Atec Yokogawa-WT500 - Manual

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 M
Ω, 13 pF
Current
• Direct input: Approximately 5 m
Ω + approximately 0.1 µH
• External sensor input: Approximately 100 k Ω
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)
ϫ i(n) equation which is only positive value
WP- is summation of product of u (n) ϫ 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) ϫ 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) ϫ 100% of range to DC power accuracy
• Accuracy of waveform display data, Upk and Ipk (reference value)
Voltage: Add 1.5 ϫ 15/range rated % of range
Current: Direct-add 3 ϫ 0.5/range rated % of range + 5 mA
External input-add 3 ϫ 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 ϫ I 2 % of rdg, and for DC add 0.00013 ϫ I 2 % of rdg +
0.004 ϫ I 2 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 ϫ u 2 % of reading, and for DC add 0.0000001 ϫ u 2 %
of reading + 0.0000001 ϫ u 2 % 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.
DC
0.5 Hz ϹfϽ45 Hz
45 Hz ϹfϹ66 Hz
66 Hz ϽfϹ1 kHz
1 kHz ϽfϹ10 kHz
10 kHz ϽfϹ50 kHz
50 kHz ϽfϹ100 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 ϫ (f-1)}% of reading
+ 0.2% of range
{0.5 + 0.04 ϫ (f-10)}% of reading
+ 0.3% of range
{0.5 + 0.04 ϫ (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 ϫ f)% of reading
+ 0.2% of range
{1 + 0.08 ϫ (f-10)}% of reading
+ 0.3% of range
{1 + 0.08 ϫ (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 ϫ (f-1)}% of reading
+ 0.2% of range
{0.2 + 0.1 ϫ (f-1)}% of reading
+ 0.3% of range
{5.1 + 0.18 ϫ (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.) ϫ 480 (vert.) dots
501 (horiz.) ϫ 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 U Σ [V]
I Σ [A]
P Σ [W]
S Σ [VA]
Q Σ [var]
WP Σ [Wh]
WP+ Σ [Wh]
WP– Σ [Wh]
q Σ [Ah]
q+ Σ [Ah]
q– Σ [Ah]
WQ Σ [varh]
WS Σ [VAh]
λΣ
Ø Σ [˚]
3 phase, 3 wire
3 phase, 3 wire
(3 voltage 3 current)
3 phase, 4 wire
P Σ 2 +Q Σ 2
TYPE1,
TYPE2
TYPE3
TYPE1
TYPE2
TYPE3
S1+S2+S3
Q1+Q2+Q3
Q1 + Q2 + Q3
WP1 + WP2 + WP3
WP + 1 + WP + 2 + WP + 3
WP-1 + WP-2 + WP-3
q1+q2+q3
q
+ 1 + q + 2 + q + 3
q-1 + q-2 + q-3
P1+P2+P3
N
1
Σ
N
n=1
N
1
Σ
N
n=1
| Q Σ(n) | × Time
N
1
Σ
N
n=1
S Σ
P Σ
S Σ(n)×Time
cos
-
1
S Σ
P Σ
( )
3
2
3
3
(S1+S2) (S1+S2+S3)
S Σ 2 –P Σ 2
Single-phase,
3 wire
(U1+U2+U3)/3
(I1+I2+I3)/3
Q1+Q2
Q1+Q2
WP1
+ WP2
CHARGE/DISCHARGE setting
WP
+ 1 + WP + 2
When WPTYPE is set to SOLD/BOUGHT, only positive WP Σ value is added
CHARGE/DISCHARGE setting
WP–1
+ WP–2
When WPTYPE is set to SOLD/BOUGHT, only negative WP Σ value is added
q1 + q2
q + 1 + q + 2
q–1 + q-2
Q Σ(n) is the nth reactive power Σ function , and N is the number of data updates. Unit of Time is h.
S Σ( n ) 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-