Lake Shore 370, Руководство пользователя

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Lake Shore Model 370 AC Resistance Bridge User’s Manual
CHAPTER 1
INTRODUCTION
1.0 GENERAL
This chapter provides an introduction to the Model 370 AC Resistance Bridge. The Model 370 was designed and
manufactured in the United States of America by Lake Shore Cryotronics, Inc. The Model 370 features include the following.
Model 370 Features
•
Resistance measurement ranges from 2 m Ω to 2 M Ω
•
21 excitation levels from 3.16 pA to 31.6 mA
•
Displays real-time sensor excitation power
•
One sensor input (up to 8 or 16 with scanner)
•
PID temperature control
•
IEEE-488 and RS-232C interfaces, alarms, relays, and analog outputs
•
Unique noise-reduction elements:
o
Patented* current source preserves common mode noise rejection
o
Optically isolated measurement electronics eliminates the potential for ground loops
Two 16-channel scanners:
•
Model 3716 scanner is optimized for low DC bias current
•
Model 3716L scanner is optimized for low noise
8-channel preamp/scanner:
•
Model 3708 scanner is optimized for ultra-low noise AC resistance measurements
Front.bmp
Figure 1-1. Model 370 Front Panel
* U.S. Patent #6,501,255, Dec., 2002, “Differential current source with active common mode reduction,” Lake Shore
Cryotronics, Inc.
Introduction 1-1