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UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: thompsonr on December 04, 2008, 04:54:26 pm

Title: calibration fluid
Post by: thompsonr on December 04, 2008, 04:54:26 pm: I today tested my tds meter in 20ppm calibration fluid.I t read 25ppm --5ppm out.
I future when I take a reading should I deduct 5 (ie a reading of 012 would really be 007) or should I deduct 25% (ie a reading of 012 would really be 009)?
I have got di reading of 005 and this would be the difference between 000 and 003-004
Title: Re: calibration fluid
Post by: bonsey on December 04, 2008, 04:58:04 pm: just get a new tds meter ;D
Title: Re: calibration fluid
Post by: steven ainger on December 04, 2008, 05:00:10 pm: you can adjust the tds meter with a small screwdriver at the rear
Title: Re: calibration fluid
Post by: Elginn on December 04, 2008, 05:02:02 pm: Your using the wrong TDS Fluid
Title: Re: calibration fluid
Post by: steven ainger on December 04, 2008, 05:03:22 pm: Quote from: Elginn-Sparrowhawk on December 04, 2008, 05:02:02 pm
Your using the wrong TDS Fluid

why
Title: Re: calibration fluid
Post by: RSWindows on December 04, 2008, 05:05:38 pm: i may be wrong here but if you get a higher caliberation fluid like say 337TDS fluid then you can get a more accurate differential reading.
Title: Re: calibration fluid
Post by: The Seven Bays Window Cleaning Company on December 04, 2008, 05:17:06 pm: RO Man recomends using a calibration fluid nearer to the TDS you require - so a 20ppm calibration fluid is the right stuff for us.
Title: Re: calibration fluid
Post by: Elginn on December 04, 2008, 05:43:08 pm: Quote from: The Seven Bays Window Cleaning Company on December 04, 2008, 05:17:06 pm
RO Man recomends using a calibration fluid nearer to the TDS you require - so a 20ppm calibration fluid is the right stuff for us.

You better inform all the W/C suppliers who are suppling us with 342 ppm to calibrate are TDS meters with then.
Title: Re: calibration fluid
Post by: The Seven Bays Window Cleaning Company on December 04, 2008, 05:51:08 pm: Nothing to do with me - just stating what was on the Ro-Man website.
Title: Re: calibration fluid
Post by: steven ainger on December 04, 2008, 06:14:54 pm: Quote from: The Seven Bays Window Cleaning Company on December 04, 2008, 05:51:08 pm
Nothing to do with me - just stating what was on the Ro-Man website.

thats exactly what i was going to say