LAC 51:XII.1111. Calibrationtemp/Validation of Temperature Measuring Devices

A. Water temperature within the water treatment plant shall be measured using a thermometer, thermocouple, or other temperature measuring device having a minimum accuracy of ±0.5 degrees Celsius (0.5°C). B. Service thermometers, thermocouples, and other temperature measuring devices used for determining water temperature within the water treatment plant shall be validated at a frequency of once per month using a field thermometer that has been calibrated annually against a NIST certified thermometer. The NIST certified thermometer shall be sent back to the manufacturer for recalibration at least once every three years. C. Records of validations/calibrations on each temperature measuring device shall be maintained for at least three years.