Engine Tach/Rotation Speed - LIMIT 500 Auto Manual De Instrucciones

Engine tach / Rotation speed
1. Set the rotary switch to RPMx10 position and correct numbers of
cylinders.
2. SInsert the red test lead into the V_RPM terminal and the black
test lead into the COM terminal.
3. Connect the red test lead to the ignition coil and the black test
lead to ground as fig 4.
4. Start the engine and read the rotation speed on the display. The
reading must be multiplied by 10.
For example, actual rotation speed is 2350 RPM, the display shows 235.
Test of switches, fuses, solenoid, relay etc.
1. Set the rotary switch to 200 Ω.
2. Insert the red test lead into the Ω terminal and the black test lead
into the COM terminal.
3. Short circuit the red and black test leads. The display should
show 0,2 to 0,5 Ω.
4. Connect the test leads parallel to the component which would be tested.
The impedance of most solenoids and relays is less than 200 Ω.
Fuses and switches have impedance around 10 Ω or less. Displays
1, the component is cut off or the rotary switch is in incorrect position.
Ignition coil test
Before testing the engine must be cold and cut off the ignition coil.
1. Set the rotary switch to 200 Ω.
2. Insert the red test lead into the Ω terminal and the black test lead
into the COM terminal.
3. Short circuit the red and black test leads. The display should
show 0,2 to 0,5 Ω.
4. Connect the red test lead to the ignition coils primary + pole and
the black test leads to the primary - pole as fig 5. The resistance
should be less than 0,5 Ω.
(see fig 5)
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(See fig 4)