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Automated Pressure Calibrator
Calibration Tasks
49
CPS Purge
Purge pressurizes and vents the test system plumbing connected to the Product.
Fluke Calibration recommends that if liquid or particulate contaminates are
expected to be present, the user should do a system purge before a calibration is
performed. The Product maintains internal cleanliness during any operation, but
contaminates are most easily handled during a relatively low pressure purge. To
purge the system, the Product pressurizes to the user-defined purge pressure
and then immediately vents to the plastic waste container. The Product repeats
the process for the number of cycles that are set.
To run a purge process:
1. Select CPS purge and push to enter the menu.
2. Set the Pressure (100 kPa for example).
3. Push to save.
4. Set how many times to cycle (or repeat).
5. Push to save.
6. Push to run the purge process.
Calibration Tasks
Transmitter
The first step in transmitter calibration is to do an As Found calibration. As Found
calibrations are done by configuring and running a mA “Program”. A Program is
used to define the test parameters including test points, tolerances, and mode
(absolute/gauge). With the mA program, a “Closed Loop” function can be used to
fully automate the test.
Before running a mA program to perform an As Found or As Left test:
1. Prior to the test, do a leak test on the transmitter to make sure there are no
significant leaks. See the Leak Test section.
2. Connect the transmitter to one of the pressure ports and connect the test
leads from the EMM to the appropriate terminals on the pressure transmitter.
Observe polarity. See Figures 7 and 8. Make sure to plug the test port that is
not in use.
3. Push on the front panel.
4. From the main menu, push Tasks and select Transmitter.
The Transmitter menu is explained below in the next sections.
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