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Hi-Pot Test
THIS IS A MANDATORY TEST
Note: If an the unit under test requires disassembly as part of the repair, it MUST be Hi-Pot tested before being
returned to the customer to ensure that there is no potential shock hazard. This test requires a Hi-Pot tester with a
ground bond attachment to perform this test.
Connections:
The Hi-Pot tester connects to the unit under test (UUT) by means of a wiring harness. The AC line cord of the UUT
plugs into the Hi-Pot tester AC adapter box. The return line connects to the Heat Sink Screw on the I/O panel.
Hi-Pot Tester Settings:
1500 VAC, rise time = 1 second, dwell = 3 seconds, current limit = 5.0 mA. Connect the AC mains cord to unit un-
der test. Plug the other end of the AC cord into the Hi-Pot tester AC adapter box. The AC adapter box connects to
the High Voltage (HV) connection on the Hi-Pot tester.
• Connect the Hi-Pot tester RETURN line to the Heat Sink Screw as shown in gure 41.
Figure 41
• With the tester set to the above parameters, perform the test. If the unit fails, troubleshoot it and repair the prob-
lem. Once the unit is repaired, repeat the Hi-Pot and the ground bond test to ensure the unit is safe to return to the
customer.
Ground Bond Test:
Note: This test only needs to be performed if the chassis ground wire from the AC IE Cconnector to the inside of
the chassis of the unit has been removed or disturbed as part of a repair. If it has not, this test does not need to be
performed. This test measures current handling capability between the ground blade on the AC inlet or mains plug
and the earth bond point GND of the Metal shell of the unit.
Ground Bond Tester Settings:
10A, < 12VAC open circuit, < 0.1 Ohms from AC earth terminal on IEC connector in chassis, to earth bond point on
rear of chassis. Test duration = 3 seconds.
• Connect the AC mains cord to the back of the amplier under test. Plug the other end ofthe AC cord into the
ground bond test box.
• With the tester set to the above parameters, perform the test. If the unit fails, remove the top cover and repair the
problem. Once the unit is repaired, repeat the Hi-Pot and the ground bond tests to ensure the unit is safe to return
to the customer.
Safety Test Procedures
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