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Thermo Fisher Scientific

Prima PRO & Sentinel PRO Mass Spectrometers User Guide

8-1

Chapter 8

Status & Tuning Parameters

Instrument status and tuning parameter values may be checked by
clicking on the Instrument Status button in the GasWorks software.
Parameters are grouped under separate tabs according to the
following headings from bottom to top:



Source



Analyser



Inlet



Collector



Power



Comms

Figure 8

–1.

Instrument Status window

Instrument

Status

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Содержание Prima PRO

Страница 1: ...Part of Thermo Fisher Scientific Prima PRO Sentinel PRO Mass Spectrometers User Guide P N 209 230 510 Revision 10...

Страница 2: ...ual However we cannot be responsible for errors omissions or any loss of data as the result of errors or omissions Thermo Fisher reserves the right to make changes to the manual or improvements to the...

Страница 3: ......

Страница 4: ...Thermo Fisher Scientific Prima PRO Sentinel PRO Mass Spectrometers User Guide v Revision History Revision Level Date Comments Rev 10 17 02 2016 Ex label changes...

Страница 5: ......

Страница 6: ...the Inlet System 2 6 Protective Clothing 2 6 Hazardous Materials 2 6 Hazardous Area Systems 2 7 Fan Noise 2 7 Site Requirements 3 1 Physical Installation 3 1 Cable Entries 3 2 Safe Area Systems 3 2 H...

Страница 7: ...4 1 Receiving the Instrument 4 1 Unpacking the Instrument 4 2 Storing the Instrument 4 2 Installation Interconnection 5 1 Introduction 5 1 Positioning the Instrument 5 1 Cable Connections 5 1 General...

Страница 8: ...mission 8 2 Filament Current 8 2 Filament Current Limit 8 2 Filament Integrity 8 3 Half Plate 1 and 2 Output Voltages 8 3 In Current Limit 8 3 Ion Energy 8 3 Repeller Voltage 8 4 Source Current 8 4 So...

Страница 9: ...Sync AC 8 11 Power Controller Status 8 11 Turbo 24V 8 11 User IO 24V 8 11 Vent Valve 24V 8 11 Communications 8 11 Host Comms Quiet 8 11 User I O 0 Comms Quiet 8 11 User I O 1 Comms Quiet 8 11 User I O...

Страница 10: ...6 Increased Safety A 7 Non Electrical A 7 Purge Operation A 8 Purge Overview A 8 Purge Operation Requirements A 9 Parameter Measurement A 10 Sample Containment System A 11 Definition and Description A...

Страница 11: ...B 11 Faraday Detector B 13 Introduction of a Gas Sample B 13 Mass Spectrometer Parameters B 15 Sensitivity B 15 Resolution B 15 Cracking Patterns B 17 Ion Types B 17 Molecular Ion B 17 Isotope Ions B...

Страница 12: ...e Mounting C 22 Dual RMS C 23 Solenoid Inlet C 27 Introduction C 27 Safety C 27 Inlet Operation C 28 Valve Operation C 30 Capillary Connection C 30 Heating C 31 Inlet Controller C 31 General C 31 Valv...

Страница 13: ...r Scientific Discrete I O D 4 Supplying Power to the External I O Circuit D 4 Indicators D 4 Analogue I O D 5 Air Conditioner E 1 Introduction E 1 Normal Operation E 1 Fault Conditions E 2 Fault Diagn...

Страница 14: ...ane assembly replaces the Prima PRO capillary molecular leak and bypass Collector slits Are 0 36 mm 0 69 mm as opposed to the standard 1 0 mm 4 0 mm on the Prima PRO Information in this is organized i...

Страница 15: ...ntific Europe Process Instruments Division Ion Path Road Three Winsford Industrial Estate Winsford Cheshire CW7 3GA UK Phone 44 0 1606 548700 Fax 44 0 1606 548711 China Thermo Fisher Scientific China...

Страница 16: ...cautions to be taken to ensure safe operation The user must account for the information provided and put in place procedures to ensure for the safety of personnel and plant To ensure personal safety s...

