Manfred Weber
Metra Mess- und Frequenztechnik in Radebeul e.K.
PC Vibration Measurement System VibroMetra

Speed values

Speed values are measured at the digital input of the USB device.
Speed values

Signal input

1. Signal input
Selects the source for the rotation speed signal from the connected USB devices.

Measurand and unit

2. Measurand and unit
Choose between:
Rotation speed:
Shows the rotation frequency with the selected unit.
Available units are: Hz, 1/s, 1/min, 1/h

My measurand

3. My measurand
By multiplication with a factor the frequency signal can be transformed into another quantity, for example a track speed.


4. Characteristic
The mean value with an averaging time of 1 s and the current value are the selectable characteristics. The use of the latter is recommended for quick changing speeds.

Minimum speed

5. Minimum speed
The M312 is in general able to detect rotational speed of up to 6 1/min. But it requires 10 seconds measuring time to detect standstill. The minimum speed has to be increased in order to accelerate this process. For instance, a minimum speed of 30 1/min allows to detect standstill in 2 seconds, but then the rotational speed of less than 30 1/min is not detectable at all.