Watlow Series 920 Microprocessor-Based Ramping Control - Manual (Page 68)

CALIB:
C/F/U:
Closed loop:
CLR FILE:
Cold junction:
Cold junction
compensation:
Cold start:
COM:
COM ID:
CT C:
CT H:
Cycle time:
DAY:
DB:
Dead band: A temperature band between heating and cooling functions.
Derivative: Anticipatory action that senses the rate of change of tempera-
ture, and compensates to minimize overshoot and undershoot.
Also “rate.”
When ACCESS (0) is entered under the SETUP menu, the
CALIB parameters appear. These parameters setup the Real
Time and the calibration offset of the process variable.
Accepts the sensor input and scales it to degrees Celsius,
Fahrenheit, or Units of measure. This parameter will not appear
if DIP switch #7 is ON.
Control system with a sensing device for process variable
feedback.
Allows the operator to clear a file of the Series 920.
Point of connection between
electronic instrument.
thermocouple metals ands
the
Electronic means used to compensate for the effect of the
temperature at the cold junction.
A "Clean”, or completely cleared-of-user-program-information,
start-up condition. (Factory settings.)
This parameter determines whether the communications
protocol will be STX/ETX or XON/XOFF. This parameter can
be found in the SPCLFUNC menu. This parameter will not
appear if you do not have communications.
Represents the device identification number as required for the
ANSI X3.28 communications protocol for the Series 920. This
parameter will not appear if you do not have communications.
The Cooling Cycle Time expressed in seconds for a controller to
complete one ON/OFF cycle. The time between successive
turn ons. This parameter will not appear if: 1. OUT = HT, or
PB C = 0, 2. Your Series 920 has a 4-20mA output and OUT =
CL or CL/HT.
The Heating Cycle Time usually expressed in seconds for a
controller to complete one ON/OFF cycle. Time between
successive turn ons. This parameter will not appear if: 1. OUT
= CL, or PB H = 0, 2. Your Series 920 has a 4-20mA output
and OUT = HT or HT/CL.
The time necessary to complete a full ON-through-OFF period
in a time proportioning control system.
Represents the number of days that the 920 waits until AUTO-
START takes place. Each time 0O:OO is achieved, one day has
gone by.
The Dead Band parameter representing the area where no
heating or cooling takes place in a heat/cool proportional
control. This parameter will not appear if OUT = HT or CL.
68 WATLOW Series 920 User’s Manual