There are a few things you need to keep in mind when applying min/max QC limits to rain and rainRate. First up the QC min/max limits are applied to both loop packet and archive record data. A temperature min/max of -40 to 60C will probably work fine for almost all folks for both loop and archive data; a temperature of 70C is equally invalid for both loop and archive data. Min/max limits for rain are a little different, as the value is now dependent on the period over which the data is gathered; for example a limit of 0 to 5mm may be fine for loop data but may be unsuitable for archive data given that archive data almost always covers a period longer than loop data. Similarly, a min/max setting for someone with a 1 minute archive interval may not be suitable for someone with a 5 minute archive interval or a 30 minute archive interval. For instance, I checked my 'top 20' archive period rain values and they ranged from 10mm down to 7mm so clearly anything less that 10mm for me would cause me to loose valid data.
Then there is rainRate. I have no intentions of debating the methods of determining rainRate but in most cases the value can vary widely so a fairly generous number is usually required. Furthermore if you have WeeWX calculate rainRate bear in mind that in a standard WeeWX install QC checks are applied before WeeWX calculates rainRate. So in such cases specifying a rainRate limit actually has no effect since there is no rainRate value to QC. Also, in such cases if your QC check has discarded the rain value then there will be no rainRate value calculated for that loop packet/archive record. Just want to point out that a little bit of thought and understanding of how WeeWX handles rain is needed before applying rain/rainRate QC limits. Gary On Monday, 1 April 2019 23:28:11 UTC+10, Johannes Ebner wrote: > > Thanks, I will give it a try. > > Am Montag, 1. April 2019 10:59:45 UTC+2 schrieb Greg from Oz: >> >> Hi, >> I got some strange rain readings as well. I put this in my weewx.conf. >> [StdQC] >> >> [[MinMax]] >> barometer = 26, 32.5, inHg >> outTemp = -40, 60, degree_C >> inTemp = -10, 80, degree_C >> outHumidity = 0, 100 >> inHumidity = 0, 100 >> windSpeed = 0, 100, km_per_hour >> pressure = 24, 34.5, inHg >> rainRate = 0, 150, mm_per_hour >> rain = 0, 2.9, mm >> I sometimes get a strange reading but not as often as I used to. >> >> On Sunday, 31 March 2019 17:47:55 UTC+11, Johannes Ebner wrote: >>> >>> Hi, >>> >>> I have now a WS3083 via FineOffsetUSB running on Weewx since January. >>> >>> Last week I got a strange hugh entry for Rain and RainRate. I was now >>> googeling and noticed that StdQC cannot be easily used for Rain and >>> RainRate for such stations. >>> >>> How could I prevent this? The value I got was somewhere more then 5.000 >>> mm. >>> >>> Br, >>> Johannes >>> >> -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
