outside temperature not updating

[mikew]

Hi all
can you help me with a problem? I have a 1081 thats doing something strange
every now and again Cumulus doesn't read the outside temperature ? it just stays on a previous temperature reading
everything else appears to be updated ok
The display for the weather station has the correct temp displayed but Cumulus doesn't appear to download it.
I have put in the Cumulus ini. the patch to reduce the spikes (can't find the post again, to work out where to find it to remove it) I am using a Dell Power Edge server with windows XP SP3.
any help appreciated
cheers
Mike
http://ashley.localweatherview.net

[daj]

The display for the weather station has the correct temp displayed but Cumulus doesn't appear to download it.

Roughly how long before Cumulus catches up with the console?

[Ned]

Sounds like you've set the allowable spike too low (I use 0.5 and had no lockup yet). Cumulus won't be able to resume recording actual temps until the temp returns to a value no more than the difference between EWtempdiff and the shown value. Just stop and start Cumulus to return to normality.
The beta versions of Cumulus allow the spike values to be adjusted from the calibration page, easier than editing cumulus.ini

[mikew]

If I stop and then restart Cumulus the reading is then correct from then on until it packs up again. I haven't left it for more than six hours before a restart.
just remembered where to find the ini file. I have used 2.2
Is that too much?
cheers

[Ned]

I don't get it - 2.2°C per minute seems an absolutely huge temperature rate of change to me and would cover any real situation by a large margin. It suggests to me there's something wrong with the sensor or the data as straight lining occurs when EWtempdiff is too small, which yours is clearly not.
I just had a look at your temp graph, there's clearly weird stuff going there - does Easy Weather show huge swings too? (don't run it concurrent with Cumulus)

[mikew]

I have never run it apart from to set the units. I thought that it was unusual that everything else works ok
I have now set my ini. file to 0.5 as well and see how that goes
I sure it was working ok when it was first installed about a month ago.
Do you think it's worth trying a different USB port?
thanks

[Ned]

I don't think EWtempdiff will help, there are data issues it can't cope with. You might as well delete it for the moment.
You appear to have had a temp dive from about 20° to 12° over a very short period after 8am - presumably that wasn't real? Did you notice any temp values on the console at the time?
Your other data seems legit, so I don't think it's a USB prob.

[mikew]

The dive was from an old temp reading to the new correct current temp. The new temp was the same as as the temp on the display. It's like it hangs up on an old reading and then when I restart Cumulus everything resets back to normal reading the current temp correctly. The jump was when I restarted Cumulus. Might need a reinstall ?

[Ned]

Difficult to fathom what's going on here - dodgy sensor? ... or do you reckon the console readings have never been in error?
Are you satisfied the batteries are still good in the transmitter? I know it's only a month old, but were they fresh?
You have nothing to lose in reinstalling cumulus (backup data first). If you're feeling adventurous, get the latest beta with all the new bells and whistles, it's been rock solid for me....

[tjaliwalpa]

I have had strange readings recorded for humidity that did not make any sense. I know it is not temp, but I have been able to remove the false values in Cumulus by closing Cumulus, restoring a backup from before the event and then restarting a Cumulus. In all instances when I have done this, the values from data logger do not contain the rogue values. I am wondering if you did likewise, would the rogue temp values disappear? Worth a try.

Bob

[steve]

I have now set my ini. file to 0.5 as well and see how that goes

Unless I'm misunderstanding, you've reduced your 'maximum permitted temperature difference'. If the spike removal facility was responsible for what you were seeing (and I agree with the diagnosis that it probably was) then reducing the figure will exacerbate the problem.

You need to find out what your 'normal' maximum difference between 48-second readings is, and set the spike removal figure higher than that. If you find that your normal figure is unacceptably high, then as Ned suggests, you may have a faulty sensor. But it may also just be the norm for your location. You may also want to look at your shielding; perhaps the sun is causing the sudden temperature changes?

I don't think that you need to reinstall, that won't change anything.

[flyingscotsman01]

Hi all i am using maplin weather station i think its a rebranded watson. i am having same problem easy weather gives me exact wind as panel but culumus gives me eratic reading nearly double the real readings i have tried changeing spike values to no avail. ....can you help please. regards john

[steve]

Hi all i am using maplin weather station i think its a rebranded watson. i am having same problem easy weather gives me exact wind as panel but culumus gives me eratic reading nearly double the real readings i have tried changeing spike values to no avail. ....can you help please. regards john

Are you sure you're comparing the same values, e.g. gusts and averages? See this FAQ: http://wiki.sandaysoft.com/a/FAQ#What_d ... tations.3F