DE2645846A1 - DEVICE FOR AUTOMATIC, CONTINUOUS MEASUREMENT OF THE DENSITY - Google Patents
DEVICE FOR AUTOMATIC, CONTINUOUS MEASUREMENT OF THE DENSITYInfo
- Publication number
- DE2645846A1 DE2645846A1 DE19762645846 DE2645846A DE2645846A1 DE 2645846 A1 DE2645846 A1 DE 2645846A1 DE 19762645846 DE19762645846 DE 19762645846 DE 2645846 A DE2645846 A DE 2645846A DE 2645846 A1 DE2645846 A1 DE 2645846A1
- Authority
- DE
- Germany
- Prior art keywords
- temperature
- conductivity
- sample water
- sensitive element
- boric acid
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/045—Circuits
- G01N27/046—Circuits provided with temperature compensation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/22—Measuring resistance of fluids
Landscapes
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Sampling And Sample Adjustment (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
PATE N TANW ALTE R. SPLANEMANN dr. B. REITZNER J. RICHTER F. WERDERMANNPATE N TANW ALTE R. SPLANEMANN dr. B. REITZNER J. RICHTER F. WERDERMANN
DIPL.-INS. DIPL.-CHEM. DIPL.-ING. ' DIPL.-ING. DIPL.-INS. DIPL.-CHEM. DIPL.-ING. 'DIPL.-ING.
8OOO MÜNCHEN 2 yj ,, 8OOO MUNICH 2 yj ,,
IVT · 1 1 ■ rt τ 4-j Ta'13 II· IVT 1 1 ■ rt τ 4-j Ta '13 II
J)JlKKlSO CO., Ltd.. Telefon (089) 226207/226209J) JlKKlSO CO., Ltd .. Phone (089) 226207/226209
Telegramme.- Inventius MünchenTelegrams. - Inventius Munich
Tokyo / JapanTokyo / Japan
υ™» α**,, 3510-1-9751υ ™ »α ** ,, 3510-1-9751
Ihr Zeichen:Your sign:
PatentanmeldungPatent application
Gerät zur automatischen, kontinuierlichen Messung der BordichteDevice for the automatic, continuous measurement of the on-board density
Die Erfindung bezieht sich auf die Temperaturkorrektur bei der automatischen Kessung der Bordichte des Primärkühlwassers in einem Druckwasserreaktor.The invention relates to temperature correction in the automatic boiler density of the primary cooling water in a pressurized water reactor.
Im allgemeinen ist bei der automatischen Nessung der Bordichte die direkte Messung der elektrischen Leitfähigkeit schwierig, da das Borprobenwasser eine schwache Säure ähnlich einem Nichtelektrolyten ist. Um diesen Nachteil zu beseitigen, wird eine Mannitlösung aus mehrwertigem Alkohol mit dem Borsäurewasser gemischt, um eine Borsäure/Mannit-Lösung zu erhalten und dadurch für eine geeignete Messung die Leitfähigkeit zu erhöhen. Um außerdem eine genauere Messung der Bordichte des Borsäure-Probenwassers zu erhalten, ergibt sich die Notwendigkeit, einen Thermostatbehälter vorzusehen, um das Gemisch des Borsäure-Probenwassers und der Mannitlösung auf einer konstantenIn general, the automatic measurement of the boron density is the direct measurement of the electrical conductivity difficult as the boron sample water is a weak acid similar to a non-electrolyte. To overcome this disadvantage, a mannitol solution of polyhydric alcohol is mixed with the boric acid water mixed to obtain a boric acid / mannitol solution and thereby the conductivity for a suitable measurement to increase. In addition, in order to obtain a more precise measurement of the boron density of the boric acid sample water, there is a need to provide a thermostatic container to hold the mixture of boric acid sample water and the mannitol solution on a constant
709817/0941709817/0941
Konten: Deutsche Bank AG, München, Konto-Nr. 20/14 009 · Postscheck: München 600 60-807Accounts: Deutsche Bank AG, Munich, account no. 20/14 009 Postal check: Munich 600 60-807
•J·• J ·
Temperatur von etwa 25°C zu halten, ungeachtet dessen, daß es normalerweise einige Minuten dauert, bis die konstante Temperatur des Probenwassers erreicht ist. Daher führt die Messung der Leitfähigkeit aufeinanderfolgend durchlaufenden Borsäure-Probenwassers zu Fehlern infolge Änderungen der Temperatur.Maintain a temperature of about 25 ° C, notwithstanding that it usually takes a few minutes for the constant temperature of the sample water is reached. Therefore the measurement of the conductivity is carried out consecutively boric acid sample water passing through leads to errors due to changes in temperature.
