ICP DAS USA PIO-DA4, User Manual

Page: 22 / 70

Consequently, the software can be used to calibrate the analog output without
the need for any hardware Trim-pot adjustment. For example,
Channel n MinV[n] MaxV[n] MinI[n] MaxI[n]
0 134 16297 8180 15943
1 137 16293 8172 15976
2 132 16296 8199 15949
3 134 16391 8177 15963
4 135 16298 8165 15955
5 131 16292 8150 15947
6 136 16295 8172 15968
7 134 16297 8163 15961
8 134 16294 8188 15959
9 132 16295 8169 15948
10 135 16298 8172 15946
11 133 16296 8177 15975
12 131 16292 8159 15942
13 134 16297 8173 15973
14 132 16293 8168 15949
15 133 16295 8175 15965
If the user wants to send Vout(volts) to Channel n, the calibrated hex value,
DaValue, sent to D/A converter can be calculated in the following way:
DeltaV[n]=20.0/(MaxV[n]–MinV[n]);
/* DeltaV[n]=volts per count at channel_n */
DaValue=(Vout+10.0)/DeltaV[n]+MinV[n];
/* DaValue=Hex value to send to the D/A */
pio_da16_da(n,DaValue);
/* send the DaValue to Channel n */
If the user wants to send Iout(mA) to Channel n, the calibrated hex value,
DaValue, sent to the D/A converter can be calculated in the following way:
(Refer to DEMO9.C)
DeltaI[n]=20.0/(MaxI[n]–MinI[n]);
/* DeltaI[n]=mA per count at channel_n */
DaValue=Iout/DeltaI[n]+MinI[n];
/* DaValue=Hex value send to D/A */
pio_da16_da(n,DaValue);
/* send the DaValue to Channel n */
Refer to DEMO7.C and DEMO9.C for more information.
PIO-DA/PISO-DA Series User Manual (Ver.2.9, Feb. 2011, PMH-009-29 )
22