Forum help

When I use a triaxial sensor chosen reference point is the point that showed the highest vibration in the X, Y and Z. Previously I have to have made several measurements in three axes to select the reference point?

The vibration level should not be highest according to plane. The planes should correspond to the way you have the data collector setup to collect the three different accels in the triaxial accelerometer.

If you have channel 1 collecting x direction, channel 2 collecting y direction and channel 3 collecting z direction then if you position the accelerometer correctly you will collect the correct plane vibration and phase.

I think I understand what you are asking,

Aubrey

My question was whether I want to make an ODS with triaxial sensor and collector of four channels, which is the best choice for the reference in the fourth channel

Just my $.02, but you just don't use the 4th channel.

That would cut down on the chance of mixing up measurements.

Aubrey

Thanks Aubrey.
I do not understand it. What I want to know how to make a ODS with atriaxial accelerometer, a uniaxial accelerometer and a four-channel analyzer. And how to select an appropriate reference.

Thanks

I think I understand what you are talking about now. I have a very limited experience with ODS but here is my $.02.

As you are saying, setup a either a tachometer, if you want to animate at machine speed or a whole multiple, or a reference accelerometer.

If you are using the reference accelerometer. set it on a point that gives you the best signal of that frequency. Sometimes the greatest amplitude is not the best if the signal comes and goes. I was once taking a readings on a screw conveyor but placed the accelerometer on a shaker as that was the source of my vibration.

Then set your data collector up for taking triaxial measurements as the instructions say to do. Make sure you have your triaxial accelerometer oriented in the right planes. As you know if you are not careful with this the animation will be all over the place.

Sorry for the mix up,

Aubrey

Thanks for your help.Aubrey