FR2188869A5 - Automatic ph-value control - by converting linear ph-signal into hyperbolic final control signal - Google Patents

Automatic ph-value control - by converting linear ph-signal into hyperbolic final control signal

Info

Publication number
FR2188869A5
FR2188869A5 FR7219713A FR7219713A FR2188869A5 FR 2188869 A5 FR2188869 A5 FR 2188869A5 FR 7219713 A FR7219713 A FR 7219713A FR 7219713 A FR7219713 A FR 7219713A FR 2188869 A5 FR2188869 A5 FR 2188869A5
Authority
FR
France
Prior art keywords
signal
hyperbolic
automatic
relay
converting linear
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.)
Expired
Application number
FR7219713A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Uhde GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Uhde GmbH filed Critical Uhde GmbH
Priority to FR7219713A priority Critical patent/FR2188869A5/en
Application granted granted Critical
Publication of FR2188869A5 publication Critical patent/FR2188869A5/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D21/00—Control of chemical or physico-chemical variables, e.g. pH value
    • G05D21/02—Control of chemical or physico-chemical variables, e.g. pH value characterised by the use of electric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Feedback Control In General (AREA)

Abstract

The pH-value of a solution is automatically controlled by converting the linear pH-signal from a pH-meter into a hyperbolic curve, by passing it along two channels. One leads directly and the other through an inverting relay to a max. selection relay. The residual signal is stretched by a fixed-factor relay to the zero line and converted in another max. selection relay with an additional constant value input to a hyperbolic final control signal.
FR7219713A 1972-06-01 1972-06-01 Automatic ph-value control - by converting linear ph-signal into hyperbolic final control signal Expired FR2188869A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7219713A FR2188869A5 (en) 1972-06-01 1972-06-01 Automatic ph-value control - by converting linear ph-signal into hyperbolic final control signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7219713A FR2188869A5 (en) 1972-06-01 1972-06-01 Automatic ph-value control - by converting linear ph-signal into hyperbolic final control signal

Publications (1)

Publication Number Publication Date
FR2188869A5 true FR2188869A5 (en) 1974-01-18

Family

ID=9099521

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7219713A Expired FR2188869A5 (en) 1972-06-01 1972-06-01 Automatic ph-value control - by converting linear ph-signal into hyperbolic final control signal

Country Status (1)

Country Link
FR (1) FR2188869A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654228A1 (en) * 1989-11-08 1991-05-10 Eckardt Ag METHOD AND DEVICE FOR REGULATING A PARAMETER OF A PROCESS IN CASE OF NON SIGNIFICANT MEASUREMENT SIGNAL.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654228A1 (en) * 1989-11-08 1991-05-10 Eckardt Ag METHOD AND DEVICE FOR REGULATING A PARAMETER OF A PROCESS IN CASE OF NON SIGNIFICANT MEASUREMENT SIGNAL.

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Legal Events

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ST Notification of lapse