What is the first step in cleaning the source rod shutter mechanism?

The first step in cleaning the source rod shutter mechanism is to remove the rectangular base plate. This is crucial because, without removing the base plate, access to the internal components of the gauge, including the shutter mechanism, is restricted. Cleaning the mechanism often requires direct access to ensure that debris or contamination is effectively cleared and that the mechanism operates smoothly.

Once the base plate is removed, the technician can safely assess the condition of the shutter mechanism and proceed with the necessary cleaning and maintenance steps.

Approaching the cleaning process in this order ensures safety and compliance with operational protocols, as handling the gauge without proper access could lead to improper maintenance or even exposure to radioactive components.