Metrohm 824 Easy Sample Changer - Manual (Page 31)

3.4 Automatic operation
824 Easy Sample Changer, Operation
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3.4 Automatic operation
3.4.1 Preparing a sample series
• Prepare all the samples to be processed. Select the sample vessel
size according to your type of sample rack. The setting for the pre-
defined lift position must be matched to the size of your sample
vessels.
• Place the sample vessels on the rack. Start with rack position 1.
• Do not forget to place a rinsing/conditioning beaker at the highest
rack position. Most sample changer methods require a special
beaker, see method description p. 29ff.
In order to process a series of samples a suitable method must first be
loaded, see below.
3.4.2 Method selection
1x <SELECT>
STIR 1 STIR 2
3x <SELECT>
After pressing the <SELECT> key a method can be selected by using
the <Ð> and <Ï> keys. Four predefined simple standard methods are
available (Methods 1,2,3 and 4).
LEDs LED 1 to 4 show the selected method. The selected method is
accepted with <SELECT>.
Return to the normal operating mode with 2x <SELECT>.
3.4.3 Starting a method
START
A method is started with the <START> key.
• When a method is started the sample changer is first initialized, i.e.
the lift is moved upward as far as it will go and the sample rack is
moved to the starting position. The magnet code of the rack is read
in and the corresponding rack table, in which the beaker positions
on the rack are defined, is loaded.
• While the method is running the status LED blinks slowly (once per
second).
• After the start of the method the starting sequence is carried out
once. This contains commands for preparing for a series of sam-
ples.
• When all rack positions have been processed the final sequence is
carried out.