Bosch CP009 User Manual download pdf (Page 143)

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Page 60

DS2020

User’s Guide

NOTICE

It is easy and simple to use the secondary signal as trigger - just connect

the probe without needle to a high tension cord. That is all.

However, since the secondary signal is easily affected by engine RPM

and engine load, the resulting waveform may be incorrect and unstable.

Therefore, it is always recommended to use the Primary signal as a trigger.

Despite all the reasons for use of primary ignition signal, sometimes it is

necessary to use the secondary trigger signal when the primary lines cannot

be found. Sometimes the lines of some DLI cars are hidden under metal

shields and plates or may be too short for proper attachment of the probe.

Trigger Signal Probe with needle Probe without needle Waveform output

Primary

CH1. Negative line

of primary ignition coil

CH2. High tension

cable to ignition plug

Primary and

Secondary (stable)

Secondary NONE

CH2. High tension cable

to ignition plug

Secondary only

(unstable)

c. Press the [ENTER] key when the cable connection is completed.

The secondary patterns will then be displayed.

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Bosch CP009 User Manual Page 143