Atec WT200 User Manual

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Specifications

Input

Input circuit type

Rated inputs (range)

Equipment loss (input resistance)

Instantaneous maximum allowable input for one cycle, 20 ms

Instantaneous maximum allowable input for 1 sec.

Continuous maximum allowable input

Continuous maximum common-mode voltage (at 50/60 Hz input)

Common-mode rejection ratio at 600 Vrms between input terminal and case

Input terminals A/D conversion Range switching Automatic range switching

Measurement mode switching

Notes: Direct input and external sensor input of current cannot be used simultaneously. When the input is switched for use, note that the ± terminals are shared.

Item Voltage V

Resistance voltage divider

15/30/60/150/300/600V

Input resistance: Approx. 2 MΩ, Input capacitance: Approx. 13 pF

Peak voltage of 2.8 kV or rms of 2.0 kV, whichever is less

Peak voltage of 2.0 kV or rms of 1.5 kV, whichever is less

Peak voltage of 1.5 kV or rms of 1.0 kV, whichever is less

600 Vrms (with the output connector protective cover used) CAT II, 400 Vrms (with the output connector protective cover removed) CAT II

With voltage input terminals short and current input terminals open, 50/60 Hz, -80 dB or more (±0.01% of range or less) Reference value: 50 kHz max., ±{(maximum range rating)/(range rating) × 0.001 × 1% of rng} or less (voltage range, 0.5 A to 20 A current range) ±{(maximum range rating)/(range rating) × 0.0002 × 1% of rng} or less (WT200, 5 mA to 200 mA range)

0.01% or more. The unit of "f" is kHz. Binding posts Simultaneous conversion of voltage and current inputs, Resolution: 12 bits, Maximum conversion rate: Approx. 26 µs (at approx. 38 kHz) Range can be selected manually, automatically, or by communication control.

Range up: When the measured value exceeds 110% of the rated range or the peak value exceeds approximately 300% of the rated range Range down: When the measured value becomes less than 30% of the rated range and the peak value is less than approximately 300% of the subordinate range

One of the following modes can be set (manually or by communication control): RMS: True RMS measurements for both voltage and current; V MEAN: Rectified mean calibrated to an RMS sine wave measurement for voltage, and true RMS measurement for current; DC: Mean value measurement for both voltage and current

Floating input

Direct input: 5/10/20/50/100/200 mA (for WT200 only)

0.5/1/2/5/10/20 A (for WT200/WT130) External input (optional): 2.5/5/10 V or 50/100/200 mV

Direct input: Approx. 6 mΩ + approx. 0.1 µH (0.5 to 20 A, WT200/WT130),Approx. 500 mΩ (5 mA to 200 mA, WT200) External input: 2.5/5/10 V - approx. 100 kΩ or 50/100/200 mV - approx. 20 kΩ

0.5 to 20 A (WT200/WT130): Peak current of 450 A or rms of 300 A, whichever is less 5 to 200 mA (WT200): Peak current of 150 A or rms of 100 A, whichever is less

For external input, the peak value is equal to or less than 10 times range.

0.5 to 20 A (WT200/WT130): Peak current of 150 A or rms of 40 A, whichever is less 5 to 200 mA (WT200): Peak current of 30 A or rms of 20 A, whichever is less

For external input, the peak value is equal to or less than 10 times range.

0.5 to 20 A (WT200/WT130): Peak current of 100 A or rms of 25 A, whichever is less (WT200) Peak current of 100 A or rms of 30 A, whichever is less (WT130) 5 to 200 mA (WT200): Peak current of 30 A or rms of 20 A, whichever is less

For external input, the peak value is equal to or less than 5 times range.

Direct input: Large binding posts, External input: Safety terminals

Current A

Shunt input

Measurement Functions

Method Frequency range Crest factor

Display accuracy Accuracy (within 3 months after calibration) Conditions: Temperature: 23 ± 5°C Humidity: 30 to 75% R.H. Supply voltage: 100 V ± 5% Input waveform: Sine wave Common-mode voltage: 0 V DC Filter: ON at 200 Hz or less Scaling: OFF After CAL is performed, accuracy is assured by YOKOGAWA calibration system. Note: The unit of "f" in accuracy

Effect of power factor

Note: The unit of "f" in accuracy

Effective input range Accuracy ( Temperature coefficient Display update rate

Item Voltage/current

DC: 10Hz % f , 45Hz : 45Hz % f % 66Hz : 66Hz , f % 1kHz : 1kHz , f % 10kHz :

10kHz , f % 20kHz

Reference value

20kHz

, f %

50kHz :

expressions is kHz.

within 12 months after calibration

*DC: ±0.2% of range is added if the 0.5/1 A range is selected (WT130 only)

For the input range of 10% to 110%, the above specified accuracy is valid. For the input range of 110% to 130%, the above specified reading accuracy increased by 0.5 times is added to the accuracy.

