The program was left running in the Time and Frequency section lab for the
duration between 2:37:53pm on August 7 2006 to 12:11:42pm on August 8 2006. The
following graphs were obtained:
This is the hourly report:
We find that the temperature was nearly constant at around 25 degrees.
The lights were switched out between 6:37pm to 7:37pm (office closing time)
Note: Temperature sensor 1 was not connected to the circuit. Only channels 2 and 3 were connected.
This is the per minute report between 1am and 9am:
It shows ripples in the temperature recorded. This is due to the switching on and off of the thermostat of the air-conditioning system. The cycle duration is approximately one hour and the temperature variation is around 1 degree.
The exact time of switching off the lights is seen from the light sensor graph shown per second:
The lights were switched off at 6:58:22pm on August 7, 2006.
The next day the lights were switched on at 9:23:54am.