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Safety Test Requirements 107B2 CM24 GSIII 67
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All units that are returned for service or repair must pass the original 3. Equipments and Connection
manufactures safety tests. Safety testing requires both Hi-pot and
Ground Continuity testing.
3.1 Equipments
For example :
- ChenHwa 510B Digital Grounding Continuity Tester
1. Application requirements - ChenHwa 901 (AC Hi-pot test), 902 (AC, DC Hi-pot test)
Withstanding Tester
1.1 All mains operated products must pass the Hi-Pot test as
described in this instruction. 3.2 Connection

1.2 This test must be performed again after the covers have * Turn on the power switch of monitor before Hipot and
been refitted following the repair, inspection or modification Ground Continuity testing.
of the product.

2. Test method

2.1 Connecting conditions

2.1.1 The test specified must be applied between the parallel-
blade plug of the mainscord and all accessible metal
parts of the product.
2.1.2 Before carrying out the test, reliable conductive
connections must be ensured and thereafter be
maintained throughout the test period.

2.1.3 The mains switch(es) must be in the "ON" position.

2.2 Test Requirements

All products should be HiPot and Ground Continuity tested as follows:

Condition HiPot Test for HiPot Test for Ground Continuity
products where products where Test requirement
the mains input the mains input is
(ChenHwa 9032 tester)
range is Full 110V AC(USA
range(or 220V type)
Video cable

Test 2820VDC 1700VDC Test current:
voltage (2000VAC) (1200VAC) 25A,AC
Test time:
Connect the "video cable"
Test time 3 seconds 1 second 3 seconds(min.)
or "grounding screw"
(min.) Resistance
to the CLIP on your tester.
Trip set at 100 uA 5 mA <=0.09+R ohm,
current for Max. R is the
(Tester) limitation; set resistance of
at 0.1 uA for the mains cord.
Min. limitation
Grounding screw
Ramp set at 2
time seconds

Connect the power cord
to the monitor.

2.2.1 The test with AC voltage is only for production purpose,
Service center shall use DC voltage.

2.2.2 The minimum test duration for Quality Control Inspector
must be 1 minute. No breakdown during the test. Power outlet

2.2.3 The test voltage must be maintained within the specified 4. Recording (Rear view of monitor)
voltage + 5%.
Hipot and Ground Continuity testing records have to be kept for a period
2.2.4 The grounding blade or pin of mains plug must be of 10 years.
conducted with accessible metal parts.

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