Temperature Measurements - Extech Instruments DO210 User Manual

Dissolved Oxygen (DO) Measurements
Measurement Preparation
Before taking measurements, perform the calibration described above if necessary.
Taking Measurements
1. Press and hold the Function button for at least 2 seconds to change from %O2 to mg/L or
from mg/L to %O2. For DO measurements select mg/L (milligrams per liter).
2. Immerse the probe in the solution under test. For optimum automatic temperature
compensation, immerse the probe to a depth of at least 4" (10 cm).
3. Wait until the display stabilizes.
4. The velocity of the liquid coming into contact with the probe must be at least 0.6 to 1
ft/min (0.2 to 0.3 m/s). If the solution is standing, stir the solution with the probe or use
an agitator.
5. Rinse the probe with clean water after each use and cover the probe head with the
probe head protective cover.
Oxygen in Air (%O2) Measurements
Measurement Preparation
Before taking measurements, perform the calibration described earlier if necessary.
Taking Measurements
1. Press and hold the Function button for at least 2 seconds to change from mg/L to %O2 if
necessary. For oxygen in air measurements be sure to select %O2.
2. Hold the probe in the area under test and wait until the display stabilizes.
Temperature Measurements
The lower display will indicate the temperature of a measured solution or the temperature of
the air (depending on what type of measurement the user is performing). To change the
temperature unit of measure
section:
 Press and hold the Setting button for 5 seconds (until a beep is heard) to access the
Setting mode
 Press the Setting button momentarily two more times
 Use the UP arrow button to select
 Press ENTER to save the setting and press ESC to return to the normal mode of operation
Data Hold
Press the Hold key to freeze the displayed value. The LCD will display HOLD along with the held
reading. Press the Hold key again to release the data hold function.
nd Quality Products Online at:
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C/ F follow the procedure below or refer to the Settings mode
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C or F temperature units
4
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