Fluke 8508A - Page 8

8 Fluke Corporation 8508A Extended Specifications
AC Voltage specifications (cont.)
Type True RMS, AC coupled measures AC component with up to 1000 V DC bias
on any range. DC coupled gives
√(ac
2
+ dc
2
)
CMRR (1 kΩ unbalance)
[5]
>90 dB DC - 60 Hz
Crest Factor
200 mV to 200 V ranges 10:1 at 12 % of range, 5:1 at 50 % of range, 2.5:1 at full range
1000 V range 10:1 at 25 % of 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)
[13]
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 <0.5 s
40 Hz <1.25 s
10 Hz <5 s
1 Hz <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
AC Voltage
(Secondary Specifications)
[1] [2]
Temperature Coefficient
200 mV 1 - 10 5 10
10 - 40 5 10
40 - 100 5 10
100 - 2k 5 10
2k - 10k 12 20
10k - 30k 15 20
30k - 100k 40 60
2 V 1 - 10 5 10
20 V 10 - 40 5 10
200 V 40 - 100 5 10
100 - 2k 5 10
2k - 10k 10 15
10k - 30k 12 20
30k - 100k 40 60
100k - 300k 60 90
300k - 1M 80 120
1000 V 1 - 10 5 10
10 - 40 5 10
40 - 10k 10 15
10k - 30k 12 20
30k - 100k 40 60
Range
± ppm Reading/°C
15 °C - 30 °C
5 °C - 15 °C
30 °C - 40 °C
Frequency
(Hz)