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UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: Captain Scarlet on August 01, 2007, 08:19:12 pm

Title: TDS METERS, HOW ACCURATE ARE THEY?
Post by: Captain Scarlet on August 01, 2007, 08:19:12 pm
How accurate is this 15-20 quid tds meter?

(http://www.purelyh2o.com/images/T/tds_iii_meterbig.jpg)

are there more accurate ones, or is this accurate enough? Luke
Title: Re: TDS METERS, HOW ACCURATE ARE THEY?
Post by: NWH on August 01, 2007, 08:21:30 pm
More acurate than an inline one,i have both and my in line meter is normally 1or2 out on the higher side.
Title: Re: TDS METERS, HOW ACCURATE ARE THEY?
Post by: Captain Scarlet on August 01, 2007, 08:30:13 pm
here is some calibration fluid for tds readers, the tds makers suggest calibrating the readers weekly if they are used on a regular basis, Luke

(http://www.tdsmeter.co.uk/images/calibration_bottles.jpg)
Title: Re: TDS METERS, HOW ACCURATE ARE THEY?
Post by: john tomkins on August 01, 2007, 08:48:25 pm
Calibration fluid is ok but you must check at 25 degrees c, any side of that and you will be some way out
Title: Re: TDS METERS, HOW ACCURATE ARE THEY?
Post by: jouk45 on August 01, 2007, 08:50:15 pm
Quote from: Luke Johnson on August 01, 2007, 08:30:13 pm
here is some calibration fluid for tds readers, the tds makers suggest calibrating the readers weekly if they are used on a regular basis, Luke

(http://www.tdsmeter.co.uk/images/calibration_bottles.jpg)
i replace my old tds meter 6 months ago, seeing this thread, i looked at my meter. and there is no screw,
the whole thing is sealed. now to calibrate it . you have to open it by the screw, so have i bought a disposable one.
Title: Re: TDS METERS, HOW ACCURATE ARE THEY?
Post by: Captain Scarlet on August 01, 2007, 09:02:35 pm
jouk, go here for all your tds needs, Luke

http://www.tdsmeter.com/
Title: Re: TDS METERS, HOW ACCURATE ARE THEY?
Post by: jouk45 on August 01, 2007, 09:07:17 pm
Quote from: Luke Johnson on August 01, 2007, 09:02:35 pm
jouk, go here for all your tds needs, Luke

http://www.tdsmeter.com/
thanks luke, what i am trying to say is to calibrate your meter, it has to be opened up,
the one i have is completly sealed,
Title: Re: TDS METERS, HOW ACCURATE ARE THEY?
Post by: KarlJones on August 02, 2007, 02:08:24 am
Jo, where do you put the battery in?  Mine has a little trimmer screw behind the battery it so I am assuming that is for the calibration.  I thought it was sealed but it wasn't as the top does come off.

Other than that, calibration fluid can be used so that you know when the meter needs replacing. 
Title: Re: TDS METERS, HOW ACCURATE ARE THEY?
Post by: Captain Scarlet on August 02, 2007, 01:20:54 pm
or to use the calibration fluid to turn the screw and adjust the tds to the calibration fluids tds. Turning the screw clockwise makes the tds go up, anti clockwise, the tds goes down. Simply match the tds reading to the calibartion fluid, Luke