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Additional Low Frequency Errors
Error is stated as % of reading.
Frequency
3HZ (slow)
AC Filter
20HZ (medium)
200HZ (fast)
10 - 20 Hz
0
0.25
-
20- 40 Hz
0
0.02
-
40 100 Hz
0
0.01
0.55
100 - 200 Hz
0
0
0.2
200 Hz -1 kHz
0
0
0.02
> 1 kHz
0
0
0
Frequency
Gate Times
.......
..
......................................
Programmable to 1 s. 100 ms. and 10 ms
Measurement Method
...........................................
Flexible counting technique. AC-coupled input using the ac voltage
measurement function.
Settling Considerations
.....
............. ....................... When measuring frequency or period after a dc offset voltage change.
errors may occur. For the most accurate measurement. wait up to
1 second for the input blocking capacitor to settle.
Measurement Considerations
................................
To minimize measurement errors. shield inputs from external noise
when measuring low-voltage. low-frequency signals.
404014050 Accuracy
•
Accuracy is given as
±
%
measurement
Range
Frequency
24 Hour
(23 ±1 ·C)
90 Days
(23 ±5 ·C)
1 Year
(23 ±5 ·C)
Temperature
Coefficientl ·C
Outside 18 to 28·C
100 mV to
3 -5 Hz
0.1
0.1
0.1
0.005
10001}'112J
5 - 10 Hz
0.05
0.05
0.05
0.005
10-40Hz
0.03
0.03
0.03
0.001
40 Hz - 300 kHz
0.006
0.01
0.01
0.001
300 kHz
-
1 MHz
0.006
0.01
0.01
0.001
[1)
Input >100 mV. For 10 - 100 mV. multiply percent measurement error by
10.
[2)
Limited to 8
X
10' volt-Hertz
Gate Time
vs.
Resolution
Gate Time
Resolution
0.01
5Y>
0.1
6Y2
1.0
6Y2
Additional Low Frequency Errors
Error stated as percent of measurement for inputs >100 mV. For 10 -100 mV. multiply percent by 10.
Resolution
Frequency
5'1,
6%
4%
0.12
0.12
3 - 5 Hz
0
0
0.17
0.17
5 - 10 Hz
0
10 - 40 Hz
0.2
0.2
0.21
0.06
40 - 100 Hz
0
100 - 300 Hz
0.03
0.21
0
300 Hz -1 kHz
0
0.01
om
> 1 kHz
0
0
0.02
..
.
29
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