Topic | K Type Thermocouple Support

Home Forums Mooshimeter Support K Type Thermocouple Support

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    • #2664 Reply
      10000degrees
      Guest

      Hello,

      Are there any plans for, or would you consider adding a selection for K type thermocouples? They are cheap and readily available and it’d be a lot easier to have a direct Celsius and Farenheight reading instead of mV conversion. I’d like to recommend this product throughout my company and others, this feature would be a must-have before guys would spend their money. I am an electronics and appliance field service technician and also a trainer in my field. I really enjoy the capabilities of my new meter!

      I’ve looked through the blog and instructions and haven’t found anything about an external temperature sensor setting. I need the speed of a simple plug in type and the ability to read up to 500 F, don’t wanna melt the case of my new meter! And… The most commonly spaced, double banana plug adapter for yellow polarized thermocouple plugs, fits right into the Mooshimeter- Score!

      Thank you, Great Product!!!
      Jerry

    • #2728 Reply
      Anonymous
      Guest

      I can second this. The TC logging was a large reason I purchased this meter. I finally got around to trying to measure a K Type TC and discovered that the TC measurement was for the internal TC only. If it can read an internal TC why can’t it read an external TC on the Aux DC input?

      The 60k goal from dragon innovation states “Right now our app reports shunts, clamps, thermistors and thermocouples in native units, and everything else in measured units.”

      Also, thanks for getting the logging feature out there, now I just have to find my micro sd card…

    • #2735 Reply
      Anonymous
      Guest

      I will third this request. It would make this product even more versatile!

    • #2755 Reply
      Anonymous
      Guest

      I also would like to see this happen. In fact what I would like to see is a user scalable selection for all this devices. Something like 1mv = 1 PSI, 1 Degree F, 1 Degree C, or other units of measure that the user inputs. I wouldn’t think this would be very hard?

      Also I’d like to be able user selectable turn off channel 1 or 2 permanently for graphing unless I need it instead of having to do it every time as I would guess a majority of the time people are only using 1 channel.

      How about not shrinking to fit the time on the graph. Make that a 5-10 second display and the user can scroll back and forth from past to real time.

      You’ve got a great product here but the software can take it to the next level…

    • #2757 Reply
      Anonymous
      Guest

      The capability to measure thermocouples as a temperature would be very useful for me, too. Possibly a ‘table’ of thermocouple types that could be selected from, in case I get stuck with the Pt1000 in stead of the K type in equipment…

    • #3170 Reply
      Anonymous
      Guest

      Support for K couples would be great since they are the most common.
      However implementing would be a pain in the ass.

      Problem 1:
      This is because thermocouples measure the temperature DIFFERENCE (Seebeck effect) and not the absolute temperature. To get the absolute temperature you have to measure the cold junction (right at the connector) as well and compensate in the mV scale.
      Besides that, 1mV is not 1 degC unfortunately.

      Problem 2:
      I doubt if the Mooshimeter has enough stable digits to make temperature useful. Since a K couple has sensitivity of approximately 41 µV/°C

      Problem 3:
      The curves of thermocouples are not linear you have to compensate in the lower range and the higher range with coefficients.
      These are a little bit different for every couple but not very important for low-end measurements.

      See en.wikipedia.org/wiki/Thermocouple if you want to know more.
      Also interesting: en.wikipedia.org/wiki/Triple_point
      This is a very accurate reference at exactly 0.01 degC in which water consists in all 3 phases at the same time. (ice, water, vapor)

    • #3198 Reply
      Anonymous
      Guest

      Hi Vortexico,
      difficulties to acquire a thermocouple are clear, but this was a planned feature for mooshimeter (see page on dragoninnovation) and to be honest one of main reasons for me to buy this device.
      PS. Cold junction compensation is hw wise simple, mooshimeter has an embedded thermosensor on pcb.
      Regards
      Armando

    • #3199 Reply
      Anonymous
      Guest

      Vortexico,

      I understand your concerns with thermocouple accuracy and readability by the Mooshimeter. I brought this feature up because I believe that the capability is well within Mooshimeter’s abilities. There are a lot of el-cheapo handheld DMM’s out there that have this feature and they are generally accurate to within a few degrees, which is close enough for most user’s needs. For instance, the appliance industry uses this DMM feature on a daily basis. Refrigerators and different cooking appliances are measured frequently, I personally perform this type of measurement several times per work day. I currently whip out my Mooshimeter in my customer’s homes for frequent voltage, resistance, and current measurements and the more educated and worldly of them pretty much freak out- they have never seen a product like this and ask many questions. They are totally blown away and impressed!

      Simply adding a “standard” set of pre-programmed tables (even better, allow calibration) that offer usability to the most common, off-the-shelf thermocouples and BAM… Just knowing that 1 degree Celsius is .059 mV is fine, attempting to memorize a chart up to 500 degrees Fahrenheit is not. IMO cold junction compensation is not generally required in most applications- I believe that there would only be a very small percentage of users who would need that level of accuracy- ever. Most users would not need a .001° C resolution. Measurements like that are usually taken in lab settings within a very controlled environment with very specific requirements and for highly specialized reasons. Just not what I believe the Mooshimeter was intended for, however, compared to the average DMM offering, this device is freaking off the chain.

      And….

      High Precision Voltage:

      Up to 100mV with <15nV per count resolution
      Up to 1.2V with <200nV per count resolution

      I think that covers the thermocouple readability and usability.

    • #3249 Reply
      Anonymous
      Guest

      I would like to +1 this as well. Currently in the middle of a project were I need to read from a dependable temp sensor(thermocouple) to establish the resistance at a given temp of a group of thermistors. Being able to log the resistance on one channel and the thermocouple temp on another while I run a heater block through its temp range would make my life far far easier than the process I have currently.

    • #3288 Reply
      Anonymous
      Guest

      I’ve gotten this to work by hacking up the Android app, (I was using T-type as that’s what I had lying around) but I ran into issues where switching back to voltage mode crashed the app. This is definitely doable, though possibly only on the app side.

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