Sensor Trim - Emerson Rosemount 3051 Reference Manual

Reference Manual
00809-0100-4001, Rev JA
4.5.3

Sensor trim

Note
Use a pressure input source that is at least four times more accurate than the transmitter, and
allow the input pressure to stabilize for ten seconds before entering any values.
Field communicator
Traditional 4-20 mA Fast Keys
Traditional 1-5 Vdc Fast Keys
Device Dashboard Fast Keys
To calibrate the sensor with a Field Communicator using the sensor trim function, perform the
following procedure:
1.
2.
3.
Examples:
Calibration: 0 to 100" H
Calibration: -100 to 0" H
Calibration: -100 to 100" H
upper trim = -100 or 100
Note
Select pressure input values so that lower and upper values are equal to or outside the 4 and
20 mA (1 and 5 Vdc) points. Do not attempt to obtain reverse output by reversing the high and
low points. This can be done by going to
transmitter allows approximately five percent deviation.
4.
5.
Operation and maintenance
Assemble and power the entire calibration system including a transmitter, Field
Communicator, power supply, pressure input source, and readout device.
From the HOME screen, enter the fast key sequence under "Sensor Trim."
Select 2: Lower sensor trim. The lower sensor trim value should be the sensor trim point
that is closest to zero.
O - lower trim = 0, upper trim = 100
2
O - lower trim = 0, upper trim = -100
2
O - lower trim = -100 or 100,
2
Follow the commands provided by the Field Communicator to complete the
adjustment of the lower value.
Repeat the procedure for the upper value, replacing 2: Lower sensor trim with 3: Upper
sensor trim in Step 3.
Section 4: Operation and Maintenance
"Rerange" on page 53 of
November 2012
1, 2, 3, 3
1, 2, 3, 3
3, 4, 1
Section 3: Configuration. The
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