理者は、内部液
加圧圧力の設定値からのずれや内部液の流出のしすぎを
適正にチェックし、内部液の補充や内部液加圧圧力の調
整をタイミングよく行うことが可能となる。As a result, the manager of the measuring device appropriately checks the deviation of the internal liquid pressurization pressure from the set value and the excessive outflow of the internal liquid, and replenishes the internal liquid and adjusts the internal liquid pressurization pressure. It becomes possible to do it in a timely manner.
【0024】なお、計装用エアーによって内部液の加圧
を行っている場合、バルブ等の具合によって内部液の加
圧圧力が必要以上に高くなることがある。本発明の自己
診断機能付きpH測定装置では、このような圧力上昇を
検知するために、内部液圧力が所定レベル以上となった
とき警報信号発生手段から警報信号を発生するように設
定することもできる。When pressurizing the internal liquid with instrumentation air, the pressurization pressure of the internal liquid may become unnecessarily high depending on the condition of the valve or the like. In the pH measuring device with the self-diagnosis function of the present invention, in order to detect such a pressure increase, it is possible to set the alarm signal generating means to generate an alarm signal when the internal liquid pressure exceeds a predetermined level. it can.
【0025】[0025]
【実施例】以下、実施例により本発明を具体的に示す
が、本発明は下記実施例に限定されるものではない。EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited to the following examples.
【0026】図1は、本発明の一実施例に係る自己診断
機能付きpH測定装置を示す。なお、図1において、図
2のpH測定装置と同一構成の部分には同一参照符号を
付してその説明を省略する。FIG. 1 shows a pH measuring device with a self-diagnosis function according to an embodiment of the present invention. In FIG. 1, the same components as those of the pH measuring device of FIG. 2 are designated by the same reference numerals and the description thereof will be omitted.
【0027】本例の自己診断機能付きpH測定装置30
は、内部液貯留容器12に比較電極の内部液圧力検知手
段32及び比較電極の内部液量検知手段34が設置され
ているとともに、前記両検知手段32、34と接続した
警報信号発生手段36が設けられている。内部液圧力検
知手段32としてはマイクロスイッチ接点方式のスイッ
チ内蔵圧力計が使用され、内部液量検知手段34として
はフロート式レベルスイッチが使用されている。PH measuring apparatus 30 with self-diagnosis function of this embodiment
In the internal liquid storage container 12, the internal liquid pressure detecting means 32 of the reference electrode and the internal liquid amount detecting means 34 of the reference electrode are installed, and the alarm signal generating means 36 connected to the both detecting means 32, 34 is provided. It is provided. A micro switch contact type switch built-in pressure gauge is used as the internal liquid pressure detecting means 32, and a float type level switch is used as the internal liquid amount detecting means 34.
【0028】本例の自己診断機能付きpH測定装置30
は、内部液圧力検知手段32で検知した比較電極の内部
液圧力が設定値以下になったとき及び内部液量検知手段
34で検知した比較電極の内部液量が設定値以下になっ
たときにそれぞれ警報信号発生手段36から警報信号が
発生される。これにより、測定装置の管理者は、内部液
加圧圧力の設定値からのずれや内部液の流出のしすぎを
チェックすることができる。PH measuring device 30 with self-diagnosis function of this embodiment
Is when the internal liquid pressure of the reference electrode detected by the internal liquid pressure detection means 32 is less than or equal to the set value and when the internal liquid pressure of the reference electrode detected by the internal liquid amount detection means 34 is less than or equal to the set value. An alarm signal is generated from the alarm signal generating means 36, respectively. Thereby, the administrator of the measuring device can check the deviation of the internal liquid pressurization pressure from the set value and the excessive outflow of the internal liquid.
【0029】[0029]
【発明の効果】以上説明したように、本発明の自己診断
機能付きpH測定装置によれば、圧力が変動する被検液
のpH測定を行う場合でも、内部液加圧圧力の設定値か
らのずれに即応することができるとともに、被検液の圧
力が大きく低下したときに内部液の流出のしすぎをチェ
ックすることができ、簡便な手段で内部液の保守管理を
適正に行うことができる。また、本発明のpH測定方法
によれば、圧力が変動する被検液のpH測定を安定して
行うことができる。As described above, according to the pH measuring device with the self-diagnosis function of the present invention, even when the pH of the test liquid whose pressure changes is measured, In addition to being able to respond immediately to the deviation, it is possible to check if the internal liquid has flowed out too much when the pressure of the test liquid has dropped significantly, and it is possible to properly perform maintenance management of the internal liquid with a simple means. . Further, according to the pH measuring method of the present invention, it is possible to stably measure the pH of the test liquid in which the pressure fluctuates.
