Ametek ORTEC MOBIUS-B User Manual Download Page 1

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ORTEC

MÖBIUS Recycler

Condensing Liquid Nitrogen

HPGe Detector Cooling System

User Manual

Printed in U.S.A.

ORTEC® Part No. 805709

0514

Manual Revision F

™

Summary of Contents for ORTEC MOBIUS-B

Page 1: ...ORTEC M BIUS Recycler Condensing Liquid Nitrogen HPGe Detector Cooling System User Manual Printed in U S A ORTEC Part No 805709 0514 Manual Revision F...

Page 2: ...482 4411 or by facsimile transmission 865 483 2133 of the nature of the fault of the instrument being returned and of the model serial and revision Rev on rear panel numbers Failure to do so may cause...

Page 3: ...N 9 3 1 ASSEMBLING THE SYSTEM 10 3 2 FILLING WITH LN2 11 3 3 SAFETY AND EQUIPMENT WARNINGS 13 3 3 1 Liquid Nitrogen Safety 13 3 3 2 Other Precautions 14 3 3 2 1 HANDLING POPTOP DETECTOR CRYOSTAT ASSEM...

Page 4: ...TEC technical support personnel and authorized in writing in advance of such modifications SAFETY INSTRUCTIONS AND SYMBOLS This manual contains up to three levels of safety instructions that must be o...

Page 5: ...805709F 1115 ORTEC M BIUS Recycler HPGe Detector Cooling System v Intentionally blank...

Page 6: ...PROPERTY OF AMETEK INC ORTEC ORTEC M BIUS Recycler HPGe Detector Cooling System 805709F 1115 vi M BIUS B w HJ style cryostat M BIUS B w PopTop cryostat M BIUS w PopTop cryostat...

Page 7: ...manual 1 1 HOW M BIUS WORKS The M BIUS has a computer controlled pressure system that maintains a constant and stable 0 5 psi 3 5 kPa in the vapor space of the dewar A pressure transducer feeds the pr...

Page 8: ...pply and cooler electrically isolated from the dewar and protected from LN2 spillage LN2 Level Sensing Capacitance level sensor provides continuous measurement of the LN2 level from 0 100 full Use wit...

Page 9: ...ded for indoor use Intended for altitude up to 2000 m 6562 ft Mains supply voltage fluctuations up to 10 of the nominal voltage Transient overvoltages up to the levels of overvoltage category II Pollu...

Page 10: ...ontains a universal ac mains power cord and a set of region specific outlet Fuse kit contains fuse block and fuses use the 250 V 10 A time delay slo blo fuses for 120 V ac mains power and the 250 V 5...

Page 11: ...805709F 1115 ORTEC M BIUS HPGe Detector Cooling System 5 Figure 3 M BIUS Top Panel Features 2 Figure 4 Rear Panel Features...

Page 12: ...e etc Replace the cover and tighten the screws just enough that they will not vibrate loose Do not over tighten This seal is intended as an air dam not a pressure seal so tighten the screws just enoug...

Page 13: ...PGe Detector Cooling System 7 Figure 6 Remove Protective Foam Block and Caution Tag Under Cooler Cover and Keep for Future Use Figure 7 Underside of Fuse Block is Keyed Figure 8 Insert Keyed Side Down...

Page 14: ...niversal power cord adapts for almost any mains power configuration Simply choose the plug that matches your outlet Figure 9 and press it onto the power cord The other end is a standard female IEC con...

Page 15: ...ight involves the interplay of shield height adjustment typically requires a hydraulic jack and wrench the thickness of acoustic damping material and or other spacers under the dewar and the insertion...

Page 16: ...the spacers damping materials M BIUS and detector cryostat assembly beside the shield to make preliminary height estimates cryostat and shield height adjustments etc Otherwise place the M BIUS under...

Page 17: ...ill show X depending on the level of LN2 currently in the dewar 4 With the remote status display clearly visible open the two fill vent valves on the front of the dewar Figure 2 This will depressurize...

Page 18: ...rbed overnight to allow the detector and M BIUS to completely cool down During cooldown leave the M BIUS fill vent valves open 11 A warm detector causes a significant amount of LN2 to boil off at firs...

Page 19: ...ther remediation unless authorized to do so by our ORTEC Global Service Center If water accumulates in the dewar remove the LN2 obtain a cylinder of high purity oil free dry nitrogen gas not house nit...

Page 20: ...r Precautions 3 3 2 1 HANDLING POPTOP DETECTOR CRYOSTAT ASSEMBLIES Grasp the assembly just beneath the base of the detector capsule where the cable exits the base plate or by the preamplifier shroud s...

Page 21: ...re re cooling Typical warm up time for most detectors is 24 hours For higher efficiency detectors 70 allow 36 hours warmup time To determine if the detector is cool enough to be operated attempt to tu...

Page 22: ...ower levels which can adversely affect detector performance due to increased vibration Therefore ORTEC recommends cleaning the filter every 3 months more often in areas with higher than normal dust le...

Page 23: ...n a cylinder of high purity oil free dry nitrogen gas not house nitrogen Connect to the fill valve and stream at very low pressure to gently boil off the LN2 and evaporate any water from inside the de...

Page 24: ...es to cool down e g 12 to 36 hours or more 4 5 REMOVING THE DETECTOR CRYOSTAT ASSEMBLY This procedure requires two people and a step stool If the detector is still cold the person working beneath the...

Page 25: ...you place it on a surface such as a bench chock it so it cannot roll If placed in contact with insulating materials such as foam the o ring in the detector capsule may freeze and breach the capsule va...

Page 26: ...PROPERTY OF AMETEK INC ORTEC ORTEC M BIUS Recycler HPGe Detector Cooling System 805709F 1115 20 Intentionally blank...

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