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2.1. Transport, storage
Low maintenance STM batteries
are delivered filled with electrolyte
and electrically discharged. It is
normal that the electrolyte level is
not visible after a long storage
and transport period, even in the
monoblocks STM 5-100 MR and
5-140 MR. It will become visible
during charge (refer to chapter 4).
Depending on customer
specifications, low maintenance
STM monoblocks can be
delivered completely assembled
into batteries, partly assembled,
or as a kit of monoblocks and
accessories.
In the latter two cases, to avoid
any spilling of electrolyte during
transport, the monoblocks are
fitted with transport plugs.
&
Never drain the electrolyte in
the monoblocks
The battery units can be stored
in whatever their state of
charge. After a storage period
of more than one year, it is
necessary to carry out a
commissioning charge before
use (see chapter 4.2.)
2.2. Water and electrolyte
The water and electrolyte used
in Saft Ni-Cd batteries must be
chemically pure.
Under normal operating
conditions, it is neither necessary
nor possible to change or add
electrolyte (KOH).
It is only a matter of readjusting
water that was consumed during
overcharges, in adjusting the
levels regularly (see chapter 6.2.).
&
If monoblocks have lost their
electrolyte by accident
(drop,
spills, mishandling, etc...)
it may be necessary to
replenish the electrolyte.
This can only be done in a
Saft factory by Saft specialists.
Please contact us without fail.
&
Measuring the electrolyte
specific density
The low maintenance STM
monoblocks that are equipped
with a centralized filling ramp
should be considered sealed.
Measuring or reconcentrating the
electrolyte density is impossible.
2.2.1. Water quality
lt is absolutely necessary that
chemically pure water, distilled
or demineralized, is used for
topping-up (see appendix 9).
Prevent the use of tap water as
it contains impurities, that will
adversely effect the electrolyte,
operation quality, and the useful
life of the monoblocks. Store
water in hermetically sealed
plastic containers.
2.2.2. Harm caused in using
sulfuric acid or acidious water
Sulfuric acid (as it is used in
lead- acid batteries) seriously
damages alkaline batteries.
Never put sulfuric acid in nickel-
cadmium batteries.
Also prevent the use of topping-up
water recommended for lead-acid
batteries since it may contain
sulfuric acid.
When in doubt about water
purity, effect a litmus test (or
equivalent).
&
Never check or top up the
batteries with instruments used
for lead-acid batteries
2. Precautions and practices
Summary of Contents for STM 5-100
Page 1: ...Technical manual installation operation and maintenance for Ni Cd STM MR MRE monoblocks type ...
Page 23: ...Appendix 1 20 Monoblock STM 5 100 MR G RD equipped Positive left Filling right ...
Page 24: ...21 Appendix 2 Monoblock STM 5 100 MRE G RD equipped Positive left Filling right ...
Page 25: ...Appendix 3 22 Monoblock STM 5 140 MR G RD equipped Positive left Filling right ...
Page 26: ...Appendix 4 23 Monoblock STM 5 140 MR D RG equipped Positive right Filling left ...