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