The range parameter

range=YYYYMMDDhhmmss[,YYYYMMDDhhmmss]

This parameter specifies the time interval for the requested performance data. Start and end times are specified as a string of the form YYYYMMDDhhmmss, provided in local time of the monitored system. If you omit the end time, the defined Monitor III gatherer interval (MINTIME) is used to determine the end time.

Example: 

RANGE=20090725100000,20090725110000

specifies the start time as 10:00 AM on 07/25/2009 and the end time as 11:00 AM on the same day.