Deadweight Tester / Pressure Balance
GB
LR-
Cal
LDW-H
Operating Instructions
LR-
Cal
LDW-H
24
4. Troubleshooting measures
.
If faults cannot be rectified by the operator, the system must be withdrawn from
operation immediately and this information of the fault condition be supplied to
the manufacturer.
Repairs must only be carried out by the manufacturer. Unauthorized repairs and
changes on the appliance are not allowed.
Table: Fault description and measures
.
Type of fault
Measures
I. Unable to build up pressure / leak in the system
Check if there is enough fluid in the
system/reservoir.
Close outlet valve correctly
Attention:
Do not over tighten outlet
valve more than finger tight, otherwise the
valve seat could be damaged.
Check whether the seals have been
placed in the clamp for the piston-cylinder
system and test specimen and whether
they are properly positioned.
II. Unable to build up pressure, or range cannot
be reached
After the clamping of the piston-cylinder
system and the test specimen, air may be
trapped in the system.
Please note:
The system should be
vented before beginning with calibration.
For this purpose, proceed according to
section 3.1.4.
Afterwards, build the pressure back up.
III. Slow lowering of the piston in equilibrium
Leak in the system, see fault I.
After the clamping of the piston-cylinder
system and the test specimen, air may be
trapped in the system, see point II.
Afterwards, build the pressure back up.
IV. Piston is not rotating or does not respond
readily
Attention:
If the piston is not turning
easily or appears to be 'sticking', do not
under any circumstances force it to turn.
Doing so could cause lasting damage that
would seriously affect measurement
accuracy.
The piston must be cleaned (see section
5.1.1)
Further help can be found through DRUCK & TEMPERATUR Leitenberger GmbH, Germany.
