Lake Shore Model 642 Electromagnet Power Supply User’s Manual
Introduction
1-7
Accessories included
MAN-642
Model 642 user manual
6031 Two
front
handles
6032 Two
rear
handles
6051
Terminal block, 4 pin
6052
Terminal block, 8 pin
6252
15-pin D-sub mating connector, analog I/O
108-654
Strain relief bushing kit
-----
Calibration
certificate
Accessories available
6201
1 m (3.3 ft) long IEEE-488 (GPIB) computer interface cable
6261
3 m (10 ft) magnet cable kit, AWG 4
6262
6 m (20 ft) magnet cable kit, AWG 4
CAL-642-CERT
Instrument recalibration with certificate
CAL-642-DATA Instrument
recalibration with certificate and data
1.3 SAFETY
SUMMARY
Observe these 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 assumes no liability for Customer failure to comply with these requirements.
The Model 642 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.
• Over voltage category II.
• Pollution degree 2.
• 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.
Power and Ground Connections
This instrument must be connected to a dedicated three-phase power circuit with proper size of circuit breaker. (Refer
to Chapter 3 – Installation) Verify that the unit has been configured for the correct input voltage. The neutral line, if
available, is not used. The unit may be hard-wired or connected with a flexible cable and plug. In all cases the correct
size wire must be chosen for the current drawn and the length of cable used. To minimize shock hazard, the electrical
ground (safety ground) lead must be connected. If a flexible cable and plug are used, plug the power cable into an
approved electrical outlet. The power jack and mating plug of the power cable must meet Underwriters Laboratories
(UL) and International Electromechanical Commission (IEC) safety standards. Power wiring must comply with
electrical codes of the locality in which the unit is installed.
Ventilation
The instrument has ventilation holes in its side panels. Do not block these holes when the instrument is operating.
Provide at least 25 mm (1 in) of air space on each side for ventilation.
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. Refer component replacement and internal adjustments to
qualified maintenance personnel. Do not replace components with power cable connected. To avoid injuries, always
disconnect power and discharge circuits before touching them.