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Documenting Process Calibrator HART Mode
Calibrating a Supported HART Transmitter
15
Calibrating a Supported HART
Transmitter
An “as found” and “as left” transmitter calibration has an
easier, more automated process for HART transmitters
than for analog transmitters. The calibration procedure is
the same as described in the
744 Users Manual
, except
for how you set up the calibration template, and how you
adjust the transmitter.
Note
If you are starting a calibration procedure from a
loaded Task, connect to the HART transmitter
first and establish communication before you
press
Task
in analog mode.
The following procedure assumes that you are familiar with
using a 740 Series Documenting Process Calibrator to
calibrate analog transmitters, and are not running a loaded
Task.
1. Make the appropriate measuring, sourcing, and HART
interface connections between the calibrator and the
transmitter, and press r to establish
communication.
2. Press r to switch to analog mode.
pe14s.bmp
3.
You are presented with a set of choices for analog
mode. Use the u and d keys to select one of the
measure/source choices. This is where you select
measure mA (analog output), or measure PV, which
does not involve the Output stage of the transmitter.
See Figure 3.
4. Press e.
5. Press the
As Found softkey.
6. Use the u and d keys followed by e to select
an instrument calibration procedure. You’ll see that
the calibration template is preloaded with appropriate
data. You can make changes to any item if you wish.