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701/702
Users Manual
62
Calibrating a Process Instrument
When the calibrator is in simultaneous
MEASURE/SOURCE mode, a built-in calibration
routine is activated when you press the As Found
softkey. (As Found data are the test results showing
the condition of a transmitter before it is calibrated.)
Additionally, Model 702 runs procedures developed
using
PMLink
software. To use procedures from
PMLink
software, see the
PMLink
manual.
Generating “As Found” Test Data
The following example shows how to generate
as
found
data for a thermocouple temperature
transmitter. In this case the calibrator is simulating
the output of a thermocouple and measuring the
resulting current from the transmitter. Other
transmitters use this same method. Just go back to
MEASUREMENT or SOURCE mode and change the
operating parameters before you press As Found.
1. Connect the test leads to the instrument under
test as shown in Figure 21. The connections
simulate a thermocouple and measure the
corresponding output current.
2. If necessary, press M for MEASURE mode.
3. Press M.
4. Press M for SOURCE mode.
5. Press t.
6. Use the u and d keys to select the
thermocouple type, then press e.
7. Enter a source value, for example 100°, then
e.
8.
Press M for MEASURE/SOURCE mode. The
display changes as follows: