Lake Shore Model 340 Temperature Controller User’s Manual
4-4
Front Panel Operation
4.4.3 Using Setting Screens
Use setting screens to change less used parameters. Press keys with a white background to display the
parameter setting screen associated with that key. The setting screen title displays on the center of the top
line.
On screens that contain parameters associated with sensor inputs or control loops, the top left corner will
show the sensor input or control loop. This field must be set correctly before proceeding. Use the
s
or
t
key
to select the appropriate sensor input or control loop and then press enter. The correct parameters will then
be shown on the setting screen.
The
Next Setting
and
Previous Setting
keys are
used to move around within the setting screen.
Once a parameter has been chosen and it is
highlighted, the data entry discussed above should
be used to make changes. The
Next Setting
and
Previous Setting
keys will act like the
Enter
key
and end the setting operation.
After making changes to a screen, press
Save
Screen
to store the changes into the Model 340.
Press
Cancel Screen
or let the keypad time-out to
return screen parameters to pre-setting values.
A
<more>
annunciator may appear in the right
corner of the screen to indicate that the parameters
would not fit on one screen. Other parameters will
be shown if the
More
key is pressed. If the
More
key is pressed after changes are made to a screen,
a message prompts users to save or ignore the settings.
4.4.4 Data Entry Screens
Data entry screens are similar to setting screens, but
they have data tables that are too long to fit on a
screen. Scroll up and down the data table instead of
using the
More
key to change screens. In the
following example of entering a temperature
response curve, curve identification information is
entered like a setting screen then the curve data is
entered in a long table.
4.4.5 The
Help
Key
The
Help
key at the lower right corner of the keypad can be pressed while selecting a parameter. The
information shown on the display will tell the operator the intended use of the parameter, then if the
More
key
is pressed, the setting limits and resolution of the parameter. Next the help will show how to use the
navigation keys discussed above as a reminder. Pressing
Cancel Screen
or the
Help
key will return the
instrument to its setting operation. Pressing Help from the normal display shows how to use the navigation
keys.
4.4.6 Keypad
Time-out
The Model 340 suspends some of its operation during keypad operation. (The control loop and computer
interfaces are never disabled.) A time-out was put in the keypad so that the instrument would return to normal
operation if a key happened to be unintentionally pressed. The time-out acts like an
Escape
or
Cancel
Screen
key being pressed so that no accidental changes are made to settings. Even with the time-out, we do
not recommend you do long data entry operations while the instrument controls an experiment.
S e n s o r U n it:
T e m p C o e f f :
E x c ita tio n :
R a n g e :
V
N e g .
10 u A
§ 2 .5 V
C u r v e :
S N :
1 D T -4 7 0
S ta n d a r d
In p u t: A
IN P U T S E T U P
T y p e : S ilic o n D io d e
Entering a New Sensor Type for Input A
D is p 1:
D is p 3 :
D is p 2 :
D is p 4 :
A
S E N S O R
A
T E M P K
A
S E N S O R
A
T E M P K
<m o r e >
R E A D IN G D IS P L A Y F O R M A T
In p u t D is p la y s :
Example screen showing <more>
N a m e :
S N :
L im it:
F o r m a t:
C o e f f :
1:
2 :
3 :
4 :
5 :
D T -4 7 0
S ta n d a r d
4 9 9 .9 0 0
V / K
N e g .
(I) In s e r t
(D ) D e le te
S e n s o r
T e m p (K )
0 .0 9 0 6 2 4 7 5 .0 0 0
0 .10 19 1
4 7 0 .0 0 0
0 .113 5 6
4 6 5 .0 0 0
0 .12 5 4 7
4 6 0 .0 0 0
0 .13 7 5 9
4 5 5 .0 0 0
E d it C u r v e : # 1
Entering a Temperature Response Curve