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Yokogawa CW121-F-1/PB1 Clamp On Power Meter. Power Cord: VDE Standard. Interface RS232

Yokogawa CW121-F-1/PB1
         
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Clamp On Power Meter. Power Cord: VDE Standard. Interface RS232. Case for main unit, Carrying case, CF Pack,.

Features

  • CW121-F-1/PB1 Clamp On Power Meter. Power Cord: VDE Standard. Interface RS232. Case for main unit, Carrying case, CF Pack,.
  • Periodically save data as often as once a second
  • Check equipment operating conditions
  • Wiring error check function
  • Simultaneous measurement of multiple facilities
  • Works even with small electric energy values
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Product Information

Yokogawa CW121-F-1/PB1 Clamp On Power Meter. Power Cord: VDE Standard. Interface RS232. Case for main unit, Carrying case, CF Pack,.

Low-cost tools to support your energy conservation efforts

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 CW121 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.
  • 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 Models CW120/CW121
 
Items CW120/CW121
Measurement Mode Input system Single-phase 2-wire to 3-phase 4-wire
Instant mode (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 (WxHxD) 117x161x51mm
Weight 600g

Load 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
1ø2W Three current systems (example)
threecounters

Compact design

  • The CW120 Series is compact in size (117x161x51mm (WxHxD)), making it ideal for installation in cubicles and inside distribution panels. Installation is even easier with the magnetic case (93023).
  • Although the CW120 Series is small, it has a large backlit LCD.
  • A new addition to the clamp lineup is a small-diameter current clamp (model 96033, capable of measurements in the range of 5–50 A) for measurements in tight spots and locations where many wires are jumbled together.
Compact-design

Measurements

  • The CW120 Series can be used for voltage measurements up to 495 V.
  • A variety of connection types are supported, from single-phase 2-wire to three-phase 4-wire (CW120: three-phase 3-wire model; CW121: three-phase 4-wire model).
  • Continuous measurement integration (accurate measurements can be obtained even if there are large load fluctuations)
  • Plus/minus signs are shown for reactive power and power factor.
  • The data saving interval can be set in the range of one second to one hour.

Parameters setting tool (name: Toolbox)

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 transfered to PC. Microsoft Excel can read transferred data file. * Toolbox is included as a standard feature (on two floppy disks).
 
filetransfer
parameters

Data management and communication

  1. You can connect CW120 to a PC through dedicated RS-232 cable.
  2. A printer (sold separately) can be connected through RS-232 cable to print measurement data.
  3. If you have a media reader connected to your PC or card slot in notebook PC, measurement data and settings can be uploaded directly to a PC from CF* pack.
Memory Card Memory capacity Interval Time 10sec Interval Time 1sec Wiring Method
97034 256MB Approx. 103days Approx. 70hours 3system 1ø2W
97035 512MB Approx. 206days Approx. 140hours 3system 1ø2W
97037 2GB Approx. 2years Approx. 560hours 3system 1ø2W
* Compact Flash cards with memory capacity up to 2 GB may be used.
Data-management

Network Communication

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)


* DAQLOGGER is Yokogawa’s communication software for Windows
Data Management by DAQLOGGER*
DAQLOGGER

Remote monitoring

The RS-485 allows multiple use to be connected for remote monitoring.

* RS-485/RS-232 converter is required to connect the CW120/CW121-m-2 (RS-485 communication spec) to the RS-232 port on your PC.

Recommended brand and model: Yokogawa’s RS-232/RS-485 Converter Model  ML2.
Remote-monitoring

Specifications

Inputs
Parameter Voltage (V) Current (A)
Input type Resistive potential division Clamp detection
Rated value
(range)
150/300/450 V Clamp 96033: 5/10/20/50 A
Clamp 96030: 20/50/100/200 A
Clamp 96031: 50/100/200/500 A
Clamp 96032: 200/500/1000 A
Wiring CW120 Single-phase 2-wire, single-phase 3-wire, three-phase 3-wire
CW121 Single-phase 2-wire, single-phase 3-wire, three-phase 3-wire, three-phase 4-wire
Input
resistance
CW120 Approximately 1.5 MΩ Approximately 100 kΩ
CW121 Approximately 1.3 MΩ
Maximum allowed
input
495 Vrms Clamp 96033: 130 Arms
Clamp 96030: 250 Arms
Clamp 96031: 625 Arms
Clamp 96032: 1000 Arms
A/D converter Voltage/current input simultaneous conversion, 12-bit resolution
Measurement Input functions
Parameter Voltage Current/active power
Method Digital sampling
Frequency range 45–65 Hz (reciprocal system), detected from V1
Crest factor 150/300 V range Rated input: 2 Rated input: 3
450 V range Rated input: 1.56
Active input range 10–110% of each range
Display
range
Lower limit All ranges 1.5 V 0.4% of each range
Upper limit 130% of each range, except 110% for 450 V range 130% of each range
Temperature coefficient ±0.05% rng/˚C ±0.07% rng/˚C (including clamp)
Display updating interval Approximately one second
Instantaneous Value Measurement
Measurement parameters Voltage rms (V), current rms (A), active power (W), frequency
(Hz)
Measurement accuracy (at power factor 1, including clamp)
Voltage
Current/active power

