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Chapter 8 Specifications
AC Characteristics
Measuring Characteristics
Measurement Noise Rejection
AC CMRR
70 dB
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
Input Protection:
750 V rms all ranges
True RMS AC Current
Measurement Method:
Direct coupled to the fuse and shunt.
AC-coupled True RMS measurement
(measures the ac component only).
Shunt Resistor:
0.1
Burden Voltage:
1 A range: < 1 V rms
3 A range: < 2 V rms
Input Protection:
Externally accessible 3A, 250 V fuse
Internal 7A, 250 V fuse
Settling Considerations
Applying >300 V rms (or >1 A rms) will cause self-heating in
signal-conditioning components. These errors are included in
the instrument specifications. Internal temperature changes
due to self-heating may cause additional error on lower ac
voltage ranges. The additional error will be less than 0.02%
of reading and will generally dissipate within a few minutes.
[ 8 ]
2%, in parallel with 100 pF
for 1 A and 3 A ranges
Operating Characteristics
Function
Digits
Reading/s
ACV, ACI
6
1
7 sec/reading
2
6
1
2
1
6
2
6
1
2
6
1
2
System Speeds
,
[ 11 ]
[ 12 ]
Function or Range Change
Autorange Time
ASCII readings to RS-232
ASCII readings to HP-IB
Max. Internal Trigger Rate
Max. External Trigger Rate to Memory
Max. External Trigger Rate to HP-IB/RS-232
Specifications are for 1-hour warm-up at 6
[ 1 ]
Slow ac filter, sinewave input.
Relative to calibration standards.
[ 2 ]
20% overrange on all ranges, except 750 Vac, 3 A range.
[ 3 ]
Specifications are for sinewave input >5% of range.
[ 4 ]
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.
750 Vac range limited to 100 kHz or 8x10
[ 5 ]
Typically 30% of reading error at 1 MHz.
[ 6 ]
For frequencies below 100 Hz, slow AC filter specified
[ 7 ]
for sinewave input only.
For 1 k unbalance in LO lead.
[ 8 ]
]
Maximum reading rates for 0.01% of ac step
[ 9
additional error. Additional settling delay required
when input dc level varies.
For External Trigger or remote operation using default
[ 10 ]
settling delay ( Delay Auto ).
Maximum useful limit with default settling delays defeated.
[ 11 ]
1
Speeds are for 4
digits, Delay 0, Display OFF, and
[ 12 ]
2
Fast AC filter.
[ 9 ]
AC Filter
Slow
1
Medium
1.6
Fast
[ 10 ]
10
Fast
50
Fast
[ 11 ]
5/sec
<0.8 sec
50/sec
50/sec
50/sec
50/sec
50/sec
1
digits,
2
7
Volt-Hz.
8
219
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