Cumulus Support

I have an Ambient WS-2090 that displays 140 deg F out of nowhere. Mostly once a day, sometimes twice a day (not often). I have two consoles: Main Console connects to the PC with Cumulus (v1.9.4), the second console is remote w/o any PC connection. The WS-2090 just displays a 140 deg F spike anytime of day/night or temperature. I know it comes from the WS-2090's outdoor unit as I caught the second remote console displaying 140 deg F one day. Can I use the Spike Filter to eliminate this reading? Trouble is the 140o F reading is transferred to WX Underground for the world to see. I've set the Spike Filter to 60 deg C, and Cumulus still records 140 deg F. I have set the Spike Filter to a lesser value, but it then reports 'errors' all the time, so I set it back to 60 C and wonder what value I should set it to. Can the Spike Filter help in this case?

Mike, KC9Q

The spike removal works on the difference between two successive readings, so a setting of 60C (140F) would only filter out a spike of 140F if the previous reading was less than 0C (32F). You don't say what your normal temp readings are at the times that you get the spikes, but if the highest you could expect would be around 95F (35C), say, then a setting of 20C would remove the spikes, as the jump would be 25C, and you would be unlikely to get a change of 20C in 48 seconds in normal circumstances.

If that setting doesn't cause the 140F readings to be ignored, the most likely explanation is that these aren't the usual Fine Offset spikes, i.e. one-off sudden changes of values, and perhaps the problem is that your temperature sensor is faulty and needs replacing.