It's not you it's the meter. I'm very familiar with this meter. A few things can be happening. One, the probe is shot. They are replacable for about $60.00. Second, the internal processor could be confused. Do you have it set on the proper calibration sol. 7.0 in the mode settings. Thirdly, the worst one it could be dead. Lets put this way, I work with ph and EC meters every day, and 1 out of 5 of this exact model wouldn't even out of the packaging. Hanna needs to stop making them in third world countries. I do not recommend this meter to anyone. I just thought of something. When you go to calibrate it and it ask for the ph 7.0 put it into the pH 4.0. Sounds wierd, but I have gotten this to work. I quess it reconfuses it or something. Suggestion: Look into the Blue Lab meters. They are out of New Zealand and are distributed in the us. Very solid equipment, and you do not have to calibrate the ppm/ec on this unit. Pretty cool. Good luck

T, you're still not getting what I'm saying. lol. WiFi Adapter. Many older (and not so old) computers cannot access WiFi because they simply are not equipped to receive signals from WF routers. You buy an adapter to instantly receive signals from the WiFi router. I have 4 PC's, business and personal. Three of them are new, the other one is 11 years old. Works great, but it won't access the Internet because of not having the WiFi signal stuff already in it. It worked great with DSL. WiFi...no Internet. Hence, a WiFi adaptor is needed. It's no big deal, just a little adapter is all. Look it up.

I use a Davis Weather Station that is battery powered and solar charged. For me in S. California with lots of sunshine, this works very well for me. It will transmit information to my computer, and I also have it hooked up to my wireless router to transmit data to the web. Extremely reliable, and the folks at Davis are very helpful with questions, set up, etc. http://www.davis.com/Category/Weather_Stations/51740?referred_id=3561&mkwid=spX8zHhpn&pcrid=49924921565&kw=davis%20weather%20station&mt=e&pdv=c&gclid=CLb0uN6d3cQCFU6VfgodQL0Avw Patty S.

Yeah ... lots of critical things to consider such as initial and changing pH effects*, buffering, multivalent cations, anionic and cationic micronutrients, and zeolite like ion exchange surfaces on soil particles, which make it a play day for chemistry discussions. Then the attack and breakdown of plant and animal litter to slow release nutrients brings up neat microbiology and biochemistry aspects. Material science then decides to manipulate the situation with osmotic release and diffusion of encapsulated nutrients. And hydroponic principles try to partially play nature taking over the hydrology and lighting it up. Physics kicks ideas in there on this last aspect. For instance did you know that fluorescent light indeed glow when struck by energy (as you know), but much of the light intensity flashes through a series of distinct colors at 60 times a second? * Plants cheat neatly by manipulating ion exchange release of cationic nutrients. They knock off ammonium, potassium, magnesium, calcium and other positively charged ions by producing acid(s) to knock it off. H+ alone can cause the exchange but if the acid is on a small organic base (anion) like oxalate this organic can diffuse around and pull at the cations on soil that the plant wants and help knock it off, helping in the "weathering" breakdown of soil too. Chelators made by plants and microbes make it really interesting too. They diffuse around and hold certain critical nutrients so tightly that the plant has the choice of finding more, having a deficiency (specific nutrient starving), making a stronger chelator to take it back, and/or breaking the chelator down to free the nutrient. Now the fun parts ... the plant one might be considering is not be alone. A group of similar or different roots might be working together AND competing in that patch of soil, with different players at different depths Trees cheat and certain non woody plants cheat and go low. Moles, gophers and field mice run through this soil zone toox playing their games. No soil contact then no nutrient uptake, no root then no nutrient collection there for the plant, loss of stored nutrients and need to spend energy replacing the root. And there are smaller life forms co-inhabating the soil with the roots that are also directly or indirectly effected by soil pH. Let's put them into three classes as those that (1) don't generally effect a plant much, (2) can hurt the plant, or (3) can help the plant. Let's see ... hurting a plant is bad, unless it hurts a seriously competitive plant more. Helping a plant is good, unless it's again that serious competitor. Plants are not stand alone organisms in naturem. They live in community with microorganisms. So what if the soil pH helps support the growth of a microbe that can grow all over your plants roots? Sounds bad I know, but there are those three classes mentioned above. If your microbe is a pathogen that is bad. If it doesn't attack the plant but runs out and breaks down nearby leaf litter, great free food. It it doesn't hurt your plant but by being on root surfaces can compete with and stop pathogenic microbes from getting a foothold, great a free natural inoculation for immunity. There was a company called Eden Bioscience a couple decades ago here in the PNW that made an interesting observation. In large scale evergreen seedling production for forestry sometimes there were large scale fungal blights. Sadly alot of the seedlings all died at once in mass. However, sometimes there were a few seedlings near each other that did not succumb! In fact they looked totally healthy! When isolating bacteria, yeast and filamentous fungi from the surfaces of these plants they found that certain kinds could be grown in the lab that protected seedlings from attack, when sprayed onto them. These microbes grew best in their optimal pH range. They indeed colonized the plants, in this case leaf surfaces. And their presence did protect the leaves from pathogen attack. Obviously similar things must be happening in nature in the leaf canopy and also soil root zone of plants. So when a plant likes acidic pH 5 - 6 soil, is this just because nutrients are more available it? When I went to school, in what now seems like the dark ages, most plant physiology books focused almost solely on this. Or is it because beneficial microbes helping feed or protect the plant need that pH? My firm assumption is that both chemical and microbial pH dependent effects interact to make an optimum environment for that plant. And that some plants in the natural environment survive best, rather than grow best, at their optimal pH range. Why do many fungi sour (strongly acidify) what they are busy rotting? Niether competive microbes nor does the dieing plant tissue like it. The fungus gets more. This is exactly why you want to check the pH in the soil that you might be soon preparing for your new vegetable or herb garden this spring. Too basic, your plants starve. Too acidic, the pathogenic fungi don't starve. Then like the heirloom story of The Three Bears ... there's one pH that's just right.