Bruker BPHG 90 - Maintenance of the BPHG 90; Periodic Maintenance

Maintenance
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9 Maintenance
The BPHG 90 is a low maintenance instrument and the critical components have been
selectedtoensurealongoperatinglifetime.Periodicmaintenanceshouldbecarriedout
on a yearly basis by trained service personnel. The periodic maintenance actions are
summarizedinthesectionPeriodic Maintenance [}57].
User maintenance is limited to cleaning the instrument, ensuring an adequate level of
coolant for the closed loop cooling system is maintained, and replacing fuses when
needed.AfulldescriptionoftheseactionsisgiveninsectionHydrogen Gas Sensor [}58].
9.1 PeriodicMaintenance
Several system components of the generator (H
2
 gas sensor, coolant pump, fans, H
2
purifier cartridge) may need a periodic maintenance. The instrument monitors the
operatingtimeoftheactivecomponentsand,whentheirservicetimeintervalhaselapsed,
maintenancewarningsareshown(seesectionOperating Information [}46]).
A first (noncritical) maintenance warning occurs when the operating time has reached
90% of the service interval of a component. After such a warning the instrument will
continue to operate normally but maintenance warnings are repeated at preset intervals
until the operating time has reached 100% of the service interval. At that point the
instrumentcannolongerbeoperateduntilservicehasbeencarriedout.
TheperiodicmaintenanceoftheinstrumentsshouldbecarriedoutbyBrukerService.Itis
recommended to arrange a service visit immediately following the first maintenance
warning.
9.1.1 HydrogenGasSensor
The internal hydrogen gas sensor must be tested every 12 months by a trained service
technician.Itislocatedinsidethecabinetontherearpaneloverthevacuumpump.
9.1.2 VacuumPump
The vacuum (diaphragm) pump needs to be checked for wear and tear every 10000
operatinghours(approximately1yearoffulltimeoperation)andreplacedifnecessary.
9.1.3 CoolantCircuit
9.1.3.1 CoolantReplacement
The coolant level needs to be maintained by the user (see section Cryocooler Coolant
Circuit [} 58]). The cooling circuit of the cryocooler will be cleaned and the coolant
replacedduringtheannualmaintenance.
9.1.3.2 FansandRadiator
Thecoolant radiatorfins need to be cleaned and thefans bechecked forwear andtear
duringtheannualmaintenance.Theywillbereplacedifnecessary.