Time step size control

Hello everyone, 

I am trying to run my explicit Ls Dyna model by defining a time step size that would be constant throughout the simulation. So far I have only managed to control the time stepping using the DT2MS parameter in the *CONTROL_TIMESTEP card but it comes with mass scaling. Is there any way to assign an arbitrary fixed time step size throughout the termination time without invoking mass scaling in Ls Dyna? I would highly appreciate any suggestions and insight in this regard.

Thanks,

Shahriar.