User manual EUTECH INSTRUMENTS CYBERSCAN DO 5000 DO METER

[. . . ] Instruction Manual CyberScan DO 5000 Bench Dissolved Oxygen Meter (Also Applicable for CyberScan PCD 5500) Technology Made Easy . . . 68X292330 Rev. 2 07/03 PREFACE Thank you for selecting the Eutech Instruments CyberScan DO 5000 bench meter. This meter measures dissolved oxygen and temperature (°C/ °F). This instruction manual serves to explain the use of the CyberScan DO 5000 bench meter as a step-by-step operational guide to help you familiarize with the meter's features and functions. [. . . ] Do not use weather bureau pressure, as it is corrected to sea level. Touch enter to accept the reading and exit to the Setup screen. OR Touch exit to return to the DO/ BOD/ OUR/ SOUR Setup screen, without making a change. 50 Instruction Manual CyberScan DO5000 5. 11 Set Alarm Limits Set D. O. Maximum ON Use arrow keys to highlight desired Limit Touch ON/OFF or edit to change 51 Instruction Manual CyberScan DO5000 This option allows you to set alarm limits for the DO/ BOD/ OUR/ SOUR measuring mode. If the DO value of the measurement is outside the boundaries set by the minimum and maximum limits, an audible alarm and/ or a visual warning will appear to let you know that your sample measurement was outside of the set limits. Access the Set Alarm Limits screen from the DO/ BOD/ OUR/ SOUR Setup screen. The current alarm limits are displayed on the screen. Use the arrow keys to highlight the Alarm option you want to modify. Touch ON, OFF or edit to set the status of the alarm. Use the keypad to enter the new limit value 5. Touch enter on the keypad to accept this limit and return to the set DO limits screen. If you do not want to change the limit value, you can touch exit on the keypad and return to the Set DO/ BOD/ OUR/ SOUR limits screen. OR Touch exit to return to the Setup screen, without making any changes. 52 Instruction Manual CyberScan DO5000 5. 12 Set Print Criteria Set D. O. Print Criteria Current PRINT CRITERIA - Date/Time/Channel - Sample ID - DO Measurement - Temperature - ATC - Last Standardization - Current Standard - Atmospheric Pressure - Salinity - Meter Model # / serial # - Operator ON ON ON ON ON ON ON ON ON ON save OFF Use arrow keys to highlight print criteria and then touch ON/OFF to change Touch save to save the print criteria 53 Instruction Manual CyberScan DO5000 This screen allows you to select which criteria are printed with the measurement when you print the data or send it to the computer. The status of the current print criteria is displayed on the screen. The criteria option is active if "ON" appears to the right of the option. It is inactive if "OFF" appears to the right of the option. Any active criteria will be printed on demand. Access the Set Print Criteria screen from the DO/ BOD/ OUR/ SOUR Setup screen. The current print criteria are displayed on the screen. Use the arrow keys to highlight the print criteria option you want to modify. Touch ON or OFF change the status of the criteria. [. . . ] Mode System Setup Screen Time Date Print Configuration Parity Data Bits Stop Bits Operator ID Beeper Status Display Contrast Default Setting 12 hour time mode month/date/year Baud Rate 19200 None 8 1 none ON 15 DO Setup Print Configuration Data Configuration Sample ID Print Interval Display Resolution Auto Read Mode Temperature Units Stability Criteria Alarm Limits Alarm Limit Low Alarm limit High All parameters ON All parameters ON none manual X. XX OFF Celsius Medium OFF 0 1500 94 Instruction Manual CyberScan DO5000 10 DO FUNDAMENTALS Meter Operation The CyberScan DO 5000 meter uses the polarographic method of determining dissolved oxygen concentration. A voltage is maintained across two electrodes (a gold cathode and a silver anode) and an electrolyte separated from the sample solution by an oxygen permeable membrane. Oxygen diffuses form the sample across the membrane where it is reduced at the cathode. 1) 02 + 2H20 + 4e- 4OH- The current generated, I, by such an electrode is proportional to the oxygen concentration of the sample. [. . . ]