The ±5 ppm per °C temperature coefficient of the fixed resistors was chosen
because the ±0.01% accuracy tolerance would hold over the desired temperature
range.
Figure 65. PT100 in Four-Wire Full-Bridge
CRBasic Example 52. PT100 in Four-Wire Full-Bridge
'This program example demonstrates the measurement of a 100-ohm four-wire full bridge. See
'FIGURE. PT100 in Four-Wire Full-Bridge
(p. 244) for wiring diagram.
Public BrFullOut
Public Rs_Ro
Public Deg_C
BeginProg
Scan(1,Sec,0,0)
'BrFull(Dst,Reps,Range,DfChan,Vx1,MPS,Ex,RevEx,RevDf,Settle,Integ,Mult,Offset)
BrFull(BrFullOut,1,mV25,1,Vx1,1,2500,True,True,0,250,.001,.02344)
'BrTrans = Rf*(X/(1-X))
Rs_Ro = 50 * (BrFullOut/(1 - BrFullOut))
'PRTCalc(Destination,Reps,Source,PRTType,Mult,Offset)
PRTCalc(Deg_C,1,Rs_Ro,2,1.0,0)
NextScan
7.9.16 PLC Control — Details
Related Topics:
• PLC Control — Overview (p. 74)
• PLC Control — Details (p. 244)
• PLC Control Modules — Overview (p. 368)
• PLC Control Modules — Lists (p. 648)
• PLC Control — Instructions (p. 562)
• Switched Voltage Output — Specifications
• Switched Voltage Output — Overview
• Switched Voltage Output — Details
(p. 103)
244
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