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
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