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UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: Dave Willis on January 04, 2015, 12:50:16 pm

Title: TDS Meters
Post by: Dave Willis on January 04, 2015, 12:50:16 pm

Do they have to be recalibrated if you change the batteries?
Mine are eight years old now.

Title: Re: TDS Meters
Post by: LWC on January 04, 2015, 12:52:08 pm

Ive never re calibrated one in the whole time of using pole system

Title: Re: TDS Meters
Post by: Smudger on January 04, 2015, 12:53:49 pm

I don't think so, but worth checking

Darran

Title: Re: TDS Meters
Post by: Mick Kent on January 04, 2015, 01:50:01 pm

I have 3 tds meters and all say 000 but when the tds creeps up they all show different readings, 1 would say 002 another 006 and another maybe 020. I dont know which 1 is the correct reading so i just change resin a few fills after resin creeps up.

Title: Re: TDS Meters
Post by: Spruce on January 04, 2015, 04:26:44 pm

Quote from: Mick kent on January 04, 2015, 01:50:01 pm

I have 3 tds meters and all say 000 but when the tds creeps up they all show different readings, 1 would say 002 another 006 and another maybe 020. I dont know which 1 is the correct reading so i just change resin a few fills after resin creeps up.

You can buy calibrating fluid with a known tds and test your meter.

http://www.daqua.co.uk/calibrationfluid.htm