26 | Keysight | 34980A Multifunction Switch/Measure Unit - Data Sheet
Additional Low Frequency Error
for ACV, ACI (% of reading)
Additional Error for Frequency,
Period (% of reading)
Frequency
AC Filter Slow
AC Filter Medium AC Filter Fast
Aperture (Digits)
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
–
–
Frequency
1 second
(6½ digits)
0.1 seconds
(5½ digits)
0.01 seconds
(4½ digits)
3 Hz- 5 Hz
0
0
0
0
0
0
0
0.12
0.17
0.2
0.12
0.17
0.2
0.73
0.22
0.18
0
5 Hz - 10 Hz
10 Hz - 40 Hz
40 Hz - 100 Hz
100 Hz - 300 Hz
300 Hz - 1 kHz
> 1 kHz
0.06
0.03
0.01
0
0.21
0.21
0.07
0.02
0
Temperature measurement accuracy
Temperature
coefꢀcient/°C
Temperature 1-year accuracy
Type
Best range [1]
Extended range [1]
Thermocouple
(34921A only,
includes cold
junction accuracy
on terminal block)
B
E
J
K
N
R
S
T
1100°C to 1820°C
–150°C to 1000°C
–150°C to 1200°C
–100°C to 1200°C
–100°C to 1300°C
300°C to 1760°C
400°C to 1760°C
–100°C to 400°C
1.2°C
1.0°C
1.0°C
1.0°C
1.0°C
1.2°C
1.2°C
1.0°C
400°C to 1100°C
–200°C to –150°C
–210°C to –150°C
–200°C to –100°C
–200°C to –100°C
–50°C to 300°C
–50°C to 400°C
–200°C to –100°C
1.8°C
1.5°C
1.2°C
1.5°C
1.5°C
1.8°C
1.8°C
1.5°C
0.03°C
0.03°C
0.03°C
0.03°C
0.03°C
0.03°C
0.03°C
0.03°C
RTD
Ro from
–200°C to 600°C
0.06°C
0.003°C
49 Ω to 2.1 K Ω
Thermistor
2.2 k, 5 k, 10 k
–80°C to 150°C
0.08°C
0.002°C
[1] For total measurement accuracy, add temperature probe error; for <1°C accuracy, an external fixed reference is required
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