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SAFETY INTERLOCK CONTINUITY TEST
6. Interlock switches
• You can test continuity of safety interlocks and monitor switch by using switch tester or ohmmeter.
• The switch operation is checked by zero/unlimited.
the meter should indicate zero resistance.
• The sequence of check is interlock monitor switch; primary and secondary interlock switched check.
1) In case of interlock monitor switch check
POWER
SUPPLY
CORD
2) In case of primary interlock switch check.
POWER
SUPPLY
CORD
PRIMARY
INTERLOCK SWITCH
OHHMETER
PRIMARY
INTERLOCK SWITCH
OHHMETER
Condition
1) Door is opened.
2) Common terminal of the monitor switch disconnected.
INTERLOCK
MONITOR
SWITCH
Condition
1) Door is closed.
INTERLOCK
MONITOR
SWITCH
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