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3. Measuring operations
3.1. Measure engine revolutions:
Press button
{3}
in addition
with 4 cylinder Otto engines
or with 2 rotor Wankel engines
Press button
.
Press buttons
and
or with 6 cylinder Otto engines
—_— press button ()
Lower revolutions e.g. idling speed revolutions are shown on
scale
49. With engine speeds greater than 1150 + 50 1/min
{rpm) the appliance automatically switches over to the 0 - 8000
1/min (rpm) range on scale
3.2. Measure dwell angle:
Press button
@
in addition
with 4 cylinder Otto engines
or with 2 rotor Wankel engines
or with 6 cylinder Otto engines
Press button (8)
Press buttons 8) and 63
Press button
Q)
The lights 2) or Q@2 show on which scale the dwell angle is
to be read off.
3.3. Check ignition firing point (basic setting):
As for measuring the revolutions press button (8) and button
(8) 6) or ©.
Pull the troboscopic lamp out of the holder and aim it on the
crankshaft pulley or on the fan wheel and switch on with
button
©
'
The firing point.is then correctly set, when the marking on the
rotating part aligns with the stationary reference mark.
Note the information and technica! data in the Workshop Manual.
The knurled wheel
(2 has no function during this measuring
operation.
3.4. Measure ignition advance angle:
Before measuring the ignition advance angle the firing point
(3.3.) is to be checked and if necessary corrected.
Press button
©
in addition
with 4 cylinder Otto engines
press button (8)
press button 8) and 6a
press button Q)
or with 2 rotor Wankel engines
or with 6 cylinder Otto engines
Set the engine revolutions (for centrifugal advance) or vacuum
(for vacuum advance) in accordance with the details in the
Workshop Manual.
Pull the stroboscopic lamp out of the holder, aim it on the
crankshaft pulley or on the fan wheel and switch on with
button
Adjust the knurled wheel
2
until the marking on the rota-
ting part aligns with the stationary reference mark. Read off
ignition advance angle from scale
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