Help! Hanna PO4 meter not working?

[icliao]

My Hanna PO4 meter arrived yesterday. It works like wonder only briefly. I measured my 200GL 4 times in a row and the results are all very close at 0.03, 0.02, 0.02, 0.03.
In my 500GL I get reading at 0.06, 0.04, 0.06, 0.07

I may not have cleaned the glass curver immediately and now the results are all pretty high when I test today. Even distill water I am getting 0.09 ppm! The water from Phosban Reactor was testing to be 0.02, 0.01 and 0.01 for 3 times and now also tested 0.05 ppm. Also my tank tested at 0.06 - 0.07 is now becoming 1.2.
Everything just not seemed working again.

What can be done? Can I bleach the glass curver and expect the results to return normal?

 

[VCoo71]

it is pretty difficult to keep the cuevets clean.....i keep mine stored in RO/DI water when not in use....and when testing i spend most of my time wiping them off...and making sure theres no bubbles inside

charlie

 

[clkwrk]

High turbity interfers so does high iron

 

[icliao]

<a href=showthread.php?s=&postid=8279849#post8279849 target=_blank>Originally posted</a> by clkwrk
High turbity interfers so does high iron

What could be the reason of high reading (0.09 ppm) on distill water?

 

[clkwrk]

Sorry missed that . What about batteries?

Are you zeroing it out before adding the regent then testing it?

 

[Stoney Mahony]

Call up hanna and troubleshoot with their techs. I talk to them a few times a week and they are VERY knowledgeble about their products.

 

[icliao]

<a href=showthread.php?s=&postid=8279877#post8279877 target=_blank>Originally posted</a> by clkwrk
Sorry missed that . What about batteries?

Are you zeroing it out before adding the regent then testing it?

I just received the unit the day before yesterday. Probably I should replace the battery to try again.

I zero out each time I test a new sample.

Could the containmination produce such outrageous result?

This is really ****ing me off to pay so much that last only 1 day :mad2:

 

[Stoney Mahony]

Yes, depending on how much contamination there is.

Im tellin ya, call or email hannah, worst comes to worst, they will ship you a brand new meter for free . I doubt it would be worth it for them to have it shipped back from indonesia. Good luck