Thermal analysis & ovens
Vacuum Oven
A sealed, heated chamber connected to a vacuum pump. Lowering the pressure lets samples dry at a lower temperature, which suits heat-sensitive materials and LOD tests done 'in vacuum'.
- Pharmaceutical
- Electronics
- Chemicals
- Food
- Research labs
TROUBLESHOOTING
Common problems, causes and fixes
Vacuum not reached
Likely causes
- • Leaking door gasket
- • Vent valve open
- • Pump oil contaminated
What to do
- • Clean or replace the gasket
- • Close the vent valve
- • Change the pump oil
Pressure rises when the valve is closed
Likely causes
- • Leak in fittings or door
- • Sample still releasing vapour
What to do
- • Leak-test fittings
- • Allow longer drying
Results higher than expected
Likely causes
- • Powder lost when vacuum applied or released
- • Temperature too high
What to do
- • Apply and release vacuum slowly
- • Check temperature accuracy
Slow drying
Likely causes
- • Poor shelf contact
- • Overloaded chamber
What to do
- • Use flat-bottomed containers on the shelf
- • Dry fewer samples at a time
In LimsPulse · Calibration Management
Keep every Vacuum oven in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.