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Re: LTSR 15
Posted: Wed Sep 01, 2021 9:08 pm
by jgu1
Wow you are amazing.
Maybe selectible for more ACS. 712 and also 758
Thank´s Jorgen
Re: LTSR 15
Posted: Thu Sep 02, 2021 4:24 pm
by medelec35
Hi Jorgen, thank you.
I have included all of The following components
- ACS7xx Component.png (114.6 KiB) Viewed 3873 times
As promised, the component should now be available via the update system.
I would recommend you set the
Acquisition cycles to at least
Fosc/64 for all the current sensing components on the Ardunio.
For anyone else interested, I have added the component to the Sensors pack, so you will need to have that enabled before you can use the component.
Re: LTSR 15
Posted: Thu Sep 02, 2021 6:38 pm
by jgu1
Hi Martin!
Thank´s, thank´s so good Martin
I have just update and prepared a testprogram. Unfortunately I have no time for test in real world today. I test tomorrow And you hear
I know that also the ACSxxx need a very stable supply.
Thank´s
Jorgen
Re: LTSR 15
Posted: Thu Sep 02, 2021 7:00 pm
by medelec35
Hi. Jorgen.
Your welcome.
I have noticed you have the Vref option set to the default AREF which is the wrong setting.
For the component to work you will need to change the Vref voltage to AVCC.
Re: LTSR 15
Posted: Fri Sep 03, 2021 8:19 pm
by jgu1
Hi Martin!
Perform some test. I only have an ACS712 5A + ACS512 20A + ACS758 50A
Two word, perfect perfect.
Work very nice.
Thank´s
Br Jorgen
Re: LTSR 15
Posted: Sat Sep 04, 2021 1:03 am
by medelec35
Hi Jorgen,
That is excellent news, thanks for the update.
Re: LTSR 15
Posted: Mon Sep 06, 2021 6:08 pm
by steve001
jgu1 wrote: ↑Wed Sep 01, 2021 7:21 pm
Powersupply in serie with my fluke and the LTSR15
Fluke A mp. ** Ltsr. Amp.
0.00 >> >> >>>> 0,00
0,50 >> >> >> >> 0, 49
1,00 >> >>>> >> 1,21
1,5 >> >>>> >> 1,45
2,0 >> >>>> >> 1,93
2,5 >> >> >> >> 2,65
3,0 >> >>>> >> 3,13
3,5 >>>>>> >> 3,37
4,0 >> >> >> >> 3,85
4,5 >> >>>> >> 4,33
5,0 >> >> >> >> 4,81
Hi ,
You should be able to get better resolution (0.2 % ) - is your psu able to supply the current required and is it stable under load ? - see the performance section in the data sheet for the calculation of the supply current required
we use these devices at work with good results - and use a dedicated supply rail for them
The shunt in your fluke could also be adding impedance to the circuit affecting the readings, do you have a shunt that you can use then measure the voltage across it ? i,e 50A = 50 mV
Steve
Re: LTSR 15
Posted: Tue Sep 07, 2021 6:40 pm
by jgu1
Hi Steve!
Yes I know Steve. My hardware setup was a quick setup with long wires and crocodile beaks, etc. At the same time, it would probably be good with some capacitive connection 0,1uF across the supply and output. I'm sure it can be done more accurately. I will try again with a better setup later. I'm sure Martin's component works properly.
Br Jorgen
Re: LTSR 15
Posted: Tue Sep 07, 2021 8:54 pm
by medelec35
One thing to mention is the resolution of of ADC will be 5/1024 = 4.88mv
As the LTSR 15 sensitivity is 41.6 mv/A then the resolution will be 4.88/41.6 = 117mA!
Note we are talking about sensitivity (resolution) not accuracy.
The only way to improve on this is to use an internal voltage reverence.
Re: LTSR 15
Posted: Tue Dec 28, 2021 4:43 pm
by steve001
Afternoon All,
Was just having a nosey at this because it pricked my interest a while ago
Can the component cope with the tapping changes ? i.e 1 turn through the device, 2 turns, 3 turns ?
Cannot see how to do this
Steve