User`s guide

Chapter 17: Battery Option
167
If the battery pack discharges to a very low level, the control will issue an
audio-visual warning. The beeper will “chirp” a rapid succession of tones a
lower case letter “e” (for “empty”) will be displayed on the gas gauge
indicator, and the message “BATTERY VERY LOW” will appear on the bot
-
tom half of the LCD readout.
If you receive this warning, it means that the control will likely lose power
within 10 minutes and one of the following three courses of action should
be immediately taken:
1. Attach the battery charger to the controller and plug it into an AC wall
power outlet. The control will then continue to run normally, but the
battery won’t begin charging properly until the control’s power switch
is turned off.
2. Set up and begin using a backup controller after turning off the dis-
charged control.
3. Turn off the control and replace the discharged battery pack with one
that is fully charged. The bottom panel has a removable tray that
allows quick access to the battery pack for easy inspection or replace
-
ment.
Using and recharging battery
controls
• Operating ambient temperature range: 0° F to +140° F. (-17.7° C to
+60° C)
• Operating time: eight hours minimum, under typical conditions.
• Charging ambient temperature range: +32° F. to 104° F (0° C to
+40°C)
• Charging time from full discharge to full charge: ten to 12 hours.
The battery pack supplied in the MP-70/50 control has been factory con-
ditioned and maintained for peak performance. To keep the battery in top
condition and maximize its life and charging capacity, take some time to
get acquainted with - and abide by - the following care and safety recom
-
mendations: