How often should a calibration check be done on the DR300?

Document ID

Document ID TE6258

Published Date

Published Date 01/06/2022
Question
How often should a calibration check be done on the DR300?
Summary
Pocket Colorimeter calibration check
Answer
It is recommended that the calibration on the DR300 should be checked every 3 months using SpecCheck Secondary Gel Standards. Regulatory agencies may have different requirements. 
A primary standard solution should also be used periodically to validate the test procedure, reagents, and instrument. Instructions for performing an Accuracy Check - Standard Solution Method can be found in the Hach method.

This is also true for the Pocket Colorimeter II.

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