Adjusting the rectifier and the dc distribution shelf 10-27
AccessNode Series 800A Outside Plant Cabinet Installation 323-3001-210 Issue 1.0
Procedure 10-8 (continued)
Adjusting dc distribution shelf low voltage alarms
Action
Step Action
1 Ensure that the LVD BYP/NORMAL switch is set to the BYP position.
2 Connect the digital voltmeter to the BAT GRD and -48V test points on the front
of the dc distribution shelf.
3 Monitor the voltage at the test points to verify the LVA threshold.
4 Slowly adjust the TST ADJ potentiometer counterclockwise until one of the
three events shown in Table 10-12 occurs.
5 Continue to adjust the TST ADJ potentiometer counterclockwise until the
voltage reading reaches -47.0 ± 0.2 V dc.
6 Slowly turn the LVA ADJ potentiometer clockwise until the LVA LED
extinguishes.
7 Slowly turn the LVA ADJ potentiometer counterclockwise until the LVA LED
illuminates.
8 Go to step 11.
9 Using the TST ADJ potentiometer, set the voltage reading to -47.0 ± 0.2 V dc.
10 Slowly turn the LVA ADJ potentiometer clockwise until the LVA LED
illuminates.
11 Continue the dc distribution shelf adjustments using Procedure 10-9 on page
10-28.
—end—
Table 10-12
LVA LED indications
If the event that happens while you are
adjusting the TST ADJ potentiometer
is
Then perform these steps
The LVA LED illuminates before reaching
-47.0 ± 0.2 V dc
go to step 5.
The LVA LED does NOT illuminate
before reaching -47.0 ± 0.2 V dc
go to step 9.
The LVA LED illuminates at
-47.0 ± 0.2 V dc
go to Procedure 10-9 on page 10-28.
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