Using The Voltmeter To Test Battery State Of Charge - Schumacher Electric DSR PROSERIES DSR125 Owner's Manual

12. OPERATING INSTRUCTIONS
OVERVIEW
Connect AC power and set the front panel
ON/OFF switch to the ON position.
The switch will illuminate. Then select
an unused charging outlet from the four
available. Connect the battery, following
the precautions listed under sections 6
and 7. Select the appropriate
Voltage and
START to begin charging.
As charging begins, the Battery Voltage,
Type and Display settings are saved. Then,
whenever the unit has been off and AC
power is reapplied for 10 minutes and no
buttons are pressed, charging of the battery
will resume with the saved settings from the
last charging cycle.
DISPLAY
Following power-up, the display turns off
after 1 minute or 1 minute from the last key
press or connection to a battery. With the
display off, any button press (other than a
display button press) will turn the display
on for one minute or one minute from any
subsequent key press or clamp connection.
Also, with the display off, connecting the
station cable clamps to a battery will show
the battery voltage and keep the display
on for one minute or one minute from any
subsequent key press. However, with the
display off, if the display button turns the
display on, the display will remain on until
power-down. If the display button turns the
display off (see Display Mode Button, in
Section 10), then the above scenario, with
the display off, once again applies.
CHARGING
When charging begins, the yellow/orange
Charging LED will be lit.
COMPLETION OF CHARGING
Charge completion is indicated by the
green Charged/Maintaining LED.
When lit, the charger has stopped
charging and has switched to Maintain
Mode of operation.

13. USING THE VOLTMETER TO TEST BATTERY STATE OF CHARGE

OVERVIEW
The charger has a built in voltmeter to
test your battery's state of charge. The
charger does not have a built in load
tester. As such, a recently charged battery
could have a temporarily high voltage due
to what is known as "surface charge". The
voltage of such a battery will eventually
drop during the period immediately after
the charging system is disengaged.
Battery
Battery Type and press
ABORTED CHARGE
If charging cannot be completed normally,
charging will abort. When charging is
aborted, the charger's output is shut off.
The display will show "BAD BAT" and an
error code. See section 15, Troubleshooting
and Error Codes. To reset after an aborted
charge, press the START/STOP button to
turn the charger off.
RECOVERY MODE
(Non-lithium ion batteries only)
If a battery is left discharged for an
extended period of time, it could become
sulfated and not accept a normal
charge. The charger will detect this and
automatically enter Recovery mode.
When this mode is activated, the display
will read "BAD BATT REC". The display
will revert to normal operation when
normal charging begins after the battery is
recovered. Recovery Mode could take up
to 10 hours. If it fails, charging will abort
and the display will read "BAD BAT F02".
For more information, see section 15,
Troubleshooting and Error Codes.
MAINTAIN MODE
When the green
LED is lit, the charger has started Maintain
Mode. This mode of operation is known as
Float Mode Monitoring. In this mode, the
charger keeps the battery fully charged by
delivering a small current, when necessary.
The voltage is maintained at a level
determined by the battery type selected.
GENERAL CHARGING NOTES
• The board-mounted fans run, based on
the corresponding board temperature.
• If the charge mode is changed after
charging has started (by pressing the
Battery Voltage or
the charging process stops and begins
again automatically at the new selection.
• The voltage displayed during charging is
the charging voltage and usually will be
higher than the battery's resting voltage.
Consequently, the tester could display
inconsistent values for such a battery.
For a more accurate reading, the surface
charge should be removed by temporarily
creating a load on the battery by turning
on the lights or other accessories.
The battery tester is only designed to test
6V and 12V batteries. Testing a device
with a rapidly changing voltage could yield
unexpected or inaccurate results.
• 8 •
Charged/Maintaining
Battery Type button),