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2-6 General Information & Specifications
878595
Personal Daq User’s Manual
At a
measurement duration
of 610 milliseconds, the last two bits are considered unreliable, resulting in a
resolution of 22 bits. At a very fast
measurement duration
(12.5 milliseconds), the nine
most least
significant
bits
are unreliable, resulting in 15 bit accuracy.
Speed vs. Resolution
1
Speed Designation
Measurement
Duration
(per channel)
Maximum
Sample Rate
2
(Samples/sec)
Resolution
2
(Bits RMS)
(-4 V to +4 V range)
Very Slow, 50 / 60 Hz rejection
610 ms
1.6 / sec
22
Slow, 50 Hz rejection
370 ms
2.7 / sec
22
Slow, 60 Hz rejection
310 ms
3.2 / sec
22
Medium, 50 Hz rejection
130 ms
7.7
/ sec
21
Medium, 60 Hz rejection
110 ms
9.2 / sec
21
Medium
40 ms
25 / sec
19
Fast
20 ms
48 / sec
17
Very Fast
12.5 ms
80 / sec
15
Notes:
1. Each channel can have independent measurement duration and resolution.
2. The sample rates and resolutions shown were obtained with a 10-channel scan and with
continuous self-calibration disabled.
3. Duration does not include the use of CJC measurements.
Note:
When measuring variable input signals (as opposed to relatively steady input signals), the variable
signals will require more samples/sec to obtain a realistic signal representation. Available sample
rates range from 1.6 samples per second up to 80 samples per second as indicated in the preceding
table.
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