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
1

Signal input

 
1. Signal input
Selects the source for the rotation speed signal from the connected USB devices.
 
2

Measurand and unit

 
2. Measurand and unit
 
Choose between:
Rotation speed:
Shows the rotation frequency with the selected unit.
User-defined:
 
Available units are: Hz, 1/s, 1/min, 1/h
3

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

 
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.
5

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.