YSI 95 - Manual (Page 12)

Operation Section 4
YSI Incorporated Model 95 8
3. The LCD will prompt you to enter the local altitude in hundreds of feet. Use the arrow keys to
increase or decrease the altitude. When the proper altitude appears on the LCD, press the
ENTER button once.
EXAMPLE: Entering the number 12 here indicates 1200 feet.
4. The LCD will prompt you to enter the salinity of the sample(s) that you will be measuring. You
can enter any number from 0 to 80 (ppt). Use the arrow keys to increase or decrease the salinity
setting. When the proper salinity appears on the LCD (zero for fresh water), press the ENTER
button.
5. The Model 95 should now display CAL in the lower left of the display, the calibration value
should be displayed in the lower right of the display and the current DO reading (before
calibration) should be on the main display. Make sure that the DO reading (large display) is
stable, then press the ENTER button. The display should read SAVE then should return to the
Normal Operation Mode.
For best results:
•
Each time the Model 95 is turned off, re-calibrate before taking measurements.
•
Calibrate at a temperature within
±
10°C of the sample temperature.
4.3 4.3 4.3 4.3 MAKING MEASURMENTS MAKING MEASURMENTS MAKING MEASURMENTS MAKING MEASURMENTS
The Model 95 has four modes:
Ø Dissolved Oxygen % -- A measurement of oxygen in percent of air saturation (partial
pressure).
Ø Dissolved Oxygen mg/L -- A measurement of oxygen solubility in mg/L.
Ø Recall -- Allows previously stored data to be displayed.
Ø Erase all -- Allows ALL previously stored data to be deleted.
Temperature is displayed in both dissolved oxygen modes.
NOTE: When you turn the Model 95 off, it will “remember” which DO mode you used last and
will return to that mode the next time the instrument is turned on.
To change between the Model 95 modes, simply press and release the MODE button. The Model
95 will cycle through the modes as follows:
Dissolved Oxygen
in % with°C
Dissolved Oxygen
in mg/L with °C
Recall Erase all