Alaxa Water meter

Post by **Kroonen** » Mon Dec 31, 2007 4:07 pm

This is my watermeter, as you see you can read it;-)

here is the complete waterput with alaxa meter on the left

Post by **Bwired** » Mon Dec 31, 2007 5:32 pm

Right thats a clear one

It is strange, let it run for a while and see what the difference is within a couple of weeks

Post by **Digit** » Mon Dec 31, 2007 8:22 pm

How fast can you poll the counter?
If fast enough to register every pulse seperately, you could find out if the water meter counts more than 1 pulse where only 1 is expected due to polling rate & max water flow. ("denderen", the counter is very fast/sensitive to that)

Post by **Kroonen** » Tue Jan 01, 2008 2:35 pm

Well first of all, hapy new year, and a great domotica/HA year.
Yesterday evening I wasn't home, and still used 6.0 liter water from my meter. The only thing that was on was the central Heating, on the same group as the watermeter power.

I have looked, and noticed that de counter doesn't need external power. When I use the power of my pc, it is also working. So I decided to use this power, and also connect directly so serial port. Also put an elco on the power, so if there comes some noise it won't affect I hope.

I let know if this is the solution

Richard

Post by **Kroonen** » Tue Jan 01, 2008 4:24 pm

Well I think it is not working.... again.. I think there is a problem with de serial 1-wire adapter.

I think digit/ bwired, you must put external power to it right?? I think that is the problem. I get some strange noise.. Digit you offered me to test it with an external DS9097U-S09. Is the offer still possible??

Post by **Digit** » Tue Jan 01, 2008 4:29 pm

Ofcourse. Just send me a PM with the delivery address.[:)]

Post by **Bwired** » Tue Jan 01, 2008 9:04 pm

Hi Richard,
You are right, you have find somehow there. Some noise, or something in the way it's gets it power. Did you try different external powersupply's?

I use the TAI8586 1-Wire double optocoupled counter module without any additional (direct) power and more then 30 meters of cable in between. My module gets it power (parasite) from the 1-wire controller. Works without a problem.

Based on the Dallas Semiconductor DS2423 the TAI8586 1-Wire double counter module track two diferent series of events. MCT6 optocoupler isolates the 1-Wire network from the measured process. The module contains a 3v Lithum battery to count events even with the 1-Wire bus unconnected.

Post by **Kroonen** » Tue Jan 01, 2008 11:06 pm

Yes it tried different power supply's, even one made with an lm 7805. But than i have 2 different powers, one from 1 -wire, with a 'ground' and one from the external power power supply, and that causes problems. I be testing later this week, the one from digit, and and than I hope this will work.

Post by **Kroonen** » Tue Jan 15, 2008 11:25 am

Well i tried it with a ds9097u and also not 100%.

I noticed that when you use external power you must disconnect something

http://www.vpx.nu/dokuwiki/doku.php?id=hardware_bf53x

As is see on aag elektronica, the counter has 2 optocouplers on de counter, so then they don have that problem.

any idea how to do it with a standard ds9097?

Ricahrd

Post by **Kroonen** » Thu Feb 28, 2008 10:49 pm

Hi,

I finally bought an tai8586, form aag and hopes that solves the problem.

Now i want to connect it to my alexa water meter. I only found this schema http://www.aagelectronica.com/aag/media/TAI8586-OC.gif

I see rj12 connector is the signal input form alax the also on, of should that put on the print connectors??

I have +5v and gnd form external power, one wire data and ground, and pulse form the watermeter

rergars richard

Post by **Bwired** » Thu Feb 28, 2008 11:30 pm

The pulsecounter from the Alaxa watermeter should go on J11 or J27. The RJ12 is for connecting to your 1-wire network.

Post by **Kroonen** » Fri Feb 29, 2008 9:45 am

Antoher question about j11. I put signal on j11 pin 1 and the gnd(-) from external power on pin 2?

Post by **Bwired** » Fri Feb 29, 2008 10:43 am

They changed the module?
this is my module without opto coupler all other components are the same.

The optocoupler connected to J11 needs + on pin 1 and - on pin 2. So I think you need to make a construction combining your powersupply with the pulse output of the Alaxa. This is something I did not need to do in my setup.

Post by **Digit** » Fri Feb 29, 2008 12:17 pm

Richard,

Read this:
http://board.homeseer.com/showthread.ph ... 657&page=4
Also someone that is using 'your' counter. This will give you an idea on how to connect power and water meter to the counter. It's not completely equal to your setup, but it should help you enough. Look at the attachments, and register if needed.

Post by **Kroonen** » Sat Mar 01, 2008 3:30 pm

Well it is working, it counts, now I'm going to check it, this one is more correct than the one from hobby-boards.
I'm positive because last hight it didn't count pulses, what is correct
see www.kroonen.eu (waterverbuik)

I wrote the numbers from the watermeter and counter, I let you know the results about the accuracy.