Hach-Lange BUEHLER 3010 4010 4210 4410 Manual - Manual (Page 25)

Operation
Page 25 Manual BÜHLER BU4010ff
Troubleshooting – vacuum 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
Electrodes do not react,
system flooded Adjustment of conductivity too
low. Distilled water has been
used as sample medium. Contact service department
No contact to electrodes Check cable connection
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 (screw cap)
Filling level electrodes bridged Clean electrodes
Valve system/pinch valve does
not function correctly Check valve system/pinch valve
or contact service department
No pressure / vacuum at
pump Defective diaphragm Renew diaphragm
Hoses are squeezed Check hoses