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View Full Version : calibrating HM Digital DM-2 Deluxe In-Line Dual-Probe TDS Meter


royvoss
01/26/2017, 07:31 AM
hi,

i have two of these units ( http://spectrapure.com/TEST-KITS-METERS/CONDUCTIVITY-TDS-METERS/HM-Digital-DM-2-Deluxe-In-Line-Dual-Probe-TDS-Meter i purchased awhile ago to replace the ones on my uhe unit, i broke one of the dm-1 ones, figure i would upgrade to these, fastward a year later. i finally was able to get them installed. my problem is the calibration is off alittle. my other tds meter would read 150,0,0,0. always even with my maxicap system. with the new ones,i am getting 155,1,1,1 . not a big deal, how do you calibrate these or is there an adjustment on them.

thanks

Roy

SpectraPure
01/26/2017, 10:58 AM
Hi Roy,

I recommend following the manual for calibration to assure that it's reading correctly. I have provided the links below for the manual and also the calibration solution as well. Let us know if you have any other questions.

Brian in Support at SpectraPure

http://www.tdsmeter.com/manuals/dm2

http://spectrapure.com/NaCl-calibration-solution-available-as-342ppm-3oz-Bottle?filter_name=ts-342