Hello I have brand new just opened ph 7 and ph 4 Growth Technology brand buffer solutions showing 9.18 for the ph 7 solution and 6.86 ph for the ph 4 solution. Wtf? It's my first time calibration a ph meter but I have noticed that these 2 numbers are the exact numbers of other ph buffering solutions, so have these solutions been mislabelled at the factory or something? Thats too much of a coincidence isn't it or am I missing something here? Thanks for any help.
Ph buffer solution problems
- Thread starter Duhh
- Start date
The 4 is reddish the 7 is clear
Yes for sure. It's a simple put in solution and press the calibration button for 5 seconds then it gives the reading says done. Seems fool-proof
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How do I do this? It's a blue two button pancellent meter.
but why are the numbed the exact numbers of other calibrating solutions ?that seems like not a coincidence or a misreading doesn't it? 9.18 and 6.86.
ProPheT 216
Well-Known Member
You are testing the solution on a uncalibrated meter. Try using the calibration solutions to calibrate the meter. Stop testing the solution...
I'm using the calibration solution to calibrate the meter. I put it in the solution press and hold calibration button it's then gives the reading and says done.
Fangthane
Well-Known Member
I've had enough shit luck with them that I'm basically anti-pH meter nowadays. But I'm thinking Pancellent is one of the types available for $15-ish on Amazon. Some people have managed to have good luck with them, but for the most part I think they're generally considered garbage.
EDIT. Here's what I've been using for the past few years. Never needs calibration.
Yeah it's not expensive but what about the readings they're not random, 9.18 for the 7 and 6.86 for the 4, those are definitely other ph calibrating solutions numbers. But in the mean time can I just subtract the difference to get an accurate reading in my feed? But what number would I subtract they both different? 2.18 difference and 2.86.
Yes you're not the first person I've read saying use ph paper test strips maybe I will.
In coco
Fangthane
Well-Known Member
I see. Yeah, pH matters in a big way. Honestly, I'd just go with the test solution and forget about the low-end meters.
Hollatchaboy
Well-Known Member
Or get a quality ph meter.
OP, you're ph meter sounds pretty far out of range. You could try soaking the probe in storage solution for a couple days, and re calibrating, but I doubt that's gonna help. Cheap meters don't last long.
OP, you're ph meter sounds pretty far out of range. You could try soaking the probe in storage solution for a couple days, and re calibrating, but I doubt that's gonna help. Cheap meters don't last long.
Fangthane
Well-Known Member
I'm assuming this one:
Pancellent Water Quality Test Meter TDS PH 2 In 1 Kit 0-9990 PPM Measurement 2% | eBay
[ How Accuracy? ]. PH resolution is 0.01pH,accuracy ±0.01pH.TDS:0~9990 ppm, Accuracy:±2%. About Pancellent [ Convenience Use ] 5 Seconds know water quality, Accuracy, Faster. [ Pocket Portable ] Small size but Suitable for testing pH balance of drinking water, pool, aquarium, RO system, Spa, or...
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I believe you're correct - the bottles have been mislabeled or you're calibrating against the wrong set of values.
The readings are ≈ 10 and 7. pH meters can be calibrated against "high" or "low" values (my appellations). The values for the high range are 10 and 7, and are 7 and 4 for the low range.
In cannabis, we use the low range but your readings are very accurate (0.12 and 0.14 variance) if you were doing a high range calibration.
Check your meter settings and check the labeling for your pH solutions/packets.
When the values are that close (0.1) to something that's just a different set of values, I doubt that something's broken. In essence, you may have "zigged" when you should have "zagged".
The readings are ≈ 10 and 7. pH meters can be calibrated against "high" or "low" values (my appellations). The values for the high range are 10 and 7, and are 7 and 4 for the low range.
In cannabis, we use the low range but your readings are very accurate (0.12 and 0.14 variance) if you were doing a high range calibration.
Check your meter settings and check the labeling for your pH solutions/packets.
When the values are that close (0.1) to something that's just a different set of values, I doubt that something's broken. In essence, you may have "zigged" when you should have "zagged".
Hollatchaboy
Well-Known Member
I didn't even think of that. That could be mislabeled solutions. Id still soak the probe in storage solution fior a couple days, get some new calibration solution, and try recalibration.
Or you could use strips. It's up to you.
Or you could use strips. It's up to you.
Burndoggin
Well-Known Member
Don't chance your grow on a cheapo 20$ meter.
My inkbird calibrates to thoes numbers exactly when out into calibration mode. It was like $60. Well worth the peace of mind.
My inkbird calibrates to thoes numbers exactly when out into calibration mode. It was like $60. Well worth the peace of mind.