In pre-freezing, to secure good evaporation
efficiency and fine drying, pour the specimen only
up to 1/3 or less for the capacity of container. This
makes icing of specimen into a form of homogeneous
film adhered to the inner walls of the container.
About Pre-Freezing
3. Pre-Freezing
Specimens in flask or freeze-dry bottle needs to be
frozen preparatorily. Container-rotating device for
Pre-Freezing, Pre-freezer PFM-1000 (optional)
is recommended.
Model Nos. Code Nos.
Notes
Cooling Temp. -45
℃
PFR-1000
Fixed to 92/110 rpm
Low Temp. Tank
Pre-freezer
Product Name
PFM-1000
197410
197420
Do not perform stationary freezing
If flask or freeze-dry bottle is frozen by stationary
devices such as ultra-deep freezer, etc., glass
container may be broken by swelling pressure
applied by freeze during freeze-drying process.
CAUTION
Be careful in handling glass containers
CAUTION
- 23 -
3) Usages of Timer
Press Timer Mode Select Switch serially
to switchover Timer Mode 1 or 2.
Mode 1: Operation time of vacuum pump is
measured and indicated automatically.
This mode is useful to calculate an appropriate
period for oil replacement for the pump.
Mode 2: Timer switch is turned on/off by stopwatch
function.
This mode is useful to measure a period of
sublimation. To turn off the stopwatch function,
press this switch for 3 seconds or more.
* Reset of Timer
Set the applicable mode with Timer Mode Select
Switch. press Reset switch for 5 seconds or more.
* Indication range for Mode1: 0 to 999 hours
(The number of last digit presents an hour)
* Indication range for Mode 2: 0 to 99 hours and
59 minutes
(The number of last digit presents 1 minute, 0 to 99.59)
hour
hour.min
Timer
Mode1
Mode2
9
9
9
9
hour
hour.min
Timer
Mode1
Mode2
9
5
9.
9
Pre-freezer
Pre-freezer device
manufactured by Tokyo
Rikakikai.
Not to hit or drop glass containers, be careful
in handling these containers.
Glass containers may cause injury if they are
broken.
