Right On Buddy !!!!!!!!! A precicly known resistive load should be ideal for calibration !!! Because I live in Rhode Island, Hanna Instruments is a local call for me. I will find out exactly what ohm & tolerance level of resistor to shunt across the meter leads, and exactly where to obtain these given resistors... etc... My guess is that a simple radio shack resistor will do, as long as the (+/-) tolerance is able to produce a small PPM error zone... Say @ 3-5 ppm, would be ok I think...
Regards, Alexander ----- Original Message ----- From: "Ode Coyote" <[email protected]> To: <[email protected]> Sent: Saturday, June 07, 2003 10:08 AM Subject: Re: CS>cheap ppm tester > It would be interesting to know what was used as a benchmark. > Apparently, some benches are of different heights and some look more like > counters. > I would trust a benchmark based on electrical conductivity of a known > [solid?] substance rather than some dubious liquid solution. > Typically a PPM meter will read half that of a microsiemens meter such > as the PWT. > > Ode > > At 06:21 AM 6/7/2003 -0500, you wrote: > >My TDS -1 reads from 0 to 999 not 0 to 2000 and it is calibrated to > >measure homemade CS. > > > >Jim > >>The TDS-1 from Hanna Instruments is a good bit cheaper, but it reads > >>from 0 to 2000 ppm. You'll be using it at the *very* bottom of its > >>range, which means the accuracy will not be tremendous. Sorta like > >>measuring grains of sand with a yardstick. Do you see what I mean? > > > > > > > > > >-- > >The silver-list is a moderated forum for discussion of colloidal silver. > > > >Instructions for unsubscribing may be found at: http://silverlist.org > > > >To post, address your message to: [email protected] > > > >Silver-list archive: http://escribe.com/health/thesilverlist/index.html > > > >List maintainer: Mike Devour <[email protected]> > >
