FNIRSI GC-01: HV, power consumption vs. PWM parameters

[PlasmaHH]

The setup

So I took my GC01, a DMM, a PSU and a USB cable to do the following measurements:

• Loop over HV Profile frequency via the devices serial port (1kHz to 25kHz in .5kHz steps)
• Loop over HV Profile duty cycle via serial port (0.01 - 0.99 )
• Measure the used current
• Measure the GMZ voltage

Resulting voltages

I took excel to plot the resulting voltages in a surface plot. As the target voltage of my GMZ (J321) is 400ish thats the light green part. X-Axis is Duty Cycle, Y is Frequency and Z (Color) is the voltage.

Since excel "2D" surface plots are really "3D just from above" you can see a glimpse some interesting steps behaviour, possibly an interaction of the pwm setting not quite fitting the frequency well and aliasing each other.

Resulting power consumptions

Just like the voltages I plotted the power consumptions. As you can see in the area where duty cycle gets higher and the voltage reaches very high levels, but then breaks down totally (upper right corner) the power consuption becomes really high.

But what became evident for me is that the power consumption in the range from 1kHz to 25kHz is basically the same for the 400V target. It ranges between 40-42mA give or take

The raw data

If anyone is interested I could make the raw measurement data available too

A feature request maybe

One thing I wanted to do after all this is to set the HV profile with some value I chose from my readings, but in the menu there was only a limited set of values available.

Setting it via the serial port will not be saved on device shutdown, so the feature request would be to somehow make things work together well, the menu with the values as well as saving it with the value set via the serial port.

Maybe the gui part could have some component that can input an integer/float by left-right cycling through the position and up/down to cycle through the digit value there, so there is no need for endlessly scrolling lists (the duty cycle list has quite a few entries)?

That way any value entered via the serial port can stay compatible with those entered via the gui.

[Gissio]

Great work!