24
REF 360-0040-01 (F)
SECTION FOUR
MAINTENANCE
4.1 Battery Maintenance
The GilAir-3 and GilAir-5 air sampling pumps use re-
chargeable Nickel-Cadmium or Nickel-Metal-Hydride
batteries that must be fully charged and properly
maintained to achieve maximum pump run time. The
battery pack may be charged separately or while in-
stalled on the pump.
WARNING
Do not clean, open case, charge or replace battery while
in an explosive atmosphere.
Battery packs are charged through a built-in jack, on
the side of the battery pack. Note: The charging plug
is polarized to prevent improper insertion.
CAUTION
Do not short the battery terminals or the charging jack.
Shorting will result in irreversible damage to the battery
pack.
• Memory Effect
Nickel-Cadmium batteries will develop reduced capac-
ity when they are not fully discharged and then fully
recharged after sampling. Memory effect takes time to
develop and can usually be eliminated by performing
two complete discharge/recharge cycles on the pump.
• Leakage Current
Nickel-Cadmium and Nickel-Metal-Hydride batteries
always have a small internal leakage current. If the
battery pack has been removed from the charger for
more than two days without use, it will require addi-
tional charging to restore it to full capacity. This pro-
cess can be repeated two or three times without caus-
ing signs of memory effect in a Nickel-Cadmium Bat-
tery.
• Chargers
NOTE
See Battery/Charger compatibility matrix in Appendix A:
Parts List.
Single Station Charger
A dual rate charger that can be switched from con-
stant-rate charge to trickle charge.
Universal Multi-Station Charger
A dual rate charger offering five-station timed con-
stant-rate charging that automatically defaults to trickle
charge.
BMS Multi-Station Charger
WARNING
DO NOT use the BMS-200 charger to
charge ATEX battery version pumps.
Use ONLY the BMS II-100CE model with ATEX
battery models to pervent permanent
damage to the batteries.
A five-station charger offering timed charging that de-
faults to a trickle charge in either a constant-rate
charging mode or two diagnostic modes.
NOTE
The BMS Multi-Station Charger has a single and double
discharge mode (Single Evaluation and Double Evalua-
tion) designed to enhance the performance of Nickel-
Cadmium batteries. Excessive use of these discharge/
charge features will needlessly shorten battery life. We
recommend use of the Double Evaluation mode for
maintenance only (maximum once monthly) for use with
Nickel-Cadmium batteries. These modes offer no advan-
tage with Nickel-Metal-Hydride batteries.
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