User manual EUTECH INSTRUMENTS CYBERSCAN DO 100 DISSOLVED OXYGEN METER

[. . . ] Instruction Manual DO 100 Hand-held Dissolved Oxygen Meter 68X235201 Technology Made Easy . . . rev 4 01/04 Preface This manual serves to explain the use of the DO 100 hand-held meter. It functions as a step by step guide to help you to operate the meter and as a handy reference guide. It is written to cover as many anticipated applications of the DO 100 meter as possible. If there are doubts in the use of this meter, please do not hesitate to contact the nearest Eutech Instruments/Oakton Instruments Authorised Distributor. [. . . ] Press MI/ or MR/ key to toggle between ON or OFF. Press ENTER or MODE key to go into the next menu. Figure 21: READY 8. 1. 8 P 4. 2: A. oFF The meter has a Power Auto-off feature that switches off the unit 20 minutes after the last key press. In situation where longer period of time is needed to take measurement, the power Autooff feature can be switched off in this menu. Once the [A. oFF P4. 2] menu is reached (see Figure 22), press MI/ OFF). The meter will accept and move on to the next menu. NOTE: Press HOLD key to skip any part of the operation and move on to the next menu, or press CAL/MEAS key to exit setup menu to go back to measurement mode. Figure 22: Auto-Off or MR/ key to turn Auto-off feature ON (or 29 Instruction Manual DO 100 8. 1. 9 P 5. 0: r. Set This allows you to clear all parameters programmed above and re-set it to factory default values. Once the [r. Set P 5. 0] menu is reached (see Figure 23), press MI/ (or OFF). The meter will clear all values and go back to measurement mode. or MR/ key to turn reset feature ON Figure 23: Re-set All Values 30 Instruction Manual DO 100 8. 2 SET Function in mg/L or ppm Measurement Mode This part of the SETUP function allows display of values and the changing of parameters unique to the mg/L measurement mode. Figure 25 on the following page shows the flow diagram of the SETUP menu. Press SET key to enter the first level in its setup menu. To move from one menu to the next without changing any parameter, simply press HOLD key as shown in Figure 25. At any level, press CAL/MEAS to exit setup function and go back to the measurement mode. Press ENTER or MI/ or MR/ key to enter the menu to change parameter or simply to view 8. 2. 1 This 1. 3. P 1. 0: Clr clears all memory data input keyed during measurement. Press MI/ or MR/ key to switch to "ON". Press ENTER key to confirm deleting all memory data. The meter will pause briefly and move on to the next menu. See Figure 24. NOTE: Press HOLD key to skip this operation and move on to the next menu, or press CAL/MEAS key to exit setup menu to go back to measurement mode. NOTE: The data cleared relates to the input taken while the meter was in mg/L or ppm measurement mode. To clear data input in % Figure 24: Clear Menu Saturation measurement mode, switch the measurement mode to % Saturation and refer to Section 8. 1. 1 on page 23. 31 Instruction Manual DO 100 Figure 25: Flow Diagram in SETUP Menu (mg/L or ppm) 32 Instruction Manual DO 100 8. 2. 2 P 2. 1: SAL This is a useful feature that allows you to key in the salinity value of the sample solution to be measured. Once you come to the [SAL, P 2. 1] menu shown in Figure 26, press ENTER. Use MI/ or MR/ key to set the Salinity value in ppt of the liquid where DO is being measured. Salinity correction values from 0. 0 to 50. 0 ppt can be entered. [. . . ] If DO level is too high, more power is used than necessary for aeration and the process becomes costly. In boiler water application, presence of oxygen in the water will increase corrosion and helps build up boiler scale that inhibits heat transfer. In such instance it is critical to keep DO concentration to a minimum. Some pollutants such as acid mine drainage produce direct chemical demands on oxygen in the water. [. . . ]