What is the first check to be performed on the CSE 102 Methane detector?

The first check to be performed on the CSE 102 Methane detector is a visual inspection for cleanliness and damage. This initial step is crucial because it ensures that the device is in good physical condition before it is used in a potentially hazardous environment. A thorough visual inspection allows the user to identify any visible signs of wear or damage that could affect the performance of the detector. Additionally, it helps confirm that the sensor is free from any obstructions or dirt that might interfere with accurate readings. By prioritizing this step, you ensure that the device is safe to operate and will function correctly when needed.