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Watlow Series 935A User’s Manual
The Series 935A Operations Menu is the first menu you encounter when you press the
.
and
,
keys simultaneously for three
seconds. The Operations Menu provides a location to initiate the following actions or complete the following tasks:
•
Auto-tune
[`Aut]
: Start or stop the auto-tuning process. Auto-tuning selects a set of viable proportional, integral, and derivative
values for heat and/or cool output.
•
Alarm Points,
[`ALO]
and
[`AhI]
: Select the values for the high alarm point and the low alarm point. Alarm points, dependent
on sensor type high and low ranges, reside in the Operations Menu for easy access.
•
Timer Countdown Time
[tMr]
: Select a countdown time value between 00:00 and 99:59 hours:minutes or minutes:seconds.
Time interval choices
[thM]
and
[tMS]
reside in the Configuration Menu for Output 2.
•
Idle Set Point
[IDLE]
:
[trAc]
or an adjustable value between
[``rL]
and
[``rh]
. Choose to have the Idle Set Point track
[trAc]
, or equal, the Primary Set Point; or select an Idle Set Point value in °F or °C between the range low
[``rL]
and range
high
[``rh]
values. The Idle Set Point is active both before and after the timing sequence. The normal or Primary Set Point con-
trols during the timing sequence.
•
Local/Remote Set Point
[`L-r]
,
[```L]
or
[```r]
: Choose to maintain control with the Primary
[```L]
(local) Set Point, or to
enable the Remote
[```r]
Set Point if the Output 1
[`Ot1]
choice equals Remote Set Point
[`rSP]
.
•
Go to the PID Menu
[`Pid]
: Choose
[`YES]
to proceed to the PID Menu.
•
Go to the Configuration Menu
[CnFg]
: Choose
[`YES]
to proceed to the Configuration Menu.
The table on the next page presents this information in graphic form.
NOTE: Not every prompt listed here or on p. 11 in the Operations Menu will appear in your unit. Prompts vary with
lockout function and output set-up. Whether or not prompts appear in the Operations Menu depends on two features of
the Series 935A:
•
Lockout function; the Lockout Tag
[`tAg]
function masks prompts from view in the various menus. (If you cannot see a prompt,
you can make no change.) See Using Lockout Functions, p. 18, for more information.
•
Output 1 and 2 Configuration; some outputs are mutually exclusive. For example, if Output 1 is Alarm, then Output 2 cannot be
Timer. Therefore, the Operations menu will have no timer-related prompts. See the Valid Output Functions Table, p. 3, or Setting
Up Inputs and Outputs, p. 20.
Learn the Operations Menu
