Purpose To design a versatile procedure for testing the repeatability and accuracy of geometric setup i.e. leaves motion, gantry and collimator position and isocenter stability, as well as dosimetric properties of beam parameters in conditions representative for intensity modulated radiation therapy (IMRT) techniques, with respect to ease for performance and automated analysis. Methods Tests were design for the cubic water-equivalent phantom with the insertion of MatriXX Evolution dosimetric device, consisted of 1024 air ionization chambers arranged in 2D array for dose distribution acquiring. Measurements were analyzed using OmniPro I’mRT software. All tests were checked for phantom setup reproducibility contribution in the final uncertainty of each result. The capability to detect in these tests the gross errors in gantry, collimator and treatment couch setup was checked. The influence of dosimetric device placement with respect to the beam central axis on reconstructed dose values and localization was also investigated, taking into account the limited resolution related to ionization chambers spacing. Results Stability of isocenter position performed for full-arc rotating gantry and 1×1 cm2 field size together with cone beam CT, analyzed against the convergence of MV to kV point of rotation showed accuracy of 0.2 mm whereas 0.5 mm is declared by the linac manufacturer. The test involving the re-loading of the field size for non-zero gantry position showed 0.5% accuracy of leaves positioning. Dose analysis for strip test was appeared to be sensitive to small couch angles often difficult to perceive, resulting in about 2% dose discrepancy for 2–5 deg. angles mismatch. Conclusions It is possible to verify the parameters of linac operation which are crucial for accurate and precise IMRT realization in a simple tests involving the equipment commonly used for dose distribution verification. The advantage of using 2D array of dosimeters is the possibility to compare two subsequent measurements in terms of gamma index, what enables to maintain the single linac operation stability aa well as twin parameters across the set of linacs. For IMRT QA purpose 3% and 1 mm criteria are sensitive enough to detect the mismatch in geometric or dosimetric parameters of linac of 0.2 mm and 1%, respectively.