problem ph

[marco3020]

there is a test to be done to see if the probe is to be changed?

[rimai]

Calibrate and place the probe into the calibration fluids you used in the calibration.
It should show their value.

[marco3020]

yes, I've done 100 times when I put it in the solution pH 4 I get kind ph 4:40

[marco3020]

Explane please

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[rimai]

Maybe you ought to try the 7 and 10 if 4 and 7 is not working for you.
Someone else did it with 4 and 7 and got it to work just fine.

[marco3020]

I need the probe 4 and 7 because I have to connect the reactor elletrovalvola

[rimai]

Linearity of pH probe is pretty good within all ranges that we use:
http://en.wikipedia.org/wiki/Glass_electrode

[marco3020]

Good morning and Merry Christmas to everyone today I calibrated the probe again and me with solution 4 = 4.16 and 7 = 7.02 solution over so I can not right?
I need to update some library?

[rimai]

Looks pretty good.
You just need to let the probes stabilize a little more before you complete and also make sure that the solutions are the same temperature as your tank water.
You will never get exact measurements. This is not a scientific device nor the probe is scientific/lab grade.
Personally, your calibration is fine as it is.
It has a .16 deviation on a 3 ph span.
In the range of pH you are going to be working on, it would mean something like 0.025 ph deviation
I don't think your reactor can even notice this minute difference.
i more bubble inside your reactor can cause more deviation than that...
Just my 2 cents, but if you really want to push to get it down to perfect calibration, please go ahead.

[marco3020]

good day yesterday, the solenoid valve is always on, and marks on the reef angel ph 680 up and down, now I have removed the pH probe from the reactor and put into solution pH 4 and pH 6.60 tells me, I try to recalibrate and idem, which I do?
with the reef angel...

[rimai]

What numbers are you getting when doing the calibration?

[marco3020]

with ph 4 290 and ph 7 310, the pH probe is rechargeable?, what product I could use to clean it?

[rimai]

No, they are not refillable.
Those numbers don't look correct.

[marco3020]

so how should I do? 12 months that have the probe

[rimai]

Do you you have another probe to try?
PM me if you want an RMA number.

[marco3020]

No i dont have other prob

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[marco3020]

ph non t fuction i think change