Hanna pH tester problem

floridabobxJuly 4, 2008

Hello,

I recently attempted to upgrade from litmus paper to a meter for pH testing, but I'm having some trouble. I bought a HANNA 98108 pHep+.

I strictly followed all package instructions upon opening it, including letting it sit in pH 7.01 solution for 2 hours to activate the electrode.

However, it seems impossible to calibrate. After calibrating with 7.01 and 4.01 solution, within a minute it is off again, generally by a lot. When compared with the results of litmus paper, it is usually off by at least a full point immediately after calibration, but it varies greatly. When left to sit in 7.01 calibration solution, the reading slowly slides until after several minutes it may be up or down several points.

Am I missing something? Did I just get a bad unit?

Thank you for reporting this comment. Undo
greystoke(South Africa(11))

Sounds like your probe is faulty. I suggest you get back to your supplier. Hanna is a good make. I'm sure they'll fix the problem.

    Bookmark   July 4, 2008 at 11:21AM
Thank you for reporting this comment. Undo
garysgarden

Yep, I agree with greystoke here. If your meter's reading drifts while sitting in the same solution there's something wrong with either the probe or the meter.

Talk to Hanna and see what they want to do to fix it.

    Bookmark   July 10, 2008 at 6:15PM
Sign Up to comment
More Discussions
Nutrients and PPM
I'm new to hydroponics and have a question. I bought...
amint17
Hydroponics Chillies Problems
Hi everyone. I'm growing some jalapenos and habaneros...
pborgbarthet
Hydroponics
Hi all! I'm a beginner at hydroponics gardening......
skttls
Pepper Plant Fruiting
Hi, I am wondering if I can keep continuously fruiting...
StonedTree
Questions on passive hydro
Hello guys, I currently own a big sansevieria and want...
turbare
Sponsored Products
Patio Living Concepts Outdoor Lighting. Catalina Bronze Outdoor Floor Lamp with
Home Depot
Polaris P2091VW Porcelain Vessel Sink White
PLFixtures
Salsbury Industries Lockers S-33000 Series 36 in. W x 76 in. H x 21 in. D
Home Depot
Reed and Barton Silver Beads Triple Hinged Photo Frame - 2W x 3H in. - LV1323-3
$50.00 | Hayneedle
Auberge Monogrammed Tub Mat - WHITE (H)
$39.00 | Horchow
Fresca Torino Light Oak Modern Double Bathroom Vanity, Cabinet & Sinks
Hudson Reed
Progress Lighting Alpha Trak Black 1-light Track Head P6369-31
$41.40 | Home Depot
Wee Manhattan Planet Canvas Wall Art by Nikki Smith - 40W x 40H in. - NSM004HN
$276.99 | Hayneedle
© 2015 Houzz Inc. Houzz® The new way to design your home™