Your 157mls of water is correct. However your assumption that 0.2=2mls of water is not.
A= pi r^2 = 3.143 * 50^2= 78.57 ml represents 10mm rain etc. Therefore your are correct 20mm rain = 157mls water.
As a check I would very carefully and slowly drip (don't pour )(and not directly into the small hole above the bucket, let it run down the side of the collector), the 157mls water into the gauge. If your syringe method is correct then it should tip nearer to 45 tips. 157/3.5=44.86 times.
If it does, 20mm rain/45 tips = 0.444mm of rain represented by each tip and it is this figure you need to put into your TX Config sketch also change your Cumulus multiplier accordingly to 2.2. (0.444/0.20=2.2)
http://www.meteocercal.info/forum/Thread...figuration
A= pi r^2 = 3.143 * 50^2= 78.57 ml represents 10mm rain etc. Therefore your are correct 20mm rain = 157mls water.
As a check I would very carefully and slowly drip (don't pour )(and not directly into the small hole above the bucket, let it run down the side of the collector), the 157mls water into the gauge. If your syringe method is correct then it should tip nearer to 45 tips. 157/3.5=44.86 times.
If it does, 20mm rain/45 tips = 0.444mm of rain represented by each tip and it is this figure you need to put into your TX Config sketch also change your Cumulus multiplier accordingly to 2.2. (0.444/0.20=2.2)
http://www.meteocercal.info/forum/Thread...figuration