Nortel Meridian 1 Manual page 432

Page 394 of 500
553-3001-210 Standard 14.00 June 1999
Appendix A: NT0R72, NT6D82, QBL12, QBL15, QCA13
• Turn the FLT potentiometer 1/4 turn counterclockwise.
• Set the AC BRKR switch to OFF, then back to ON.
• Check the voltmeter. Slowly turn the FLT potentiometer clockwise.
The voltmeter reading should increase until the desired high voltage
shutdown value is reached and then drop to 0 volts.
• If necessary, repeat these adjustments until the desired level for high
voltage shutdown is set.
7 Turn the FLT potentiometer to obtain the desired float voltage reading
(see Table 102). Set the AC circuit breaker to OFF and then back ON.
8 If wires where removed from the SENS terminals on TB4, remove the
jumper straps and reconnect the black wire to +SENS and the red wire to
-SENS. Store the jumper straps under the two screws provided adjacent
to TB4.
9 Perform this procedure on each rectifier.
Table 102
Rectifier settings
Specification
High voltage shutdown
Float voltage
Range
–56.5 to –57.5 V
–51.5 to –54.0 V