YOKOGAWA CW10 - Accuracy

23
10.2 Accuracy
23± 5°C, 80%RH or less
Accuracy: ±(% of reading + digits)
(1) Voltage
Rms-value detection
Function Range
Resolution
(Maximum reading)
Accuracy*
DCV
100 V 99.99 V
0.7% + 2
1000 V 999.9 V
ACV
100 V 99.99 V
1.0% + 5
50 ≤ f ≤ 500 Hz
1000 V 999.9 V
LPF
ACV
100 V 99.99 V
50 ≤ f ≤ 60 Hz: 1.0% + 5
60 < f ≤ 400 Hz: 5.0% + 5
1000 V 999.9 V
* DCV<1000 digits: add 6 digits to accuracy
ACV<1000 digits: add 3 digits to accuracy
Maximum input voltage: 1000 Vrms, 1414.2 Vpk
Input impedance: approx. 3.5MΩ, <100pF
AC+DC accuracy = ACV accuracy + DCV accuracy
Crest factor effects
1.4< CF≤ 2.0: add 1.0% of reading to accuracy
2.0< CF≤ 2.5: add 2.5% of reading to accuracy
2.5< CF≤ 3.0: add 4.0% of reading to accuracy
Maximum input voltage 690 Vrms CF=2, 460Vrms CF=3
(2) Current
Rms-value detection
Function Range
Resolution
(Maximum reading)
Accuracy
DCA
100 A 99.99 A 1.5% + 20
600 A 600.0 A*** 1.5% + 5*
ACA
100 A** 99.99 A
50 ≤ f ≤ 60 Hz: 1.5% + 5*
60 < f ≤ 400 Hz: 2.0% + 5*
600 A 600.0 A***
LPF
ACA
100 A** 99.99 A
50 ≤ f ≤ 60 Hz: 1.5% + 5*
60 < f ≤ 400 Hz: 5.0% + 5*
600 A 600.0 A***
* The measured value <1000 digits: add 5 digits to accuracy
** Input current ≥ 0.10A at 100 A range of ACA and LPF ACA
*** 600 A : Guaranteed accuracy (not maximum reading)
Maximum input current: 600 Arms, 848.5Apk
Conductor position effects: ±1.0% of reading
AC+DC accuracy = ACA accuracy + DCA accuracy
Crest factor effects
1.4< CF≤ 2.0: add 1.0% of reading to accuracy
2.0< CF≤ 2.5: add 2.5% of reading to accuracy
2.5< CF≤ 3.0: add 4.0% of reading to accuracy
Maximum input current: 420 Arms CF=2, 280 Arms CF=3
DCA accuracy: after DCA zero adjustment