  Recently, the new strongly intensive measures of fluctuations $\Delta$ and
$\Sigma$ have been proposed. In this publication their properties are tested
using an example of event-by-event transverse momentum fluctuations. The
obtained values are compared to the long used $\Phi$ measure of pT
fluctuations. Several tests are preformed within data produced by fast
generators, as well as by the UrQMD model. The UrQMD calculations are presented
for the systems and energies which are planned to be studied in the NA61/SHINE
experiment at the CERN Super Proton Synchrotron.
