Yamaha WaveRunner GP1200R, Руководство по обслуживанию

Страница: 158 / 245

7-8
E
– +
ELEC
ELECTRICAL ANALYSIS
Low resistance measurement
NOTE:
●
When measuring a resistance of 10
Ω
or
less with the digital tester, the correct
measurement cannot be obtained
because of the tester’s internal resistance.
●
To obtain the correct value, subtract the
internal resistance from the displayed
measurement.
●
The internal resistance of the tester can be
obtained by connecting both of its termi-
nals.
Correct value =
Displayed measurement –
Internal resistance
Peak voltage measurement
NOTE:
●
When checking the condition of the igni-
tion system it is vital to know the peak
voltage.
●
Cranking speed is dependant on many
factors (e.g., fouled or weak spark plugs, a
weak battery). If one of these is defected,
the peak voltage will be lower than speci-
fication.
●
If the peak voltage measurement is not
within specification the engine will not
operate properly.
●
A low peak voltage will also cause compo-
nents to prematurely wear.
Peak voltage adaptor
NOTE:
●
Throughout this chapter the peak voltage
adaptor’s part number has been omitted.
Refer to the following part number.
●
The peak voltage adaptor should be used
with the digital circuit tester.
Peak voltage adaptor:
YU-39991/90890-03169