Hach DR1300 FL User Manual page 24

Problem
The readings
are low.
The readings
are low.
The readings
are high.
The readings
are high.
The readings
are high.
Unexpected
readings
24 English
Possible cause
The wrong parameter
was selected.
The reagents have
expired.
The reagent blank
value is not correct or
missing.
The sample vials are
dirty or have scratches.
The wrong parameter
was selected.
The sample is not a
clean water sample.
Solution
Make sure to select the correct
parameter (e.g., free chlorine) and
use the correct reagents for the
parameter.
Discard the set of reagent bottles.
Use a new set of reagent bottles. Do
a reagent blank calibration. Refer to
Do a reagent blank calibration
on page 16.
Make sure to do a reagent blank
calibration before a set of new
reagent bottles is used. Refer to
a reagent blank calibration
on page 16.
If the problem continues, do a
calibration check. Refer to
calibration check
Clean the sample vials if dirty.
Replace the sample vials if the
sample vials have scratches.
Make sure to select the correct
parameter (e.g., free chlorine) and
use the correct reagents for the
parameter.
The DR1300 FL is intended for use
with clean water samples.
Do
Do a
on page 17.