We specialize in Current Sensors, CT Sensors, and Measuring Instruments.

AC/DC Clamp Meter/Leakage Clamp Meter

M-270+ AC/DC Digital Clamp Tester (CE)55mmφCT, ACA, ACV/True rms, DCA, DCV, Hz, Ω

AC/DC Current, 40A/400A/2000A, True rms reading, 55mmφ CT (CE)


Wide current measurements with tear drop type 55mmφCT up to 2000A.
True rms reading for ACA and ACV.
Data-hold and Auto power off function.
Additional AC/DC voltage, resistance, diode test, continuity check.
Auto zero adjustment for DC current offset.
Conform to IEC safety requirements.
Measuring method Dual slope integration mode
AC Conversion True rms responding
Display 3.5 digit LCD, max. reading of 3999
Maximum input AC(50/60Hz)A
DC A:AC/DC 2000A(within 3 second)
600V rms
Ω:Input protection
250V rms
(within 10 second)
Accuracy (23℃±5℃, 80%RH or less)
Function/Range/Resolution/Accuracy/Max. input
ACA(50/60Hz) DCA Manual range/40A/0.01A/±2%rdg±8 dgt/AC/DC2000A
ACA(50/60Hz) DCA Manual range/400A/0.1A/±1.5%rdg±8 dgt/AC/DC2000A
ACA(50/60Hz) DCA Manual range/2000A/1A/±1.5%rdg±8 dgt/AC/DC2000A
ACV(50/60Hz) DC V Auto/Manual range/400mV/0.1mV/±1.2%rdg±8 dgt/AC/DC 600Vrms
ACV(50/60Hz) DC V Auto/Manual range/4V/0.001V/±1.2%rdg±8 dgt/AC/DC 600Vrms
ACV(50/60Hz) DC V Auto/Manual range/40V/0.01V/±1.2%rdg±8 dgt/AC/DC 600Vrms
ACV(50/60Hz) DC V Auto/Manual range/400V/0.1V/±1.2%rdg±8 dgt/AC/DC 600Vrms
ACV(50/60Hz) DC V Auto/Manual range/600V/1V/±1.2%rdg±8 dgt/AC/DC 600Vrms
Frequency(Hz) Auto range/100Hz/0.01Hz/±0.5%rdg±3 dgt/AC/DC 600Vrms
Frequency(Hz) Auto range/1000Hz/0.1Hz/±0.5%rdg±3 dgt/AC/DC 600Vrms
Frequency(Hz) Auto range/10kHz/0.001kHz/±0.5%rdg±3 dgt/AC/DC 600Vrms
Frequency(Hz) Auto range/100kHz/0.01kHz/±0.5%rdg±3 dgt/AC/DC 600Vrms
Frequency(Hz) Auto range/1000kHz/0.1kHz/±0.5%rdg±3 dgt/AC/DC 600Vrms
Resistance(Ω) Auto/Manual range/400Ω/0.1Ω/±1.5%rdg±8 dgt/250 Vrms
Resistance(Ω) Auto/Manual range/4kΩ/0.001kΩ/±1.5%rdg±8 dgt/250 Vrms
Resistance(Ω) Auto/Manual range/40kΩ/0.01kΩ/±1.5%rdg±8 dgt/250 Vrms
Resistance(Ω) Auto/Manual range/400kΩ/0.1kΩ/±1.5%rdg±8 dgt/250 Vrms
Resistance(Ω) Auto/Manual range/4000kΩ/1kΩ/±1.5%rdg±8 dgt/250 Vrms
Resistance(Ω) Auto/Manual range/40MΩ/0.01MΩ/±3%rdg±10 dgt/250Vrms
Continuity check/400Ω/0.01Ω/Approx. < 40Ω/250Vrms
Diode test/3V/0.001V/±10%rdg±3 dgt/250Vrms
Crest factor < 3 (0~50% of range)
< 2 (50~100% of range)
Buzzer rumbling The buzzer rumbles when
The power is turned on/turned off
The range switch is changed
The data hold switched on
The measured data is displayed "OL" The continuity check finds that the resistance is below 40 Ω
Jaw opening capability 55mmφ
Over range indication Blanking of all digits except MSD 1
Data hold indication "DH" mark on LCD
Sampling 3 times/sec
Withstanding Voltage AC 5500V 1 minute max. (Between the core of CT and outer case)
Safety standard IEC 61010-1, IEC 61010-2-032
Installation CategoryⅢ600V phase to earth.
E.M.C. standard EN 61326
Operating Temperature 0℃ to 40℃, 80%RH max. ( Without condensation )
Storage Temperature -10℃ to 60℃, 70%RH max. ( Without condensation )
Low battery indication "Battery" mark on LCD
Auto power off Approx. 10 minutes later after power on
Power supply 1.5V (AM-4, LR03 or AAA)×2
Power consumption 36mW
Battery life Approx. 60 hours continuous
Size 85(W)×240(H)×34(D)mm
Weight Approx. 400g
Accessories Hard carrying case:1
Instruction manual:1
Test lead:1set