Atec Yokogawa-WT500 User Manual download pdf

WT500 SPECIFICATION

WT500 Specifications

Inputs

Specification

Voltage

Plug-in terminal (safety terminal)

Current

• Direct input: Large binding post

• External sensor input: Insulated BNC connector

Voltage

Floating input, resistive potential method

Current

Floating input, shunt input method

Voltage

15 V, 30 V, 60 V, 100 V, 150 V, 300 V, 600 V, 1000 V (for crest factor 3)

7.5 V, 15 V, 30 V, 50 V, 75 V, 150 V, 300 V, 500 V (for crest factor 6)

Current

• Direct input

500 mA, 1 A, 2 A, 5 A, 10 A, 20 A, 40 A (for crest factor 3)

250 mA, 500 mA, 1 A, 2.5 A, 5 A, 10 A, 20 A (for crest factor 6)

• External sensor input

50 mV, 100 mV, 200 mV, 500 mV, 1 V, 2 V, 5 V, 10 V (for crest factor 3)

25 mV, 50 mV, 100 mV, 250 mV, 500 mV, 1 V, 2.5 V, 5 V (for crest

factor 6)

Voltage

Approximately 2 MΩ, 13 pF

Current

• Direct input: Approximately 5 mΩ + approximately 0.1 µH

• External sensor input: Approximately 100 kΩ

Voltage

Peak voltage of 2.8 kV or RMS of 2 kV, whichever is lower

Current

• Direct input: Peak current of 450 A or RMS of 300 A, whichever is lower

• External sensor input: Peak not to exceeded 10 times the range

Voltage

Peak voltage of 2 kV or RMS of 1.5 kV, whichever is lower

Current

• Direct input: Peak current of 150 A or RMS of 45 A, whichever is lower

• External sensor input: Peak not to exceed 10 times the range

Voltage

Peak voltage of 1.5 kV or RMS of 1 kV, whichever is lower

Current

• Direct input: Peak current of 100 A or RMS of 45 A, whichever is lower

• External sensor input: Peak not to exceed 5 times the range

1000 Vrms

Apply 1000 Vrms with the voltage input terminals shorted and the

current input terminals open.

• 50/60 Hz: ±0.01% of range or less

• Reference value up to 100 kHz

± (max. range/range)* 0.001 * f% of range or less.

However, 0.01% or more. The units of f are kHz. Current Sensor Input

is 10 times of above equations. The maximum

rated range within equations is 1000 V or 40 A or 10V.

Select OFF, 500 Hz, 5.5 kHz.

Select OFF, or ON (Cut off frequency: 500 Hz)

Simultaneous voltage and current conversion and 16-bit resolution.

Conversion speed (sampling rate): Approximately 10 µs. See

harmonic measurement items for harmonic display.

Can be set for each input element.

Increasing range value

• When the measured values of U rms and I rms exceed 110% of the

range rating

• When the peak value exceeds approximately 330% of the range

rating (or approximately 660% for crest factor 6)

Decreasing range value

• When the measured values of U rms and I rms fall to 30% or less of

the range rating, and Upk and Ipk are 300% or less of the lower range

value (or 600% for crest factor 6)

Calculation Functions

Equations

Power integration

N: sampling times during the elapsed period

Time: unit is h

WPTYPE: CHARGE/DISCHARGE

WP+ is summation of product of u (n)  i(n) equation which is only positive value

WP- is summation of product of u (n)  i (n) equation which is only negative value

WP is sum of WP+ and WP-

WPTYPE: BOUGHT/SOLD

WP+ is summation of average P which is only positive value

WP- is summation of average P which is only negative value

WP is sum of WP+ and WP-

Note1) The instrument’s apparent power (S), reactive power (Q), power factor (l), and phase angle (Ø) are

calculated using measured values of voltage, current, and active power. (However, reactive power is calculated

directly from sampled data when TYPE3 is selected.) Therefore, when distorted waveforms are input, these

values may be different from those of other measuring instruments based on different measuring principals.

Note 2) The value of Q in the QS calculation is calculated with a preceding minus sign (-) when the current input

leads the voltage input, and a plus sign when it lags the voltage input, so the value of QS may be negative.

