Lake Shore Model 331 Temperature Controller User’s Manual
Specifications (Continued)
Front Panel
Display
2 line by 20 character, 9 mm character height, vacuum fluorescent
display
Number of reading displays
1 to 4
Display units
K, °C, V, mV,
Ω
Reading source
Temperature, sensor units, max, min, and linear equation
Display update rate
All readings twice per s
Temp display resolution
0.001° from 0° to 99.999°, 0.01° from 100° to 999.99°,
0.1° above 1000°
Sensor units display resolution Sensor dependent to 5 digits
Other displays
Setpoint, Heater Range, and Heater Output (user selected)
Setpoint setting resolution
Same as display resolution (actual resolution is sensor dependent)
Heater output display
Numeric display in percent of full scale for power or current
Heater output resolution
1%
Display annunciators
Control Input, Remote, Alarm, Tuning, Ramp, Max, Min, Linear
Keypad
20 full travel keys, numeric and specific functions
Front panel features
Front panel curve entry, display brightness control, keypad lock-out
Interface
IEEE-488 interface (331S)
Features
SH1, AH1, T5, L4, SR1, RL1, PP0, DC1, DT0, C0, E1
Reading rate
To 10 readings per s on each input
Software support
LabVIEW™ driver (consult factory for availability)
Serial interface
Electrical format
RS-232C
Max baud rate
9600 baud
Connector 9-pin
D-sub
Reading rate
To 10 readings/s on each input (at 9600 baud)
Special interface features
Model 330 command emulation mode
Alarms
Number
4, high and low for each input
Data source
Temperature, Sensor Units, Linear Equation
Settings
Source, High Setpoint, Low Setpoint, Deadband, Latching or Non-
Latching, Audible On/Off
Actuators
Display annunciator, beeper, relays
Relays (331S)
Number 2
Contacts
Normally Open (NO), Normally Closed (NC), and Common (C)
Contact rating
30 VDC at 5 A
Operation
Activate relays on high, low, or both alarms for either input or manual
Connector
Detachable terminal block
Analog voltage output (331S)
Scale User
selected
Update rate
10 readings per s
Data source
Temperature, Sensor Units, Linear Equation
Settings
Input, source, top of scale, bottom of scale, or manual
Range ±10
V
Resolution 0.3
mV
Accuracy ±2.5
mV
Min load resistance
100
Ω
(short circuit protected)
1-8
Introduction
