YSI ProDSS Use, Calibration And Maintenance Manual
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YSI ProDSS Use, Calibration And Maintenance Manual

Water quality meter
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YSI ProDSS Meter Calibration and Maintenance
Calibration and Maintenance Procedures: YSI ProDSS
These procedures are to be performed by program staff or people who have been trained by staff.
The ProDSS should be calibrated for all parameters before every monitoring session.
Table of Contents
-
Putting the unit together
• Cable connection
• Pre-Sensor Installation
• Sensor installation
-
Calibration
• Barometer
• Conductivity
• pH
• Turbidity
• Dissolved oxygen
-
Maintenance
-
Short term storage
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Long term storage
The instrument/cable connectors, bulkhead ports, and sensor connector ends are not wet-
mateable and can become damaged if they come into contact with moisture. Never connect the
cable connector to the handheld unit, or install a sensor if they are wet! Carefully follow
sensor tightening instructions during installation. If any resistance is felt during any tightening
(sensor, sensor guard, port plug), stop tightening, loosen nut or guard, and start again.
K:\Streamkeepers\Monitoring\Eqpt & supplies\Calibration-Maintenance\SOPs\YSI ProDSS maint-
cal SOP's
A FEW NOTES BEFORE GETTING STARTED
1

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Summary of Contents for YSI ProDSS

  • Page 1 Calibration and Maintenance Procedures: YSI ProDSS These procedures are to be performed by program staff or people who have been trained by staff. The ProDSS should be calibrated for all parameters before every monitoring session. Table of Contents Putting the unit together •...

  • Page 2: Putting The Unit Together

    If the unit has been stored under the short term procedures, continue to the Calibration section below. The ports on the ProDSS bulkhead are universal; therefore, you can install any sensor into any port. For highest accuracy, always install a conductivity/temperature sensor to compensate all measurement data for temperature and dissolved oxygen data for conductivity.
  • Page 3 YSI ProDSS Meter Calibration and Maintenance Dissolved Oxygen 1. Remove the DO sensor from the container. Slide the plastic protective cover off of the end of the sensor; you may need to “wiggle” it back and forth to get it off.
  • Page 4 YSI ProDSS Meter Calibration and Maintenance 1. Remove the pH sensor from the container. Holding the bottle upright, remove the bottle covering the tip of the sensor and replace the “open” cap and o-ring with the storage cap and store in container. If the tip of the pH sensor appears dirty, refer to the Maintenance section below for cleaning techniques.
  • Page 5 USB battery pack. For the instrument to recognize that it is using AC power, you must start charging the ProDSS while on. After the instrument recognizes it is being charged, it can be turned off to finish charging.
  • Page 6 (last day of listed month), The YSI ProDSS will automatically store calibration information into a GLP file (good lab practices). This includes what was calibrated, who calibrated it, and when it was calibrated.

  • Page 7: Barometer Calibration

    YSI ProDSS Meter Calibration and Maintenance Barometer Calibration The YSI ProDSS has a built in barometer that has been factory calibrated and rarely needs to be recalibrated. The accuracy of the barometer is essential for dissolved oxygen calibration. Before and after each season, check the barometer readings for accuracy by testing against the weather station located in the Roads Department upstairs.
  • Page 8 YSI ProDSS Meter Calibration and Maintenance CHECKING PRIOR CALIBRATION STABILITY: 1. Record the date, your initials, season, and conductivity standard strength on the conductivity calibration data sheet. 2. Thoroughly rinse the calibration cup with a small amount of conductivity standard solution and then discard.
  • Page 9 If you get calibration error messages, check for proper sensor immersion, verify the calibration solutions is fresh, the correct value has been entered into the ProDSS, and/or try cleaning the sensor (reference the Maintenance section below on proper cleaning techniques...
  • Page 10 YSI ProDSS Meter Calibration and Maintenance Pre Season Maintenance and Calibration: 1. Perform 3-point calibration with office standards. (detailed instructions follow) Record lot #s and expiration dates on data sheet. 2. Indicate “Y” in the calibrated column if calibration was successful.
  • Page 11 YSI ProDSS Meter Calibration and Maintenance Calibration: Setting the midpoint (pH buffer 7) 1. Rinse sensors once with distilled water, once with old buffer solution, and twice with new solution. To rinse, fill cup ~2”, attach cup to unit and lightly shake the unit while tilting it back and forth.
  • Page 12 YSI ProDSS Meter Calibration and Maintenance calibration and you will have to start over again with the pH calibration. Setting the upper point (pH buffer 10) 1. Rinse sensors once with distilled water, once with old buffer solution, and twice with new solution.

