[SR123]

Hi,

Thanks for the info on software settings, but before I delve into that I decided to do some more experiments

I found this info on the UVM30A sensor
   

This morning was cloudy / overcast, I measured the voltage at the tx pcb terminals for the UV - 174 mV
This according to the above graph is less than 1 UV - the rx showed 2.8 UV

This afternoon the sun came out, I measured the voltage and got 400 mV
This should correspond to 3 UV - the rx showed 6.6 UV

To me something isn't quite right, the readings from the sensor seem to be correct. Any Ideas?

Thanks for clearing that up

Today I recorded a maximum UV of 7, which is too high. The maximum should have been 5.
What would you recommend I do?

Thanks, Steve

Hi,

According to specs, the UVM-30A tolerance is +- 1UV Index.
You can also try to do some adjustments on the software side.

On the receiver software, RX_TX tab, find this code (around line 360) :
 

Code:

#if (UV_SENSOR == 1) // --- UVM-30A
IndiceUV = ((RX_Data[2] * 12.0 * (100.0 / UV_Transmission)) / 1024.0);
#endif

Try lower the "12.0" value.

Rgs.
Werk_AG