Yamato Scientific DC800 Freeze Dryers - Manual (Page 22)

18
Handling Precautions
Upper limit of inside bath temperature
Do not operate continuously when the temperature of the bath is higher than -20℃.
Vacuum grease application
If there is any dirt adhered to each connecting part of the vacuum system, the degree of vacuum
might be degreased. In this case, wipe the dirt off, and then, apply the vacuum grease.
In case that the stem tube of the vacuum valve is hard to rotate, remove the stem tube once and
apply the vacuum grease, and then install the stem tube again.
When returning to normal atmosphere pressure
Before turning OFF the vacuum pump, make sure that inside of the chamber is returned to
normal atmosphere pressure after operation finished. If turning OFF the vacuum pump under
vacuum condition, the oil inside of the pump might be flown back in the chamber. (Refer to “12.
After freeze-drying process finished, turn “VENT” face of the vacuum valve upward” in
P.15 for the procedure of vacuum relief.)
Dimension of ampoule
Use an ampoule that diameter of the connecting hole is approx. 7-9mm since the inner diameter
of the ampoule adapter is 7mm.
Eggplant flask
Use TS29 for grinding eggplant flask.