Buchi DuMaster D-480, Operation Manual

Page: 140 / 354

Operating instructions DuMaster D-480 ©BÜCHI Labortechnik AG
7 - Using the instrument 140

Display on the PC "Press. Output": 900 - 1000 mbar

Is the flow meter display OK?

Measuring gas flow meter on the PC "MFC CO2": 700 ml/min

CO
2
flow meter on the PC "Flow CO2": approx. 700 ml/min

O
2
flow meter on the PC during O
2
dosing "MFC O2": as selected in the method

Does the desiccant still have sufficient capacity?

At least the last third should still be unused.

Have the maintenance intervals been observed? Check:

The drying tube.

The Ash crucible / ash finger.

The Regainer.

The Reductor.

Is the detector signal small and stable?

Is the proper method allocated to the respective samples?

Is the carousel loaded?
If you answer yes to all of the above, you can start measuring blank value, conditioning and daily
factor samples.
Checklist for real sample measurement
Purpose
The checklist helps you to check whether the instrument is ready to measure real samples.
Checklist
Go through the following list:

Were the results of a blank value determination OK?

Were the results of the conditioning sample measurement OK?

Have you processed a series of measurements with daily factor samples?

Are the operating gases on?

Are the furnaces at setpoint temperature?

Is pressure OK?

Display on the PC "Press. Input": 1300 - 1350 mbar

Display on the PC "Press. Output": 900 - 1000 mbar

Is the flow meter display OK?

Measuring gas flow meter on the PC "MFC CO2": 700 ml/min

CO
2
flow meter on the PC "Flow CO2": approx. 700 ml/min

O
2
flow meter on the PC during O
2
dosing "MFC O2": as selected in the method

Does the desiccant still have sufficient capacity?

At least the last third should still be unused.

Have the maintenance intervals been observed? Check:

The drying tube.