Operation, Troubleshooting – vacuum system – Hach-Lange BUHLER 2000 Water sampler User Manual
Page 21
Operation
Page 21
Manual BÜHLER 2000/1029
Troubleshooting – vacuum 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
Adjustment of conductivity too
low. Distilled water has been
used as sample medium.
Contact service department
Electrodes do not react,
system flooded
No contact to electrodes
Check cable connection
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
Sampler does not extract
samples
Valve system/pinch valve does
not function correctly
Check valve system/pinch valve
or contact service department
Defective diaphragm
Renew diaphragm
No pressure / vacuum at
pump
Hoses are squeezed
Check hoses