)

The above specified reading accuracy increased by 0.5 times is added to the accuracy (within 3 months after calibration). ±0.03% of range/°C at 5 to 18°C and 28 to 40°C 4 times/s

± (0.2 % of rdg + 0.2 % of rng) ± (0.3 % of rdg + 0.2 % of rng) ± (0.15 % of rdg + 0.1 % of rng) ± (0.3 % of rdg + 0.2 % of rng) ± (0.2 % of rdg + 0.3 % of rng) ± {(0.05 × )% of rdg} ± (0.5 % of rdg + 0.5 % of rng) ± [{0.15 × (f-10)}% of rdg]

± (0.5 % of rdg + 0.5 % of rng) ± [{0.15 × (f-10)}% of rdg]

Frequency Measurement

Input: One of V1, V2, V3, A1, A2, and A3 is selected. Operating principle: Reciprocal counting method Frequency range: 10 Hz to 50 kHz Accuracy: ±(0.1% of rdg + 1 digit)

Minimum input is more than 30% of rated range. When an input frequency is less than 200 Hz, FILTER must be ON to obtain the speci-

Minimum input frequency is more than 20% of frequency measurement range.

fied accuracy.

Digital sampling method and summation averaging method

DC, 10 Hz to 50 kHz

"3" at rated input

DC: 10Hz % f , 45Hz : 45Hz % f % 66Hz :

66Hz , f % 1kHz : 1kHz , f ^ 10kHz :

10kHz , f % 20kHz :

Reference value

20kHz

, f % 50kHz :

*DC: ±0.2% of range is added if the 0.5/1 A range is selected (WT130 only) cosϕ = 0 45 Hz % f % 66 Hz: Add ±0.25% of range to display accuracy. Reference data (50 kHz max.): ±{(0.23 + 0.4 x f)% of rng} 1 > cosϕ > 0 Add the value of the influence of cosϕ = 0 times tanϕ to display accuracy. Note that ϕ represents the phase angle between voltage and current.

Active power

± (0.3 % of rdg + 0.3 % of rng) ± (0.5 % of rdg + 0.3 % of rng) ± (0.2 % of rdg + 0.1 % of rng)(WT200) ± (0.25 % of rdg + 0.1 % of rng)(WT130) ± (0.5 % of rdg + 0.3 % of rng) ± (0.3 % of rdg + 0.5 % of rng) ± {(0.08 × f)% of rdg} ± (0.8 % of rdg + 0.8 % of rng) ± [{0.19 × (f-10)}% of rdg]

± (0.8 % of rdg + 0.8 % of rng) ± [{0.25 × (f-10)}% of rdg]

Note: "rdg" means reading and "rng" means range.

Communication

Either GP-IB or RS-232-C is selected. GP-IB Electrical and mechanical specifications: IEEE Std. 488-1978 (JIS C 1901-1987) Functional specifications: SH1, AH1, T5, L4, SR1, RL1, PR0, DC1, DT1, C0 Protocol: IEEE Std. 488.2-1987 Code used: ISO (ASCII) code Address: 0 to 30 talker/listener addresses are settable. RS-232-C Transmission mode: Start-stop synchronization Baud rate: 75, 150, 300, 600, 1200, 2400, 4800, 9600 bps

Active power

Apparent power

1-phase 2-wire

1-phase 3-wire

3-phase 3-wire (twopowermeter method)

Σ W =W

(W)

i=1, 3

1+W3

i=1, 3

1+W3

(VA)

VA=V× A

VAi=Vi× A

i=1, 3

Σ VA =VA

+VA

i=Vi

i=1, 3

Σ VA

× A

(VA1+VA3)

3-phase

Computation

3-wire

i=1, 2, 3

(three-

(Note that W

power-

does not have

meter

physical

method)

meaning.)

Σ W =W

3-phase

4-wire

i=1, 2, 3

Σ W

Computing

Depends on

range

selected V and A ranges.

