Hi everybody!
I am using an Hall-effect switch to reed pulses from my Kent PSMT water meter, as described in [1].
It seems to work well, but I am a bit puzzled by the ratio of liter per pulse I am getting: it seems to generate a pulse every 0.84 l, which does not relate to anything -- the closest round number I can find is 6 pulses every 5 liters...
My 10+ year old meter is now sold by Elster under the V100 reference [2] where they advertise 0.5 l/pulse...
Now I don't have a real problem with that, but I would be happy if somebody could confirm this ratio in case I messed up somewhere...
Regards,
Phil.
[1] https://www.flukso.net/content/flukso-water-meter
[2] http://wwwbe.elstermetering.be/en/V100.html
Hi Phil,
Typical domestic water meters will have a meter constant of 0.5l per pulse. Which calculation made you conclude it's 0.84 in your case? What was your test setup?
Cheers,
Bart.
Bart, thank you for the feedback.
I've been a bit lazy for the testing: I just connected my hall sensor to the Flukso box, set the sensor constant to 1 and I am comparing the meter values against the number of pulses from time to time. So far it is always around 0.84 (470l for 562 pulses last time).
Now it could be that I am consistently loosing pulses, so I'll restart from where I should have started: Hall sensor on an Arduino and checking pulses with slow water flow...
No need to fiddle with an Arduino. You can use the FLM's syslog to monitor incoming pulses. Just:
Then open a tap and compare the reading on your water meter to the syslog output. If you have the impression you're missing pulses, connect a multimeter to the Hall switch's output terminals and put the multimeter in continuity mode.