Service manual

8508A
Service Manual
1-14
AC Current (Secondary Specifications)
[1] [2] [6] [9]
Temperature Coefficient
15 °C - 30 °C
5 °C - 15 °C
30 °C - 40 °C
Input Impedance (Ω)
Range Frequency (Hz)
± ppm Reading/°C Range Front Rear
1 - 10 10 15
200 μA
150 150
10 - 10 k 10 15 2 mA 15.2 15.2
10 k - 30 k 12 20 20 mA 1.8 1.9
200 μA, 2 mA &
20 mA
30 k - 100 k 40 60
200 mA 1 - 10 10 15 1.2 1.3
10 - 10 k 15 20
10 k - 30 k 15 20
2 A 10 - 2 k 10 15 0.3 0.4
2 k - 10 k 15 20
10 k - 30 k 20 30
20 A 10 - 2 k 20 25 0.04 -
2 k - 10 k 25 30
Type........................................................................ True rms, AC coupled. DC coupled gives
)dc(ac
22
+
Crest Factor........................................................... 3:1 at 50 % range, 1.5:1 at full range
Protection
Front Input............................................................... 20 A rms
Rear Input ............................................................... 2 A rms, Rear Panel Fuse
Settling Time 200 μA to 200 mA Ranges 2 A Range 20 A Range (at 10 A)
to 100 ppm of step to 100 ppm of step to 300 ppm of step
100 Hz filter............................................................. < 0.5 s < 1 s < 1 s
40 Hz filter............................................................... < 1.25 s < 2 s < 2 s
10 Hz filter............................................................... < 5 s < 10 s < 10 s
1 Hz filter................................................................. < 50 s < 50 s < 50 s
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