BUCHI DuMaster D-480 - Manual (Page 169)

Operation Manual D-480 ©BÜCH Labortechnik AG
8 - Maintaining the instrument 169
Maintenance work to be performed by the customer
Note
Observe that the maintenance or replacement times indicated here are greatly dependent on the
respective sample matrix. All intervals and figures indicated are only examples and by no means
guarantee service life of consumables or wear and tear parts.
Maintenance work to be performed by the customer
The following table lists the maintenance work that you can perform yourself as customer and the
intervals for these tasks.
Maintenance work Interval See ...
Replacing the ash crucible Depending on the sample matrix,
but not later than max. 400
measurements. Replacing the ash crucible.
Instrument and supply lines leak
test At least every 2 months. Performing a leak test (on
page 242).
Checking hard disk capacity and
relocating data if necessary. Backup every week, relocate data
to disk as required. Starting the database
backup (on page 96).
Calibration When the daily factor is no longer
between 0.9 and 1.1, but not later
than every 2 years. Performing calibration.
Clean ball valve, possibly
replacing seals. Every 1500 analyses. Ball valve maintenance.
Replace sealing elements (o-
rings, quad rings, half shells) As required. When to replace sealing
elements (on page 194).
Removing sealing elements
from grooves (on page 195).
Cleaning the carousel As required. Removing, cleaning and
installing the carousel.
Check/clean quartz glass bridge,
check o-rings at the same time Whenever you change tubes. Removing, cleaning and
installing the quartz glass
bridge.
Replace reaction tubes
(combustion tube / post
combustion tube / reduction tube),
replace fillings, check plugs and o-
rings at the same time Replacement intervals, see
Options > Maintenance >
Intervals in the operating
software. Removing/installing and
conditioning the reaction
tubes.
Emptying and filling reaction
tubes.
Check/replace drying tube; check
o-rings at the same time Daily visual inspection Removing and installing
the drying tube (on page
236).
Filling the drying tube (on
page 234).
Check supply gases for correct
intake pressure and sufficient
volume Before every series of analyses. Gases and chemicals to be
provided (on page 108).
Recommendation
Taking out a service contract for full annual maintenance saves time and money. Contact your service
office for details.