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PostPosted: Jan 18th, '12, 16:22 
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Anyone had any experience of this meter?
I was given one today and it seems to be total crap.
Periodic testing of the FT water has ranged from 6 to 8.9

I accept that it has probably never been calibrated since new, but one would expect a steady reading even if it was slightly out.

Also when you turn it on, it briefly says "16.6" then goes to the pH value.
What is the 16.6?
I was hoping it was temp, but it isn't.

http://www.hannainst.com/manuals/manHI_96107.pdf

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PostPosted: Jan 18th, '12, 16:25 
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Seriously, this cant be healthy.
Seriously, this cant be healthy.
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Sounds like it needs to be calibrated....

Hanna usually makes pretty good gear....

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PostPosted: Jan 18th, '12, 16:37 
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As you've suggested, if it was only out of calibration it should still settle on one reading, just the wrong reading.

If you are getting fluctuating readings then I would suggest the gel in the probe and/or the wick has dried out, or it could also need new batteries, which would then require a re-calibration afterwards.

Some hydro stores still re-gel meters, ring around and then take it in for the shop owner to have a look see... much better than getting a diagnosis over the interweb and throwing out a repairable meter.

As Rupe said, Hanna are generally good meters, but they still need looking after, ie: not letting the tip dry out. In saying that, don't fall for the "meter tip must always be stored in storage solution" furphy. I've sent a number of customers meters back for repair that have been stored in storage solutions.

I have a Eutech meter that is about 14 or 15yo now (1997 or 98 I bought it). I replaced the tip for the first time a couple of years ago and I've never stored it "storage solution". When in regular use, I just wash the tip under the tap after each use, don't dry any water off, then put the cap on tightly. Even when I stored it for a couple of years all I did was cut a little bit of material from an old flano shirt, double it over in the bottom of the cap, wet the material, put the lid on the meter, re-wet material every 3 months or so.

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Last edited by Mr Damage on Jan 18th, '12, 16:50, edited 1 time in total.

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PostPosted: Jan 18th, '12, 16:49 
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Ah ok thanks for that.
I didn't know they could dry out.
This one has been sat in a cupboard for at least 2 years, unused.
Batteries seem fine, so it's probably the wick.

Trying to think of the Thai for:
"Oi matey, my probe wick has dried out, can you fix it for me?" :)

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PostPosted: Jan 18th, '12, 16:50 
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Seriously, this cant be healthy.
Seriously, this cant be healthy.
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To true Yabbies... could well be the gel...

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PostPosted: Jan 18th, '12, 16:54 
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Quote:
Trying to think of the Thai for:
"Oi matey, my probe wick has dried out, can you fix it for me?"

Yeh... didn't look at your location... you may have a hard time finding a hydro store over there. :D

Quote:
To true Yabbies... could well be the gel...
Yep!... Unused for two years.. that'd be my bet!... especially with fluctuating readings.

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PostPosted: Jan 18th, '12, 20:22 
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If you went from a sample of pH 8 straight to a sample of 4, how long would you expect it to take to stabilise?
I've left it in a bowl of FT water for the day and it seems to have calmed down a bit, in fact if anything it seems to have fallen asleep, takes over 20 minutes when going from 4 to 8 and about a minute going from 8 to 4.

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