TESTING INSTRUCTIONS
Connect the switch to the ST-800, place a suitable target in front of the switch. If the switch is functioning correctly, the unit will give audio and visual indication showing the switch operates and indicating the functionality of the switch according to the chart below.
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Switch type
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Buzzer & LED on when
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LED
|
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PNP normally open
|
target in range
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PNP
|
|
PNP normally closed
|
target not in range
|
PNP
|
|
NPN normally open
|
target in range
|
NPN
|
|
NPN normally closed
|
target not in range
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NPN
|
If the proximity switch does not give such feedback when correctly connected to the tester, it has probably failed. [Note: The ST-800 will not test 2 wire AC or DC switches]
LED Functions
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Green I/O LED
|
switch connected & unit on
|
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Red (Batt) LED
|
battery low indicator
|
|
PNP or NPN LED
|
indicated switch type
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