Process Instrument Calibration; Generate "As Found" Test Data - Fluke 753 User Manual

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Users Manual

Process Instrument Calibration

To calibrate a HART-capable transmitter using the
built-in HART interface, see the 754 HART Mode
Users Guide for instructions.
When the Product is in MEASURE/SOURCE, a built-in
calibration routine can be configured when the As Found
softkey is pushed. As Found data is the test results that
show the condition of a transmitter before it is adjusted. The
Product can run preloaded tasks that are developed with a
host computer and DPCTrack2 application software. See
"Communication with a PC".

Generate "As Found" Test Data

The subsequent example shows how to supply as
found data for a thermocouple temperature transmitter.
68
Note
Here, the Product simulates the output of a thermocouple
and measures the current regulated by the transmitter.
Other transmitters use this same procedure. Go back to
MEASUREMENT or SOURCE mode and change the
operation parameters before you push As Found.
1. Connect the test leads to the instrument under test as
shown in Figure 30. The connections simulate a
thermocouple and measure the corresponding output
current.
2. If necessary, push  for MEASURE mode.
3. Push .
4. Push  for SOURCE mode.
5. Push t and  to select TC sensor.
6. Push  and  to select the thermocouple type.
7. Push  to select then  to select Linear T source
mode.
8. Record a source value, for example 100 degrees, and
then push .