Tatung VM77S Service Manual - 1-4 Ground Continuity Test

Precautions

Page 4

 VM77S

d)

Plug monitor power cord to the Hi Pot tester terminals.

e)

Turn on tester and watch the indicator or beeper.

f) If the indicator lamp lights, or beeper beeps, the test fails.

1-4 Ground Continuity Test

1. Test Equipment

AC low ohm tester TOS-6100 or equivalent approved equipment.

Note : The test equipment must be calibrated in regular period.

2. Test Setup

a)

Test duration : 3 seconds

b)

Set current limit at 25 A

c)

The grounding resistance must be less than 0.1 ohm.

3. Test Procedure

a)

Plug the monitor power cord to the tester terminals.

b)

Make sure all connections are well-contacted.

c)

Turn on monitor power and tester power.

d)

Press “Test” button.

e)

If green light shows up, means test OK.

If red light shows up, means test fails.

f)

If the Tester has a digital display, the resistance value must not exceed 0.1 ohm.

Note : Be sure not to touch the metal portion of the signal cable head during testing.

Test Equipment

Monitor