TM 5-3810-288-12
Engine not running or
Engine running fast enough to
running at slow idle
make generator * produce
DISCONNECTED METER. ENGINE COULD NOT RUN
DEAD OR DISCONNECTED BATTERY.
WITH DEAD OR DISCONNECTED BATTERY UNLESS
DISCONNECTED OR BADLY CONNECTED METER.
CIRCUIT .'AS COMPLETED AROUND BATTERY.
‚
‚ƒ
VERY LOW BATTERY CHARGE. ENGINE MIGHT NOT
WHEN METER POINTER STAYS BELOW 13.3 WITH THE
START.
ENGINE RUNNING FAST ENOUGH TO OPERATE
GENERATOR, IT SHOW'S THAT GENERATOR IS NOT
OPERATING OR VOLT- AGE REGULATOR IS OUT OF
ƒ
ADJUSTMENT, OR THAT CURRENT BEING DRAWN FROM
BATTERY BY LIGHTS, HEATER FAN, OR OTHER LOAD,
LOW BATTERY CHARGE. CONSTANT READING IN
EXCEEDS GENERATOR OUTPUT.
THIS AREA WOULD INDICATE NEED FOR CHECK ON
GENERATOR AND VOLTAGE REGULATOR.
„
WELL-CHARGED BATTERY. THIS INDICATES A
VOLTAGE REGULATOR ARE OPERATING
PROPERLY.
„…
WHEN ENGINE IS STARTED, POINTER MAY STAY IN THIS
AREA TEMPORARILY BUT SHOULD GRADUALLY RISE
ABOVE 13.3 AS GENERATOR REACHES NORMAL
…
OUTPUT.
THE POINTER MIGHT REMAIN IN THIS POSITION
TEMPORARILY WHEN THE ENGINE HAS BEEN
STOPPED AFTER CONSIDERABLE USE, DUE TO A
"SURFACE CHARGE" IN THE BATTERY. TO GET A
CORRECT READING, TURN ON HEADLIGHTS FOR A
FEW MINUTES.
THIS IS THE AREA IN WHICH THE POINTER SHOULD BE
WHEN GENERATOR, VOLTAGE REGULATOR AND
BATTERY ARE ALL IN GOOD CONDITION AND WORKING
UNDER NORMAL CONDITIONS, A 12V BATTERY IS
PROPERLY.
FULLY CHARGED AT 12.8V. A SLIGHTLY HIGHER
READING MAY OCCUR UNDER THE CONDITIONS
OUTLINED IN NO. 5 BUT, GENERALLY SPEAKING,
ANY READING ABOVE 12.8
WHEN THE ENGINE IS STOPPED IS NOT A
WHEN THE POINTER GOES ABOVE 15.2, THE VOLTAGE
TRUE READING.
REGULATOR IS SET TOO HIGH OR IS JAMMED AND
CONTINUED OPERATION OF THE ENGINE WILL BURN
OUT THE BATTERY
BOTH REQUIRE THE SAME
ME 3810-288-12/2-37
2-30
