RU96107251A - BUILT-IN FIELD TRANSMITTER TEST EQUIPMENT - Google Patents

BUILT-IN FIELD TRANSMITTER TEST EQUIPMENT

Info

Publication number
RU96107251A
RU96107251A RU96107251/09A RU96107251A RU96107251A RU 96107251 A RU96107251 A RU 96107251A RU 96107251/09 A RU96107251/09 A RU 96107251/09A RU 96107251 A RU96107251 A RU 96107251A RU 96107251 A RU96107251 A RU 96107251A
Authority
RU
Russia
Prior art keywords
current
loop
potential
measuring
circuit
Prior art date
Application number
RU96107251/09A
Other languages
Russian (ru)
Other versions
RU2155350C2 (en
Inventor
Фегель Кевин
Б.Ланктот Джейн
Л.Вестфилд Брайан
Original Assignee
Роузмаунт Инк.
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
Priority claimed from US08/121,064 external-priority patent/US5481200A/en
Application filed by Роузмаунт Инк. filed Critical Роузмаунт Инк.
Publication of RU96107251A publication Critical patent/RU96107251A/en
Application granted granted Critical
Publication of RU2155350C2 publication Critical patent/RU2155350C2/en

Links

Claims (5)

1. Измерительный передатчик с двумя зажимами, соединенными с двухпроводной цепью, при этом цепь имеет источник питания и контурное сопротивление, причем контурный ток проходит через передатчик, источник питания и контурное сопротивление, при этом трансмиттер включает: средство для установки контурного тока на первый и второй токовые уровни; средство для измерения потенциала между зажимами на двух токовых уровнях, и микропроцессорное средство для разделения измеренного потенциала путем изменения токового уровня для получения значения контурного сопротивления.1. The measuring transmitter with two clamps connected to a two-wire circuit, the circuit has a power source and circuit resistance, and the loop current passes through the transmitter, power source and loop resistance, the transmitter includes: means for setting the loop current to the first and second current levels; means for measuring the potential between the clamps at two current levels, and microprocessor means for separating the measured potential by changing the current level to obtain the value of the circuit resistance. 2. Измерительный передатчик по п.1, в котором микропроцессор включает в себя средство для расчета потенциала на источнике питания на основе контурного сопротивления и одного из токовых уровней. 2. The measuring transmitter according to claim 1, in which the microprocessor includes means for calculating the potential at the power source based on the loop resistance and one of the current levels. 3. Передатчик с двумя зажимами, соединенными с двухпроводным контуром управления технологическим процессом, содержащей средство для измерения проходящего через контур тока и выработки токового контурного выходного сигнала; средство для измерения потенциала между двумя зажимами и выработки выходного сигнала потенциала на зажимах; и микропроцессор, включающий в себя вход, соединенный с токовым контурным выходным сигналом, вход, соединенный с выходным сигналом потенциала на зажимах, и выход, относящийся к контурному сопротивлению. 3. A transmitter with two clamps connected to a two-wire process control loop comprising means for measuring a current passing through the loop and generating a current loop output signal; means for measuring the potential between the two terminals and generating a potential output signal at the terminals; and a microprocessor including an input connected to a current loop output signal, an input connected to a potential output signal at the terminals, and an output related to the loop resistance. 4. Способ измерения контурного сопротивления двухпроводного тока и потенциала питания с передатчиком, имеющим два зажима, соединенные с двухпроводной цепью, содержащий: установку контурного тока через двухпроводную цепь на первый токовый уровень; измерение первого потенциала между двумя зажимами; установку контурного тока через двухпроводную цепь на второй токовый уровень; измерение второго потенциала между двумя зажимами; и деление разности между первым и вторым потенциалами на разность между первым и вторым токовыми уровнями для определения контурного сопротивления. 4. A method for measuring the loop resistance of a two-wire current and a power potential with a transmitter having two clamps connected to a two-wire circuit, comprising: setting the loop current through a two-wire circuit to a first current level; measuring the first potential between two clamps; setting the loop current through a two-wire circuit to a second current level; measuring a second potential between two clamps; and dividing the difference between the first and second potentials by the difference between the first and second current levels to determine the circuit resistance. 5. Способ по п.4, включающий в себя вычисление потенциала источника питания как функции контурного сопротивления и одного из токовых уровней. 5. The method according to claim 4, including calculating the potential of the power source as a function of circuit resistance and one of the current levels.
RU96107251/09A 1993-09-15 1994-08-15 Built-in testing equipment of field transmitter RU2155350C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/121,064 1993-09-15
US08/121,064 US5481200A (en) 1993-09-15 1993-09-15 Field transmitter built-in test equipment

Publications (2)

Publication Number Publication Date
RU96107251A true RU96107251A (en) 1998-07-27
RU2155350C2 RU2155350C2 (en) 2000-08-27

Family

ID=22394266

Family Applications (1)

Application Number Title Priority Date Filing Date
RU96107251/09A RU2155350C2 (en) 1993-09-15 1994-08-15 Built-in testing equipment of field transmitter

Country Status (10)

Country Link
US (1) US5481200A (en)
EP (1) EP0719417B1 (en)
CN (1) CN1052306C (en)
AU (1) AU678596B2 (en)
CA (1) CA2169722A1 (en)
CZ (1) CZ71796A3 (en)
DE (1) DE69429008T2 (en)
RU (1) RU2155350C2 (en)
SG (1) SG45362A1 (en)
WO (1) WO1995008123A1 (en)

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