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Jimmy JonesAug 18, 2025
Why do Hach sension1 Measuring Instruments show a Cal Std Error?
- LlfrazierAug 18, 2025
If your Hach Measuring Instruments display 'ERROR, ENTER, CAL and Standard', it means the value read is incompatible with the calibration algorithm. Make sure that you didn't measure one buffer twice and that the correct buffers were used. If you did, repeat the calibration with new buffers.












