
39
ZTKS0213 / Z31939 / Rev.: 01
Operation
5.5
Cooling Down
Precondition
•
Magnet system is evacuated to a vacuum of better than 1 x 10
-4
mbar at room tem-
perature(see section
"Evacuating the Cryostat" on page 28
).
•
Vacuum pump still running.
•
Power supply operation Cernox mode.
•
BCFC checked.
Procedure (Water cooled compressor unit F-50H)
•
Make sure that the switches (1) and (2) are in default mode as indicated on the
yellow labels (see
).
•
Start the compressor F-50H using the switch "DRIVE" on the front panel of the
compressor (see
•
The rhythmic noise of the cold head will immediately start.
•
The compressor status is displayed on the BCFC (see
). The four indicators of the compressor (temperature okay, gas
pressure okay, input power, running) must be active (green).
•
Use the "DISPLAY CERNOX" mode of the power supply to monitor the temperature
of the main coil. Cool down procedure from room temperature to base temperature
takes up to 96 h.
•
When the system has reached base temperature close the vacuum valve and dis-
connect the pump (see section
"Rebuilding Vacuum" on page 31
Procedure (Air cooled compressor unit CNA-61)
•
Start the compressor CNA-61 using the "DRIVE SWITCH" on the front panel of the
compressor (see
•
The rhythmic noise of the cold head will immediately start.
Figure 5.12: Front panel of the compressor unit F–50H (water cooled)
1 COLD HEAD DRIVE (For Maintenance Only)
2 REMOTE DRIVE
3 DRIVE
Summary of Contents for EPR 12T Cryogen Free
Page 1: ...Version Innovation with Integrity EPR 12T Cryogen Free 01 User Manual EPR Spectroscopy ...
Page 6: ...6 ZTKS0213 Z31939 Rev 01 Contact ...
Page 25: ...25 ZTKS0213 Z31939 Rev 01 4 Assembling Approved persons Bruker Service only ...
Page 26: ...26 ZTKS0213 Z31939 Rev 01 Assembling ...
Page 48: ...48 ZTKS0213 Z31939 Rev 01 Operation ...
Page 54: ...54 ZTKS0213 Z31939 Rev 01 Maintenance ...
Page 55: ...55 ZTKS0213 Z31939 Rev 01 8 Disassembling Approved persons Bruker Service only ...
Page 56: ...56 ZTKS0213 Z31939 Rev 01 Disassembling ...
Page 58: ...58 ZTKS0213 Z31939 Rev 01 Warning Signs ...
Page 60: ...60 ZTKS0213 Z31939 Rev 01 List of Figures ...
Page 62: ...62 ZTKS0213 Z31939 Rev 01 List of Tables ...
Page 64: ...64 ZTKS0213 Z31939 Rev 01 Glossary ...
Page 80: ...Bruker Corporation info bruker com www bruker com Order No Z31939 ...