Lake Shore Model 331 Temperature Controller User’s Manual
Specifications (Continued)
General
Ambient temperature
15 °C to 35 °C at rated accuracy, 10 °C to 40 °C at reduced accuracy
Power requirement
100, 120, 220, 240 VAC, (+6%, -10%), 50 or 60 Hz, 120 VA
Size
216 mm W × 89 mm H × 368 mm D (8.5 in × 3.5 in × 14.5 in), half rack
Weight
4.8 kg (10.5 lb)
Approval CE
mark
Product Configuration
Part Number
Description (Input configuration cannot be changed in the field)
Standard Temperature Controllers, all features included:
331S
Two Diode/Resistor Inputs
331S-T1
One Diode/Resistor, One Thermocouple Input
331S-T2
Two Thermocouple Inputs
Economy Temperature Controllers, all features of the 331S except does not include the following:
IEEE-488, relays, analog voltage output, second control loop.
331E
Two Diode/Resistor Inputs
331E-T1
One Diode/Resistor, One Thermocouple Input
331E-T2
Two Thermocouple Inputs
Refer to Chapter 7 of this manual for a complete description of Model 331 options and accessories.
Specifications subject to change without notice.
1.3 SAFETY
SUMMARY
Observe these general safety precautions during all phases of instrument operation, service, and
repair. Failure to comply with these precautions or with specific warnings elsewhere in this manual
violates safety standards of design, manufacture, and intended instrument use. Lake Shore
Cryotronics, Inc. assumes no liability for Customer failure to comply with these requirements.
The Model 331 protects the operator and surrounding area from electric shock or burn, mechanical
hazards, excessive temperature, and spread of fire from the instrument. Environmental conditions
outside of the conditions below may pose a hazard to the operator and surrounding area.
• Indoor use.
• Altitude to 2000 meters.
• Temperature for safe operation: 5 °C to 40 °C.
• Maximum relative humidity: 80% for temperature up to 31 °C decreasing linearly to 50% at 40 °C.
• Power supply voltage fluctuations not to exceed ±10% of the nominal voltage.
• Overvoltage category II.
• Pollution degree 2.
Ground The Instrument
To minimize shock hazard, the instrument is equipped with a three-conductor AC power cable. Plug the
power cable into an approved three-contact electrical outlet or use a three-contact adapter with the
grounding wire (green) firmly connected to an electrical ground (safety ground) at the power outlet.
The power jack and mating plug of the power cable meet Underwriters Laboratories (UL) and
International Electrotechnical Commission (IEC) safety standards.
Introduction
1-9
