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Welcome to Weather-Above

UV1 project consists of a Oregon UVR 138 {Ultra Violet sensor) and a extra temperature sensor THC238 with a probe

Converting a UV sensor for weather station Oregon Scientific Wireless Model WMR928NX

Fig 1

Fig 2

Fig 3

1st Remove the four screws marked in red

located at the bottom of the UV sensor near battery compartment

2nd the outer cover will now be loose

pull the centre protruding plastic to separate the case

indicated in figure 1 Green Square

3rd remove the four screens first marked in red

then remove the two screws holding the sensor top indicated by Orange dots

When you remove the outer casing be careful not to lose

the rubber Gromit this may still be positioned inside the plastic

or located in the UV photodiode top

this is important on reassembly, make sure this Gromit is in place

Drill two holes indicated in figure 3

Be careful when you drill you do not damage any of the wires

on the other side of the casing

I recommend using a screened cable it is important to measure out

exactly 27 inches

Thread the cable through the bottom and through the second hole strip away

enough of the casing so there is plenty wire coming through to the top of the

sensor

I've used hot melt glue around the two holes to keep the cable in place

Please make a donation if you use this information the converting UV sensor

I appreciate it if you would sign my guestbook

Designed by M Parry-Thomas

Second stage

You need to cut-off the probe from your extra temperature sensor strip back the outer casing you're going to need a resistor

Then solder one wire from your extra temperature sensor to one end of the resistor

Please see Fig 6

Then you are left to solder one wire from the extra temperature sensor to the other wire from your UV sensor

The best way to seal everything is use a small box melt some hot melt glue into the bottom of the box

then position the resistor in the middle and position the other wire you are connected alongside

and fill the remainder with hot melt glue so you have a solid block

UV 1 Setup installation.pdf

Fig 4

Fig 6

Fig 5

You need to solder 2 wires in place

indicated by the red dots in Fig 5

Please note there are other wires

soldered to the circuit board

you need to keep them exactly in the same place

all you are doing is adding 1 wire to the indication

Markings in red

When you have soldered the 2 wires in place reassemble your uv sensor