Watlow ANAWIN 2 - Manual (Page 145)

Glossary
AnaWin User’s Guide Glossary-5
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 off-
set, or droop, between setpoint and actual process
temperature.
See Auto-reset.
J
Job
A set of operating conditions for a process that
can be stored and recalled in a controller’s mem-
ory. also called a Recipe.
Junction
The point where two dissimilar metal conductors
join to forma 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.
Liquid Crystal Display (LCD)
A type of digital display made of a material that
changes reflectance or transmittance when an
electrical field is applied to it.
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 pro-
cess, 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 variable. It can be used as
either an alarm or control function.
Low Process Alarm
A signal that is tied to a set minimum value that
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 per-
centage 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.
N
No Key Reset
A method for resetting the controller's memory
(for instance, after an EPROM change).
Noise
Unwanted electrical signals that usually produce
signal interference in sensors and sensor circuits.
See Electromagnetic Interference.