Hach AS950 Manual Del Usuario página 26

Problem
Sampler does not have
sufficient lift.
Sample volume is not
correct.
26 English
Table 2 General troubleshooting (continued)
Possible cause
Strainer is not fully
submerged.
Intake tube has a leak.
Pump tube is worn.
Pump roller assembly is
worn.
Incorrect volume calibration. Repeat the volume calibration.
Incorrect tube length is
specified in the sampler
program.
Intake tube does not fully
purge.
Strainer is not fully
submerged.
Worn pump tubing and/or
roller assembly.
The liquid detector is
disabled.
Liquid detector does not
operate properly.
Solution
Install the shallow depth strainer.
Replace the intake tube.
Replace the pump tubing
Contact technical support.
Make sure that the correct tube length
is in the sampler program.
Make sure that the intake tube is as
vertical and as short as possible.
Install the shallow depth strainer.
Replace the pump tube and/or roller
assembly.
Set the liquid detector to on and
complete a volume calibration.
Calibrate the liquid detector with the
same liquid that is sampled.
on page 21.