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170B6 LCD
All units that are returnedfor service or repair mustpass the
originalmanufacturessafety tests. Safety testingrequiresboth
and testing.Hipot Ground Continuity
HI-POT TEST INSTRUCTION
1.Application requirements
2.
1.1 All mains operated products mustpass the Hi-Pot testas
describedinthis instruction.
1.2 This test must be performed again after thecovershave
been refittedfollowingthe repair, inspection or modification
of theproduct.
2.1Connect
ingconditions
2.1.1 Thetest specified must be appliedbetween the parallel-
bladeplugof the mainscord and all accessible metal
parts of theproduct.
2.1.2 Before carryingoutthetest, reliableconductive
connections mus
t beensured and thereafter be
maintained throughoutthetest period.
2.1.3 The mains switch(es) must be in the "ON" position.
2.2 Test Requirements
All productsshould be HiPot and Ground Continuity tested
as
follows:
Test 2820VDC 1700VDC Testcurrent:
voltage (2000VAC)(1200VAC) 25A,AC
Testtime:
Testtime3seconds 1 second 3 seconds(min.)
(min.) Resistance
required:
Trip set at 100 uA 5 mA <=0.09+Rohm,
current for Max. R is the
(Tester) limitation; set resistance of
at 0.1 uA for the mains cord.
Min. Limitation
Ramp set at 2
time seconds
(Tester)
Test method
Condition HiPot Test for HiPot Test for Ground Continuity
productswhere productswhere Testrequirement
the mains inputthe mains input is
range is Full 110VAC(USA
range(or 220V type)
AC)
2.2.1 The minimum test durationfor Quality ControlInspector
must be1minute.
2.2.2 Thetestvoltage must be maintainedwithin the specified
voltage + 5%.
2.2.3 There must be no breakdown duringthetest.
2.2.4 Thegrounding bladeorpin ofmains p
lug must be
conductedwith accessible metal parts.
3. Equipments and Connection
3.1. Equipments
For example :
- ChenHwa 9032 PROGRAMMABLE AUTO SAFETY
TESTER
- ChenHwa 510B Digital GroundingContinuityTester
- ChenHwa 901 (AC Hi-pot test), 902(AC, DC Hi-pot test)
Withstanding Tester
3.2. Connection
4. Recording
Hipot and Ground Continuity testing records have to be kept
for a period of 10 years.
*Turn on thepower switch ofmonitor before Hipot and
Ground Continuity testing.
Connect the "video cable"
or "grounding screw"
to the CLIP on your tester.
Video cable
(Rear view of monitor)
Connect the power cord
to the monitor.
Grounding screw
Power outlet
(ChenHwa 9032 tester)
Clip
Clip
SafetyTest Requirements
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