What could cause the Chlorine Secondary SpecCheck standards to not measure correctly?

Document ID

Document ID TE195

Published Date

Published Date 12/11/2018
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Question
What could cause the Chlorine Secondary SpecCheck standards to not measure correctly?
Summary
Chlorine SpecCheck Standards accuracy
Answer
There are several reasons for Chlorine SpecCheck standards to not read or measure correctly:
  1. The instrument is on the wrong program or for the Pocket Colorimeter II (PC II), the wrong mode (LR or HR) for the SpecCheck standards being used. Note: The SpecChecks are specified as Low Range (LR), Mid-range (MR), or High Range (HR). Confirm that the program or PC II mode matches the SpecCheck description. The Certificate of Analysis (COA) for the SpecCheck standards will list the appropriate instruments and program numbers to utilize the standards correctly.
  2. The clear SpecCheck vial was not used to zero the instrument or the SpecCheck vials are dirty.
  3. The SpecCheck vials are expired or the Certificate of Analysis (COA) is not valid for that lot.
  4. Electrical or mechanical issue with the instrument (in that case contact Hach Technical Support).

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