Campbell Scientific HFP01SC HFP01SC Hukseflux Self-Calibrating Soil Heat Flux
Campbell Scientific HFP01SC Manual
View all Campbell Scientific HFP01SC manuals
Add to My Manuals
Save this manual to your list of manuals |
Campbell Scientific HFP01SC manual content summary:
- Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 1
INSTRUCTION MANUAL Model HFP01SC Self-Calibrating Soil Heat Flux Plate Revision: 3/14 Copyright © 2002-2014 Campbell Scientific, Inc. - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 2
- Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 3
BY CAMPBELL SCIENTIFIC, INC. are warranted by Campbell Scientific, Inc. ("Campbell") to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless otherwise specified in the corresponding Campbell pricelist or product manual - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 4
problem, an RMA number will be issued. Please write this number clearly on the outside of the shipping container. Campbell Scientific's shipping address is: CAMPBELL SCIENTIFIC customer at the customer's expense. Campbell Scientific reserves the right to refuse service on products that were exposed - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 5
a Differential Measurement 5 6-3. Wiring for Example 1 6 6-4. Wiring for Example 2 9 6-5. Wiring for Example 3 13 6-6. Sensor Wiring for Example 4 17 6-7. Datalogger-to-A21REL-12 Wiring for Example 4 17 6-8. Hukseflux and Campbell Scientific Variable Names 24 i - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 6
Table of Contents ii - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 7
damage to the cable is suspected, consult with a Campbell Scientific applications engineer. • Although the HFP01SC is rugged, it should be handled as a precision scientific instrument. 3. Initial Inspection • Upon receipt of the HFP01SC, inspect the packaging and contents for damage. File damage - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 8
input cable. Two analog inputs are required to measure the HFP01SC-L. This manual refers to the sensor as the HFP01SC. The sensor's cable can terminate in: • Pigtails that connect directly to a Campbell Scientific datalogger (option -PT). • Connector that attaches to a prewired enclosure (option - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 9
(nominal): 100 Ω Duration of Calibration: ±3 min. @ 1.5 W; typically done every 3 to 6 hours Weight without Cable: 200 g (7.05 oz) 6. Installation 6.1 Placement in Soil The HFP01SC soil heat flux plates, the TCAV averaging soil temperature probes, and the CS616, Water Content Reflectometer, are - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 10
hole. Insert the heat flux plate into the horizontal cut. Install the HFP01SC in the soil such that the side with the text "this side up" is facing the sky. CAUTION In order for the HFP01SC to make quality soil heat flux measurements, the plate must be in full - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 11
Model HFP01SC Self-Calibrating Soil Heat Flux Plate TABLE 6-1. Datalogger Connections for a Single-Ended Measurement Description Sensor Signal Sensor Signal Reference Shield Color White Green CR10X Single- - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 12
Soil Heat Flux Plate 6.2 Wiring Connections to Campbell Scientific dataloggers are given in FIGURE 6-1, TABLE 6-1, and TABLE 6-2. The output of the HFP01SC can be measured using a single-ended analog measurement (VoltSE() or Instruction 1), however, a differential analog measurement (VoltDiff() or - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 13
. Const CAL_INTERVAL = 1440 'HFP01SC insitu calibration interval (minutes). Const END_CAL = OUTPUT_INTERVAL-1 'End HFP01SC insitu calibration one minute before (mean,TRUE,100) DataInterval (0,OUTPUT_INTERVAL,Min,10) Average (4,shf(1),IEEE4,shf_cal_on_f) Sample (4,shf_cal(1),IEEE4) EndTable 7 - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 14
(1),4) Move (V_Rf_180(1),4,V_Rf(1),4) sw12_1_state = FALSE EndIf If ( IfTime (END_CAL,CAL_INTERVAL,Min) ) Then Move (shf_mV_end(1),4,shf_mV(1),4) 'Compute new HFP01SC calibration factors. For ii = 1 To 4 shf_cal(ii) = V_Rf_180(ii)*V_Rf_180(ii)*128.7/ABS (((shf_mV_0(ii)+shf_mV_end(ii))/2)-shf_mV_180 - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 15
Model HFP01SC Self-Calibrating Soil Heat Flux Plate 6.3.2 Example 2. Sample CR10(X) Program Using a Single-Ended Measurement Instruction TABLE 6-4 provides the wiring for Example 2. TABLE 6-4. Wiring for Example 2 Description Sensor Signal Sensor Signal Reference Shield Color White Green Clear - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 16
