How should a portable gauge be secured when left unattended in a vehicle?

When it comes to securing a portable gauge in a vehicle when left unattended, using two independent physical controls is the most effective and safest method. This means implementing two separate security measures that work together to prevent unauthorized access to the gauge. For example, this could involve locking the vehicle doors and placing the gauge in a secure, locked container within the vehicle.

This approach significantly reduces the risk of theft or tampering, as it requires an individual to bypass multiple layers of security. It aligns with safety protocols and regulatory requirements for handling radioactive materials, ensuring that the gauge is protected from unauthorized access that could result in safety or security incidents.

The other options do not offer adequate security. Simply locking the vehicle does not provide sufficient protection against theft, as a vehicle can easily be broken into. Leaving the window slightly open compromises the security of the vehicle entirely, making it easier for someone to gain access. Covering the gauge with a blanket may obscure it from view but does not prevent theft or unauthorized access, leaving it vulnerable. Therefore, using two independent physical controls is the best practice for ensuring the safety and security of the portable gauge when unattended.