Watlow CAS200 - Manual (Page 120)

Glossary CAS200 User’s Guide
108 Watlow Anafaze
Frequency
The number of cycles over a specified period of
time, usually measured in cycles per second.
Also referred to as Hertz (Hz). The reciprocal is
called the period.
G
Gain
The amount of amplification used in an electri-
cal circuit. Gain can also refer to the Propor-
tional (P) mode of PID.
Global Alarm
Alarm associated with a global digital output
that is cleared directly from a controller or
through a user interface.
Global Digital Outputs
A pre-selected digital output for each specific
alarm that alerts the operator to shut down
critical processes when an alarm condition
occurs.
Ground
An electrical line with the same electrical
potential as the surrounding earth. Electrical
systems are usually grounded to protect people
and equipment from shocks due to malfunc-
tions. Also referred to a "safety ground".
H
Hertz(Hz)
Frequency, measured in cycles per second.
High Deviation Alarm
Warns that the process is above setpoint, but
below the high process variable. It can be used
as either an alarm or control function.
High Power
(As defined by ANAFAZE) Any voltage above
24Vac or Vdc and any current level above
50mAac or mAdc.
High Process Alarm
A signal that is tied to a set maximum value
that can be used as either an alarm or control
function.
High Process Variable (PV)
See Process Variable (PV).
High Reading
An input level that corresponds to the high
process value. For linear inputs, the high read-
ing is a percentage of the full scale input
range. For pulse inputs, the high reading is
expressed in cycles per second (Hz).
I
Infrared
A region of the electromagnetic spectrum with
wavelengths ranging from one to 1,000
microns. These wavelengths are most 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.
See Auto-reset.
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 conduc-
tors 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.