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I should have been an artist! Just kidding but I think my start up screen for the Ammo Can Meter looks pretty good. You have your transmission line tower set against a full moon and a black out screen. The meter will give you complete power system and harmonic metrics (see previous posts). I will pr...

The Ammo Can Meter! Pictures show progress in installing the MOD54415 based AC meter in a surplus ammo can. Open the lid and you will see the front panel shown (I have to add an Ethernet connector but I am waiting for the 1 foot Ethernet extension to get here so I can measure it). Other pics show th...

And - since it is so damn accurate I added a Watt Hour feature! The bottom picture shows the updated web browser screen shot - it now has all the harmonics and I added the WH section on the bottom. That gives you current UTC time and the reset time of the watt hour meter. The top picture shows perfo...

Pictures of distortion calibration test vs the Keithley meter. I use a diode network with a potentiometer to introduce (mostly second harmonic) distortion and compare to the Keithley. Works great - very accurate voltage, current, phase angle, Watts, Vars and now - THD percent and harmonic voltages a...

Some pictures of the latest screens. In the picture where V2 (second harmonic voltage) reads 119+ I set the test source to output the second harmonic.

In one cycle! I got the part for the Epoch 10 test source and finally tested my FFT based algorithm that, within one cycle, gets the voltage, the current, the phase angle and the harmonics thru the 7th for both the voltage and current. In the pictures the results appear in the right column of the s...

This may not look particularly exciting but, in the name of efficiency, I created a new AC signal algorithm that is an FFT (Fast Fourier Transform) modified to produce a raw angle of the fundamental as well as the amplitude of the fundamental. The difference between the angles of two channels give o...

Netburner in an ammo can? I note that enclosures seem oddly sized and overpriced - so I am starting the Netburner MOD54415 in an Ammo Can Movement. I am going to put this meter in one, you just open the lid and there is the front panel with the display and so on - but you could also install relays f...

Added buttons to toggle between the vector display and power quality FFT modes. It will also be able to record (on a flash drive) the highest voltage, the lowest voltage, and the highest THD for each 15 minute interval.

Got a lot done today. The video (link below) shows calibration of the MOD54415 board power quality function vs, the Keithley lab standard. The board reads about 0.02% THD high at ~0.10% THD and about 0.03 low at 12.17%. I used a diode resistor network to create distortion in the signal applied to th...