What to do if 3M Clean-Trace LM1 Measuring Instruments shows 'Swab Not Recognized'?
- DdlambertSep 3, 2025
If the 3M Clean-Trace Measuring Instruments indicates that the 'Swab Not Recognized', insert a 3M Clean-Trace Test. The issue may be because no swab was inserted, the swab is from an unknown source, or there is an instrument or swab malfunction.










