Hi Trem and stuff, The PWT is still strange to me. I still do not know what to think of it. But previously I talked about the conductance of the DW water (in microSiemens). In general, the conductance (in Siemens) is reciprocal value to the resistance (in ohms) of any substance being measured. So, any water tested by any ohmmeter (but with the only really standardized electrodes !!) which shows the resistance of e.g.10megaohms (=10,000,000 ohms) has conductivity of 1/10,000,000 = 0.0000001 Siemens. ...That is 0,1 microSiemens. So we can go on, etc. It is nothing special to measure 20 megaohms with almost all ordinary multimeters ...and we have 0.05 microSiemens value at once. The only problem for the measurement is not to allow the chemical processes to get started during the measurement (measuring voltage applied). So the AC and small voltages are being used to kill any electrochemical processes ( = not to change the electrode dimensions by electrolysis - they are really very strictly given). So, during the conductance measurement: you just carry out the DW resistance measurement which is interpreted in microsiemens as conductivity on the display. Nothing more is done. Just realize how the readout of 1,22 microSiemens is much transparent than : 819,672.13114754098360655737704918 ohms of the value... As you see, the measured resistance has much more decimal places, that may be comfortable to you, and... it represents the absolutely exact 1,22 microSiemens value of conductivity with only two decimal places. We must also realize that it applies also vice-versa: the 1.80 megaohm of resistance represents exactly : 5,55555555555555555555555555555556*e-8 of microSiemens on conductivity. How silly. Isn´t it? So forget: the more decimal places does not always mean the more accuracy. As to the actual PWT meters (and others): any quantity can be measured up to such accuracy, as we are able to measure it ( = how good our meter is ). So if the PWT meter you just have has only one decimal place, it is maybe just a meter for such a kind of measurements, where such a readout on decimal places is quitely sufficient. And it also maybe is sufficient for the almost majority of all other purposes. What more to say? I had a very high sophisticated HP digital voltmeter with some 16 decimal places of the readout in my laboratory. The only question is, who appreciates. Pavel H.
> As I mentioned earlier....the PWT meter CANNOT read to three decimal places. > It can only show tenths, not thousandths. > > Trem > > ----- Original Message ----- > From: "Stuff" <[email protected]> > To: <[email protected]> > Sent: Sunday, April 18, 2004 7:35 AM > Subject: [silver_list] Re: CS>Re: CS Question x DW problems > > > > At 07:46 AM 4/17/2004 -0300, sandee wrote: > > >Hi There Pavel - from my understanding and ex- > > >perience the "distilled water" sold in gas stations > > >is really deionized water and as you rightly state has nothing to do with > > >steam distillation. Properly distilled water reads .000 on a PWT from > > >Hanna. So take your tester with you before you purchase !!!!! > > > > > > Agreed but where do you buy DW that reads .000 on a PWT? > > > > What's the brand name? > > > > stuff > > > > > > -- > > The Silver List is a moderated forum for discussing Colloidal Silver. > > > > Instructions for unsubscribing are posted at: http://silverlist.org > > > > To post, address your message to: [email protected] > > Silver List archive: http://escribe.com/health/thesilverlist/index.html > > > > Address Off-Topic messages to: [email protected] > > OT Archive: http://escribe.com/health/silverofftopiclist/index.html > > > > List maintainer: Mike Devour <[email protected]> > > > > >
