Accudata GVM-3, Руководство пользователя

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Accudata GVM-3 Ground Vibration Meter
Page Nº 23
The configuration options are as follows:
1.
Trigger locked icon . With this option selected, changing one trigger value will give all the
channels the same magnitude.
2.
Trigger unlocked icon . With this option selected, a different trigger value may be assigned to
each channel.
3.
Trigger value . Clicking this text box enables a change in the trigger value.
4.
Trigger used . This check box enables the selected channel(s) to be the trigger.
5.
Note 1 & 2 : The notes will appear in the report, useful to identify the GVM-3, job, location, etc.
6.
Pre-trigger time : Time recorded before the trigger level is reached. Only used in waveform
mode.
7.
Frequency calculation method : Use this drop box for the frequency calculation method with the
following options:
◦
Zero crossing.
◦
FFT Peak
◦
FFT 25 % of the energy spectrum (25 % of the total energy of the wave is under this value).
◦
FFT 50 % of the energy spectrum (50 % of the total energy of the wave is under this value).