Buchi DuMaster D-480, Руководство по эксплуатации

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Operating instructions DuMaster D-480 ©BÜCHI Labortechnik AG
8 - Maintaining the instrument 236
To prepare the instrument for maintenance work follow the instructions in Preparing and following up
maintenance work.
Phase 2: Removing the drying tubes
Proceed as follows:

Open the front door.

Loosen the ground-in clamps at the small dryting tube (1).

Remove the small drying tube (1) from the instrument and unscrew the red caps.

Unscrew the large drying tube (2) from the top. Loosen the red cap.

Lossen the ground-in clamp on the bottom of the large drying tube (2).

Remove the large drying tube (2) from the instrument and unscrew the red cap.
Phase 3: Installing drying tubes, getting the instrument ready to measure
Proceed as follows:

Screw on the red caps onto the drying tubes.

Fasten the small drying tube again by means of the ground-in clamps.

Install the large drying tube.

Screw the large drying tube (2) tightly on top with the red cap.

Close the front door.

Close the "Replace part" dialog in the operating software. To do so, click
Finish
in the "Replace
part" dialog. By doing so, the gas will be automatically turned on. and the atmospheric nitrogen is
removed by flushing with CO
2
for five minutes.

Decide:
If...

... approximately the same flow and pressure values as prior to maintenance work are
displayed: The instrument is ready to measure again.

... distinctly different flow and pressure values to those displayed prior to maintenance work
are displayed: Perform a leak test. See Performing a leak test. The instrument is only ready
to measure when the leak test is successful.
To be observed after maintenance
If you have performed maintenance work that has a defined maintenance interval, you must manually
reset the "Status" field to zero on the "Maintenance intervals" dialog (accessible via
Options >
Maintenance > Intervals
. See Defining maintenance intervals in the software.