BAS Sensor Calibration Field Verification

Field verification template for comparing BAS temperature, pressure, humidity, and CO2 sensor readings against a calibrated reference instrument and documenting controller offset adjustments, deficiencies, and corrective actions.

Inspection Details and Scope

• Facility, building, and system identified
  Enter the site name, building, BAS system, and controlled area or zone being verified.
• Date, time, and inspector recorded
  Document when the field verification was performed and who completed it.
• Sensor point and controller point identified
  Identify the sensor tag, point name, controller address, and associated BAS loop or zone.
• Verification scope includes temperature, pressure, humidity, and CO2 as applicable
  Select all sensor types included in this verification.
• Sensor is accessible and safe to test
  Confirm the sensor, test port, or sampling location is reachable without unsafe access, exposed conductors, or other hazards.

Reference Instrument Verification

• Reference instrument make, model, and serial number recorded
  Document the calibrated reference instrument used for comparison.
• Reference instrument calibration is current
  Confirm the reference instrument calibration certificate or sticker is valid and not expired.
• Reference instrument calibration due date recorded
  Enter the calibration expiration or due date for the reference instrument.
• Reference instrument zero or ambient check completed
  Verify the reference instrument was checked for zero, ambient, or baseline stability before use.
• Environmental conditions recorded during verification
  Document ambient conditions that may affect readings, such as temperature, airflow, or condensation.

Sensor Readings and Offset Calculations

• Temperature sensor reading and reference comparison recorded
  Enter the BAS temperature reading and document the reference value and calculated offset in the comment field.
• Pressure sensor reading and reference comparison recorded
  Enter the BAS pressure reading and document the reference value and calculated offset in the comment field.
• Humidity sensor reading and reference comparison recorded
  Enter the BAS humidity reading and document the reference value and calculated offset in the comment field.
• CO2 sensor reading and reference comparison recorded
  Enter the BAS CO2 reading and document the reference value and calculated offset in the comment field.

Controller Adjustment and Functional Check

• Controller offset adjustment recorded
  Document the offset value applied at the controller for each adjusted point.
• Adjustment made at controller or BAS software
  Confirm the correction was applied at the controller, point object, or BAS workstation as required by site procedure.
• Post-adjustment reading within acceptable tolerance
  Verify the sensor reading after adjustment is within the site's acceptable tolerance or commissioning criteria.

Deficiencies, Corrective Actions, and Sign-Off

• Deficiencies or non-conformances documented
  Describe any sensor drift, failed comparison, damaged probe, unstable reading, or other deficiency.
• Corrective action required
  Indicate whether follow-up repair, replacement, reprogramming, or re-verification is needed.
• Inspector signature
  Inspector or technician signs to confirm the field verification record is complete and accurate.