44
c
HAPTER
4:
Operation
Model 335 Temperature Controller
D
Alpha-Numeric Entry:
allows you to enter character data using the number pad
keys, and the
and
keys. The input sensor name is an example of a parameter
that requires Alpha-Numeric Entry. To edit an Alpha-Numeric parameter, press
or
. Once in edit mode, press
or
to cycle through the upper and lower
case English alphabet, numerals 0 through 9, and a small selection of common
symbols. Press
Enter
to advance the cursor to the next position, or save the string
and return from Alpha-Numeric Entry mode if it is in the last position.
Press
Escape
to move the cursor back one position, or to cancel all changes and
move on from the next menu parameter if the cursor is at the first position. Press
any of the number pad keys, except for
+/-
, to enter that character into the string
and advance the cursor to the next position automatically, or to save the string
and return to Menu Navigation mode if the cursor is in the last position. The
+/-
key can be used to enter the whitespace character.
D
Setting selection:
allows you to select from a list of values. During a selection
sequence, use
or
to cycle through the parameter values. To select the dis-
played parameter as the new setting, press
Enter
. Once
Enter
is pressed, the set-
ting is saved and the next menu parameter is displayed. Pressing
Escape
at any
time before pressing
Enter
will cancel any changes and exit the menu.
4.3 Display Setup
The intuitive front panel layout and keypad logic, the bright, vacuum flourescent dis-
play, and the LED indicators enhance the user friendly front panel interface of the
Model 335, which simultaneously displays up to four readings.
4.3.1 Display Modes
The Model 335 provides four display modes designed to accommodate different
instrument configurations and user preferences. The display modes are listed here,
and further information is provided for each display in section 4.3.1.1 to section
4.3.1.4.
D
The Two Input One Loop display mode provides both sensor readings, as well as
control loop information for one control loop.
D
The Two Loop display mode provides the sensor reading and control setpoint for
both control loops.
D
The Input display mode provides detailed information about the relevant sensor
input, and the associated output.
D
The Custom display mode provides a means for you to assign different types of
information to specific sections of the display.
Menu Navigation:
Display Setup
Q
Display Mode
Q
(Two Input Loop A, Two Input Loop B, Two Loop,
Custom, Input A, Input A Max/Min, Input B, Input B Max/Min)
Default: Custom
Interface Command:
DISPLAY
4.3.1.1 Two Input, One Loop Modes
The Two Input One Loop display mode provides a preconfigured display that contains
the most relevant information for the common configuration of one control loop and
one secondary sensor. In this mode, both sensor readings are displayed on the top
line, in units matching the Preferred Units setting for each.
Depending on which loop you need to monitor, you will either select Two Input Loop
A, or Two Input Loop B display mode. For the loop you monitor, that sensor reading
will appear in the top left display quadrant, and the other sensor reading will appear
in the right display quadrant. The output number, control setpoint, heater output
percentage, and heater range information for the control loop associated with the
monitored input are displayed in the bottom line. FIGURE 4-3 illustrates these two
displays.