【図面の簡単な説明】[Brief description of drawings]
【図1】図1は本発明の一実施例に係る自己診断機能付
きpH測定装置を示す概略図である。FIG. 1 is a schematic view showing a pH measuring device with a self-diagnosis function according to an embodiment of the present invention.
【図2】図2は被検液のpH測定時おける圧力変動の一
例を示すグラフである。FIG. 2 is a graph showing an example of pressure fluctuation during pH measurement of a test liquid.
【図3】図3は被検液のpH測定時おける圧力変動の一
例を示すグラフである。FIG. 3 is a graph showing an example of pressure fluctuation during pH measurement of a test liquid.
【図4】図4は被検液のpH測定時おける圧力変動の一
例を示すグラフである。FIG. 4 is a graph showing an example of pressure fluctuation during pH measurement of a test liquid.
【図5】図5はガラス電極及び加圧内部液式比較電極を
備えた従来のpH測定装置の一例を示す概略図である。FIG. 5 is a schematic view showing an example of a conventional pH measuring device equipped with a glass electrode and a pressurized internal liquid type reference electrode.
4 ガラス電極 6 加圧内部液式比較電極 8 液絡部 10 内部液 12 内部液貯留容器 16 補充用内部液 20 加圧手段 30 自己診断機能付きpH測定装置 32 内部液圧力検知手段 34 内部液量検知手段 36 警報信号発生手段 4 glass electrode 6 pressurized internal liquid type reference electrode 8 liquid junction 10 internal liquid 12 internal liquid storage container 16 replenishing internal liquid 20 pressurizing means 30 pH measuring device with self-diagnosis function 32 internal liquid pressure detecting means 34 internal liquid volume Detecting means 36 Alarm signal generating means
───────────────────────────────────────────────────── フロントページの続き (72)発明者 浅野 泰一 東京都武蔵野市吉祥寺北町4丁目13番14号 電気化学計器株式会社内 (72)発明者 伊東 哲 東京都武蔵野市吉祥寺北町4丁目13番14号 電気化学計器株式会社内 (72)発明者 水野 雅夫 東京都武蔵野市吉祥寺北町4丁目13番14号 電気化学計器株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Taiichi Asano 4-13-14 Kitacho, Kichijoji, Musashino-shi, Tokyo Inside Electrochemical Instruments Co., Ltd. (72) Inventor Satoshi Ito 4-chome, Kichijoji, Musashino-shi, Tokyo No. 14 Electrochemical Instrument Co., Ltd. (72) Inventor Masao Mizuno 4-13-14, Kichijoji Kitamachi, Musashino City, Tokyo Electrochemical Instrument Co., Ltd.
Claims (2)
備えたpH測定装置において、前記比較電極の内部液圧
力検知手段と、前記比較電極の内部液量検知手段と、前
記両検知手段と接続した警報信号発生手段とを具備する
ことを特徴とする自己診断機能付きpH測定装置。1. A pH measuring device comprising a glass electrode and a pressurized internal liquid type reference electrode, wherein an internal liquid pressure detecting means of the comparing electrode, an internal liquid amount detecting means of the comparing electrode, and both detecting means. A pH measuring device with a self-diagnosis function, comprising a connected alarm signal generating means.
H測定を請求項1記載の自己診断機能付きpH測定装置
により行うことを特徴とするpH測定方法。2. The p of a test liquid whose pressure fluctuates during pH measurement.
A pH measuring method, wherein H measurement is performed by the pH measuring device with a self-diagnosis function according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26815593A JPH07103932A (en) | 1993-09-30 | 1993-09-30 | Measuring apparatus for ph provided with self-diagnostic function and measuring method for ph using the apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26815593A JPH07103932A (en) | 1993-09-30 | 1993-09-30 | Measuring apparatus for ph provided with self-diagnostic function and measuring method for ph using the apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07103932A true JPH07103932A (en) | 1995-04-21 |
Family
ID=17454668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26815593A Pending JPH07103932A (en) | 1993-09-30 | 1993-09-30 | Measuring apparatus for ph provided with self-diagnostic function and measuring method for ph using the apparatus |
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JP (1) | JPH07103932A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11768172B2 (en) | 2021-05-31 | 2023-09-26 | Panasonic Intellectual Property Management Co., Ltd. | Inline pH sensor |
-
1993
- 1993-09-30 JP JP26815593A patent/JPH07103932A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11768172B2 (en) | 2021-05-31 | 2023-09-26 | Panasonic Intellectual Property Management Co., Ltd. | Inline pH sensor |
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