Watlow Series 998 - Manual (Page 27)

Upper Display
Indicates either actual process
value for channel A or channel
B, the operating prompt values,
or error codes. When powering
up, the display will be blank for
3 seconds. Red or green, 0.4”
(10mm) high, seven-segment,
four-digit LED display.
CH A Indicator Light
When lit, if the CH B light is not
on, the channel A process value
is shown in the upper display
and the channel A set point
value is shown in the lower dis-
play. When both CH A and CH
B lights are on, the upper dis-
play shows the channel A
process value and the lower dis-
plays shows the channel B
process value.
CH B Indicator Light
When lit, if the CH A light is not
on, the channel B process value
is shown in the upper display
and the channel B set point
value is shown in the lower dis-
play. When both CH A and CH
B lights are on, the upper dis-
play shows the channel A
process value and the lower dis-
play shows the channel B
process value.
Up-arrow Key >
Increases the value of the displayed prompt. A
light touch increases the value by one. Holding the
key down increases the value at a rapid rate. New
data does not take effect for five seconds or until
the Mode µ or Display ∂ key is pressed.
Down-arrow Key <
Decreases the value of the displayed prompt. A
light touch decreases the value by one. Holding the
key down decreases the displayed value at a rapid
rate. New data does not take effect for five seconds
or until the Mode µ or Display ∂ key is
pressed.
Up-arrow + Down-arrow Keys
Press simultaneously for three seconds to enter
the Setup Menu. Continue to press both keys for
another three seconds to enter the Factory Menu.
WATLOW Series 998 User’s Manual 3.1 Keys and Displays, Chapter 3
Figure 3.1 -
Series 998 Keys and
Displays.
Lower Display
Indicates the channel A or
channel B set point, or channel
B process value, menu
prompts, or alarm codes. Red
or green, 0.3” (8mm) high,
seven-segment, four-digit LED
display.
1A, 2A, 1B, 2B Indicator
Lights
These lights indicate when out-
put 1A, 2A, 1B or 2B is active.
Display Key ∂
The Display key is used to
select which channel A and/or
B parameter to displayed. On
initial power-up the upper dis-
play shows the channel A
process value and the lower
display shows the channel A set
point value and the CH A light
is on. One press of the Display
key lights CH B and the upper
display shows the channel B
process value and the lower
display shows the channel B
set point value. A second press
of the key lights both CH A and
CH B, and the upper display
shows the channel A process
value and the lower display
shows the channel B process
value. See the next page for
more information on the Display Loop.
Auto/Man Key å
Used to switch from auto to manual control or vice
versa. Also used to reset alarms.
Mode Key µ
Steps the control through the menus. New data is
entered once the Mode key is pressed.
Mode+Up-arrow Key µ + >
To move backwards through the menus, hold
down the Mode key, then press the Up-arrow key
to scroll. The Mode key must be pressed first and
held before the Up-arrow key will begin scrolling.
Scrolling is disabled once the keys are released or
you reach the top of the menu.
Chapter 3 Keys and Displays
TL W WA
PROCESS
1A 2A 1B 2B
CH A
CH B
DISPLAY
SERIES 998
MODE
AUTO
MAN