First, we should pay attention to the following points when starting up:
01. When we turn on the main power switch of the freeze dryer, pay attention to keep the air pressure digital display at 110pk;
02. If we want the temperature to be displayed as the actual temperature of the cold trap, we can press and hold the master switch on the control panel of the freeze dryer for more than three seconds;
03. After starting the refrigerator, we should pre-cool for more than 30 minutes and then use it;
04. Place the sample in the sample holder, cover the plexiglass cover, and start the vacuum pump;
05. After the digital pressure display is stable, record the temperature and air pressure values ​​at any time.
Second, the matters needing attention when using:
01. Under normal circumstances, the machine shall not be used continuously for more than 48 hours;
02. Make sure that the sample is completely frozen into ice, otherwise it will cause the residual liquid to be converted into a gaseous state and produce a spray;
03. The temperature of the cold trap is about -65 ℃, which can replace the low temperature refrigerator, but in order to prevent frostbite, you must wear warm gloves to operate;
04. Whether the outlet valve is tightened and whether the inflation valve is closed, it must be checked before starting the vacuum pump, and pay attention to whether the contact surface of the plexiglass cover and the rubber ring is clean and free of dirt and sealed well;
05. Expand the surface area of ​​the prepared sample as much as possible. The sample should not include organic solvents containing acid and alkali substances and volatile;
06. In the process of freezing the sample in the freeze dryer, the temperature will gradually decrease. At this time, the sample still in the frozen state can be taken out and warmed up for a period of time, and then continue to dry, which can shorten the drying time.
Third, the matters needing attention when preparing for shutdown are:
01. The air pressure value and temperature before the freeze dryer is shut down must be recorded;
02. Press and hold the inflation valve on the control panel, and the vacuum pump should be turned off immediately;
03. Open the plexiglass cover and take out the sample until the air pressure is displayed as atmospheric pressure;
04. When you want to turn off, you should press and hold the main switch for more than three seconds, and finally turn off the main power switch of the freeze dryer;
05. After the ice in the cold trap has completely turned into water, you can open the water outlet valve, then clean the inner wall of the cold trap with a dry cloth, and finally remember to keep the large filter paper dustproof.
Welcome to Baidu search Shanghai Bilang Instrument Store to learn more about instrument details!
Bathroom Furniture,Bedroom Set Funiture,Bedroom Funiture Sets,Modern Bedroom Funiture
DUOBUY TECHNOLOGY SHANDONG CO., LTD. , http://www.dbtfurniture.com