Chromalox 1020 User Manual

70
18 Glossary
This Glossary explains the technical terms and parameters used in this manual. The entry type is also shown:
Actual Setpoint
Actual Setpoint is the current effective value of the
Setpoint. This will be different to the target value of the
setpoint if it is currently ramping. The actual setpoint
s rises or falls at the ramp-rate set, until it reaches the
target Setpoint value.
Also refer to Active Setpoint, Setpoint, Setpoint Ramp
Enable and Setpoint Select
Alarm Hysteresis
An adjustable band on the “safe” side of an alarm
point, through which the process variable must pass
before the alarm will change state, as shown in the dia-
gram below.
Also refer to Alarm Operation
PV HIGH
ALARM
PV LOW
ALARM
BAND ALARM
DEVIATION
HIGH ALARM
Inactive
Inactive
Inactive
Alarm Inactive Alarm Inactive
Alarm Active
Active
Active
A
c
tiv
e
Inactive
A
c
tiv
e
A
c
tiv
e
Alarm Value
Alarm Value
Alarm Value
Setpoint
Process Variable
Process Variable
Process Variable
Process Variable
Process Variable
Alarm Hysteresis
Value
Setpoint
Setpoint
Alarm Value
Alarm Value
Alarm Value
DEVIATION
LOW ALARM
Alarm Hysteresis
Value
Alarm Hysteresis
Value
Alarm Hysteresis
Value
Alarm Hysteresis
Value
Alarm Hysteresis
Value
Inactive
Inactive
Inactive
Inactive
Inactive
Alarm Operation
The different alarm types are shown below, together
with the action of any outputs.
Also refer to Alarm Hysteresis, Alarm Inhibit, Band
Alarm, Deviation Alarm, Latching Relay, Logical Alarm
Combinations, Loop Alarm, Process High Alarm and
Process Low Alarm

Chromalox 1020 Specifications

General

Brand	Chromalox
Model	1020
Category	Temperature Controller
Language	English