Campbell LWS-L Manual do Operador descarregar pdf (Página 35)

Campbell Scientific Model 107–L Temperature Probe

RM72004,0000157 -19-07MAY13-1/1

CZ76372,000072D -19-17OCT14-1/1

RM72004,00001E8 -19-29OCT13-1/1

Theory of Operation

Temperature probe measures air, soil, or water

temperature. For air temperature measurements, mount a

radiation shield to probe to limit solar radiation loading.

The probe can be buried in ground or submerged in water

up to 15 m (50 ft.). Maximum pressure is 145 kPa (21 psi).

Multiple temperature probes can be used at varying

heights to monitor inversion layers for freeze detection

and warnings.

PC15764 —UN—27AUG12

Temperature Probe

PC15767 —UN—28AUG12

Radiation Shield

Specifications

Sensor: BetaTherm 100K6A1B Thermistor

Measurement Range: -35—50 °C (-31—122 °F)

Tolerance: ±0.2 °C over 0—50 °C range (±0.36 °F over

32—122 °F range)

Output: Voltage drop across fixed resistors (1000 Ohm to

249 kOhm fixed resistors) @ 2500 mV excitation voltage

Operating Environment: -35—50 °C (-31—122 °F)

Dimensions: 10.4 cm (4.1 in.) long, 0.762 cm (0.3 in.)

diameter

Cable Length: 6 m (20 ft.)

Connector Type: Molex MX150

Mount Location

For air temperature measurements, locate probe over an

open, level area at least 9 m (30 ft.) in diameter. Ground

that is bare or covered by short grass provides best results.

Locate sensor at a distance of at least four times the

height of any nearby obstruction and at least 30 m (98

ft.) from large, paved areas.

When probe is used for air temperature measurements,

provide adequate ventilation and protection from thermal

radiation. Install probe with radiation shield.

For soil temperature measurements, probe can be

buried in ground. For water temperature measurements,

submerge probe in water.

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Campbell LWS-L Manual do Operador Página 35

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