can some one explain this to me 2.76ms/cm2 its on the botles of calibration solution

is it a ec of 2.7 and cf 27 or 2.0 and 20

My EC metres are calibrated at a pH of 4.0 and 7.0.

I've looked on my bottles and I can't see anything like that. I presume it is a measure of the concentration of the buffer in the solution, 2.76? per cm2.

you calibrate you ec meter with PH BUFFER

what kind of meter is it? i thought they were factory calibrated. but maybe your is different

the one i am using is factory calibrated but i want to check my meter just to make sure

Dip your ec meter in and it should read between 27 and 28 or 2.7 and 2.8 whichever way you read it

Ph meters are done with ph buffer 4 and 7

Owd

sorry you caught me out there, my EC meter is pre-calibrated, so I presumed it must be pH you was calibrating. I thought if mine doesn't need calibrating then why would others?

Forgive me (and I'm not even stoned), I'll try to read the question properly next time.

Hi Owderb
well thats what i would of thought 27
but i have just tested it and its 20 on the meter and i done it again with brand new batteries in the meter and its the same 20 so still not sure is the meter broke or is the solution 20

If the conductivity fluid you are using is 2.76 then thats what it should read mate

sounds like i need a new meter then
its good i checked it then because they calibrated at the factory but they dont always stay true i thought i was going through a bit of nutrient

Hopefully they'll be no need for a new meter, just adjust your meter till it shows 2.7 (while immersed in calibration fluid) ... my meter always needs a little nudge one way or t'other after a couple of months

its a wand i use i dont think you can calibrate them
back to the old blue hanna ec meter me thinks they cool you can calibrate them

Bad one
I'm sure you can get replacement 'tips' for those wands... prob cost a bit though,
got me a cheapo meter a year ago from de bay and its still pretty much spot on

if its like a bluelab truncheon or the nz truncheon they can't be calibrated.

If it is 0.7 out, can't you just minus 0.7 off your readings

how ?



sorry i a stoner

First thing i'd do is change the batteries and get some Cif cleaner or similar and give the probe a clean,then always stand your meters in fluid when not in use

Owd

I was going to mention perhaps cleaning the probe, I have just figured to do this to mine and am waiting on the solution.

What kind of liquid should you stand an ec pen in owderb?

Bob

In the calibration fluid mate

I stand my truncheon in a little plastic pot with fluid in ad my ph pens have always got ph buffer in the lids when i put them away

Owd