Recommended Calibration Tasks; Calibration Overview - Emerson Rosemount 2088 Reference Manual

Operation and Maintenance
April 2021
5.3

Recommended calibration tasks

CAUTION
Absolute pressure transmitters 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.
5.3.1 Field installation tasks
Procedure
1. Perform sensor zero/lower trim: Compensate for mounting pressure effects
2. Set/check basic configuration parameters.
5.3.2 Bench calibration tasks
Procedure
1. Perform optional 4–20 mA 1–5 Vdc output trim.
2. Perform a sensor trim.
5.4

Calibration overview

The pressure transmitter is an accurate instrument that is fully calibrated in the factory.
Field calibration is provided to the user to meet plant requirements or industry standards.
Complete calibration of the transmitter can be split into two tasks:
1. Sensor calibration
2. Analog output calibration
Sensor calibration allows the user to adjust the pressure (digital value) reported by the
transmitter to be equal to a pressure standard. The sensor calibration can adjust the
66
a) Refer to Rosemount 306 Manifold
properly either drain or vent valves.
a) Output units
b) Range points
c) Output type
d) Damping value
a) Zero/lower trim Troubleshooting tables
Refer to for manifold drain/vent valve operation instructions.
b) Optional full scale trim. Sets the span of the device and requires accurate
calibration equipment.
c) Set/check basic configuration parameters.
Rosemount 2088, 2090P, and 2090F Pressure Transmitter Reference Manual
Reference Manual
for manifold operation instructions to
using line pressure effect correction.
00809-0100-4108