22
98.0
*
% 08.15
mg/L
Cal mg/L
0.0
ppt
740
mmHg
24.38°C 11:33
AM
UP
DOWN
DIGIT
NEXT
9. Press [ENTER] to confirm your calibration. The screen will momentarily display
“D.O.
CALIBRATION SAVED”
as shown below.
98.0
*
% 8.15
mg/L
Calibration
0.0
ppt
740
mmHg
24.38°C 11:33
AM
D. O. CALIBRATION SAVED
UP
DOWN
DIGIT
NEXT
NOTE: If you wish to abort calibration before you have pressed [ENTER], you may press
[MODE] to return to the calibrate menu without saving the new calibration value. You may
also press [NEXT] to select a different parameter (any change made will not be saved).
10. Press [MODE] to return to the Main mode. The instrument is now calibrated and ready to
measure dissolved oxygen and temperature. See
7.1 Main Mode, Making Measurements
Barometer
The YSI Model 5100 has an internal barometer for pressure compensation during AUTO
Dissolved Oxygen Calibration. This barometer only needs to be calibrated when it is no longer
reading the correct barometric pressure. If the 5100 is kept at a fairly constant ambient
temperature (
±
10°C), the barometer calibration should be accurate for approximately 30 days.
The Model 5000 does not contain a barometer, therefore, the current barometric pressure must be
entered before an AUTO Cal is performed. The pressure value displayed is the setting that was
entered and stored during the previous calibration.
From the calibration menu press the [DO CAL] soft-key, then press the [NEXT] soft-key until
the barometric pressure is flashing and “Barometer” appears in the top right corner of the display
as follows:
Flashing digit
Message
