- Data Logging
- Collecting and gathering data over a period of time; using sensors.
- Sensors are used to take readings and measurements of their environment regularly. There are many different types of sensors which have specific purposes. They are either analogue or digital.
- Analogue readings go to a digital converter (ADC) which converts the signal into digital data.
- When sensors take a reading, the data is sent through a wireless link to the data logger. This then stores the data, sending it to a computer which analyses and processes it.
- Logging intervals - the period of time over which readings are taken. If measured values change quickly then intervals need to change as well.
- Advantages: can be used in remote situations. Can be carried out 24/7. No need to have a person present. More accurate due to less human error.
- Cons: If the system breaks down, the data could be lost. Equipment can be expensive. Readings will only be taken at the interval - readings inbetween will not be taken. Sensors must be callibrated.