GW Instek GDM-8261 User Manual - Manual (Page 217)

APPENDIX
217
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
Fast 200 Hz – 300 kHz
Input
Impedance: 1 MΩ ± 2%, in parallel with 100 pF
Input
Protection: 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
Protection: 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