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2271A
Operators Manual
60
Trim Current Output
The Trim Current Output commands can adjust the transmitter’s DAC (digital to
analog converter) at the 4 mA and 20 mA points.
To Trim Current Output:
1. Select (HART Tasks) on the HART Menu.
2. Select Trim Current Output from the menu:
3. Use Averaging Measurement and Averaging Time to average the
measurement value applied to the trim.
4. Push (Start) trim
5. Push to start trimming the 4 mA point. The Send button is enabled
when measuring value is stable.
6. Push to send the 4 mA trimming value to UUT.
7. After 4 mA trimming is complete, push to repeat the 4 mA trimming if
necessary. Or push to change to trim 20 mA.
8. Push to start trimming the 20 mA point. The Send button is enabled
when measuring value is stable.
9. Press to send 20 mA trimming value to UUT.
10. After 20 mA trimming is complete, push to repeat the 20 mA trimming if
necessary. Or push to exit.
Trim by Re-ranging
You can adjust the transmitter by re-ranging the upper and lower range values.
This type of trim is typical for analog transmitters and smart transmitters used in
analog processes. This trim function alters the transmitter’s interpretation of the
input signal.
To trim by re-ranging:
1. Push (HART Tasks) on the HART Menu.
2. Select Trim by Re-ranging.
3. In the Trim by Re-ranging menu:
Range: Upper / Lower / Both - use to select a point or both to trim.
4mA: Only trim 4 mA
20mA: Only trim 20 mA
Both: Trim both 4 mA and 20 mA
LRV: Configure the lower range value of transmitter
Note
Changing the LRV affects the URV. If the LRV should be tested
against ATM, set “Use ATM” checkbox to “YES”. When it sets to
“YES”, the LRV is non-editable.
1.888.610.7664 sales@GlobalTestSupply.com
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