[Jack Judd]

Hi everyone.  New to the forum, new to window cleaning with the wfp and new to the vito van.  My TDS metre reading is going from pppm one minute to 38 the next and then on to 25 the next.  It is a new TDS metre.  Has anyone ever got such inconsistent readings from the same water and if so does anybody know what i is.
Really gratefull for any help.
Cheers in advance  Jack   

[Avo]

Sounds like the tds Calibration needs setting..

[Andy Prittchard]

Fawlty battery.