Страница 17: ...ard only two are displayed here Prohibited These statements explicitly PROHIBIT an action Ignoring an instruction related to a hazard highlighted with this symbol may cause an unsafe condition that co...

Страница 18: ...part of the system Failure to correctly perform the instructions and procedures in this manual or other documents pertaining to this system can result in equipment malfunction equipment damage and or...

Страница 19: ...is consistent with local safety regulations When performing repair or maintenance on the instrument Warning Before attempting to carry out repairs or maintenance isolate the mains electrical supply Ca...

Страница 20: ...n 230 C RMS Sample Probe 120 C Inlet Probe Assembly 120 C Rotary pump operating temperature 75 C Warning Ensure that the rotary pump is unobstructed Failure to do so will cause dangerous internal pres...

Страница 21: ...oves Changing or removing the glass leak Safety glasses Connecting sample lines Safety glasses Changing a filament Rubber gloves Warning The substances listed below are potentially hazardous Thoria fi...

Страница 22: ...dous Area Operation take precedence over content in the rest of the manual For Ex systems always defer to the instruction in Appendix A Hazardous Area Operation Note At full speed the noise level from...

Страница 23: ......

Страница 24: ...n the floor but fixed to a wall Free standing with wheels fitted Caution The unit is not suitable for 1 free standing with the wheels removed or 2 fixing to a wall where the base is not in contact wit...

Страница 25: ...e is permitted See Chapter 5 Installation Interconnection for further details See below for details of fibre optic cable requirements A computer specification can be requested from Thermo Fisher Scien...

Страница 26: ...k there are five links that can use fibre optic communication a pair of fibre optic converters is supplied One is to be fitted in the instrument enclosure and the other at the remote end PC DCS The in...

Страница 27: ...e should be within the limits shown in the following table Table 3 1 Vibration Limits Frequency Maximum Amplitude 20 Hz 5 mm 60 Hz 1 mm 200 Hz 0 05 mm 200 Hz 0 01 mm Where necessary the instrument sho...

Страница 28: ...nfiguration selected does not have this feature external flow monitoring will be required Calibration gases lines connect to the panel via 1 8 or 1 4 or 6 mm compression fittings as defined in the ord...

Страница 29: ...from each cylinder to the calibration panel and safe venting of pressure relief valves Caution Regulators and line materials must be compatible with the gases in question The use of good quality regu...

Страница 30: ...nlet exhaust in this case is that of the pump typically a hose connection size dependent on the pump size Note The following should be taken into account Exhaust temperature can reach 120 C depending...

Страница 31: ...the mass spectrometer If interconnection is unavoidable it should be positioned as far downstream as possible and a guaranteed positive gas flow provided to the RMS exhaust to reduce the chances of ba...

Страница 32: ...o configurations are shown in Figure 3 1 and Figure 3 2 Figure 3 1 Typical startup current profile for safe area system 240 Vac Figure 3 2 Typical startup current profile for Ex system 240 Vac 120 Vac...

Страница 33: ...s so that the internal pressure rises up to ambient Atmospheric air contains water vapour which if present in the vacuum chamber will prolong the time to pump down when the vacuum system is restarted...

Страница 34: ...gas such as nitrogen ensures that hazardous gases cannot enter the vacuum chamber and pumping lines while the system is switched off On startup there is then no possibility of gas in the analyser volu...

Страница 35: ...instrument label This must be adhered to If the pressure is likely to exceed the specified maximum additional regulation and pressure relief must be installed in the incoming line The supply must be...

Страница 36: ...mm compression A rotary oil box purge may be required to ensure a positive flow of purge gas through the rotary pump oil box to dilute and sweep the gases out into the rotary pump exhaust line The pu...

Страница 37: ...es of discrete I O analogue and or digital but may also be used for protocol converters Such units are generally stand alone requiring a mains power supply The unit can be located remotely from the ma...

Страница 38: ...in their original packaging Request inspection from the carrier within 15 days of delivery 3 days for international and contact Thermo Fisher Scientific to report the damage Move the cartons to a pro...

Страница 39: ...with details It is recommended that any peripherals packed within the crate or shipped separately are left sealed in their own packaging until ready for use Whether for an extended period or for a pe...

