I intend to monitor temperatures at several positions inside and on the outside of a cryo liquid storage vessel which will be pre-cooled by liquid nitrogen (-196°C) and then filled with liquid helium (-269°C).
Is this possible by using a TC-08 in combination with type K thermocouples within a reasonable resolution, let's say of about 1°C?
The ouput of such a thermocouple at -269°C is about -6.5 mV what is well within the range of the voltage measurement of the TC-08 and also within the range of conversion of type K voltages to temperatures, according to the specifications. I'm not so much concerned about the accuracy (of absolute readings), but more about the resolution. At -269°C the sensitivity of type K thermocouples drops (from about 40 µV/°C around room temperature) to about 1 µV/°C.
My question now: what is the resolution in voltage measurements of the TC-08 (in µV)?
There are a number of thermocouples that can measure this temperature range, E, K and N type thermocouples. E type thermocouple tend to perform a little better at lower temperatures, but I would do research on which of these thermocouples is best suited for you.
In terms of the uV resolution for the USB TC08 it would be 0.149uV.
I hope this helps, if you have any further questions please do not hesitate to contact me , kind regards.
I am an engineering student.
I have a Pico Technology TC08 (USB) and in my studies I have to simulate his properties in LabVIEW.
I need an example of function "usb_tc08_get_temp" in LabVIEW because I do not know where and how the buffer was saved.
If you do a custom installation or re-install the software and select the programming examples as shown in the file attached. This will create programming examples located by default in the following location
I have already re-installed the software and did everything you told me but the only LabVIEW example i found was the usbtc08.vi. This VI only demonstrates the use of the get_single function. I need a VI that uses the get_temp function, i.e. that uses streaming mode.
Best regards,
Adriana Gomes
ziko wrote:Hi and thank you for your post.
If you do a custom installation or re-install the software and select the programming examples as shown in the file attached. This will create programming examples located by default in the following location
We cannot help you write your own code but what we do is provide examples and description of the function calls. If you have a look at the manual this will provide a description of the function calls, the get_temp function is described in page 26 of our manual (27 in adobe).
If you have a specific question then I may be able to help you.
The attached file will show you how to use the USB TC-08 using the usb_tc08_get_temp method of collecting the data. Let me know if you have any questions...
I need to save more samples per secunde with 8 channels in LabVIEW like I can save when I use the PicoLog Record.
I have the file usb_tc-08_stream_71.vi, but the results are different that I get in PicoLog.
I would like to know how can I get the same results with a vi.
I hope you can help me.