Electrical Measurement Specifications - Fluke 8508A User Manual

Electrical Measurement Specifications

Fluke guarantees 8508A performance verification using specifications stated to 99 % confidence
level.
DC Voltage
Range Full Scale
95 % Confidence Level
200 mV 199.990 000
2 V 1.999 900 00
20 V 19.999 000 0
200 V 199.990 000
1000 V 1050.000 00
99 % Confidence Level
200 mV 199.990 000
2 V 1.999 900 00
20 V 19.999 000 0
200 V 199.990 000
1000 V 1050.000 00
Range
200 mV
2 V
20 V
200 V
1000 V
Type ....................................................................... Multi-slope, multi-cycle A-D Converter
[5]
CMRR (1 kΩ unbalance) .................................... 140 dB at DC and 1 - 60 Hz
[5]
NMRR
Filter Out ................................................................. 60 dB at 50/60 Hz ±0.09 %
Filter In .................................................................... 110 dB at 50/60 Hz ±0.09 %
Protection (All ranges) ........................................... 1 kV rms
Input Impedance
200 mV to 20 V Ranges .......................................... > 10 GΩ
200 V & 1000 V Ranges ......................................... 10.1 MΩ ± 1 %
Max Input Current ................................................. 50 pA
Ratio Accuracy
Range to Range...................................................... Apply an RSS summation of Net Front Input Accuracy and Net Rear
Within Range .......................................................... Using the 24 hour or 20 minute Transfer Uncertainty specifications
Settling Time (to 10 ppm step size)
Filter Out ................................................................. < 50 ms
Filter In .................................................................... < 1 s
Note
DC Voltage
Uncertainty Relative to Cal Stds
[15]
24 hour 90 day
TCal ±1 °C TCal ±1 °C
0.7 + 0.5 1.4 + 0.5
0.5 + 0.2 1.4 + 0.2
0.5 + 0.2 1.4 + 0.2
1.0 + 0.2 2.6 + 0.2
1.0 + 0.5 2.6 + 0.5
0.8 + 0.6 2.0 + 0.6
0.6 + 0.25 1.8 + 0.25
0.6 + 0.25 1.8 + 0.25
1.2 + 0.25 3.5 + 0.25
1.2 + 0.6 3.5 + 0.6
DC Voltage (Secondary Specifications)
Transfer Uncertainty
20 mins ±1 °C ± (ppm
Reading+ ppm Range)
0.4 + 0.3
0.12 + 0.1
0.12 + 0.1
0.4 + 0.1
0.4 + 0.3
Input Accuracy
as appropriate, apply an RSS summation of specified accuracy of the
Front Input signal and the specified accuracy of the Rear Input signal
Electrical Measurement Specifications
[1] [2] [3]
± (ppm Reading + ppm Range)
365 day
TCal ±1 °C TCal ±1 °C
2.7 + 0.5 4.5 + 0.5
2.7 + 0.2 3.0 + 0.2
2.7 + 0.2 3.0 + 0.2
4.0 + 0.2 4.5 + 0.2
4.0 + 0.5 4.5 + 0.5
3.5 + 0.6 6.0 + 0.6
3.5 + 0.25 4.0 + 0.25
3.5 + 0.25 4.0 + 0.25
5.2 + 0.25 6.0 + 0.25
5.2 + 0.6 6.0 + 0.6
[1] [2] [3]
Temperature Coefficient
5 °C - 15 °C
15 °C - 30 °C
30 °C - 40 °C
± ppm Reading/°C
0.4 0.6
0.3 0.5
0.3 0.5
0.7 1.0
0.7 1.0
[17]
Specifications
Absolute Uncertainties
[4]
365 day 365 day TCal
±5 °C
5.0 + 0.5
3.5 + 0.2
3.5 + 0.2
5.5 + 0.2
5.5 + 0.5
6.5 + 0.6
4.5 + 0.25
4.5 + 0.25
7.0 + 0.25
7.0 + 0.6
[16]
5 °C - 40 °C
± V/°C
100 n
200 n
1 μ
20 μ
100 μ
[17]
5
5-5