34401A Datasheet, PDF (4/6 Pages) Keysight Technologies – 34401A Digital Multimeter

04 | Keysight | 34401A Digital Multimeter - Data Sheet
Measurement Characteristics
DC voltage
Measurement method
A-D linearity
Input resistance
10 MΩ or 0.1V, 1 V, 10 V
ranges
100 V, 1000 V ranges
Input bias current
Input protection
dcV:dcV ratio accuracy
True RMS AC voltage
Measurement method
Crest factor
Additional crest factor
errors (non-sinewave)
Input impedance
Input protection
Resistance
Measurement method
Maximum lead resistance
(4-wire)
Input protection
DC current
Shunt resistance
Input protection
True RMS AC current
Measurement method
Shunt resistance
Input protection
Continuously integrating multi-slope III A-D
converter
0.0002% of reading + 0.0001% of range
Selectable > 10,000 MΩ
10 MΩ ± 1%
< 30 pA at 25 °C
1000 V all ranges
V_input accuracy + V_relevance accuracy
AC-coupled true rms-measures the AC
component of the input with up to 400 Vdc
of bias on any range
Maximum of 5:1 at full scale
Crest factor 1-2: 0.05% of reading
Crest factor 2-3: 0.15% of reading
Crest factor 3-4: 0.30% of reading
Crest factor 4-5: 0.40% of reading
1 MΩ ± 2% in parallel with 100 pF
750 Vrms all ranges
Selectable 4-wire or 2-wire ohms
Current source referenced to LO input
10% of range per lead for 100 Ω, 1 kΩ ranges
1 kΩ per lead on all other ranges
1000 V all ranges
5 Ω for 10 mA, 100 mA
0.1 Ω for 1 A, 3 A
Externally accessible 3 A 250 V fuse
Internal 7 A 250 V fuse
Directly coupled to the fuse and shunt.
AC coupled true RMS measurement
(measures the AC component only).
0.1 Ω for 1 A and 3 A ranges
Externally accessible 3 A 250 V fuse
Internal 7 A 250 V fuse
Frequency and period
Measurement method
Reciprocal counting technique
Voltage ranges
Same as AC voltage function
Gate time
1 s, 100 ms, or 10 ms
Continuity/diode
Response time
300 samples/s with audible tone
Continuity threshold
Selectable from 1 Ω to 1000 Ω
Measurement noise rejection 60 (50) Hz ¹
dc CMRR
140 dB
ac CMRR
70 dB
Integration time and normal mode rejection ²
100 plc/1.67 s (2 s)
60 dB ³
0 plc/167 ms (200 ms)
60 dB ³
1 plc/16.7 ms (20 ms)
60 dB
< 1 plc/3 ms or 800 µs) 0 dB
Operating characteristics ⁴
Function
Digits
Reading/s
dcV, dcl, and resistance 6½
0.6 (0.5)
6½
6 (5)
5½
60 (50)
5½
300
4½
1000
acV, acl
6½
0.15 slow (3 Hz)
6½
1 medium (20 Hz)
6½
10 fast (200 Hz) ⁵
6½
50
Frequency or period
6½
1
5½
9.8
4½
80
1.  For 1 kΩ unbalanced in LO lead, ± 500 V peak maximum.
2.  For power line frequency ± 0.1%.
3.  For power line frequency ± 1% use 40 dB or ± 3% use 30 dB.
4.  Reading speeds for 60 Hz and (50 Hz) operation.
5.  Maximum useful limit with default settling delays defeated.
6.  Speeds are for 4½ digits, delay 0, auto-zero and display OFF.