LAMAR BETA D-50 Operating Manual - page 17
4. DETAILED OPERATING INSTRUCTIONS
D.
CONNECT BATTERY
Connect the battery DC cable to the battery and
ensure the connector is plugged in completely.
E.
SWITCH ON MAINS POWER
Turn on the AC on-off/reset power switch. An
audible alarm sounds, and the Accept lamp
illuminates. Meters read all 6's or 8's.
F.
VIEW AND SET CUTOFF VOLTAGE
a. Press and hold the View Voltage Cutoff
button. The set cutoff voltage is shown on the
voltmeter display.
b. Use a 1/16 inch (2 mm) slot blade precision
type screw driver to adjust the cutoff voltage
to the desired level.
NOTE:
Actual cutoff voltages are slightly lower than the set nominal voltage in
order to give the battery an "accept advantage" and allowing the operator to
observe a marginal battery and decide its acceptance or rejection. The actual
cutoff value also depends on how fast the battery voltage is changing. Of
course, the higher the voltage at acceptance, the better the battery.
4.6 SETTING DISCHARGE CURRENT
The discharge current in amperes is normally set equal to, or 80% of, the battery
nominal 1-hour capacity rating (please refer to the battery manufacturer's maintenance
manual). For example, a SLAB battery with a 30 ampere-hour 1-hour capacity rating
would be tested with the discharge current set to 24 amperes.
Before setting the discharge current the Beta D-50 must have been connected to the
battery (see section 4.5) and the AC power switch must have been turned on.
BETA D-50 TESTER / ANALYZER - OPERATING MANUAL V2.2
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