Fluke 8508A - Page 22

8508A
Service Manual
1-12
AC Voltage (Secondary Specifications)
[1] [2]
Temperature Coefficient
15 °C - 30 °C
5 °C - 15 °C
30 °C - 40 °C
Range Frequency (Hz)
± ppm Reading/°C
200 mV 1 - 10 5 10
10 - 40 5 10
40 - 100 5 10
100 - 2 k 5 10
2 k - 10 k 12 20
10 k - 30 k 15 20
30 k - 100 k 40 60
2 V 1 - 10 5 10
20 V 10 - 40 5 10
200 V 40 - 100 5 10
100 - 2 k 5 10
2 k - 10 k 10 15
10 k - 30 k 12 20
30 k - 100 k 40 60
100 k - 300 k 60 90
300 k - 1 M 80 120
1000 V 1 - 10 5 10
10 - 40 5 10
40 - 10 k 10 15
10 k - 30 k 12 20
30 k - 100 k 40 60
Type ....................................................................... True rms, AC coupled measures AC component with up to 1000 V DC
bias on any range. DC coupled gives
)dc(ac
22
+
CMRR (1 kΩ unbalance)
[5]
..................................... > 90 dB DC - 60 Hz
Crest Factor
200 mV to 200 V ranges ........................................ 10:1 at 12 % range, 5:1 at 50 % range, 2.5:1 at full range
1000 V range ......................................................... 10:1 at 25 % range, 5:1 at full range
Protection (All ranges)........................................... 1 kV rms
Input Impedance ................................................... 1 MΩ in parallel with 150 pF
DC Accuracy (DC Coupled)................................... Add ±(50 ppm Reading + 50 ppm Range + 20 μV)
Ratio Accuracy
Range to Range...................................................... ±(Net Front Input Accuracy + Net Rear Input Accuracy)
Within Range ......................................................... Apply 24 hour or 20 minute Transfer Uncertainty specifications
Settling Time (to 100 ppm step size)
100 Hz filter............................................................. < 0.5 s
40 Hz filter............................................................... < 1.25 s
10 Hz filter............................................................... < 5 s
1 Hz filter................................................................. < 50 s
Frequency Measurement
Signal Amplitude Range ......................................... 5 % of range to limit set by maximum V
.
Hz
Gate Mode Normal Fast
Resolution......................................................... 6.5 digits 4.5 digits
Frequency Range ............................................. 10 Hz - 1 MHz 200 Hz - 1 MHz
Accuracy (1 year, 13 °C - 33 °C) ..................... ± (10 ppm of Reading + 2 digits) ± 2 digits
Sample Interval................................................. 1 s 50 ms