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16.3 Functions
Harmonic Measurement (/HRM Option)
Item
Measured item
Method
Frequency range
PLL source
Measured items
FFT data length
FFT processing word length 32 bits
Window function
Sample rate, window width, and upper limit of analysis
Accuracy
Auto range
Display
Item
Display type
Simultaneous display
Display items
16-8
Specifications
Select only a single wiring unit.
PLL synchronization method
Fundamental frequency of the PLL source is in the range of 40 Hz to 440 kHz.
Select voltage or current of each input element.
See "Displayed Items" on page 7-1.
1024
Rectangular
Fundamental Frequency Sample rate
PLL Source f
(Hz)
40≤f<70
70≤f<130
130≤f<250
250≤f≤440
Add ±0.2% of range to the accuracy of normal measurement.
th
However, for n
order component input, add {10/(m+1)}% of the n
th
and n–m
order.
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
Specifications
7-segment LED
3 items
During normal measurement
•
Display function
V (voltage)
VA (apparent power)
PF (power factor)
AHz (current frequency)
Wh± (positive or negative watt hour)
Result of efficiency computation, crest factor computation, four arithmetic operations, and
average active power during integration.
Voltage 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
Window Width against of
(S/s)
the FFT Data Length
(Frequency of the
Fundamental Wave)
f×512
2
f×256
4
f×128
8
f×64
16
A (current)
var (reactive power)
deg (phase angle)
Wh (sum of watt hours)
Current peak
Upper
Limit of Harmonic
Analysis
50
50
50
30
th
order reading to n+m
W (active power)
TIME (elapsed integration time)
VHz (voltage frequency)
Ah (sum of ampere hours)
Ah± (positive or negative ampere hour)
th
order
IM 760401-01E
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