Lakeshore 340 - 4.4 KEYPAD NAVIGATION

Lake Shore Model 340 Temperature Controller User’s Manual
Front Panel Operation 4-3
Keypad Description (Continued)
Aside from the key location, the color of the panel behind the key is also important. Direct settings, made with
the normal display showing, are initiated using keys with a gray background. The number keys and the gray
backed Enter, Escape, up (s), or down (t) keys are used to complete these operations when needed.
The keys with a white background initiate a setting screen. One or more associated parameters are grouped
on the setting screen. The white backed Next Setting, Previous Setting, Save Screen, Cancel Screen, and
More keys are used to move around within setting screens. Once the desired parameter is highlighted, it can
be set with the number entry keys. Examples are given below in keypad navigation.
4.4 KEYPAD NAVIGATION
This section gives specifics on how to set desired parameters. Number entry and setting selection are
discussed first because these operations are needed for both direct settings and setting screens.
4.4.1 Changing Parameters
After highlighting the desired parameter, use the middle group of keys to enter a new value into the
highlighted field. Press Enter to end data entry and accept the new value. Press Escape to end data entry
and restore the old value. Press Help to view limits and resolution for most parameters.
NOTE: Within setting screens, press Save Screen to accept the entire screen. Press Cancel Screen
or let the keypad time-out to return the screen parameters to pre-setting values.
Use the s or t key to toggle an On/Off or Yes/No toggle or select from a list of possible parameter settings.
Enter accepts the new setting and Escape restores the old setting.
4.4.2 Direct Settings
To save the operator time, the most commonly used
parameters can be set directly from the normal
display screen. These keys are located in the area
of the front panel with a gray background.
Some direct functions happen immediately when
the key is pressed. These include the Heater Off,
Loop 1, Loop 2, Alarm Reset, Math Reset, and
Local keys. No other keys are required to complete
these operations.
Pressing other keys with a gray background will
highlight the parameter indicated on the key. The
parameter can then be set by entering a number or
selecting a setting. P, I, D, Manual Output and
Setpoint values are entered as numbers. Heater
Range and Control Channel are set with s or t key
from a list of settings. Then press the Enter key to
accept or Escape key to cancel.
+1. 0 0 3 3 8
86.084
V
K
A
A
+0 .99956
88.020
V
K
B
B
Loop 1 Channel A
Setp +0.00000 V
Heat Disabled
P 0.0
I 0.0 MOut
D 0.0 100.00%
Normal Display with Control Channel Highlighted
+1. 0 0 3 3 8
86.084
V
K
A
A
+0 .99956
88.020
V
K
B
B
Loop 1 Channel A
Setp +0.00000 V
Heat Disabled
P 0.0
I 0.0 MOut
D 0.0 100.00%
Normal Display with Temperature Setpoint Highlighted