Smacq Technologies PCI-1255, Руководство пользователя

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2.5 Analog input range setting
Jumper JP1 is for the setting of analog input range, which can be set as 0~10V range or
-5~5V range as shown in Figure 2.5.
2.6 Analog input calibration
A new PCI-1255 DAQ card will be factory-calibrated as 32 channels singled ended input with
0~10V range. It can be deployed right after basic verification. If there is any change on channel
input or range, it must be calibrated once again to make sure the DAQ card can acquire the
correct data.
The analog input correction is divided into two steps: correcting the full scale and correcting
the zero point. The regulator VR1 is used to correct the full scale and VR2 is used to correct the
zero point.
Be aware that in the calibration process, do not touch any conductive parts on the DAQ card
to avoid damaging the card or the computer.
Correction steps
：
1
、
Enter the maximum voltage value of the range you set to any one of the analog input
channels. Adjust the VR1 so that the DAQ card measurements just reach this maximum voltage.
2
、
Connect the analog input channel to the AGND, adjust the VR2 so that the measurement
value on the DAQ card is just 0V.
3
、
Repeat the above two steps a few times to get the best correction result.
2.7 Other settings
Jumper JP3 is for relative settings on 82C54, the timing trigger and external trigger for
  
0~10V
  
-5~5V
Figure 2.5
、
Analog input range setting