Cascade Sciences CDO-5-2, Руководство по установке и эксплуатации

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USER MAINTENANCE
C
ALIBRATING THE
T
EMPERATURE
D
ISPLAY
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
Use non-marking heat-resistant polyamide tape
to hold the thermocouple probe in place. The
oven manufacturer recommends Kapton brand
tape, 0.5 inches width (12.7 mm), 2 mil
thickness.
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.
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.
4. The oven chamber door must be closed and
latched.
5. The intake and exhaust vents should both be
closed to ensure an accurate calibration.
2” (51 mm)