52 Operating Guide
5 Operating the 7693A Automatic Sampler
2
Place up to 150 samples in the three vial racks, according
to the programmed sequence. Figure 2 shows tray loading
for a sequence that uses tray positions 6 through 21.
3 When finished loading the tray, press [P] on the tray front
panel to move the gantry from the Park position to the
Home position. (To use the sample tray, the gantry must
be out of the Park position.)
Placing vials in the turret (no sample tray)
You can place up to sixteen vials, a solvent A, a solvent B,
and a waste bottle in the standalone turret. If you use the
transfer turret, you can load three sample vials and the
solvent and waste bottle capacity increases to 15 (Figure 1).
Placing vials for sandwich injections
The ALS system has the ability to draw liquid from multiple
vials to create multilayered, or sandwich, injections. Each
layer of sample, internal standard, or solvent can be
separated by a layer of air (from 0% to 10% of the syringe
size). Figure 3 and Figure 4 show examples of 2- and 3- layer
sandwich injections.
Figure 2 Loading tray positions
150
141
1
10
21
110
101
100
91
60
51
50
41
6
8
9
7
11
20
12
13
14
16
18
19
15
17
First vial in
position 6
Last vial in
position 21
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