Kistler-Morse KM L-Cell Bolt-On - Manual (Page 73)

Appendix C. Glossary
C-1
Appendix C: Glossary
Calibration Curve
A graph of load versus output. Typically, it is a
straight line and relates live load to a voltage or
digital count output.
Hysteresis
The maximum difference between sensor read-
ings for the same applied load, with one reading
obtained by increasing the load from zero and the
other reading obtained by decreasing the load
from the rated load. It is usually expressed as a
percentage of the rated load.
Live Load
The weight of the material to be measured;
in other words, the weight of the contents of the
vessel.
Non-Linearity
The maximum deviation of the sensor calibration
curve from a straight line between zero load and
the rated load.
Repeatability
The maximum difference between sensor read-
ings for repeated loadings under identical
loading and environmental conditions.
Sensitivity
The ratio of the change in electrical output to the
change in load or stress.
Signal Processor
The electronic hardware and software box
connected to a sensor (such as an L-Cell) or
transducer array. If it is augmented with software,
the first stage of the signal processor is an A/D
converter. A signal processor generally has
provisions for most, if not all, of the following:
1. Excitation voltage applied to each of the
sensors/transducers in the network.
2. Adjustable zero calibration.
3. Adjustable scale factor.
4. Long-distance signal transmission options,
such as 4-20 mA or
serial transmission.
5. Setpoint (commonly referred to as a contact
closure) to provide a discrete indication that
a specific point has
been reached.
6. Some type of indicator or display, such as
numerals, needle movement, discrete LED
array, etc.