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pHotoFlex
STD
Measuring range
exceeded or
undershot
Obviously incor-
rect measured val-
ues
ba75958e07
11/2020
6.2
Photometry
Cause
– Program not suitable
Cause
– Measurement disturbed by
external light
– Cell not correctly inserted
– Cell contaminated
– Cell shaft contaminated
– Dilution set incorrectly
– Selected program unsuitable
– Zero measurement incorrect
– Blank value incorrect
Remedy
– Select program with suitable
measuring range
– Dilute the sample
Remedy
– Close the external light cover.
– Insert the cell so that it is positioned
on the bottom of the cell shaft.
– Clean the cell
– Clean the cell shaft
– Set the dilution
– Select other program
– Perform zero measurement
– Remeasure the blank value
What to do if...
65
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