Vetus DT4.70, Руководство по эксплуатации

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57
6 Maintenance Battery, cables and connections
Every 100 operating hours.
Checking 18 electrolyte level
For conventional batteries it is required to
check the electrolyte level regularly. Re-
move vent caps (taking care no spark or
open flame is nearby) and inspect the level.
Fluid should be 10 to 15 mm (
3 /
8
” to 5 /
8
”)
above top of all plates. If necessary top up
with distilled water. Replace vent caps and
charge the battery for 15 minutes at 15 - 25
Amps to mix electrolyte.
Checking specific gravity 19
Measure the electrolyte specific gravity of
the individual cells with a commercial hy-
drometer. The hydrometer reading (see ta-
ble) indicates the state of charge. Hydrom-
eter reading of all cells should be at least
1.200 and show less than 0.050 between
high and low. If not, recharge or replace
battery. During checking the temperature
of the electrolyte should preferably be
20°C (68°F). The temperature of the electrolyte dur-
ing checking should be preferably 20°C
(68°F).
Measuring the specific gravity shortly after
water has been added results in an incor-
rect measurement. First charge the battery
to mix the added water thoroughly.
VD00119 VD00120
Specific
gravity
State of
charge
1.280 100%
1.200 50% recharge
1.120 10%
recharge
immediately
Conventional batteries
Conventional batteries