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 k
Ω
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 M
Ω
in parallel with 150 pF
DC Accuracy
(DC Coupled)
[13]
Add ±(50 ppm R 50 ppm Range + 20
µ
V)
Ratio Accuracy
Range to Range
±(Net Front Input Ac 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 R 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)
