Specifications 2
34980A Service Guide 35
Internal DMM Measurement Characteristics (continued)
[1]
Reading speeds for 60 Hz and (50 Hz) operation; autozero OFF
[2]
6½ digits = 22 bits; 5½ digits = 18 bits; 4½ digits = 15 bits
[3]
Add 20 V for DCV, 4 A for DCI, or 20 m for resistance.
[4)
For 300 VDC, multiply the additional noise error by 3.3.
[5]
Maximum reading rates for 0.01% of AC step additional error. Additional settling delay required when input DC level varies.
[6]
6½ digits = 22 bits; 5½ digits = 18 bits; 4½ digits = 15 bits
[7]
For external trigger or remote operation using default settling delay (Delay Auto)
[8]
Maximum limit with default settling delays defeated
DC Operating Characteristics
[1]
Function
DCV
[4]
, DCI, and Resistance (10 k)
Digits
[2]
6½
6½
5½
5½
4½
Readings
0.6 (0.5)
6 (5)
60 (50)
300
600
Additional RMS Noise
Error
0% of range
0% of range
0.001% of range
0.001% of range
[3]
0.01% of range
[3]
Auto Zero OFF Operation
Following instrument warm-up at calibration
temperature ±1°C and <10 minutes, add 0.0002%
range additional error +5 µV. (For 300 VDC, instead
of 0.0002% of range, use 0.00066% of range)
Settling Considerations
Reading settling times are affected by source
impedance, low dielectric absorption characteristics,
and input signal changes.
AC Operating Characteristics
[5]
Function
ACV, ACI
Digits
[6]
6½
6½
5½
6½
6½
Readings/s
7 s/reading
1
8
[7]
10
100
[8]
AC Filter
Slow (3 Hz)
Medium (20 Hz)
Fast (200 Hz)
Fast (200 Hz)
Fast (200 Hz)
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