DPD Chlorine Secondary Standard Solutions (1 or 2ppm)

Description Per EPA Guidelines for Drinking Water applications, the SP-600 device requires DPD Chlorine Secondary Standard Verification prior to each recorded/reported test. To ensure the accuracy of your SP-600 DPD Chlorine Method, Pyxis Lab® has developed unique liquid 1.0ppm & 2.0ppm DPD Chlorine Secondary Standards. These liquid standards are provided in a 125mL bottle including a COA and can be used as a secondary reference standard for DPD Chlorine Calibration Verification. Stable for up to 6 months, these liquid standards are easy to use and have been specifically designed at a low pH (4.0) to be used as a pre-cleaning agent agent for the sample cell prior to its use as a reference standard. If the SP-600 unit requires calibration, users may follow the operational manual instructions for field calibration using known Free Chlorine Standards or reset their unit to default  & factory calibration settings. If desired, the SP-600 unit may also be sent to the Pyxis Lab® facility for certified factory calibration.