I-8014W API User Manual, v1.0.1, June 2011
Copyright © 2011 ICP DAS Co., Ltd. All Rights Reserved. E-mail: [email protected]
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Case Example
The case requires:
1. Measuring 4 differential signals ranged from -10 V to 10V.
2. The sampling rate per channel is 200 Hz, and sampling time interval from one
channel to the next channel is less than 10
μs.
3. When 2000 samples of data collected every time, transfer the data through
Ethernet to data center or a remote data storage disk.
To meet the requirements:
Step1
. Set the jumper on I-8014W as differential input mode.
Step2
. Set input channel as ch0 ~ ch3, and input range of each channel as -10 ~ 10 V.
(Gain = 0)
Step3
. Set sampling rate as 200, and scan mode as mode2: virtual sample and hold
mode. (With virtual sample and hold mode, and sampling time interval
between one channel to another channel is 4
μ
s.)
Step4
. Collecting 2000 samples means collecting 500 samples per channel. (2000
divided by four channels) It needs 500 * (1/ 200 Hz) = 2500 ms.
Step5
. If the system uses MiniOS7 platform, both converting data from hexadecimal
to floating and transferring data through Ethernet add CPU load. It is
recommended to transfer the hexadecimal data to PC client and then convert
them to floating data on PC.
