Dc Current - Fluke 8508A User Manual

8508A
Users Manual

DC Current

Range
95 % Confidence Level
200 µA
2 mA
20 mA
200 mA
2 A
20 A
99 % Confidence Level
200 µA
2 mA
20 mA
200 mA
2 A
20 A
Range
200 μA
2 mA
20 mA
200 mA
2 A
20 A
Type........................................................................ Multi-slope, multi-cycle A-D Converter
Protection
Front Input............................................................... 20 A rms
Rear Input ............................................................... 2 A rms, Rear Panel Fuse
Settling Time
200 μA to 200 mA Ranges, to 10 ppm step size .... Filter Out < 50 ms, Filter In < 1 s
2 A Range
to 100 ppm step size........................................... < 1 s
to 75 ppm step size ............................................. < 30 s
to 30 ppm step size ............................................. < 5 minutes
20 A Range (at 10 A)
to 300 ppm step size........................................... < 1 s
to 250 ppm step size........................................... < 30 s
to 100 ppm step size........................................... < 5 minutes
5-6
Uncertainty Relative to Cal Stds
[15]
Full Scale
24 hour
TCal ±1 °C
199.990 00 5.5 + 2.0
1.999 900 0 5.5 + 2.0
19.999 000 6.5 + 2.0
199.990 00 28 + 4.0
1.999 900 0 80 + 8.0
19.999 000 200 + 20
199.990 00 7.0 + 2.0
1.999 900 0 7.0 + 2.0
19.999 000 8.0 + 2.0
199.990 00 35 + 4.0
1.999 900 0 100 + 8.0
19.999 000 250 + 20
DC Current (Secondary Specifications)
Input Impedance (Ω)
Front Rear
150 150
15.2 15.2
1.8
1.2
0.3
0.04
[1] [2] [3]

DC Current

± (ppm Reading + ppm Range)
90 day 365 day
TCal ±1 °C TCal ±1 °C
6.0 + 2.0 6.5 + 2.0
6.0 + 2.0 6.5 + 2.0
7.0 + 2.0 8.0 + 2.0
30 + 4.0 33 + 4.0
125 + 8.0 170 + 8.0
290 + 20 380 + 20
7.5 + 2.0 8.0 + 2.0
7.5 + 2.0 8.0 + 2.0
9.0 + 2.0 10 + 2.0
37 + 4.0 40 + 4.0
150 + 8.0 205 + 8.0
350 + 20 450 + 20
15 °C - 30 °C
± ppm Reading/°C
0.4
0.4
1.9 1.2
1.3 6. 0
0.4 8.0
- 15
Absolute Uncertainties
[4]
365 day
TCal ±1 °C
12 + 2.0
12 + 2.0
13 + 2.0
36 + 4.0
170 + 8.0
380 + 20
15 + 2.0
15 + 2.0
16 + 2.0
45 + 4.0
210 + 8.0
455 + 20
[1] [2] [3]
Temperature Coefficient
5 °C - 15 °C
5 °C - 40 °C
30 °C - 40 °C
0.6
0.6
1.8
9.0
12
20
365 day
TCal ±5 °C
12 + 2.0
12 + 2.0
14 + 2.0
48 + 4.0
185 + 8.0
400 + 20
16 + 2.0
16 + 2.0
18 + 2.0
60 + 4.0
225 + 8.0
500 + 20
[16]
± A/°C
50 p
300 p
3 n
50 n
500 n
10 μ