One drawback to the base station is that the tone to confirm
touches to the touch-panel display is VERY loud. You can disable
the beep completely by opening the case and cutting a wire inside, but it would be nice if the beep was
more muted when it was on (blocking the speaker hole on the back
with a blob of glue brings the tone down to a reasonable level).
The WMR-968's capabilities are best exploited by using in conjunction
with PC software hooked up the the serial port on the unit. Normally
however, the software is not included with the unit.
Unfortunately as with most weather station packages in this price
range there is no solar radiation shield included with the package,
which means you'll have to find some way to mount the outdoor
thermometer/hygrometer so the sun doesn't shine directly on it,
or your daytime temperature readings will be worthless.
I built my own radiation shield including a solar powered fan,
or you can buy a radiation shield. However buying one will set
you back at least $60 for a passive shield alone (no fan) and
up to several hundred dollars for a solar powered active shield.
Keep that in mind when considering this unit, as other units priced
higher may include solar shields.
The biggest black mark against the WMR-968 package is two separate
hardware failures I had about a year after I bought it.
The first repair I had to make was to resolder a connection inside
the anemometer due to a cold solder that broke in the middle of
winter and caused the unit to become inoperative. (A cold-soldered
connection is a poorly/improperly soldered electrical connection;
something that shouldn't happen during assembly of quality electronics.)
It took a change of batteries in the sending unit, several resets
of the base station and lots of screwing around before I determined
that the problem was internal to the anemometer. Then it took
more time to discover what was wrong, where the connection was
bad, and repair it. This was obviously not something that someone
without a bit of electronics savvy (and patience) would have been
able to fix.
Additionally this year my touch panel broke as well, having seen
only normal use. One day I realized that the set-up and set-down
and mute tone sections of the touch screen had stopped working.
These buttons are central to programming the base station's functions.
Again, through many hours of tinkering and experimentation I was
able to determine what was wrong and where to wire in two switches
to control the set-up and set-down so I could properly program
the unit. I ignored the mute tone function as I never used it
anyway.
Obviously both of the failures I suffered are major, and would
require a return and/or warranty repair. And since both happened
over a year after I bought the unit and the warranty period had
thus expired, I would have been out my money for the unit or have
had to pay for repairs or replacement had I not been able to repair
it myself. Fortunately both problems were related to assembly/connections
and not the major electronic components of the units. Regardless
the package gets bad marks for quality of electronics assembly/construction.
The weather sensors themselves I've found to be quite accurate.
I spent a fair amount of time cross-referencing my readouts with
some nearby FAA aviation weather stations as well as conventional
thermometers to check the accuracy of the WMR-968 readings. In
the process I also discovered the importance of a good solar shield
for the temperature sensor. The wireless functionality works well.
As for the physical construction of the units they are built
reasonably well. The outdoor sending units/solar panels are housed
in white plastic cases have gaskets on the backs and the cables
to keep moisture out. The indoor units are made of white plastic.
However it is a pain to replace the batteries in all the units
as the backs are held on by several tiny screws, requiring a jeweler's
screwdriver to remove.
The outdoor sending units come with a swivel head base for adjusting
the angle of the solar panels that seem a little fragile as well.
I broke the stem of one of the units trying to adjust it. Super
glue came to my rescue there!
To mount the units you can use the U-bolts that come with the
package if you have a fence or other round 1" or so diameter
tubing, or you can use screws through the holes in the base if
you're attaching to something else. There isn't any real direction
given for mounting the units though, and you're left on your own
to try to determine how and where to best do that.
That brings me to the documentation. The documentation is quite
poor, omitting some very important information needed to setup
and use the units. There are 8 pages of instructions, but they
fail to adequately explain how to properly align and position
the anemometer or many options as to how or where to optimally
mount the units. It also fails to mention that the anemometer
needs to be earth grounded to dissipate static charges that can
build up on the unit, causing it to read errantly.
The documentation is also pretty sketchy on general troubleshooting.
For instance, I discovered that a weak battery on the barometric
sensor causes errant readings, something not noted in the docs.
Overall the documentation is much too incomplete to be considered
adequate and could frustrate someone not interested in experimentation
and additional research. I can only hope that in the time between
when I bought my unit and today Oregon Scientific has improved
upon their manual...
Overall the WMR-968 offers a lot of bang for the buck, albeit
with questionable quality in the electronics assembly. But it
does offer all the standard instruments for a weather station,
and they all read quite accurately. The physical construction
of the outdoor sending units is good, except for some relatively
minor complaints, including the many small screws holding on the
backs, and the somewhat fragile swivel arms on them. The documentation
for the unit is poor however, and you'll probably have to do additional
research and experimentation on your own to get the most out of
this unit.
I don't recommend this unit for someone who doesn't want to tinker
with the unit itself. It takes some time, experimentation and
outside research to get set up and working well. But if you're
reasonably bright, handy and a tinkerer, you can't beat the price!
I consider the Oregon Scientific WMR-968 a good starter package
for a weather station, but question whether or not it will last
over the long haul...
Tim