GW Instek GDM-8261 - Page 188

GDM-8261 User Manual
188
Measuring Characteristics
True RMS AC
Voltage
Measurement
Method:
AC-coupled True RMS – measures the ac
component of input with up to 400 Vdc of
bias on any range.
Crest Factor Maximum 5:1 at full scale
AC Filter
Bandwidth
Slow 3 Hz – 300 kHz
Medium 20 Hz – 300 kHz
F
ast 200 Hz – 300 kHz
Input
Impedance:
1 MΩ ± 2%, in paralle
l with 100 pF
Input
Protect
ion:
750 Vrms on all ranges
True RMS AC
Current
Range Shunt Burden Voltage
1mA
100Ω
<0.15V
10mA
5Ω
<0.07V
100mA
5Ω
<0.7V
1A
0.1Ω
<0.8V
10A
10mΩ
<0.5V
Input
Protect
ion:
Externally accessible 1.25A, 250 V fuse
Internal 12A, 250 V fuse
Operating Characteristics
[8]
Function Rate Digits Readings/s AC Bandwidth
ACV,
ACI Slow
6 ½ 1.2
(sec/reading)
3 Hz – 300 kHz
Medium 5 ½ 3.38 20 Hz – 300 kHz
Fast 4 ½ 30 200 Hz – 300 kHz
[ 1 ] Specifications are for 1-hour warm-up at 6 1⁄2 digits, Slow ac filter,
sinewave input.
[ 2 ] Relative to calibration standards.
[ 3 ] 20% overrange on all ranges, except 750 Vac, 10A range.
[ 4 ] Specifications are for sinewave input >5% of range. For inputs from
1% to 5% of range and <50 kHz, add 0.1% of range additional error. For 50
kHz to 100 kHz, add 0.13% of range.
[ 5 ] 750 Vac range limited to 100 kHz
[ 6 ] Typically 30% of reading error at 1 MHz.
[ 7 ] For frequencies below 100 Hz, slow AC filter specified for sinewave
input only.
[ 8 ] Additional settling delay required when input dc level varies.
[ 9 ] 0˚C~18˚C, 28˚C~55˚C
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