Replenish Low Electrolyte; Charge Control Thermistor Test - Saft 4579 Component Maintenance Manual With Illustrated Parts List

COMPONENT MAINTENANCE MANUAL
(5)

Replenish low electrolyte:

NOTE:
(a)
(b)
(c)
(d)
J.

Charge Control Thermistor Test

The charge control thermistor is part of the temperature sensor assembly (22). It is
permanently mounted on a sensor plate (23) between cells #6 and #9. Disassembly is
required to test the charge control thermistor (DISASSEMBLY). Check the function
of the charge control thermistor as follows:
(1) Connect an ohmmeter to pins 1 & 3 of the connector at room temperature
[70°F (±5°F) (21.1°C (±2°C)]. Ohmmeter reading should indicate a closed
circuit (<1MΩ).
(2) Connect an ohmmeter to connector pins 11 and 12 of the temperature sensor
assembly (22). Verify the ohmmeter reads 2360Ω to 3050Ω at room
temperature [70°F (±5°F) (21.1°C (±2°C)].
(3) Immerse the thermistor plate in a beaker containing a mixture of ice and water.
(4) Insert a thermometer or other suitable temperature-measuring device, in the
container in contact with the plate.
SAFT AMERICA INC.
4579
Use only distilled or demineralized water. The quantity (in
3
cm ) of distilled water required to fill the cell to the correct
level will serve as an approximate guide to the amount required
for the remaining cells. The water in each cell, however, must
be adjusted individually to the correct level. If the quantity of
water added per cell exceeds 80 cm
If the charger is functioning properly, shorten the period
between servicing.
3
Draw 5 cm of the distilled water into the syringe and inject it into the
cell.
With the syringe nozzle resting on the valve seat, slowly withdraw the
plunger in the syringe.
If the syringe remains empty, repeat steps (a) and (b), counting the
3
number of 5 cm injections required to achieve the correct level.
At the point in step (b) when some excess liquid is drawn into the
syringe, the correct level for that cell has been reached. Expel the
excess liquid into a separate container for later disposal.
3
check the charging system.
24-31-05
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July 13/01