Bosch Appliances MMD 540H instruction manual Meter Functions RPM/×10RPM

MMD 540H Hybrid Multimeter Meter Functions 25

Meter Functions – RPM/×10RPM

ÑSelect the RPM range with the rotary switch.

OR

ÑSelect the×10RPM range with the rotary switch (1,000 to 12,000 RPM). Multiply the displayed reading by ten to get actual RPM.

Press STROKE / DIS button to select

through RPM for 4-stroke, RPM for 2-stroke and DIS ignitions.

Insert the inductive pickup connecting terminals into the meter.

ÑBlack lead in COM terminal.

ÑRed lead in V-Ω-RPMterminal.

Connect the inductive pickup to a spark plug wire. If no reading is received, unhook the clamp, turn it over and connect again.

NOTE:

ÑPosition the inductive pick-up as far away from the distributor and the exhaust manifold as possible.

ÑPosition the inductive pick-up to within six inches of the spark plug or move it to another plug wire if no reading or an erratic reading is received.

RPM 4: For RPM of 4-stroke engines which have 1 ignition on every 4 engine strokes

RPM 2: For RPM of DIS ( Distributorless lgnition System) & 2-stroke engines which Have 1 ignition on every 2 engine strokes

NOTE: The rpm pick-up has an adjustable sensitivity switch that can also be used to correct an unstable reading.

MMD 540H Instruction Manual Version 1 February 2008 Robert Bosch LLC