E8500 Instruction & Operations Manual
version 1.017
Page 14 of 49
CHAPTER 4
POWER REQUIREMENTS
The E8500 Plus can run off of AC power or the internal rechargeable battery pack. It is
recommended to run the E8500 Plus off AC power as often as possible for maximum
operating time and optimal chiller performance.
Power is supplied by a rechargeable battery pack. A 110 – 240 Volt AC charger having
a 12 Volt DC / 2.5A output is supplied with the instrument. The battery charger will fully
charge the battery pack in a minimum of six hours.
A fully charged battery pack will supply power to the analyzer for approximately 3 to 5
hours of continuous operation depending on the unit’s options and utilization.
A new E8500 Plus should be charged with the unit powered off for 12 to 24 hours. It is
not suggested to charge the unit for more than 24 hours when powered off.
If the battery pack is fully discharged, charge the analyzer while off for at least 1 to 2
hours before turning the analyzer on.
You can check the condition of the batteries at any time:
1. By pressing the MEASURE key, (small font screen) and observing the battery icon,
located at the bottom of the display, in the middle, or
2. By pressing the SETUP key and observing the actual battery voltage, displayed on
the last line. When the unit is operating on battery power, the voltage displayed will vary
from an initial 8.0 to 8.4 volts (fully charged) dropping slowly to approximately 7.25 volts
(batteries nearly empty). When the battery voltage drops to 7.3 volts a “low battery”
warning will appear on the display. Within a few minutes later the instrument will
automatically turn off, to preserve the remaining battery power for the sensor bias
voltages.
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