Ph pen madness
- Thread starter oill
- Start date
Three Berries
Well-Known Member
Charlie Chan say, Man with two watches never know correct time.
Do you have some 7.0 standard solution around?
Do you have some 7.0 standard solution around?
I just did a 2 point calibration on both of them... with 4 and 7 solutions.... they both seem to test against those solutions ok... bit put them in water and they are completely different
Roger A. Shrubber
Well-Known Member
https://www.amazon.com/Dr-meter-PH100-V-Resolution-Accuracy-Measurement/dp/B00ST3VTQ4/ref=sr_1_14?keywords=dr.+meter&qid=1636670040&sr=8-14
had that one about two and a half years now, calibrated it 3 times, been dead on all three times...
had that one about two and a half years now, calibrated it 3 times, been dead on all three times...
Rurumo
Well-Known Member
I have an Apera that's been accurate for 11 months, but when it dies, I'll get a bluelab.
Roger A. Shrubber
Well-Known Member
i have an apera ec meter, i like it, they make good stuff
CatHedral
Well-Known Member
I used to favor an Oakton. But a friend turned me onto the Pen and I never looked back.
That's a good question! Are they kept in storage solution? Is one or both slow to stabilize? What's the ec of your tap? Low ec solutions have weaker ph and are slower to read. I'd try the same test with your nute solution. They are showing different temperature, but those few degrees would cause far less than .1 deference in ph.
Cleaning can help. You could try soaking in vinegar an hour or so then into storage solution for at least another hour, then check calibration again.
I rejuvenated my probe with hci acid after letting it dry out....
Some info on probe maintenance...
Storage, Cleaning & reconditioning pH electrodes and EC Electrodes
Just some basics put together for keeping everyone green. Note that Ph meters and EC meters should be stored in different liquids, and why. Keep Your pH Electrode Hydrated: If your electrode is dry, rehydrate the sensing tip by soaking the bulb and junction in an electrode storage solution for...
www.rollitup.org
Correct Handling and Care of pH meter
A laboratory may not be equipped with sophisticated instruments such as AAS, GC, HPLC, LC – MS or FT – IR but it simply cannot do without a pH meter as pH measurement is a basic requirement for all chemical and biochemical reactions and process control reactions in manufacturing industries.
lab-training.com
pH meter
The pH electrode I have been using no longer seems to work or is slow to respond. Is there anything I can do to fix it? - Technical Information Library
When testing a pH Sensor (, , ), it is best to place it into a known buffer solution. This allows you to see if...
rkymtnman
Well-Known Member
if you use kelp and fulvics (dark brown), you can't use the strips/drops right??? i guess i could try it and see what colors it makes.As long as I can still see colors I'll use drip method. I only use a meter for ppm
V256.420
Well-Known Member
rkymtnman
Well-Known Member
that's what i guessed. i have avial of the drops but haven't really used them since i've used brown stuff. lol.agreed
I use R/O water with Dyna Gro nute line. Stuff stays clear after mixing
but they were an awesome back up to a meter
They do, my next meter will be the Apera PH60, they even have a wi-fi version now. I'd like to have another good meter for verification if something doesn't feel right, plus I'd like to have the pen style. I'm quite happy with my Milwaukee MW102, but probes age and can be damaged.
Milky Weed
Well-Known Member
I picked up a blue lab metcom ph’er and E.C reader. I will likely only have to change the ph probe once a year for about $100. It’s an expensive piece of equipment, and I tuck it into bed every night so it knows I love it.