Campbell Scientific CR200/CR200X-series Dataloggers - Manual (Page 176)

Appendix A. Glossary
Earth Ground
use of a grounding rod or another suitable device to tie a system or device
to the earth. Earth ground is a sink for electrical transients and possibly
damaging potentials, such as those produced by a nearby lightning strike.
Earth ground is the preferred reference potential for analog voltage
measurements. Note that most objects have a "an electrical potential" and
the potential at different places on the earth - even a few meters away - may
be different.
engineering units
Units that explicitly describe phenomena, as opposed to the CR200(X)
measurement units of millivolts or counts.
ESD
Electrostatic discharge
ESS
Environmental Sensor Station
excitation
Application of a precise voltage, usually to a resistive bridge circuit.
execution time
Time required to execute an instruction or group of instructions. If the
execution time of a Program Table exceeds the table's Execution Interval,
the Program Table is executed less frequently than programmed.
expression
A series of words, operators, or numbers that produce a value or result.
final storage
That portion of memory allocated for storing data tables with output arrays.
Final storage is a ring memory, with new data overwriting the oldest data.
garbage
The refuse of the data communication world. When data are sent or
received incorrectly (there are numerous reasons why this happens) a string
of invalid, meaningless characters (garbage) results. Two common causes
are: 1) a baud rate mismatch and 2) synchronous data being sent to an
asynchronous device and vice versa.
ground
Being or related to an electrical potential of 0 Volts.
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