Rosemount 2088 - Trim the Analog Output; Performing Digital-To-Analog Trim (4-20 Ma; 1-5 V Output Trim)

60
Reference Manual
00809-0100-4108, Rev CA
Operation and maintenance
March 2017
Operation and maintenance
Figure 5-4. Recall Factory Trim - Sensor Trim With Local Operator Interface
5.6 Trim the analog output
The Analog Output Trim commands allow you to adjust the transmitter’s current output at
the 4 and 20 mA (1 – 5 Vdc) points to match the plant standards. This trim is performed
after the digital to analog conversion so only the 4–20 mA analog (1– 5 Vdc) signal will be
affected.
Figure 5-5 graphically shows the two ways the characterization curve is affected
when an analog output trim is performed.
Figure 5-5. Analog Output Trim Example
A. Before trim
B. After Trim
5.6.1 Performing digital-to-analog trim (4–20mA/ 1–5 V
output trim)
Note
If a resistor is added to the loop, ensure that the power supply is sufficient to power the
transmitter to a 20 mA output with additional loop resistance. Refer to “Power supply” on
page 46.
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A
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mA Output
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