Nach eingehenden Untersuchungen wurde ein neues Gerät zur Messung der Bordichte durch Bestimmung der Leitfähigkeit eines Gemisches aus Borsäure-Probenwasser und einer Mannitlösung geschaffen, bei dem ein temperaturempfindliches Element aus einem Metalldraht, das eine hohe Empfindlichkeit gegenüber der Temperatur einer Flüssigkeit hat, an einer zur Messung der Leitfähigkeit geeigneten Stelle in einen Leitfähigkeitsmeßbehälter getaucht ist, um die Änderung der Temperatur der Flüssigkeit in Form der Änderung des elektrischen Widerstandes zu ermitteln, wodurch Fehler bei Messungen der Leitfähigkeit infolge von Änderungen der Temperatur korrigiert werden können. Die Leitfähigkeit des Probenwassers,das aus der Borsäure/Mannit-Lösung besteht, hat einen negativen Temperaturkoeffizienten vonAfter extensive investigations, a new device was used to measure the boron density by determining the conductivity a mixture of boric acid sample water and a mannitol solution created in which a temperature-sensitive Element made of a metal wire, which has a high sensitivity to the temperature of a Has liquid in a conductivity measuring container at a suitable point for measuring conductivity is immersed to the change in temperature of the liquid in the form of the change in electrical resistance Determine what causes errors in conductivity measurements as a result of changes in temperature can be corrected. The conductivity of the sample water, which consists of the boric acid / mannitol solution, has a negative temperature coefficient of
0,36 % pro 1°C in dem Temperaturbereich von 20 bis0.36% per 1 ° C in the temperature range from 20 to
o Metallfaden von einem o metal thread from one
40 C, so daß ein/positiven Temperaturkoeffizienten verwendet werden kann, der mit einem Temperaturkorrekturkreis des Leitfähigkeitsmeßkreises zur geeigneten Messung der Leitfähigkeit bei korrigierten Temperaturen verbunden ist.40 C, so a / positive temperature coefficient is used with a temperature correction circuit of the conductivity measuring circuit for suitable measurement the conductivity at corrected temperatures.
Der Erfindung liegt somit die Aufgabe zugrunde, ein Gerät zur automatischen Bordichtemessung mit einer Temperaturkorrektureinrichtung zu schaffen.The invention is therefore based on the object of providing a device for automatic on-board density measurement with a To create temperature correction device.
Gelöst wird diese Aufgabe bei einem Gerät zur automatischen, kontinuierlichen Messung der Bordichte durch Bestimmung der Leitfähigkeit eines Gemisches aus einem Borsäure- Protrertwasserund einer Mannitlösung gemäß derThis task is solved with a device for automatic, continuous measurement of the boron density by determining the conductivity of a mixture of one Boric acid protrertwasser and a mannitol solution according to
709817/0941709817/0941
Erfindung durch ein temperatürempfindliches Element zur Bestimmung der Änderungen der Temperatur des durchlaufenden Probenwassers in Form eines Gemisches des Borsäure-Probenwassers und der Mannitlösung, wobei das temperaturempfindliche Element in einen Meßkreis eines Instrumentes zur Messung der elektrischen Leitfähigkeit geschaltet ist, um bei der Messung der Leitfähigkeit durch Änderungen der Temperatur des durchlaufenden Probenwassers verursachte Fehler zu korrigieren.Invention by a temperature-sensitive element for Determination of the changes in the temperature of the sample water flowing through in the form of a mixture of the boric acid sample water and the mannitol solution, the temperature-sensitive element in a measuring circuit of a Instrument for measuring electrical conductivity is switched to measure conductivity by changing the temperature of the passing through Correct errors caused by the sample water.
