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.

1. Labmen instrument Limited
Tel:00852-30623001, Fax:00852-31828558
Email: sale@lab-men.com Site: www.lab-men.com
Operation instructions of Air Circulation Oven
1. 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.
2. Structure
The body of the oven is made of high quality cold-rolled steel plate, finished with electrostatic
powder spraying; the coat is hard and firm, with strong rust resistance.
The working chamber is made of high quality stainless steel sheet, with round corner modeling
which is smooth, fluent, and easy to clean.
Superfine glass wool thermal insulation material is filled between the body of oven and the
working chamber, which is with nice heat preservation. It can ensure effectively the stability,
accuracy of the temperature in the oven as well as the impact on environment.
The observation window on the door is made of double-layer tempered glass, the material
heated in the oven can be observed clearly, meanwhile, the thermal insulation is well.
Reasonable hot air circulation channel is designed in the oven, so that the temperature
distribution in the oven is more even, and the temperature rises faster; it is also equipped with
adjustable air outlet, for adjusting the inlet and outlet air volume of the oven. If the gas ejected
from the oven is with odor or poison, other pipe(s) can be easily connected to the air outlet for
ejecting such gas to the designated place.
The temperature control is fabricated by microcomputer intelligent digital technology, which is
with the functions of industrial PID self-adjustment and four-digit double LED windows indication,
the temperature control is accurate with strong anti-jamming ability. And the operation is also
convenient (please see the Operation manual of temperature controller for details).
3. Technical parameters
Dimensions of working chamber
LA-DGG-9023A LA-DGG-9053A LA-DGG-9123A LA-DGG-9203A
300*300*270mm 420*350*350mm 550*350*550mm 600×550×600mm
Number of
attached shelves 2 2 2 2
Temperature controlling range RT+10-250℃
Temperature fluctuation ±1℃
Power voltage 220V、50Hz

2. Labmen instrument Limited
Tel:00852-30623001, Fax:00852-31828558
Email: sale@lab-men.com Site: www.lab-men.com
Power consumption 500W 750W 1500W 2000W
4. Product installation and debugging
1) Do not force the glass during transportation; do not impact the body of oven either.
2) This equipment shall be placed stably on the ground when it is unloaded, the ground shall be
modified if it is not even.
3)Please do not use this instrument in the places with direct sunshine, high temperature or
moisture.
4)This instrument shall keep away from electromagnetic interference source(s), and the
instrument shall be grounded properly and effectively.
5)When this instrument works normally, the placement of the material in the oven shall not
influence the air circulation, for the evenness of temperature in the oven.
6) The power supply is AC 220V 50HZ, 3-pole socket which is 16A or above must be applied, and
with reliable grounding, no 2-pole socket can be used without authority.
7) The power line shall not be close to the back, do not put the instrument or other materials on
the power line, for avoiding damage on the power line.
5. 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.
◆ Special notice
(1) The products are tested strictly before leaving the factory, generally, no correction is needed.
If the environment is adverse or the ambient temperature exceeds the proper range upon
application, an error between the displayed temperature and the actual temperature in the oven
may be produced, if it is beyond the range of technical index, it can be corrected according to the
requirements by referring to the operation instructions of temperature controller.
(2) When the instrument is working normally, if the door is opened for a long time, the
temperature in the oven may be changed temporarily when the door is closed again, this is
normal.
(3) Caution for testing: the thermometer for testing inside the oven shall be mercury

3. Labmen instrument Limited
Tel:00852-30623001, Fax:00852-31828558
Email: sale@lab-men.com Site: www.lab-men.com
thermometer with accuracy of 0.1, and the mercury ball shall be put at the geometric center of
the oven.
6. Cautions
1) No combustible or volatile chemical materials are allowed to be put in the oven.
2) If there is abnormity, odor, smog during the operation, please turn off the power supply
immediately, the user shall not repair it blindly. The repair department of our company shall be
informed immediately, and professional personnel will be sent for repair.
3) The surfaces of the inner of the oven and the instrument shall be wiped frequently for
cleanness, and the transparency of glass can be kept well. Please do not wipe the outer surface
with acid, alkali or other corrosive solutions.
4)The power shall be disconnected when the equipment will be suspended for a long time, for
avoiding physical injuries. And it shall run for 2-3 days according to the operation conditions
regularly (generally every quarter), for eliminating the moisture in the electric appliance, avoiding
the damage on components.
www.lab-men.com
Mail: sale@lab-men.com
info@lab-men.com
Skype: lormanled