Hello,
In advance sorry for my English.
I have a cr1000 and a am16/32b. I would like to connect a cnr4.temperature with the pt100with a 4wpb100.
Could you give me the right wiring with 4wpb100. I use the diff channels 5 (4wpb100) and 6 of the am16/32 to measure the temperature and the channel 1 and 2 of the cr1000.
For me the wiring is
grey : channel l of 4wpb100, 5 l of the mux
brown : channel ground 4wpb100 ground of the mux
green : 6h of mux
yellow : 6l of the mux
But with this wiring the t°is not right. the result cnr4_t_c is -240.01°C or the right T° is about 18°c.
What is the problem?
Thank you very much for your help !
The code is :
Sub cnr4
'RealTime(rTime)
nbre_appel=nbre_appel+1
Scan(1,sec,1,1)
'mesure pour le cnr4
'load the multiplier values for the cnr4
cnr4_mult(1)=pyranometer_up_mult
cnr4_mult(2)=pyranometer_dn_mult
cnr4_mult(3)=pyrgeometer_up_mult
cnr4_mult(4)=pyrgeometer_dn_mult
PortSet (4,1) 'activation du mux1
PulsePort (5,10000) 'impulsion du mux 1 par le port2
VoltDiff (long_dn,1,AutorangeC,1,True ,0,250,1.0,0)
VoltDiff (Long_up,1,AutorangeC,2,True ,0,250,1.0,0)
PulsePort (5,10000)
VoltDiff (short_dn,1,AutorangeC,1,True ,0,250,1.0,0)
VoltDiff (short_up,1,AutorangeC,2,True ,0,250,1.0,0)
PulsePort (5,1000)
BrHalf4W (cnr4_RS_R0,1,mV5000,mV5000,1,Vx1,1,2500,True,True,0,250,1.0,0)
PRT (cnr4_t_c,1,cnr4_RS_R0,1.0,0)
PortSet (4,0)