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CZ sincro
DG83 D
The unit can be used as a stroboscopic RPM counter for measuring at a
distance and without any reflectors, RPM on Diesel and petrol engines and of
any rotating parts, where it is not possible to pick up any synchronizing
signals.
7.1 With the engine stopped, trace with a white chalk a reference line on
the pulley or other rotating parts. Press key
RESET
to set the RPM
measurement and immediately after press key
2
4
. Release key
RESET
and keep key pressed until number
60 60
60 60
60
appears on display 1.
The timing light will flash automatically.
7.2 Through key C + /– set the RPM number on display 1 as close as
possible to the engine speed estimated. Direct the flash towards the
pulley and increase or decrease the RPM number displayed until the
pulley rotation seems progressively slowing. The correct RPM is reached
when the pulley appears still.
NOTE
The pulley could appear still even when the flash frequency is half,
double or triple of the real RPM. In these latest 2 cases, the traced line
would appear as shown in Fig. 19.
A halved frequency would cause a wrong rotation speed.
At engine speeds between 4500 ÷ 6000 RPM, use the stroboscope for
3 ÷ 5 minutes with 1 minute interval to avoid overheating.
Fig. 20
TDC
Fig. 19
12 V
Black
Red
Fig. 18
FLASHING FREQUENCY AND
VIEWING OF MARKS
ON THE PULLEY
A ) Correct
frequency
B )Double
frequency
C ) Triple
frequency
7.0 STROBOSCOPIC RPM COUNTER
STROBOSCOPIC RPM MEASUREMENT
V
2
4
RESET
STROBOTESTER DG 83- D
min.
V=
2
4
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