Extended Systems ExStik DO600, User Manual

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DO600-en-EU_V7.2 09/14 4
Calibration
1. Calibration should be performed on a daily basis.
2. Turn the meter ON
3. Press and hold the MODE/HOLD button until % is displayed on the LCD.
4. If the meter has not been used for seven (7) days or longer, allow the electrode to fully
polarize. This may take 2 ‐ 3 minutes.
5. Place the electrode cap onto the electrode. The sponge contained in the cap should be only
moistened (not soaked) with (distilled water) or clean tap water. Be sure that the electrode
membrane is clean and dry or the calibration will be incorrect. There needs to be an air gap
between the membrane and the sponge. Never touch the membrane, as skin oil will affect
the electrode response.
6. Wait until the reading stabilizes then press and hold the CAL/RECALL button until CAL is
shown in the lower display. The readings will blink “101.7” and “SA” will appear.
7. When the calibration is complete “End” will appear and then the meter will return to the
normal measurement mode. Turn off the meter.
Note: The “SA” will not appear if the calibration fails.
8. Optional ’zero oxygen’ calibration (improves measurement accuracy for very low or very
high DO measurements):
Place the electrode in a zero oxygen calibration solution, such as 5% sodium sulfite, wait for
stability and press the CAL/RECALL button until CAL is shown in the in the lower display.
Stability in a zero solution may take many minutes, depending on electrode history.
Note: Sodium Sulfite can become deposited on the electrode and on the “coined” surface
of the electrode retaining collar. The presence of the Sodium Sulfite will negatively affect
future DO measurements until such a time where ALL of it is removed from the electrode.
9. Optional Electronic Zero calibration. If the DO600 is not making stable measurements or
you are replacing the electrode with a new assembly, perform this Zero calibration.
Turn off the meter, remove the electrode by unscrewing the retaining ring and pull off the
electrode.
Turn
on the meter and wait for the Self calibration to complete.
Set the Mode to %.
Press and Hold the CAL button until CAL appears on the display. When the cal cycle
completes, the display should read 0.0%.
Turn off the meter.
Re ‐ attach the electrode. Perform the electrode cap calibration from Step 5.
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