Tecnotest STARGAS 898 LIGHT Manual Operativo página 38

STARGAS _______________________________________________________________________________
The rpm reading can be carried out by suing the RPM cable from the electric lighter
(option) or the cable with induction clamp (option). The latter is set to 4-time engines,
but can be set to 2-time/DIS engines too.
ATTENTION:
At the end of measurement disconnect the RPM cable from the battery and
short circuit the clamps one another to avoid the display of a wrong rpm due
to the high sensitivity of the system. If a RPM cable from car lighter is used
(option) short circuit it through the special hook connected to it.
If during the tests with induction clamp the revolution number is unstable (showing a
trend towards anomalous values), probably some parasitic signals or some other signals
coming from the ignition system of the other non concerned cylinders get into the
induction clamp.
The reasons for these drawbacks are numerous, for instance:
•
Spark plug contacts blinked with an excessive resistance.
•
Coil high output.
•
Excessive distance of the spark plug electrodes.
•
Spark plug cables too close one another and non perfectly insulated.
•
Humidity of the cables, of the spark plugs, etc...
In case of tests on motorcycles with mechanic ratio gearbox we suggest the use of the
2035 (52) revolution counter with antenna setup for measurement on 4-stroke engines.
ATTENTION:
Check that no electrical discharges occur between the spark plug cable and
the clamp, which could seriously damage the tool.
34 OPERATING INSTRUCTIONS