QB-2 measures shot time and quick break on 3 phase mag units..it will also measure shot time and quick break on single phase full wave DC units with contactor drop out on coil circuit, but quick break is normally required to be tested only on 3 phase units.
Features:
* The new industry standard reference for quick break detection
* Provides actual digital readout of quick break voltage, which is much more accurate than traditional “go/no go” flashing LED or neon bulb detectors
* Allows you to verify actual quality of the quick break, to warn you when contactor springs or other components may be wearing out
* Meets mil spec M-6867C
* State of the art microprocessor control analyzes quick break pulse waveform
* LCD display with large easy to read digits
* Powered by 9V battery
* Low battery indication
* NIST traceable calibration
