I am trying to calibrate my Hanna ph meter.
I mixed up new solutions of 4.00 and 7.00
I hold on till CAL shows up.
It says "use" 7.01
Then it says "use" "4.01"
After a few seconds it says "WRNG"
I mixed up new solutions of 4.00 and 7.00
I hold on till CAL shows up.
It says "use" 7.01
Then it says "use" "4.01"
After a few seconds it says "WRNG"
> It says "use" 7.01
> Then it says "use" "4.01"
> After a few seconds it says "WRNG"
Do you have pH stripes, to check if the second solution pH is really
around 4 (and the first one around 7)? Don't bother with high accuracy,
just check if they are around their proper values.
Borek
--
http://www.chembuddy.com/?left=BATE&right=pH-calculator
http://www.ph-meter.info/pH-electrode
> > I am trying to calibrate my Hanna ph meter.
> > I mixed up new solutions of 4.00 and 7.00
> > I hold on till CAL shows up.
> > It says "use" 7.01
> > Then it says "use" "4.01"
> > After a few seconds it says "WRNG"
> Assuming you have put the electrode in correct solutions as asked by the
> display content - something went wrong in the second solution. I don't
> know Hanna meters, but it is very unlikely to me that they don't show
> error message at once after dipping electrode into pH 7.01 solution - pH
> meter must recognize the solution before moving to the next one.
> Do you have pH stripes, to check if the second solution pH is really
> around 4 (and the first one around 7)? Don't bother with high accuracy,
> just check if they are around their proper values.
> Borek
> --http://www.chembuddy.com/?left=BATE&right=pH-calculatorhttp://www.ph-...
RD
> I mixed up new solutions of 4.00 and 7.00
> I hold on till CAL shows up.
> It says "use" 7.01
> Then it says "use" "4.01"
> After a few seconds it says "WRNG"
This makes me raise a question I was wondering about. Keep in mind
I'm small hobbist wine maker and a cheap skate. I've heard that you
can use 2 common household items with a PH at approx 7 and 4 instead
of the calibration packs. The hanna ph meter reads to 0.01 but is
only accruate to plus/minus 0.2. So very good accuracy of the test
solution isn't that important. A bottle of water (not tap) would work
for the 7 range. Any ideas what could work for the higher acidic
range? Windex, dish soap, Coke or Pepsi?? I guess you'd have to know
what the PH of each was before you calibrate.
I remixed the 4.00 and the 7.00
The meter reads 7.00 in the 7.00 solution
It is reading 4.70 in the 4.00 solution
I tried to recalibrate it, no go...
I do not know how else to confrim it?
What should distilled water read?
My fish tank has always read 8.20
It is reading 7.5 now.. I think this is wrong.
>>> I am trying to calibrate my Hanna ph meter.
>>> I mixed up new solutions of 4.00 and 7.00
>>> I hold on till CAL shows up.
>>> It says "use" 7.01
>>> Then it says "use" "4.01"
>>> After a few seconds it says "WRNG"
>> Assuming you have put the electrode in correct solutions as asked by the
>> display content - something went wrong in the second solution. I don't
>> know Hanna meters, but it is very unlikely to me that they don't show
>> error message at once after dipping electrode into pH 7.01 solution - pH
>> meter must recognize the solution before moving to the next one.
>> Do you have pH stripes, to check if the second solution pH is really
>> around 4 (and the first one around 7)? Don't bother with high accuracy,
>> just check if they are around their proper values.
>> Borek
>> --http://www.chembuddy.com/?left=BATE&right=pH-calculatorhttp://www.ph-...
> I have this meter and it's worked well for me for 3+ years. The 2-
> point calibration proceeds first with the 7.01 buffer then the 4.01.
> If you see 'WRNG', it means that the meter can't recognize your
> buffer. So either you've tried to do it out of sequence or your
> buffers are not what they're supposed to be. If you have commercially
> purchased buffers, try again in the reverse order. If you've mixed
> the buffers yourself, you should re-examine how you did it to make
> sure it's right.
> RD
> > I am trying to calibrate my Hanna ph meter.
> > I mixed up new solutions of 4.00 and 7.00
> > I hold on till CAL shows up.
> > It says "use" 7.01
> > Then it says "use" "4.01"
> > After a few seconds it says "WRNG"
> Maybe the probe needs replacement?
> This makes me raise a question I was wondering about. Keep in mind
> I'm small hobbist wine maker and a cheap skate. I've heard that you
> can use 2 common household items with a PH at approx 7 and 4 instead
> of the calibration packs. The hanna ph meter reads to 0.01 but is
> only accruate to plus/minus 0.2. So very good accuracy of the test
> solution isn't that important. A bottle of water (not tap) would work
> for the 7 range. Any ideas what could work for the higher acidic
> range? Windex, dish soap, Coke or Pepsi?? I guess you'd have to know
> what the PH of each was before you calibrate.
