24
OPERATION PROCEDURE
TOS8870A
[3]
ACW/FAIL signal
This signal is generated when a FAIL judgment is made for the withstanding voltage test. This sig-
nal remains on till the following operation is done.
• The next STOP signal is applied.
• The STOP switch is pressed.
• The PROTECTION signal is applied.
[4]
IR/FAIL signal
This signal is generated when a FAIL judgment is made for the insulation resistance test. This sig-
nal remains till the following operation is done.
• The next STOP signal is applied.
• The STOP switch is pressed.
• The PROTECTION signal is applied.
[5]
READY
•
When in the MOMENTARY of Special Test Mode, this signal is not generated.
This signal is continuously delivered when the Tester is in the READY state.
The READY state that the Tester is ready to be driven into the TEST ON state. That is, this signal
is delivered when the test that all following
fi
ve conditions are met.
• Power of the Tester is turned on.
• The STOP signal is not applied. (or the STOP switch is not pressed.)
• Not in the TEST ON state.
• Not generating the PASS signal.
• Not generating the FAIL alarm.
• Not in the PROTECTION state.
As the START signal is applied (or the START switch is pressed) when the READY signal is being
delivered, the Tester starts the test operation.
■
Contact signals
The contact signals are only with contacts and without any power sources as Fig.3-10. Therefore,
cannot drive any loads which have no power.
Fig.3-10
A contact which is closed when the signal is applied is called make contact, normally open contact,
or form "a" contact. A contact which opens when the signal is applied is called break contact, nor-
mally closed contact, or form "b" contact. The contacts of the Tester are of the make-contact type
and their rating is 125 VAC, 1 A or 30 VDC, 1 A. The withstanding voltage is 500 VAC 1 minute
between the circuit and chassis.
NOTE
TOS8870A
TEST ON signal
PASS signal
IR/FAIL signal
ACW/FAIL signal
READY signal
SIGNAL OUT terminal
