Lake Shore Model 102 User’s Manual
Introduction 1-1
CHAPTER 1
INTRODUCTION
1.0 GENERAL
Lake Shore Cryotronics designed and manufactured the Model 102
Current Source in the USA. This chapter covers a general description in
Paragraph 1.1, Handling Liquid Helium and Liquid Nitrogen in
Paragraph 1.2, Electrostatic Discharge in Paragraph 1.3, Safety
Summary in Paragraph 1.4, and Safety Symbols in Paragraph 1.5.
We welcome comments on this manual. Although we try to keep it error-free,
some may occur. To report an error, describe it briefly and include the
appropriate paragraph, figure, table, and page number. Send comments to
Lake Shore Cryotronics, Attn: Technical Publications, 575 McCorkle Blvd.,
Westerville, Ohio 43082-8888. This manual is subject to change without
notice.
1.1 MODEL 102 GENERAL DESCRIPTION
The Model 102 is a precision DC current source which provides excellent
performance at low cost. The factory pre-sets output current to 10 µA, but
the unit may be reprogrammed at any value between 1 µA and 1 mA by
changing a resistor inside the instrument.
The Model 102 has a compliance voltage of 8 Volts, allowing it to be used as
an excitation source in a variety of diode sensor applications. A compliance
LED visually indicates unit operation within specification.
The Model 102 provides a constant current through the load (sensor)
connected across the output terminals. It monitors the voltage across the
sensor and derives a corresponding temperature from the response curve
supplied with the sensor.
An external AC wall-mount transformer supplies power to the unit. There
are two 12 VAC wall mount transformers available for the Model 102: a 120
VAC to 12 VAC transformer for a 90
– 130 VAC input, and a 220 VAC to 12
VAC transformer for a 200 – 250 VAC input. Specify the supply type to match
the AC line voltage when ordering.
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