• Measuring current flow with a DMM gives an average current flow readout.

• Making a current flow measurement using a Clamp-on Adapter connected to a labscope will reveal millisecond-to-millisecond current changes.

• For measuring current in rapidly changing circuits such as the starter motor or pulsed circuits such as fuel injectors or ignition coils the labscope is the tool of choice.

There are two types of Clamp-on Adapters:

1. High Amp: Reads whole amps, usually up to several hundred amps.
2. Low Amp: Reads fractions of an amp, usually in tens of milliamps.

A High-Amp Clamp-on Adapter connected to a Labscope can be used to make a Relative Compression Test in just two seconds of cranking.