Hach AS950 Grundlegende Installation Und Wartung Seite 27

Problem
Sampler does not have
sufficient lift.
Sample volume is not
correct.
Table 2 Troubleshooting table (continued)
Possible cause
Strainer is not completely
submerged.
Intake tube has a leak.
Pump tube is worn.
Pump roller assembly is worn.
Incorrect volume calibration
Incorrect tube length is
specified in the sampling
program.
Intake tube does not purge
completely.
Strainer is not completely
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
(2071 or 4652).
Replace the intake tube.
Replace the pump tubing
on page 21.
Contact technical support.
Repeat the volume calibration.
Make sure that the correct tube
length is in the sampling program.
Make sure that the intake tube is as
vertical and as short as possible.
Install the shallow depth strainer
(2071 or 4652).
Replace the pump tube and/or roller
assembly.
Turn the liquid detector on and
complete a volume calibration.
Calibrate the liquid detector with the
same liquid that is sampled.
English 27