
40
GB
7. Maintenance, cleaning and recalibraon
7.4.4 Overhaul and re-cer icaon
f
To provide the best possible service, the pressure balance should be returned as
complete units comprising the base, the piston and cylinder unit, and all the weights.
The base can also be serviced itself. The piston-cylinder unit with weights has to be sent
back for overhaul. In such instances, cer icaon issued aer overhaul can only refer to
f
the piston and cylinder and weight set numbers and not to the base to which they were
originally i ed.
f
Pressure balance bases will be stripped, all pipework cleaned, all seals replaced, worn
components replaced where desirable, and all reassembled and tested.
The weights will all be checked and brought to within original limits if possible. If one or
two weights are missing or beyond economical repair they will be replaced. If more are
missing/ beyond economical repair customer instrucons will be sought.
The piston unit will be checked for accuracy and sensivity. If it is not sasfactory for any
reason a quotaon will be submi ed for a replacement unit.
A new cer icate of accuracy will be issued for each overhauled pressure balance.
f
Unless otherwise instructed on order when there has been a slight change in area of
the piston unit the cericate will relect this; the accuracy will not be afected by more
than 0.03 %. For example the cericate of accuracy of an overhauled pressure balance
might show that the error does not exceed 0.05 % when the original cer icate shows
f
that the error did not exceed 0.02 %.
We can issue a
or DKD/DAkkS cericate of calibraon for an overhauled
factory
system. Details will be supplied on request.
Manual M
LDW-HK
odel
LR-
Cal
Содержание LDW-HK
Страница 16: ...16 GB 3 Speci ica ons f Side view Dimensions in mm without masses Front view Manual M LDW HK odel LR Cal...
Страница 21: ...21 GB 4 Design and func on G D C F E H J K Sec oned view of screw pump Manual M LDW HK odel LR Cal...
Страница 46: ...46 GB Manual M LDW HK odel LR Cal...
Страница 91: ...91 No zen Notes Anleitung Modell LDW HK Druckwaage Kolbenmanometer LR Cal...