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9. With the leads connected and the appropriate test jumper installed, the Analyzer will initiate a 30-second
countdown timer to ensure the internal series firing circuit on the EPC is charged and ready to fire. The Analyzer
will display a countdown to indicate when the time delay has expired and the EPC is ready for testing.
Wait: Charging
Countdown: 30
10. Once the countdown timer reaches 0, the display will indicate the system is ready to be activated.
System Ready
Activate Now
11.
WAIT!
DO NOT use the ACTIVATE button on the Analyzer to initiate the test. Instead, activate the series firing
circuit by initiating an input signal at the EPC's 4-20 mA detection inputs (P2-1 or P2-2).
12. The Analyzer will then display the reading obtained during the test, along with the PASS/REPLACE result.
5.97 5.7 5.5 5.2
EPC Passes
13. Record the reading obtained for future reference, since subsequent tests will override current test data.
14. Reset the EPC and ensure it is in a normal "up" condition, with no trouble light on.
15. Proceed to Test 4.
7.3.4. Test 4: Field Wiring Supervisory Current Test
This Output Analyzer test verifies the supervisory current being supplied by the EPC to the field devices through
series firing circuit field wiring. The Analyzer comes with jumpers and test leads used to perform this test. To get
started:
1. Connect the alligator leads to the Analyzer and field box terminals, as shown in Figure 7.3.3-1.
2. Install the 75Ω Resistor on the Analyzer.
3. The supervisory current supplied by the series firing circuit (P3-2) will be displayed. The reading must be within
two tenths of the value measured in Test 2.
Supervisory
Current: 5.9mA
4. Record the reading obtained for future reference, since subsequent tests will override current test data.
5. Return to the main menu and select the EPC tool again.
6. Disconnect the test connector from the field box terminals.
7. Power down the EPC.
8. Install a 1-Ohm Resistor (P/N E10-0174) onto the field box terminals where the GCA leads are normally
connected.
9. Ensure the EPC is in a normal "up" condition, with no trouble light on.
10. Repeat Tests 3 and 4 for each field box, measuring both the activation and supervisory current for each box.
11. End of testing. Place system back into normal operational state.
PAGE / 10
2.8 2.7 2.7 2.6
REPLACE EPC
Doc. P/N 06-905
Rev. 1 / December 2018
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