YSI ADV6600 - Manual (Page 60)

Section 4. Calibration and Diagnostics
ADV6600
Y S I
Environmental
Page 50
6. Select option 1-Calibrate to access calibrations for the water quality sensors. The exact
appearance of the Calibrate Menu (as shown) will vary depending upon the sensors that are
enabled on your sonde.
7. Follow the instructions listed below for the calibration of each individual water quality sensor.
4-6.1. Temperature
There is no calibration required for the temperature sensor.
4-6.2. Conductivity
This procedure calibrates conductivity, specific conductance, salinity, and total dissolved solids.
Perform sensor calibration at a temperature as close to 25
o C as possible. This will minimize any
temperature compensation error.
Calibration:
1. Attach the sonde to a ring stand in an inverted position with the clean, dry calibration cup
attached.
2. Add enough conductivity standard to the calibration cup to ensure both openings of the
conductivity cell are completely covered. Rotate and/or move the sonde up and down to
remove any bubbles from the conductivity cell.
3. Allow at least one minute for temperature equilibration before proceeding.
4. Select Conductivity to calibrate the conductivity probe.
5. A second menu will offer the options of calibrating in specific conductance, conductivity, or
salinity. Calibration of any one option automatically calibrates the other three. Calibration in
specific conductance with a 10mS/cm standard is recommended.
6. Enter the value of the standard being used. Be certain that the units are correct and press Enter.
The current values of all enabled sensors will appear on the screen and will change as they
stabilize.
7. Observe the readings and when they show no significant change for approximately 30 seconds,
press Enter. The screen will indicate if the calibration has been accepted.
8. Press Enter again to return to the Calibrate menu. Rinse the sonde with purified water and dry
the sonde.
NOTE: The YSI conductivity system is very linear over its entire 0-100 mS/cm range. Therefore, it
is usually not necessary to use calibration solutions other than the 10 mS/cm reagent recommended
above for all environmental applications from low conductivity (freshwater) to high conductivity
(seawater). For users who want to assure maximum accuracy at the high and low ends of the
sensor range, YSI does offer the 3161 (1 mS/cm) and 3165 (100 mS/cm) conductivity standards.
Users of the 1 mS/cm standard should be particularly careful to avoid contamination of the reagent.
Because of contamination issues, YSI does not recommend using standards less than 1 mS/cm.