Additional Ohms Errors; Dc Current; Input Characteristics; Accuracy (8846A) - Fluke 8845A Calibration Manual

Additional Ohms Errors

Digits
6½
6½
5½
5½
4½

DC Current

Input Protection .................................................... Tool-accessible 11 A/1000 V and 440 mA/1000 V fuses
Common Mode Rejection..................................... 140 dB at 50 or 60 Hz ±0.1 % (1 kΩ unbalance)
Normal Mode Rejection ........................................ 60 dB for NPLC of 1 or greater with dc filter off and power line

Input Characteristics

Range Resolution
100 µA 100.0000 µA
1 mA 1.000000 mA
10 mA 10.00000 mA
100 mA 100.0000 mA
1 A 1.000000 A
[1]
3 A 3.00000A
10 A 10.00000 A
[1] Part of 10 A range.

Accuracy (8846A)

Accuracy is given as ± (% measurement + % of range)
24 Hour
Range
(23 ±1 °C)
100 µA 0.01 + 0.02
1 mA 0.007 + 0.005
0.007 + 0.02
10 mA
100 mA 0.01 + 0.004
[2]
1 A 0.03 + 0.02
[1][2]
3 A 0.05 + 0.02
[2]
10 A 0.1 + 0.008
[1] Part of 10 A range
[2] Available at front panel connectors only
NPLC
100 0 % of range
10 0 % of range
1 0.001 % of range
0.001 % of range ±20 mΩ
0.2
0.01 % of range ±20 mΩ
0.02
frequency ±0.1 %
100 dB for NPLC of 1 or greater with dc filter on and power line
frequency ±0.1 %
Resolution
4½ Digits 5½ Digits
10 nA 1 nA
100 nA 10 nA
1 μA
100 nA
1 μA
10 µA
100 µA 10 µA
1 mA 100 µA
1 mA 100 µA
90 Days
(23 ±5 °C)
0.04 + 0.025 0.05 + 0.025
0.030 + 0.005 0.05 + 0.005
0.03 + 0.02 0.05 + 0.02
0.03 + 0.005 0.05 + 0.005
0.04 + 0.02 0.05 + 0.02
0.08 + 0.02 0.1 + 0.02
0.12 + 0.008 0.15 + 0.008
Introduction and Specifications
Additional Noise Error
Shunt Resistance
(Ohms)
6½ Digits
100 Ω
100 pA
100 Ω
1 nA
1 Ω
10 nA
1 Ω
100 nA
1 μA
0.01 Ω
0.01 Ω
10 µA
0.01 Ω
10 µA
Temperature
1 Year
Coefficient/ °C
(23 ±5 °C)
Outside 18 to 28 °C
0.002 + 0.003
0.002 + 0.0005
0.002 + 0.002
0.002 + 0.0005
0.005 + 0.001
0.005 + 0.002
0.005 + 0.0008
Electrical Specifications
Burden Voltage
<0.015 V
<0.15 V
<0.025 V
<0.25 V
<0.05 V
<0.15 V
<0.5 V
1
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