Hach-Lange BUEHLER 3010 4010 4210 4410 Manual - Manual (Page 28)

Operation
Page 28 Manual BÜHLER BU4010ff
Troubleshooting – flow-proportional sampling system
If a fault develops in your sampler, we can only provide prompt assistance if you give us the type and
serial number of the apparatus concerned. You will find these data on the type plate.
The more precise your description of the fault is, the better our fault diagnosis will be.
Symptom Possible cause Action
Level electrodes do not react,
system is flooded Adjustment of conductivity is
too low. Distilled water is used
as sample medium Contact service department
No contact to electrodes Check cable connections
Sampler does not extract
samples System is leaking Check whether all hoses and
connections are tight
Pump/diaphragm defective Check pressure/vacuum of
pump
Metering vessel not tight, no
vacuum Check whether metering vessel
is tight (union nut)
Level electrodes are bridged Clean electrodes
Valve system/pinch valve does
not work correctly Check valve system/pinch valve
or contact service dept.
Pump does not produce
pressure/vacuum Diaphragm defective Replace diaphragm
Hoses are kinked Check hoses
Inaccurate sample volume
System has been initialized or
hardware has been changed Calibrate