tds meter calibration solutions

[Guest]

I have a tds meter froma manufacturer says uses nacl solution for calibration. I didn't notice that before I bought regular 1500ppm claibration solution. I stuck the tds meter in the new solution, and it was reading way under the 1500. I then noticed that I was to get nacl solution. Is there really a difference in the different calibration solutions?

Cheers,
SH

 

[NoNameNoshame]

No, unless it says another ppm value.

I just check where my RO water is at, usually 10ppm then go from there.

My calibration thingy on my TDS busted so....................

 

[dogmeat]

This is kinda odd...because I have had the similar situation...a friend of mine bought a TDS tester to replace his and then noticed that he wants the same solution you refered too.....we ended up calibrating it w/ a 900U soution instead of the 1500U solution....i wish i knew the differance.

 

[Guest]

the solutions are set ec/cf/ppm measurments for u to calibrate with ,,so if u use a 900 solution and calibrate your metre so it reads 900 then u set it correctly

 

[Guest]

the solutions are set ec/cf/ppm measurments for u to calibrate with ,,so if u use a 900 solution and calibrate your metre so it reads 900 then u set it correctly

thanks...so I guess I don't have to order another bottle.

I did notice that it sure took alot more of my nutes to get to 1400ppm than what the feed schedule recommended, until I adjusted the meter, and it was almost exact to the manufacturers recommendations.

Just wanted to be sure, as I kept reading about NaCl solution for my meter.

Cheers,
SH

 

[waster]

I think ppm meters use a conversion factor to convert from ec values to ppm. The standard (general purpose) factor is 0.5, but for hydro nutes 0.7 is used, so it could be that your meter uses the 'wrong' factor?

sorry, I meant 500 and 700. If you can calibrate using cf or ec values, try that and then see if ppm agrees using 700 factor instead of 500

 

[marx2k]

No, unless it says another ppm value.

I just check where my RO water is at, usually 10ppm then go from there.

My calibration thingy on my TDS busted so....................

I would just be careful since over time the PPM in your RO water will raise as the filter gets older and older.

Then again, Ive had my RO for a year and it started with 12ppm and is still 12ppm. These things are the best investment EVER! (as for as water goes)