Reference Sensor Device - Shel lab SMI31-2 Installation & Operation Manual

INTRODUCTION
R S D
EFERENCE ENSOR EVICE
Must be purchased separately
A reference sensor device is required for calibrating the unit temperature display.
Reference devices must meet the following standards:
Accurate to at least 0.1°C
•
Temperature
The device should be regularly calibrated, preferably by a third party.
Reference
Temperature Probes
Use a digital device with wire thermocouple probes that can be introduced into the unit chamber
through the door space or access port. Select thermocouples suitable for the application temperature
you will be calibrating at.
Why Probes?
Reference readings taken outside the chamber using wire temperature probes avoid chamber door
openings. 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 conduct accurate temperature calibrations.
Never place a mercury thermometer in the unit chamber. Always use thermocouple probes.
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