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Thread: Tf100 vs speedstir measurements

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    Tf100 vs speedstir measurements

    I put 25 mm water in tube that came with the TF100 and then dumped it into the tube that came with the speedstir and it was very different. Same with the 10mm. My question is which tube should I be using for accurate results.
    Sue from Maryland
    13, 000 gal. 24 foot round pool, vinyl, in-ground (no main drain), Hayward sand filter, 3/4 hp pump, Aquabot s2-50

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    Re: Tf100 vs speedstir measurements

    Quote Originally Posted by ennazus View Post
    I put 25 mm water in tube that came with the TF100 and then dumped it into the tube that came with the speedstir and it was very different. Same with the 10mm. My question is which tube should I be using for accurate results.
    That is puzzling. I just repeated your experiment with my TF-100 chlorine tube and the one that came with my speed stir. They were the same. You are taking your measurements before adding the magnetic stir bar correct?
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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    Re: Tf100 vs speedstir measurements

    Yep without the bar.
    Sue from Maryland
    13, 000 gal. 24 foot round pool, vinyl, in-ground (no main drain), Hayward sand filter, 3/4 hp pump, Aquabot s2-50

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    Re: Tf100 vs speedstir measurements

    Can you share with us the difference in ml between the two if they aren't the same?
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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    Re: Tf100 vs speedstir measurements

    Are both TF tubes (chlorine only and general use) producing different results than the speedstir?
    COMPLETED BUILD THREAD - 15'x29' rectangular offset shotcrete pool; 14,100 gal; 5'x7' raised spa with 400k btu fire feature; 7' spillover; 25' leuder stone raised bond wall w/waterfall; Pentair SWG; Pentair VS (pool); Pentair 3/4hp feature pump; 1hp spa blower; Pentair Cartridge filter; Pentair “Easy Touch 8” wireless; Dolphin Oasis Z5 robot; Solar Hydronics iSwim solar panels; Mansard Screen Enclosure; walnut travertine deck; 1 very happy kiddo.

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    Re: Tf100 vs speedstir measurements

    The 10 ml mark on both tubes on the test kit come to the 11.5 mark on the speed stir. The 25 ml mark on the tubes in the test kit are considerably over the 25 ml mark on the speed stir. I think since both the tubes in the kit measure the same its the speed stir one that's off.

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    Quote Originally Posted by txnole View Post
    Are both TF tubes (chlorine only and general use) producing different results than the speedstir?
    Yes bot kit tubes measure the same and differ from speedstir.
    Sue from Maryland
    13, 000 gal. 24 foot round pool, vinyl, in-ground (no main drain), Hayward sand filter, 3/4 hp pump, Aquabot s2-50

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    Re: Tf100 vs speedstir measurements

    I just pulled out my Taylor calibrated cylinder and the standard cylinder from the TF-100 kit and my Capp Rhythm Repeater stepper pipette. The bottom of the meniscus was very close to the 10 and 25 ml marks on the Taylor cylinder, whereas the top of the meniscus didn't quite reach the 10 and 25 ml marks on the TF cylinders. I would have to say the Taylor cylinder is more accurate. The precision of the 2 TF cylinders to one another doesn't mean they are accurate.
    TF-100 kit, SpeedStir, Sample Sizer. Still in early stages of pool planning

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    Re: Tf100 vs speedstir measurements

    I just took out my brand new just delivered tf100 kit and new speedstir and did the. 10 mm measure on both tf cylinders and poured into speedstir cylinder [without stirbar] and low and behold 10ml measured in the tf cylinders comes out to over 11.5 on speedstir cylinder!! I also confirmed by measuring out 10mil with a known good measuring pipe.
    What gives ..this will throw off these relatively precise tests?? Should I throw out the speed stir cylinder and can I use the tf cylinders on the speed stir?
    PS I am awaiting a call back from Wayne in tech support with Taylor to see what's up..I will post back here!
    Last edited by FirstVallartaPool; 07-11-2016 at 10:49 AM. Reason: More
    Pool 3800 gaĺlon glass tiled concrete approximately 10 years old/ Puerto Vallarta
    Hayward sand filter S166t.
    Pool Pump Silver10/1115 1hp
    Heat siphon Sx3.25hp
    Hard Municipal Water tf-100 test kit

