Watlow Series 922 - Manual (Page 13)

13
How to Use Keys and Displays, Chapter 2 WATLOW Series 922 User's Manual
Keys / Displays
Actual and Alphanumeric Display Area
°
F LED
Indicates the value in
the ACTUAL display is
temperature in degrees
Fahrenheit.
When both
°
C and
°
F
LEDs are OFF, the
922 is displaying
Process Variable
Units (PVUs).
°
C LED
Indicates the value in
the ACTUAL display is
temperature in degrees
Celsius.
ACTUAL Display
Shows the actual value
of the process variable
for Channel 1 in
four digits.
Keyboard Area
DOWN Key
Acts opposite the UP
key. Decreases the
value in the alphanu-
meric display. A light
touch decreases the
value by one digit. Hold
the key down to de-
crease the displayed
value at a rapid rate.
UP Key
Increases the value in
the alphanumeric
display. A light touch
increases the value by
one digit. Hold the key
down to increase the
displayed value at a
rapid rate.
90
°
Front Panel Screw
Secures the control
chassis in its case with a
1/4 turn clockwise or
releases the chassis
with a 1/4 turn counter-
clockwise.
MODE Key
This key steps the
Series 922 in sequence
from prompt to prompt. RUN/HOLD Key
Executes or holds a
program from any
Main menu.
Run/Hold LEDs
When the HOLD LED is
ON steady, the 922 is in
a HOLD condition.
When the HOLD LED
flashes, the unit is in a
WAITFOR step or has
exceeded the guaran-
teed soak deviation..
When the RUN LED is
ON the 922 is in the
RUN condition.
When the RUN LED is
flashing, the program is
being held by the remote
hold input.
ENTER Key
Enters selected (flash-
ing) data into the micro-
processor memory. This
will clear an error code,
or latched alarm indica-
tions when the ACTUAL
display value returns to
within the alarm limit.
Figure 7 -
Keyboard Front
Panel Information
Alphanumeric Display
Shows entry prompts,
the parameter values in
alphanumerics and
Channel 2 ACTUAL
value.
Figure 6 -
Actual and Alphanu-
meric
Display
Front Panel
Information