ADT -CHG-120 Instruction Manual page 17

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You can also order and install a ammeter (AM-1), voltmeter (VM-1), or both (MPM-3) for
use with the charger. If mounting an AM-1 or a VM-1, mount the meter to a BB-55 as
shown in Figure 14. If mounting an MPM-3, mount to a power supply (Figure 15) installed
in a CAB-3. Table 6 contains descriptions and part numbers for these optional meters:
Item Part Number
Ammeter AM-1
Voltmeter VM-1
Ammeter and MPM-3
Voltmeter
Assembly
To install an AM-1, follow these steps:
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1. Cut jumper JP9 on the charger (Figure 13).
2. Connect the AM-1 harness to JP3 on the charger (Figure 11)—making sure to observe
proper polarity.
3. Mount the AM-1 into a mounting slot on the front of the BB-55 (Figure 14):
Figure 14 Mounting an AM-1 or VM-1 to a BB-55 Battery Box
Description
0-10 A ammeter with a 3-ft. cable for connection to the
charger (JP3). Mounts into a BB-55 battery box only.
0-50 V voltmeter with 3-ft. positive and negative leads
for connection to the charger output circuit. Mounts
into a BB-55 battery box only.
An AM-1 and VM-1 attached to a mounting bracket.
Mounts onto a power supply.
Table 6 Optional Meters
ADT-CHG-120 Instruction 05/01/98 PN 50938:A
Installing Optional Meters