convergence of MD simulations

Dear CCL members:
  I read that in NVE simulations, the ratio of RMS fluctuations of the potential
 and kinetic energies is an indication
 of convergence of energy, with RMS(PE)/RMS(KE) = 0.01 indicating a satisfactory
 level of global energy stabilization.  Is there such a test for NTP simulations?
  Thanks in advance, Sue Heavner