Lake Shore Model 340 Temperature Controller User’s Manual
3-2
Installation
3.1.3 Safety
Summary
The following general safety precautions must be observed during all phases of operation, service, and repair
of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual
violates safety standards of design, manufacture, and intended use of the instrument. Lake Shore
Cryotronics, Inc. assumes no liability for Customer failure to comply with these requirements.
The Model 340 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.
• Temperature: 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.
Ground the Instrument
To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical ground.
The instrument is equipped with a three-conductor AC power cable. The power cable must either be plugged
into an approved three-contact electrical outlet or used with 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.
Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical
instrument in such an environment constitutes a definite safety hazard.
Keep Away from Live Circuits
Operating personnel must not remove instrument covers. Component replacement and internal adjustments
must be made by qualified maintenance personnel. Do not replace components with power cable connected.
To avoid injuries, always disconnect power and discharge circuits before touching them.
Do Not Substitute Parts or Modify Instrument
Because of the danger of introducing additional hazards, do not install substitute parts or perform any
unauthorized modification to the instrument. Return the instrument to an authorized Lake Shore
representative for service and repair to ensure that safety features are maintained.
3.1.4 Safety
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