PH Meter

[Batman]

Hi, anyone can share faster way of calibring the PH meter, i have been sitting there with screwdriver trying to get the '7' & '10' so few hrs!!!!! managed to get the '7', the '10' seems not responsing. Please assist!!!

[weileong]

For 7 you need to use pH 7 solution and 10 pH 10 solution.

If you're doing that and you are sure the solution are fine that means something wrong with the pH meter already.

Try to soak the pH probe in warm (about 60degs C) water for 15mins. After that try recalibrate again.

[Batman]

thks! Wei Leong, trying now!!!!

[lightningstrike]

i had the same problem as u do abt 2 days ago while i was recalibrating my pH controller. only that i was trying to calibrate between pH 7 & pH 4. i managed to get 7 but not 4.

tried weileong's method but doesn't work. ended up buying a pH probe from SLT. everything works fine now. turns out my old pH probe was faulty.

[Batman]

u are lucky man!!!! Henry helped with it but only to realise something has broken in the meter for "4" - "10".... very very sad, it was a gift from someone, BRANDNEW, I swear that when calibring it, I felt it was not responding until so long that's why posted here & tried WeiLeong's method....has PM the shop & replied was no WARRANTY IF MISHANDLING!!!!! & said agent & themselve have checked???? Personally I feel QC check covers calibring themselve or ????? ANYWAY, if my friend cant get a replace set from THE SHOP, that it!!!!!!!! Once a lifetime we patronise the shop & that was the time!!!!!!!!

[weileong]

that's a crappy shop man.

What's the brand of the pH meter?

[Batman]

BRANDED!!! Is Pinpoint!!!!!! but to me is now a piece of EXPENSIVE PVC CASING!

[weileong]

I think maybe misunderstanding with the shop is it?

I would F the shop unside down if they straight away tell me it is not their problem and everything has been check and you buy liao die your problem and don't go back to them because it is all checked when they sell it to you.

[Batman]

at least you are here to share my sorrows!!! shall let my friend handle the case .... hope to resolve it amicably .... if not ..................... shall sell away it as PINPONG!!!!! $199 damn expensive for PINPONG!!!!

[lightningstrike]

Geez...... some quality service from the "shop" so to speak.

[weileong]

I wonder which shop that is....

[Batman]

haha, not here to tarnish anyone's reputation or so .... not very to mention the shop's name shalle keep u guys posted when i discuss with my friend if we can sort things out with the shop ..........

[steven]

juz to ask...

calibrating of the ph7 is done by turning the screw, rite ?

so after that when i dip into ph10 and it is not accurate, what should i do ?

if i tune the ph10, the ph 7 goes out of cal ?

pls help

[salivateforme]

Hi there,

I've recently bought a ph meter too. However, I am at a loss as to how to clean it. Do I rinse it with tap water after dipping and testing the water in my tank? After that, do I use a clean tissue to dab the glass probe dry?

Hope you can advise...

[weileong]

You should always keep the pH probe wet.

There should be a cover that comes with the probe. After using it, put back that cover. Best to fill with KCl, if not distilled water or tap water (last resort) will work too.

If the probe drys out then the probe could be damaged.

[salivateforme]

You should always keep the pH probe wet.

There should be a cover that comes with the probe. After using it, put back that cover. Best to fill with KCl, if not distilled water or tap water (last resort) will work too.

If the probe drys out then the probe could be damaged.

oh dear...i have kept it dry...'cos when i first bought it, it was dry. How will I know that it's damaged?

[salivateforme]

Phew...okay. My Ph pen is from Hanna instruments.. I just called the company and they said that the main issue is caliberation. The probe will not spoil from drying out...only go off-kilter...

regards

[weileong]

oh dear...i have kept it dry...'cos when i first bought it, it was dry. How will I know that it's damaged?

When calibration fails.

Or you never cal it at all ?

[Batman]

new ones are with a cap, have to remove it & run under tap water then dip in the given liquid,,, & if cos it has to be kept wet .....

[salivateforme]

Hi, dun mean to hijack this thread..

I bought the buffer and caliberated it. My reading now hovers between 7.9-8.1. It refuses to stabilize. Which reading do I accept?

Also, what is the Ph for our tap water? I get 7.9 out of my tap.

[shoelevy]

salivateforme, i did read from somewhere that if the reading fluctuates it indicates weak batteries...i think its stated in my user guide

i get 7.6 out of my tap

i'm using the yellow milwaukee one

i just calibrated it yesterday with ph7 and 4 solution...what i got is if tune to 4 will get 7.1 with the other solution and if tune to 7 i'll get 3.9. i guess its got sth to do with the solutions themselves because remember that during manufacturing, impurities, mass production of chemicals and different companies have different methods of testing the ph of the solutions they produce so slight discrepencies in ph of solution produced is inevitable

for me, as long as the difference in ph reading between the 2 solutions is around 0.1 it should be fine

[seafood]

salivateforme, mi also just realise our tap water is not that "neutral" after all.

Bought new pH pen, test with buffer - read 7. Check tap water 8+. SHOCK , thought meter faulty (very sian today just buy leh). Found out following info from our friendly "neighbour" wersite.

http://www.arowanaclub.com/forum/showthrea...71180#post71180

Tap water reading

Sembawang area is also around 8.5

Sengkang it is around 8.5-8.8

Chua Chu Kang, I tested the PH is 9.1 to 9.3

Wonder if anyone has test their tap water pH reading???

Guess cannot use tap water to gauge pH liao. unless willing to wait 4 H20 2 age....