Fuses may be replaced by end users who are using the TVOC in a non-intrinsically safe application. If the application is for intrinsically safe use, using barriers, the TVOC will need to be returned to the nearest service centre.
The125mA fuse will rupture due to over voltage or power surge. Considering this, if this fuse is continuously blowing, that would suggest that the TVOC may not be being used with barriers. Please contact your local service centre for advice.