Manual Chapter 5

9-17
Using the Model 8211 and Model 8212 Battery Chargers
Warning!
Note that if the battery is fully charged, a user is able to
initiate fast charge by pressing the “Fast” button. After
about 2 minutes, the charger will stop fast charge in this
case. However, to avoid overcharging batteries, you
should not press the “Fast” button with an already fully
charged battery.
After the “Fast” charging cycle has completed the charger beeper will
sound and automatically begin trickle charging. When this condition
begins the “Trickle” indicator light turns on indicating that the battery is
almost completely charged or is completely charged. For the laser head bat-
teries, the two conditions occur within a few minutes of each other. Charge
time from a fully discharged set of batteries to approximately a 90% voltage
charge is 15 minutes.
After the “Discharge” cycle has completed the charger automatically begins
fast charging and the “Fast” indicator light turns on. To avoid the battery
memory concern, use the “Discharge” mode when you have more than 20
minutes to charge the sensor head batteries. The typical charge cycle is as
follows:
Action Time
Press DISCHARGE button Start
DISCHARGE complete, FAST starts 7 minutes
FAST complete, TRICKLE starts – charging complete 22 minutes
NOTE: The heads can be left on TRICKLE indefinitely (until the next time they are
needed).