YOKOGAWA WT210 User Manual

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

YOKOGAWA WT210 Specifications

General

Brand	YOKOGAWA
Model	WT210
Category	Measuring Instruments
Language	English