Die Erfindung wird nachstehend anhand der beiliegenden Zeichnung, die eine schematische Darstellung des Bordichte-Meßgerätes gemäß der Erfindung zeigt, beispielsweise erläutert.The invention is explained below with reference to the accompanying drawing, which is a schematic representation of the boron density measuring device shows according to the invention, for example explained.
In dem Meßbehälter 10 ist eine Leitfähigkeitsmeßelektrode 12 angeordnet, die über eine Leitung mit einem Meßkreis 14 verbunden ist, der einen Verstärker (nicht gezeigt) zur Bestimmung der Leitfähigkeit im Verhältnis zu der Bordichte des Borsäure-Probenwassers enthält. Die auf diese Weise in dem Meßkreis 14 bestimmte Leitfähigkeit wird von einem Meßinstrument 16, das an den Ausgang des Meßkreises 14 angeschlossen ist, in Form der Leitfähigkeit oder der Bordichte angezeigt.In the measuring container 10, a conductivity measuring electrode 12 is arranged, which is connected to a measuring circuit via a line 14 is connected to an amplifier (not shown) for determining the conductivity in relation to the Contains boron density of the boric acid sample water. The conductivity determined in this way in the measuring circuit 14 is from a measuring instrument 16, which is connected to the output of the measuring circuit 14, in the form of conductivity or the on-board density displayed.
In dem Gerät gemäß der Erfindung ist ein temperaturempfindliches Element 18, das einen positiven Temperaturkoeffizienten hat, z.B. aus Kupferdraht, Platindraht, Nickeldraht oder dergleichen hergestellt und zur Aufnahme durch eine Schutzhülse relativ geringer Dicke als Spule ausgebildet, um eine hohe Temperaturempfindlichkeit zu erhalten. Das temperaturempfindliche Element 18 mit der Schutzhülse ist in dem Meßbehälter 10 angeordnet, um die Änderung der Temperatur in Form der Änderung der Leitfähigkeit zu ermitteln, und damit korrigiert die Änderung des Widerstandes Fehler in der Leitfähigkeit^In the device according to the invention there is a temperature sensitive element 18 which has a positive temperature coefficient has, e.g. made of copper wire, platinum wire, Nickel wire or the like produced and for inclusion by a protective sleeve of relatively small thickness as a coil designed to obtain a high temperature sensitivity. The temperature-sensitive element 18 with the Protective sleeve is arranged in the measuring container 10 to the change in temperature in the form of the change in Determine conductivity, and thus the change in resistance corrects errors in conductivity ^
709817/0941709817/0941
-S*-S *
die durch Änderung der Temperatur auftreten können. Bei dem Beispiel ist das temperaturempfindliche Element 18 an den Leitfähigkeitsmeßkreis 14 angeschlossen, der mit der Leitfähigkeitsmeßelektrode 12 verbunden ist, um dadurch einen Korrekturkreis zu schaffen, der eine automatische Messung der Leitfähigkeit des Borsäure-Probenwassers ermöglicht.which can occur due to a change in temperature. In the example, the temperature sensitive element is 18 connected to the conductivity measuring circuit 14, which is connected to the conductivity measuring electrode 12 to thereby creating a correction circuit that automatically measures the conductivity of the boric acid sample water enables.
Wie zuvor beschrieben wurde, wird gemäß der Erfindung der Meßfehler, der infolge der Änderung der Temperatur des Probenwassers auftreten kann, das kontinuierlich zugeführt wird, automatisch korrigiert, um eine genaue Messung der Bordichte bei geeigneter Beobachtung durch eine Bedienungsperson zu erreichen.As described above, according to the invention, the measurement error due to the change in temperature of the sample water that is continuously supplied, automatically corrected to provide an accurate To achieve measurement of the on-board density with suitable observation by an operator.
