Campbell Met One 034A-L Instrukcja Operatora Pobierz pdf (Strona 47)

Manual

Annexes

Annex 3.1: METSTAT Structure Diagram

Structure Diagram for METSTAT, a Datalogger Program for the Meteorological Stations established by GCP/RAF/304/

JPN and GCP/INT/752/ITA Projects Using Campbell Scientific CR10X Storage and Control Modules.

Interval = 1440 minutes (1day)

Interval = 60 minutes (1 hour)

Interval = 300 seconds (5 minutes)

Switch on CS500

“combined sensors for air temperature and RH”

Delay 0.02 seconds

“to allow the CS500 to heat up”

Measure

inp 1 AIR_T EMP [°C]

inp 2 RH [%]

Switch off CS500

“to save power”

Measure

inp 3 SOLAR -RAD [W/M^2]

inp 4 WIND_SPD [M/S]

inp 5 WIND_DIR [degrees]

inp 6 RAIN [MM]

Process

IF RH>100

T F

RH = 100 RH = RH

inp 7 SVP (AIR_TEMP)

“saturated vapor pressure as

function of air temperature [kPa]”

inp 8 VP = RH/100 * SVP “

vapor pressure [kPa]”

inp 9 VPD = SVP - VP

“ vapor pressure deficit [kPa]”

“vapor pressure deficit is used in Penman based potential evaporation

estimation”

IF SOLAR_RAD < 0

T F

SOLAR_RAD = 0 SOLAR_RAD = SOLAR_RAD

“net. solar radiation is input in the Penman and Priestley-Taylor

based potential evaporation estimation”

inp 10 FM_SOLAR = 300 * SOLAR_RAD

“[J/m2,  for 5 min]”

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Campbell Met One 034A-L Instrukcja Operatora Strona 47