5
CHARGER OPERATION
The CHG-50 is an intelligent,
lithium ion
battery charger. Operation is as
follows:
1. Battery packs may be charged whenever convenient:
If a battery
pack is below 90% charge level, it may be placed on the charger at any
time to recharge to 100%. Modtech Corp. lithium ion battery packs
exhibit no memory effect and need not be completely discharged before
recharging.
Battery packs that are already above 90% charge level
when placed on the charger will not be further charged
. This is
normal and intentional operation aimed at maximizing the life of your
battery packs.
2. Only acceptable battery pack types will be charged:
When a
battery pack is placed on the charger its type is detected automatically.
Only packs known and acceptable to the CHG-50 will be charged.
3. Charge temperature is controlled:
The charger will measure its
own temperature and the temperature of the battery pack. Charging
proceeds only when both temperatures are within acceptable limits. The
CHG-50 uses a thermostatically controlled fan. The fan will be enabled
and operate at a speed needed to cool the charger.
Fan speed will
generally increase as charging progresses
and the charger warms
up. A slight “ticking” sound especially at low fan speeds is normal.
4. When charging is complete,
removal of the battery pack and
unplugging the charger at your earliest convenience are recommended.
No damage will occur if a pack remains attached to the CHG-50 for an
indefinite period of time, however.
5. After unplugging the charger,
the LED may continue to flash for 10
seconds. This is normal and not a cause for concern.
6. Charging time
for a fully discharged EM-100 battery pack is
approximately 2-1/2 hours.
7. Storing batteries at 40% to 50% charge level
is good practice to
maximize battery life. When preparing to store a pack for an extended
period of time, use the fuel gauge button to see the pack’s charge level.
If the pack is above 50% charge level, it may be used for a while to
decrease the level. If it is below 40%, it may be placed on the charger.
The charger will increase the packs charge level by 10% in
approximately 12 minutes. Charge accordingly to achieve 40% to 50%.
6
8. Failure indication
is a dot-dash pattern flashed by the LED. If the
failure indication occurs with a different battery pack, the failure may be
within the charger. There are no user serviceable parts within the
charger and it must be returned for inspection and repair if needed.
MAINTENANCE AND STORAGE
Moisture, extreme heat and extreme cold should be avoided when
storing (or using) the CHG-50. Refrain from exposing the charger
to rain, snow, or moisture of any kind. When storing the charger, a
cool, dry location is best. The charger should be unplugged and
the battery pack removed prior to storing
SPECIFICATIONS
Nominal Input Power
115 VAC, 1 A, 60 Hz
Pack Types Charged
Modtech Corp. EM-100
Nominal Charging Voltage
24 VDC
Nominal Charging Current
2.4 A
Minimum Charging Temperature 0
C
Maximum Charging Temperature
45
C
Dimensions
6-1/4” x 3-1/4” x 2-3/4”
(159
x
83
x
70
mm)
Weight
29
oz.
(822
g)
