Operating Instructions DFO/DFI Series Mechanical Convection Ovens/Incubator
13
Keep clear of inlets of bottom plenum and outlets of back plenum for the circulating
hot air. Excessive hoarding of specimen or blockage of the air circulating may cause
localized temperature distribution and triggering the over temperature protection
device resulting in hazard of overheating and over temperature!
Bare wire resistance heating device is incorporated for lower heating. Do not put
specimen with high humidity or dripping water into the oven. Never try to insert
conductive wire or similar material into the inlet openings of the bottom plenum.
Never put specimen or apply pressure directly on top of the bottom plenum.
Disconnect the power supply immediately and clear the foreign item if any conductive
particle penetrates into the bottom plenum!
Regular check of the air tightness of the door seal is necessary for efficient and safe
operation of the oven. Intervals of 3 months for normal use, or the first time
powering up after repairing or standstill for long period, are recommended. Refer to
4.1 for detailed procedures.
49