  • Page 13: Turbidity Calibration

    Never mix standards together, i.e. formazin and the above standard This standard will expire 1 year after opening! If you open a fresh gallon of the YSI 6073G turbidity standard, write the date it was opened on the label in permanent marker Equipment Needed: •...

  • Page 14: Dissolved Oxygen Calibration

    POST-SEASON CALIBRATION CHECK AND QUALITY CONTROL: At the end of each monitoring season, re-check the integrity of the meter by testing with the YSI turbidity standard. It must meet the control limits in Streamkeepers’ Quality Assurance Project Plan: the readings on the meter need to be within ±...
  • Page 15 YSI ProDSS Meter Calibration and Maintenance Pre-Monitoring Session Calibration Procedures The DO sensor should have already been inspected for cleanliness during sensor installation, but if the sensor is visibly dirty, refer to the Maintenance section below for proper cleaning procedures.
  • Page 16 YSI ProDSS Meter Calibration and Maintenance water 6. Set the unit aside right side up and wait 5 to 15 minutes for complete air saturation in the cup chamber. 7. Select the calibration button , then select DO, then DO%.
  • Page 17 YSI ProDSS Meter Calibration and Maintenance 5. Take the 1st pipette out of the manganous sulfate solution. Check and make sure it is filled with approximately 2 mL of solution and then add it to the BOD #1 bottle by immersing the tip of the pipette into the sample before injecting the solution.
  • Page 18 YSI ProDSS Meter Calibration and Maintenance Titration Steps: NOTE: dilute the chemicals going into the sink during the process with a continuous stream of tap water to prevent damage to plumbing. 1. Put on the plastic apron, face shield and Nitrile/Latex gloves.
  • Page 19 YSI ProDSS Meter Calibration and Maintenance 21. If the end point was overrun, back-titrate the sample with the bi-iodate standard (1 drop = 0.05 mg/L using a disposable 2 mL pipette) and correct the final value and data sheet. (For values halfway between the 0.1 mL marks, round down even numbers and round up odd...

  • Page 20: Maintenance

    MAINTENANCE When performing maintenance on the ProDSS and its sensors, follow the specified procedures in this section, which have been taken directly out of the manual, or it could void the warranty. For more information on the warranty, consult the manual.
  • Page 21 YSI ProDSS Meter Calibration and Maintenance Conductivity Sensor NOTE: Be careful when handling this sensor, the tip has a temperature sensor that is fragile. 1. Dip the cleaning brush from the maintenance kit in distilled or clean tap water, insert the brush at the top of the channels and sweep the brush back and forth 15-20 times.
  • Page 22 Sensor Cap Replacement YSI recommends replacing the sensor cap once a year, but can last up to 2. It is VERY important to keep the instruction sheet that is shipped with the new sensor and cap, or a new replacement cap.
  • Page 23 Calibration Code Label prior to selecting Update Sensor Cap Coefficients. • If you receive an error message after several entry attempts, contact YSI Technical Support for assistance (1-800-765-4974). • Calibrate the sensor after cap replacement and coefficient update; refer to the DO Calibration section above.

  • Page 24: Sensor Storage

    SENSOR STORAGE There are two ways to store the YSI ProDSS: short term, and long term. Only use the Short Term Storage procedures if the unit and its sensors will be stored for 4 weeks or less. If the unit will be stored for over a month, use the Long Term Storage procedures described below.
  • Page 25 YSI ProDSS Meter Calibration and Maintenance Turbidity 1. Loosen the retaining nut on the sensor using the removal tool, use fingers to finish removing the retaining nut from the bulkhead. 2. Remove the sensor from the bulkhead. Inspect the tip for dirt or debris, if it warrants cleaning, see the Maintenance section above for proper cleaning techniques.

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