Columbia Research Laboratories has introduced the Model VM-300 vibration meter, a general purpose vibration-measuring instrument designed for periodic routine checks of industrial equipment where portability and ease of use are required. Acceleration, velocity, and displacement measurement modes are provided, along with a number of value-enhancing features. Dual power allows the VM-300 to be powered from its internal battery in the field or from an AC adapter to save battery life in bench applications. A precision low-voltage lockout circuit prevents the VM-300 from making erroneous readings due to low battery. An automatic 10-minute timeout during battery operation will not allow the meter to drain the battery while unattended. An optional printer can be connected to the meter for permanently recording measurements. (