Decagon Devices ECH2O EA-10 Посібник інтегратора - Сторінка 3

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1. Specifications

EA-10 Soil Moisture Sensor Integrator's Guide

1. Introduction

Thank you for using the ECH

O EA-10 Dielectric

Soil Moisture sensor. The EA-10 sensor has a stan-

dard 2-wire, 4-20 mA analog interface for use with

industrial data acquisition and control systems. The

EA-10 has a very low power requirement and high res-

olution. This gives you the ability to make as many

measurements as you want over a long period of time

(i.e. a growing season), with minimal battery usage.

This guide covers the basics of integrating the EA-10

into an existing ECH

O system.

Specifications

Model: ECH

O EA-10 Dielectric Soil Moisture

Sensor.

Electrical specs:

Interface: 4-20 mA, 2-wire analog transmitter

Red: (+) supply; White: (-) supply; Shield: NC

Supply voltage: line powered 7-32 Volt; DC

Overvoltage and reverse polarity protected

Sensor specs:

Measurement type: Volumetric Water Content (VWC)

Measurement range: typical 0 to 40 percent VWC

Measurement resolution: depends on acquisition hardware

Measurement accuracy: ± 2% with soil specific calibra-

tion; accuracy at standard factory calibration varies

depending on soil type