ProDSS Calibration Worksheet When the Environment Demands It This calibration worksheet can help document your calibration and track the performance of your sensors. Please follow the detailed calibration procedures in the ProDSS manual or your facility’s standard operating procedure (SOP) to ensure all calibrations are as accurate and as consistent as possible. Refer to the YSI Solution Expiration Dates document to ensure your calibration solutions are fresh. In addition to using fresh standards, never accept an out-of-range or questionable calibration results. Calibration Date Technician: Handheld Serial Number: Handheld Software Version: Cable Serial Number: Temperature Reading when sensor is dry and in room temp air: Accurate? Y N Conductivity Acceptable value is less than 1 µS/cm Reading when sensor is dry and in room temp air: Actual Reading in solution before calibration is accepted: Reading in calibration solution after calibration is completed: Conductivity Cell Constant in GLP* record after calibration: Acceptable range for ProDSS conductivity/temperature sensors (626902) is 4.5 to 6.5 Acceptable range for integral (i.e. built-in) sensors on ODO/CT assemblies is 4.4 to 6.4 Optical Dissolved Oxygen Barometric pressure: Actual Reading before DO% calibration is accepted: Reading in DO% calibration environment after calibration is completed: ODO gain in GLP record after calibration: Acceptable range is 0.75 to 1.50 pH Actual Readings during calibration Buffer Calibration Value pH pH mV** Acceptable pH mV in buffer 7 -50 mV to 50 mV 4 +165 to +180 from pH 7 buffer mV value 10 -165 to -180 from pH 7 buffer mV value pH slope in GLP record after calibration: Acceptable range is ~ 55 to 60 pH/mV (Ideal is 59.16 mV/pH) *GLP stands for Good Laboratory Practice file. This calibration record contains important information about the calibration result. **The pH mV at the time of calibration (Sensor Value) can also be seen in the final pH GLP record. ProDSS Calibration Worksheet When the Environment Demands It ORP Actual Reading in solution before calibration is accepted: Reading in calibration solution after calibration is completed: Acceptable range is -100 to 50 ORP Cal Offset in GLP record after calibration: Turbidity Calibration value (FNU)* Actual Reading during calibration 0 Acceptable range for Actual Reading during calibration of the first point is -10 to 10 FNU *Note: The turbidity sensor can be calibrated to 3 points. Either 12.4 or 124 FNU standard can be used for the second point, but not both. Other calibration values can be used when calibrating. 12.4* 124* 1010 Depth (Completed in Air) Actual Reading before calibration is accepted: Reading in air after calibration is completed: Ammonium Actual Readings during calibration Concentration** (i.e. Calibration Value) mg/L mV*** Acceptable mV when the sensor is new 1st point: 1 mg/L -20 mV to 20 mV 2nd point: 100 mg/L +90 to +130 from mV value in 1 mg/L standard Nitrate Actual Readings during calibration Concentration** (i.e. Calibration Value) mg/L mV*** Acceptable mV when the sensor is new 1st point: 1 mg/L 180 mV to 220 mV 2nd point: 100 mg/L -90 to -130 from mV value in 1 mg/L standard Chloride Actual Readings during calibration Concentration** (i.e. Calibration Value) mg/L mV*** Acceptable mV when the sensor is new 1st point: 10 mg/L 205 mV to 245 mV 2nd point: 1,000 mg/L -80 to -130 from mV value in 10 mg/L standard **Other standard concentrations can be used. A 2 point calibration without chilling a third calibration solution is extremely accurate and is the preferred method. However, if there is a large temperature variation during sampling, a chilled third calibration point is recommended. ***The mV at the time of calibration (Sensor Value) for each point can also be seen in the GLP record after a calibration is complete. Tel +1 937.767.7241 800.897.4151 (US) [email protected] YSI.com ©2017 YSI, a xylem brand Printed in the USA. W87 0117
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