90
86
240PW9 LCD
220BW8 plus LCD
Safety Test Requirements
All units that are returned for service or repair must pass the original manufactures safety tests. Safety testing requires both Hipot and Ground Continuity testing.
HI-POT TEST INSTRUCTION
1.Application requirements
1.1All mains operated products must pass the
1.2This test must be performed again after the covers have been refitted following the repair , inspection or modification of the product.
2. Test method
2.1 Connecting conditions
2.1.1The test specified must be applied between the parallel- blade plug of the mainscord and all accessible metal parts of the product.
2.1.2Before carrying out the test, reliable conductive connections must be ensured and thereafter be maintained throughout the test period.
2.1.3The 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 | Ground Continuity | ||
| products where | products where | Test requirement |
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| |
| the mains input | the mains input |
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| is 220V AC | is 110V AC |
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Test | 2820VDC | 1700VDC | Test current: |
voltage | (2000VAC) | (1200VAC) | 25A, AC |
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Test time | 3 seconds | 1 seconds | Test time: |
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| |
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| 3 seconds |
Trip current | Set at 100uA for | 5mA |
|
(Tester) | Max limit; |
| Resistance required: |
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| |
| Set at 0.1uA for |
| <=0.09+Rohm, |
| Min limit. |
| R is the resistance |
|
|
| of the mains cord. |
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|
Ramp time | Set at 2 seconds |
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|
(Tester) |
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2.2.1 The minimum test duration for Quality Control Inspector |
must be 1 minute. |
2.2.2 The test voltage must be maintained within the specified |
voltage + 5%. |
2.2.3 There must be no breakdown during the test. |
2.2.4 The grounding blade or pin of mains plug must be |
conducted with accessible metal parts. |
3. Equipments and Connection
3.1. Equipments
For example :
- Zentech 9032 PROGRAMMABLE AUT O SAFETY
TESTER
3.2.Connection
* Turn on the power s witch of monitor before H ipot and G round C ontinuity tes ting.
(Z entech 9 032 tes ter)
C lip
C onnect the clip to the monitor.
C onnect the power cord to the monitor.
4. Recording
P ower outlet
(R ear view of monitor)
Hipot and Ground Continuity testing records have to be kept for a period of 10 years.