Getting Started - Extech Instruments DO210 User Manual

Getting Started
Note: The dissolved oxygen probe assembly may be shipped from the factory dry. If the
probe does not contain electrolyte solution, refer to the Electrolyte Replacement section
below for information on adding the electrolyte solution prior to initial use.
Filling the Electrolyte Container Prior to Initial Use
1. Unscrew and remove the electrolyte container from the tip of
the probe.
2. Fill the electrolyte container with new electrolyte.
3. Screw the electrolyte container back onto the electrode holder
and probe handle. Excess Electrolyte may be forced out
through the threads. Wipe clean.
4. Lightly tap the probe to remove air bubbles.
Calibration
For first time use or after long periods of non‐use, calibrate the instrument using the procedure
below. The procedure should be performed in an open, well‐ventilated area.
1. Connect the oxygen probe plug to the probe input socket.
2. Switch ON the meter by pressing the Power/ESC button.
3. The lower display should indicate the %O2 unit symbol and a temperature value.
4. The upper display will begin fluctuating. Wait approximately 3 minutes for the upper
display to stabilize.
5. Press the HOLD button and the display will show the HOLD icon.
6. Press the REC button. The display will show "CAL" flashing and the meter display will
begin counting down from 30 to zero; the meter will then display the END icon.
7. The upper display will show a value approximately 20.9 or 20.8 (typical concentration of
oxygen in air).
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