Specifications

HYDROLOGICAL SERVICES

DL3 100-04 IMP

Issue 2: 15/11/2005

LAN / WAN

PORTABLE PC

Communication

Interface

OR OR

RRDL-3 Logger

Logger returned

Telephone, Radio, Satellite, etc.

Unload at site

River Height

TBRG

(If applicable)

1.Introduction

The Hydrological Services Rain and River Data Logger RRDL-3 has been designed using surface

mount technology to provide a very small, low power and reliable data logger that can be used in

harsh environments for extended periods. Flash memory technologyhas not onlybeen used for data

storage but also for program storage - which provides secure non-volatile data storage as well as

the unique capability of remote software download as new software features and revisions become

available. The logger can be connected to a standard Tipping Bucket Rain Gauge as well as either

a Quadrature River Height Sensor or 4-20mA River Height Pressure Transducer. The

communication features allow for very flexible operation either directly connected to a computer

or through a communication modem (wired, cellular, radio or satellite). The logger can be set up

to dial out to several separate computer networks when preprogrammed alarm thresholds are

reached or at periodic preprogrammed times. The unique on-board help feature allows the user to

obtain a description, as well as syntax and examples, of any of the 59 commands.