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Campbell HFP01SC Instruction Manual

Other manuals for HFP01SC: Instruction Manual
Manual is about: Self-Calibrating Soil Heat Flux Plate

Summary of HFP01SC

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    Model hfp01sc self-calibrating soil heat flux plate instruction manual 4/02 copyright (c) 2002 campbell scientific, inc..

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  • Page 3: Warranty and Assistance

    Warranty and assistance the model hfp01sc self-calibrating soil heat flux plate is warranted by campbell scientific, inc. To be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warra...

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  • Page 5: Hfp01Sc Table of Contents

    I hfp01sc table of contents 1. General description....................................................1 2. Sensor specifications ................................................1 3. Installation...................................................................2 4. Wiring ..............................

  • Page 7: Model Hfp01Sc

    1 model hfp01sc self-calibrating soil heat flux plate 1. General description the hfp01sc soil heat flux plate consists of a thermopile and a film heater. The thermopile measures temperature gradients across the plate. During the in- situ field calibration, the film heater is used to generate a heat ...

  • Page 8: 3.  Installation

    Model hfp01sc self-calibrating soil heat flux plate 2 2 cm 6 cm 8 cm ground surface up to 1 m 2.5 cm figure 1. Placement of heat flux plates 3. Installation the hfp01sc soil heat flux plates, the tcav averaging soil temperature probes, and the cs616 water content reflectometer are installed as shown...

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    Model hfp01sc self-calibrating soil heat flux plate 3 in order for the hfp01sc to make quality soil heat flux measurements, the plate must be in full contact with the soil. Never run the sensors leads directly to the surface. Rather, bury the sensor leads a short distance back from the hole to minim...

  • Page 10: 4.  Wiring

    Model hfp01sc self-calibrating soil heat flux plate 4 table 2. Datalogger connections for a differential measurement description color cr10(x) cr23x & cr5000 sensor signal white differential input (h) differential input (h) sensor signal reference green differential input (l) differential input (l) ...

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    Model hfp01sc self-calibrating soil heat flux plate 5 table 3. Wiring for example 1 description color cr10(x) sensor signal white 1h sensor signal reference green ag shield clear g heater resistor signal yellow 1l heater resistor signal reference purple ag shield clear g power red sw12 power referen...

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    Model hfp01sc self-calibrating soil heat flux plate 6 ;factory calibration in w/(m^2 mv) = 1000/sensitivity. ; 4: z=f (p30) 1: 1 f ; 2: 0 exponent of 10 3: 3 z loc [ cal ] 5: end (p95) ;use data from the larger measurement range. ; 6: if (xf) (p89) 1: 2 x loc [ shf_mv ] 2: 4 3: -99990 f 4: 30 then d...

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    Model hfp01sc self-calibrating soil heat flux plate 7 16: sample (p70) 1: 1 reps 2: 3 loc [ cal ] ;add other processing here. ;call calibration routine. ; 17: do (p86) 1: 8 call subroutine 8 *table 2 program 02: 0 execution interval (seconds) *table 3 subroutines ;calibration routine. ; 1: beginning...

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    Model hfp01sc self-calibrating soil heat flux plate 8 ;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:...

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    Model hfp01sc self-calibrating soil heat flux plate 9 19: z=x-y (p35) 1: 9 x loc [ work ] 2: 5 y loc [ mv_180 ] 3: 9 z loc [ work ] 20: z=abs(x) (p43) 1: 9 x loc [ work ] 2: 9 z loc [ work ] 21: z=x/y (p38) 1: 3 x loc [ cal ] 2: 9 y loc [ work ] 3: 3 z loc [ cal ] 22: end (p95) 23: end (p95) end pro...

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    Model hfp01sc self-calibrating soil heat flux plate 10 example 2. Sample cr23x program using a differential measurement instruction ;{cr23x} ; *table 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 ...

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    Model hfp01sc self-calibrating soil heat flux plate 11 ;apply custom calibration to the raw soil heat flux measurement. ; 9: z=x*y (p36) 1: 2 x loc [ shf_mv ] 2: 3 y loc [ cal ] 3: 1 z loc [ shf ] ;output data. ; 10: if time is (p92) 1: 0 minutes (seconds --) into a 2: 20 interval (same units as abo...

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    Model hfp01sc self-calibrating soil heat flux plate 12 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: 49 turn on switched 12v ;used to fil...

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    Model hfp01sc self-calibrating soil heat flux plate 13 13: do (p86) 1: 218 set flag 18 low ;compute in-situ clibration. ; 14: z=x (p31) 1: 2 x loc [ shf_mv ] 2: 6 z loc [ mv_end ] 15: z=x*y (p36) 1: 7 x loc [ v_rf ] 2: 7 y loc [ v_rf ] 3: 3 z loc [ cal ] 16: z=x*f (p37) 1: 3 x loc [ cal ] 2: 128.7 f...