Страница 40: ...the air conditioning unit Caution The instrument should be positioned so as not to obstruct or impede easy access to the isolation switch Refer to the relevant site installation drawings for detailed...

Страница 41: ...eal must be created at the gland to prevent loss of purge gas down the conduit cable The fibre optic cable should pass through the enclosure wall and connect directly to the fibre optic converter with...

Страница 42: ...3 4 NPT is also supplied Warning The cable conduit entry gland used must be Exd certified in order to maintain the flameproof integrity of the enclosure Incoming cables must be rated for 80 C Live ho...

Страница 43: ...tion are made directly to the individual I O modules Warning Signal cables are connected directly to terminals on the isolation PCB in the flameproof enclosure see Figure 5 2 The entry ports in this e...

Страница 44: ...rima PRO system is connected to a Windows based computer running the Thermo Scientific GasWorks software The host port of the instrument see Figure 5 3 connects to a serial port on the computer If nec...

Страница 45: ......

Страница 46: ...ed to the office organizing the work The user must complete this form to confirm that the installation site is ready before the engineer will be allowed to travel to site The procedure followed by the...

Страница 47: ...rocess gas mixtures Performance testing will be carried out by analyzing a calibration gas typically the mixed gas which will generally be similar to the process gas in composition over a period of ti...

Страница 48: ...reed before work begins More detailed training courses are available and should be considered when some experience has been gained with the instrument For further details and a quotation contact the l...

Страница 49: ......

Страница 50: ...f top mounted flameproof enclosure pressed in All the internal circuit breakers should be switched to OFF breaker to down position Check that the TURBO RUN toggle switch middle of the front of the PDU...

Страница 51: ...instrument vacuum is at the correct level and filament emission is achieved The instrument status light is an acknowledgeable alarm indicator It should be GREEN indicating a go condition where all th...

Страница 52: ...k on a particular parameter status light will show the current value alarm limits and alarm acknowledgement button Figure 7 3 If all parameters are within limits but the status light is red clicking o...

Страница 53: ...amount of hysteresis to accommodate the pressure rise To prevent the trip circuit from immediately switching the filament off again the off trip is set higher than the on trip so a pressure reading ab...

Страница 54: ...nt please refer to Chapter 8 Status Tuning Parameters Note Control Centre should not be opened whilst Schedule is running Before running Control Centre ensure Schedule is stopped A single click on the...

Страница 55: ...lower or higher setting respectively By dragging the position indicator along the adjustment bar Several tuning regimes can be configured in which different sets of tuning settings can be grouped In...

Страница 56: ...le Lens Resolution Repeller Voltage Focus Voltage Deflection Voltage The effect on ion intensity at a selected mass default mass 28 0 of changing the repeller focus deflection and resolution voltages...

Страница 57: ...systems with both Faraday and Secondary Emission Multiplier SEM detectors As both detectors are off axis a deflection voltage is applied to divert the ion beam into the selected detector Deflector vol...

Страница 58: ...constants having a slight mass dependency Values of km and cm are determined for adjacent pairs of locked masses at masses beyond the locked mass range the values of km and cm are taken from the clos...

Страница 59: ...thin the range 10 C to 35 C Electronics temperature Within the range 10 C to 45 C System pressure Typically 5 x 10 6 mbar but application dependent Refer to installation records for setting of optimum...

Страница 60: ...s will be required for routine maintenance etc The emergency shutdown procedure later in this chapter should also be followed in the event of a power failure The following steps should be carried out...

Страница 61: ...on device the latter is equivalent to a power cut or in the case of an Ex system the purge controller switching off the power 2 The system heaters will now be de energized and gas handling parts of th...

Страница 62: ...rument status and tuning parameter values may be checked by clicking on the Instrument Status button in the GasWorks software Parameters are grouped under separate tabs according to the following head...

Страница 63: ...s to give a lower abundance of fragment and multiply charged ions which in certain applications can help reduce the extent of component overlap and therefore analytical complexity The Emission status...

Страница 64: ...ge This is particularly important where analytical data is critical and an unscheduled shutdown caused by failure of a second filament could have additional consequences Two 1 2 plates positioned afte...

