So I am following the instructions on my app (in the US) and it tells me to slowly pour 4oz of water into the unit and count the clicks. Did this twice and got 62 clicks both times. Following the conversion of dividing 4oz/62 clicks, I got 0.065 rounding up. The default value appears to be 0.043, which is obviously much lower and equates to roughly 93 clicks. I am very confused by the results. Even more so since the folks above appear to be working in from the same instructions in metric with 200ml which is about 6.7oz.
What am I missing here?
Rain gauge calibration
Re: Rain gauge calibration
Hi,
Today I calibrated my rain gauge with a homemade "burette". A plastic bottle (Funlight) of 0.5l and with a very thin needle a hole to the bottle cap and another hole with the same needle somewhere to the middle of the bottle (for air intake).
I filled the bottle with 200 ml water (200 g using an accurate scale). The drippings from this "burette" was very slow and the hole 200 ml took some 2 hours and 15 minutes to drip to the Netatmo rain-gauge. Also, I had aligned the Netatmo rain-gauge very horisontal.
This 200 ml water in Netatmo represent some 16.2 mm overall rainfall. From this I deduced to put for my Netatmo Reingauge calibration the value 1.44.
Today I calibrated my rain gauge with a homemade "burette". A plastic bottle (Funlight) of 0.5l and with a very thin needle a hole to the bottle cap and another hole with the same needle somewhere to the middle of the bottle (for air intake).
I filled the bottle with 200 ml water (200 g using an accurate scale). The drippings from this "burette" was very slow and the hole 200 ml took some 2 hours and 15 minutes to drip to the Netatmo rain-gauge. Also, I had aligned the Netatmo rain-gauge very horisontal.
This 200 ml water in Netatmo represent some 16.2 mm overall rainfall. From this I deduced to put for my Netatmo Reingauge calibration the value 1.44.
Re: Rain gauge calibration
After calibration, the value was 0.77 ml. Why so little? The nearby weather station shows comparable values.
Re: Rain gauge calibration
I will do the calibration as follows: recalculate the real dropped collisions into a large container per mm and then calibrate the rain gauge to match the actual collisions.
Re: Rain gauge calibration
Wondering if you had any final learnings from your calibration exercise. I have just got a rain gauge and am working my way through the same exercise. I did the 100mm calibration exercise, and in total probably poured around 400mm of water through it. In the end it registered 3.7mm. i then had the same thought, why so little? As @magnuken says above 200ml should equate to 16.2mm