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