Cascade Sciences CVAC-9.3, Installation & Operation Manual

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USER MAINTENANCE
C
ALIBRATE THE
T
EMPERATURE DISPLAY
Note:
A calibration reference device must be purchased separately. For best results, use a digital device
with thermocouple probes. The device must be accurate to at least 0.1 ° C and should be regularly calibrated
by a third party. Never use alcohol or mercury based thermometers.
Cascade Sciences vacuum ovens do not normally require calibration.
Should your SOP or quality program require calibrations, follow this
guideline.
Temperature calibrations match the temperature display to the actual
shelving temperature in the oven chamber. The actual shelving
temperature is supplied by a reference sensor device. Calibrations
compensate for drifts in the controller as well as those caused by the
natural material evolution of the sensor probe in the heated oven
chamber. Calibrate as often as required by your laboratory or production
protocol, or regulatory compliance schedule. Always calibrate using
industry or field standards.
The manufacturer recommends calibrating at the constant set point
temperature of your application or at the median of your multi-step set
heating profile.
Suggested Temperature Calibration Set Up
Continued on next page
1. Introduce a thermocouple probe from a
reference device into the oven chamber using a
feedthrough secured to the KF-25 port on the
back of the oven.
2.
Use the KF-25 clamp included with the oven to
secure the feedthrough and probe, sealing the
port.
3.
The thermocouple probe ends must be in direct
contact with the shelving. The probes may be taped
to the shelves using heat-resistant non-stick tape. Use
the tape to secure any loose wiring.
If using only a single thermocouple, place the
probe on the shelving as close as possible to
the geometric center of the chamber.
4.
SET VACUUM
Evacuate the chamber to the vacuum level of
your application or baking process.
•
The chamber must be under vacuum in order
to perform an accurate temperature
calibration.