Страница 65: ...d at the trap electrode The proportion of the electrons traversing the source to the trap electrode normally results in a source current 2 to 5 times greater than that of the trap A source current ten...

Страница 66: ...d should read less than 35 C The temperature in the electronics is monitored by a sensor and should read less than 50 C A value of 1 in the Magnet Controller Status field indicates this unit is operat...

Страница 67: ...essure as reported by a Penning vacuum gauge head that is mounted on the top right of the vacuum chamber and is a measure of the high vacuum produced by the turbo molecular pump The pressure as measur...

Страница 68: ...ship can be expressed as U 10 5 log10P The high pressure trip see Pressure Set Point earlier in this chapter prevents operation of the emission circuit ion energy multiplier and source heater as descr...

Страница 69: ...n the inlet controller electronics It is typically approximately 45 C The RMS Body Temperature as monitored by thermocouple in the RMS block is normally set in the range of 50 to 120 C depending on th...

Страница 70: ...standard single MCP SEM and 10000 for a dual MCP SEM In conventional sector mass spectrometers compensation for errors in analyser geometry magnet fringing field effects and beam aberrations resultin...

Страница 71: ...y greater than mass 5 the voltage for the resolution deflector will be close to zero Below the switch point the voltage will be around 250 V for systems with 1000 V ion energy deflecting the beam thro...

Страница 72: ...24 V PDU output for the turbo molecular pump drive electronics The User IO 24V parameter is the 24 V PDU output for the user I O The Vent Valve 24V parameter is the 24 V PDU power supply for the turbo...

Страница 73: ...s toolbar click the icon to open Control Centre If the system has not been tuned previously use the Peak Shape and Sensitivity tabs to do so Type in the required value for each parameter and press Ent...

Страница 74: ...18 due to O from oxygen and water OH and H2O from water 40 0 94 Argon and 44 350 ppm CO2 12 2 x 16 If alignment is poor the simplest approach is to delete the locked peak table by stopping the scan a...

Страница 75: ...a PRO Sentinel PRO Mass Spectrometers User Guide Thermo Fisher Scientific For example in an ethylene cracker application it is necessary to align the peaks only at masses 2 H2 and 78 C6H6 to give accu...

Страница 76: ...low Table 9 1 Diagnosing alarm conditions Device Typical Reading Set Point Low Set Point High Typical Cause Electron Energy 70 10 volts 30 00 volts 95 00 volts ASU failure Emission 1 0 5 1 5 Power par...

Страница 77: ...m Pressure Trip OK OK Still pumping or leak or pump failure Turbo Disable Off Off Turbo switched to stop on PDC Turbo Motor Current 0 62 amps 0 01 amps 4 00 amps Turbo adjustment or failure Turbo Oper...

Страница 78: ...olts PDC fuse or switch mode ps Instrument CPU 5V 4 8 volts 4 8 volts 5 3 volts PDC fuse or switch mode ps Magnet AC 38 8 volts 12 0 volts 50 0 volts PDC or switch mode ps Magnet Current 2 84 amps 0 1...

Страница 79: ...uum system Finer gas flows may be required to help pinpoint the exact location of the leak Leaks may sometimes occur at elastomer seals particularly after they have been disturbed First check that the...

Страница 80: ...ort circuit the filament current will be at filament limit with no trap current In Control Centre set the Ion Energy and Focus Voltages to zero Disconnect the socket from the source flange plug Check...

Страница 81: ...to be the reverse of mixtures that are net reducing Where an instrument has either been idle or analyzing a radically different sample stream there will be an initial stabilization in the filament ch...

Страница 82: ...lows Fragmentation Can only be selected when there are no overlaps in the spectra of the gas component at the selected masses with those of any other gas in the cylinder Background Enable for backgrou...

Страница 83: ...lms on metal surfaces which in turn can charge up and disturb the local field potentials This usually results in a reduction in sensitivity and or a distorted peak shape In this event it will be neces...

