HMP35C TEMPERATURE AND RH PROBE
8
TABLE 8. Wiring for Example 3
Description
Color
CR10(X)
Temperature
Orange
SE 3 (2H)
Relative Humidity
Green
SE 4 (2L)
Temperature Signal Reference
White
AG
Temperature Excitation
Black
E1
Power Control
Yellow
C1
Power
Red
12 V
RH Signal, Power, & Control Reference
Purple
AG
Shield
Clear
G
Example 3. CR10(X) Program that Measures the HMP35C
in an Electrically Noisy Environment
;Measure the HMP35C thermistor.
;
01:
AC Half Bridge (P5)
1:
1
Reps
2:
22
7.5 mV 60 Hz Rejection Range
;CR500 (7.5 mV); CR23X (10 mV)
;21X, CR7 (15 mV)
3:
3
SE Channel
;Orange wire (SE 3), White wire (AG)
4:
1
Excite all reps w/Ex 1
;Black wire (EX 1)
5: 2000
mV Excitation
;CR500, CR23X (2000 mV); 21X, CR7 (4000 mV)
6:
1
Loc [ T_C ]
7:
800
Mult
8:
0
Offset
;Compute the temperature in degrees Celsius.
;
02:
Polynomial (P55)
1:
1
Reps
2:
1
X Loc [ T_C ]
3:
1
F(X) Loc [ T_C ]
4:
-53.46
C0
5:
90.807 C1
6:
-83.257 C2
7:
52.283 C3
8:
-16.723 C4
9:
2.211 C5
;Apply the temperature multiplier.
;
03:
Z=X*F (P37)
1:
1
X Loc [ T_C ]
2:
1
F
;See Table 4 for alternate multipliers
3:
1
Z Loc [ T_C ]
;Apply the temperature offset.
;
04:
Z=X+F (P34)
1:
1
X Loc [ T_C ]
2:
0
F
;See Table 4 for alternate offsets
3:
1
Z Loc [ T_C ]
Содержание HMP35C
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