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  • 1.  Calibration - Data Sheet Template for Calibrating a Resistor

    Posted Tue February 25, 2025 06:26 PM

    I need some help understanding how I would configure a Data Sheet Template for calibrating a resistor. This is the first simple use case for calibration that I am configuring for our Cal Shop. This is a 250Ω resistor and they just check to make sure it is 250Ω ±0.03%. They will adjust the resistance if needed and retire the asset if it cannot be adjusted into spec. This resistor will be used as M&TE for other calibration work orders.

    I've tried several different methods of configuring the data sheet, but it seems I have to have an Input and an Output in order to specify a Tolerance. I understand how this is useful for pressure transducers and the like where the input might be PSIG and the output mA, but I don't understand what I should be entering for a single measurement.



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    Wesley Ellis
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  • 2.  RE: Calibration - Data Sheet Template for Calibrating a Resistor

    Posted Wed February 26, 2025 09:51 AM

    Dear Wesly, 

    I may suggest to use function checks with a True / False result. Used generally for external calibrations for that we do not have measurements. 



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    Ramzi Hadiji
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    Original Message


  • 3.  RE: Calibration - Data Sheet Template for Calibrating a Resistor

    Posted Wed February 26, 2025 12:07 PM

    Wes,

    I setup a sheet/Asset Function with the Input range being 240 - 260 Ohms, with the Range Limit -0.0075 to 0.0075 EU ohms. Then the Tolerance is checked on the Output and the Output range is also 240-260 ohms. Tolerance 1 is -0.0075 to 0.0075 EU and If exceeded is Fail. On the Cal Point record is 250 nominal and desired is 250.

    While in hindsight I might have messed up the 0.03% to EU, the form seems to accept values/reacts with Pass/Fail as I expected once on a work order.

    (I am using MAS Manage 9.0, not Maximo 7.6)



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    John Q. Todd
    Sr. Business Consultant
    Total Resource Management
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    Original Message


  • 4.  RE: Calibration - Data Sheet Template for Calibrating a Resistor

    Posted Fri February 28, 2025 07:38 AM

    John,

    Thanks for the reply. I had tried something similar to this before, but it required the users to enter an input and output on the data sheet which is different from their current process. I had looked at the function check as mentioned above, but that didn't allow the users to enter a value. Ultimately, I decided on an Asset Function of DISCRETE.

    In the Asset Function section:

    • Calibration Point = 1
    • Tolerance on Input = 1
    • Min Field Resolution = 3
    • Units = OHMS
    • Tolerance 1 set to Description of Failure, Single From -0.030 to 0.030 and Status when exceeded FAIL

    Finally, I added just one Calibration Point with a Set Point of 250.000 and left the Switch Action blank. This calculated the tolerance of 249.925 to 250.075.

    At first, I had ruled out the DISCRETE Asset Function Type because I saw the switch action and didn't think it fit well with this use case. But now I can see that it fits well for a case when you are taking one data point and the calibration either passes or fails on that point and you want to record the data.

    Thanks for the help.



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    Wesley Ellis
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    Original Message