[Barrow4491]

[attachment=991]Hi
For the last few days we have received some much needed rain and yesterday my system, Pro plus, recorded a spike of 900 or so mm, which is obviously an error in the system.
It happened before in January this year but only 70 mm or so, and the only common denominator that I can think of is that both times we had lightining activity in the area.
Does any one have any ideas as i am concerned that it corrupts my data on Wunderground and may do some damage to the system 
Thanks
Jim

[laulau]

Hi,

I had similar problem las year : Thunderstorm

Debounce is actually set to 500 ms and seems to be more stable against thunderstorm .

[hornychz]

Hi,

It could happen that a strong wind was falsely counting the flip of the cradle - in case

of use tipping bucket rain gauge - for example Fine Offset etc.

As has been said, it is necessary to make the sensor more stable against the wind

(not to measure the rain very well on the high mast)

[Barrow4491]

Hi,

It could happen that a strong wind was falsely counting the flip of the cradle - in case

of use tipping bucket rain gauge - for example Fine Offset etc.

As has been said, it is necessary to make the sensor more stable against the wind

(not to measure the rain very well on the high mast

Zdenek,
Thanks for your reply.
I use a Davis tipping bucket raingauge but it is on a short mast (1.5 metres) on the roof top but is well stayed and I don't think that wind could affect it that much ( an increase of 900 mm in a short space of time; no more than 30 minutes). I suspect it is caused by some type of interference related to the lightning.
Regards
Jim

[Barrow4491]

Hi,

I had similar problem las year : Thunderstorm

Debounce is actually set to 500 ms and seems to be more stable against thunderstorm .

Thanks for your reply. 
Could you explain "debounce" and where it is set
Thanks
Jim

[werk_ag]

I use a Davis tipping bucket raingauge but it is on a short mast (1.5 metres) on the roof top but is well stayed and I don't think that wind could affect it that much ( an increase of 900 mm in a short space of time; no more than 30 minutes). I suspect it is caused by some type of interference related to the lightning.
Regards
Jim

Surely it was!
What is the cable length between the rain gauge and the TX unit? The longer the cable the greater the possibilities of interferences caused by close thunderstorms.

Increasing the "debounce" time, as referred by laulau may help, as it in fact allows to control the minimum allowed time between each rain tip.
But before going into this way, check if its possible to shorten the cable length.

[Barrow4491]

I use a Davis tipping bucket raingauge but it is on a short mast (1.5 metres) on the roof top but is well stayed and I don't think that wind could affect it that much ( an increase of 900 mm in a short space of time; no more than 30 minutes). I suspect it is caused by some type of interference related to the lightning.
Regards
Jim

Surely it was!
What is the cable length between the rain gauge and the TX unit? The longer the cable the greater the possibilities of interferences caused by close thunderstorms.

Increasing the "debounce" time, as referred by laulau may help, as it in fact allows to control the minimum allowed time between each rain tip.
But before going into this way, check if its possible to shorten the cable length.

The cable length is about 2.2 meters maximum and could not be shortened at all.
Thanks
Jim

[werk_ag]

Thanks Jim

I just asked because some Davis rain gauges comes with a 10 meters cable, and when not necessary making it shorter could reduce the possibility of interferences. 2 or 3 meters is already a short cable.

As soon as possible I will send you by PM info about how you can change the "debounce" time. If changing it worked for laulau, maybe it also works for you.

[Barrow4491]

Thanks Jim

I just asked because some Davis rain gauges comes with a 10 meters cable, and when not necessary making it shorter could reduce the possibility of interferences. 2 or 3 meters is already a short cable.

As soon as possible I will send you by PM info about how you can change the "debounce" time. If changing it worked for laulau, maybe it also works for you.

Werk,
Thanks for that, when I receive the info I will make the  necessary adjustments and keep you informed.
It may be some time as storms are a bit of a rarity at this time of the year in our area.
Nevertheless I am keen to have my information as accurate as possible
Regards
Jim