My pH meter flashes "16"

Chemical Earthing Electrodes help in meeting all kinds of earthing and grounding needs for industrial and residential purposes.

Gmax Chemical Earthing Electrode consists of the main earth electrode encapsulated within another pipe filled with highly conductive compound. gmax main earth electrode thus protected by the presence of the conductive compound and the outer pipe last beyond a normal GI pipe electrode. Highly conductive property of the compound facilitates the fault current to immediately discharge through the outer pipe to the surrounding area.
Gmax whole assembly of the Chemical Earthing Electrode is then installed in a bore made in the earth and the space around is filled by scientifically developed earth enhancing compound.

With an increase proportion of technology, we are manufacturing and supplying Chemical Earthing Electrode.
Specifications:
Lengths OD ISI GI ISI GI Pipe Technical Details Outer Pipe Thickness Inner Pipe Thickness Outer Inner Copper Terminal 3.0 meter 300 cm x 90 mm 40 mm 50 mm x 6 mm 14 gauge 12 gauge 2.0 meter 200 cm x 90 mm 40 mm 50 mm x 6 mm 14 gauge 12 gauge 1.5 meter 150 cm x 90 mm 40 mm 50 mm x 6 mm 14 gauge 12 gauge 1.0 meter 100 cm x 50 mm 25 mm 25 mm x 3 mm 14 gauge 12 gauge
GMAX Chemical Gel Earthing Electrode: GMAX Leveraging on our years of industry experience, we are instrumental in manufacturing and supplying Chemical Gel Earthing Electrode. Offered electrode is used for earthing owing to its excellent electric conductivity and durability. We used only quality-approved raw materials to manufacture these electrodes so as to make these suitable for use in commercial or residential areas. We properly check offered Chemical Gel Earthing Electrode on different quality parameters to remove any kind of defect.
Product Attributes:

1. Highly reliable for safety of human life
2. High load carrying capacity
3. Maintain low resistance value
4. Maintenance free and corrosion free
5. Available in different specifications
6. Easy installation and longer service life
7. Low thermal insulation and high conductivity
8. Protect from voltage breakdown or leakage current

remove the new cartridge and clean contacts of cartridge and iside printer with Qtips / alcohol..you might have communication problem with cartridge due to dirty contacts..sometimes they get dirty fro spilled ink from jets..then retry

f your zero adjustment won't turn far enough for proper meter reading then the measurement electrode has "lost it's span" and will require a severe chemical cleaning (i use gentle heated muratic acid followed by a water boil allow to cool off before using ) or replacement if spec model allows for this , Note: heated acid is extremly dangerous and corrosive and you should use all possible safety precautions when using it

The electrode you have is a combination electrode with an integral calomel reference half-cell and built-in temperature probe. Since the temperature reading is good, the temperature probe is okay. It isn't part of the pH circuits anyway. (Your meter uses the temperature to calculate a temperature correction of pH.) Something else is going on with the electrode proper. Its funny behavior suggests to me that it has dried out internally.
pH electrodes don't last forever. How old is this one? If it's an old one, it's probably time to replace it. If it's new and doesn't work, it may be under warranty.
If you shop for a new electrode, get a gel-filled one. And go for one with a silver/silver chloride reference instead of a mercury one -- especially if you are using it on food or other samples that may be consumed. Another consideration about calomel electrodes: they take hours to recover from relatively small temperature changes. Ag/AgCl references aren't as sluggish.
Finally, take care when storing the electrode. It should be stored under humid conditions to keep it from drying out. The best way is to put a small piece of cotton or glass wool soaked with distilled or deionized water inside the plastic end cap. For shorter-term storage, e.g., overnight, you could immerse the tip in pH 7 buffer.

No I have a hanna phep for my koy pond I never calibrate it just clean it in fresh water every use shake it in water

take the positive and negative off the old battery put in new battery replace cables

Clean all anode and electrode in light acid solution and replace sensors.

norm - brown grayish-tan deposit on side electrode.
carbon fouled - black, dry fluffy soot on insulator tip and electrodes
oil fouled - wet, black, oily deposits on " " " "
burned - blisters on insulator tip, and electrodes
worn - severely erroded or worn electrodes

I took my humidifier apart to see what was wrong with it and saw the carbon electrodes were caked with salt deposits. While cleaning them off, one of the electrodes broke about halfway down. I noticed the electrodes were hollow - about a 3/16" diameter hole down the middle.
I found a small diameter screw from a toggle bolt assemble, cut the head of the screw off, cut the remaining threaded piece to about an inch long and used it to splice together the broken carbon electrode. I reasoned that the steel piece is only touching the carbon pieces, and not the wire leads, it should be ok/safe resistance-wise. I put everything back together again, and voila, the unit worked!

Is this probe in Robinair AC machine ? if so,the you neet to replase new one.because it seems to be broken ( probe tip sensor)