MEWOI7900 Rogowski Coil Current Clamp/Flexible Coil clamp meter

MEWOI OEM/ODM Testing Instruments Manufacturer

  • Main Features:: 1,AC current detection 2, Range: AC 10mA~9999A 3,clamp size:φ200mm,4,Diameter:φ7.5mm
  • Model No.:: MEWOI7900
  • Name:: MEWOI7900 Rogowski Coil Current Clamp/Flexible Coil clamp meter


Click to download: MEWOI7900 User Manual

Click to download:  MEWOI7900 Color Page

The MEWOI7900 Rogowski current clamp is designed for the test of big current and leakage current. It is widely used in the fields of electric power, communication, meteorology, railway, oil field, construction, measurement, scientific research and teaching units, industrial and mining enterprises and so on. The cable is especially suitable for intensive places, the current industrial environment such as the wall- subway transformer core current test, thick wire cable test, relay protection, silicon controlled rectifier, inverter, semiconductor switch, power electronic conversion equipment, arc welding and other serious distortion of the signal of the test.

Flexible current clamp, namely Rogowski Coil (Rockwell coil), is a circular coil uniformly wound on non-ferromagnetic materials, no hysteresis effect, almost zero phase error, no magnetic saturation, high linearity, strong anti-interference ability. The output signal is the differential of current to time. By integrating the output voltage signal, the input current can be truly restored, and the current range can be from mA to 10000A. Flexible coil current clamp part without any bare metal conductor, non-contact measurement, safe and fast; the small size and light weight, beautiful appearance, soft and flexible, suitable for narrow environment and cable intensive sites; high accuracy, strong reliability, frequency bandwidth, users can be customized according to the length of the coil.

The instrument also has the functions of peak retention, data retention, data storage and so on. It is a necessary tool for electrical safety inspection.


FunctionBig AC current, leakage current measurement
PowerZn-Mn dry battery,6F22,9V
Test ModeFlexible CT: the output signal is the differential of the current to the time. By integrating the output voltage signal, the input current can be restored.
Coil Diameterφ200mm
RangeAC 0.00A ~ 9999A
ResolutionAC 10mA
Accuracy2% + 3dgt (the tested wire is in the central position of the flexible coil, 23℃±2℃)
Coil length 628mm
Coil thicknessCoils of thickness (7.5mm) (very suitable for a narrow environment and a dense line of rows, etc.)
Frequency50Hz/60Hz (automatic recognition)
Display ModeFour digits LCD display

Width × Height× Thickness:190mm×370mm×40mm

LCD Dimension35mm×21.5mm;display domain:32mm×15mm
Electric field interferencehas no hysteresis effect and strong anti-interference ability
Position ErrorThe position error of the measured wire should be at the center of the flexible coil as far as possible, not close to the opening port, and the test error at the opening port is about twice or more.
Sampling Rate2times/sec
Data Memory99sets, display "FULL" symbol indicates that the storage is full
Peak HoldPush HOLD without release, shows the peak value symbol MEWOI-clamp meter|earth ground resistance tester|pinza|接地电阻|curent sensor probe|电流传感器
Reading HoldDHindicating the reading is hold
Voltage RangeAC600V
Out of RangeOL indicating the current is out of range
Battery VoltageIndicating the battery voltage is lower then 7.2V.Then the battery have to be changed
Rated CurrentAbout 8mA
Temperature and Humidity

Working: 0℃~40℃,below 80%rh, Storage: -10℃~60℃,below 70%rh

Insulation resistance100M Omega or larger, 1000V
Applicable Safety RulesIEC1010-1、IEC1010-2-032、pollution grade 2、CAT VI (1000V) IEC61326 (EMC standard)


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