70981 7/094170981 7/0941
LeerseiteBlank page
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12452975A JPS5249092A (en) | 1975-10-16 | 1975-10-16 | Improvement in apparatus for automatic measurement of boron concentrat ion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2645846A1 true DE2645846A1 (en) | 1977-04-28 |
Family
ID=14887721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19762645846 Withdrawn DE2645846A1 (en) | 1975-10-16 | 1976-10-11 | DEVICE FOR AUTOMATIC, CONTINUOUS MEASUREMENT OF THE DENSITY |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5249092A (en) |
| CH (1) | CH609778A5 (en) |
| DE (1) | DE2645846A1 (en) |
| GB (1) | GB1556063A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT392542B (en) * | 1988-05-17 | 1991-04-25 | Justin Reinhardt Dr | Equipment for determining the separation speed of suspended, flocked or dispersed substances or substances dissolved colloidally in a liquid, especially water |
| WO1998018136A1 (en) * | 1996-10-21 | 1998-04-30 | Siemens Aktiengesellschaft | Measurement device for determining boron concentration |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244500C (en) * | 2000-08-07 | 2006-03-08 | 西弗斯仪器公司 | Low-level boron detection and measurement |
| CN112225291A (en) * | 2020-08-11 | 2021-01-15 | 华电电力科学研究院有限公司 | Generator inner cooling water treatment device based on separated bed EDI and control method |
-
1975
- 1975-10-16 JP JP12452975A patent/JPS5249092A/en active Pending
-
1976
- 1976-09-23 GB GB3941176A patent/GB1556063A/en not_active Expired
- 1976-10-11 CH CH1283576A patent/CH609778A5/en not_active IP Right Cessation
- 1976-10-11 DE DE19762645846 patent/DE2645846A1/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT392542B (en) * | 1988-05-17 | 1991-04-25 | Justin Reinhardt Dr | Equipment for determining the separation speed of suspended, flocked or dispersed substances or substances dissolved colloidally in a liquid, especially water |
| WO1998018136A1 (en) * | 1996-10-21 | 1998-04-30 | Siemens Aktiengesellschaft | Measurement device for determining boron concentration |
| US6345080B1 (en) | 1996-10-21 | 2002-02-05 | Siemens Aktiengesellschaft | Measurement device for determining boron concentration |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5249092A (en) | 1977-04-19 |
| CH609778A5 (en) | 1979-03-15 |
| GB1556063A (en) | 1979-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2645846A1 (en) | DEVICE FOR AUTOMATIC, CONTINUOUS MEASUREMENT OF THE DENSITY | |
| DE2210532A1 (en) | Device for measuring the activity of silver ions | |
| DE1170677B (en) | Standard reference electrode for pH measurement | |
| DE668448C (en) | Method and device for direct measurement of the content of solutions of depolarizing components | |
| DE1234416B (en) | Measuring electrode for determining the hydrogen ion concentration | |
| DE880354C (en) | Thermal ammeter with room temperature compensation | |
| AT63993B (en) | Thermoelectric temperature measuring device. | |
| DE1058149B (en) | Device and method for determining the short-circuit current to be expected at a point in an electrical network | |
| DE208453C (en) | ||
| DE309225C (en) | ||
| DE707449C (en) | Arrangement for carrying out the method for the electrometric measurement of the oxygen content of a solution | |
| DE910193C (en) | Method for producing a rectifying, in particular light-sensitive, semiconductor element | |
| DE882315C (en) | Method for the determination of chemically oxidizable or reducible substances, especially oxygen in water, by measuring depolarization | |
| DE951754C (en) | Device for measuring the quotient of several measured values that can be set by resistance sensors to determine the boiler efficiency | |
| DE628103C (en) | Method and device for the araeometric determination of the specific gravity of liquids | |
| DE510952C (en) | Arrangement for determining the calorific value of gases | |
| DE716596C (en) | Device for I? Measurement | |
| DE827725C (en) | Method and device for determining the alcohol content | |
| DE889033C (en) | Temperature correction for conductivity measurements of liquid electrolytes | |
| DE281069C (en) | ||
| DE626749C (en) | Solar compass | |
| DE733249C (en) | Electrolyte counter | |
| DE712423C (en) | Liquid thermometer for measuring the temperature of substances and body parts during the action of high-frequency, especially short-wave electrical vibrations | |
| DE1847605U (en) | MACHINE GLASS THERMOMETER. | |
| AT136517B (en) | Device and electrode for hydrogen ion concentration measurement and electrometric titration. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OD | Request for examination | ||
| 8130 | Withdrawal |