57
SECTION 5,
continued
2. The sample must have a flow rate or stirring rate that allows
for accurate probe performance. See Section 5.5.2 on
page 58. Make sure that no air bubbles are trapped in the
sensing area of the probe tip.
3. Press the
CAL
key. The Cal icon will appear in the upper left
corner of the display. The main display will show
100%
.
4. Press the
ENTER
key. The stabilizing icon will appear while
the meter completes the calibration.
5. When the calibration is complete, the meter will return to the
reading mode. Press the
EXIT
key during the calibration
sequence to back out of the calibration routine, one screen at
a time, without completing a calibration.
Note: If the
Cal
and
?
icons flash after calibration, the calibration failed
and needs to be repeated. See Error 6 in SECTION 8
TROUBLESHOOTING.
5.4.6
Calibration Review
To review the last calibration:
1. Press the
REVIEW
key on the keypad. The date and year of the
last calibration will show.
2. Press the
TIME
key on the keypad to view the time of the
last calibration.
3. Press the
UP ARROW
. The dissolved oxygen concentration of
calibration will show.
4. Press the
DO
key to view the % saturation and mg/L values of
calibration.
5. Press the
UP ARROW
key. The barometric pressure (in hPa) at
the time of calibration will show. Section 5.10 contains a unit
conversions table.
6. Press the
UP ARROW
key. The salinity entry of calibration
will show. Press the
key to print a calibration report.
Press the
EXIT
key to leave the calibration review.