Campbell AVW1 User Manual download pdf (Page 3)

CR10 and VW Sensors, 2002/12/18 1

Introduction

About This Manual

This manual tells how to read VW sensors using Campbell Sci-

entific CR10 and CR10X data loggers with the AVW1 or

AVW100 interface and the AM416 or AM16/32 multiplexer.

CR10 and CR10X

Instructions

The CR10 provides instruction 28 to read VW sensors. The

CR10X provides instruction 28 and instruction 131 to read VW

sensors. Both loggers use the instruction 4 to read thermistors

or RTDs.

VW Interface Modules There are three vibrating wire interfaces modules available, the

AVW1, the AVW4, and the AVW100. We discuss only the

AVW1 and AVW100. The AVW1 can be used with either

instruction 28 or instruction 131. The AVW100 works only with

instruction 131.

Multiplexer The older AM416 multiplexer has been replaced by the AM16/

32 multiplexer. Either multiplexer can be used to control 16 VW

sensors with temperature or 32 VW sensors without tempera-

ture.

Logger Software Logger software called PC208 or LoggerNet is used to create and

transfer a monitoring program to the logger and later to retrieve

stored data from the logger. You can find sample monitoring

programs at www.slopeindicator.com. Go to Support - Tech

Notes - Sample Programs for CR10X.

You can modify these programs to meet your needs. If you need

help, you can request programming services from Slope Indica-

tor. Note that Slope Indicator cannot provide unpaid support for

these programs.

About

Data Reduction

VW sensors return a frequency signal that must be converted to

units of pressure, strain, or displacement. The conversion pro-

cess and other data reduction issues are discussed in the manual

for each type of sensor.

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Campbell AVW1 User Manual Page 3