# Maintenance

- Maintenance and repairs of this ATEX product must be carried out exclusively by authorised personnel, after which a no-load test and temperature measurements of hotspots (as seen in the figure) must be carried out and recorded in a report.

  After a 5 min no-load test the surface temperature must not exceed the sum of 75°C + surrounding temperature, where the surrounding temperature can vary between -20°C to +60°C.

Straight models
Angle models, in addition to hot spots in straight models.