The Model VM120 vibration meter is a battery-powered, portable instrument designed to accept any MA series accelerometer enabling vibration measurements to be taken. The meter is capable of providing RMS and peak measurements of acceleration, velocity and displacement. A switch for filtering high frequencies is provided. Both dc and ac output via a D-type socket are available for logging or for further signal analysis. Model VM120 measures peak to peak. This means that for a sine wave the value for the VM120 will be twice the size though measuring the same signal. Differences could become more apparent for non sinusoidal vibrations.