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7.3.2. Test 2: EPC Supervisory Current Test
This Output Analyzer test verifies the acceptability of the supervisory current supplied by the EPC's series firing
circuit. The Analyzer comes with jumpers and test leads that are used to perform this test. To get started:
1.
Power down the EPC.
2.
Disconnect and shunt the series firing circuit terminal block (P3-2) from the EPC.
3.
Use the EPC Test Harness supplied with the Analyzer to connect it to the series firing circuit (P3-2), as shown
in Figure 7.3.2-1 below
4.
Connect the 75Ω Resistor to the Analyzer, as shown in Figure 7.3.2-1 above.
5.
Power on the EPC.
6.
Turn on the Analyzer, wait the three seconds for the battery charge status to flash, then press and release the
SELECT button to arrive at the EPC Tool menu (Option #1); press the ENTER button to choose this option. The
supervisory current supplied by the series firing circuit (P3-2) will display. (See Section 7.2, Interpreting EPC
Measured Results, for more information or if you have questions regarding the results.)
Supervisory
Current: 5.9 mA
7.
Record the reading obtained for future reference, since supervisory current results are not stored in memory.
NOTE: The supervisory current is intended only as a trouble-shooting tool to gauge whether anything has
changed since the last reading. The supervisory current reading at the EPC or the field device will be between
3 – 10 mA.
8.
Press and release the SELECT and ENTER buttons at the same time to return to the main menu.
9.
Select the EPC TOOL option from the Main Menu to prepare for the next test.
PAGE / 8
Figure 7.3.2-1 EPC Series Firing Circuit Supervisory Current Test
Doc. P/N 06-905
Rev. 1 / December 2018
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