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    Re: Tf100 vs speedstir measurements

    Quote Originally Posted by FirstVallartaPool View Post
    I just took out my brand new just delivered tf100 kit and new speedstir and did the. 10 mm measure on both tf cylinders and poured into speedstir cylinder [without stirbar] and low and behold 10ml measured in the tf cylinders comes out to over 11.5 on speedstir cylinder!! I also confirmed by measuring out 10mil with a known good measuring pipe.
    What gives ..this will throw off these relatively precise tests?? Should I throw out the speed stir cylinder and can I use the tf cylinders on the speed stir?
    PS I am awaiting a call back from Wayne in tech support with Taylor to see what's up..I will post back here!
    If the accuracy of the test results rely on an accurate 10 mL sample of water, you should be using the Taylor cylinder. I spent a pretty penny on that repeating pipette, it should be pretty accurate for anything we do.
    TF-100 kit, SpeedStir, Sample Sizer. Still in early stages of pool planning

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    Re: Tf100 vs speedstir measurements

    My kit is 1 year old & also shows 10 & 11.5 in the two different cylinders. If you look at the black 5 ml line on the TFT cylinder you see it's up higher than it should be. I wouldn't be too concerned about it though, the reading would only be off about 10%. Even at shock levels that's less than 2 ppm for most of us.
    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
    TF-100XL Test Kit with SpeedStir

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    Re: Tf100 vs speedstir measurements

    I just compared the Taylor cylinder with the TF-100 and got 10 ml with both. If you do notice a difference, please email me at tftestkits@gmail.com so we can fix it. Rebecca

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    Re: Tf100 vs speedstir measurements

    Not sure what you mean exactly we are discussing the measurement markng being off on the speedstir cylinder only. Wayne in tech Support is looking into it He was quite surprised to find out as this was the first call he took on it. I speculated the measurement markings were calculated with a flat bottom erroneously and the dimple on bottom is what has thrown off the measurents.
    Again I will post back what happens here to follow up.
    Pool 3800 gaĺlon glass tiled concrete approximately 10 years old/ Puerto Vallarta
    Hayward sand filter S166t.
    Pool Pump Silver10/1115 1hp
    Heat siphon Sx3.25hp
    Hard Municipal Water tf-100 test kit

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    Re: Tf100 vs speedstir measurements

    On a recent thread I also mentioned that the Speedstir cylinder was off.
    1200 Sq Ft 41,000 Gal. Gunite, JANDY SVRS VS pump, JANDY JXI 400,000 BTU, Polaris 280 w/ 3/4 BP, Rockwall and Grotto (w/6 jets and blower), 2 JANDY Lam Jets, 2 LED Bubblers, 5 Ledlights, AQUALINK P16 RS, 90% Quartz, SWF 185 GMP BP, SWF 125 BP, Levelor K1100 Autofill, AP Digital SWG, 2 skim and 5 returns, and mostly 3 inch piping

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    Re: Tf100 vs speedstir measurements

    I have the tf100 and I am wondering WHAT IS THE SPEEDSTIR CYLINDER??? I do have the speedstir Thank you
    pool 11-14,IG 16,500G 4ft to 6ft Quartz Tahoe Blue Pentair equip VS pump cartridge filter IC40 SWG Heat Pump Hayward Shark XL Robotic Eagle Point, Or

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    Re: Tf100 vs speedstir measurements

    Quote Originally Posted by FirstVallartaPool View Post
    Not sure what you mean exactly we are discussing the measurement markng being off on the speedstir cylinder only. Wayne in tech Support is looking into it He was quite surprised to find out as this was the first call he took on it. I speculated the measurement markings were calculated with a flat bottom erroneously and the dimple on bottom is what has thrown off the measurents.
    Again I will post back what happens here to follow up.
    The cylinder that comes with the Taylor SpeedStir is the Taylor 9198. If anything, the measurement on the one from the TF-100 kit is off as the bottom of the meniscus is at the 10 mL line on the Taylor, whereas the top of the meniscus is below the 10 mL on the TF-100 cylinder.