Display resolution

Computing accuracy (relative to the value calculated from measured values)

Note 1:The apparent power (VA), reactive power (var), power factor (PF), and phase angle

(deg) measurements in this instrument are computed digitally from the voltage, current, and active power. If the input is non-sinusoidal, the measured values may differ from those obtained with instruments employing different measurement principles.

Note 2:When the current or voltage is less than 0.5% of the range, VA and var will be dis-

played as 0, and PF/deg will be displayed as an error.

Note 3:The Lead and Lag are displayed for V and A input at 50% or more of the rated range.

The detected lead/lag accuracy is ±5 degrees over the frequency range of 20 Hz to 2 kHz.

Note 4:In a Σvar calculation, the var value of each phase is calculated as a negatively signed

value when the phase of the current input is advanced with respect to the voltage input, and is calculated as a positively signed value when the phase is lagging.

* The WT200 can provide 5-digit display (note that the resolution is 20000).

VAi=Vi× A

i=1, 2, 3

Σ VA

(VA1+VA2 +VA3)

1+W3

VAi=Vi× A

i=1, 2, 3

Σ VA

1+W2

=VA

+VA

Depends on selected V and A ranges.

9999* 9999* 9999*

±0.005% of VA range

—

Reactive

(var)

(VA)2–W

var

= (VAi)2–W

i=1, 3

Σ var

=var

+var

var

= (VAi)2–W

i=1, 3

Σ var =var

var

= (VAi)2–W

i=1, 2, 3

Σ var =var

+var

var

= (VAi)2× W

i=1, 2, 3

Σ var

=var

+var2+var

Same as apparent power (var ^ 0)

±0.005% of var range

+var

i=1, 2, 3

Power factor

(PF)

i=1, 3

Σ PF

Σ W

Σ VA

i=1, 3

Σ PF

Σ W

Σ VA

Σ PF

Σ W

Σ VA

i=1, 2, 3

Σ PF

Σ W

Σ VA

–1 to 0 to 1

± 1.000*

0.0005

Phase angle

(deg)

–1

()

cos

=cos–1()

i=1, 3

Σϕ

Σ W

–1

=cos

()

ΣVA

=cos–1()

i=1, 3

Σϕ

Σ W

–1

=cos

()

ΣVA

=cos–1()

i=1, 2, 3

Σϕ

Σ W

–1

=cos

()

ΣVA

=cos–1()

i=1, 2, 3

Σϕ

Σ W

–1

=cos

()

ΣVA

–180 to 0 to 180

± 180.0

Resolution (power factor ±0.0005)

Display Function

Display type: 7-segment LED Number of displays: 3

Display

V, A, W, VA, var (each element), elapsed integrating time

V, A, W, PF, deg (each element), % (contents ratio in %, THD)

V, A, W, V · AHz, ±Wh, ±Ah (each element), Vpk, Apk, MATH

Displayed value

* In the WT200 either 4 or 5 digits for display can be selected.

Unit: m, k, M, V, A, W, VA, var, Hz, h±, deg, % Display update rate: 4 times/s Response time: Approx. 0.5 s (time for displayed value to settle within specified

Display scaling function

Significant digits: Selected automatically according to significant digits in the voltage

Setting range: 0.001 to 9999 (WT200), 0.001 to 1000 (WT130)

Averaging function:

Either of the following two algorithms can be selected: Exponential averaging Moving averaging Response can be set; for exponential averaging, the attenuation constant can be selected and for moving averaging, the number of averages (N) can be set to 8, 16, 32, or 64.

Peak over-range display

The alarm LED will light up if the rms value is greater than 140% of the range or the peak value is greater than 300% of the range.

MAX hold function (WT200 only)

Capable of storing the maximum values for V, A, W, VA, var, Vpk, and Apk.

accuracy of final value after step change from 0% to 10% or 100% to 0% of rated range)

and current ranges

Maximum Reading

V, A, W: 9999 Wh, Ah: 999999 V, AHz : 9999

MATH function

Method: When the DISPLAY C function is set to MATH, the efficiency

(WT130 only) and input crest factor can be measured, and the results of four arithmetic operations of measured values can be displayed on Displays A and B as well as the average active power after time-conversion of integrating power (WT200 only).

Integrator Function

Display resolution: Depending on integrated value, the resolution will be changed (for

Maximum display: –99999 to 999999 MWh/MAh Modes: Standard integration mode (timer mode)

Timer: When the timer is set, integration will be stopped automatically.

