User`s guide

Operation

174

The pen-clip can be removed from a sample tube by inserting a

wide-bladed screwdriver between the clip and the tube, close to the

groove, and prying them apart. Other techniques, such as twisting

the pen-clip from the tube, can cause permanent damage to the

pen-clip. Do not use pen-clips that have been permanently deformed

(loose).

Up to 50 capped sample tubes may be loaded onto the carousel. The

sample tube should be loaded onto the carousel with the

TurboMatrix brass analytical caps in place on both ends of the tube

or the PTFE analysis caps. The ATD will remove the caps when the

sample tube reaches the analysis position, and replace the caps after

the tube has been desorbed.

The front 15 positions of the carousel are available for loading. The

other positions may be accessed when the instrument is in the

Standby state, or when the instrument has been paused. Press the

Rotate button on the display. Do not rotate the tray by hand.

To load the ATD carousel while on the instrument:

1. Install the tubes on the carousel in the positions 1 to 50.

2. By pressing the Rotate button, you can move the

carousel one quadrant at a time to gain access to tubes.

Loading a Single Tube into the TD

During primary desorption, the carrier gas will flow through the

sample tube from the bottom to the top. It is therefore essential that

sample tubes are loaded with their sampling ends (grooved end)

upwards. This will ensure that the volatiles are desorbed from the

collection end of the sample tube and do not pass through the whole

length of the adsorbent bed.

WARNIN

Recently unloaded tubes can be very hot. Ensure that sample

tubes are cool before handling them

CAUTION

Never try to access a tube on the TD while it is running. The

oven heater may be activated and can cause a serious burn.