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Elithion Current Sensor Fix

I am trying to find put why I do get a voltage reading from the ammeter as
it is suppose to, but the Elithion BMS does not recognize it.

I have spent many hours diagnosing this problem and am now about to solve it.

On the previous post and video I am deturmed to solve the no charge amp (current) reading on the Elithion battery management system controller display. I noticed the readings of the battery charger shows a square wave (or heavy frequency). I wonder if that square wave instead of a smooth signal is the problem?
So and I substitute wiring a blower through the sensor pickup instead of the EV battery charger. The blower does have a smooth wave. Here is a waveform of a Hall Effect current sensor reading a 3.6 amp flow test. I turn on a 12 volt 3.6 amp blower. The spike is the usual start pulse.

Now notice the voltage of .3 is negative.

When observing the PuTTY display program, notice the source current is 24.5. That number never changes, even when a had held ammeter shows 0 or 23 amps. Once I got the input, offset, and gain correct it actually showed 0 instead of 24.5 and never changed even when charging.

The Answer is to reverse the flow through the hall effect ammeter. In other words run the charge wire the other direction. The #6 wire must receive a positive voltage signal
not a negative one like I was sending it. Even though the direction can be reversed in the Elithion software it must send a positive voltage signal. Go under --setup, current sense, source, current sensor, direction, Yes or No – to reverse direction.

Comments

Mon, 11/28/2011 - 18:24 — Anonymous

In-line current sensor is bidirectional

The Elithion in-line current sensor is bidirectional (http://products.elithion.com/2CS00xxL.php). There is no need to reverse the wires: like you said, the direction can be reversed in software.

I think your real problem is elsewhere, and you just bypassed it somehow by reversing the leads.

I think there is either hardware damage, or the sensor control wires are misconnected, or the offset setting is wrong.

Please let us help you solve this: please contact out tech support.

Tue, 11/29/2011 - 01:38 — atzi

negative voltage

Did you see where, before the direction of the sensed wire was reversed the voltage sent by the sensor was negative difference? This is the source sensor not the load sensor. I am using 2 sensors. Multiple times I tested the voltage and even used a different flow besides the 2 chargers and with a negative voltage no signal was shown on the display terminal. Positive voltage going in wire #6 on the main connector shows current.
Sensor is a Tamura L03S 50 D15. 4 wire red green white black just like the other load sensor
Maybe the controller is bad.
Do you still want me to contact you?