INTRODUCTION
7
Helium Compressors, Models F-70H and F-70L
The compressors are designed to deliver high-pressure, oil-free, helium gas to cryogenic
refrigerators. Cold head cables are used with the compressor to supply electrical power to cold
heads. Self-sealing gas couplings allow for easy connection to and disconnection from the rest
of the closed-cycle cryogenic refrigeration system.
The information in this manual pertains only to the F-70H (high voltage model) and the F-70L
(low voltage model) Compressors. Other components used to form an operating system are
described in separate technical manuals.
Pressures are stated as gauge, not absolute. Pressure units are bar and pounds per square
inch (psig). For reference:
1 bar = 14.5 psig.
1 MPa = 10 bar
Definition of Symbols used in this manual and on equipment
Reference: F-70H and F-70L Helium Compressors Operating Manual, P/N 267055A.
Summary of Contents for F-70H
Page 2: ......
Page 8: ...4 This page is intentionally blank...
Page 10: ...6 This page is intentionally blank...
Page 12: ...8 This page is intentionally blank...
Page 14: ...10 This page is intentionally blank...
Page 28: ...24 This page is intentionally blank...
Page 40: ...Troubleshooting 36 Figure 4 F 70H Compressor Wiring Diagram...
Page 41: ...Troubleshooting 37 Figure 5 F 70H Compressor Wiring Schematic...
Page 42: ...Troubleshooting 38 Figure 6 F 70L Compressor Wiring Diagram...
Page 43: ...Troubleshooting 39 Figure 7 F 70L Compressor Wiring Schematic...