Engine Tach; Data Holding - Surtek MUL04 Manual De Usuario Y Garantía

1. Set the rotary switch to DWELL.
2. As prompted at the LCD connect terminal, insert the red test lead into the
terminal and the black test lead into the COM terminal. Connect the ends to be
tested as illustrated.
• If the cut-off switch of an ignition system is tested, connect the red test
lead probe to the primary negative end of the ignition coil. (Refer to the
automotive servicing manual for the specific position.).
• If the GM feedback carburetor is tested, connect the red probe to the ground
terminal or the computer drive of the solenoid. (Refer to the automotive
servicing manual for the specific position.)
• If the dwell of an arbitrary ON/OFF equipment is tested, connect the red probe
to the end of the equipment, fixed with an ON/OFF switch.
3. Connect the black test lead probe to the good ground terminal of the
automobile.
4. Read the ignition dwell of the tested automobile directly from the display..
6. ENGINE TACH (ROTATION SPEED) TESTING " RPMX10" (see Fig. 6)
The RPM means the rotating frequency of the main shaft of the engine per minute.
1. Set the rotary switch to RPMx10.
2. As prompted at the LCD connect terminal, insert the red test lead into the
terminal and the black one into the COM terminal. Select an appropriate
number of cylinders. Connect the ends to be tested as illustrated.
• If a DIS ignition system without any distributor board is used in the automobile,
connect the red test lead probe to the TACH (tachometer) signal line (which
is connected to the computer DIS module of the automotive engine). Refer to
the automotive servicing manual for the specific position.
• If an ignition system with a distributor board is used in the automobile,
connect the red test lead probe to the primary negative end of the ignition
coil. (Refer to the automotive servicing manual for the specific position.).
3. Connect the black test lead probe to the good ground terminal of the
automobile.
4. Upon the start of the engine or during its operation, test the rotation speed of
the engine and read the displayed value from the display. The actual rotation
speed of the automobile to be tested should be equal to the displayed value
multiplied by 10. For example, the actual rotation speed of the engine of the
automobile should be 2000 RPM (200 x 10) if the displayed value is 200 and the
meter is set at the 6CYL (6 cylinders) notch.

7. DATA HOLDING

Under any testing circumstances, the display of the meter holds the testing result
as soon as the HOLD is pressed down. When the HOLD is pressed once more, the
testing result held in the display of the meter will be unlocked immediately and
the meter randomly shows the current testing result.
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Fig. 6