Calibration Procedure of HACH Pocket Turbidimeter - Up To

5.2 Calibration in Water Saturated Air
5.2.1 The DO probe to the meter Attach and turn on the instrument.
5.2.2 Prepare the storage and calibration chamber for calibration. This is the black
plastic tube with a small attached lid.
5.2.3 Open the small lid of the chamber and insert a wet-soaked sponge. A dry
compact sponge is provided with the supplies. Wet this with distilled water and
insert.
5.2.4 Insert the DO probe into the calibration chamber. The tip of the probe should not
be flooded with water. Ensure not to over wet the sponge.
5.2.5 Let the DO probe inserted in the chamber stand for 10 minutes.
5.2.6 Press the DO key to put the meter in the DO reading mode.
5.2.7 Press the “CAL” key.
5.2.8 The display will show 100%. Press the enter key.
5.2.9 The stabilizing icon will appear while the meter completes the calibration.
5.2.10 When calibration is complete, the meter will return to the reading mode.
Notes:
For more information/steps on the calibration procedure, please refer to pages 50-55 of
the instrument manual.