Hello, I have a Hanna TDS 1 dissolved solids meter - a cheapy. I chose Hanna HI 7033 conductivity calibration solution 84 uS/cm @ 77 F/25 C. It is closest to the range of water hardness in my area. The 84 tranlates to 42 ppm. Dennis ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, October 07, 2008 9:49 AM Subject: Re: Toggle Power Switch
> > I have not looked at this for more than a year, but I recall that the > calibration solutions or standards were in the 500-1000 PPM range, and I > did > not think that would be helpful when I wanted to measure more in the 20-50 > PPM range. I shall get a calibration solution of Na Cl . > > Allen > > -------------------------------------------------- > From: "Ben McCafferty" <[EMAIL PROTECTED]> > Sent: Tuesday, October 07, 2008 5:57 AM > To: <[email protected]> > Subject: Re: Toggle Power Switch > >> >> 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 -~----------~----~----~----~------~----~------~--~---
