Nieaf Instruments NI 11, Руководство пользователя

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22
1-3 Electrical Specifications
Accuracy is
±
(% r number
of digits) at 23°C
±
5°C < 80%RH.
Temperature coefficient :
Add 0.2 x (Specified accuracy)
/
°C,
< 18°C, > 28°C
.
Function Range Accuracy
V
0~400.0Vrms
400~600Vrms
± (
1.0%+ 5 dgt)
50Hz ~ 500Hz
*1
V
0~400.0 V
400~600 V
± (
0.7% + 2 dgt)
Overload protection : 600 Vrms
Input impedance : 1M
Ω
// less than
100pF.
AC Conversion Type :
NI 11 :
AC Conversion are average
sensing rms indication calibrated to
the rms value of a sine wave input.
NI 11R :
*1 :
Reading less than 15% of full
scale (4000 digits) is needed to add
4 digits and the settling time will
increase.
*2 AC Conversions are ac-acoupled,
true rms responding, calibrated to the
rms value of a sine wave input.
Accuracies are given for sine wave at
full scale and non-sine wave below
half scale. For non-sine wave add the
following Crest Factor corrections :
For Crest Factor of 1.4 to 2.0, add
1.0% to accuracy.
For Crest Factor of 2.0 to 2.5, add
2.5% to accuracy.
For Crest Factor of 2.5 to 3.0, add
4.0% to accuracy.
CF
≦
2 600V//600A
EMC : EN 61326-1
Shock vibration :
Sinusoidal vibration per MIL-T-
28800E (5 ~ 55 Hz, 3g maximum).