Accuracy

[Conditions]

Temperature: 23±5°C, Humidity: 30 to 75%RH, Input waveform: Sine wave, Common mode voltage: 0 V, Crest

factor: 3, Line filter: OFF, Frequency filter: 440 Hz ON, λ (power factor): 1, After warm-up. After zero level

compensation or range value change while wired. f is frequency, 6-month

* These conditions are all accuracy condition in this section.

• Unit of f of reading error is kHz

External Sensor Input, add 50 µV to DC Current accuracy and add

(50 µV / external sensor input rated range)  100% of range to DC power accuracy

Direct current Input, add 500 µA to DC Current accuracy and add

(500 µA / direct current input rated range)  100% of range to DC power accuracy

• Accuracy of waveform display data, Upk and Ipk (reference value)

Voltage: Add 1.5



15/range rated % of range

Current: Direct-add 3



0.5/range rated % of range + 5 mA

External input-add 3



0.05/range rated % of range + 2 mV.

Effective input range is within ±300% (within ±600% for crest factor 6)

• Influenced by changes in temperature after zero level correction or range value changes.

Add 0.02% of range/°C to the voltage DC accuracy, 500 µA/°C to the current DC accuracy, 50 µV/°C to the

external current DC accuracy, and influence of voltage times influence of current to the power DC accuracy.

• Influence of self heating due to current input

When the input signal is current, for AC add 0.00013  I

% of rdg, and for DC add 0.00013  I

% of rdg +

0.004  I

mA to the current and power accuracy. I is the reading value of current (A). Please note that the

influence of self-heating is present until the shunt resistance temperature drops, even when the current input

value is small.

• Additions to accuracy according to the data update rate

Add 0.05% of rdg when it is 100 ms.

• Range of guaranteed accuracy by frequency, voltage, and current

All accuracies between 0.5 Hz and 10 Hz are reference values.

If the voltage exceeds 750 V at 30 kHz–100 kHz, the voltage and power values are reference values.

If the current exceeds 20 A at DC, 10 Hz–45 Hz, or 400 Hz–100 kHz; the current and power accuracies are

reference values.

• Accuracy for crest factor 6: Range accuracy of crest factor 3 for two times range of crest factor 6.

• Influence of self heating due to voltage input

When the input signal is voltage, for AC add 0.0000001  u

% of reading, and for DC add 0.0000001  u

of reading + 0.0000001  u

% of range. u is the reading value of voltage. Please note that the influence of self

heating is present until the resistance temparature drops, ever when the voltage input value is small.

0.5 Hzf45 Hz

45 Hzf66 Hz

66 Hzf1 kHz

1 kHzf10 kHz

10 kHzf50 kHz

50 kHzf100 kHz

0.1% of reading

+ 0.1% of range

0.1% of reading

+ 0.2% of range

0.1% of reading

+ 0.1% of range

0.1% of reading

+ 0.2% of range

{0.1 + 0.05  (f-1)}% of reading

+ 0.2% of range

{0.5 + 0.04  (f-10)}% of reading

+ 0.3% of range

{0.5 + 0.04  (f-10)}% of reading

+0.3% of range

0.1% of reading

+ 0.1% of range

0.1% of reading

+ 0.2% of range

0.1% of reading

+ 0.1% of range

0.1% of reading

+ 0.2% of range

(0.1  f)% of reading

+ 0.2% of range

{1 + 0.08  (f-10)}% of reading

+ 0.3% of range

{1 + 0.08  (f-10)}% of reading

+ 0.3% of range

0.1% of reading

+ 0.1% of range

0.3% of reading

+ 0.2% of range

0.1% of reading

+ 0.1% of range

0.2% of reading

+ 0.2% of range

{0.2 + 0.1  (f-1)}% of reading

+ 0.2% of range

{0.2 + 0.1  (f-1)}% of reading

+ 0.3% of range

{

5.1 + 0.18

 (

f-50

)}

% of reading

+ 0.3% of range

Accuracy ±(reading error + measurement range error) (for crest factor 3)

* Up to 0.02% of the pixels on the LCD may be defective.

