Hach QbD1200+, Manual, Page: 21 / 128

Problem Possible cause Solution
The measurements take too
much time to complete and/or
the results are consistently too
low. The UV reactor is almost
expired. Replace the UV reactor. Make
sure that there is a sufficient
quantity of carrier gas.
The fittings around the reactor
are loose. Make sure that the fittings
around the reactor are tight.
The UV reactor does not work. The UV reactor is expired or
damaged. Replace the UV reactor.
Contact technical support.
The sample is not found. There is not enough solution in
the reagent bottle. Fill the reagent bottle with
solution.
The sample tube is not
connected to the auto sampler
or it is not in the sample flask. Make sure that the sample tube
is connected to the auto
sampler or that it is in the
sample flask.
A hardware failure. Make sure that there is a
sample to use for the
procedure. Contact technical
support.
Significant carryover occurs
from sample to sample. The reactor is not fully flushed
after each measurement. Examine the carrier gas supply.
If the problem continues,
contact technical support.
A pressure error frequently
shows during the system health
test. The carrier gas is empty or
low.
Measurements frequently show
the result as "0". The background TOC reading
is larger than the sample TOC
reading. Fill the reagent bottle with
water, then do a new
background qualification
procedure.
The report output contains no
information. An error occurred when a
report was made. Contact technical support.
Changes are not saved when
the instrument power is set to off
then on. An error occurred when a
setting was changed.
The qualification procedure
does not start. An error occurred during a
qualification procedure.
The USB import and/or export
function does not operate with a
USB flash drive. The USB flash drive is not
connected. Connect the USB flash drive to
the instrument.
The USB flash drive is not
found or is corrupt. Fix or format the USB flash
drive (if necessary), then
connect it to the instrument.
The network connection does
not show. The ethernet cable is not
connected. Make sure that the ethernet
cables is connected to the
instrument.
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