Troubleshooting

Stabilization Period

The SFA40 requires a stabilization of approximately 10 minutes before it returns formaldehyde readings that are within the sensor's specifications. During the first minute after power-up or reset it returns formaldehyde readings of 0. After the first minute, the sensor returns formaldehyde readings but they are not considered within specification by the sensor. The SFA40 reports a status indicator byte to allow users to determine what state the sensor is in. Example 4 in the SparkFun SFA40 Arduino Library demonstrates how to poll the SFA40 for the status byte to determine the validity of formaldehyde data.

Support

If you need technical assistance or more information on a product that is not working as you expected, we recommend heading on over to the SparkFun Technical Assistance page for some initial troubleshooting.

If you need technical assistance and more information on a product that is not working as you expected, visit the SparkFun Community. The community forums are monitored by the SparkFun Technical Support Team and the SparkFun community as a whole. If this is your first visit to our forum, you'll need to create a Forum Account to post questions.