Operation; Charging The Batteries - AEMC 6550 User Manual

4.1 Charging the Batteries

NOTE: When using the instrument for the first time, start by fully charging the batteries. Charging must be
conducted at a temperature between 32° and 86°F (0° and 30°C).
To charge the batteries:
1. Set the rotary switch to the OFF position.
2. Connect the power cord.
SET-UP
V RAMP
V FIXED
During the charging, the instrument displays the following information:
Battery 1
2% Charging
12.4 V
1953 mA
26.4°C
00:05:30
Battery 2
3%
11.7V
13 mA
26.7°C
00:05:20
Charging time: Between 6 and 10 hours, depending on the initial charge condition.
When the instrument is switched-on, the battery state information is accessible by pressing the HELP button
followed by TEMP button. Following prolonged storage, the batteries may be completely discharged. In this
case, the first charge may take longer.
It is possible to charge the instrument during operation. In this case the
The charging current then depends on the test voltage and on the resistance measured. If the power necessary
for the measurement approaches 10W, the batteries are not charged.
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4. OPERATION

MR
Step
Voltage
V VAR
OFF
The percentage charge of each of the batteries, their voltages, their
charging currents, their temperatures, and the charging times.
To reduce the power to be supplied and make it possible to use the
instrument during the charging, the batteries are charged alternately
at 2A for 10 seconds. It is for this reason that the charging current
varies.
The text on the side indicates:
■ Charging = battery being charged
■ Full = battery fully charged
■ Cold = battery too cold to be charged
■ Hot = battery too hot to be charged
■ Defect = battery faulty (must be replaced)
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> 90 V
AC
< 260 V
AC
50/60 Hz
symbol flashes.
Megohmmeter Models 6550/6555
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