The display on my Pocket Colorimeter II™ shows a flashing square or zero. What does this mean?

Document ID

Document ID TE497

Published Date

Published Date 01/03/2022
Question
The display on my Pocket Colorimeter II™ shows a flashing square or zero. What does this mean?
Summary
Pocket Colorimeter II™ flashing a small square or zero
Answer
The flashing square indicates that the instrument needs to be zeroed before it can take a measurement. Place a sample cell containing your blank solution into the instrument and press the zero key

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