Dc Current - Fluke 8845A User Manual

8845A/8846A
Users Manual
8845A Accuracy
Accuracy is given as ± (% measurement + % of range)
Range
100 Ω
1 kΩ
10 kΩ
100 kΩ
1 MΩ
10 MΩ
100 MΩ
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, limits of
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 analog filter off and power line
Analog Filter............................................................ When using the analog filter, specifications are relative to within one
Input Characteristics
Range
100 μA
1 mA
10 mA
100 mA
[3]
400 mA
[2]
1 A
[1]
3 A
10 A
[1] Part of 10 A range.
[2] Available on the front panel terminal 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.
1-16
24 Hour 90 Days
(23 ±1 °C) (23 ±5 °C)
0.003 + 0.003 0.008 + 0.004
0.002 + 0.0005 0.008 + 0.001
0.002 + 0.0005 0.008 + 0.001
0.002 + 0.0005 0.008 + 0.001
0.002 + 0.001 0.008 + 0.001
0.015 + 0.001 0.02 + 0.001
0.3 + 0.01 0.8 + 0.01
NPLC
100
10
1
0.2
0.02
Resolution
4½ Digits
100.0000 μA 10 nA
1.000000 mA 100 nA
1 μA
10.00000 mA
10 μA
100.0000 mA
400.000 mA 100 μA
1.000000 A 100 μA
3.00000A 1 mA
10.00000 A 1 mA
1 Year
(23 ±5 °C)
0.01 + 0.004
0.01 + 0.001
0.01 + 0.001
0.01 + 0.001
0.01 + 0.001
0.04 + 0.001
0.8 + 0.01
Additional NPLC Noise Error
0 % of range
0 % of range
0.001 % of range
0.003 % of range ±7 mΩ
0.017 % of range ±15 mΩ
400 mA continuous 550 mA for 2 minutes on, 1 minute off.
frequency ±0.1 %
100 dB for NPLC of 1 or greater with analog filter on and power line
frequency ±0.1 %
hour of using the ZERO function for that range and NPLC setting.
Resolution
Shunt Resistance
5½ Digits 6½ Digits
1 nA 100 pA
10 nA 1 nA
100 nA 10 nA
1 μA
100 nA
10 μA 1 μA
10 μA 1 μA
100 μA 10 μA
100 μA 10 μA
Temperature
Coefficient/ °C
Outside 18 to 28 °C
0.0006 + 0.0005
0.0006 + 0.0001
0.0006 + 0.0001
0.0006 + 0.0001
0.0010 + 0.0002
0.0030 + 0.0004
0.1500 + 0.0002
Burden Voltage
(Ohms)
100 Ω
<0.015 V
100 Ω
<0.15 V
1 Ω
<0.025 V
1 Ω
<0.25 V
1 Ω <0.50 V
0.01 Ω <0.05 V
0.01 Ω <0.15 V
0.01 Ω
<0.5 V