Metrohm 746 VA Trace Analyzer - Manual (Page 123)

4 Introduction to the operation
746 VA Trace Analyzer / 747 VA Stand
4-38
13 Storing the calibration data in the method
• The recalculated coefficients of the calibration curve are first stored only
in the method loaded in the working storage. To store these data perma-
nently, this method must be copied to the method memory. Proceed as
follows:
− Press the yellow key. The dialog page "METHODS"
appears showing the methods stored in the instrument.
− If the CALCRV.mth method is secured (an * is shown on the left
of the file name), it must first be unsecured. For this, select the
CALCRV.mth method with the cursor keys. Press the softkey
< >> > and then the softkey . The asterisk
next to the file name disappears, the method is unsecured. Then
press the softkey < >> > again.
− Press the softkey . The softkey bar changes and
presents the sources for copying a method.
− Press the softkey . The CALCRV.mth method
is copied from the working storage to the method memory; the
method of the same name containing the old calibration data will
be overwritten.
4.3.5 Performing the determination
To perform the lead determination using the calibration curve previously recorded,
the following steps are necessary:
1 Switch to dialog page "MONITORING"
• Press the yellow key. The dialog page "MONITORING"
whose header shows the loaded method
CALCRV
appears.
2 Switch the program run mode to determination
If the parameter Run mode is set to calibration , proceed as follows:
• Use the cursor keys to select the field Run mode .
• Press the space bar to enter the edit mode.
• Press the softkey and confirm this entry with the
key.
3 Entry of the sample volume
Enter the sample volume as follows:
• Use the cursor keys to select the first field below the title
Sample
size/S0 .
• Press the space bar to enter the edit mode.
• Enter 10 mL and confirm this entry with the key.