Campbell HydroSense II Podręcznik Użytkownika Pobierz pdf (Strona 17)

HydroSense II Soil Moisture Measurement System

7 Data Storage and Retrieval

The HydroSense II includes flash-based storage for data and configuration

settings. Being flash based, it is non-volatile and will be preserved when the

batteries are exhausted and changed.

7.1 Storing Data

To store data with the HydroSense II, Press the Store button from the main

screen. This will initiate the process of storing data. If the current location is not

within an existing zone, a new zone will be created, if a zone already exists, the

data will be attributed to that existing zone and it will be stored to flash.

N.B. the store function is intended to store volumetric water content values, so it

is normal to take a measurement before using the Store button.

7.2 What is stored?

The flash file system of the HydroSense II is employed to hold water content

measurements, the zone table and the table of configuration settings.

The most important among these is the water content data file. When the user

chooses to store a measurement by pressing the Store button, the most recent

measurement of volumetric water content (VWC) is stored along with the

measured period, sensor type, current date & time, latitude and longitude (if GPS

synchronisation has been achieved). If the GPS is switched off or does not have

a valid synchronisation, the time and date are still used, however the time and

date may not be accurate. When using the HydroSense II with the GPS disabled,

it is recommended to check and adjust the clock before storing data.

The water content data file is large enough to hold over 1000 data values. When

the file becomes full, the oldest data are overwritten and storage continues.

The zone data file holds a list of zones that have been created. Zones are

automatically created whenever a data point is stored in a new location. Each

zone record contains the centre position (latitude & longitude), radius in metres,

and the zone name. The zone file is large enough to hold over 100 zones,

however when the zone data file is full, new zones can no longer be created.

The configuration settings file is managed automatically by the HydroSense II.

These settings can be synchronised to the computer where they can be viewed,

modified, backed up and restored. For more information, please refer to the

HydroSense II Software User Guide

7.3 Software

The HydroSense II ships with the latest version of the HydroSense II software on

CD. For the latest version, please contact your local agent, or refer to the

Campbell Scientific website.

For a complete guide to the use of this software, please refer to the HydroSense

II Software User Guide.

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Campbell HydroSense II Podręcznik Użytkownika Strona 17