Air Quality Sensor Calibration

For advanced users, Verkada offers a page where customers can calibrate their sensors using reference devices.

Updated over a week ago

Verkada Air Quality sensors have an assortment of different readings that allow you to gain more insight into your building or monitor areas where video monitoring is not allowed. The data available depends on the model of the sensor that you have. Customers use Verkada sensors to monitor temperature, humidity, carbon dioxide, and other environmental conditions throughout indoor spaces to understand if they might be impacting human health or asset performance.

The Air Quality Sensor calibration interface allows customers to calibrate their sensors to whatever specifications are needed and easily download a certificate to verify compliance. The calibration interface will provide another level of actionability and verification to the rich data collected by Verkada sensors, and organizations in all industries will benefit from the specificity and simplicity of this feature.

Our sensors are factory calibrated and rated to the specified accuracy in the specification sheet for a minimum of 10 years.

The temperature and humidity sensors onboard our SV20 Series and SV11s are individually tested and calibrated. To ensure their continued accuracy, recalibration using an external reference device is necessary. For the calibration, we use transfer standards, which are subject to a scheduled calibration procedure. The calibration of the reference, used for the calibration of the transfer standards, is NIST traceable through an ISO/IEC 17025 accredited laboratory.

In this article:

Do I need to calibrate my Air Quality Sensor?

Most customers do not need to calibrate their Air Quality Sensors.

However, some customers may be required to annually calibrate their devices. With the Air Quality Sensor Calibration page, customers can now use a reference device to calibrate their Verkada Air Quality Sensors. Once calibrated, customers will be able to download a PDF certificate showing that their Verkada Air Quality Sensor was calibrated.

What Verkada Air Quality Sensors can be calibrated?

All Verkada air quality sensors, including the last-generation SV11s and the latest SV20 series sensors such as the SV21s, SV23s, and SV25s can be calibrated using the steps provided below.

What kind of calibration does Verkada offer?

Currently, the calibration page allows customers to apply a standard one-point linear calibration to their sensors. We use a single point to calculate the difference between the reference value and the raw reading to create an offset correction for the error between the two. We then apply that offset to the sensor reading.

For example, if my Verkada Air Quality Sensor raw Temperature reading is 72˚ F but my reference device shows 71˚ F, my offset is (- 1˚). Once the calibration is applied, let's say my raw reading is 76˚ F my Verkada Air Quality sensor will show 75˚ F in Verkada Command.

Who can calibrate an Air Quality Sensor?

Only Organization Admins can calibrate Verkada Air Quality Sensors. They must also be a Site Admin for the sites in which the sensors are located. If they do not have Site Admin permissions, they will be unable to view the sensors. For more information on Verkada user roles, click here.

Does setting the calibration affect past data?

No, calibrating your devices does not affect the past data collected by your sensors. Only the data from the point of calibration onwards will have the offset incorporated into it.

What kind of reference devices does Verkada recommend using?

Verkada recommends using NIST Traceable Temperature/Humidity sensors such as the Traceable Barometric/Temperature/Humidity Wi-Fi Data Logger or the Fluke - 52-260HZCAL 52-2 Dual Input Digital Thermometer with a NIST-Traceable Calibration Certificate with Data for calibrating your temperature or humidity sensors. Verkada recommends the TSI DustTrak™ DRX 8533 for PM2.5 calibration. For more information on reference devices, please reach out to Verkada support.

Calibrate a Verkada Air Quality Sensor

  1. From the All Products menu, select the Admin page

  2. Select the Privacy & Security tab

  3. Click on the Feature Manager

  4. Under the Air Quality section, change Calibration from Disabled to Enabled

  5. From the All Products menu, select the Air Quality home

  6. On the left sidebar, click on Calibration

  7. From this page, select which reading you'd like to calibrate, in this case, we're going to calibrate the Temperature reading

  8. From here you can see all of your devices, what site they are in, what their calibration status is, what the current reading is if there is an offset applied, when and who updated it as well as the next due date

    1. Device Name

    2. Site

    3. Status

      1. N/A – No calibration has been applied

      2. Calibrated – A calibration profile has been applied

      3. Past Due – The calibration profile has expired

    4. Current

      1. This is the current reading of the selected sensor reading

    5. Offset

      1. This is the offset error that is applied in the calibration profile

    6. Last Updated

      1. The date the sensor was calibrated

    7. Updated By

      1. The user who applied the calibration

    8. Due Date

      1. The due date for the next calibration is the date it should next be calibrated. The calibration procedure should be done on or before this date.