Frequency Voltage Current Power

Display

5.7-inch color TFT LCD monitor

640 (horiz.)  480 (vert.) dots

501 (horiz.)  432 (vert.) dots

Same as the data update rate.

Exceptions are listed below.

• The display update interval of numeric display (4, 8, and 16 items) is

200 ms when the data update rate is 100 ms.

• The display update interval of numeric display (ALL, Single List, and

Dual List) is 500 ms when the data update rate is 100 ms or 200 ms.

• The display update rate of the trend display, bar graph display, and

vector display is 1 s when the data update rate is 100 ms to 500 ms.

• The display update interval of the waveform display is approximately

1 s when the data update rate is 100 ms to 1 s. However, it may be

longer depending on the trigger setting.

• At the setting of SLAVE mode, display update rate depends on the

External clock. However it is adopted under faster external condition

than data update rate.

η [%]

User-defined functions

F1–F8

Create equations combining measurement function symbols, and calculate up to

eight numerical data.

Set a efficiency calculation up to 2

Item

Input terminal type

Input type

Measurement

range

Instrument loss (input impedance)

Instantaneous maximum allowable input (20 m second or less)

Instantaneous maximum allowed input (1 second or less)

Continuous maximum allowed input

Continuous maximum common mode voltage (50/60 Hz)

Influence from common mode voltage

Line filter

Frequency filter

A/D converter

Range switching

Auto range functions

Display

Total number of pixels*

Waveform display resolution

Display update rate

(U1+U2)/2

(I1+I2)/2

P1+P2

S1+S2

UΣ [V]

IΣ [A]

PΣ [W]

SΣ [VA]

QΣ [var]

WPΣ [Wh]

WP+Σ [Wh]

WP–Σ [Wh]

qΣ [Ah]

q+Σ [Ah]

q–Σ [Ah]

WQΣ [varh]

WSΣ [VAh]

λΣ

ØΣ [˚]

3 phase, 3 wire

(3 voltage 3 current)

3 phase, 4 wire

PΣ

+QΣ

TYPE1,

TYPE2

TYPE3

TYPE1

TYPE2

TYPE3

S1+S2+S3

Q1+Q2+Q3

WP1

WP2

WP3

WP-1

WP-2

WP-3

q1+q2+q3

q-1

q-2

q-3

P1+P2+P3

n=1

| QΣ(n) |

Time

n=1

SΣ

PΣ

SΣ(

)×Time

cos

SΣ

PΣ

( )

(S1+S2) (S1+S2+S3)

SΣ

–PΣ

Single-phase,

3 wire

(U1+U2+U3)/3

(I1+I2+I3)/3

Q1+Q2

WP1

WP2

CHARGE/DISCHARGE setting

When WPTYPE is set to SOLD/BOUGHT, only positive WPΣ value is added

CHARGE/DISCHARGE setting

WP–1

WP–2

When WPTYPE is set to SOLD/BOUGHT, only negative WPΣ value is added

q–1

q-2

QΣ(

) is the nth reactive power Σ function , and N is the number of data updates. Unit of Time is h.

SΣ(

) is the nth apparent power Σ function, and N is the number of data updates. Unit of Time is h.

Measurement functions

WP [Wh]

WP+

WP-

1 2 3 4

Summary of Contents

Page 1 - WT500 SPECIFICATION

WT500 SPECIFICATIONWT500 SpecificationsInputsSpecificationVoltagePlug-in terminal (safety terminal)Current• Direct input: Large binding post• External

Page 2

WT500 SPECIFICATIONTo ta l power error withrespect to the range foran arbitrary powerfactor λ (exclude λ = 1)Influence of line filterLead/Lag Detectio

Page 3

WT500 SPECIFICATIONHarmonic Measurement Function (/G5 Optional)• During Harmonic Display10 Hz≤f<45 Hz45 Hz≤f≤440 Hz440 Hz<f≤1 kHz1 kHz<f≤2.5

Page 4 - Exterior

Model and Suffix CodesExterior Accessory (sold separately) Rack MountDue to the nature of this product, it is possible to touch its metal parts. Th

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Atec Yokogawa-WT500 User Manual

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Summary of Contents

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