The Science Company in Denver stocks several models, and very inexpensive too. I would strongly suggest spending the few extra dollars for one that has automatic temperature correction.
http://secure.sciencecompany.com Search on "tds" and you'll find lots there. If you search "tds meter" you'll only get one result. I have the bright blue TDS-EZ and it works fine, but does not have ATC so I have to do a little math. Allen, I would argue that using the meter for very small measurements makes it even more critical to calibrate it, because any variance is a much higher percentage of your reading. Same place sell calibration solution for a few bucks. tx, bmc "Faith will move mountains, but you'd better bring a shovel....." > From: Allen Worrall <[EMAIL PROTECTED]> > Reply-To: <[email protected]> > Date: Mon, 6 Oct 2008 08:09:13 -0800 > To: <[email protected]> > Subject: Re: Toggle Power Switch > > > A TDS meter. www.tdsmeter.com > > Model TDS-4. I do not remember where I purchased it, but it was on-line, and > I think from an aquarium supply company. It is made by a company called HM > digital. They also make a model TDS-4TM which I think has a thermometer in > it. It can be calibrated if you can find a calibration solution. All the > calibration solutions I saw were at a much higher level of TDS than what I > am measuring, and I did not think that would be worthwhile, so I have never > calibrated it. For the purposes I am using the meter, I do not think high > accuracy is necessary. > > Allen > -------------------------------------------------- > From: "TWG" <[EMAIL PROTECTED]> > Sent: Monday, October 06, 2008 5:53 AM > To: "Brewtus" <[email protected]> > Subject: Re: Toggle Power Switch > >> >> How do you measure TDS? >> >> On Oct 5, 3:06 pm, "Allen Worrall" <[EMAIL PROTECTED]> wrote: >>> I work the same way. My timer is an Intermatic Heavy Duty Model TN311 or >>> maybe it is Model TN3II. It is a mechanical timer and works well. I also >>> rarely use the red on-off switch on the front of the machine. As Ray >>> said, I turn it off when I go on vacation, but I also use it when I >>> partially drain my steam boiler, which I do once a week on Sunday >>> morning. In addition to the Cafiza blind portafilter treatment, I turn >>> off the red switch, run about 200-300 cc of boiling water out of the hot >>> water valve of the machine, then turn the red switch on and allow the >>> pump to pump new water into the steam boiler. >>> >>> I do this of course to try to keep the TDS (Total Dissolved Solids) in >>> the steam boiler low, to minimize scaling. I put distilled water into my >>> water reservoir, and add just a little tap water to make the TDS reading >>> about 10-20 PPM. I find that is enough to allow the sensor in the steam >>> boiler to work. This morning the TDS reading of the water I removed from >>> the steam boiler was 110 PPM (I allow it to cool before I measure the >>> TDS). My tap water is 250-275 PPM TDS. >>> >>> Allen >>> >>> From: Ray Sachs >>> Sent: Sunday, October 05, 2008 9:01 AM >>> To: [email protected] >>> Subject: Re: Toggle Power Switch >>> >>> If that timer is on backorder, the are plenty of other good ones out >>> there. I'm not sure what make my timer is, but its been working >>> flawlessly for a couple of years now. Those things aren't exactly rocket >>> science these days. Most wristwatches are more complicated. Every day the >>> machine is on and warmed up when I come downstairs to make the first >>> shots. It either turns off by itself at 1 pm or I turn it off manually >>> sooner. The only time I touch the on-off switch on the espresso machine >>> is when we're leaving town for a day or few or longer. Then I flip it off >>> so the timer won't turn it on everyday while we're gone. Otherwise, I >>> never hit that switch. >>> >>> -Ray >>> >>> On Sun, Oct 5, 2008 at 1:18 AM, mpsadeghi <[EMAIL PROTECTED]> wrote: >>> >>> Thanks for the informative reply and for the advice, Brewtus Maximus! >>> This is great! Seems like the right way to go so I took you up on >>> your recommendation and ordered the intermatic. They're on back order >>> but I'll let you know how it goes when i get it set up. I hadn't read >>> the reviews about the melting red rocker switches and am now thankful >>> that i have my simple switch...which heck, isn't so bad to look at >>> after all. And i do agree, especially after today's maiden voyage, >>> simpler interface is better. By the way, the maiden voyage was so fun >>> and rewarding once I got things dialed in. Coming from a little, putt- >>> putt Francis Francis, when I pulled the lever up on my Brew2, it was >>> like turning the lights on to a vast, new world! Ha! Again, I >>> appreciate the guidance and insight! >>> >>> buzzing from all the test pulls, >>> >>> Marc >>> > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Brewtus" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/brewtus?hl=en -~----------~----~----~----~------~----~------~--~---
