How to calibrate the current sensor (HW v4 - OpenTx)

[jjuk]

What's the process for calibrating the current sensor telemetry from a Hobbywing Platinum Pro V4 80A and OpenTx 2.3.6 ?

On the OpenTx telem screen, the current (Amps) value changes between 17.xx amps and 23.xx amps. It's jumping around wildly, with no consistent value. It updates every half a second.

My current clamp, attached to the battery, is reading a perfectly steady 21.17 Amps, with the heli on the ground, blades on, spooled up.

So i need to know how to set up the radio so that the values are consistent.

[ZeXx86]

The best is to calculate depending on consumed capacity. What you will read from the telemetry after flight and then what you will read after charging.

[jjuk]

So there is no need to calibrate the live current reading? I thought that was how the consumed consumption was calculated.

I've going through packs on the ground trying to guess what the current consumption offset should be to get a reasonably consistent value that matches the recharged mAh. At the moment RB1A Offset is set to 5A which gives me a radio calculated consumed of 1000mAh and an actual consumed when recharged of 2100mAh, so this value is still too low, i'll try 10A next. RB1V is correct when a full pack is connected.

> What value are you using for RB1A "offset" in OpenTx?

[ZeXx86]

There should be no offset configured.

Only I-Motor Shunt value should be changed so that charged/consumed capacity will match.