VMI VIBER X5 MKIII, Instrument Manual, Page: 40 / 121

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5.1.1. Measurement type
(Acceleration, Velocity, Displacement or mV)
Depending on choice, the instrument will integer and display the units of measurement
different.
5.1.2. Detection type
(RMS, Peak or Peak-Peak)
How the amplitude of the frequency is calculated.
For pure sine waves, the detection types are related as followed: RMS =
√2 times zero to
Peak; Peak to Peak = 2 times zero to Peak
RMS The RMS value of a set of values (or a continuous-time waveform) is the square root
of the arithmetic mean (average) of the squares of the original values (or the square of
the function that defines the continuous waveform).
Peak (zero to maximum) amplitude of the sine wave at the frequency of interest and is
calculated from the RMS value. It can be used for detection of acceleration, velocity, and
high frequency energy
Peak-Peak (minimum to maximum) amplitude of a sine wave at the frequency of interest
and is calculated from the RMS value. Use for detection of displacement; sometimes used
for high frequency energy. In the case of the sine wave, the peak-to-peak value is exactly
twice the peak value because the waveform is symmetrical.
5.1.3. HP Filter
(Setting is depending on type of measurement)
High pass filter. Sets the lowest level from which the frequency will be displayed and
calculated. If Disabled the frequency starts from zero (0).
5.1.4. LP Filter
(setting is depending on type of measurement)
Low pass filter frequency for the input signal. Sets the highest level from which the
frequency will be displayed and calculated.
5.1.5. Max. frequency
(400, 1600, 3200, 12800 or 25600 Hz)
These are the adjustable frequencies. The unit Hz is 1 period/second, equivalent to 60
cycles per minute.
The resolution depends on the frequency range and the number of lines selected.