Reference Manual

30
Reference Manual
00809-0100-4045, Rev AB
Operation and Maintenance
March 2016
Operation and Maintenance
4.3.3 Sensor trim
When performing a sensor trim, both the upper and lower limits can be trimmed. If both
upper and lower trims are to be performed, the lower trim must be done before the upper
trim.
Note
Use a pressure input source at least four times more accurate than the device, and allow the
input pressure to stabilize for 60 seconds before entering any values.
From the HOME screen, enter the Fast Key sequence
1. Assemble and power the entire calibration system including the gauge, Field
Communicator or AMS Device Manager, power supply, pressure input source, and
readout device.
2. From the Home screen, select 2: Configure.
3. Select 2: Advanced Setup.
4. Select 1: Measurements.
5. Select 1: Dial/Pressure.
6. Select 1: Verify/Calibrate.
Note
Select pressure points so that lower and upper values are equal to or outside the expected
process operation range.
7. Follow the on-screen instructions to complete the adjustment of the lower value.
8. Repeat the procedure for the upper value.
Performing a digital zero trim
Devices are factory-calibrated. Once installed, it is recommended to perform this step to
eliminate potential error caused by mounting position or static pressure. Instructions for
using a Field Communicator are listed below.
1. Vent the device.
2. Connect the Field Communicator.
3. From the HOME screen, enter the HART
®
Fast Key sequence.
4. Follow the commands to perform the procedure.
Fast Keys
2, 2, 1, 1, 1
Fast Keys
2, 1, 1