WARNING
The CLD 780 TR may only be switched on when it is connected to a vacuum pump and adequate
vacuum is achieved. In addition the vacuum tubing from the analyzer to the pump must be abso-
lutely light-tight and of adequate diameter (at least 16 mm). Ideally, the vacuum pump is switched
on, with dry air cartridges connected, 1 hour before the instrument itself and, after use, left running
30 – 60 minutes after the CLD 780 TR is switched off.
Similarly, it is extremely important that:
– the dry air inlet is always connected to an indicating dryer cartridge with unused drying capacity
(also, if possible, when the instrument is switched off).
–the O
2
inlet is always connected to an adequate source of dry oxygen (at 750 to 1100 mbar
abs) or dry air (at atmospheric pressure).
– the sample is passed through a particle filter (pore size 5 µm or less).
When bringing the CLD 780 TR into operation for the first time, or after an extended shut-down with
the vacuum pump and/or dryer cartridges removed, run the vacuum pump, with dry air cartridges
connected, for several hours before switching the instrument on.
If these precautions are not observed then the consequences may be destruc-
tion or damage to the photomultiplier tube through exposure to daylight, or by
the formation of condensation.
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