Yes I am using both. Sorry only have 1 pictured.from what little i know you need to use PH solution closer to your target goal.
try PH solution 7
Have you followed the instructions on the back of the unit on 'How to Calibrate"?
My Bluelab Combo has the instructions on the back of the unit. I am assuming yours might, also.
Good luck
Bluelab suck, i had two of these now and treated them better than my wife and they still broke lol
Are you storing the probe properly? It needs to stay hydrated when not in use, they provide a cap and a sachet of storage solution. Very important.
I think, with the more modern bluelab combo, you have to calibrate to 7 first, then 4. I keep clean water to rinse the probe between solution.
The meter itself has a 5 year warranty, so if you can't figure it out take it back to the retailer
ok this may be out of line , so take it the way i mean it (nicely trying to help)
so they both read 3 higher then.
why can't you adjust the reading down to correct reading?
on mine i put it in the buffer solution and if off then i hold cal button for 10 seconds or until it flashes "cal", then use the down button until you read whatever solution your in then press enter. leave the meter in the solution until it says end
if you can't adjust them then both are hooped.
also, did you hydrate it for at least 15 minutes before you used it?
and store it standing upright
Press “power/hold” button.
3. Calibrate to pH 7
Place probe tip in fresh Bluelab pH 7.0 Calibration Solution. Wait for reading to stabilise to between pH 6.6 - pH 7.5.
Long press the Cal button on the pen or meter until “CAL” is displayed. Release button. A calibration sequence will start, sequentially flashing "0" across the display. After "0000" stops flashing, the sequence is complete, and “pH7” is displayed.
sorry i wasn't trying to be a dick. that's just how mine works.
this is the only thing i could find that might help you.
i just find it weird that 2 pens are busted.
good luck
come to think of it, mine read 10 at the start also.
you might need to swirl the pen around in the water to get an accurate reading.
high ph water seems to screw with it and also bubbles in the probe
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