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Tools for Metrology  - Calibration and Metrology Analysis
    MetroVal program
MetroVal version 4.7.7,  3.6 Mb zipped
MetroVal is an  easy automatic or manual calibration program and metrology analysis tool. For uncertainty, prediction and interval analysis it uses extended functionality of the Evaluator and Predictor programs as integrated modules. For more information, check the attached pdf presentation.

MetroVal is used by Metrology labs to calibrate or prepare uncertainty budgets and calibration procedures from one central point. The Calibration procedure looks like a simple table. It can be edited manually or generated automatically  and linked to the associated uncertainty budget tables. This approach enables non-programmers to prepare calibration procedures and review them in a glance. 

For automated calibrations a subroutine sequencer is used. For automated calibration VISA drivers should be installed. If VISA is not installed, only manual calibrations are  possible. Newton Metrology Ltd is not licensing or distributing VISA. Contact companies such as Agilent Technologies to obtain VISA drivers. VISA allows for calibrations using IEEE488, USB, LAN and RS232 communications with instruments.

The procedure table is read  line by line and tells the program which modules to run, which data to use, which methods to use to compute the uncertainties and how to generate the calibration report.  Also, it runs segments of the command sequencer as subroutines. A calibration template is generated that facilitates overview of the measured data. 

The uncertainty module can estimate measurement uncertainties per ISO GUM or by Monte-Carlo simulation directly from the measurement equation. The Prediction module can estimate present values and uncertainties of measurement standards from their past calibrations. 

Being linked to past calibrations data, the program can estimate and use drifts (over time or over number of uses) as uncertainty components in the uncertainty budgets. This has the advantage of having the measurement standards uncertainties and deviations updated and used in real time.

The calibration points and uncertainties can be complex numbers.

A simple result report editor is used to generate result table that complies with accreditation requirements. The certificate cover page is not generated since it is usually prepared by specific accreditation requirements using a word processor.

Like all Newton Metrology programs, MetroVal Complies with ISO/IEC 17025, the GUM (with supplements 1 and 2) and ILAC G8  document for compliance with specifications. Predictions comply with ILAC G24 / OIML D 10. PFA can also be computed with an ON or OFF directives in the calibration procedure per Z540.3.

MetroVal can run using information in an INI file and structured text file. It is possible to run MetroVal from another program using the INI file name as parameter. Check the free program MetroVal Command Line.

MetroVal can provide services using COM. Download the free program MetroVal COM tester and see the help and the examples.

For more info please download the pdf presentation and get hands on experience free for 30 days.

Above is an example of calibration procedure. The procedure includes subroutines (prefixed by &) which execute by the sequencer (in the control menu). The user may define in the Filter menu which points to calibrate in a specific calibration. 
 

Calibration and configuration instructions can be textual or graphical as shown below (the graphic show the MetroVal block diagram)


 

When manual readings are required, measured data input allows for easy entry of correlated measurements. When linked to VISA sequencer, the program enters data automatically into the required fields.

Note: You must purchase the activation code to be able to save your work and use several other functions. You will also receive an administrator code to define group passwords.


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