Type: Standard type Adds active power and current value of normal

Count overflow: If the integration count exceeds 999999 MWh/MAh or -999999

Accuracy: ± (display accuracy + 0.2% of rdg) Timer accuracy: ±0.02% Remote control: Start, stop, and reset can be remotely controlled by an external

WT200). Depending on elapsed time value, the resolution will be changed (for WT130).

Continuous integration mode (repeat mode) Manual integration mode

Setting range: 000 h:00 min:00 sec to 10000 h:00 min:00 sec (WT200) Setting range: 000 h:00 min to 999 h:59 min (WT130) (When set time is 0, the manual integration mode is automatically selected.)

measurements. Advanced type (WT200 only) Integrates active power and current values in short time intervals, not depending on input signal period.

MWh/MAh, integration stops and the elapsed time is held on the display.

contact signal. Note that this is available only when the /DA4 or / DA12 option has been installed.

Internal Memory Function

Measurement data Number of data that can be stored: WT200 (253421): 600 blocks

Writing interval: 250 ms, or 1 s to 99 h:59 min:59 sec Reading interval: 250 ms, or 1 s to 1 h (both intervals can be set in

Panel setup information: Four-pattern information can be written/read.

units of second)

WT130 (253502): 300 blocks WT130 (253503): 200 blocks

D/A Converter (Optional)

Output voltage: ±5 V DC FS (approx. ±7.5 V maximum) at rated value or range Number of output channels

Output data selection: Can be selected for each channel. Accuracy: ± (display accuracy + 0.2% of range) Update rate: Same as display update rate Temperature coefficient: ±0.05% of f.s./°C Output format

Frequency

Integration

Other items

: 12 when the /DA12 option is installed; 4 when the /DA4 option is

installed

D/A output

7.5V

5.0V

2.5V

0.5V

D/A output

7.0V

5.0V

Displayed value

140%

100%

0% –100% –140%

For PF and deg, a value between ±5 and ±7 V will not be output. If an error occurs, the output will be approx. 7.5 V.

10Hz 100Hz 1kHz 10kHz

140% input of the rated value

t0: Rated value setting time

Output

7.0V

5.0V 0V

–5.0V –7.0V

–100%–140%

Rated value input

D/A output

7.5V

7.0V

5.0V

–5.0V –7.0V

–7.5V

Displayed value50kHz

t0 Integration time

Displayed value

140%100%

External Input (Optional)

Either /EX1 or /EX2 can be selected as a voltage-output-type current sensor. /EX1: 2.5/5/10 V /EX2: 50/100/200 mV Specifications: See the “Input” item.

Comparator Output (Optional)

Output method: Normally open and normally closed relay contact outputs (in pairs) Number of output channels and channel setup: 4 (settable for each channel) Contact capacity: 24 V/0.5 A D/A output (4 channels): See the “D/A Converter (Optional)” item.

External Control and Input Signals (only when the D/A or /CMP option has been installed)

External control and input/output signals:

Input level: TTL negative pulse

EXT-HOLD, EXT-TRIG, EXT-START, EXT-STOP, EXT-RESET, INTEG-BUSY Note:That the /DA4 or /DA12 option must be installed. Note:Only EXT-HOLD and EXT-TRIG are available when the / CMP

option has been installed.

General Specifications

EMI standard: EN55011 Group 1 Class A

Safety standards: EN61010-1

Warm-up time: Approx. 30 min. Operating temperature and humidity range: 5 to 40°C, 20 to 80% R.H. (no condensation) Storage temperature: –25 to 60°C (no condensation) Operating altitude: 2000 m or less Insulation resistance: Between voltage input terminals and case

Withstanding voltage: Between voltage input terminals and case

Power supply: Any power supply voltage between 100 and 240 V; frequency: 50/

Vibration test conditions: Sweep test - Frequency: 8 to 150 Hz sweep, all three directions

Impact conditions: Impact test: Acceleration of 490 m/s

Power consumption:

External dimensions: WT200:Approx. W × H × D: 213 × 88 × 350 (mm) (not including

Weight: WT200:Approx. 3.0 (kg), 6.6 (lbs.)

Accessories: Power cord: UL/CSA, VDE, SAA or BS standard, 1 pc.

EN50082-2: 1995

Overvoltage Category II Pollution degree 2

Between current input terminals and output terminals Between voltage input terminals and current input terminals Between voltage input terminals of each element Between current input terminals of each element Between voltage input terminals and power plug Between current input terminals and power plug Between case and power plug The above values must be 50 MΩ or more at 500 V DC.

