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PRT Utility
This page should be used with Netscape 4.0, Internet Explorer 4.0 or later.
It can convert resistance values to temperature for 100-ohm platinum resistance thermometers, at best it will agree with IEC-751 values to the order of 0.01C from -200 to 850C.
The default coefficients are those specified in IEC-751 (1995). If you enter resistance / temperature data for a particular thermometer then probe specific coefficients can be calculated. The accuracy will vary for particular probes and the suitability of the user entered data.
IEC 751 permits a tolerance at 650°C of 1.45°C for Class A and 3.6°C for Class B, with suitable input data and a reproducible probe the utility could be expected to provide agreement to the order of 0.1°C or better for small temperature ranges.
After entering data you can store the information for subsequent visits to the page.
For higher accuracy and for use with ITS-90 Equations we would recommend our "Deadalus" software.
DISCLAIMER
It is the responsibility of the user to ensure the validity of all calculated data. We accept no responsibility for any errors caused by inappropriate use, incorrect set up or any other cause; including defects in the software.NO OTHER WARRANTIES, EXCEPT AS STATED ABOVE. The "web page" and documentation is provided "as is" without warranty of any kind and no other warranties (either expressed or implied) are made. We do not warrant, guarantee or make any representations regarding the use or results of the use of this utility or documentation and does not warrant that that operation will be error free.
In no event will the author, Isothermal Technology Ltd, its employees, agents or other associated people be liable for direct, indirect, incidental or consequential damages, expenses, lost profits, business interruption, lost business information or other damages arising out the use or inability to use.
Results with Default Coefficients
IEC 751: 1995
Input, Ohms |
Web Page Result, °C |
Expected, °C |
18.52 |
-200.01 |
-200 |
39.72 |
-150.01 |
-150 |
60.26 |
-99.99 |
-100 |
80.31 |
-49.99 |
-50 |
100 |
0 |
0 |
119.4 |
50.01 |
50 |
138.51 |
100.01 |
100 |
157.33 |
150.01 |
150 |
175.86 |
200.01 |
200 |
194.1 |
250.01 |
250 |
212.05 |
300 |
300 |
229.72 |
350.01 |
350 |
247.09 |
399.99 |
400 |
264.18 |
450 |
450 |
280.98 |
500.01 |
500 |
297.49 |
550.01 |
550 |
313.71 |
600.01 |
600 |
329.64 |
650 |
650 |
345.28 |
699.99 |
700 |
360.64 |
750.01 |
750 |
375.7 |
799.99 |
800 |
390.48 |
850 |
850 |
COPYRIGHT 1999: If you would like to use this utility on another web page please email webmaster@isotech.co.uk for further information.