76
Sentinel
™
Data Loggers
Sentinel
™
Data Loggers
77
APPENDIX B
GLOSSARY
Some general terminology associated with the data collection process is
listed here for convenience.
Bps:
Bits Per Second, a unit of signal transfer speed equal to the
number of elements per second. The Sentinel
™
Data Logger transfers
data at the rate of 115200 bps.
Bi-Polar Inputs:
the ability to accept both + and - inputs.
Button:
an actual key on the logger or computer keyboard or a soft key
in the program on the computer screen.
CMRR:
Common Mode Rejection Ratio; the ability to measure only the
difference between the input leads, rejecting what the leads have in
common.
Cursor:
a pointer or cross-hair that indicates the active position on the
computer screen. It is usually moved around with the mouse or arrow
keys.
Data logger:
a device used to sample and store electrical signals
representative of physical phenomena such as temperature, pressure
and flow, for long periods of time in an unattended environment.
Download:
the process of transferring data from the logger to the
computer.
EEPROM:
a storage device that can be electrically written to, erased and
reused. Data logger uses an EEPROM to store recorded data.
Hz:
hertz, a unit of measure of frequency equivalent to cycles per
second.
I/O:
input/output, a device or port capable of sending or receiving digital
information.
Pointer:
see cursor
Port:
a name given to any connector allowing input or output of
information.
