I take it that your meter has a disc constant kH of 7.2 1 revolution of the disc equals 7.2 Watthours. (or 1 kWh = 138.89 revs) Turn off all appliances in the house so that the meter is not spinning. Switch on a known load e.g. 2000 Watt heater. in 1 hour the meter should advance 2 kWh. (it may be hard to determine an exact reading as USA meters have no decimal)
or a quicker way to do this is
With a 2 kW load the meter will do 277.78 revs per hour 1 hour equals 3600 seconds. 1 rev of the disc will be done in 12.96 seconds. Usually take 10 revs of the meter, time will be 129.6 seconds or 2 minutes 9.6 seconds. Ensure the load remains on and doesn't get switched off by the thermostat.
Sorry for the late response.
Many of my meters are turning around on the web.
Have a look on YouTube