Lake Shore Model 331 Temperature Controller User’s Manual
4.1.4 Display
Definition
In normal operation, the 2 row by 20 character vacuum fluorescent display is divided into four user-
configurable areas that can provide temperature readings, setpoint display, and heater status. Other
information is displayed when using the various functions on the keypad. See Figure 4-2.
K = Kelvin
C = Celsius
Sensor (V, mV, or
Ω
)
Linear (/)
Min (<)
Max (>)
À 2 9 5 . 2 2½ Á 2 9 5 . 2 2½
 2 9 5 . 0 0½ 0 % O f f
Input A
Input B
None = No Display
0% Off = Heater Off
XX% Low = 0.5 W Heater Range
XX% Med = 5 W Heater Range
XX% High = 50 W Heater Range
Input A
Input B
Setpoint
None = No Display
Input A
Input B
Heater Out
None = No Display
Off L2 = Heater Off
XX% L2 = Heater On (1 W)
-or-
K = Kelvin
C = Celsius
Sensor (V, mV, or
Ω
)
Input A
Input B
None = No Display
Input
Reading
Source
(Same choices as
Display Location 1)
(Same choices as
Display Location 1)
(Same choices as
Display Location 1)
Setpoint Units and Heater Out Current or Power settings are
under the
Control Setup
key. All remaining selections in this
illustration are made under the
Display Format
key.
*
*
*
Display Location 3:
Source:
Units:
Display Location 1:
Source:
Display Location 2:
Source
Display Location 4:
Source:
Heater Output (Loop 1):
Heater Output (Loop 2):
C331-4-2.eps
Figure 4-2. Display Definition
4.2
TURNING POWER ON
After verifying line voltage (Paragraph 3.4), plug the instrument end of the line cord (included with the
connector kit) into the power and fuse assembly receptacle on the instrument rear. Plug the opposite
end of the line cord into a properly grounded, three-prong receptacle. Place the power switch, located
next to the line cord receptacle, to the On (
l
) position. The instrument initiates the following power up
sequence: the instrument alarm sounds once; the display shows the following startup message.
Lake Shore Model 331
Temp. Controller
The normal reading display appears. If the instrument does not complete the sequence or if a general
error message displays, there may be a problem with the line power or the instrument. Individual
messages in a reading location normally indicate that input setup is required.
4-4
Operation
