Hawker F20/4H1C-R Operating And Maintenance Manual page 24

5. Tighten and torque the upper nuts as detailed in section 1.6.2, table 1
6. Inspect visually harnesses with temperature switches, thermistors,
thermocouples, and for loose wiring, cracks, dents, connector pins
in place and any damages.
7. Measure the insulation resistance with a MΩ-meter at 250 V DC
between the + pin of the battery connector and the battery case.
Requirement: ≥0.5MΩ
8. Measure and record cell voltages.
9. Mark cells with voltages lower than 1.2V (as possible defective cells).
10. Undo the vents and keep them aside on the cells mouth.
ATTENTION
Do not top up the cells with water at this stage.
11. Connect the battery to the charge / discharge unit.
ATTENTION
Do not use mercury thermometer.
12. Check the battery temperature; Requirement: below 35°C.
13. Discharge the 24 V battery at I
previously marked cell(s) in step 8/9).
Requirement: The voltage of each cell after 48 minutes must be equal
/ greater than 1.0V.
Note: If the discharge at the I
1
rate and criteria from the table 7 below.
Discharge current rate Time (min) cell voltage
reading
0.2*I
1
0.4*I
1
0.6*I
1
0.8*I
1
I
1
Record the cell voltages at the corresponding time indicated in column
2 in the log book.
14. Soak the battery to room temperature for up to 8 hours before
recharging.
The document reference is online, please check the correspondence between the online documentation and the printed version.
to 20 V. (pay particular attention to
1
rate is not feasible, select a different
Voltage requirement
for cells (V)
≥1.0
240
≥1.0
120
≥1.0
80
≥1.0
60
≥1.0
48
Any damage found, record defect and replace in accordance with
Repair Task 10.4.
If R 0.5 MΩ, continue at Task 7.3 step 12 (Annual maintenance).
Soak the battery to ambient room temperature,
If the requirement is not met, then continue with Task 8.1,
"Reconditioning."
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