10
MI605 Dissolved Oxygen Meter
9. CALIBRATION PROCEDURE
Calibration is simple and is recommended every time the meter
is switched on.
y
Make sure the probe is ready for measurements (see Probe
Preparation), i.e. the membrane is filled with electrolyte and the
probe is connected to the meter and properly polarized.
y
Switch the meter on by pressing the
ON/OFF
key.
y
The "COND" message will be displayed for about 45 sec. to
inform the user that the probe is in auto-conditioning mode
(automatic polarization).
y
Once “COND” disappears, the probe is polarized and the
instrument can be calibrated.
y
Remove the probe protective cap.
y
Press CAL. "----" appears on the larger LCD together with "CAL"
to indicate that the instrument is in calibration mode.
y
The instrument will automatically standardize itself to the
actual saturation value. After approx. 1 minute it will display
"100%" to indicate that the calibration is complete.
Notes: It is recommended to re-calibrate the meter whenever
probe, membrane or electrolyte is changed.
To exit the calibration mode, press CAL.
Switching from readings in % O
2
to readings in mg/L does not
require recalibration.
