CLS200 Series User’s Guide
175
I
Infrared (IR)
A region of the electromagnetic spectrum
with wavelengths ranging from one to 1,000
microns. These wavelengths are suited for
radiant heating and infrared (noncontact)
temperature sensing.
Input
Process variable information that is supplied to
the instrument.
Input Scaling
The ability to scale input readings (readings in
percent of full scale) to the engineering units of
the process variable.
Input Type
The signal type that is connected to an input,
such as thermocouple, RTD, linear or process.
Integral Control (I)
Control action that automatically eliminates
offset, or droop, between setpoint and actual
process temperature.
J
Job
A set of operating conditions for a process
that can be stored and recalled in a controller’s
memory. Also called a recipe.
Junction
The point where two dissimilar metal
conductors join to form a thermocouple.
L
Lag
The delay between the output of a signal and
the response of the instrument to which the
signal is sent.
Linear Input
A process input that represents a straight line
function.
Linearity
The deviation in response from an expected or
theoretical straight line value for instruments and
transducers, also called linearity error.
Load
The electrical demand of a process, expressed
in power (watts), current (amps) or resistance
(ohms). The item or substance that is to be
heated or cooled.
Loop Alarm
Any alarm system that includes high and low
process, deviation band, deadband, digital
outputs, and auxiliary control outputs.
Low Deviation Alarm
Warns that the process is below the setpoint,
but above the low process alarm setpoint. It can
be used as either an alarm or control function.
Low Process Alarm
Indicates that a process value has dropped
below the low process alarm setpoint. It can be
used as either an alarm or control function.
Low Reading
An input level corresponding to the low process
value. For linear inputs, the low reading is a
percentage of the full scale input range. For
pulse inputs, the low reading is expressed in
cycles per second (Hz).
M
Manual Mode
A selectable mode that has no automatic
control aspects. The operator sets output levels.
Manual Reset
See Reset.
Milliampere (mA)
One thousandth of an ampere.
MMI
Man-machine interface.
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