New version 2 Fluksometer install (no sensor data)

by macmajam on Mon, 02/04/2012 - 03:11

Hi,

I have just installed a new Fluksometer and I am having trouble getting any readings from the 50 amp current clamp (values are always nan)
Account is setup and active.
The WiFi connection to the Fluksometer is working well, the globe is always lit, the heartbeat light blinks every second and the Flukso website reports the heartbeat and uptime from the device correctly every hour.
The current clamp is wired to the Flukso using the correct polarity.
I have tested using analogue sensor inputs 1 and 2 (only one active at a time)
They are set to 50 amps/240 volts for Aus.
I have measured the current on the cable using a handheld current clamp meter and the values are well within the range of the Flukso 50 amp current clamp.
When I change a sensor locally on the Flukso device the corresponding change is made on the Flukso website, name, sensor, token etc all update without any delay and the synchronisation time updates to the current time.
The last synchronisation time only ever seems to update though when I make a manual change on the device, I assume that is because it has no sensor data to send to the Flukso website.
The device is set to report its results to the Flukso server ( I have toggled this on and off)
I also have the local JSON/REST API on.
I have the Android app installed and configured, it is connecting to the Flukso API OK.
It reports sensor 1 OK!, 2 OFF!, 3 OFF! but all values are still reported as nan. Photos attached.
Update times in the app are current.
I can assume from this I am just not getting any readings on the sensor input from the clamp.
Any ideas would be much appreciated.

Regards,

James

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icarus75 | Tue, 03/04/2012 - 09:04

Hi James,

Thanks for the detailed report. I have double-checked your setup. Everything seems to be configured and working correctly on the FLM. You have now port 3 enabled as Main. If possible, could you run these checks with a multimeter (with clamp disconnected from the FLM):
1/ Measure the clamp output voltage when the clamp is connected to the live wire.
2/ Measure the input resistance of the active port (number 3 in your case). You can check port 1 and 2 as well.

Cheers,
Bart.

macmajam | Tue, 03/04/2012 - 09:31

Bart,

Thanks for the info.
I will check these in a couple of days when I get back home and let you know the results.
I quickly changed everything to port 3 before I left, just in case it worked.

Regards,

James

macmajam | Fri, 06/04/2012 - 00:31

Bart,

Here are some results for you. Clamp disconnected from Flukso.

With about 1.7 amps of load the clamp is measuring 0.2 volts dc
With about 13 amps of load the clamp is measuring 1.3 volts dc

Thats seems to prove the clamp is OK, I assume it is a 0-5 volts dc scale up to the 50 amps.

Resistance figures

Flukso off, clamp disconnected

Port 1 1.917 kilohm
Port 2 1.917 kilohm
Port 3 1.741 megohm

Flukso on, clamp disconnected

Port 1 1.917 kilohm
Port 2 1.917 kilohm
Port 3 Open circuit

I still have port 3 configured for the 50 amp clamp.
Let me know what you think and appreciate the help, thanks...

Regards,

James

icarus75 | Fri, 06/04/2012 - 09:54

Hi James,

The clamp readings are indeed ok. Ports 1 and 2 are fine as well. Port three seems to have an issue, most likely a bad solder joint.

Connect the clamp to either port 1 or 2. Double check the connection when the clamp is attached to a live wire by measuring the voltage across the port's two screw terminal inputs. Your multimeter should read a non-zero voltage.

HTH,
-Bart.

macmajam | Tue, 10/04/2012 - 10:42

Bart,

All resolved.
In the end I discovered the daughterboard was not inserted properly into the mainboard sensor socket.
The router end was 100% but the sensor end had one set of pins exposed on the right hand side.
This left the two ground sockets empty on the left.
Re-seated, checked the resistance on the ports and powered up.
All good,
Appreciated the help,

Regards,

James

icarus75 | Thu, 12/04/2012 - 12:44

Hi James,

It's good to have technical savvy users. :-)
We'll check explicitly against sensor board fitting during the next production batch.

Cheers,
-Bart.

stormshaker | Thu, 04/10/2012 - 01:08

Thanks to the forums for detailed reporting and diagnosis. I also wasn't seeing any sensor data on my new flukso. I followed through a few other threads and then opened the box to find the sensor board not connected.

stormshaker

icarus75 | Thu, 04/10/2012 - 08:21

Thanks for reporting on this thread. We've had a couple of devices in the FL02xxxxxx batch that did not have their sensor board properly inserted into the 2x7 and 2x8 connectors. We've now added some extra production tests that should prevent this specific issue from occurring in future batches.