Agilent Technologies 4072A Advanced Pre-Installation Manual page 80

Confirming the System Power Safety
Confirming PDU and EMO Operation
6. Check the EMO button and ext alarm 1 and 2 terminals as follows:
a. Check the conductivity of the ext alarm 1 and 2 terminals on the PDU using a hand-held multimeter. The
resistance between the ext alarm 1 terminals must be set at approximately 0 ohm, and the resistance
between the ext alarm 2 terminals must be set very high.
b. Press the EMO button.
c. Confirm that the emergency breaker is set to the off position, and confirm that the LINE indicator and the
green LED in the INSTRUMENT POWER ON switch are turned off.
d. Check the conductivity of the ext alarm 1 and 2 terminals in the emergency off condition. The resistance
between the ext alarm 1 terminals must be set very high, and the resistance between the ext alarm 2
terminals must be set at approximately 0 ohm.
e. Press the INSTRUMENT POWER ON switch, and confirm that the green LED in the INSTRUMENT
POWER ON switch does not turn on.
f. Rotate the EMO button in a clockwise direction to set it to the out position (normal position).
7. Check the ext control terminals as follows:
a. Confirm that the LINE indicator is turned off.
b. Remove the shorting bar connected between the ext control terminals.
c. Confirm that you cannot set the emergency breaker to the on position.
d. Reinstall the shorting bar on the ext control terminals.
e. Set the emergency breaker to the on position, and confirm that the LINE indicator turns on.
f. Press the system switch, and confirm that the green LED in the system switch turns on.
NOTE
Do steps e through f within 20 seconds. After 20 seconds, the cabinet fan error LED turns on. To
recover this, set the emergency breaker to the off position and repeat steps e through f.
g. Press the INSTRUMENT POWER ON switch, and confirm that the green LED in the INSTRUMENT
POWER ON switch turns on.
8. Check the EMO protector as follows:
a. Press the EMO protector to set it to the out position.
b. Confirm that the emergency breaker is set to the off position, and also confirm that the LINE indicator and
the green LED in the INSTRUMENT POWER ON switch turn off.
c. Press the EMO protector to set it to the in position.
d. Set the emergency breaker to the on position, and confirm that the LINE indicator turns on.
e. Press the system switch, and confirm that the green LED in the system switch turns on.
NOTE
Do steps d through e within 20 seconds. After 20 seconds, the cabinet fan error LED turns on. To
recover this, set the emergency breaker to the off position and repeat steps d through e.
f. Press the INSTRUMENT POWER ON switch, and confirm that the green LED in the INSTRUMENT
POWER ON switch turns on.
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Agilent 4072/4073 Preinstallation Guide, Edition 4
Appendix A