User Manual
Version 1.0 23
Unable to maintain
vacuum within
chamber
The vacuum pump is not the correct size
for the volume within the vacuum oven
The vacuum pumping speed
should not be less than 2 Litres
per second
Various connecting flanges and pipes are
not secured or coming loose
Check all are securely fitted if
not replace applicable fittings.
The vacuum gauge is damaged.
Replace the vacuum gauge.
The oven door is not closing well.
Adjust the door pin distance.
The airproof rubber door seal is aged and
lacks elasticity.
Replace the airproof rubber door
seal
Air release valve and vacuum valve are
not in the correct place.
Manually adjust positioning
The electromagnetic valve is damaged.
(Models 6090 & 6210)
Replace electromagnetic valve
Air Leakage
Vacuum Degree
Decreased to 0.092
Mpa from 0.1Mpa
within 24 hours.
There is air leakage in various connect
pipes and flanges
Check all and replace if required
Heat incurred from the oven can distort
the shape of the
“O” ring causing air
leakage.
Screw tight the heater seat
(Located in the back of the inner
bladder)
or replace the
“O” ring.
Air release valve is not in the right place.
Manually adjust into the correct
position
Air leakage within the vacuum valve.
Replace the vacuum valve
The electromagnetic valve cannot be
closed and there is air leakage.
Replace the electromagnetic
valve.
