Linkam Scientific Instruments FTIR600, Руководство пользователя

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18
Purging the Stage Method 1
There are two methods for purging the stage. Method 1 uses recycled nitrogen gas produced by the
LNP95 from the 2L Dewar.
1. Make sure the stage lid is in place and the stage door is closed.
2. Switch on the temperature programmer and set the limit to 40°C. Press the START button and
wait until the temperature limit is reached. Press HOLD to hold the temperature at 40°C.
3. Switch on the LNP95 cooling system and set it to manual mode, (see page 13) and set the speed to
maximum of 100.
4. Check that the Gas Inserts are locked into place
5. Using a finger on the left hand, block the hole in the white plastic pump connector found on the
perpendicular side to the purging tube. Still working with the left hand, pinch the narrow window
tube to block it. This action will divert all of the nitrogen gas to the Purging Tube and through the
Stage Chamber.
6. With the nitrogen gas flowing through the Sample Chamber, use a finger on the right hand to
block the gas outlet for a few seconds to allow pressure build, then release the gas. Repeat this
for a few minutes to purge the stage.
7. The purging procedure allows mixing of nitrogen gas with the residual air inside the Sample
Chamber. By pressurising the chamber with nitrogen gas and releasing it, the air inside the
Chamber is being diluted with the nitrogen gas.
8. Remove the two Gas Inserts and unblock the pump connector and window tube.
9. Change the LNP95 to AUTOMATIC mode so that the T95 automatically controls pump speed
during your cooling experiment
10. Go to www.linkam.co.uk and register your equipment to see videos of how to purge and more.
Pinch window tube
with left hand
Block hole in
Connector with finger
Purging
tube
Block and release outlet
valve with finger