Introduction
10 Z33081_00_001
2.2 PrincipleofOperation
Ortho and parahydrogen are two spinisomers of hydrogen which occur naturally in the
ratio 3:1 at room temperature. Parahydrogen has a lower ground state energy than
orthohydrogen and therefore the parahydrogen content increases at lower temperatures.
The quantummechanical transition probability from ortho to parahydrogen is very low
unless the gas is brought into contact with acatalyst. In the BPHG 90, hydrogen gas at
roomtemperatureiscooledinthecryocoolertobelow40Kandfedthroughaconversion
chamberwithacatalyst,resultinginaparahydrogencontentcloseto90%.
2.3 InstallationandInitialCommissioning
Installation, initial commissioning, retrofitting, repairs, adjustments or dismantling of the
device must only be carried out by Bruker Service or personnel authorized by Bruker.
DamageduetoservicingthatisnotauthorizedbyBrukerisnotcoveredbyyourwarranty.
2.4 LimitationofLiability
All specifications and instructions in this manual have been compiled taking account of
applicablestandards and regulations,the currentstate oftechnology and theexperience
andinsightswehavegainedovertheyears.
Themanufactureracceptsnoliabilityfordamagedueto:
• Failuretoobservethismanual.
• Improperuse.
• Deploymentofuntrainedpersonnel.
• Unauthorizedmodifications.
• Technicalmodifications.
• Useofunauthorizedspareparts.
Theactualscopeofsupplymaydifferfromtheexplanationsanddepictionsinthismanual
inthecaseofspecialdesigns,takeupofadditionalorderingoptions,orasaresultofthe
latesttechnicalmodifications.
Theundertakingsagreedinthesupplycontract,aswellasthemanufacturer'sTermsand
Conditionsand Termsof Delivery, and the legalregulations applicableat thetime ofthe
conclusionofthecontractshallapply.
2.5 Copyright
Thismanualisprotectedbycopyrightandintendedsolelyforinternaluse.
Thismanualmustnotbemadeavailabletothirdparties,duplicatedinanymannerorform
–whetherinwholeorinpart–and the contentmustnotbeusedand/orcommunicated,
exceptforinternalpurposes,withoutthewrittenconsentofthemanufacturer.
Violation of the copyright will result in legal action for damages. We reserve the right to
assertfurtherclaims.
2.6 WarrantyTerms
Thewarrantytermsareincludedinthemanufacturer'sTermsandConditions.