APPENDIX
223
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 M
Ω
± 2%, in parallel with 100 pF
Input
Protection:
750 Vrms on all ranges
True RMS AC
Current
Range
Shunt
Burden Voltage
1mA
100
Ω
<0.15V
10mA
5
Ω
<0.07V
100mA
5
Ω
<0.7V
1A
0.1
Ω
<0.8V
10A
10m
Ω
<0.5V
Input
Protection:
Externally accessible 1.25A, 250 V fuse
Internal 12A, 250 V fuse
Operating Characteristics
[8]
Function
Rate
Digits Readings/s
[10]
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
ACfilter,
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
