Campbell Scientific HFP01SC Hukseflux Self-Calibrating Soil Heat Flux Plate - Manual (Page 17)

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