Campbell Scientific HFP01SC HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 17

mV 60 Hz Rejection Range

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Model HFP01SC Self-Calibrating Soil Heat Flux Plate *Table 2 Program 02: 0 Execution Interval (seconds) *Table 3 Subroutines ;Calibration routine. ; 1: Beginning of Subroutine (P85) 1: 8 Subroutine 8 ;Perform in-situ calibration. ; 2: If time is (P92) 1: 1 Minutes (Seconds --) into a 2: 180 Interval (same units as above) 3: 30 Then Do 3: Z=X (P31) 1: 2 X Loc [ shf_mV ] 2: 4 Z Loc [ mV_0 ] ;Begin heating for calibration. ; 4: Do (P86) 1: 48 Set Port 8 High ;Used to filter data during and after calibration. ; 5: Do (P86) 1: 18 Set Flag 8 High 6: End (P95) ;End site calibration three minutes after calibration started. ; 7: If time is (P92) 1: 4 Minutes (Seconds --) into a 2: 180 Interval (same units as above) 3: 30 Then Do ;Measure voltage across current shunt resistor (10 ohm 1% 0.25 W 50 ;ppm/deg C) during calibration. This measurement is used to ;compute power. ; 8: Volt (SE) (P1) 1: 1 Reps 2: 25 2500 mV 60 Hz Rejection Range 3: 2 SE Channel 4: 7 Loc [ V_Rf ] 5: .001 Mult 6: 0 Offset 9: Z=X (P31) 1: 2 X Loc [ shf_mV ] 2: 5 Z Loc [ mV_180 ] ;Turn off the soil heat flux plate heater. ; 10: Do (P86) 1: 58 Set Port 8 Low 11: End (P95) 11

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Model HFP01SC Self-Calibrating Soil Heat Flux Plate
*Table 2 Program
02: 0
Execution Interval (seconds)
*Table 3 Subroutines
;Calibration routine.
;
1:
Beginning of Subroutine (P85)
1: 8
Subroutine 8
;Perform in-situ calibration.
;
2:
If time is (P92)
1: 1
Minutes (Seconds --) into a
2: 180
Interval (same units as above)
3: 30
Then Do
3:
Z=X (P31)
1: 2
X Loc [ shf_mV
]
2: 4
Z Loc [ mV_0
]
;Begin heating for calibration.
;
4:
Do (P86)
1: 48
Set Port 8 High
;Used to filter data during and after calibration.
;
5:
Do (P86)
1: 18
Set Flag 8 High
6:
End (P95)
;End site calibration three minutes after calibration started.
;
7:
If time is (P92)
1: 4
Minutes (Seconds --) into a
2: 180
Interval (same units as above)
3: 30
Then Do
;Measure voltage across current shunt resistor (10 ohm 1% 0.25 W 50
;ppm/deg C) during calibration.
This measurement is used to
;compute power.
;
8:
Volt (SE) (P1)
1: 1
Reps
2: 25
2500 mV 60 Hz Rejection Range
3: 2
SE Channel
4: 7
Loc [ V_Rf
]
5: .001
Mult
6: 0
Offset
9:
Z=X (P31)
1: 2
X Loc [ shf_mV
]
2: 5
Z Loc [ mV_180
]
;Turn off the soil heat flux plate heater.
;
10:
Do (P86)
1: 58
Set Port 8 Low
11:
End (P95)
11