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Thread: Digital thermometer for Scace device

  1. #1
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    Digital thermometer for Scace device

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I have just acquired a second hand Scace device.*It would seem that they require a T-type thermocouple (I have a dig. therm. with a K-type fitting).*Does any other CSer use a Scace & with what thermometer?

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    Re: Digital thermometer for Scace device

    There is some reading around (search Home Barista) as to why he used a T type and it is for accuracy over the K types. Most of the better Fluke range of meters will handle these and these days bound to be some out of Asia on the bay of evil.

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    TC
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    Re: Digital thermometer for Scace device

    Hi BH,

    I used it both with a Fluke 54-II and with the CS multimeter (using the old adaptor)

    In back to back tests, I really couldnt see any significant difference between the logged Fluke files*and the real time CS multimeter traces. These days, I tend just to use it with CS gear. To log the Fluke, you need Flukeview Forms and their serial/IRDA cable- which is very reluctant to talk to most serial/USB adaptors. This represents big bucks and is super fiddly. Yes, they make a USB interface for Flukeview software and nope, it wont talk to 50 series thermometers. The thermometers will also only log a set of readings, but cannot produce a real time curve. ::)

    If you want absolute accuracy- say to calibrate machines to WBC specification, I think youd need the Fluke or something else suitable. That said, I am no probe expert by any means.* :-/

    Cheers

    Chris

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    Re: Digital thermometer for Scace device

    Thanks Talk Coffee. When you say the CS multimeter I take it you mean:

    http://beanbay.coffeesnobs.com.au/ViewProduct.aspx/318-usb-temperature-data-logger

    If so what adaptor do you use?

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    Re: Digital thermometer for Scace device

    Gday BH

    BF is right, T-type is more accurate than K-type +/- 0.5 vs +/- 1.5

    Talk Coffee is also right in that there are no significant variance.

    I recently had the same conundrum as you...

    Just received a Scace 2 and we are seeing little variance between readings on a Fluke and my old Digitech QM1323.

    The ramp rate between T and K is similar probably suggesting a reason for little variance. From tests done so far we are seeing 0.1 or 0.2, but it has just arrived so more testing will be done (4 of us went in for it).

    I may try the CS DMM and see what I get but I am sure it will replicate Talk Coffees result.

    Like Talk Coffee, I dont profess to be a probe expert :-?, but I have a few elec eng and metallurgists at my disposal.... ;)

    And they own coffee machines :)

    Chris

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    Re: Digital thermometer for Scace device

    Gday BH....

    It all comes down to the specific application as to which thermocouple type(s) is/are most appropriate which includes an assessment for measurement accuracy and repeatability. Theres some good information regarding thermocouples at this site here and if you head to this page, there are links which take you to the performance tables for each type of thermocouple, you can see that the T type and K type do follow each other relatively closely up to a point but deviate substantially once the temperature difference between junctions goes beyond 75C.

    Calibration too is an important consideration. Type K are perfectly adequate where both accuracy and repeatability is concerned, if the measuring instrument has been calibrated for use with a specific thermocouple attached to that instrument. If the thermocouple is altered or replaced, the instrument would have to be recalibrated specifically for the replacement thermocouple. In ordinary day to day usage though, none of this would be necessary.

    Anyway, have a read through the linked information which Im sure will help out. All the best.... :)

    Mal.

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    Re: Digital thermometer for Scace device

    Behmor Brazen - $249 - Free Freight
    BH

    For your info, and everyone else I guess, as we found this interesting...

    One of the co-owners of the Scace 2 just dropped by to pick it up so we did a quick temp curve test to see if the good old $35 Digitech DMM is showing something close or whether we had to build in an offset for calibration...

    Boiled the kettle and poured the just boiled water over the probe - reading 99.9 to 100.2 degrees, settling at 99.9

    Put ice in a small jug, added a small amount of water so it would just melt and did same - reading 2.2 degrees.

    Gotta love those metallurgical types ;)

    So get a DMM with temp and spade connector adaptor and try it out.

    Otherwise, the cheapest I saw a T-type temp reader was $190.

    Personally, I dont think Ill buy one ;D

    Hope this helps

    Chris



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