MajorTech Digital 1000A AC Clamp Meter

This power Clamp meter operates as a True RMS Clamp Meter, Power Meter, Multimeter and AC Voltage Detector

In stock
Category: Clamp Meters
SKU: MT790

MajorTech Digital 1000A AC Clamp Meter

The MT790 is a Single and 3-Phase 1000 Amp True RMS AC Power Clamp Meter.

This power Clamp meter operates as a True RMS Clamp Meter, Power Meter, Multimeter and AC Voltage Detector. Measuring ranges include AC Current, Voltage, Frequency and Power including True Power, Apparent Power, Reactive Power and Active Power. Measures 1-Phase and balanced 3-Phase True Power (kW), Apparent Power (kVA), Reactive Power (kVAR) and Active Power (kWh), plus Power Factor and Phase Angle. Manually stores and recalls of up to 99 data logs. USB interface for connection to a PC for data logging function with included software.


  • CAT IV 600V and CAT III 1000V
  • True RMS Clamp Meter, Power Meter and Digital Multimeter
  • Ø55mm Clamp Size
  • Measures AC current up to 1000 Amps
  • Measures AC voltage to 750V
  • USB interface for PC connection for Data Log Function
  • Analysis for single phase and balanced three phase system
  • Manual data memory
  • MIN/MAX and Data Hold
  • Auto Power Off
  • Complete with Colour Coded Test Leads
  • Manually Store/Recall up to 99 Data Logs
  • Large Dual LCD Display with 9999 Count and Bar graph


Function Range Resolution Accuracy
AC Current 40A – 1000A 0.1A ±(2.0% + 5 Digits)
AC Voltage 100 – 750V 0.1V ±(1.2% + 5 Digits)
Frequency 50Hz – 200HZ 1.0Hz ±(0.5% + 5 Digits)
Temperature -50 to 1300°C 1°C ±(5.0% + 3°C Digits)
Active Power 40A-1000A, 0.01KW-750.0KW <1000KW:0.01KW,100KW:0.1KW ±(3.0% + 5 Digits)
Apparent Power 40A-1000A, 0.01KVA-750.0KVA <1000KVAr:0.01KVAr, 100KVAr:0.1KVAr ±(3.0% + 5 Digits)
Reactive Power 40A-1000A, 0.01KVAr -750.0KVAr <1000KVA:0.01KVA, 100KVA:0.1KVA ±(3.0% + 5 Digits)
Power Factor 0.3-1 cap or ind. 0.001
Phase Angle 0°-90° ±(2.0°)
Active Energy 1-9999kWh 0.001kWh ±(3.0% + 2 Digits)
True RMS Measurements ACV, ACA
AC Bandwidth 50Hz to 60Hz
Digital Display 9999
Bargraph Yes
PC Interface Yes
Records Events and Trends Yes
Data Logging Yes
Non-Contact Voltage (NCV) Yes
Overrange Indication Yes
Jaw Size 55mm
Input Impedance >10MΩ VAC
Min Max Yes
Back Light Yes
Enclosure Injection moulded case
Low Battery Indication Yes
Battery 9V
Weight 631g
Dimensions 335 x 70 x 21mm
Safety Specs IEC61010-1 CAT IV 600V

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