TDS meter calibration

[seaham358]

What can I use to recalibrate my TDS meter?

[foxstop]

Premium Aquatics and Marine Depot both sell TDS calibration fluid. I believe mine calibrates with 800PPM fluid. I'm not sure if there's a difference between cal fluids.
Here's the link on MD's site: http://www.marinedepot.com/md_viewItem.asp?idproduct=RO1353

Brian

[masterswimmer]

The TDS meter I got from AquasafeCanada never requires recalibration.

Russ

[Tomzpc]

Bob,

While I'm certainly not an expert on the subject, I don't think that calibrating TDS meters for our purposes is all that necessary. The difference between 0 ppm and say 20 ppm in our make-up water is really no big deal, considering that most of the stuff we strip from the water with our RO/DI's isn't bad to begin with.

That being said, I apologize for not having a direct answer to your question. ;p

[seaham358]

I ask this because my batteries went dead and now when I test my water it is 0 when I know my DI is old and should be around 7-8 and my tap water is 2 when it should be 180-200. So either the TDS is broke or it needs to be calibrated.
So in my case it is necessary to calibrate.

[andro]

Bob, you could borrow my TDS meter to see what readings you get.

-Ian

[skearse]

I've got a backup to check for TDS and some 1382 ppm cal fluid (Hanna hand held meter). Let me know if you want to use it; I could probably stand to cal mine as well.

[seaham358]

Thanks....... the directions on mine say use cal fluid of 800. I guess I'll have to buy some. Ian I will take you up on that offer I'll call you this week and ill just swing over with some fresh made water.

[andro]

Not a problem Bob, I'll be here most likely, just give me a ring first.

-Ian