LaMotte DC1100 Colorimeter - Manual (Page 7)

TROUBLE SHOOTING GUIDE
PROBLEM CHECK ACTION
Meter won’t
come on Battery? Replace, see pg. 6 of manual.
^ AC Adapter? See pg. 6 of manual.
^ AC Wall Outlet? Verify power source.
^ Contact LaMotte for
return authorization. Return to LaMotte for repair.
^
Comes on, but
readings drift Are instrument grade
reagents being used? Obtain instrument grade reagents.
^ Are there suspended solids
in sample? Filter both blank and sample
(after reaction).
NOTE: Do not use filtered blank for
sample reaction.
^ Do reading drift up scale? Bring samples to room temperature.
^ Readings drift down scale
with cold sample? Check for sample tube fogging, let
sample equilibrate to room temperature.
Suspect
Calibration Will meter blank? (zero) If no, see next page.
^ Are instrument grade
reagents being used? Obtain instrument grade reagents.
^ How old are the reagents? Contact LaMotte to verify age.
^ Check calibration with
standards? How old is the standard?
^ Is class “A” volumetric
glassware being used to
make up the standards? If not, obtain and see Standard
Methods.
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