Hello all,
I currently have a setup that we are using the 3 channel current monitor together with a 600A sensor and this monitor is sending its data to a Enterprise IIoT Gateway.
I did the initial setup on the gateway and I can see the data arriving on the debug information of node-red. This works quite okay.
I have my monitors installed on the 3 phases of my “motor cabinet” power supply.
There I have different motors I can start.
My problem is now that the data that I’m receiving on node-red does not makes any sense.
What I mean is that I get the data on channel_1, channel_2 and channel_3 with values around 1400 or 800 depending on the motor that I turn on.
My question is, do I need to divide or multiply this number?
In my example, the cable pass only once through the sensor
I see that they are integers, do I need to divide it by 10, 100, 1000 to get the correct reading?
Do I need to somehow correlate the channel value with the “sensor size”, in my case a 600A?
Thanks for your time in advance.
The data coming out of node red is in mA. in order to convert to Amp, you will need to divide by 1000.
Thanks for the answer Bhaskar, I wonder then what can be wrong. Because if I understood correctly from the documentation, the minimum current that the 600A sensor could read is 9A (1.5%).
How come that when I turn on a motor that consumes around 50A (it`s a big motor trust me) my readings are showing 1200 / 1000 = 1.2A
If I understood correctly from the documents no value under 9000 should be sent by the sensor. Am I correct?
Yes this does not looks correct.
can you share picture of setup and also data from node red.
Hey Bhaskar, sorry for taking long.
I did a review with my electrician and we found out what happened. The power supply of the cabinet is being “feed” with a two cable per phase setup.
My electrician had put the clamps around each pair and because of that the sensor was doubling the value being read.
Now if I divide the number on node-red by 10 I have a reading that makes sense, so according to my tests the sensor is reading in Amps with a precision of one decimal point.
Thanks a lot for the support and the quick responses. =)
I forgot to mention, we changed the setup to clamp just one cable per phase instead of what we did on the picture. That`s why I don’t need to divide the reading by 2 as well.
let me check node red lib.