152DO Operation: SOUR MeasurementXL40 and 60 metersThis mode is used to measure Specific Oxygen Uptake Rate (SOUR). The SOUR is used todetermine the oxygen consumption or respiration rate, is known as the milligram of oxygenconsumed per gram of volatile suspended solids per hour. Remember to setup your SOURmeasuring mode parameter from the SOUR Setup screen.To Take SOUR Measurements1. Touch SOUR Start icon to being SOUR measurement.2. The screen will indicate the test is in progress with RUNNING and a timer on the mainscreen (the time the test is run is setup in the SOUR Setup option, see page 76). TheSOUR value in mg/hr/g and the DO reading appears as mg/L.3. To end the SOUR test, touch Stop SOUR icon or let the timer expire.If you touch the Stop SOUR icon before the timer expires, you will get a messageindicating your measurement reading might not be accurate.If you let the timer expire, the message states the measurement has been stopped.4. Touch OK to confirm either message.5. Another dialog box appears asking if you wish to save current SOUR result. Touch OKto save or Cancel to erase and return to SOUR measurement screen.6. If you touched OK, a new dialog box appears to ask if you want to view the results.Touch OK to proceed to the Result View screen showing SOUR value and otherimportant test details.7. Touch Exit to exit Result View screen and return to SOUR measurement screen.Touch Delete All to delete all SOUR test results in memory. OR Touch Print to sendthe SOUR test results to a computer or printer.SOUR measurement in progress. SOUR Measurement View ResultScreen