Between current input terminals and output terminals Between voltage input terminals and current input terminals Between voltage input terminals of each element Between current input terminals of each element Between voltage input terminals and power plug Between current input terminals and power plug The above values must be 3700 V for 1 minute at 50/60 Hz. Between case and power plug: 1500 V for 1 minute at 50/60 Hz

60 Hz

Endurance test - Frequency: 16.7 Hz, all three directions; ampli-

Free-fall test - Height:100 mm, 1 time for each of four sides WT200: 35 VA max., WT130: 50 VA max. (for power supply of 240 V) WT200:25 VA max., WT130: 32 VA max. (for power supply of 100

projections) 8-3/8 × 3-1/2 × 13-3/4 (inch) (not including projections)

WT130:Approx. W × H × D: 213 × 132 × 350 (mm) (not including

projections) 8-3/8 × 5-3/16 × 13-3/4 (inch) (not including projections)

WT130:Approx. 5.0 (kg), 11.0 (lbs.)

for 1 minute

tude of 4 mm for 2 hr

, all three directions

Harmonic Analysis Function (Optional)

Method: Synchronization to the fundamental frequency by using a phase

Frequency range: Fundamental frequency between 40 Hz and 440 Hz Display resolution: 9999 (WT130), 9999 or 20000 (WT200) Items analyzed: V, A, W, deg (WT200); V1, V2, V3, A1, A2, A3, W1, W2, W3, deg1,

Note that simultaneous analysis can be made for one specified input mode. Sampling speed/method: The sampling speed depends on the fundamental frequency to be input:

FFT number of points: 512 points FFT FFT calculation accuracy:32 bits Window: Rectangular window Display update interval: Approx. 3 sec. Accuracy: ±0.2% of range is added to the normal display accuracy.

■ Model and Suffix Codes

Suffix Code

Model Description

253421

-D

Power cord

-F

-R

-Q

Optional features

/EX2 /HRM /DA4 /CMP

Note: The WT200 communication feature cannot be modified or provided later after

delivery of the product.

Model Description

253502 253503

-C1

Interface

-C2

-0

Supply voltage

-D

Power cord

-F

-R

-J /EX1

Optional features

/EX2 /HRM /DA12 /CMP

■ Wiring and Model

Wiring Single-phase, 2-wire

Single-phase, 3-wire Three-phase, 3-wire (2-power-meter method)

■ External Dimension

250 213

Unit: mm

356

Three-phase, 3-wire (3-power-meter method) Three-phase, 4-wire

■ Accessories

132

8819

356

179

213

Name Rack-mount kit Rack-mount kit Rack-mount kit Rack-mount kit Rack-mount kit Rack-mount kit Rack-mount kit Rack-mount kit

locked loop (PLL) circuit

deg2, deg3 (WT130), each harmonic component, total Vrms, total Arms, total active power, PF of the fundamental wave, phase-angle of fundamental wave, total harmonic distortion ratio in %, and contents ratio in %

Input

frequency

range

40% f<70Hz 70% f<130Hz 130% f<250Hz 250% f% 440Hz

Sampling frequency

f×512Hz f×256Hz f×128Hz f×64Hz

up to the n'th

1 period of f 2 period of f 4 period of f 8 period of f

WT200, 1-input element model UL/CSA standard VDE standard SAA standard

BS standard

/C1 /C2 /EX1

GP-IB communication function

RS-232-C communication function

External input 2.5/5/10 V

External input 50/100/200 mV

Harmonic analysis function

4-channel D/A output

Comparator & D/A, each of 4 channels

Suffix Code

WT130, 2-input element model WT130, 3-input element model GP-IB communication function RS-232-C communication function Any power supply voltage between 100 and 240 V UL/CSA standard VDE standard SAA standard BS standard External input 2.5/5/10 V External input 50/100/200 mV Harmonic analysis function 12-channel D/A output Comparator & D/A, each of 4 channels

Model

253421

253502

Model or Part Number

751533-E2

751533-J2

751534-E2

751534-J2

751533-E3

751533-J3

751534-E3

751534-J3

Specifications Single-mounted WT200 for EIA Single-mounted WT200 for JIS

Dual-mounted WT200 for EIA

Dual-mounted WT200 for JIS Single-mounted WT130 for EIA Single-mounted WT130 for JIS

Dual-mounted WT130 for EIA

Dual-mounted WT130 for JIS

Window

harmonic

Order

50 50 50 30

Select one.

253503

Order Quantity

1 1 1 1 1 1 1 1

Atec WT200 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual