Casella CEL Apex personal sampling pumps - Manual (Page 12)

12
DO NOT open the battery compartment of I.S. versions in a hazardous area.
DO NOT charge I.S. battery packs in a hazardous area.
The battery pack is installed in a compartment located at the bottom rear of the instrument (Figure 4) A
captive screw locks the compartment cover.
There are two types of charger for non I.S and two
types of charger for I.S units. The single-way Fast
Charger (Part No. 182052B) and the 5-way chargers for
non I.S. use listed in Section 8.3 can be used only for
non I.S. versions. It will not charge I.S. versions.
I.S. versions must be charged only with the
single-way
I.S. Charger (Part no. 182261B) or the 5-way chargers
for I.S. use listed in Section 8.3. For compliance
reasons, these chargers accurately control current
during charging, so take a slightly longer time to charge
the battery pack. These chargers can be used with non
I.S. versions, but will take longer to achieve a full
charge.
Charging is accomplished by inserting the complete
Apex unit into a drop-in charger (see Figure 5). All
battery chargers for Apex sampling pumps are
intelligent units with a safety time-out and standby
trickle charge mode to keep the pump ready for use.
The use of modern fast charge technology enables a discharged non I.S. pack to be fully recharged within 3
hours. Depending on filter type, a 1 hour charge can give a non I.S. pack sufficient power for 8 hours
operation. Similarly, a discharged I.S. pack can be fully recharged within 4.5 hours and depending on filter
type, a 1.5 hour charge can give it sufficient power for 8 hours operation.
A two colour LED on the charger shows the charging state. A constant red indicates that charging is taking
place while a constant green indicates that the full charge is being maintained by a trickle charge. (If neither
colour is shown while the pump is in the charger, a fault condition exists.)
When an Apex unit is initially placed in the charger unit, the LED will flash red for a few seconds before
changing to constant red. If the battery has been deeply discharged, it is possible that the LED will continue
to flash red for a longer period as the charger unit tries to condition the battery before entering the fast
charge state. If the flashing red continues for a prolonged period (e.g. a few hours) then a fault condition
exists. If when an Apex unit is placed in the charger, a constant green LED is shown, remove the Apex for
at least five seconds, then re-insert it. Faster replacement may have caused a false status indication.
To ensure the maximum life expectancy of rechargeable battery packs, DO NOT allow them to remain in a
fully discharged condition for extended periods of time.
When changing dry-cells in a non-rechargeable pack, it is recommended not to unplug the connector for the
battery pack lead.
Figure 4: Battery Compartment
Sealed
battery
pack
Connector
for battery
pack lead.
3-way for non-I.S.
5-way for I.S.
Hole for
captive
screw
Padding
Battery
compartment
v04018
Battery
compartment
cover
Casella CEL
Ni-MH Battery Pack