Fluke HART 744 - Manual (Page 25)

Documenting Process Calibrator HART Mode
Calibrating a Supported HART Transmitter
17
Output Trim
An Output Trim adjusts the tranmitter’s Output stage. You
can perform an Output Trim on both generic and
supported transmitters.
To perform an Output Trim:
1. From the Active Device screen Press the Service
softkey, followed by Output Trim .
pe16s.bmp
2. Press Fetch to load the mA value being measured by
the calibrator into the dialog box.
3. Press Send to trim the low analog output point.
4. To trim the high analog output point, repeat steps 2
and 3, following the prompts on the display.
Sensor Trim
You can only perform a Sensor Trim on a supported
transmitter. A Sensor Trim adjusts the Input stage of a
HART transmitter. If your application does not use the
Output stage of the transmitter, Sensor Trim is the only
adjustment you need to make.
A Sensor Trim may involve one or more trim points. This is
controlled by the transmitter’s software. You can only
perform a Sensor Trim on a supported transmitter.
To perform a Sensor Trim, proceed as follows:
1. From the Active Device screen, press the Service
softkey, followed by Sensor Trim .
pe17s.bmp