User manual EUTECH INSTRUMENTS WATERPROOF CYBERSCAN PD 300 PHDISSOLVED OXYGEN METER

[. . . ] Instruction Manual CyberScan PD 300 Waterproof Hand-held pH/Dissolved Oxygen/Temperature Meter 68X248910 05/2000 ver 1 Technology Made Easy . . . Preface This manual serves to explain the use of the Waterproof CyberScan PD 300 hand-held meter. It functions in two ways, firstly as a step by step guide to help you to operate the meter. It is written to cover as many anticipated applications of the Waterproof CyberScan PD 300 meter as possible. If there are doubts in the use of the CyberScan, please do not hesitate to contact the nearest Eutech Instruments Authorized Distributor. [. . . ] Select READY indicator ON or OFF Select the number of pH calibration points Select between °C and °F units for temperature readings Figure 21 on the right shows the setup sequence for this program subgroup. Figure 21 ­ P 3. 0: Unit configuration program 28 P3. 1: READY Indicator and auto endpoint function This program lets you select: · · · "READY indicator on" to indicate when the reading is stable. Select auto endpoint on to "hold" the reading when it is stable for more than 5 seconds. The display automatically freezes, and the HOLD indicator appears on the left side of the display. Press the HOLD key to release the display and access other functions. From measurement mode 1. Press the v or w keys to scroll through subgroups until you view parameter P3. 0. 5. Press the ENTER key to confirm selection and to proceed to step 4 of P3. 2. Press the CAL/MEAS key to return to measurement mode. Figure 22 ­ P 3. 1: Selecting READY function) NOTES: Meter default is set for READY indicator on and auto endpoint function off. You can also change the Ready indicator and auto endpoint function in the DO mode. Any changes you make to the Ready indicator/auto endpoint function in pH mode will also change in DO mode. 29 P3. 2: Selecting number of pH calibration points Program P3. 2 lets you select the number of calibration points that appear in pH calibration mode: 2, 3, 4, or 5. The meter will automatically exit calibration mode after you have calibrated to your selected number of points. Press the v or w keys to scroll through subgroups until you view parameter P3. 0. Press the ENTER key to confirm selection and to return to the subgroup menu. Press CAL/MEAS key to return to measurement mode. 4. 5. 6. See Figure 23. Figure 23 ­ P3. 2: Select number of pH calibration points 30 P3. 3 Selecting °C or °F This meter lets you select between °C and °F units for temperature readings. Press the v or w keys to scroll through subgroups until you view parameter P3. 0. Press the ENTER key to confirm selection and to return to the subgroup menu. Press the CAL/MEAS key to return to measurement mode. 4. 5. 6. Figure 24 ­ P3. 3: Select temperature units See Figure 24. NOTES: · You can switch between °C and °F in Program P5. 2 of % saturation mode (or P4. 3 in mg/l mode). If you switch between °C and °F in pH mode, the meter will also switch in % saturation or mg/l mode. 31 7. 5 P4. 0: Resetting to factory default settings (pH) This program lets you reset all pH parameters to factory default settings. This clears all calibration data and any other pH setup functions you might have changed. The following settings will remain as you have set them: · · · Temperature unit of measure (°C or °F) The temperature offset calibration value All DO calibration data and parameters There are also some other parameters that retain settings when reset is done. See Addendum 3 on page 58 for a table of factory default settings. From measurement mode 1. Press the v or w keys to scroll through subgroups until you view parameter P4. 0. NO retains current settings YES resets to factory default settings. Figure 25 ­ P4. 0: Reset to factory default values (pH 300 meter only) 4. [. . . ] Oxygen is also produced by aquatic plants and algae as a by-product of photosynthesis. The amount of DO that can be held by water depends on 3 factors: water temperature, salinity, and atmospheric pressure. Amount of DO increases with decreasing temperature (colder water holds more oxygen). Amount of DO increases with decreasing salinity (freshwater holds more oxygen than saltwater does). [. . . ]