I would like to determine the consumption of my laptop for project reasons. I have organized an ammeter that shows a consumption of 230 watts although the charger says 180 W can that be?
An ammeter shows no power and no consumption.
How accurate is your experimental setup?
So an ammeter connected in series in front of the socket and measured 1 A (even if the voltage was measured with 230V, this also varies)?
The information on the charger relates to the permitted power, if the real measured power is higher, it gets warm. Of course, the information has a bit of tolerance, but it shouldn't overheat in the long run.
Was the attempt with a completely empty battery?
In normal operation with a charged battery, consumption is certainly lower
I don't know what ammeters you know but mine shows volts / watt and the Kwh consumption o.O.
I have 200 watts on my ammeter and 20 watts on the internet display in my pc, that surprises me a little.
Maybe you mean a multifunction device. Just name the guy or take a picture. With Multis you can measure different values individually, but they only have two connecting leads / measuring tips.
That's why I don't know how to measure performance. Power is voltage x current, for this you have to take two measurements.
However, if you mean a consumption display device (but this is not an ammeter), you will also receive a displayed power, since with a circuit here current and voltage are measured simultaneously and the power value is displayed.
However, these only provide approximate values and therefore have inaccuracies - they are well suited for "home use" (what does my refrigerator use in a month?) But for monitoring energy costs.
An "ammeter" is actually a pure ammeter (single or set to amps in the multifunctional device).
The type is 9192 from Rev Ritter
I googled but can't find the device. If it is a kind of adapter plug (i.e. Measuring device on the Schuko plug on one side and socket on the other) it is an energy meter as I wrote above.
So something like this:
https://www.rev.de/DE_produkt_13705.ahtml
or something like that:
https://www.amazon.de/...074TGH5DV/
To your initial question:
If you have a watt display with 230 watts (this is the power, the consumption would then be with a time unit, e.g. Hour, i.e. 0.23 kW / h), you can do the following:
Measurement 1:
Let the laptop battery run completely empty, just let a movie run until it runs out. Connect the charger with the energy consumption meter and display the power
Measurement 2:
Fully charge Lappi and then reconnect the energy consumption meter and display the performance.
Then you have two values that you can use in your project:
- once the consumption Lappi + battery in charging mode
- once the consumption of only the Lappi
With the latter, if it is easy to do with your Lappi, you could simply take out the battery, then you only have 100% consumption of the Lappi.
Does that help you further?
Thank you for your detailed reply. I think I can do something with the answer, but I would still like to know whether my device, which I use, is an ammeter D: https://www.rev.de/de_faq_liste49.ahtml
Here is the link to the measuring device
At least it looks like your Amazon link.
Yes and no.
So not a real ammeter. According to the description in your link, it only measures voltage (volts) and power (watts). The device in my Amazon link can also measure amps on its own.
However, the power can't be measured independently, it is the multiplication of the measured voltage and measured current.
P = U x I
look here, there's also a diagram / circuit diagram below, in which an ammeter is drawn.
https://studyflix.de/elektrotechnik/elektrische-leistung-1878
The measurement is explained in the video from 03:36.
An ammeter does not measure power in watts. You're messing up something. If you measure with an ammeter you get amps, provided you measure correctly or can measure. Let's assume it is measured correctly. The value multiplied by the mains voltage by 230 V (measure the exact value) You get the power in watts.