±(0.3% rdg + 0.2% rng)
±(0.8% rdg + 0.4% rng) when using clamps 96030, 96031, and
96033
±(1.2% rdg + 0.8% rng) when using clamp 96032
Frequency ±(0.1% rdg + 1% dgt)
Computation parameters Reactive power (Var), power factor
Computation accuracy (value calculated from measurement) ±1 dgt
Power factor influence ±1.0% rng cosø = ±0.5 (relative to power factor 1) when using
clamp 96030
±2.0% rng cosø = ±0.5 (relative to power factor 1) when using
clamps 96031, 96032, and 96033
Reactive factor influence ±1.0% rng sinø = ±0.5 (relative to reactive factor 1) when using
clamp 96030
±2.0% rng sinø = ±0.5 (relative to reactive factor 1) when using
clamps 96031, 96032, and 9603
Electric Energy Measurement
Measured parameters Active electric energy, regenerative electric energy (regenerative electric energy is not displayed
on the screen; it is merely saved)
Measurement accuracy Active power measurement accuracy ±1 dgt (with standard settings)
Integration function settings Start/stop settings: Manual, timer, external trigger (control)
Output intervals: 1/2/5/10/15/30 seconds; 1/2/5/10/15/30 minutes; 1 hour
Displayed digits This is set automatically based on the rated power, and the minimum resolution can be set
Saving items
Saving items Voltage, current, active power, reactive power, power factor, frequency, active electric energy,
regenerative electric energy
Display Functions
Display screen Backlit segmented LCD
Maximum number of displayed digits
Electric energy
Other parameters

6 digits
4 digits
Range makeup (rated values)
Communication Functions
Electrical specifications Conforms to EIA RS-232 or EIA RS-485.
Protocols CW120/121 proprietary protocol, Power Monitor protocol
(Standard protocol used for YOKOGAWA M&C's Power
Monitor)
PC link communication (Standard protocol used for
YOKOGAWA M&C’s Temperature Controllers)
MODBUS communication (ASCII or RTU)
Synchronization system Start stop synchronization
Baud rates 1200, 2400, 4800, 9600, 19200, 38400 bps
PC card interface
Slot PC card slot TYPE II
Compatible card: ATA flash memory card
Function specifications Saving measurement data, saving and reading settings data
Faulty Wiring Checking Functions
Check details Presence/absence of power input; check for frequency measurement range; voltage phase
sequence;
presence/absence of power input; whether current clamp is reverse-connected
Scaling Function
The VT ratio and CT ratio can be set.
Settings ranges

VT ratio: 1–10,000
CT ratio: 1–10,000 (in increments of 0.01)
External Control I/O (for RS-232 only; not provided for RS-485)
These input and output can be used as signals for starting and stopping integrating measurement.
Control input TTL level or contact
Control output TTL level
Other Functions
Clock (typical precision: ±100 ppm), key lock, system reset
General Specifications
Environmental requirements: Indoor usage at an altitude of 2000 meters or less.
Usage temperature and humidity ranges 0–50°C, 5–85% RH (no condensation)
0–40°C, 5–85% RH (no condensation) for UL, C-UL
Insulating resistance 500 V DC, 50 MW or greater
Between voltage input terminals and case
Between voltage input terminals and current input terminals, communication terminals, and control
I/O terminals
Between power line and case
Between power line and current input terminals, communication terminals, and control I/O
terminals
Insulating withstand voltage 5550 V AC for one minute
Between voltage input terminals and case
3320 V AC for one minute
Between voltage input terminals and current input terminals, communication terminals, and
control I/O terminals
2300 V AC for one minute
Between power line and case
Between power line and current input terminals, communication terminals, and control I/O
terminals
Power supply 100–240 V AC ±10%, 50/60 Hz
Consumed power 8 VA maximum
External magnetic field effects Within accuracy levels at 400 A/m
External dimensions Approximately 117 x 161 x 51 mm (W x H x D)
Weight Approximately 0.6 kg
Connectors
RS-232 Mini DIN 8-pin
AC power supply 2-pin
Accessories
Voltage input probes 3 for CW120, 4 for CW121
Power cord, user's manual, operation guide, Toolbox (setting software)

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