16-8
IM 760401-01E
Harmonic Measurement (/HRM Option)
Item
Specifications
Measured item
Select only a single wiring unit.
Method
PLL synchronization method
Frequency range
Fundamental frequency of the PLL source is in the range of 40 Hz to 440 kHz.
PLL source
Select voltage or current of each input element.
Measured items
See “Displayed Items” on page 7-1.
FFT data length
1024
FFT processing word length 32 bits
Window function
Rectangular
Sample rate, window width, and upper limit of analysis
Fundamental Frequency Sample rate
Window Width against of
Upper
PLL Source f
(S/s)
the FFT Data Length
Limit of Harmonic
(Hz)
(Frequency of the
Analysis
Fundamental Wave)
40
≤
f<70
f
×
512
2
50
70
≤
f<130
f
×
256
4
50
130
≤
f<250
f
×
128
8
50
250
≤
f
≤
440
f
×
64
16
30
Accuracy
Add
±
0.2% of range to the accuracy of normal measurement.
However, for n
th
order component input, add {10/(m+1)}% of the n
th
order reading to n+m
th
order
and n–m
th
order.
Auto range
Step up
When the measured value exceeds 200% of the rated range or the peak value exceeds
approximately 300% (Approx. 600% if the crest factor is set to 6) of the rated range.
Step down
Range down: When the measured value becomes less than 30% of the rated range and the
peak value is less than 300% (Less than or equal to 600% if the crest factor is set to 6) of the
subordinate range
Display
Item
Specifications
Display type
7-segment LED
Simultaneous display
3 items
Display items
During normal measurement
•
Display function
V (voltage)
A (current)
W (active power)
VA (apparent power)
var (reactive power)
TIME (elapsed integration time)
PF (power factor)
deg (phase angle)
VHz (voltage frequency)
AHz (current frequency)
Wh (sum of watt hours)
Ah (sum of ampere hours)
Wh
±
(positive or negative watt hour)
Ah
±
(positive or negative ampere hour)
Result of efficiency computation, crest factor computation, four arithmetic operations, and
average active power during integration.
Voltage peak
Current peak
•
Display area
•
Display A
V, A, W, VA, var, and TIME
•
Display B
V, A, W, PF, and deg
•
Display C
V, A, W, VHz, AHz, Wh, Wh
±
, Ah, Ah
±
, result of efficiency computation, crest factor
computation, four arithmetic operations, and average active power during integration,
voltage peak, and current peak
16.3 Functions
Summary of Contents for WT210
Page 1: ...Digital Power Meter IM 760401 01E 3rd Edition ...
Page 208: ...13 18 IM 760401 01E 13 3 Sample Program Image ...
Page 214: ...13 24 IM 760401 01E 13 5 Sample Program Output of Normal Measurement Data ...
Page 266: ...14 50 IM 760401 01E 14 6 Sample Program Image ...
Page 272: ...14 56 IM 760401 01E 14 8 Sample Program Output of Normal Measurement Data ...