    - - - Updated - - -

    Quote Originally Posted by Paulette View Post
    I have the tf100 and I am wondering WHAT IS THE SPEEDSTIR CYLINDER??? I do have the speedstir Thank you
    The SpeedStir cylinder is the clear plastic cylinder that came with the SpeedStir, it has no black lines marking the graduations.
    TF-100 kit, SpeedStir, Sample Sizer. Still in early stages of pool planning

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    Re: Tf100 vs speedstir measurements

    The SpeedStir cylinder is the cylinder that came with the SpeedStir and has the magnetic bar that you drop into it.

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    Thanks for posting the discrepancies. I've always used the cylinders from the TF-100 kit for my measuring because they are much easier to read that the SpeedStir cylinder because of the black lines.
    Marla
    No longer living vicariously through other people's pool builds. Pool build is complete on my IG SWCG pool, approx 10,000 gallons. All Jandy equipment - VS 1.5 hp pump, 580 cartridge filter, AquaPure 1400 salt cell, AquaLink PDA system. Dolphin m500. PebbleSheen Blue Surf with shells and beads added. TF-100 w/ SpeedStir. A Houston Pool Build Inside the Loop

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    FirstVallartaPool's Avatar
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    Re: Tf100 vs speedstir measurements

    When I measured with a known sample size both of my tf100 cylinders were spot on accurate however the speedstir cylinder part#9198 was significantly off.
    Pool 3800 gaĺlon glass tiled concrete approximately 10 years old/ Puerto Vallarta
    Hayward sand filter S166t.
    Pool Pump Silver10/1115 1hp
    Heat siphon Sx3.25hp
    Hard Municipal Water tf-100 test kit

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    Re: Tf100 vs speedstir measurements

    Just checked my speed stir with the k-2006 and seems to be fine.
    24' x 52" VINYL AG 15,200 GAL.
    HAYWARD POWER FLOW LX 1.5 HP
    HAYWARD SAND FILTER
    Taylor K-2006

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    Re: Tf100 vs speedstir measurements

    Cylinders 1 and 2 are the ones found in the TF-100 kit. Cylinders 3 and 4 are found in the SpeedStir and K-1766 kits. 1, 2, and 3 were filled using my Capp Rhythm Repeating Pipette with a 25 mL tip on dispense setting 4 (2,000 uL per press). I depressed the dispense button 5 times, totalling 10,000 uL or 10 mL. Cylinder 4 was filled to an arbitrary amount above 10 mL and the Taylor Sample Sizer was inserted and then gently removed. I lined up all 4 cylinders and took the picture. The results are there for you to interpret.

    For information on the Capp repeater: Capp Stepper Pipette. Maintenance free Repetitive Pipette.

    Cylinders


    Repeater
    TF-100 kit, SpeedStir, Sample Sizer. Still in early stages of pool planning

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    Re: Tf100 vs speedstir measurements

    Quote Originally Posted by brims View Post
    I just pulled out my Taylor calibrated cylinder and the standard cylinder from the TF-100 kit and my Capp Rhythm Repeater stepper pipette. The bottom of the meniscus was very close to the 10 and 25 ml marks on the Taylor cylinder, whereas the top of the meniscus didn't quite reach the 10 and 25 ml marks on the TF cylinders. I would have to say the Taylor cylinder is more accurate. The precision of the 2 TF cylinders to one another doesn't mean they are accurate.
    This was the exact same situation as my cylinders. I tossed all the TF cylinders and only use the calibrated Taylor cylinders along with the Taylor Sample Sizer.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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