col·lab·o·ra·tion
kəˌlabəˈrāSHən/
noun
noun: collaboration; plural noun: collaborations

1.
the action of working with someone to produce or create something.

(Or in this case help each other)

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Thursday, October 3, 2013

Hart Communicator Test with RTD & Thermocouple

 Basic Concept of Hart PDF page 1024
http://www.ibiblio.org/kuphaldt/socratic/sinst/book/liii_1v36.pdf
(be willing to wait just a moment file size is large)

Ibid: PDF page 1435 about RTDs ,1443 about sensor connections
Ibid: PDF page 1447 about thermocouples, 1450 Types, 1469 about temp indicator connected to one.

Key Terms for Hart Communicator Test

Calibration
(1)A test during which known values of pressure are applied to the transducer and corresponding output readings are recorded under specified conditions.
(2)The matching of a pressure controller or indicator to the characteristics of a specific transducer. Most frequently done utilizing span resistor internal to the pressure transducer. Procedure is termed RCal.
(3)Adjustment of an instrument to standards of known accuracy and stability. (http://www.viatran.com/glossary#C)

Calibration
is used to perform such operations as
performing a sensor trim, D/A trim, and scaled D/A trim. (Hart 375 Manual PDF page 53)

Loop test
is used to set the output of the device at aspecified analog value, and may be used to test the integrity of the loop and the operation of indicators, recorders, or similar devices in the loop. (Hart 375 Manual PDF page 53)
Reranging
A procedure allowing the modifications of configuration values and parameters that change the transmitter 4-20 mA output settings in response to input pressure readings.(http://www.viatran.com/glossary#R)

Sensor Trim
A digital trim procedure which permits the adjustment of a digital process variable to a precisely known input pressure. Zero Trim and Full Trim are the two Sensor Trim functions.(http://www.viatran.com/glossary#S)


Questions:

  • What does the Dry Block Calibrator do?  ___ , ___ 
My Answer???:  Heat, Cool (Brief Reference see top of page 2)

  • How does the RTD calibrator Simulate the Temperature scale?


  • How does the thermocouple calibrator change the temperature scale setting? (Ex: betwxt K, J , T )  

My answer:  By pressing the store button

To change the temperature scale setting for the thermocouple calibrator, on the service manuel it says to use the dip switches, and to change t/c type to use the scroll button.


____ is always the negative ____

My answer: (concerning thermocouples)
the red , wire is always negative



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1 comment:

  1. UnknownOctober 6, 2013 at 12:58 PM

    To change the temperature scale setting for the thermocouple calibrator, on the service manuel it says to use the dip switches, and to change t/c type to use the scroll button.

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