Planer Integra 750Plus, Инструкция по эксплуатации

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Operating the Integra 750Plus
Note If you are not using DeltaT, the freezer will need to have been pre-programmed
with the required freezing program before use. If in doubt, consult your supplier.
3.2.1
The procedure to follow
Start the run
1. Switch on the freezer.
2. If you are using a Dura-Tech or Dura-Lo cylinder, make sure that the liquid-nitrogen
supply tap is open.
3. If you are using a newly-filled Planer dewar and pump, switch on the pump power
supply, then wait for the orange light to switch off; this indicates that the correct
pressure has been attained. If the time to pressurise exceeds five minutes, check
that there are no gas leaks and that the dewar is not overfilled or empty.
4. If the dewar has not been recently filled, test its weight to judge whether it contains
sufficient liquid nitrogen for the intended freezing run. If it does not, fully depressurise
it and add more liquid nitrogen (refer to Maintaining a Planer Dewar in this chapter).
5. If you are using DeltaT, run the program. Otherwise, press the RUN button on the
front panel of the freezer. In both cases the light near the RUN button should go on.
6. Wait for the light to flash and for the bleeper to sound (long flashes, short beeps).
This indicates that the program's start temperature has been reached.
Load the samples
7. Load the samples into the chamber. (It is normal to load the samples at this point,
rather than before the freezer has been switched on.)
8. Attach the sample PRT to the required location.
9. Shut the freezer's door.
10. Wait for five minutes to allow the chamber to stabilise at the start temperature.
Start the freezing process
11. Press the RUN button on the front panel of the freezer to start the freezing process.
The bleeping should stop and the light should remain on to indicate that the program
is running.
Remove the samples
12. The end of the program is signalled by long beeps and short light flashes. Press the
STOP button on the front panel. The bleeping should stop and the light should go
out.
13. Remove the samples and close the freezer's door. WEAR PROTECTIVE CLOTHING,
INCLUDING BOOTS AND AN APRON, AS WELL AS GLOVES AND GOGGLES.