ADCMT 6241A User Manual

6241A/6242 DC Voltage Current Source/Monitor Operation Manual
3.2 Battery Charge and Discharge Test
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3.2 Battery Charge and Discharge Test
This section describes an example of the charging and discharging test of rechargeable batteries such as
NiCad batteries and nickel-metal hydride batteries.
The charging and discharging tests take a long time and should be executed by a system which uses remote.
However, a manual operation example using the functions of the 6241A is described.
Charge with DC constant-current and constant-voltage, and finish the charge when the current reaches below
the specified current.
Discharge with pulse constant-current, and finish the discharge when the battery voltage reaches below the
specified voltage. Set the voltage-limiter at the same polarity, and avoid overcharge and over-discharge by
setting HL value as the charge upper-limit and LL value as discharge lower-limit.
Set the Suspend voltage at the same voltage as the battery to be tested with HiZ to reduce transient current
during operating status.
Store the discharged voltage in the memory to display it after completing the test.
However, the memory can only store 8000 data items. Even if the limit is exceeded, output continues but data
is not stored.
In this case, up to a maximum of 8000 seconds (=2.22 hours) worth of data can be stored.
CAUTION:
1. Use a 4-wire connection for accurate measurement of the voltage.
2. Be careful when setting the source value and limiter value so that excessive voltage and current is not applied
against the battery’s rated-voltage and capacity.
Test conditions are described below.
Charging test: Charge with a constant current of 500 mA. After the voltage reaches 1.45 V, charge with
a constant voltage.
Stop charging when the current reaches 100 mA or less.
Charging test condition example
Source mode
Source current
Limiter
Suspend voltage
Period
Integration time
Measurement range
Memory
Comparator
External control signals
Remote sensing
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DC
500 mA
HL value; 1.45 V
LL value; 0.95 V
HiZ; 1.20 V
1 s
200 ms
500 mA range fixed
NORMAL, STORE ON
ON
Comparator lower limit value; 100 mA
OPERATE OUT; STBY IN
COMPPLETE OUT; Comp-LO
Pulse width; 100 μs
4-wire

ADCMT 6241A Specifications

General

Brand	ADCMT
Model	6241A
Category	Monitor
Language	English