I ma trying to setup the wireless AC monitor, with a single CT, to Node Red. Please advise which sensor type needs to be selected to establish communication with the lot gateway. Thank you.
Alex
Hi Alex, sure, for the AC Current Monitor single channel the sensor type is: 13 - Current Monitor.
Thank you.
Thank. Also, we have the wireless absolute gauge pressure sensor. what is the Node-Red type for this unit?
Hi Alex, it is type 26 - Pressure & Temperature (PSI).
Thank you.
Eduardo,
Thank you. Where can I find the instructions for connecting/configuring the wireless AC and Pressure Gauge to Node-Red lot unit.
Hi Alex, sure, you can take a look at this guide:
Thank you.
Eduardo,
Thanks. In Node-Red, what sensor type should we select for the wireless 3-channel AC Current Monitor.
Hi Alex, it is type 28. Let me share you the User Manual:
Thanks
Good morning Eduardo,
Noticed that the 3-phase ac monitor data is coming across as 5-digital number. For example, 78AMPs is reading 78966. Is there a way to adjust the readings to proper fort on the sensor?
Also, we are getting “0”'s on all channels when we are processing the data before transmission. Do you have a Node-Red function script to use here?
in further checking amp monitor, the amp readings appear to be incorrect. The actual line readings are 14, 15, and 14. However, the sensor data is showing 78966, 75872, 83291. Please advise. Thanks.
Hi @northstar Copy the follow JSON code.
[{"id":"87c40bd4b92d15e7","type":"function","z":"c3b309c9b4ebab8a","name":"ncd_function","func":"if(msg.topic == 'sensor_data'){\n let current1 = msg.payload.channel_1;\n let current2 = msg.payload.channel_2;\n let current3 = msg.payload.channel_3;\n\n msg.payload.channel_1 = current1 / 1000;\n msg.payload.channel_2 = current2 / 1000;\n msg.payload.channel_3 = current3 / 1000;\n\n return msg;\n}","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":370,"y":240,"wires":[[]]}]
Go to Node-RED main menu, click on Import option, and paste the JSON and click on the Import button.
Connect the function node between your Wireless Device node and the debug 11. Then click on the deploy button and test again.
Eduardo,
Looks like the function is fixing the units from milli amps to amps. But do not see how it is dealing with incorrect data.
Hi @northstar sure, let me ask you what is the AC Current Probe range? I mean are you using 100Amp probe?
we are using the 1000AMP monitor.
Hi @northstar Could you please elaborate on your current setup? Specifically, what type of machinery are you measuring?
Sharing a few photographs of the installation would also be very helpful for us to better understand your environment.
Additionally, are you using a clamp meter or a similar tool to verify the actual AC current range?
Thank you.
We are reading the amps from a large mill. We are using NCD’s 200AMP CTs on the wire 1000AMP monitor. We are measuring the actual amps using a handheld clamp meter. Based on the size of the drive motor, the amps are correct and should be between 14 to 16 amps.
Hi @northstar thank you for the information, to better understand the setup, what do you mean by this?
Are you clamping the NCD current probes directly around the motor’s power cable?
What is the operating AC current range of the motor?
Directly around the motor leads. This is not a permanent setup. We are testing the functionality of the sensor to make sure the amp readings are correct.
Thank you, this is not a expected behavior, could you share a picture of the test setup please.