One experience of mine shows why you need a meter. I have always used a meter to measure the strength of my CS right after making it. It normally reads between 9 and 12, which is an approximation of the PPM of the solution. Although the actual ppm may be a bit different, I assume it is not hugely different. The important thing is the consistency of the meter from one batch to the next. I know that each of my batches is similar to all the others that I have made. One day I made a quart mason jar of CS from a new gallon of distilled water, and did my routine measurement after it was made. I was not expecting anything different as the CS was clear and did not show any cloudiness or anything. I woke up in a hurry when the meter jumped to 200 plus. Whoa, what is this? I measure it again. Still in excess of 200. I then poured water from the new gallon jug and measured that. Also in excess of 200. The water was bad. Why did my SG6 not refuse to make CS from this as it is supposed to? I don't know. It looked like it went through its normal process, although I was not really paying attention at the time. Anyway, the meter showed that this jug of the distilled water I always buy (Poland Springs) was bad. That had never happened before and has not happened again since. And that is why you need a meter and should always measure each batch that you make.
Del ----- Original Message ----- From: Neville Munn To: [email protected] Sent: Monday, March 08, 2010 7:38 PM Subject: RE: CS>Silver Meter [Any comments on this is appreciated] -Sure, here's my thoughts on the subject... [...basiclly has the same component inside as the Hanna PWT.] -That'd be their way of saying "there isn't a meter 'off the shelf' that is specifically designed to measure EIS" {without actually saying it!} cos to my knowledge...there isn't. Meters used for EIS purposes are...'guesswork using a measuring instrument'. I got three meters and none of them are 'accurate?', but they get me in the ballpark, which is only where I need to be. I know from laboratory analysis that I got more *total* silver content than all my meters show, but the meters fool me into determining *roughly* what silver content I have and that's all I need to know <g>. My question would be...How 'accurate' do you wanna be, or *need* to be? Without laboratory analysis meters are only going to get you *in* the ballpark, *you'll* have to pick the seat you think is the *best* seat once you get *in* {using all that information about meters, calculations etc etc available in the public domain}. N. ------------------------------------------------------------------------------ Date: Mon, 8 Mar 2010 04:40:56 -0800 From: [email protected] To: [email protected] Subject: CS>Silver Meter Hello, I'm looking for any thoughts on meters to check the ppm. Someone told me you needed the Hanna PWT that costs about $60. I found a Hanna Primo for half that. The fellow that told me about the PWT says he checked the Primo and it wasn't accurate. I contacted the company that sold it to me and they said it basiclly has the same component inside as the Hanna PWT. I would like to be able to be fairly certain what ppm I'm making. Any comments on this is appreciated. -Thanks Gary Native American style flutes & Matted photos by ~ Gajon ~ www.etsy.com/shop/gajon ------------------------------------------------------------------------------ Download a free gift for your PC. Get personal with Windows.
