Getting Started; Filling The Electrolyte Container Prior To Initial Use; Calibration - Extech Instruments 407510 User Manual

Getting Started

Note: The dissolved oxygen probe assembly may be shipped to you from the factory dry.
If the probe does not contain electrolyte solution, refer to the Electrolyte Replacement
section of this manual for the instructions for 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 any air bubbles.

Calibration

For first time use or after long periods (several days) of non-use, calibrate the instrument using the
following steps. The procedure should be performed in an open, well-ventilated area.
1. Ensure that the sensor is DISCONNECTED from the meter.
2. Turn ON the meter.
3. Slide the O
4. Press the zero key to null the meter (the display should indicate "OO").
5. Connect the DO sensor to the top of the meter (remove the plastic probe head protective
cap).
6. Allow the meter to stand for at least five minutes until the most stable value is displayed.
7. Press the O
/DO selector to the O
2
Cal key and the display will indicate approx. 20.9 (typical O
2
position.
2
3
in air).
2
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