Yamato Scientific DC800 Freeze Dryers - Manual (Page 18)

14
Operation Method
Procedure of Operation
8. Check the vacuum gauge
• Make sure that inside of the chamber attains vacuum with
the vacuum gauge. (10Pa-20Pa)
9. Install a sample container, then,
turn up “VAC” face of the vacuum
valve
• Install the pre-frozen sample container to the vacuum
valve, then, turn up “VAC” face of the vacuum valve, and
open the path of the chamber side.
The sample container is decompressed and drying
process starts.
10. Container installation after second
piece
• When switching the vacuum valve setting from “VENT” to
“VAC”, inside of the chamber is pressurized. In case of
multiple samples processing at one time, wait (approx. 3-4
min.) till the pressure is returned, and then, switch the next
vacuum valve from “VENT” to “VAC”.
™ If installing multiple samples at one time, the degree of
vacuum decreases and the pre-frozen sample is melted.
This may cause the sample container broken.
11. End of freeze-drying • Finish the freeze-drying process after checking the sample
condition.
"VAC"
First piece
Second piece