Smartline Autosampler 3900 Manual / Handbuch V 1508 03/2007

14 Injection Principle
1. P2- I/O connector; Inputs, see page 27.
2. P1- I/O connector; Relays outputs.
3. Mains switch.
4. Mains input.
5. Fuses and voltage selector.
6. CE-mark.
7. RS-232 communication interface connector.
8. Fan, only when tray-cooling option is installed.
Fig. 4 Rear side of the autosampler AS 3900.
Injection Principle
A unique sequence of valve switching and syringe dispenser controlled
sample withdrawal enables the AS 3900 to inject sample volumes in a
range from a few microliters to milliliters in a simple and reproducible
manner.
Therefore three different methods for injection can be selected:
• Full loop: The sample loop is completely (quantitatively)
filled with sample resulting in extremely good
reproducibility.
• Partial loop fill: The sample loop is partially filled with sample;
low sample loss and programmable injection
volumes.
• µl pick-up: After aspiration from the vial the sample volume
is transported into the loop with transport liquid
(mobile phase) from another vial; no sample loss.
S1
ON DIP
S2
ON DIP
OUT IN