Fluke 744 Fluke 744 Users Manual - Page 89

Transmitter Mode, thermocouple from the transmitter.

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Transmitter Mode You can set up the calibrator so that a varying input (MEASURE) controls the output (SOURCE), like a transmitter. This is called "Transmitter mode." In Transmitter mode, the calibrator can be temporarily used as a substitute for a defective or suspect transmitter. wWarning Do not use Transmitter mode in any environment that requires intrinsic safe equipment and practices. Caution Transmitter mode is for diagnostic purposes only. Use a fresh battery. Do not use the calibrator in place of a transmitter for extended periods. Documenting Process Calibrator Transmitter Mode To set up the calibrator to emulate a transmitter, proceed as follows: 1. Disconnect the control bus wires from the transmitter output (loop current or dc V control signal). 2. Connect test leads from the appropriate calibrator SOURCE jacks to the control wires in place of the transmitter. 3. Disconnect the process input (e.g., thermocouple) from the transmitter. 4. Connect the process input to the appropriate calibrator MEASURE jacks or input connector. 5. If necessary, press M for MEASURE mode. 6. Press the appropriate function key for the process input. 79

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Documenting Process Calibrator
Transmitter Mode
79
Transmitter Mode
You can set up the calibrator so that a varying input
(MEASURE) controls the output (SOURCE), like a
transmitter. This is called “Transmitter mode.” In
Transmitter mode, the calibrator can be temporarily
used as a substitute for a defective or suspect
transmitter.
w
Warning
Do not use Transmitter mode in any
environment that requires intrinsic safe
equipment and practices.
Caution
Transmitter mode is for diagnostic
purposes only. Use a fresh battery. Do
not use the calibrator in place of a
transmitter for extended periods.
To set up the calibrator to emulate a transmitter,
proceed as follows:
1.
Disconnect the control bus wires from the
transmitter output (loop current or dc V control
signal).
2.
Connect test leads from the appropriate
calibrator SOURCE jacks to the control wires in
place of the transmitter.
3.
Disconnect the process input (e.g.,
thermocouple) from the transmitter.
4.
Connect the process input to the appropriate
calibrator MEASURE jacks or input connector.
5.
If necessary, press
M
for MEASURE mode.
6.
Press the appropriate function key for the
process input.