EnerSys PowerSafe Data Safe, Руководство по эксплуатации и техническому обслуживанию

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www.enersys.com Publication No. US-FL-IOM-002 January 2007 Page
39
12.3 Corrective
Actions
Low electrolyte levels should be corrected by following the procedures given in Section 12.4
below.
If charger output voltage is not within the recommended voltage range, make adjustments. Then
determine the cause of the shift and correct the problem.
Keep cells clean, terminal posts and connectors corrosion-free, and grounds eliminated by
following the procedures in Section 12.1.
When cell temperatures deviate more than 5
o
F (3
o
C), from each other during an inspection,
determine the cause and correct the problem.
When the connection resistance value of any intercell or terminal connection exceeds the
installation base value by more than 20%, correct it using the procedures in Section 12.1.3.
12.4 Adding Water
Cells on charge normally show a very gradual lowering of the electrolyte level over a period of
time, due to a loss of water from the electrolyte. Hydrogen and oxygen gasses are liberated by
electrolysis as a result of charging current. Cells also lose water from normal evaporation at a
rate relative to the cell temperature and the humidity.
At regular intervals this water loss must be replaced with distilled, deionized or approved water,
so as to maintain the electrolyte level at the mid-point between the high and low level lines
marked on the jar while on float.
Cells are equipped with flame arrestors with a filling funnel. Add water through the filling funnel
by removing the dust cap, but without removing the flame arrestors from the cell covers.
The best time to add water to the stationary lead-acid battery is when the recharge or equalizing
charge is about two-thirds completed. In this condition the electrolyte should be brought up to
the high line. Water tends to float on top of the electrolyte for awhile, but the gassing action of
the latter part of the charging period will mix the water into the electrolyte. If temperatures may
possibly drop below freezing, water should be added at the start of the recharge or equalizing
charge to ensure thorough mixing with the acid solution.
Take care to keep the solution level below the top mark of the cell jar’s solution level markings
while on equalize. Overflow of solution can occur during gassing if too much water is added to
the electrolyte.
Under certain conditions some batteries may never require an equalizing charge. These
batteries may be watered when required. The mixing of the water with the electrolyte is a very
slow process, especially with the low float currents of lead-calcium cells. In these cases realistic
specific gravity readings may be obtained only after six or more weeks of charging at float
voltages.