GW Instek GPM-8310, Руководство пользователя

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APPENDIX
233
Accuracy of apparent
power S voltage ac current accuracy
Accuracy of reactive power
Q accuracy of apparent power + ( √ 1.0004 - λ 2) - ( √ 1 -
λ 2) ×100 %
Accuracy of power factor λ
± [(
λ
-
λ
/1.0002)+ 丨 cosø-cos{ø+sin-1 (influence from
the power factor when λ = 0%/100)}
丨
] ±1 digit
when voltage and current are at the measurement
range rated input
Accuracy of phase
difference
Φ
± [
丨
ø-cos-1( λ /1.0002)
丨
+ sin-1 (influence from the
power factor when λ = 0 % / 100)] ± 1 digit when
voltage and current are at the measurement range
rated input
Accuracy when the crest
factor is set to 6 or 6A
accuracy obtained by doubling the measurement
range error for the accuracy when the crest factor is
set to 3
Accuracy changes caused
by data update interval
When the data update interval is 100 ms, and Auto,
add 0.05% of reading to the 0.1 Hz to 1 kHz
accuracy.
* f is the frequency of input signal in kHz
Voltage, Current and Active Power Measurements
Item Specifications
Measurement method Digital sampling method
Crest factor 3 or 6 (6A)
Wiring system Single-phase , two-wire(1 P2 W)
Range select Select manual or auto ranging
Auto range
Auto-range increase
The range is upped when any of the following
conditions is met.
Crest factor 3 Urms or Irms exceeds 130% of the
currently set measurement range.
Upk, Ipk value of the input signal
exceeds 300% of the currently set
measurement range.
Crest factor 6 Urms or Irms exceeds 130% of the
currently set measurement range.
Upk, Ipk value of the input signal
exceeds 600% of the currently set
measurement range.
Crest factor 6A Urms or Irms exceeds 260% of the
currently set measurement range.
Upk, Ipk value of the input signal
exceeds 600% of the currently set
measurement range.