Product Description

The VM25 has been developed, particularly, for the measurement and monitoring of vibrations on rotating machines. The purpose of such measurements is to monitor the condition of the machine in order to avoid unscheduled shut-down. Furthermore vibration measurement is carried out prior to the distribution of new machinery and subsequently to repair with a view to quality control and the issuing of product guarantees. The basis for successful machine condition monitoring is the measurement of the vibration severity over a longer period of time.

Measurements are taken at regular intervals of time and recorded. The VM25 measures and records vibration acceleration, vibration velocity or vibration displacement. The VM25 specification complies with the ISO 2954 regulations for machines that measure vibration velocity and is therefore suitable for measuring, among other things, machine vibrations in accordance with ISO 10816. In addition to vibration quantities the VM25 also measures the temperature and the rotation speed with contactless sensors. An external piezoelectric accelerometer is used as the sensor, and is provided together with the instrument.

The VM25 is fitted with an electronic measurement point detector (VMID) which enables it to take routine measurements of a large number of measurement points very effectively. In the common hierarchy of condition monitoring the VM25 is equivalent to 'Level 1'. This represents the long term monitoring of parameters with low technical and personnel requirements. For fault detection ('Level 2'), as a further step, spectral diagnostic measurements are taken, which require a large degree of expertise and sophisticated measurement technology. In the development of the VM25 value was placed on simple operation and maintenance requirements, which enable trained personnel to operate the instrument without the need of being specially qualified.