Measurement-computing Personal Daq rev.6.0 Manuel d'utilisateur télécharger pdf (Page 26)

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

Speed Designation

Measurement

Duration

(per channel)

Maximum

Sample Rate

(Samples/sec)

Resolution

(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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Measurement-computing Personal Daq rev.6.0 Manuel d'utilisateur Page 26