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Doc. P/N 06-905
Rev. 1 / December 2018
7.
The current reading displays, along with “ARM PASSES” or “FAIL REPLACE ARM.”
NOTE: The upper limit of each test range is provided to help you determine when a component is nearing the
end of its useful life and should be replaced. For the Fire ARM, the average of the four test readings must be
greater than or equal to 95% of 3.5 amps, or 3.325A. If the average is approaching 3.325A, consider replacing
the ARM.
8.
Press and release the ENTER button to repeat the test, or press and release the SELECT and ENTER buttons
at the same time to return to the Main menu.
9.
Power down and remove the tester.
10.
End of testing. Place system back into normal operational state.
10.0
EP ARM TESTING
10.1.
EP ARM Operational Overview
The Output Analyzer can be used to perform two important testing functions associated with the EP ARM’s firing
circuit. The first testing function assesses the EP ARM’s ability to supply the correct current (amps) required to
activate the actuator devices connected to the firing circuit; the second testing function assesses the integrity of the
field wiring by measuring the supervisory current at the EP-ARM.
When the device is connected to an EP ARM for testing, the activation signal is provided from a pressure or optical
detector. The device will then measure the current supplied by the EP-ARM’s firing circuit and display the result on
the LCD panel. Three readings will be taken to ensure the EP ARM is supplying adequate firing current, with readings
occurring instantaneously.
10.2.
Interpreting EP ARM Measured Results
Once you’ve used the Output Analyzer to test the activation current supplied by the EP-ARM, the Analyzer will display
the results on the front panel as either EP ARM PASSES or FAIL REPLACE ARM.
When the Analyzer is used to test the supervisory current supplied by the Explosion Protection Controller, it will
display the supervisory current reading in milliamps. The acceptable supervisory current reading at the EP-ARM is
20 – 54mA.
1.78 2.2 2.6 2.8
FAIL REPLACE ARM
5.65 6.1 3.9 2.3
ARM PASSES
