MT11 Temperature Calibration
Overview
The MT11 sensor now supports temperature offset calibration, allowing users to apply a linear adjustment to raw temperature readings. This feature enables precise calibration against known reference temperatures to improve measurement accuracy.
Temperature Offset Setting
The temperature offset feature provides a linear calibration mechanism that adjusts the raw sensor reading by a specified offset value. This allows users to compensate for systematic temperature measurement errors and align the sensor output with a calibrated reference.
Calibrated Temperature = Raw Sensor Reading + Temperature Offset
Primary Use Cases
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Sensor Calibration: Align MT11 readings with laboratory-grade reference instruments
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Maintenance Calibration: Periodic adjustment to maintain and log measurement accuracy over time
Configuration Interface
The temperature offset is configured on the individual sensor settings interface:
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Reference reading - input the reading from a reference device.
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Raw sensor temperature reading - Displays the latest reading collected by the MT11 sensor.
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Temperature offset - Automatically calculates the offset that needs to be applied based on the difference.
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Notes - Allows user to add calibration notes for historical logging.
Historical Tracking
The dashboard will also show a complete audit trail of calibration changes:
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Sensor Reading: Raw temperature value at time of calibration
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Reference Reading: The target calibrated temperature
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Temperature Offset: Applied offset value
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Notes: User-provided calibration context and reasoning
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User: Administrator who performed the calibration
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Timestamp: Exact time of calibration change
Best Practices
Calibration Procedure
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Stable Environment: Perform calibration in a temperature-stable environment
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Reference Accuracy: Use a calibrated reference instrument with known traceability
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Thermal Equilibrium: Allow sufficient time for both sensors to reach thermal equilibrium.
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Documentation: Record detailed notes about calibration conditions and reference instrument used
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Verification: Confirm calibrated readings across the expected temperature range
Allow at least 20-30 minutes to achieve Thermal Equilibrium for glycol encased probes. Glycol acts as a thermal buffer and to get accurate comparison, ensure that the reference device is also submerged in glycol or similar fluid.
Frequently Asked Questions
When does the offset take effect?
The temperature offset will be applied only to readings collected from that point onwards. Historical data will remain unchanged and will continue to show the original raw sensor values from when they were recorded.
How long does it take for the offset to be applied?
Once you save the offset configuration, it may take up to 20 minutes for the change to be reflected in new readings. This delay corresponds to the sensor's next check-in period when it receives the updated configuration.
Do alerts use calibrated or raw temperature values?
Alerts will use the new calibrated temperature values (raw reading + offset) in place of the raw readings. This ensures that temperature-based alerts are triggered based on the corrected, calibrated temperatures rather than the uncalibrated sensor values.
Will changing the offset affect my historical data?
No, changing the temperature offset will not modify any previously recorded data. Historical readings will remain as they were originally captured. Only new readings collected after the offset is applied will reflect the calibrated values.
What happens if I change the offset multiple times?
Each time you change the offset, the new value will be applied to all future readings from that point forward. The system maintains a complete history of all offset changes, including timestamps and user information, so you can track when calibration adjustments were made.