This current clamp is ideal for use with automotive oscilloscopes for measuring currents between 10 mA and 60 A. This enables the DSO to display current waveforms for fuel injectors and fuel pumps. The current clamp has two calibration settings, set by a slider switch on the handle of the probe. 1 mV/10 mA (100 mV = 1 A) — use this for testing currents up to 20A. 1 mV/100 mA (10 mV = 1 A) — use this for testing current up to 60A. In use there is no need to break into the circuit or disturb the isolation as the opening jaws simply clamp around the current carrying conductor. No electrical contact is required.