BUCHI DuMaster D-480 - Manual (Page 146)

Operation Manual D-480 ©BÜCH Labortechnik AG
7 - Using the instrument 146
 Allocate the daily factor to the real samples in the sample view (text view). Enter the daily factor
in the corresponding factor column.
How to selectively trigger the daily factor
Proceed as follows:
 Define the type of factor calculation. For that purpose, open the "Configure Calculations" dialog in
the operating software by selecting Options > Settings > Calculation.
 Define the mode of factor determination:
If you in section "Factor determination"...
 ... select "sequentially" then the daily factor is computed group-by-group and changes
throughout the day.
 ... select "entirely" the daily factor is computed on the basis of all factor samples in the file.
An average factor is computed.
 Then click OK to save your settings.
 Measure a standard substance, that must be defined in Options > Settings > Standard
Samples, as a factor sample.
 If you only want to determine the daily factor from a certain number of samples, select these
samples in the sample view (text view).
 Open the "Daily factors" dialog in the operating software by selecting Math. > Factor.
 If you selected a certain number of samples for the calculation, check "Use standard samples
only".
 Click Yes to continue. The daily factor is computed automatically and allocated to the subsequent
samples.
How to set automatic daily factor determination
Proceed as follows:
 Define the type and degree of automation for factor calculation. For that purpose, open the
"Configure Calculations" dialog in the operating software by selecting Options > Settings >
Calculation.
 Define the mode of factor determination:
If you in section "Factor determination"...
 ... select "sequentially" then the daily factor is computed group-by-group and changes
throughout the day.
 ... select "entirely" the daily factor is computed on the basis of all factor samples in the file.
An average factor is computed.
 Specify the degree of automation for factor determination. Check "Automatic factor
determination". factor calculation.
 Then click OK to save your settings. As soon as you measure a substance defined as a factor
sample, the daily factors are automatically computed afterwards.
Recommendation for automated daily factor determination
When automatically computing the daily factor, it is useful to enable the "Standard tolerance
monitoring" function. This checks standard samples for fluctuations of results. If the tolerance define
in Options > Settings > Standards is exceeded, continuous analysis is stopped.
Enabling "Standard tolerance monitoring"
Proceed as follows:
 Open the "Error handling" dialog in the operating software by selecting Options > Settings >
Error handling.
 Check "Standard tolerance monitoring".