Data logging systems


	Data logging systems
	Advantages Data collection can be automatic so no human presence is necessary Readings can be continually taken over long periods There is no chance of somebody forgetting to take a reading Readings will be more accurate if a computer takes them because there is no chance of human error Sensors can be placed in locations where it is dangerous for humans to go Readings can be taken very quickly [several readings every second from a number of different sensors]. Humans could not achieve this.	Disadvantages If there is a fault it may go unnoticed for a long time
	Evaluation

Data collection can be automatic so no human presence is necessary
Readings can be continually taken over long periods
There is no chance of somebody forgetting to take a reading
Readings will be more accurate if a computer takes them because there is no chance of human error
Sensors can be placed in locations where it is dangerous for humans to go
Readings can be taken very quickly [several readings every second from a number of different sensors]. Humans could not achieve this.

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