Model HFP01SC Self-Calibrating Soil Heat Flux Plate ;Factory calibration in W/(m^2 mV) = 1000/sensitivity. ; 4: Z=F (P30) 1: 1 F ; - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 17
Model HFP01SC Self-Calibrating Soil Heat Flux Plate *Table 2 Program 02: 0 Execution Interval ( 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 - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 18
Model HFP01SC Self-Calibrating Soil Heat Flux Plate ;Stop filtering data. ; 12: If time is (P92) 1: 39 Minutes (Seconds --) into a 2: 180 Interval (same units as above) 3: 30 - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 19
HFP01SC Self-Calibrating Soil Heat Flux Plate 6.3.3 Example 3. Sample CR23X Program Using a Differential Measurement Instruction 1 Program 01: 1 Execution Interval (seconds) ;Measure HFP01SC on smaller range. ; 1: Volt (Diff) (P2) 1: 1 Reps 2: 21 10 mV, 60 Hz Reject, Slow Range 3: 9 DIFF - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 20
Model HFP01SC Self-Calibrating Soil Heat Flux Plate ;Factory calibration in W/(m^2 mV) = 1000/sensitivity. ; 4: Z=F (P30) 1: 1 F ; - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 21
Model HFP01SC Self-Calibrating Soil Heat Flux Plate *Table 2 Program 02: 0 Execution Interval (seconds) 2 X Loc [ shf_mV ] 2: 5 Z Loc [ mV_180 ] ;Turn off the soil heat flux plate heater. ; 10: Do (P86) 1: 59 Turn Off Switched 12V 11: End (P95) ;Stop filtering data. ; 12: If time is - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 22
Model HFP01SC Self-Calibrating Soil Heat Flux Plate 13: Do (P86) 1: 218 Set Flag 18 Low ;Compute in-situ calibration. ; 14: Z=X (P31) 1: 2 X Loc [ shf_mV ] 2: 6 Z Loc [ mV_end ] 15: Z=X*Y ( - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 23
Model HFP01SC Self-Calibrating Soil Heat Flux Plate 6.3.4 Example 4. Sample CR10X Program Using External Power and Relay TABLE 6-6 provides the sensor wiring for Example 4, and TABLE 6-7 provides - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 24
3: 1 SE Channel 4: 7 Loc [ shf_mV_1 ] 5: 1 Mult 6: 0 Offset ;Measure HFP01SC on larger range. ; 2: Volt (SE) (P1) 1: 6 Reps 2: 23 25 mV for plate 1 here. 2: 0 Exponent of 10 3: 13 Z Loc [ cal_1 ] 5: Z=F (P30) 1: 1 2: 0 3: 14 F Exponent of 10 Z Loc [ cal_2 ; - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 25
Model HFP01SC Self-Calibrating Soil Heat Flux Plate 11: Beginning of Loop (P87) 1: 0 Delay 2: 6 If time is (P92) 1: 0 Minutes (Seconds --) into a 2: 20 Interval (same units as above) 3: 10 Set Output Flag High (Flag 0) 18: Real Time (P77)^25251 1: 0110 Day,Hour/Minute (midnight = 0000) - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 26
Model HFP01SC Self-Calibrating Soil Heat Flux Plate *Table 3 Subroutines ;Calibration routine. ; 1: Beginning Measure voltage across current shunt resistor during calibration. ;This measurement is used to compute power. ; 10: Volt (SE) (P1) 1: 6 Reps 2: 25 2500 mV 60 Hz Rejection Range - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 27
Model HFP01SC Self-Calibrating Soil Heat Flux Plate 15: End (P95) ;Compute in-situ calibration. ; 16: If time is (P92) 1: 39 Minutes (Seconds --) into a 2: 180 Interval (same - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 28
Model HFP01SC Self-Calibrating Soil Heat Flux Plate 5 shf_5 0 0 0 6 shf_6 0 0 0 7 shf_mV_1 1 5 2 8 shf_mV_2 1 0 1 9 shf_mV_3 1 0 1 10 shf_mV_4 1 0 1 11 shf_mV_5 1 0 1 12 shf_mV_6 1 0 1 13 cal_1 5 5 3 14 cal_2 9 0 1 15 cal_3 9 0 1 16 cal_4 9 0 1 17 cal_5 9 0 1 18 cal_6 9 0 1 19 - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 29
Model HFP01SC Self-Calibrating Soil Heat Flux Plate θm = ρw ρb θv (2) where CS is the heat section of the Hukseflux manual or visit the application section of the Hukseflux web site at www.hukseflux.com/downloads/thermalScience/applicAndSpec.pdf. Equation 6 in the Hukseflux manual is used to - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 30
of Sensor after calibration and just before output Voltage Across fixed 10 Ω resistor Hukseflux ϕ Vsen 1/Esen2 V (0) V (180) V (360) Vcur Campbell Scientific shf shf_mV cal mV_0 mV_180 mV_end V_Rf 7. Maintenance The HFP01SC requires minimal maintenance. Check the sensor leads monthly for rodent - Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 31
- Campbell Scientific HFP01SC | HFP01SC Hukseflux Self-Calibrating Soil Heat Flux - Page 32
Centro Caribe S.A. (CSCC) 300 N Cementerio, Edificio Breller Santo Domingo, Heredia 40305 COSTA RICA www.campbellsci.cc • [email protected] Campbell Scientific Ltd. (CSL) Campbell Park 80 Hathern Road Shepshed, Loughborough LE12 9GX UNITED KINGDOM www.campbellsci.co.uk • [email protected]
INSTRUCTION MANUAL
Model HFP01SC Self-Calibrating
Soil Heat Flux Plate
Revision: 3/14
Copyright © 2002-2014
Campbell Scientific, Inc.