Measurement Computing CIO-EXP-RTD16 User Manual

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1 INTRODUCTION

The CIO-EXP-RTD16 is a signal conditioning accessory designed for use with the DAS08 and DAS16
family of data acquisition boards. Circuitry to excite selected RTDs on a per channel basis converts the
RTD's output current to a voltage suitable for conversion by a DAS08 or other analog to digital
conversion board.

This manual is loosely organized into sections that explain the CIO-EXP-RTD16:

Installation:

Installation and initial setup.

Voltage Reading: Explains how to set up for and make voltage only readings.

RTD: Describes how two, three, and four-wire type RTDs are connected.

Please carefully read the Installation section and follow the initial installation and test steps. Verify the
installation with a voltage measurement prior to connecting RTDs and attempting to measure
temperature.

2 SOFTWARE INSTALLATION

There is no software shipped with the CIO-EXP-RTD16. The CIO-EXP-RTD16 is an accessory board
intended to be used with an A/D board such as a CIO-DAS08 or -DAS16. A program called InstaCal is
shipped with every DAS board. InstaCal has installation information in it about the CIO-EXP-RTD16.
Refer to the Software Installation Manual for complete information.

To update the InstaCal configuration file to include CIO-EXP-RTD16 information, start InstaCal, select
the board number of the DAS board that has the CIO-EXP-RTD16 connected to it, and select the channel
number the CIO-EXP-RTD16 is connected to. The options for the CIO-EXP-RTD16 will be available to
set and change. After this is done, you can use the InstaCal calibrate and test options.

You must use InstaCal to update and configure the configuration file CB.CFG to include the
CIO-EXP-RTD16 settings before you can use the CIO-EXP-RTD16 with InstaCal, Universal Library and
some applications packages. Initially, accept the default settings so that you can verify the installation.
You may have to go back and make changes with InstaCal once you have selected a sensor and read the
section on installing that sensor.