Data Logging 02
See if you can get full marks in this ICT quiz.

Data Logging 02

See how much you know about data logging in this enjoyable KS3 ICT quiz. A data logger is an electronic device that records data over time or in relation to location either with a built in instrument or sensor, or via external instruments and sensors. The time between the moments that the data logger records the data it is collecting is called the logging interval. The logging interval varies and depends on what data you want to collect and the purpose for which it is collected. An example of this would be measuring the temperature changes in an environment over the course of a day. Taking readings every second would result in a lot of data. Taking readings once every hour would not give a smooth curve. Also, if one reading was somehow inaccurate, it would have a greater effect on the results. Taking a reading every ten minutes would therefore be more suitable.

Data logging has several important advantages.

If the logging period is long, a datalogger will not lose concentration, unlike a person. It will reliably take a reading at the exact moment it is supposed to, a person may be a little in advance or late. When the logging interval is very short, e.g. one tenth of a second, it would be impossible for a person to note the results. With a data logger, that is not a problem.

Data logging takes place over a length of time called a .......
logging interval
logging period
logging slot
time slot
A data logger has a built-in timer
The logging period should be ....... to collect enough data.
a time determined by what is being monitored
no more than five seconds
very long to collect all possible data
very short to get as much data as possible
The time period has to be appropriate for the situation
The time gap between measurements is called the .......
data period
logging interval
measurement period
time interval
Also called the sampling interval
The logging interval of a clinical thermometer might be .......
one day
one hour
one month
one year
It depends upon what is sensible in the circumstances, but checking a person's temperature every hour should be good enough to check if they are getting better or worse
The logging interval of a car braking system might be .......
0.01 seconds
1 second
1 minute
10 minutes
Car brakes are usually applied for just a few seconds
Data logging is useful in locations .......
where it is extremely cold
on the sea floor
in a desert
All of the above
In other words, where it is difficult for people to work or live
Data logging is useful because .......
it can take place without people being present
it is reliable and does not break down
it requires a means of storing data
it uses sensors to measure the environment
Automatic data loggers mean people can do other jobs while the data is being collected
Automatic data loggers are more accurate than people .......
when recording data where the logging interval is short
when recording data where the logging interval is long
when the logging period is very long
None of these
When the logging interval is less than a few seconds, it can be quite hard or even impossible for people to record data accurately
Which is not an advantage of data logging?
Data can be collected at very short intervals
Data can be collected over very long time periods
Data is recorded accurately
Data loggers must always be connected to a computer
Data loggers only need to be connected to a computer when someone wants to process the data
Which is the best description of data logging?
Collection and storing of bytes
Collection and storing of data
Collection and storing of information
Collection and storing of logs
A data logger does not usually process the data, that is normally done by software on a computer
You can find more about this topic by visiting BBC Bitesize - Data and databases

Author:  Duncan Daish

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