HM Digital COM-100 TDS, which setting?

[Cajun Reefer]

I have a HM Digital COM-100 EC/TDS/TEMP handheld tester.

When testing filtered water for TDS, which setting should I have it set on? NCl, KCl, 442 ? It does in ppm or µ.

Is it possible to test salinity with this meter? If so, which settings should I set it on. And is there a conversion I need to?

Also how accurate is this meter in measuring those items?

Thanks!
Dennis

 

[bertoni]

I think 442 is the preferred setting, but for our purposes, it doesn't much matter.

 

[Cajun Reefer]

Thanks, bertoni!

I found this article that others may found helpful.

What is TDS? by Randy Holmes-Farley