Shel lab SRI3, Operation Manual

Page: 34 / 42

34 | P a g e
USER MAINTENANCE
C
ALIBRATE THE
T
EMPERATURE DISPLAY
Note: Performing a temperature display calibration requires a temperature reference device. Please
see the Reference Sensor Devices entry on page 7 for device requirements.
Temperature calibrations are performed to match the incubator temperature display to the actual air
temperature in the incubation chamber. The actual air temperature is supplied by a calibrated
reference device. Calibrations compensate for long-term drifts in the microprocessor controller as
well as those caused by the natural material evolution of the sensor probe in the heated and chilled
incubation space. Calibrate as often as required by your laboratory or production protocol, or
regulatory compliance schedule. Always calibrate to the standards and use the calibration setup
required by your industry requirements or laboratory protocol.
Suggested Single Point Offset Calibration Setup
Non-stick tape
recommended
1. Introduce the reference device
thermocouple sensor probe
through the chamber door space.
The door must be able to close
and latch fully.
2. Place the probe inside the
cultivation chamber with the sensor
head as close to the geometric
center of the chamber as possible.
The probe head must be at least 2
inches (50 mm) from the surface of
the shelving and walls to prevent
heatsinking. Secure the probe
heads in position using the non-stick
tape.
3. The incubator chamber door must
be closed and latched. Use the tape
to seal any exterior gaps caused by
the probe wires.
4. Place the Defrost switch on the
back of the unit in the “O” Off
position for the duration of the
calibration procedure. The defrost
cycle can impact the chamber
temperature sufficiently to result in
an inaccurate calibration.
DEFROST
2 inches (50 mm)
clearance