Ac Current - Fluke 8845A User Manual

8845A/8846A
Users Manual

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.
Measurement Method ........................................... ac-coupled true-rms, dc-coupled to the fuse and shunt (no blocking
AC Filter Bandwidth
Slow .................................................................... 3 Hz to 10 kHz
Medium ............................................................... 20 Hz to 10 kHz
Fast ..................................................................... 200 Hz to 10 kHz
Maximum Crest Factor ......................................... 5:1 at full scale
Additional Crest Factor Errors (<100 Hz) ........... Crest Factor 1-2, 0.05 % of full scale
Input Characteristics
Full Scale
Range
(6½ Digits)
[1]
100 A 100.0000 A
[1]
1 mA 1.000000 mA
10 mA 10.00000 mA
100 mA 100.0000 mA
1 A 1.000000 A
3 A[2] 3.00000 A
10 A 10.00000 A
[1] 8846A Only
[2] Part of 10 A range
8846A Accuracy
Accuracy is given as
Range
100 A
1 mA
10 mA
100 mA
[2]
1 A
1-16
Resolution
4½ Digits 5½ Digits
10 nA
100 nA
1 A
10 µA
100 µA
1 mA
1 mA
(% measurement + % of range)
Frequency 24 Hour
(Hz)
(23 1 C)
3 – 5 Hz 1.0 + 0.04
5 – 10 Hz 0.3 + 0.04
10 Hz – 5 kHz 0.1 + 0.04
5 – 10 kHz 0.2 + 0.25
3 – 5 Hz 1.0 + 0.04
5 – 10 Hz 0.3 + 0.04
10 Hz – 5 kHz 0.1 + 0.04
5 – 10 kHz 0.2 + 0.25
3 – 5 Hz 1.0 + 0.04
5 – 10 Hz 0.3 + 0.04
10 Hz – 5 kHz 0.1 + 0.04
5 – 10 kHz 0.2 + 0.25
3 – 5 Hz 1.0 + 0.04
5 – 10 Hz 0.3 + 0.04
10 Hz – 5 kHz 0.1 + 0.04
5 – 10 kHz 0.2 + 0.25
3 – 5 Hz 1.0 + 0.04
5 – 10 Hz 0.3 + 0.04
10 Hz – 5 kHz 0.1 + 0.04
5 – 10 kHz 0.35 + 0.7
capacitor)
Crest Factor 2-3, 0.2 % of full scale
Crest Factor 3-4, 0.4 % of full scale
Crest Factor 4-5, 0.5 % of full scale
Shunt Resistance
6½ Digits
1 nA 100 pA
10 nA 1 nA
100 nA 10 nA
100 nA
1 A
10 µA
1 A
100 µA
10 A
100 µA 10 µA
90 Days
(23 5 C)
1.0 + 0.04 1.0 + 0.04
0.3 + 0.04 0.3 + 0.04
0.1 + 0.04 0.1 + 0.04
0.2 + 0.25 0.2 + 0.25
1.0 + 0.04 1.0 + 0.04
0.3 + 0.04 0.3 + 0.04
0.1 + 0.04 0.1 + 0.04
0.2 + 0.25 0.2 + 0.25
1.0 + 0.04 1.0 + 0.04
0.3 + 0.04 0.3 + 0.04
0.1 + 0.04 0.1+ 0.04
0.2 + 0.25 0.2 + 0.25
1.0 + 0.04 1.0 + 0.04
0.3 + 0.04 0.3 + 0.04
0.1 + 0.04 0.1 + 0.04
0.2 + 0.25 0.2 + 0.25
1.0 + 0.04 1.0 + 0.04
0.3 + 0.04 0.3 + 0.04
0.1 + 0.04 0.1 + 0.04
0.35 + 0.7 0.35 + 0.7
Burden Voltage
(Ohms)
<0.015 V
100
<0.15 V
100
1 <0.025 V
<0.25 V
1
<0.05 V
0.01
<0.05 V
0.01
<0.5 V
0.01
Temperature
1 Year
Coefficient/ C
(23 5 C)
Outside 18 to 28 C
0.1 + 0.006
0.035 + 0.006
0.015 + 0.006
0.03 + 0.006
0.1 + 0.006
0.035 + 0.006
0.015 + 0.006
0.03 + 0.006
0.1 + 0.006
0.035 + 0.006
0.015 + 0.006
0.03 + 0.006
0.1 + 0.006
0.035 + 0.006
0.015 + 0.006
0.03 + 0.006
0.1 + 0.006
0.035 + 0.006
0.015 + 0.006
0.03 + 0.006