• Compact & lightweight body with large back-lit LCD
  • Current clamps in a range of sizes(small to large diameter)
  • Support for large-capacity ATA flash memory (equipped with PC card slot)
  • Data can be saved at from 1 second
  • Wiring error check function
  • 2 or 3-load system
  • Simultaneous measurement of multiple use possible by external control terminal
  • Parameters setting tool is included to set measurement conditions through PC

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General Description Input System: Single-phase 2-wire to 3-phase. 3-wire (CW120) or 4-wire (CW121)
Features: Large capacity of memory (ATA flash memory card), Wiring error check function, 2 or 3-load system, Support variety of network communication protocols
Measuring Function V/A / Active power / Reactive power / Power factor (lead/leg) / Frequency / Active electric energy / Regenrative electric energy (Only for data saving)


Input Voltage 150/300/450V Range(CAT III 600V) Max:450V+10%
Current 5/10/20/50/100/200/500/1000A Range
Wiring Method CW120: Single-phase 2-wire, Single-phase 3-wire, 3-phase 3-wire,Single-phase 2-wire 2-load systemCW121: Single-phase 2-wire, Single-phase 3-wire, 3-phase 3-wire, 3-phase 4-wire,Single-phase 2-wire 2 or 3-load system
Accuracy 1.2%(0.8% rdg + 0.4% rng)(Depend on Clamp probe to use)
Name Description File Type  
Clamp-On Power Meters Bulletin   pdf icon
1.57 MB
Clamp-On Power Meters Communication Functions   pdf icon
323 KB
CW121 Apps Notes   pdf icon
508 KB
CW121 Apps Notes Spanish   pdf icon
972 KB
CW120/121 User's Manual pdf icon
2.69 MB
CW120/121 Operation Guide pdf icon
318 KB
Name Description  
EasyChart EasyChart can easily plot Charts and Lists from data files recorded on CW Series
Electric Energy Measure mode using the functions of Microsoft Excel.
TOOLBOX This software allows you to set CW120 Series measurement conditions through a PC and save measurement data on a PC when the unit is connected to the PC through RS-232 or RS-485 port. y-Link

T&M Overview 2015
T&M Overview 2015
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