Structural/Accessory Maintenance
160
Battery Voltage Indicator
The battery voltage indicator is field replaceable.
If the indicator needle oscillates when the test
button is depressed, or the needle remains in the
red zone when a new battery is installed, replace
the voltage indicator assembly:
1. Remove the knurled chart nut and chart.
Remove the recording platen.
2. Loosen the two terminal screws on the
terminal board and remove the voltage
indicator wires.
3. Loosen the two mounting screws that mount
the voltage indicator assembly in the recorder.
Remove the voltage indicator (includes
battery holder).
4. Install a new voltage indicator. Install and
securely tighten the two mounting screws.
5. Connect the voltage indicator wires to the
terminal board. Make sure the red positive (+)
wire and black negative (-) wire are correctly
aligned.
6. Reinstall the battery in the battery holder (with
correct polarity). Check the voltage indicator
by depressing the test button to make sure the
indicator needle is in the blue zone. Also
check to see that the quartz motor is operating
(flywheel revolving).
7. Replace the recording platen, recording chart
and chart nut. Lower the recording pen.
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