78 Appendix A
Agilent 4072/4073 Preinstallation Guide, Edition 4
Confirming the System Power Safety
Confirming PDU and EMO Operation
Confirming PDU and EMO Operation
When you confirm the PDU and EMO operation, use the following procedure.
1. Disconnect all power cords from the power outlets in the system cabinet, and turn off all the instruments,
controller, and peripherals.
2. Set the following:
Switch board breaker Off position
Emergency breaker Off position
Disconnect device Off position
EMO button Out position
EMO protector In position
Fan protectors In position
Power outlet protector In position
To set the EMO button on the EMO panel to the out position, rotate the switch in a clockwise direction.
The position of the EMO, cabinet fan, and testhead fan protectors are exchanged by pressing the protector
button.
3. For the PDU’s 200 V option, check the ground-fault circuit interrupter (GFCI) as follows:
a. Turn the handle of the disconnect device to set the on position. When stopping the handle turning, rotate the
door lock release screw counterclockwise then set the disconnect device to on.
b. Confirm that the white push-button, labeled “LEAKAGE INDICATOR”, is in its normal position
(in position).
c. Press the gray push-button to force earth leakage current. Confirm that the breaker behind the disconnect
device turns off (moved to middle position), and the leakage indicator has moved to the out position to
indicate the earth leakage condition.
d. Set the breaker behind the disconnect device to the on position (reset the leakage indicator) as follows:
i. Set the disconnect device to the off position. The GFCI indicator moves to the in position.
ii. Set the disconnect device to the on position.
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