How to Calibrate Control Valve Which Instrument Is Used
4Then the balance will start automatic internal calibration. Hook up a HART communicator to the DVC6200 in parallel with a 4-20 mA loop across the loop terminals. Dvc 6010 Calibration On A Caldera Engineering Control Valve Youtube The zero value is the lower end of the range or LRV and the upper range value is the URV. . Connect a frequency generator at the input terminal of the transmitter. Hook up the Heart communicator and verify the parameters by referencing data sheet with tag number of the instrument to be calibrated. Depends on the type of control valve but the short answer is to use the actuator which is the link to the stem of the valve. It should remain closed at 40 mA and move slightly off its seat at 42 mA. When applying a 38 mA input signal to a normally closed valve the valve should be hard closed. For the calibration of a control valve a loop calibrator or a pressure calibrator can be used between 3-15psiChe...