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Reference Manual
00809-0100-4102, Rev AA
Section 5: Operation and Maintenance
May 2013
Operation and maintenance
Table 5-1. Recommended Calibration Tasks
Note:
For 2051CA, 2051TA range 0 and range 5 devices, an accurate absolute pressure source is
required.
5.3.1 Determining necessary Sensor Trims
Bench calibrations allow for calibrating the instrument for its desired range of operation.
Straight forward connections to pressure source allow for a full calibration at the planned
operating points. Exercising the Transmitter over the desired pressure range allows for
verification of the output value. “Sensor Trim” on page 68 discusses how the trim operations
change the calibration. It is possible to degrade the performance of the transmitter if a trim is
done improperly or with inaccurate equipment. The transmitter can be set back to factory
settings using the Recall Factory Trim command in “Recall Factory Trim—Sensor Trim” on
page 70.
Absolute pressure transmitters (2051CA and 2051TA) are calibrated at the factory.
Trimming adjusts the position of the factory characterization curve. It is possible to
degrade performance of the transmitter if any trim is done improperly or with inaccurate
equipment.
Transmitter Bench Calibration Tasks Field Calibration Tasks
2051CD
2051CG
2051L
2051TG, Range
1-4
1. Set output configuration parameters:
a. Set the range points.
b. Set the output units.
c. Set the output type.
2. Optional: Perform a sensor trim.
(Accurate pressure source required.)
1. Reconfigure parameters if
necessary.
2. Zero trim the transmitter to
compensate for mounting effects
or static pressure effects.
2051CA
2051TA
2051TG, Range 5
1. Set output configuration parameters:
a. Set the range points.
b. Set the output units.
c. Set the output type.
2. Optional: Perform a sensor trim if
equipment available (accurate
absolute pressure source required),
otherwise perform the low trim value
section of the sensor trim procedure.
1. Reconfigure parameters if
necessary.
2. Perform low trim value section of
the sensor trim procedure to
correct for mounting position
effects.