I have an Extech pH110. Please could anyone tell me what the reference junctions does, what is that glass 'window' next to it and why and when do I need to refill it?
Sorry if these are dopey questions but the manual seems a bit lacking in informations.
Thanks, David
You refill when the liquid is mostly gone, you should have received a little bag with a wrench and some refill solution , be carful not to strip the little nut as you take it out.
As far as I know the junction completes the circuit and is what what becomes clogged with milk fats or solids and needs cleaning once in a a while .
I read from linuxboy that contact cleaner solutions that eat proteins work or you can just order the correct stuff for cleaning the probe .
Thank you Gregore.
Also I should add that when I was using my Extech 110 I would check my ph too often and before my make was finished the junction would clog and I would start getting weird readings .
If you have this problem with yours make sure to rinse in fresh water in between each sampling of ph and clean in solution after every use before putting it away .
The Extech is the best of the cheaper meters but I think designed in reliability and quality control suffers a little so they can reach that price point.
The next step up is the $200 to $300 plus range , So they have done a good job for the price.
Also if you have to much wandering of ph readings then you have issues with the probe and you should call them and get a new one sent out , I seem to recall that after 30 days the warranty kicks in and from my reading on the forums here they are great at honoring it .
Thanks again Gregore, I will persevere :)