Operating instructions

Operation PEM-9004
Teledyne Analytical Instruments 56
safer, the instrument has an efficient battery management system unit for
battery charging.
The service life of the NiCd battery can be significantly reduced
when the instrument is operated at temperatures below 5°C (40 °F).
The graphic charge-level indicator of the analyzer consists of 5
elements of a battery symbol and visually informs the user of the battery
status.
During normal use it is recommended not to recharge the battery
until it is run down completely. The battery can be recharged at any time
however, since the load management unit recognizes the charging needs
of the the battery. If the battery has sufficient capacity remaining the
load management unit may deny further recharging until the remaining
capacity drops further.
The charge-level indicator may not accurately indicatethe true
charge-level under the following circumstances:
•
The device is used outside the permitted temperature range.
•
The battery is old.
•
Incomplete charging cycles (charging/discharging) are carried
out.
If incomplete charging cycles have been used, the indicator can be
corrected by discharging the batteries by switching on the device until it
runs out of battery power and switches off automatically. Then connect
the device to the charger and start the charging function (recharging
completely takes approx. 5 hours, depending on the ambient
temperature). After active recharging is complete, the PEM-9004 will
switch off automatically. This "reconditioning cycle" can be repeated as
often as necessary.
4.11.2 Battery Replacement
For replacement of a used or dead battery, the analyzer
must be returned to the factory or authorized service facility.