2 400/54 Premium Shielded NMR Magnet System Product Overview
3 Maintenance
Commissioning and Decommissioning the Magnet 32
General safety note 32
Cryostat Maintenance 35
General maintenance 35
Cryogenic Fills 38
Safety during cryogen fills 38
How to perform a routine LN2 fill 38
How to perform a standard helium fill (top-up) 40
Parts List and Order Form 50
Parts Quotation Request 51
Information Sheet 53
4 Reference
Nitrogen Probe Calibration Chart — 400/54 Premium Shielded 56
Helium Probe Calibration Chart — 400/54 Premium Shielded 57
Temperature Sensors — 400/54/ASP 59
Platinum resistor thermometers (PT100) 59
Allen-Bradley temperature sensors 59
Location of temperature sensors 59
Wiring Diagram 60
10-pin seal pin designations, 400/54/ASP 60
19-way shim socket pin designations – 400/54/ASP 62
5 Agilent E5025 Cryogen Monitor
Safety 66
Compliance Notice 67
Overview 68
Description and Operating Principle 70
Technical specification 72
The Top-Level USER Menu 73
Manually reading the helium probes 73
Changing to the Helium Fill mode 73
Checking both Helium probe readings 74
The Secondary Level SET-UP Menu 75
Entering the secondary level SET-UP menu 75
Functions available on the secondary level SET-UP menu 75
Cryogen Monitor User Interface 79
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