WS-1090 humidity issues

[doncurtis]

We have sorta discussed this issue before, but now that I have moved and literally living in a desert zone, I wonder if a, hopefully, change can be made. The WS"1090 will only read between 10% humidity and 99% humidity, it displays a double dash on the console and (apparently) reads 0% humidity to MB. Using the humidity stretch option I used to be able to handle it by simply setting humidity stretch to have - 2 be 0%. Where I lived, we almost never got < 10% humidity.

Now that I have moved to a desert zone, we very often get humidity < 10%. Almost daily in fact for the last month.

When the console reports to MB 0% RH the dewpoint drops off scale... No surprise there.

What I would hope for is when the supposed humidity drops below a user selected minimum reading (in my case 10%) that MB uses a user set value instead to calculate dewpoint.

MINIMUM HUMIDITY. 10 USE 5 TO CALC. DP

This way, DP won't drop off the chart.

I have tried to set the stretch to -10 is 0 but when MB reads the NULL or 0 (I am not sure what the console outputs when <10%) MB still calculates a way low DP

Any thoughts on a software fix for this?


Don

[admin]

I would recommend to leave the values as reported from this low budget consumer station and not to tweak them to make them look more precise. It is a budget station with not so great precision, nothing to worry, it is what it is. Just my $0.02.

[doncurtis]

Ok... This thing is several years old, perhaps 10 or so, probably time for a new toy... as in a Davis.

Thanks Boris

Don

[WA4OPQ]

Please consider the Ambient Weather WS-1900. It has a much better humidity sensor than previous models, and it works with the ObserverIP.
<The WS-1900 is the WS-2902 without built-in WiFi>