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    Model hfp01sc self-calibrating soil heat flux plate 14 table 5. Wiring for example 3 description color cr5000 sensor signal #1 white 11h sensor signal reference #1 green 11l shield #1 clear sensor signal #2 white 12h sensor signal reference #2 green 12l shield #2 clear sensor signal #3 white 13h sen...

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    Model hfp01sc self-calibrating soil heat flux plate 15 example 3. Sample cr5000 program using a differential measurement instruction 'cr5000 const cal_interval = 180 'hfp01sc calibration interval in minutes. '*** variables *** public shf(4) alias shf(1) = hfp01sc_1 alias shf(2) = hfp01sc_2 alias shf...

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    Model hfp01sc self-calibrating soil heat flux plate 16 if ( iftime (19,cal_interval,min) ) then move (shf_mv_end(1),4,shf_mv_run(1),4) 'compute new calibration. For j = 1 to 4 shf_cal(j) = (v_rf_180(j)*v_rf_180(j)*128.7)/abs (((shf_mv_0(j)+shf_mv_end(j))/2)-shf_mv_180) next j endif 'stop filtering d...

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    Model hfp01sc self-calibrating soil heat flux plate 17 table 6a. Wiring for example 4 description color cr10x a21rel-12 sensor signal #1 white 1h sensor signal #2 white 1l sensor signal #3 white 2h sensor signal #4 white 2l sensor signal #5 white 3h sensor signal #6 white 3l all signal references gr...

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    Model hfp01sc self-calibrating soil heat flux plate 18 example 4. Sample cr10x program using external power and relay ;{cr10x} ; *table 1 program 01: 1 execution interval (seconds) ;measure hfp01sc on smallest range. ; 1: volt (se) (p1) 1: 6 reps 2: 22 7.5 mv 60 hz rejection range 3: 1 se channel 4:...

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    Model hfp01sc self-calibrating soil heat flux plate 19 8: z=f (p30) 1: 1 f ; 2: 0 exponent of 10 3: 17 z loc [ cal_5 ] 9: z=f (p30) 1: 1 f ; 2: 0 exponent of 10 3: 18 z loc [ cal_6 ] 10: end (p95) 11: beginning of loop (p87) 1: 0 delay 2: 6 loop count ;apply custom calibration to raw soil heat flux ...

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    Model hfp01sc self-calibrating soil heat flux plate 20 ;call calibration routine. ; 21: do (p86) 1: 8 call subroutine 8 *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 calibratation. ...

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    Model hfp01sc self-calibrating soil heat flux plate 21 ;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 3: 7 se channel 4: 37 loc [ v_rf_1 ] 5: .001 mult 6: 0 offset 11: b...

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    Model hfp01sc self-calibrating soil heat flux plate 22 22: z=x+y (p33) 1: 19-- x loc [ mv_0_1 ] 2: 31-- y loc [ mv_end_1 ] 3: 43 z loc [ work ] 23: z=x*f (p37) 1: 43 x loc [ work ] 2: .5 f 3: 43 z loc [ work ] 24: z=x-y (p35) 1: 43 x loc [ work ] 2: 25-- y loc [ mv_180_1 ] 3: 43 z loc [ work ] 25: z...

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    Model hfp01sc self-calibrating soil heat flux plate 23 26 mv_180_2 27 mv_180_3 28 mv_180_4 29 mv_180_5 30 mv_180_6 31 mv_end_1 32 mv_end_2 33 mv_end_3 34 mv_end_4 35 mv_end_5 36 mv_end_6 37 v_rf_1 38 v_rf_2 39 v_rf_3 40 v_rf_4 41 v_rf_5 42 v_rf_6 43 work 44 shf_mv_1a 45 shf_mv_2a 46 shf_mv_3a 47 shf...

  • Page 30: 7.  Maintenance

    Model hfp01sc self-calibrating soil heat flux plate 24 the storage term is then given by eq. (3) and the soil heat flux at the surface is given by eq. (4). S t c d t s s = ∆ (3) g g s sfc cm = + 8 (4) 7. Maintenance the hfp01sc requires minimal maintenance. Check the sensor leads monthly for rodent ...

  • Page 31: 9.  References

    Model hfp01sc self-calibrating soil heat flux plate 25 9. References hanks, r. J., and g. L. Ashcroft, 1980: applied soil physics: soil water and temperature application. Springer-verlag, 159 pp. Klute, a., 1986: method of soil analysis. No. 9, part 1, sections 13 and 21, american society of agronom...

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    Model hfp01sc self-calibrating soil heat flux plate 26 this is a blank page..