Question on meters

Sry for the random thread. about to run out the door and need a fast answer as to what solution im supose to put in the cap on my Hanna PHep meter.
i used the search feature but i just get millions of threads with 1 or 2 wods highlighted with no usefull info

Use the same 7.0 solution you use to calibrate it. I don't put it in the cap, I fill a shot glass and keep the meter in it tip down and cap on.

Illegal Smile said:

Use the same 7.0 solution you use to calibrate it. I don't put it in the cap, I fill a shot glass and keep the meter in it tip down and cap on.

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gotcha thank you. im thinking i might have messed mine up. couldnt find 7.0 solution so i used 6.5 from a pet store 1 teaspoon per 2 gallons. and i turned the little screw untill it read 6.5. is this ok to do? otherwise i prolly just screwed up my flush.

as long as you're sure that the solution you mixed up was a pH of 6.5, then yeah you made the adjustment right. What was your initial reading before you started turning the screw?

You can calibrate to distilled water which is 7.0, but it doesn't make good storage solution.

my initial reading on the meter before i turned the screw was 7.2 when i put it in the mix of 6.5 solution and water... I tried to use as close to the regulated dose for 2 gallons.. i have never regulated it before sense i got it. so i have no idea how off it came from ebay. (new)

putting water out now to distill will recalibrate it to that. where can u find 7.0? i found 7.5 and 6.5

edit: when i tested just the water from the tap. non distilled it read 7.9-8.1 (before tweaking)

well it looks like my solution was .1 off. when it put it into the distilled water read 7.1 ima wait alittle longer. test it again and if its still 7.1 ill recalibrate it to 7.0.... but this means my 5.5 run off on my plant is actualy 5.4 so im really low. and cant flush it again with a higher ph untill she dries abit

Intermittent storage: Between uses, store the electrode in solutions of similar ionic strength and pH to the samples of
interest. ie store in nutrient water.

Overnight storage: Store the electrode in Electrode Storage Solution to keep the electrode hydrated. The most typical commercial storage solution is a Pottasium Chloride solution at a pH of 4.0. If that is not available us a calibartion fluid with a ph of 4.0, or a second choice is 7.0. Never store in RO water, RODI or distilled water. If you have nothing else tap water is fine. Storage in a low ioinic strength solution long term will greatly shorten the probes life span. Calibration solutions without pottasium chloride added should not be used for long term shortage as they will also shorten probe life span as they have too low of an ionic strength.

Shelf Storage: For very long-term storage, store the electrode dry. For faster reconditioning in the future, wet the cotton/wool
ball located in the vinyl storage cap with storage solution. Place the cap over the electrode. This will help keep the bulb
hydrated.

Hi guys,

Just got my ph/ec meter in the post. The ph probe looks like it had a bottle attached to the end to keep it moist, however the bottle is empty with a little residue in it. Does the probe need to be wet continuously, even before I calibrate and use it ? Do you think its now damaged by having a dry tip ?

cannabox4me said:

Hi guys,

Just got my ph/ec meter in the post. The ph probe looks like it had a bottle attached to the end to keep it moist, however the bottle is empty with a little residue in it. Does the probe need to be wet continuously, even before I calibrate and use it ? Do you think its now damaged by having a dry tip ?

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If it is a gel type probe it is very likely fine. Just soak it 20 or thirty minutes in some storage or calibration fluid or even some tap water before use. usually the ceramic junction becomes pretty clogged whr en the solutiom evapoat rtes or leaks out slowly. If it does work the first time try saoking it in a little vinegar say for 2 or three minutes then try again. You may get a crappy reading that doesnt' make sense, say a reading of 10 or 11 or 3 or what ever, but just calabrate it and ir t should be fine. Most PH probes will last at least a year unless they are stred wet in a low ionic strength water. Wg hen that is done the ioms will transfer to the water that is being used for stoarge unti the ionic content of the sr torage water matches the ionic content of the solution inside the probe. It can happen in a few weeks if the probe is sti uv ck in alarge amount odf low ioinic strength solution. It is lawu ys better to store it only in a small amount of solution.

Your local hydro store should be able to calibrate it for you for free. I get them too do mine every month or so.

The solutions, calibration and storage are sold quite cheaply on eBay. For calibrations solutions (if you have a good meter) you should calibatrate with two solutions. One should be a pH just above your normal tseting range and the others should be just below your normal tesi ting range. So for hydro (if you pH meter with aceptdouble calibartion) use something around a pH of 4 and a pH of between 6 and 7. Trying to always get free pH calibrartions is lame. Your growing something worth a couple hundred an ounce. If you can't afford pH calibration fluid you can't afford to grow or smoke pot.

You should NOT store your Hanna meter in regular calibration fluid. I bought in to the idea that you could do so because it says so on the GH calibration fluid bottle, and I did so for about a year. One day I looked closey at the probe and electrode and they were all scummy. I got a bottle of Hanna Electrode Storage solution and that what I now use. As someone said, this solution had a PH of approximately 4, not 7 as the calibration fluid. This is more acidic and has a definite cleaning action on the electrode and probe. My advise is to use the Hanna solution, but hey, whatever works for you

Hidden Dragon said:

You should NOT store your Hanna meter in regular calibration fluid. I bought in to the idea that you could do so because it says so on the GH calibration fluid bottle, and I did so for about a year. One day I looked closey at the probe and electrode and they were all scummy. I got a bottle of Hanna Electrode Storage solution and that what I now use. As someone said, this solution had a PH of approximately 4, not 7 as the calibration fluid. This is more acidic and has a definite cleaning action on the electrode and probe. My advise is to use the Hanna solution, but hey, whatever works for you

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Proper storage solution is a high ionic solution at usually a pH around 4.5 It contains Pottasium Chloride as does most actual pH prope electrolyte. pH buffer solution does not contain the potassium chloride anf therefore is a low ionic solution.. Therofre usingit is barle betterthat using RO water or Distilled water. Neither are good for a storage solution because the lack of ions draws the ions out of the electrolyte solution lowering the pH probes like span.