Purpose The electrothermal constant temperature air circulation drying oven is for the laboratories of the units such as scientific research, specialty universities and colleges, industrial and mining enterprises etc to test or produce, including the application of drying, solidifying, baking, wax melting and sterilizing etc. Technical parameters Type:9070A9140A9240A9420A9620A Dimensions of working chamber(mm) 400*350*500 450*550*550 500*600*750 600*550*1300 800*600*1300 9920A 1000×600×1600 Number of shelves22233 3 Temperature controlling rangeRT+10-250 Temperature fluctuation1 Power voltage220V,50Hz380V,50HZ Power consumption 1050W1500W2100W4000W4500W 6000W Operation instructions to the product 1. Open the door of the oven, put the material which will be treated on the shelf, and close the door. 2. Connect the power supply, insert the 3-pole plug into the socket, turn the power switch at the right of the panel to “On”, at this moment, the instrument will display digits, which means that the instrument is in the status of work.. 3. Set the desired temperature in the oven by operating the temperature controller on the operation panel. 4. The instrument starts to work, the temperature in the oven reaches the set degree gradually, and the treatment will be completed after the required drying period. 5. Shut off the power supply, open the door of the oven and take out the material when the temperature in the oven is close to the ambient temperature. Caution: Please pay attention to the temperature in the oven when you open the door and take out the material, for avoiding scald.