Patent ID: 8051882

Claim:
A method of monitoring a tanker truck with a monitoring system that includes a monitoring unit and a handheld data terminal, the monitoring unit of the type that includes a processing unit, a time module, and a memory, the method comprising: monitoring the tanker truck with the monitoring unit to detect an occurrence of an event, the tanker truck having multiple compartments, each compartment configured to retain a liquid fuel and including a cover, a vapor recovery fitting, a pipe in fluid communication with the compartment, and a valve assembly coupled to the pipe, the valve assembly being configured to allow loading of liquid fuel to and unloading of liquid fuel from the compartment through the pipe; in response to detecting the event, time stamping the detected event and storing the detected and time stamped event in the memory of the monitoring unit; retrieving the stored event from the memory of the monitoring unit with the handheld data terminal; and displaying the retrieved event on a display on the handheld data terminal.