Hoping I can get some advise or help. Warning, noob so please go easy.
I have managed to set up a RaspberryPi running Venus Os. I have all connected to mppt, inverter and battery monitor.
I recently purchased a GX tank 140. I have already got resistive based fuel senders from company Combi Noord. They have a range from 0-190 ohms. They have two wires.
So i have connected one wire to the 24v and one to the In as understood from the wiring diagram.
In Venus I have picked Current and not Voltage.
After doing this i only see values from 4-20ma. I dont see an option for Ohms.
So manually moving the float part of the sensor gives me readings.
HOWEVER (this is what i need your help with)
The reading range is very narrow.
The sender is 45cm long. At the bottom i see 17mA
And at the top. 20mA. I had expected 4mA at bottom of the sender shaft.
My father who has much more knowledge about electronics says that i would need to add a resistor of 250 ohms to get more range, i dont doubt his opinion. i do doubt though that Victron would make a plug and play device, the likes of the Gx tank 140, and then expect users to stick resistors in the terminals and then not write that in the supplied literature.
? Is this range, ie 17mA to 20mA, what i should expect ?
If so would not make it very inaccurate?
Is an ohms based sender intended to be used with the GX tank 140?
Is there a way to set Ohms values with the GX tank 140?
I hope someone out there knows more about this new product and can shed some light.
Thanks
