Lutron Mini Clamp CM9940 is a compact, auto ranging digital clamp multimeter designed to measure both alternating current [ACA] and direct current [DCA] up to 600A.
Features :
- Design meet IEC 1010 CATIII 600V safety requirment.
- 4000 counts, Auto range & multi-functions.
- Measurement for ACA, DCA, ACV, DVC, Ohms, Diode, Hz, Continuity beeper.
- Water resistance for the front panel.
- Data hold.
- Wide ranges { 600 A, 400 A } clamp on current measurement both for ACA & DCA.
- Overload protection circuit is provided for all range.
- LSI circuit provides high reliability and durability.
- Pocket & slim housing case, easy carryout.
- Compact & heavy duty ABS housing case.

General Specifications :
- Display : 10.8 mm {0.43″} LCD, 4 digitas, Max. indication 5000.
- Measurement range : ACA, DCA, ACV, DCV, ohms, Diode, Hz, Continuity beeper, Relative.
- Polarity : Automatic switching, ‘-‘ indicates negative polarity.
- Current sensor : Hall effect sensor.
- Zero Adjustment :
- DCA : Push bottom adjustment.
- Other ranges : Automatic adjustment.
- Over input : indication of ‘1’ or ‘-1’.
- Sampling Time : Approx. 0.35 second.
- Battery : 2 x 1,5V AA { UM-3 } batteries.
- Operating Temperature : 0 to 50 C { 32 to 122 F }