Due to the high voltages involved in secondary ignition systems, it is not possible to make measurements by direct connection; attempting to make a direct connection without attenuation can and will damage the measuring instrument.
The Pico PP178 is a capacitive pickup that connects around the insulation of an ignition circuit component such as a plug wire avoiding the need for direct connection.
Attenuated 10,000:1.
For…
Standard Ignition: clip the pickup around the coil wire (or one plug wire at a time)
Integrated coil: clip the pickup around the central location on the distributor cap
DIS: clip the pickup around one plug wire at a time
COP: clip the pickup around an HT extension lead between the coil pack and the plug
