Hello Everyone,
I have a trouble that once I used two IRR-Ps in a fast scan,in order to keep the measurement time shorter than the scan interval,I choose the 250 microsecond integration instead of 20 millisecond integration filters 50 Hz noise.The problem is when I used VX1 and VX2 for excitation,the TmV_1 is much smaller than the TmV_2 and the difference was steady,when I exchange the VX1 and VX2,the difference still exist and steady, but when I used VX2 and VX3 for excitation,the TmV_2 and TmV_3 are quite similar,also when I used VX1 and VX3 for excitation the TmV_1 is much smaller than the TmV_3 too.
As we known ,choosing 20 millisecond integration filters 50 Hz noise can avoid this problem,but I was puzzled when we have to choose 250 microsecond integration,the TmV of IRR-P will present quite different values for VX1 and other VXs.
Here are my programs:
using VX1 and VX2
Therm109 (SBTemp(1),1,1,Vx1,0,250,1.0,0)
VoltDiff (TmV(1),1,mV20,2,True ,0,250,1.0,0)
Therm109 (SBTemp(2),1,5,Vx2,0,250,1.0,0)
VoltDiff (TmV(2),1,mV20,4,True ,0,250,1.0,0)
using VX2 and VX3
Therm109 (SBTemp(2),1,1,Vx2,0,250,1.0,0)
VoltDiff (TmV(2),1,mV20,2,True ,0,250,1.0,0)
Therm109 (SBTemp(3),1,5,Vx3,0,250,1.0,0)
VoltDiff (TmV(3),1,mV20,4,True ,0,250,1.0,0)
using VX1 and VX3
Therm109 (SBTemp(1),1,1,Vx1,0,250,1.0,0)
VoltDiff (TmV(1),1,mV20,2,True ,0,250,1.0,0)
Therm109 (SBTemp(3),1,5,Vx3,0,250,1.0,0)
VoltDiff (TmV(3),1,mV20,4,True ,0,250,1.0,0)
Thanks!
* Last updated by: Oliver on 11/14/2008 @ 3:16 AM *