Datasheet
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1. One hour warm-up and a fixed configuration with slow AC filter, sine wave input, and 6½ digits. Temperature within ± 5°C of temperature at calibration (Tcal
between 18-28°C)
2. 90 minute warm-up and a fixed configuration and 6½ digits. Temperature within ± 1°C of temperature at calibration (Tcal between 18-28°C)
3. Relative to calibration standards
4. 20% over range on all ranges except 300VDC and AC ranges and 1 ADC and AC current ranges
5. For sine wave input > 5% of range; for inputs from 1% to 5% of range and < 50 kHz add 0.1% of range additional error; for AC filter slow
6. Typically, 30% of reading error at 1 MHz, limited to 1 x 108 volt-hertz
7. Accuracy for 4-wire ohms. Add 4 ohms uncertainty (typical) for 2-wire ohms function due to conductor and contact resistance variability in the DMM. The 2-
wire resistance accuracy can be improved by measuring a short on each channel and using the built-in y = Mx + b scaling function. See User Guide,
Chapter 3. The series resistance of the 34923/24/25/33/34 limits the use of the 100 ohms resistance range. Keysight recommends the use of 4-wire ohms
for resistance measurements. For high accuracy voltage measurements, select the DMM input resistance setting of > 10 G ohms to minimize the impact of
relay contact resistance.
8. For inputs >100 mV; for inputs 10 mV to 100 mV multiply % of reading error X 10; for 1 sec aperture (6 1/2 digits)
9. Specified only for inputs > 10 mA. For AC filter slow
10. Add 50 uV error for 34923A/24A/33A and 7 μV error for the 34925A
11. Voltage measurements using Fixed-Z input impedance for the 100 V and 300 V ranges.
Additional low frequency error for ACV, ACI (% of reading)
Frequency
AC Filter Slow
AC Filter Medium
AC Filter Fast
10 Hz – 20 Hz
20 Hz – 40 Hz
40 Hz – 100 Hz
100 Hz -200 Hz
200 Hz – 1 kHz
>1 kHz
0
0
0
0
0
0
0.74
0.22
0.06
0.01
0
0
-
-
0.73
0.22
0.18
0
Additional error for frequency, Period (% of reading)
Aperture (Digits)
Frequency
1 second
(6½ digits)
0.1 seconds
(5½ digits)
0.01 seconds (4½ digits)
3 Hz – 5 Hz
5 Hz – 10 Hz
10 Hz – 40 Hz
40 Hz – 100 Hz
100 Hz – 300 Hz
300 Hz – 1 kHz
> 1 kHz
0
0
0
0
0
0
0
0.12
0.17
0.2
0.06
0.03
0.01
0
0.12
0.17
0.2
0.21
0.21
0.07
0.02
Temperature measurement accuracy
Temperature 1-
year accuracy
Type
Best Range
1
Extended Range
1
Temperature
coefficient/
o
C
Thermocouple
(34921A only,
includes cold
junction
accuracy
on terminal
block)
B
E
J
K
N
R
S
T
1100
o
C to 1820
o
C
-150
o
C to 1000
o
C
-150
o
C to 1200
o
C
-100
o
C to 1200
o
C
-100
o
C to 1300
o
C
300
o
C to 1760
o
C
400
o
C to 1760
o
C
-100
o
C to 400
o
C
1.2
o
C
1.0
o
C
1.0
o
C
1.0
o
C
1.0
o
C
1.2
o
C
1.2
o
C
1.0
o
C
400
o
C to 1100
o
C
-200
o
C to -150
o
C
-210
o
C to -150
o
C
-200
o
C to -100
o
C
-200
o
C to -100
o
C
-50
o
C to 300
o
C
-50
o
C to 400
o
C
-200
o
C to -100
o
C
1.8
o
C
1.5
o
C
1.2
o
C
1.5
o
C
1.5
o
C
1.8
o
C
1.8
o
C
1.5
o
C
0.03
o
C
0.03
o
C
0.03
o
C
0.03
o
C
0.03
o
C
0.03
o
C
0.03
o
C
0.03
o
C
RTD
R
0
from 49 Ω
to 2.1 kΩ
-200
o
C to 600
o
C
0.06
o
C
0.003
o
C
Thermistor
2.2k, 5k, 10k
-80
o
C to 150
o
C
0.08
o
C
0.002
o
C
1. For total measurement accuracy, add temperature probe error, for < 1
o
C accuracy, an external fixed reference is required.