Shel lab SVAC9-2, Инструкция по установке и эксплуатации, Страница: 7 / 46

7 | P a g e
INTRODUCTION
V
ACUUM
P
UMP
The SVAC9-2 oven requires a vacuum source. The oven does not come with a vacuum pump.
Use of an oil trap plumbed on the vacuum line between the oven and the pump is strongly
recommended. The trap protects the pump from any oils outgassed during your baking
application or procedure. This extends the life of the pump. All maintenance and instructional
information should be obtained from the pump manufacturer if it was not shipped with the pump.
Mounting studs and an electrical outlet for powering a vacuum pump are installed in the cabinet
inside the base of the oven. See the Vacuum Plumbing entry in the Installation section (page 19)
for more information on plumbing.
T
EMPERATURE
R
EFERENCE
S
ENSOR
D
EVICE
Must be purchased separately
A reference sensor device is required for calibrating the oven temperature display.
Reference devices must meet the following standards:
•
Accurate to at least 1°C
The device should be regularly calibrated, preferably by a third party.
Temperature Probes
Use a digital device with potted wire thermocouple probes that can be introduced into the oven
chamber through a KF-25 port. Select thermocouples suitable for the application temperature you will
be calibrating at. The probes must be potted to seal a KF-25 vacuum port.
Why Probes?
Reference readings taken outside the chamber using wire temperature probes avoid chamber door
openings, including backfilling and re-evacuating the chamber. Backfills and openings disrupt the
chamber temperature. Each disruption requires a minimum 1-hour wait to allow the atmosphere to re-
stabilize before continuing.
No Alcohol or Mercury Thermometers
Alcohol thermometers do not have sufficient accuracy to conducti accurate temperature calibrations.
Never place a mercury thermometer in the oven chamber. Always use thermocouple probes.
Reference Device