
53
Reference Manual
00809-0100-4100, Rev AA
Section 5: Operation and Maintenance
June 2012
Sensor trim is a two-point sensor calibration where two end-point pressures are applied, and all
output is linearized between them. Always adjust the low trim value first to establish the correct
offset. Adjustment of the high trim value provides a slope correction to the characterization
curve based on the low trim value. The trim values allow you to optimize performance over your
specified measuring range at the calibration temperature.
During a trim operation, the 3051 Wireless is placed in high power refresh mode, which
provides frequent pressure measurement updates and allows the configured damping to take
effect. This behavior allows for more accurate calibration of the device. When the device is in
high power refresh mode, the battery power supply will be depleted more rapidly.
5.2.2
Zero Trim
Note
The transmitter must be within three percent of true zero (zero-based) in order to calibrate with
zero trim function.
After properly venting the transmitter, calibrate the transmitter with the zero trim function:
1.
From the
Home
screen, select 2: Configure.
2.
Select 1: Guided Setup.
3.
Select 3: Zero Trim and follow the on-screen instruction to complete the zero trim
adjustment.
5.2.3
Sensor Trim
Note
Use a pressure input source that is at least three times more accurate than the transmitter, and
allow the input pressure to stabilize for ten seconds before entering any values.
To calibrate the transmitter using the sensor trim function:
1.
Assemble and power the entire calibration system including the 3051, Field
Communicator/AMS, power supply, pressure input source, and readout device.
2.
From the
Home
screen, select 3: Service Tools.
3.
Select 4: Routine Maintenance.
4.
Select 1: Sensor Calibration.
5.
Select 4: Lower Sensor Trim. The lower sensor trim value should be the sensor trim
point that is closest to zero.
6.
Follow the on-screen instructions to complete the adjustment of the lower value.
7.
Repeat the procedure for the upper value. Select 5: Upper Sensor Trim and follow the
on-screen instructions to complete the adjustment of the upper value.
Fast Keys
2, 1, 3
Fast Keys
3, 4, 1
Summary of Contents for Rosemount 2051 Wireless Series
Page 2: ......
Page 12: ...4 Reference Manual 00809 0100 4102 Rev AA Section 1 Introduction June 2012 Introduction ...
Page 32: ...24 Reference Manual 00809 0100 4102 Rev AA Section 2 Configuration June 2012 Configuration ...
Page 110: ......
Page 113: ......
Page 117: ...iv Reference Manual 00809 0100 4100 Rev AA Title Page June 2012 ...
Page 123: ...x Reference Manual 00809 0100 4100 Rev AA Table of Contents June 2012 Table of Contents ...
Page 167: ...44 Reference Manual 00809 0100 4100 Rev AA Section 3 Installation June 2012 Installation ...
Page 168: ...45 Reference Manual 00809 0100 4100 Rev AA Section 3 Installation June 2012 Installation ...
Page 169: ...46 Reference Manual 00809 0100 4100 Rev AA Section 3 Installation June 2012 Installation ...
Page 249: ......