Hanna PH 'reference junction' cleaning

[navairum]

Hey fellow members,
Been along time since I've posted, but have kept active reading

Long story short, I've recently started up again but I've been having some PH problems which are really starting to hurt.

I bought this meter roughly 5 years ago and haven't performed much maintenance (stored in solution when possible). I've been reading online saying that the 'reference junction' may be clogged, and all I need to do according to the manual is:
"
Pull out 2 mm (1/8'') of the
cloth junction to renew the
electrode reference (it is rec-
ommended to cut the cloth
leaving always at least 2 mm
-1/8'' over the reference com-
partment) and recalibrate the
meter
"
http://www.hannainst.com/manuals/manHI_98106.pdf

Model: Hanna HI98106 Champ

However I'm not quite sure what exactly to pull out or how... Can anyone share their experiences with this?
I imagine I'll probably have to replace the diode as well, I'm interested to hear your thoughts.

Always a pleasure.

 

[navairum]

Sounds like most people replace their pens pretty frequently, perhaps I'll just go that route..

 

[growshopfrank]

its been a while since ive done this so bear with me..
at the electrode end there is a glass bulb and next to it should be a little wick held in by a small round plug
using tweezers gently pull the wick out
the plug should pop out with the wick
pull about 1/4" or 5mm of the wick out
replace the plug
calibrate the pen with buffer solution (i would use ph4 buffer)
done

FWIW regardless what hanna says about a replacement electrode for their champ series pens there has never been one available

 

[navairum]

Thanks for the advice, I'll give that a shot and see how it goes.

 

[chuewy]

.

 

[growshopfrank]

There is a more simple way than using a tweezer to pull our the electrode; you can simple push off the electrode from the side with the black attachment that came with the pen.

from your post i can guess that you have never seen a champ series PH pen