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Farm Business
Weather
Accuracy of Davis weather station “rainfall” measured?
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<blockquote data-quote="farmerm" data-source="post: 7160145" data-attributes="member: 7195"><p>I am not sure of the calibration for the Davis rain gauges, someone will known.. most have an adjustment screw somewhere.. for the type of RG I use 50ml trickled gently in to the top should result in ten tips ie 10mm being recorded. I think the Davis measures with a 0.1mm resolution but given the rainfall just 100m away could easily be 2mm more or 2mm less does sub mm accuracy really tell you anything meaningful? Make sure the RG is level as this can make a big difference. Spiders webs have been known to foul mechanisms and cause under measurement, dirt build up on the spoon or in the funnel also affect accuracy.</p></blockquote><p></p>
[QUOTE="farmerm, post: 7160145, member: 7195"] I am not sure of the calibration for the Davis rain gauges, someone will known.. most have an adjustment screw somewhere.. for the type of RG I use 50ml trickled gently in to the top should result in ten tips ie 10mm being recorded. I think the Davis measures with a 0.1mm resolution but given the rainfall just 100m away could easily be 2mm more or 2mm less does sub mm accuracy really tell you anything meaningful? Make sure the RG is level as this can make a big difference. Spiders webs have been known to foul mechanisms and cause under measurement, dirt build up on the spoon or in the funnel also affect accuracy. [/QUOTE]
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Accuracy of Davis weather station “rainfall” measured?
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