YSI ProDSS - Manual (Page 35)

33
Calibration
ProDSS sensors (except temperature) require periodic calibration to maintain accurate measurements. Calibration
procedures follow the same basic steps with variations for specific parameters.
Before calibration
• Enter GLP user-defined data if applicable to user requirements (User ID, Probe ID, User Field #1/2)
( GLP menu on page 17 ).
• Setup sensor options, settings, and coefficients as applicable ( Probe menu on page 37 ).
NOTICE: Install a gray port plug in all exposed ports. Exposure to water can cause damage or corrosion to the
bulkhead connectors not covered by the warranty.
Calibration setup (pH, ORP, ISE, conductivity, turbidity)
NOTE: Make sure the calibration cup, sensor guard, and all sensors are clean.
NOTE: If using the calibration cup, make sure to install the sensor guard before placing the sensors into the
calibration cup.
NOTE: The sensor guard and calibration cup should be used for the turbidity and DO calibration. All other
calibrations can be performed in other laboratory glassware.
NOTE: Make sure to use a clean probe guard during calibration to prevent contamination of the calibration
environment.
1. Install a clean, dry sensor and sensor guard (if used) onto the bulkhead ( Figure 4 on page 9 ).
NOTICE: Install a gray port plug in any exposed port. All sensors must have either a sensor or port plug
installed.
2. Fill the calibration cup with a moderate amount of water and tighten the calibration cup onto the bulkhead. Use
the water to rinse the cup and the sensor to be calibrated. Discard the rinse.
3. Thoroughly rinse the calibration cup with a small amount of the calibration standard for the sensor to be
calibrated. Discard the standard.
4. Refill the calibration cup with fresh calibration standard to approximately the first line for pH, ORP, and turbidity
calibration. Fill to the second line for conductivity calibration ( Figure 44 on page 34 ).
NOTE: Volumes will vary. Make sure that the temperature sensor and the sensor to be calibrated are submerged
in calibration solution, except when performing a DO% saturation calibration.
NOTE: Be careful to avoid cross-contamination with other standards.
NOTE: These rinsing recommendations are only suggested guidelines for highest data accuracy. Make sure to
follow your organization Standard Operating Procedures (SOPs) for instrument calibration and operation.
5. Immerse the sensor(s) in the standard and tighten the calibration cup onto the bulkhead.
6. Calibrate the sensor(s).