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3.4 Measurement Procedures
CAUTION
To avoid personal injuries and damage to the instrument carefully inspect the
fuel injection lines and fuel pump for damage or leaks, and avoid using this
instrument in case any damage or leaks are found. Never touch the
piezoelectric sensor during a test. Wear insulating gloves when working around
high voltage, and hot parts, and keep away from moving parts (fan, drive belts,
etc) and hot objects (exhaust manifold and pipes, muf
fl
er, catalytic converter, etc.)
1- Clamp the piezoelectric pickup onto a clean un paint ed section of any diesel injection
pipe. Do not over tighten the thumb screw (see Fig. 3)
2- Clip the alligator ground clip onto a clean unpainted section of the same injection line.
3- Connect the forked terminal to the piezoelectric pickup.
4- Turn the instrument on.
5- If necessary change the number of cycles to match the engine under measurement
by pressing the
(Number of cycles) button repeatedly until the display shows the
correct setting.
4- Start the diesel engine.
6- Read the RPM on the display.
Fig. 3 - Piezoelectric sensor and ground clip on fuel line
Fuel injection line
Piezoelectric sensor
Ground clip
Thumb screw
