Calibration Procedures for YSI 6820 Sonde

Calibration Procedures for YSI 6820 Sonde

Using Laptop – You will need a bucket to dump used solutions out.

1.  Take off storage end cap and carefully dry off sensors with a paper towel. Also dry out cap. (You may blow on sensors to help remove excess water)

2.  Open Ecowatch Software.

3.  Connect to Sonde by clicking on the Sonde icon.

4.  You may need to click the escape button several times to get to the main menu.

5.  Select #2 to Calibrate.

Conductivity

1.  Select # 1 SpCond to calibrate for Specific Conductivity (Recommended) and press Enter.

2.  Type 10 for the mS/cm and press Enter.

3.  Pour conductivity rinse into cap and screw onto Sonde. Shake the Sonde to saturate the sensors with conductivity solution and pour into waste bucket.

4.  Now pour fresh conductivity solution into end cap (approx ½ full) and screw cap on. Rotate Sonde so conductivity cell is under the solution.

5.  Once readings become stable, Press Enter. SpCond has now been calibrated. Press Enter again to continue. Type 0 to return to Calibration menu.

6.  Dump the used conductivity solution into conductivity rinse bottle. Rinse sensors with the tap water. Repeat at least twice. Dump waste into bucket. Dry sensors.

D.O

1.  Now select #2 for Dissolved Oxygen then select # 1 for DO sat% .

2.  Enter the barometric pressure in mm Hg. You can obtain this from the Kestrel or from NOAA.com. If the pressure is in inches Hg, multiply by 25.4 to get mm Hg. Example (29.95” Hg x 25.4 = 760.73 mm Hg)

3.  Allow time to stabilize. Once the time has elapsed; click Enter when readings are stable. If value is not accepted, repeat previous steps. If it still doesn’t except, look to see if air bubble is under membrane on D.O. sensor. Return to main menu.

Pressure

1.  Select #3 for Pressure. Enter Depth of Sonde (0) press Enter. Allow to stabilize. Once stabilized press Enter. Press Enter to return to main menu.

PH

1.  Check that cup and sensors are dry and pour PH buffer 7 rinse in cup. Agitate rinse throughout sensors and discard. Pour fresh PH buffer 7 solution into cup and tighten. Verify PH sensor is submerged. (Stand Sonde upright)

2.  Select #4 to calibrate for PH

3.  For the Cape Fear River we will select 2 Point calibration option.

4.  Once numbers are stable, press enter. Once calibrated, press Enter to continue with buffer 10.

5.  Pour PH 7 buffer from cap into PH 7 rinse. Rinse cap with tap water. Repeat twice, discard and dry cap and sensors.

6.  Pour PH buffer 10 rinse into cap and repeat step 1

7.  Allow Sonde to stabilize then press Enter. Pour PH buffer 10 into 10 rinse cup and rinse sensors with tap water. Dry. Return to main menu.

Turbidity

1.  Select #5 for Optic Turbidity

2.  Select 2 Point. Ensure that cap and sensors are clean and dry.

3.  Pour D.I. water into cap for 0 point.

4.  Enter 1st point as 0. as it is mandatory that 0 be calibrated 1st. Do not screw cap all the way down for this calibration. Press Enter and allow to stabilize. You may press 3 to clean optics. (This will enable wiper pad and will rotate twice around optics port)

5.  Once 0 value is calibrated, discard water and dry cap and sensors.

6.  Pour 123 rinse into cap and rinse sensors.

7.  Pour fresh 123 standard into cap. Try to eliminate any bubbles when pouring. Allow to stabilize and calibrate. Press Enter to return to main menu. Calibration of YSI 6820 is now complete. Exit out of Ecowatch or begin logging.