Hello!
Have since 2 days the Flukso in operation with 3 phases.
Basically works, but now I've found that this way too much indicating by 25-30%.
The total daily consumption is higher by 25-30% than my calibrated electricity meter.
If I, for example, in the live view a 300W lamp switch on a consumption of about 400 watts is displayed.
For a 900 watt micro wave about 1250 watts are displayed.
What can be wrong here or is the Flukso really so inaccurate? Had me at this price expected a little more. So the device is unusable.
Roman
Curious thing. These clamps have a basic accuracy of 2 to 3 %. Are the clamps tightly fit? You should hear a click when closing them. Otherwise, try moving them a bit and see what gives.
See also https://www.flukso.net/content/accuracy
I have checked the clamps once already.
They are tightly closed. I'm going to try this one little move. I do not have much room in the meter box, however.
Nota Bene: A "900W microwave" is expected to have "900W on microwave power towards the goods that you are irradiating"; as there is no ideal device, indeed the consumption at 900W microwave power is to be expected as much higher; Bosch, for example, tells for a 800W stand-alone microwave appliance an installed load of 1,27kW - so your 1250W displayed I regard as a pretty good value for 900W radiation power; to quote Bart on accuracy: The intention of the FLM is to "get a feeling on consumption" mainly by comparison; for accuracy the price I regard as rather low (see, for example http://en-us.fluke.com/products/power-quality-tools/fluke-1730-us-three-...) ...
The fact that the microwave oven requires more than stated, I can well imagine.
But that does not change the fact that the total consumption at the end of the day was 27% higher than the calibrated power meter.
I am now trying the Clamps to move a bit, and to close again. If that does not help, I also do not go on.
Hello!
Have just the clamps once again closed and moved to a different location. Has unfortunately not changed.
May occur this measurement error also by after I extended the cable of the clamps with a Cat5e by about 2 meters?
Hi Roman,
Are you getting the same inaccuracy on each phase (3 clamps, I suppose)? What are your sensor voltages on each phase set to? And what is the voltage in your area? There are different kinds of 3-phase wirings around the world, with or without N, so it's important to set it correctly.
What kind of 300W light are you measuring?
I had accuracy problems in the beginning too, now with the right settings I'm probably around 5% off - which works for me.
- Gerrit
Hi Gerrit,
I have 3 phases, and each phase has a 50amp clamp.
I am from Austria and here we have 230 volts on each phase and a neutral conductor (N).
If each phase has the same inaccuracy, I can not say.
After I send my data to pvoutput I have now for the time being generally reduces the performance to the wrong percentage in pvoutput.
The values at PVOutput are nearly identical with the calibrated electricity meter now.
In principle, I am so happy, but why the measures Flukso wrong here, I still do not understand.
So am more grateful for all suggestions and help.
Roman
Just started with the FLM, I use and a clamp and a pulse from a Landys & Gear 5235 single fase meter, 1000 pulse/kWh.
After 2 days, the consumption indicated on the meter is 42,7.
The consumption for the pulse is 21,345 and for the clamp 22,855
When I choose for Month, the reading is 19024 for the pulse and 44,055 for the clamp.
I have another FLM to install in another house (same configuration) but with a watermeter also.
I will try to export the data to my NAS to discover if the reading will be more exact than displayed on the site.
Robert.
If you are using clamps you can adjust the voltage in 'settings' to get the accuracy you need.
Baz