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What are the various steps require to calibrate RTD temperature transmitter using a fluke 743B documenting process calibrator?

Field calibration or bench calibration of the RTD temperature transmitter if necessary.

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تم إضافة السؤال من قبل emmanuel sampson , ELECTRICAL&INSTRUMENTATION TECHNICIAN (E & I) , EROHDYN CONTROL SERVICES LIMITED
تاريخ النشر: 2014/02/07
Abdul-Rhman AL-Noubani
من قبل Abdul-Rhman AL-Noubani , Loss Prevention Engineer , Maaden

Hi , You can use this video

 

http://www.youtube.com/watch?v=6vfdcuFLObY

http://assets.fluke.com/AppNotes/ProcessTools/1560369_.pdf

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Materials required for Calibration:

1. A digital voltmeter of high accuracy

2. 24V DC power source

3. A 5 dial Resistance decade Box providing 100 Ohm steps.

 

NOW follow the steps to Calibrate.

1. Remove all the RTD lead connection if an RTD is already connected

2. Determine the RTD resistance at the desired base (0 Centigrade )  & full scale temperatures.

3. Now turn ON the power supply.

4. Set Resistance decade box to the resistance that corresponds to the desired base temperature. Adjust the Zero pot ( Potentiometer) of transmitter until output is 4mA.

5. Set Resistance decade box to the resistance that corresponds to the desired full scale temperature. Adjust the span pot ( Potentiometer) of transmitter until output is 20mA.

6. Repeat the above steps until the 4mA and 20mA readings are obtained without adjusting ZERO and SPAN potentiometers.

 

Done 

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