(Shaw Super-Dew) - Shaw Moisture Meters - #1

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Moisture Meters Ltd, Westgate, Bradford, BD1 3SQ, England Tel ++44(0)1274 733582, Fax: ++44(0)1274 370151, e-mail: mail@shawmeters.com Super-DewManual0704.doc CONTENTS UNPACKING YOUR SUPER-DEW....................................................................................................1 SETTING UP AND INITIAL CALIBRATION ..................................................................................2 DRY LIMIT SETTING ..............................................................................................................................2 WET LIMIT SETTING (AUTO-CAL)..........................................................................................................2 CALIBRATION ROUTINE..................................................................................................................3 ALARM SETTINGS.............................................................................................................................4 ALARM TRIPS AND HYSTERESIS ............................................................................................................4 THE DRY ALARM.................................................................................................................................4 THEWET ALARM.................................................................................................................................4 ANALOGUE OUTPUTS .......................................................................................................................5 THE 4-20MA OUTPUT ...........................................................................................................................5 THE 0-1V OUTPUT ...............................................................................................................................5 PROBLEM SOLVING ..........................................................................................................................6 ANY PROBLEMS?.............................................................................................................................6 PROBLEM: COAXIAL SHORT CIRCUIT .................................................................................................6 PROBLEM: OVER FULL SCALE READING ............................................................................................6 PROBLEM: COAXIAL CABLE OPEN CIRCUIT........................................................................................6 PROBLEM:WET READINGS - SLOW DRY DOWN.................................................................................7 PROBLEM: SHORT CIRCUIT SENSOR (INDICATION MORE THAN FULL SCALE) ......................................7 CALIBRATION HUMIDITY JARS ..............................................................................................................7 GENERAL INFORMATION................................................................................................................8 THE SHAWSENSOR. DESCRIPTION, THEORY AND OPERATING CONDITIONS ..................8 CONSTRUCTION............................................................................................................................8 TEMPERATURE ..............................................................................................................................9 OPERATING TEMPERATURE.....................................................................................................9 HAZARDOUS AREA INSTALLATION ........................................................................................9 CONSTANT TEMPERATURE UNIT............................................................................................9 INSTALLATION CONDITIONS-SENSOR .....................................................................................10 PRESSURE...................................................................................................................................10 VACUUM......................................................................................................................................11 RESPONSE TIME ........................................................................................................................11 IMPORTANT ...............................................................................................................................12 GUARANTEE...............................................................................................................................12 SENSOR CABLE ..........................................................................................................................12 BASIC DEFINITIONS ........................................................................................................................13 WATER VAPOUR PRESSURE ........................................................................................................13 RELATIVE HUMIDITY ...................................................................................................................13 DEWPOINT TEMPERATURE .........................................................................................................13 PARTS PERMILLION BY VOLUME..............................................................................................13 PARTS PERMILLION BYWEIGHT...............................................................................................13 SAMPLING SYSTEMS.......................................................................................................................14 SAMPLE SYSTEMINSTALLATION AND SET-UP ......................................................................14 MAINTENANCE..............................................................................................................................15