Campbell Scientific 109SS Temperature Probe - Manual (Page 14)

Model 109SS Temperature Probe
1: AC Half Bridge (P5)
1: 1 Reps
2: 25 2500 mV 60 Hz Rejection Range
3: 1 SE Channel
4: 1 Excite all reps w/Exchan 1
5: 2500 mV Excitation
6: 1 Loc [ V_Vx ]
7: 1 Multiplier
8: 0 Offset
2: Z=1/X (P42)
1: 1 X Loc [ V_Vx ]
2: 2 Z Loc [ Vx_V ]
3: Z=X+F (P34)
1: 2 X Loc [ Vx_V ]
2: -1 F
3: 3 Z Loc [ Vx_V_1 ]
4: Z=X*F (P37)
1: 3 X Loc [ Vx_V_1 ]
2: 24900 F
3: 4 Z Loc [ Rs ]
5: Z=LN(X) (P40)
1: 4 X Loc [ Rs ]
2: 5 Z Loc [ lnRs ]
6: Z=X*F (P37)
1: 5 X Loc [ lnRs ]
2: 0.001 F
3: 6 Z Loc [ Scal_lnRs ]
7: Polynomial (P55)
1: 1 Reps
2: 6 X Loc [ Scal_lnRs ]
3: 7 F(X) Loc [ 1_Tk ]
4: .001129 C0
5: .234108 C1
6: 0 C2
7: 87.7547 C3
8: 0 C4
9: 0 C5
8: Z=1/X (P42)
1: 7 X Loc [ 1_Tk ]
2: 8 Z Loc [ Tk ]
9: Z=X+F (P34)
1: 8 X Loc [ Tk ]
2: -273.15 F
3: 9 Z Loc [ T109_C ]
Variations:
• Temperature reported as °F — add a multiplier 1.8 using the Z=X*F
(P37) instruction, and an offset of 32 using the Z=X+F (P34)
instruction.
• Ac mains noise filtering — see Section 8.3, Electrically Noisy
Environments
• Compensate for long cable lengths — see Section 8.4, Long Cable
Lengths
8