Across International AccuTemp Series, User Manual

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ACCUTEMP SERIES 480°F VACUUM DRYING OVEN USER’S MANUAL
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4.1. Your oven should be placed on a sturdy platform that is approximately 30 inches off the ground,
or the same distance your building code requires for a water heater.
4.2. Best practices for vacuum operations:
a. Place all shelves that you will use inside oven, make sure vent port, vacuum port are closed, and
oven door is closed securely.
b. Connect vacuum pump with KF25 stainless steel bellow, clamps and o-rings.
c. Turn on your vacuum pump.
d. Open vacuum port on the oven and watch the vacuum level on the vacuum gauge.
e. When desired vacuum level is reached, close the vacuum port FIRST, and then turn off your
vacuum pump. (It is a good idea to leave the pump on at all times during the heating process, and
then for an additional 30 to 60 minutes afterwards, to allow the pump to clear out any moisture
that may have been pulled into it during the vacuuming process.)
4.3. Guidelines for using the vacuum oven
a. Put your sample into the oven. Close the door securely, then close the vacuum release, open the
vacuum valve, and turn on the power to the vacuum pump to start the purging process. When your
vacuum level inside the oven is where you want it to be, close the vacuum valve first, then turn off
the vacuum pump.
b. Turn on the oven and set your target temperature. Temperature in the oven will start to rise and the
heating indicator will blink. Usually, the oven enters into temperature-dwelling mode within 30 to
120 minutes, depending on your target temperature.
c. If your target temperature is low, you can set your temperature at two intervals to minimize
temperature spikes. For example, if your target temperature is 100°F, the first target temperature
value can be set to 90°F, and when temperature reaches that point, set the temperature one more
time to 100°F. By doing so, temperature overshooting can be reduced or prevented and
temperature dwelling state can be started as soon as possible.
d. The length of drying time should be selected based on the humidity level of your sample. In case
drying time is long and vacuum level reduces due to off-gassing, etc, it is necessary to purge the
oven again to restore desired vacuum level. (Make sure your vacuum pump can work at your target
temperature when doing this).
e. After the drying process is done, turn off the oven, open the vacuum release valve, then open the
door. It is possible that the sealing gasket may become stuck to the door glass, causing the door to
not open easily. If this happens, wait a few minutes until the gasket restores itself before trying to
open the door again.
We recommend using our T series cold trap in between your oven and vacuum pump, to
protect your pump from damage caused by the extraction of solvents or other gases.
4. PREPARATION