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USER MAINTENANCE
CALIBRATING THE TEMPERATURE 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 1°F and should be regularly calibrated by
a third party. Never use alcohol or mercury based thermometers.
Cascade Sciences CDO 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 air temperature inside the oven
chamber. The actual air temperature is supplied by a reference sensor device. Always calibrate to the
industry or regulatory standards required for your application.
A Suggested Calibration Set Up
4 ) The oven chamber door
must be closed and latched.
3 ) Position the sensor probes in the oven with the
probe heads at least 2 inches (51 mm) from the surface
of the shelving or walls to prevent heatsinking. Secure
with non-stick, heat-resistant tape.
If using only one thermocouple, place the sensor probe
head as close to the geometric center of the oven
chamber as possible.
non-stick tape
5 ) The intake and exhaust
vents should both be closed to
ensure an accurate calibration.
1 ) Introduce the reference device
thermocouple sensor probes into the
oven chamber through the rear
access port. There should be at least
12 inches (305 mm) of probe wire in
the oven to prevent heatsinking the
outside temperature.
2 ) Carefully close the port slider.
Leaving a ¼ inch gap (6 mm) is
acceptable when wire probes are in
the port and should not interfere with
the calibration accuracy. The
chamber air pressure is close to
neutral while the oven is in operation,
limiting the exchange with cooler
external atmosphere.
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