Decagon Devices Em5b Manual page 10

2 ABOUT THE EM5B LOGGER Em5b
For most sensor types, the Em5b makes a measurement from each of
the 5 sensor ports every 60 seconds, regardless of the measurement
interval value. When the Em5b internal clock reaches the time to
store a reading, the average value of all the 60-second sensor readings
is stored.
For example, if you set the measurement interval to 60, the Em5b
stores an average of the past 60 sensor readings. If you choose an
interval of 1440, the Em5b stores one value that represents the aver-
age sensor value for the entire 24-hour period.
Configuring Sensors
The Em5b requires you to identify the type of sensor you plugged
into each sensor port. Identifying the sensor types correctly config-
ures the Em5b hardware for that sensor. If you choose not to have
a sensor plugged into one or more of the logger's ports, you can set
that ports sensor type to "None Selected."
Storing Data
The Em5b stores data for all five sensor ports for each measurement
interval. If no sensor is connected to one or more of the logger's
ports, the Em5b stores a "0" for that port. The Em5b data memory
is non-volatile flash. Removing the batteries or performing a system
reset does not erase your data.
Data Storage Size
The Em5b stores 3,348 data scans. When the logger has filled its
data memory, it begins overwriting the oldest data in the memory.
Measurement Span
Depending on the set measurement interval, the Em5b can read for
several weeks to several years before its memory has filled. You can
determine how many days of data your Em5b holds by dividing the
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