The DR900 shows three dashes "---" or "+ + +" symbols as a reading, what could this mean?

Document ID

Document ID TE635

Published Date

Published Date 12/20/2021
Question
The DR900 shows three dashes "---" or "+ + +" symbols as a reading, what could this mean?
Summary
DR900 shows "---" or "+ + +
Answer
The display of dashes "---" indicates that the sample is under range and the plus signs "+ + +" indicates the sample is over range. If the result is over range, one can try diluting the sample and repeating the test.

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