CW120 and CW121, Precision Power Clamp-on Meters
Maintenance and long term monitoring of electrical equipment and electrical systems
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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- Compact & Light weight 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)
- 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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Periodically save data as often as once a secondData 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 conditionsThe CW120 Series has an instantaneous value filing function (enabling multiple data records to be saved in a single file when multiple measurements are taken) which is useful for determining equipment operating conditions
Works even with small electric energyvaluesEasily change the decimal position (the number of digits following the decimal point) and display unit (Wh,kWh, MWh, GWh) on the electric energy display
Load measurements on multiple systemsIn 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): 1Ø2W X2
CW121 (three-phase 4-wire model): 1Ø2WX2, X3
The Yokogawa CW120/CW121 power meter is a Low-cost tool designed to support your energy conservation efforts. The CW120/CW121 monitors data and saves it in 1-second intervals. This capability allows the CW120 Series to respond quickly to load fluctuations and measure transient responses in equipment. An instantaneous value filing function (enables multiple data records to be saved in a single file when multiple measurements are taken). This function helps ensure that measurements are correct, ideal for determining equipment operating conditions.In addition to supporting a wide variety of connection types, The CW120 Series can simultaneously measure the loads (facilities, equipment) on multiple systems sharing a common power supply.
Not only can the CW120/CW121 simultaneous measure multiple facilities, multiple units can start and stop integration simultaneously through externally controlled I/O. The CW120/CW121 power meter works with small electric energy values. The decimal position (number of digits following the decimal point) and the display unit (Wh, kwh,MWh, GWh) are featured on the electric energy display.
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. 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. The data file stored in CF pack can be transfered to PC. Microsoft Excel can read transferred data file.
In addition to proprietary communication the CW120/CW121 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. The RS-485 allows multiple use to be connected for remote monitoring.
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