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+--- Wątek: Lk3.8 and CMP11 Pyranometer (/showthread.php?tid=2499)
Lk3.8 and CMP11 Pyranometer - georgec - 06-27-2022
Hello,
I am trying to use a CMP11 Pyranometer (see https://www.kippzonen.com/Product/13/CMP11-Pyranometer) with Lan Controller 3.8. The sensor supplies a low voltage of 0 to 20 mV in relation to the amount of incoming sun radiation. I have connected the two wire sensor to analog input 1 and I have set up the input at 5v but the value was not as expected (something like 25 (left) with 0.02 (right)). I wonder if I can read precisely such small voltages, under 20mV, with the Lan Controller's analog inputs.
Thank you.
RE: Lk3.8 and CMP11 Pyranometer - wilkxt - 06-29-2022
for INPA1 5V use gain 10 or 50
RE: Lk3.8 and CMP11 Pyranometer - georgec - 07-01-2022
Hey Tomek,
Thank you for the answer. I used the gain of 50 but the values obtained differ from the measured values with a milivoltmeter. For example for a measured value with the milivoltmeter of 6.8mv I readed with the controller 1422 in the left box respectively 1.42 in the right box. There are other calibration values that should I care? I have two boxes bellow for calibration and multiplier. Later I moved on the INPA3 for a higher precision but I obtained almost the same values.
RE: Lk3.8 and CMP11 Pyranometer - wilkxt - 07-01-2022
tray on INPA3 with vin=3.3 and gain 50