CONTENTS
SECTION 1 INTRODUCTION................................................................................................................. 1
1.1 PRINCIPLES
OF OPERATION...................................................................................................... 1
1.2 DISPLAY
AND FUNCTION KEYS............................................................................................... 2
1.3 FUNCTION
SWITCH ..................................................................................................................... 2
1.4 POWER
ON SELF-TEST................................................................................................................ 2
SECTION 2 PREPARING THE METER ............................................................................................... 3
SECTION 3 CALIBRATION ................................................................................................................... 5
3.1
PERCENT AND MG/L.................................................................................................................... 5
3.2 DETERMINING
CALIBRATION VALUE.................................................................................... 5
3.3 CALIBRATION
IN AIR.................................................................................................................. 6
3.4 CALIBRATION
IN AIR-SATURATED WATER.......................................................................... 7
3.5 CALIBRATION
BY WINKLER TITRATION............................................................................... 7
3.6 ZERO
CALIBRATION ................................................................................................................... 8
3.7 RESETTING
THE DEFAULT ZERO CALIBRATION ............................................................... 10
SECTION 4 SALINITY........................................................................................................................... 11
SECTION 5 OPERATION...................................................................................................................... 13
5.1 TEMPERATURE
MEASUREMENTS ......................................................................................... 13
5.2 DISSOLVED
OXYGEN MEASUREMENTS .............................................................................. 13
5.3 MEASURING
OXYGEN IN FLUIDS OTHER THAN WATER.................................................. 13
5.4 RECORDING
TO INTERNAL MEMORY................................................................................... 14
5.5 REVIEWING
RECORDED LIVE DATA..................................................................................... 15
5.6 PRINTING
DATA FROM MEMORY .......................................................................................... 16
5.7 SENDING
RECORDED DATA TO A PERSONAL COMPUTER .............................................. 16
5.8 ERASING
THE MODEL 52 MEMORY ....................................................................................... 17
SECTION 6 SYSTEM SETUP................................................................................................................ 18
6.1 SETTING
THE TIME AND DATE............................................................................................... 18
6.2 SETTING
UP AUTOSTABLE...................................................................................................... 18
6.3 SETTING
COMMUNICATION PARAMETERS ........................................................................ 20
6.4 LAST
DIGIT SUPPRESSION....................................................................................................... 21
6.5 CONTRAST
ADJUSTMENT........................................................................................................ 21
SECTION 7 PERSONAL COMPUTER INTERFACE........................................................................ 23
7.1 WRITING
YOUR OWN APPLICATIONS SOFTWARE ............................................................ 23
SECTION 8 MAINTENANCE AND TROUBLESHOOTING............................................................ 25
8.1 BATTERIES.................................................................................................................................. 25
8.2 POWER
ON SELF-TESTING AND ERROR DISPLAY MESSAGES ........................................ 25
SECTION 9 DISCUSSION OF MEASUREMENT ERRORS............................................................. 27
9.1 TYPE
1 ERRORS – INSTRUMENT COMPONENTS.................................................................. 27
9.2 TYPE
2 ERRORS – PROBE ACCURACY ................................................................................... 27
9.3 TYPE
3 ERRORS - CALIBRATION............................................................................................. 28
9.4 ERROR
CALCULATION EXAMPLE.......................................................................................... 28
SECTION 10 WARRANTY AND REPAIR ...................................................................................... 31
i