5
Measurement Characteristics
DC voltage
Measurement
method:
Continuously integrating multi-slope IV A/D
converter
Linearity: 0.0002% of reading
(10 V range) + 0.0001% of range
Input
resistance:
0.1 V, 1 V, 10 V ranges 10 MΩ or > 10 GΩ
(selectable)
100 V, 1000 V ranges 10 MΩ ±1% (fixed)
Input bias current: < 50 pA at 25 °C
Input protection: 1000 V
DC CMRR: 140 dB
1
True RMS AC voltage
Measurement
method:
AC-coupled True RMS measurement.
Digital sampling with anti-alias filter.
Crest factor: No additional error for crest factors < 10.
Limited by peak input and 300 kHz bandwidth.
Peak input: 300% of range or 1100 V
Overload
ranging:
Will select higher range if peak input
overload is detected during auto range.
Overload is reported in manual ranging.
AC CMR: 70 dB
2
Maximum input: 400 Vdc, 1100 Vpk
Input impedance: 1 MΩ ± 2% in parallel with < 150 pF
Input protection: 750 Vrms all ranges
Resistance
Measurement
method:
Selectable 2-wire or 4-wire.
Current source referenced to LO input.
Offset
compensation:
Selectable on the 100 Ω, 1 kΩ, and 10 kΩ
ranges
Max. lead
resistance
(4-wire):
10% of range per lead for 100 Ω, 1 kΩ. 1 kΩ
per lead on all other ranges
Input protection: 1000 V on all ranges
DC current
Current shunt: 200 Ω for 100 µA, 1 mA
2 Ω for 10 mA, 100 mA
0.1 Ω for 1 A, 3 A
Input protection: 3 A, 250 V fuse
True RMS AC current
Measurement
method:
AC-coupled true RMS measurement.
Directly coupled to the fuse and shunt.
Digital sampling with anti-alias filter.
Current shunt: 200 Ω for 100 µA, 1 mA
2 Ω for 10 mA, 100 mA
0.1 Ω for 1 A, 3 A
Maximum input: The peak value of the DC + AC current must
be < 300% of range. The RMS current must
be < 3 A including the DC current content.
Input protection: 3 A, 250 V fuse
Frequency and period
Measurement
method:
Reciprocal-counting technique. AC-coupled
input using the AC voltage measurement
function.
Input impedance: 1 MΩ ± 2% in parallel with < 150 pF
Input protection: 750 Vrms all ranges
Capacitance
Measurement
method:
Current input with measurement of
resulting ramp.
Connection type: 2-wire
Temperature
Thermistor: 2.2 kΩ, 5 kΩ, and 10 kΩ
RTD: α = 0.00385
R
o
from 49 Ω to 2.1 kΩ
Diode test
Response time: 300 samples/sec
Continuity
threshold:
Fixed at 10 Ω
Operating characteristics
Maximum readings/second
Digits
Function
3
4.5 5.5 6.5
DCV 50 k 10 k 1 k
2-wire Ω 50 k 10 k 1 k
DCI 50 k 10 k 1 k
Frequency 500 90 10
Period 500 90 10
Filter setting fast med slow
ACV 500 150 50
ACI 500 150 50
Additional specifications
Resolution: See table on page 4
Overall bandwidth,
DCV & DCI:
15 kHz typical @ 20 µs aperture (-3 dB)
Triggering: Pre/Post, Analog Level, Int/Ext, Pos/Neg
Timebase
resolution:
19.9524 µs 0.01% accuracy
Trigger jitter: 2 µs (p-p), 20 µs (p-p) when pre-triggered
1. For 1 kΩ unbalanced in LO lead, ± 500 V peak maximum
2. For 1 kΩ unbalanced in LO lead and < 60 Hz, ± 500 V peak maximum
3. Maximum rate for DCV, DCI, and resistance functions
(using zero settling delay, autozero off, manual range)
(260 strony)
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