Lake Shore Model 332 Temperature Controller User’s Manual
Specifications (Continued)
Control
Control Loops: 2
Control Type: Closed Loop Digital PID with Manual Heater Power Output, or Open Loop
Tuning: AutoTune (one loop at a time), Manual PID, Zones
Control Stability: Sensor dependent, refer to performance chart
PID Control Settings:
Proportional (Gain): 0
– 1000 with 0.1 setting resolution
Integral (Reset): 1
– 1000 (1000/s) with 0.1 setting resolution
Derivative (Rate): 1
– 200% with 1% resolution
Manual Heater Power: 0
– 100% with 0.001% setting resolution
Zone Control: 10 temperature zones with P, I, D, Manual Heater Power Output, and Heater Range
Setpoint Ramping: 0.1 to 100 K/min
Protection: Curve Temperature limits, Power up heater off, Short-circuit protection
Loop 1 Loop 2
Heater Output Type Variable DC current source Variable DC voltage source
Heater Output D/A Resolution 18 bit 16 bit
Max Heater Power 50 W 10 W
Max Heater Output Current 1 A 1 A
Heater Output Compliance 50 V 10 V
Heater Source Impedance N/A
0.1 Ω maximum
Heater Output Ranges 3 decade steps in power 1
Heater Load Type Resistive Resistive
Heater Load Range
10 Ω to 100 Ω recommended 10 Ω minimum
Heater Load for Max Power
50 Ω 10 Ω
Heater Noise (<1 kHz.) RMS
50 µV +0.017% of output voltage
<0.3 mV
Isolation
Optical isolation between output and
other circuits
None
Heater Connector Dual banana Detachable terminal block
Loop 1 Full Scale Heater Power at Typical Resistance
Heater Resistance Heater Range Heater Power
10 Ω
Low
Med
High
100 mW
1 W
10 W
25 Ω
Low
Med
High
250 mW
2.5 W
25 W
50 Ω
Low
Med
High
500 mW
5 W
50 W
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
Display Source: Temperature, sensor units, max, min, and linear equation
Display Update Rate: All readings twice per second
Temperature Display Resolution: 0.001° between 0°
– 99.999°, 0.01° between 100° – 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 or graphical display in percent of full scale for power or current
Heater Output Resolution: 1% numeric or 2% graphical
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
Introduction 1-9
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