23
Gilian
®
GILAIR-3 & GILAIR-5 AIR SAMPLING SYSTEMS
Sensidyne Document No. 800880M (Rev E)
SECTION FOUR
BATTERY MAINTENANCE
4.1
SERVICE OVERVIEW
Battery packs for Gilian air sampling pumps are re-
chargeable Nickel Cadmium batteries. They must be
fully charged and maintained properly to achieve maxi-
mum pump run time. It is incumbent upon the pump
user to ensure that the battery has enough charge to
complete the intended run time.
Rechargeable Batteries
• GilAir-3: 4.8 Volt, 1.8 Ampere-hours
• GilAir-5: 6.0 Volt, 1.8 Ampere-hours
The battery packs for the GilAir-3 and GilAir-5 are
charged through a built-in jack, on the side of the bat-
tery pack. The batteries may be charged while in place
or while removed from the sampler. Note that the
charging plug is polarized to prevent improper inser-
tion.
Do not short the battery terminals or the charging
jack. Shorting will result in irreversible damage to the
battery pack
.
NOTE
Battery packs for South African versions are customer
supplied. These must be rated 4.8V, 1.8 ampere-hours.
Table 4.1
Estimated Battery Life
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g
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6
–
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5
.
1
–
1
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3
–
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2
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5
.
2
–
5
.
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2
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4.1.1
Battery Life
Battery life is usually measured in charge/discharge
cycles. Gilian battery packs are capable of providing
between 300 and 500 charging cycles. Since this is
very difficult to track over the life of the battery, the
following guide will help you to anticipate how long
the battery should last.
The estimated battery life is based on proper battery
maintenance. The best way to ensure maximum bat-
tery life is to track daily pump usage and only charge
the battery pack when necessary.
4.1.2
Memory Effect
Nickel-Cadmium batteries will develop reduced capac-
ity when the user does not maintain the practice of dis-
charging or charging fully during the sampling process.
Memory effect takes time to develop and usually can
be eliminated with two discharge/charge cycles
(Double Evaluation mode on the BMS charger).
4.1.3
Leakage Current
Nickel-Cadmium 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 additional charging to restore it to full ca-
pacity. This process can be repeated two or three times
without causing signs of memory effect.
Summary of Contents for GILAIR-3
Page 29: ......
