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Rosemount transmitterWhat are the ways to fine tune
1、 Zero point adjustment: When making adjustments, we need to turn off the transmitter protection setting. The transmitter protection setting is usually a red switch in front of the meter head. The status has ON and OFF. If the protection function is enabled, fine-tuning will not be successful.
Operation steps: Firstly, the transmitter should be vented to the atmosphere and connected to the measuring circuit and handheld device. Then go to Device Settings ->Maintenance and Diagnosis ->Inspection ->Sensor Fine Adjustment ->Zero Point Fine Adjustment. Finally, follow the instructions on the handheld device to perform zero point adjustment. It should be noted that the transmitter must be within 3% of zero as the basis for zero adjustment.
2、 Digital and Analog Fine Adjustment (Output Fine Adjustment): In the handheld menu, go to Device Settings ->Diagnosis and Maintenance ->Inspection ->Output Fine Adjustment ->Digital/Analog Fine Adjustment. Set the 'control loop' to manual mode.
Pay attention to the positive and negative terminal wiring, then select OK. Finally, set the output of the on-site device to 4ma, and the transmitter output to 4ma. Then record the actual value of the reference table, enter the value in the 'Input Instrument Value' prompt, and observe whether the output of the handheld controller is consistent with the reference table value. If they are consistent, change 4ma to 20ma and compare the reference value with the output value of the handheld device. Until it is accurate. If there is inconsistency, continue to input the reference value and check if it matches the output of the handheld device. The final step is to set the 'control loop' to automatic control and complete all operations.
3、 Analog digital trim (sensor trim): the main work to be done is zero trim and * trim. *Fine tuning requires an accuracy of three times that of the transmitter. In the handheld menu: Equipment Settings ->Diagnosis and Maintenance ->Inspection ->Lower limit transmitter fine tuning, perform the operation. If the accuracy of the transmitter is 0.25, then the lower limit fine adjustment value is 0.06.
