Fluke 8845A, User Manual

Page: 25 / 103

Introduction and Specifications
Electrical Specifications
1
1-15
8845A Accuracy
Accuracy is given as
±
(% measu % 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
Ω
0.003 + 0.003 0.008 + 0.004 0.01 + 0.004 0.0006 + 0.0005
1 k
Ω
0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
10 k
Ω
0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
100 k
Ω
0.002 + 0.0005 0.008 + 0.001 0.01 + 0.001 0.0006 + 0.0001
1 M
Ω
0.002 + 0.001 0.008 + 0.001 0.01 + 0.001 0.0010 + 0.0002
10 M
Ω
0.015 + 0.001 0.02 + 0.001 0.04 + 0.001 0.0030 + 0.0004
100 M
Ω
0.3 + 0.01 0.8 + 0.01 0.8 + 0.01 0.1500 + 0.0002
Additional Ohms Errors
Digits NPLC Additional NPLC Noise Error
6½ 100 0 % of range
6½ 10 0 % of range
5½ 1 0.001 % of range
5½ 0.2 0.003 % of range
±
7 m
Ω
4½ 0.02
0.017 % of range
±
15 m
Ω
DC Current
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.
Common Mode Rejection ............................................ 140 dB at 50 or 60 Hz
±
0.1 % (1 k
Ω
unbalance)
Normal Mode Rejection .......................................... 60 dB for NPLC of 1 or greater with analog filter off and power line
frequency
±
0.1 %
100 dB for NPLC of 1 or greater with analog filter on and power line
frequency
±
0.1 %
Analog Filter............................................................ When using the analog filter, specifications are relative to within one
hour of using the ZERO function for that range and NPLC setting.
Input Characteristics
Resolution
Range Resolution
4½ Digits 5½ Digits 6½ Digits
Shunt Resistance
(Ohms)
Burden Voltage
100
μ
A 100.0000
μ
A
10 nA 1 nA 100 pA
100
Ω
<0.015 V
1 mA 1.000000 mA 100 nA 10 nA 1 nA
100
Ω
<0.15 V
10 mA 10.00000 mA 1
μ
A 100 nA 10 nA 1
Ω
<0.025 V
100 mA 100.0000 mA
10
μ
A 1
μ
A
100 nA
1
Ω <0.25 V
400 mA
[3]
400.000 mA 100 μ
A 10
μ
A 1
μ
A 1
Ω <0.50 V
1 A
[2]
1.000000 A
100
μ
A 10
μ
A 1
μ
A 0.01
Ω <0.05 V
3 A
[1]
3.00000A 1 mA 100 μ
A 10
μ
A 0.01
Ω <0.15 V
10 A 10.00000 A 1 mA
100
μ
A 10
μ
A 0.01
Ω
<0.5 V
[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.