Instructions

Introduction and Specifications
Electrical Specifications 1
1-17
Accuracy (8846A)
Accuracy is given as ± (% measurement + % of range)
Range
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
100 μA 0.01 + 0.02 0.04 + 0.025 0.05 + 0.025 0.002 + 0.003
1 mA 0.007 + 0.005 0.030 + 0.005 0.05 + 0.005 0.002 + 0.0005
10 mA 0.007 + 0.02 0.03 + 0.02 0.05 + 0.02 0.002 + 0.002
100 mA 0.01 + 0.004 0.03 + 0.005 0.05 + 0.005 0.002 + 0.0005
400 mA
[3]
0.03 + 0.004 0.04 + 0.005 0.05 + 0.005 0.005 + 0.0005
1 A
[2]
0.03 + 0.02 0.04 + 0.02 0.05 + 0.02 0.005 + 0.001
3 A
[1][2]
0.05 + 0.02 0.08 + 0.02 0.1 + 0.02 0.005 + 0.002
10 A
[2]
0.1 + 0.008 0.12 + 0.008 0.15 + 0.008 0.005 + 0.0008
[1] Part of 10 A range
[2] Available at front panel connectors only
[3] 400 mA available in software version 2.0 or greater only. 400 mA continuously; 550 mA for 2 minutes on, 1
minute off.
Accuracy (8845A)
Accuracy is given as ± (% measurement + % of range)
Range
24 Hour
(23 ±1 °C)
90 Days
(23 ±5 °C)
1 Year
(23 ±5 °C)
Temperature
Coefficient/ °C
Outside 18 to 28 °C
100 μA 0.01 + 0.02 0.04 + 0.025 0.05 + 0.025 0.002 + 0.003
1 mA 0.007 + 0.005 0.030 + 0.005 0.05 + 0.005 0.002 + 0.0005
10 mA 0.007 + 0.02 0.03 + 0.02 0.05 + 0.02 0.002 + 0.002
100 mA 0.01 + 0.004 0.03 + 0.005 0.05 + 0.005 0.002 + 0.0005
400 mA
[3]
0.03 + 0.004 0.04 + 0.005 0.05 + 0.005 0.005 + 0.0005
1 A
[2]
0.03 + 0.02 0.04 + 0.02 0.05 + 0.02 0.005 + 0.001
3 A
[1][2]
0.05 + 0.02 0.08 + 0.02 0.10 + 0.02 0.005 + 0.002
10 A
[2]
0.10 + 0.008 0.12 + 0.008 0.15 + 0.008 0.005 + 0.0008
[1] Part of 10 A range
[2] Available at front panel connectors only
[3] 400 mA available in software version 2.0 or greater only. 400 mA continuously; 550 mA for 2 minutes on, 1
minute off.
Additional Current Errors
Digits NPLC
Additional NPLC Noise Error for
1 mA, 100 mA, 400 mA, 3 A and
10 A
Additional NPLC Noise Error
for 100 μA, 10 mA, 1 A
6½ 100 0 % of range 0 % of range
6½ 10 0 % of range 0 % of range
5½ 1 0.001 % of range 0.01 % of range
5½ 0.2
0.011 % of range ±4 μA 0.11 % of range ±4 μA
4½ 0.02
0.04 % of range ±4 μA 0.28 % of range ±4 μA
AC Current
The following ac current specifications are for sinusoidal signals with amplitudes greater than 5 % of range. For inputs
from 1 % to 5 % of range, add an additional error of 0.1 % of range.
Input Protection....................................................... Tool accessible 11 A/1000 V and 440 mA/1000 V fuses, limits of
400 mA continuous 550 mA for 2 minutes on, 1 minute off.
Measurement Method ............................................. ac-coupled true-rms, dc-coupled to the fuse and shunt (no blocking
capacitor)
AC Filter Bandwidth
Slow .................................................................... 3 Hz to 10 kHz
Medium ............................................................... 20 Hz to 10 kHz