Navigation:  Tutorials > Measurement tutorials > Frequency measurement > DEWESoft 7.0  data acquisition, processing, analyzing and storage software Channel setup

First we set up the modules. We can see two modules - one analog and one PAD module in the Analog section.

 

Now let's first set the FREQ-A module. The great advantage of the FREQ-A module is the variable trigger level circuitry, which can be set to any trigger level. In addition, it has the Find trigger button , which measures theminimum and maximum of the input signal and adjusts the signal in the middle. We can also use AC Input Coupling to cut the DC component of the signal and therefore compensate for any offsets when the RPMs are changing.

After the trigger level is set and we get some input signals, we can play with the settings. The Lowpass filter is actually a digital filter which helps to prevent double triggers (on glitches, for example). Next, we can choose the Output filter , which determines the bandwidth and the delay of the output frequency.

 

Next we click on the setup for PAD module. The basic input form changes so that we get to the PAD settings. We change the Module range (which, in this case, is more like a module function) from counter to Frequency and the click the setup for the first channel, which will be used in the measurement.

 

The channel setup for PAD is quite simple - we only have to enter the Units of measurement and the Scaling by two points - 512 Hz of input signal is in actually 1 Hz of shaft rotating speed .

 

Next we set up the Orion counter pair. The first channel is programmed for Event counting and the second counter is programmed for Frequency. Since we did exactly the same thing this in the previous chapter, I will skip it here. If you are not sure how to do it, please read the Frequency / super-counter section of the Counter tutorials.