Campbell 229 Manuel d'utilisateur télécharger pdf

COMPONENTS

229, CE4, and CE8

Water Matric Potential Sensor and Current Excitation Modules

Reliable Water

Measurements

No maintenance required

Overview

Campbell Scientic’s 229 Water Matric Potential Sensor measures

soil water potential from -10 to -2500 kPa. The sensor must be con-

nected to either a CE4 or CE8 current excitation module. A Camp-

bell Scientic datalogger controls the current excitation module,

measures the probe, and calculates soil water matric potential.

www.campbellsci.com/229-l

Benets and Features

Compatible with most Campbell Scientic dataloggers

Measures a wide range of matric potential

Measurements not aected by salts in the soil

Long lasting, with no maintenance required

Compatible with AM16/32-series multiplexers allowing

measurement of multiple sensors

questions & quotes: 435.227.9000

229 Measurement Details

The 229 Water Matric Potential Sensor consists of a heating

element and thermocouple placed in epoxy in a hypodermic

needle, which is encased in a porous ceramic matrix.

To calculate soil water matric potential, a CE4 or CE8 current

excitation module applies a 50 mA current to the 229’s heating

element, and the 229’s thermocouple measures the temperature

rise. The magnitude of the temperature rise varies according

to the amount of water in the porous ceramic matrix, which

changes as the surrounding soil wets and dries. Soil water matric

potential is determined by applying a second-order polyno-

mial equation to the temperature rise. Users must individually

calibrate each of their 229 sensors in the soil type in which the

sensors will reside.

A reference temperature measurement is required for the 229’s

thermocouple measurement. Options for measuring the refer-

ence temperature include:

Thermistor built into the CR800, CR850, CR1000, CR3000, or

CR5000 wiring panel

PRT built into the wiring panel of the CR9050 or CR9051E input

module for the CR9000X Measurement and Control System

e 229 is not compatible with our CR200(X)-series or CR510 dataloggers.

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Résumé du contenu

Page 1 - Measurements

COMPONENTS229, CE4, and CE8Water Matric Potential Sensor and Current Excitation ModulesReliable Water MeasurementsNo maintenance requiredOverviewCampb

Page 2 - Specications

Campbell Scientic, Inc. | 815 W 1800 N | Logan, UT 84321-1784 | (435) 227-9000 | www.campbellsci.comUSA | AUSTRALIA | BRA

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Campbell 229 Spécifications (34 pages)

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Campbell 229 Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Mesure, test et contrôle Campbell 229. 229, CE4, and CE8 - Campbell Scientific Manuel d'utilisatio

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