As to the OP, email Hanna, they are good at customer support. I have
this meter and never had this issue, mine is around 5 years old.
Joe
Borek
--
http://www.chembuddy.com/?left=BATE&right=pH-calculator
http://www.ph-meter.info/pH-electrode
http://www.bpp.com.pl/?left=dysleksja&right=dysleksja
http://www.terapia-kregoslupa.waw.pl
But you are absolutely right that it doesn't make sense to look for
household items, as relatively precise buffers can be bought cheap.
Borek
--
http://www.chembuddy.com/?left=BATE&right=pH-calculator
http://www.ph-meter.info/pH-electrode
http://www.bpp.com.pl/?left=dysleksja&right=dysleksja
http://www.terapia-kregoslupa.waw.pl
> > I am trying to calibrate my Hanna ph meter.
> > I mixed up new solutions of 4.00 and 7.00
> > I hold on till CAL shows up.
> > It says "use" 7.01
> > Then it says "use" "4.01"
> > After a few seconds it says "WRNG"
> Maybe the probe needs replacement?
> This makes me raise a question I was wondering about. Keep in mind
> I'm small hobbist wine maker and a cheap skate. I've heard that you
> can use 2 common household items with a PH at approx 7 and 4 instead
> of the calibration packs. The hanna ph meter reads to 0.01 but is
> only accruate to plus/minus 0.2. So very good accuracy of the test
> solution isn't that important. A bottle of water (not tap) would work
> for the 7 range. Any ideas what could work for the higher acidic
> range? Windex, dish soap, Coke or Pepsi?? I guess you'd have to know
> what the PH of each was before you calibrate.
Where the cream of tartar can come in useful is in checking the
accuracy of the calibration. I ran into this actually on the weekend
because my buffers are well past the expiry date on the label, so I
measure a cream of tartar solution after calibration to make sure I
wouldn't dump in tartaric acid into a wine that didn't need it. It
measured at 3.55 so spot on.
Pp
I ordered new solutions, probe storage solution and a new probe.
My plan tonight.
Make new solutions and check old probe.
If it still has the error message then replace the probe and retest.
>>> I am trying to calibrate my Hanna ph meter.
>>> I mixed up new solutions of 4.00 and 7.00
>>> I hold on till CAL shows up.
>>> It says "use" 7.01
>>> Then it says "use" "4.01"
>>> After a few seconds it says "WRNG"
>> Maybe the probe needs replacement?
>> This makes me raise a question I was wondering about. Keep in mind
>> I'm small hobbist wine maker and a cheap skate. I've heard that you
>> can use 2 common household items with a PH at approx 7 and 4 instead
>> of the calibration packs. The hanna ph meter reads to 0.01 but is
>> only accruate to plus/minus 0.2. So very good accuracy of the test
>> solution isn't that important. A bottle of water (not tap) would work
>> for the 7 range. Any ideas what could work for the higher acidic
>> range? Windex, dish soap, Coke or Pepsi?? I guess you'd have to know
>> what the PH of each was before you calibrate.
> That doesn't work if you can't set the calibration value on the meter
> to what the pH of yout household item "buffer" is - for example, for
> cream of tartar solution you'd need to set the calibration point of
> the pH meter to 3.53-3.55 instead of 4. You can't do that on pHep 5.
> Where the cream of tartar can come in useful is in checking the
> accuracy of the calibration. I ran into this actually on the weekend
> because my buffers are well past the expiry date on the label, so I
> measure a cream of tartar solution after calibration to make sure I
> wouldn't dump in tartaric acid into a wine that didn't need it. It
> measured at 3.55 so spot on.
> Pp
I changed the probe
Now it calibrates fine with no errors....
I also bought some pH storage solution. Hopefully I get more then 2
years on this probe.
>> They are stable for a pretty long time - afterall, they
>> are buffers.
> pH 4 buffers are stable, pH 7 more or less stable, pH 10 buffers are
> unstabel if they are not kept airtight. Once again that's CO2 in action.
> But you are absolutely right that it doesn't make sense to look for
> household items, as relatively precise buffers can be bought cheap.
> Borek
> Now it calibrates fine with no errors....
> I also bought some pH storage solution. Hopefully I get more then 2
> years on this probe.
See more on the http://www.ph-meter.info/ site.
Borek
--
http://www.chembuddy.com/?left=BATE&right=pH-calculator
http://www.ph-meter.info/pH-electrode
http://www.bpp.com.pl/?left=dysleksja&right=dysleksja
http://www.terapia-kregoslupa.waw.pl