Multi Measuring Instruments Co.,Ltd. Japanese Chinese
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Digital harmonics tester

Digital Harmonics Clamp Tester

PRODUCTS
AC Leakage Current, 400mA/4A/40A/300A
True rms reading, 40mmφCT
Harmonics Current and Voltage
Model HWT-301 (CE)
Digital Harmonics Clamp Tester. Model HWT-301 (CE)
FEATURES
  • Harmonics and leakage current measurements.
  • Up to 25th harmonics current and voltage measurements.
  • True rms reading for ACA and ACV.
  • Data-hold and Auto power off function.
  • Conform to IEC safety requirements.
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DETAIL
SPEC
SPECIFICATIONS
Safety standard : IEC 61010-1, IEC 61010-2-032, Installation
CategoryⅡ600V or CategoryⅢ300V
E.M.C. standard : EN 61326
Measuring method : Dual slope integration mode
AC conversion : True rms responding
Display : 3.5 digit LCD, max. reading of 3999
Input frequency : 45Hz~65Hz
Affection of magnetic field : 3mA or less (at 100A nearby conductor)
Jaw opening capability : 40mmφ
Over range indication : "OL" mark on LCD
Low battery indication : "Battery" mark on LCD
Data hold indication : "DH" mark on LCD
Sampling : 2 times/sec
Withstanding voltage : AC 3700V 1 minute max. (Between the core of CT and outer case)
Operating temperature : 0℃ to 40℃, 80%RH max. ( Without condensation )
Storage temperature : 10℃ to 60℃, 70%RH max. ( Without condensation )
Power supply : 1.5V (AM-4, LR03 or AAA)×3
Power consumption : 13mA
Auto power off : Approx.20 minutes later after power on
Battery life : Approx.50 hours continuous
Size : 70(W)×223(H)×34(D)mm
Weight : Approx. 440g
Accessories :
Hard carrying case : 1
Instruction manual : 1
Batteries : 3
Crest factor : < 3 (0~50% of range)
< 2 (50~100% of range)
Accuracy : (23℃±5℃, 80%RH or less)
Range Resolution Accuracy Max.input
AC 400mA 0.1mA ±1.0% rdg ± 8 dgt AC 300Arms
AC 4A 1mA
AC 40A 10mA
AC 300A 100mA ±1.0% rdg±1% of full scale
AC 400mV 0.1mV ±1.0% rdg ± 8 dgt AC 250Vrms
AC 400V 100mV AC 450Vrms
4000Ω ±1.0% rdg ± 8 dgt AC 400Vrms
Harmonics mode
Measuring method : Synchronous filter
Measurable harmonics : Fundamental to 25th harmonics
Minimum input : More than 5% of full scale in each range
Harmonics Accuracy(In case of more than 4% harmonics is included
against fundamental input)
1~9th (±1%rdg±5 dgt)±(basic accuracy of ACA or ACV)-(Error by neighboring harmonics)
10~19th (±2%rdg±5 dgt)±(basic accuracy of ACA or ACV)-(Error by neighboring harmonics)
20~25th (±5%rdg±5 dgt)±(basic accuracy of ACA or ACV)-(Error by neighboring harmonics)