Hello,
I am looking at an existing program, without a full wiring diagram. Would the program included below have 12V power continuously supplied to the HMP35C? Also, what is the difference between the HMP35C and HMP35CF?
Thanks,
- Brendan
Note: In the below program, the HMP temperature is being measured together with the three 107 soil temperatures probes. The logger wiring panel says CR10, but the unit has switched 12V control ports.
;{CR10} <<<---- CR10(x) ?
*Table 1 Program
01: 60.0000 Execution Interval (seconds)
1: Volt (SE) (P1) ;Pyranometer
1: 1 Reps
2: 3 25 mV Slow Range
3: 1 SE Channel
4: 1 Loc [ _________ ]
5: -78.23 Mult
6: 0 Offset
2: Z=X*F (P37) ;solar radiation in MJ/day
1: 1 X Loc [ _________ ]
2: .0864 F
3: 2 Z Loc [ _________ ]
3: Temp (107) (P11) ;Thermistors (3 soil + air temp)
1: 4 Reps
2: 2 SE Channel
3: 1 Excite all reps w/Exchan 1
4: 3 Loc [ _________ ]
5: 1 Mult
6: 0 Offset
4: Internal Temperature (P17)
1: 13 Loc [ _________ ]
5: Excite-Delay (SE) (P4) ;Panel Reference Temperature
1: 1 Reps
2: 4 250 mV Slow Range
3: 11 SE Channel
4: 3 Excite all reps w/Exchan 3
5: 0 Delay (0.01 sec units)
6: 250 mV Excitation
7: 26 Loc [ _________ ]
8: .002 Mult
9: 0 Offset
6: Polynomial (P55)
1: 1 Reps
2: 26 X Loc [ _________ ]
3: 26 F(X) Loc [ _________ ]
4: -74.143 C0
5: 645.21 C1
6: -3835.8 C2
7: 16025 C3
8: -33996 C4
9: 29763 C5
7: Thermocouple Temp (SE) (P13) ;15cm Air Temperature
1: 1 Reps
2: 1 2.5 mV Slow Range
3: 6 SE Channel
4: 2 Type E (Chromel-Constantan)
5: 26 Ref Temp (Deg. C) Loc [ _________ ]
6: 7 Loc [ _________ ]
7: 1 Mult
8: 0 Offset
8: Thermocouple Temp (DIFF) (P14) ; Air Temperature (FWTC)
1: 1 Reps
2: 1 2.5 mV Slow Range
3: 5 DIFF Channel
4: 2 Type E (Chromel-Constantan)
5: 26 Ref Temp (Deg. C) Loc [ _________ ]
6: 25 Loc [ _________ ]
7: 1 Mult
8: 0 Offset
9: Excite-Delay (SE) (P4) ;Relative Humidity (Vaisala)
1: 1 Reps
2: 5 2500 mV Slow Range
3: 7 SE Channel
4: 2 Excite all reps w/Exchan 2
5: 80 Delay (0.01 sec units)
6: 2500 mV Excitation
7: 8 Loc [ _________ ]
8: .1 Mult
9: 0 Offset
<< cut >>
Based on the provided program, it seems that the HMP35C is not directly powered by 12V. Instead, it is likely powered through the data logger's excitation channels. The logger provides the necessary voltage and current to power the sensor and acquire data. While I couldn't find specific details about the differences between HMP35C and HMP35CF without more context, I can make some educated guesses based on common sensor naming conventions:
HMP35C: This might be a general-purpose humidity and temperature sensor.
HMP35CF: The "F" might indicate a specific feature or calibration, such as a factory-calibrated version or one with a specific temperature range.
Can you provide more additional details about your setup?
This post is under review.