STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[Omnibus]

@Omega_0,

Just some brief remarks. Tried calorimetry and without going into details will have to say that I once again observed that it cannot be done with simple means. Will see in the future what I can do about it but I don't think I'll pay too much attention to it because the methods with measuring electric parameters are incomparably more accurate. Also, the 0.001Ohm shunt arrived and I tried it at 1Hz. The results are even better that with the self-made resistors I used earlier. Also, my Keythley 2000 multimeter used in a 4-point mode recovered the Ohmic resistance of the shunt stated by the producer. This settles the calibration issue. So far so good. Now I'm waiting for the current probe to arrive to do the crucial experiment.

[Omega_0]

Thats a good news. Things are getting interesting.
Can you please post the data with shunt.

[Omnibus]

@Omega_0,

Here's the setup and the screen shot for the 1Hz experiment:

[Omnibus]

Here are the data in an Excel spreadsheet as well as the energy-time graph:

[Omnibus]

The  above data are for the shunt resistor at its 0.001Ohm value, as stated by the manufacturer. No doubt the value of the real shunt resistance in the circuit used to derive current will differ slightly although I did my best to place the probe as close to the shunt terminals as possible. Also, I measured again the resistance of the primary coil using the four-point mode of the Keithley 2000 multimeter. Now, what we need to see is a replication of the above data when using a current probe. We'll see. That may even be today if the power supply of the probe has arrived with the supplier (as I said, I'm expecting the probe itself to arrive today.)