  9. Click on the Air Quality Sensor Device you would like to calibrate

  10. Using a reference device, take a reading while holding your reference device next to your Verkada Air Quality Sensor. The closer you are to the sensor, the more accurate your calibration will be.

    1. Enter this reading into the "Reference Reading" window

    2. If you see a warning "Offset exceeds range", we recommend you check your reference device and ensure you have followed the installation guidelines appropriately. This means the device is reading a value past its typical accuracy.

    3. If you see this error "Offset limit reached" you've reached the offset limit for the reading. Either your reference device is wrong or your Verkada Air Quality Sensor may not be operating properly. Please contact Verkada support.

  11. Click Refresh immediately after taking your reference reading to get the current raw reading from your Verkada Air Quality Sensor

  12. Please review your calibration profile below and click Next

  13. Please review your calibration data and optionally check the Download Calibration Report option to download a PDF of your calibration report.

  14. Select Apply to confirm your calibration

    1. A calibration event will be permanently stored in the audit log and the offset will be immediately applied to your Air Quality Sensor.

Download the most recent Calibration Certificate

Some customers may need to download a calibration certificate to provide to a third party. This may be done during the calibration process or may be retrieved at a later date using the calibration page.

Your Air Quality Sensor must have been calibrated to download a calibration certificate.

Note: Downloading a calibration certificate creates an audit entry in the org-wide audit log.

To download an Air Quality Sensor's Calibration Certificate follow these steps:

  1. From the calibration page, select a reading

    1. In this case, we're going to look at a sensor's Temperature calibration history

  2. Hover over the device and find the download button (downward arrow) on the far right

  3. Select Download Calibration Report

  4. Verkada Command will process your request and a browser download of the Calibration Certificate will be initiated once the file is ready

View Calibration Log and download past Calibration Certificates

Verkada stores all of the different calibration events and certificates, as the calibration history, for each device. This means that every action is permanently logged:

  • Applying a calibration

  • Resetting a device to factory calibration settings

Note: Downloading a calibration certificate creates an audit entry in the org-wide audit log.

To view a device's calibration history follow these steps:

  1. From the calibration page, select a reading

    1. In this case, we're going to look at a sensor's Temperature calibration history

  2. Hover over the device and find the three vertical dots on the right-hand side of the table

  3. Click on the three dots and select View Calibration History

  4. This table shows the following:

    1. What event took place:

      1. Factory Reset

      2. Calibration

    2. The date on which the event occurred

    3. The offset that was applied

    4. The reference reading that was taken during that calibration

    5. The certificate number for that calibration

    6. The user who made the change

  5. If you'd like to download a previous calibration certificate:

    1. Hover over the row

    2. Find the download arrow on the far right and select Download Calibration Report

Reset Verkada Air Quality Sensor Calibration back to Factory Defaults

If a calibration profile is no longer needed and you'd like to use the factory calibration, or you'd like to reset to factory calibration before a new calibration, Verkada Command allows you to do so.

Your Air Quality Sensor must have been calibrated to

be able to reset it to factory defaults.

Note: Resetting an Air Quality Sensor back to factory calibration settings will create an entry in the sensor's calibration history.

To reset an Air Quality Sensor Calibration back to Factory Defaults follow these steps:

  1. From the calibration page, select a reading

    1. In this case, we're going to look at a sensor's Temperature calibration history

  2. Hover over the device and find the three vertical dots on the right-hand side of the table

  3. Click on the three dots and select Reset Factory Settings

  4. Confirm you'd like to reset the factory settings for the appropriate device by selecting Reset

  5. If successful you will see a banner that says Factory calibration reset complete

    1. If unsuccessful, please contact Verkada Support

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