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Speed values are measured at the digital input of the USB device.
 Signal input
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Selects the source for the rotation speed signal from the connected USB devices.
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 Measurand and unit
Choose between:
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Rotation speed:
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Shows the rotation frequency with the selected unit.
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User-defined:
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Available units are: Hz, 1/s, 1/min, 1/h
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 My measurand
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By multiplication with a factor the frequency signal can be transformed into another quantity, for example a track speed.
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 Characteristic
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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.
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 Minimum speed
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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.
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