Campbell Scientific HMP35C Temperature and RH Sensor - Manual (Page 12)

HMP35C TEMPERATURE AND RH PROBE
10
TABLE 9. Wiring for Example 4
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 4. Sample CR10(X) Program that Computes Vapor Pressure
and Saturation Vapor Pressure
;Measure the HMP35C temperature.
;
01:
Temp (107) (P11)
1: 1
Reps
2: 3 SE Channel ;Orange wire (SE 3), White wire (AG)
3: 1 Excite all reps w/E1 ;Black wire (EX 1)
4: 1 Loc [ T_C ]
5: 1 Mult ;See Table 4 for alternate multipliers
6: 0 Offset ;See Table 4 for alternate offsets
;Turn the HMP35C on.
;
02:
Do (P86)
1: 41
Set Port 1 High ;Yellow wire (C1)
;Pause 150 milliseconds, before making the measurement, so the
;probe can stabilize on the true relative humidity.
;
03:
Excitation with Delay (P22)
1: 1
Ex Channel
2: 0 Delay W/Ex (units = 0.01 sec)
3: 15 Delay After Ex (units = 0.01 sec)
4: 0 mV Excitation
;Measure the HMP35C relative humidity.
;
04:
Volt (SE) (P1)
1: 1
Reps
2: 5 2500 mV Slow Range ;CR500 (2500 mV); CR23X (1000 mV); 21X, CR7 (5000 mV)
3: 4 SE Channel ;Green wire (SE 4), Purple wire (AG)
4: 2 Loc [ RH_frac ]
5: 0.001 Mult ;See Table 5 for alternate multipliers
6: 0 Offset
;Turn the HMP35C off.
;
05:
Do (P86)
1: 51
Set Port 1 Low ;Yellow wire (C1)