Page 72 CWT Compact Touch Installation and Maintenanace Manual Issue 13
out over time.
Verify on a regular base if the contacts are not corroded. If so the battery and the
cable should be replaced as soon as possible.
Mains powered terminal
The battery needs replacement if the yellow light on the charger on a mains
powered terminal remains lit even after a longer charging time.
7.1.2 Lead accumulators
Follow normal procedures for the handling of lead accumulators. Instructions are
usually available from the battery supplier.
Follow local regulations for the disposal of replaced batteries. Used batteries
should be returned for recycling if required according to local laws and
regulations.
Note:
The gel type, lead-acid battery supplied by Cale is maintenance free.
Verify on a regular base if the contacts are not corroded. If so the battery and the
cable should be replaced as soon as possible.
7.1.3 Battery on CPU board
In some cases, the back-up batteries on the CPU boards are causing
malfunctions (real-time clock instability, memory loss). This is caused by bad
contact between the contact springs of the battery holder and the coin cell
battery.
Caution:
It is very important that the battery is of an approved brand (Duracell, Eveready,
Panasonic, Ray-O-Vac, Sanyo, Varta, Toshiba, Seiko or another major battery
manufacturer) and that it is kept clean. Oils from fingers (i.e. fingerprints) may
together with humidity and time cause problems. Such dirt may just as well be
deposited on the underside of the positive contact spring, if a dirty battery has
been mounted in the holder.
As the holder is made from a material impervious to most industrial solvents, you
may use almost any cleaning solvent at hand (isopropyl alcohol is
recommended). Cale recommend you to wear cotton or latex gloves when
replacing batteries in order to prevent fingerprints on the battery surfaces. It is
also recommended to inspect the positive spring contact in order to establish that
it has not been bent upwards to such an extent that the pushing force has been
affected, even as it is made out of spring steel.
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