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JT5 Operator’s <strong>Manual</strong> Systems and Equipment - 101<br />
Electric Strike System<br />
To test for current at strike levels:<br />
1. Put two or three loops through current transformer.<br />
2. Follow steps above to test.<br />
3. Display should show the following:<br />
• All lights should turn on.<br />
• Alarm and strobe should turn on.<br />
With two loops,<br />
• Current "A" should be 80-110%.<br />
• Strike indication might go on and off.<br />
With three loops,<br />
• Current should be 130-160%.<br />
• Strike indication should be continuous.<br />
Voltage Test<br />
1. Place voltage limiter on something insulated from ground and drilling unit (such as dry board or tire),<br />
but near frame of drilling unit.<br />
2. Clip one lead to frame.<br />
3. Clip other lead to one voltage limiter mount.<br />
4. Move simulator switch to "voltage" and press test button.<br />
5. Watch screen and lights above display on strike system.<br />
• All lights should turn on.<br />
• Alarm and strobe should turn on.<br />
• Voltage "V" should show 90-110%.<br />
It is normal for simulator voltage levels to drift below strike level. When this happens, light in triangle should<br />
go off and alarm and strobe should stop working. If the level drifts above strike level again, light, alarm, and<br />
strobe should be turned on again.<br />
CMW
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