Main Ac Fuse; Battery; Cpu Display Board - Ametek 303B User Manual

5-4 | 303B Moisture Analyzer Manual
the ribbon plug from J2.
3. Remove the four mounting screws and board from its mounting.
Main AC Fuse (Figure 5-1)
1. To gain access, perform steps 1, 2 and 3 above under Flow Meter Tubes
section.
2. Locate fuse F1 on the power supply board near the transformer.
3. Lift out F1 and test with an ohm meter. If open, use appropriate fuse
type stated in Section 5.
4. If fuse blows again, replace power supply pc board.
Battery (Figure 5-1)
1. To gain access, perform steps 1, 2 and 3 above under Flow Meter Tubes
section.
2. Remove the wire terminals from the battery. Note that red wire is on
+ terminal.
3. Remove the two bracket nuts, move the bracket to the side, and lift
out the battery.
4. If new battery does not fix problem, check polarity. Allow 24 hours for
initial charge.
!
On battery replacement, use only AMETEK 303020001, nominal
12Vdc @ 5 Amp hour.
WARNING
CPU/Display Board
1. To gain access, perform steps 1, 2 and 3 above under Flow Meter Tubes
section.
2. Remove connectors P6, P1, P3, and P5.
3. Remove the three mounting nuts and the board.