•
‘POWER/CLEAR’ button:
Pressing the ‘POWER/CLEAR’ button clears all digital readout values, and re-scales
the gauge if necessary.
•
‘MODE’ button:
Pressing the ‘MODE’ button once will open the mode menu, and highlight the measurement
mode currently selected; pressing the ‘MODE’ button again while the menu is open will
select the next available measurement mode. All four measurements (spark burn time,
RPM, spark plug peak voltage and dwell angle and ramp time) are simultaneously tracked
and stored, and are available for viewing at any time (without delay).
•
‘HOLD’ button:
Pressing this button will pause measurement, and hold the display in the current
condition. Pressing the ‘HOLD’ button again will resume normal measurements.
6.4 Waveform view
This mode displays the signal amplitude over time (like an oscilloscope). The scale and
units of the measurement are located on the vertical axis, at the far left of the display. The
time scale and units are shown below the horizontal axis, at the bottom of the screen.
01607
RPM
-10
10
20
kv
-4
-2
0
2
ms
0
Fig. 9 - Waveform display
•
‘POWER/CLEAR’ button:
Pressing the ‘POWER/CLEAR’ button clears the graph, and re-scales if necessary.
•
‘MODE’ button:
Pressing the ‘MODE’ button once will open the mode menu, and highlight the
measurement mode currently selected; pressing the ‘MODE’ button again while the
menu is open will select the next available measurement mode. The waveform graph
focuses on the area of the spark waveform which is most relevant to the mode selected.
•
‘HOLD’ button:
Pressing this button will pause the current measurement, and hold the display in the
current condition. Pressing the ‘HOLD’ button again will resume normal measurement.
7. MEASUREMENT PROCEDURES
Page 10
CAUTION
To avoid personal injuries and damage to the instrument carefully inspect the spark plug
wires, distributor cap, ignition coil, ignition modules and all other ignition system parts for
damage or leaks, and avoid using the instrument in case any damage or leaks are found.
Never touch the sensor, flexible probe or cable 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, muffler, catalytic converter, etc.).
