Hi there,
I see that in the Machinery Health Software, there's an option on Overall Mode Override which has basically five selections. None, Digital RMS, Analog, Digital True Peak and Digital Average Peak. When and where are we supposed to use that? I have been told that the selection is used on certain vibration monitoring panels. Any insights on this guys?

In the old days this was a way to override the setting of the meter, the analog used the reading from the meter that naturally gave the number closest to what the meter read, (sometimes on occasion actually the same (not necesserily in metric)) other settings gave the opportunity to give readings that was not the same as you got in the meter, very useful ? You could then actually get the same reading as some other funny gadget like a monitor panel would like to produce. Since everything else is the same since 1990 I would think it still do the same. It´s always nice to have things indicate the same even if it´s rare. Olov

Hi Oli,
I am actually working on a few vibration panels built way back in the 80's. And as you told me, different overall mode gives me a different amplitude reading but in terms of spectrum pattern wise, it's pretty much ok.
So, how is these modes related to one another in terms of calculation and does it matter which mode i choose? I normally choose the mode that gives me the closest value to what the stated on the panel though.

There is at least one new thing so I try to interpret the things, someone may read the book and correct me.
None, gives the same as the meter is set, whatever that may be, modern meters have all the modes. I always had set to analog in the meter as it correlated to simple vibrometers.
Digital RMS, would be from the spectrum collected with the freq. limits that apply, may then correlate with numbers in spectra plot.
Digital True Peak is the newbie. I have gathered it´s the actual highest peak you can find in the raw timefunction data(and or also the lowest?), if that is from the data that is the base for the current viewed FFT I don´t know, but it´s likely to be that.
Digital Average Peak should be the "normal" peakvalue panels and instruments produce that have delay time so it may not catch the "true" peak value. Only my interpretation and may not be absolutely perfect. Olov