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Fig. 30
Measuring the « inverse current,,.
Medida de la « corriente inversa ».
110
l
0
C
2
+
Vespa 125, 150 and G. L.: 6.2 -;- 7 V at 4000
revs.
Vespa G. S.: 6.8 + 7.6 V at 6000 revs.
N. B. - On remagnetized flywheels, not « yet
stabilized » the tension across the bulb is to be
considered approx. l O % in excess of that above
mentioned.
CHECKING THE RECTIFIER
If the d. c. circuit should result defective ( battery di
scharging or inefficient charging, short circuits etc),
apart from carrying out the inspections indicated in
the chapter « Fault finding and their remedies », it
is advisable to also check the efficiency of the rectifier.
This inspection consists in checking the
current which the unit permits to pass through its
elements and that of the
For checking the inverse current the fol lowing appa
ratus is necessary :
a) - D. C. moving coil voltmeter, category, l, Scale
0 to 30 V.
b) - D. C. moving coil milliammeter, category l,
Scale O to 50 mA.
c) - Variable resistance R
100 mA.
inverse »
«
through resistance
«
».
l 000 Q
Capacity
-
0
0
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