Multinorm/FonS/Poly
9
1.6 New battery cells or cells unused for a longer period
Unpredictable chemical processes can occur during charging of new battery cells
or cells that were unused for a longer period (more than 3 months). Ni-MH and Ni-Cd
battery cells are affected to capacity degradation (sometimes called as memory effect).
As a result the instrument operation time can be significantly reduced.
Recommended procedure for recovering battery cells:
Procedure Notes
Completely
charge
the battery.
At least 16h with in-built charger.
Completely
discharge
the battery.
Can be performed with normal work with
the instrument.
Repeat
the charge / discharge cycle for at
least
two times
.
Four cycles are recommended.
Complete discharge / charge cycle is performed automatically for each cell using
external intelligent battery charger.
Notes:
•
The charger in the instrument is a pack cell charger. This means that the battery
cells are connected in series during the charging. The battery cells have to be
equivalent (same charge condition, same type and age).
•
One different battery cell can cause an improper charging and incorrect
discharging during normal usage of the entire battery pack (it results in heating of
the battery pack, significantly decreased operation time, reversing polarity of
defective cell,…).
•
If no improvement is achieved after several charge / discharge cycles, then each
battery cell should be checked (by comparing battery voltages, testing them in a
cell charger, etc). It is very likely that only some of the battery cells are
deteriorated.
•
The effects described above should not be mixed with normal decrease of
battery capacity over time. Battery also loses some capacity when it is repeatedly
charged / discharged. The actual decrease of capacity versus number of
charging cycles depends on battery type and is provided in the technical
specification from battery manufacturer.
1.7 Periodic calibration
It is essential that the instrument and its probes are calibrated regularly. We
recommend that calibration of the instrument and its probes is carried out once per year
if there are no different recommendations for specific probe. Please contact your Metrel
distributor for further information on calibration.
1.8 Cleaning
Use soft patch, slightly moistened with soap water or alcohol, to clean the surface
of the instrument and leave it to dry totally, before using it.
