Voltage Drop Measure At The Starting; Recharge System Measurement - tecnotest 138-E Manuel D'utilisation

TIMING LIGHT ___________________________________________________________________________
4.4 -

Voltage drop measure at the starting

•
Press the TESTS (6) button to switch the DWELL reading to the volt/peak volt
reading; the Dwell led (5) turns off while the Volt led (7) turns on thus
indicating that the Volt/Peak volt display has been enabled.
•
Connect the red clamp (16) of the volt cable to the battery positive pole.
•
Disconnect the wire of the contact breaker (coil) in order to avoid the starting of
the engine.
•
Try to start the engine for about 10 sec. and read on the display the voltage drop.
The value for 12 V system must not results under 9.6 Volts. A too low voltage means:
•
A discharged or faultly battery.
•
An excessive absorption of the starting motor.
4.5 -

Recharge system measurement

•
Press the TESTS (6) button to switch the DWELL reading to the volt/peak volt
reading; the Dwell led (5) turns off while the Volt led (7) turns on thus
indicating that the Volt/Peak volt display has been enabled.
•
Connect the red clamp (16) of the volt cable to the battery positive pole.
•
Start the engine and run it to a rating of about 3000 r.p.m.
•
Read the recharge voltage of the dynamo or alternator (generator).
•
By keeping for a few minutes the indicated r.p.m. rating you can see the correct
working of the regulator, whenever the voltage of the battery increases.
•
Switch on devices (such as light, windscreen, wiper, heating motor etc..) and
check the holding of the values.
Approximate values of the recharge voltage:
•
12 V system: 13.8 ÷ 15.2 Volt.
38 SERVICE MANUAL