For all your test equipment requirements

Yokogawa CW120 Clamp-on Power Quality Meter

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  • Compact & Light weight body with large back-lit LCD
  • Current clamps in a range of sizes (small to large diameter)
  • Measures up to 495V
  • 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
  • Accuracy: 1.2%(0.8% rdg + 0.4% range)
  • Special Option /SP1 is for CW121 Only

As energy conservation becomes increasingly important, we are pleased to present low-cost clamp-on power meters designed to meet user needs for simple tools capable of measuring power values and instantaneous values.

 

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Wiring Method:

CW120: Single-phase 2-wire, Single-phase 3-wire, 3-phase 3-wire, Single-phase 2-wire 2-load system

CW121: 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.

Yokogawa CW120 Clamp-on Power Quality Meter

  • Special Option /SP1 is for CW121 Only
  • Compact & Light weight body with large back-lit LCD
  • Current clamps in a range of sizes (small to large diameter)
  • Measures up to 495V
  • 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
  • Accuracy: 1.2%(0.8% rdg + 0.4% rng)
As energy conservation becomes increasingly important, we are pleased to present low-cost clamp-on power meters designed to meet user needs for simple tools capable of measuring power values and instantaneous values.

Useful features for energy conservation and power measurement

  • Periodically save data as often as once a second
    Data can be saved as low as 1-second interval. This capability allows the CW120 Series to respond quickly to load fluctuations and measure transient responses in equipment.
  • Check equipment operating conditions
    The CW120 Series has an instantaneous value filing function (enabling multiple data records to be saved ina single file when multiple measurements are taken) which is useful for determining equipment operating conditions.
  • Wiring error check function
    This function helps ensure that measurement operations are correct.
  • Simultaneous measurement of multiple facilities
    Multiple CW120 Series units can start and stop integration simultaneously through externally controlled I/O.
  • Works even with small electric energy values
    Easily change the decimal position (the number of digits following the decimal point) and display unit (Wh,kWh, MWh, GWh) on the electric energy display.
Details for the CW120 and CW121:
Items CW-120/CW-121
Measurement Mode Input System Instant Mode Single-Phase 2-wire to 3-phase 4-wire (Up to 3 phase 3 wire for CW120)
Electric Energy Mode Available
Display Screen Segmented LCD with Backlight
Communication Interface RS232 or RS485
Protocol MODBUS, PC-link, Power Monitor, Proprietary
Monitoring by AP240E Available
Power Supply 100 to 240V AC, Supply the power from input
Size 117x161x51mm
Weight 600g
Example of the 1ø2W Three Current Systems on the CW120/CW121Load Measurements on Multiple Systems:
In addition to support for a variety of connection types, The CW120 Series can simultaneously measure the loads (facilities, equipment) on multiple systems sharing a common power supply.

  • CW120 (three-phase 3-wire model): 1ø2Wx2
  • CW121 (three-phase 4-wire model): 1ø2Wx2, x3
Toolbox24:
The setting 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.

  • Measurement conditions setting function
    • This function makes it easy to set basic functions needed for measurement, such as start/stop time and date, wiring method, clamp type, voltage, and current range etc.
  • File transfer function
    • The data file stored in CF pack can be transferred to PC. Microsoft Excel can read transferred data file.* Toolbox is included as a standard feature (on two floppy disks).
  • Data Management/Communication
    • You can connect CW120 to a PC through a RS-232 Communication Cable (91011)
    • With the RS-232 Printer Cable (91010), you can print measurement data with the specialized printer (97010)
    • If you have a media reader connected to your PC or card slot in notebook PC, measurement data and settings cane uploaded directly to a PC from a Compact Flash Card.
  • MODBUS
    • CW120 In addition to proprietary communication also supports, MODBUS, PC-link and Power Monitor protocols. PC-link is a protocol for Yokogawa’s Temperature controllers and PLCs. Power Monitor protocol is a protocol for Yokogawa’s Power Monitors. (PR201)
  • Remote Monitoring
    • The RS-485 allows multiple use to be connected for remote monitoring.

 

 

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