YOKOGAWA CW140, Руководство пользователя, Страница: 11 / 292

1-1
IM CW140-E
Product Overview
1
Chapter 1. Product Overview
1.1 Product Overview
The CW140 clamp-on power meter is basically designed for measuring root-
mean-square voltage and current rms values and thereby electric energy. With its
computing capabilities, the CW140 can measure and analyze a wide variety of
parameters related to electric power.
This section explains the features of the CW140 and shows a schematic diagram
representing the functions of the CW140. It also explains the screen views (i.e.,
measuring objects) presented by each measurement mode of the CW140.
Features
●
Supports a variety of measurement modes and continuous
measurement.
The CW140 has four measurement modes which support continuous
measurement.
• Instant Measure mode (logging)
• Electric Energy Measure mode (integration)
• Demand Measure mode (demand measurement)
• Harmonics Measure mode (logging)
●
Efficient Measurement using the Wh Key
This feature simplifies operations required for the Electric Energy Measure mode
most often used.
●
Supports a variety of wiring methods.
• Supports single-phase two-wire systems, single-phase three-wire systems,
three-phase three-wire two-current systems, three-phase three-wire three-
current systems, and three-phase four-wire systems.
• Supports dual-load systems in a single-phase two-wire, single-phase three-
wire, or three-phase three-wire configuration (except when in the Harmonics
Measure mode).
●
Data Management
• Measured values or measurement settings can be stored in internal memory
or on a 3.5-inch floppy disk inserted in an optional floppy drive attached
externally to the CW140.
• Allows simultaneous data saving to internal memory and a floppy disk, or
copying internal memory data to a floppy disk.
• An optional printer connected externally to the CW140 allows you to print
measured values or measurement settings.
●
Communication
With an RS-232-C interface, it is possible to transfer data to or receive
measurement settings from a personal computer. The CW140 stores
measurement data in CSV format, facilitating data processing (such as creating
graphs) using commercial spreadsheet software.
●
Setting Operations
• Easy-to-operate Display Screen
You can easily change settings by selecting items highlighted on the screen using
Range keys, Cursor key, and function keys.
●
Settings Check Sheet
The settings check sheet in Appendix 6 lists required setting items for each
measurement mode. Use this sheet for reference and to improve efficiency when
making settings in the field.