JT5 Operator’s Manual Systems and Equipment - 95
Electric Strike System
CMW
®
To test for current at strike levels:
1. Put two or three loops through current transformer.
2. Follow steps above to test.
3. Display should show the following:
• All lights should turn on.
• Alarm and strobe should turn on.
With two loops,
• Current "A" should be 80-110%.
• Strike indication might go on and off.
With three loops,
• Current should be 130-160%.
• Strike indication should be continuous.
Voltage Test
1. Place voltage limiter on something insulated from ground and drilling unit (such as dry board or tire),
but near frame of drilling unit.
2. Clip one lead to frame.
3. Clip other lead to one voltage limiter mount.
4. Move simulator switch to "voltage" and press test button.
5. Watch screen and lights above display on strike system.
• All lights should turn on.
• Alarm and strobe should turn on.
• Voltage "V" should show 90-110%.
It is normal for simulator voltage levels to drift below strike level. When this happens, light in triangle should
go off and alarm and strobe should stop working. If the level drifts above strike level again, light, alarm, and
strobe should be turned on again.
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