Bosch 540H User Manual download pdf (Page 26)

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

Meter Functions – RPM/×10RPM

Select the RPM range with the rotary

switch.

Select 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.

Black lead in COM terminal.

Red lead in V-Ω-RPM terminal.

Connect the inductive pickup to a spark

plug wire. If no reading is received, unhook

the clamp, turn it over and connect again.

NOTE:

Position the inductive pick-up as far away from the distributor

and the exhaust manifold as possible.

Position 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.

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Bosch 540H User Manual Page 26