Страница 84: ...Fault Diagnosis Filament Failure Thermo Fisher Scientific Prima PRO Sentinel PRO Mass Spectrometers User Guide 9 9 Figure 9 1 Source plug pinout external feed through...

Страница 85: ......

Страница 86: ...ernal air circulation and clean as required Every 6 months Rotary pumps Change oil Every 3 years Turbo molecular pump Service pump May vary depending on application and environment Caution Additional...

Страница 87: ...nd replenished if necessary If a significant loss of oil has occurred this should be investigated according to instructions provided by the pump manufacturer manual supplied Routine oil changes are no...

Страница 88: ...Warning Lethal Voltages Lethal voltages are present within the Prima PRO enclosure Isolate the mains electrical supply before attempting any maintenance activity on the pump Warning Hazardous Substanc...

Страница 89: ...fully withdraw the source Note The filaments are positioned against a stop on one side and are hooked over the anodized aluminium insulating plates They are secured by slotted knurled nuts The filamen...

Страница 90: ...d ensure these are open circuit 50 M 5 Refit the source connection ring in the analyser housing and secure with 3 x M3 cap head screws A dowel pin in the analyser housing ensures the correct orientati...

Страница 91: ...t the connection ring These magnets should NOT be removed Care must be taken to prevent contact between magnetic materials e g a screwdriver and the magnets These magnets have a high field strength bu...

Страница 92: ...le use of an ultrasonic bath is recommended a Wash off all traces of abrasive pastes according to type Use deionised water for water soluble pastes or recommended solvents as per manufacturer s instru...

Страница 93: ...the main coils to the power PCA The electromagnet will fail to operate if these are not refitted in the correct sequence Figure 10 7 Disconnecting the wiring 2 Using two 19 mm ratchet ring spanners j...

Страница 94: ...9 Lift out coil assembly 4 Unscrew the four pole piece locating screws and remove the front magnet pole piece Figure 10 10 Figure 10 10 Removing the front magnet pole piece 5 The Z restrictor is a thi...

Страница 95: ...referably in an oven at 100 C for one hour 8 Visually inspect the magnet pole pieces for any remaining contamination and repeat steps 6 and 7 if necessary 9 Refit the rear magnet pole piece and Z rest...

Страница 96: ...urbo pump 24 V 4 A ATO Littelfuse 257 004 F7 Vent valve 24 V 1 A ATO Littelfuse 257 001 F8 Aircon fan 24 V 2 A ATO Littelfuse 257 002 F9 CPU carrier 24 V 1 A ATO Littelfuse 257 001 F10 User I O 24 V 4...

Страница 97: ...Number Supplied Unit s Voltage Rating Type F3 Inlet control and RMS drive 24 V 4 A ATO Table 10 5 Ex isolation box Ex systems only Fuse Number Supplied Unit Voltage Rating Type F1 PSU 115 230 V 1 A 5...

Страница 98: ...ected by other methods as outlined below Detailed operation of the purge control equipment used on a particular system is given in the respective manuals for that equipment and these should be read in...

Страница 99: ...appendix External enclosure materials are carbon steel epoxy powder painted and stainless steel The enclosure should not be exposed to an environment that might cause significant degradation to any of...

Страница 100: ...ations the person on site with overall responsibility for hazardous area safety must be informed preferably in writing The factory should also be consulted Do not modify any part of the purged enclosu...

Страница 101: ...between European and North American terminology Only hazards due to flammable gases and vapours will be considered The presence of dusts and fibres may also cause an area to be defined as hazardous bu...

Страница 102: ...lectrical apparatus represents the maximum surface temperature that can occur in normal operation or if appropriate a fault condition and is normally determined as part of the certification process A...

Страница 103: ...sation then becomes a continuous purge and the purge flow rate must be such that the worst case internal leak is diluted to a safe level A summary of the different purge types is given below Table A 4...

Страница 104: ...ed to maintain the flameproof integrity of the enclosure This might involve some form of potting with an epoxy compound of the cable into a cable gland and may also restrict the type of cable that can...

Страница 105: ...An inert gas such as nitrogen should not be used for the purge system There is no facility to duct away vented purge gas so the asphyxiation hazard is considerable if operated in a confined or poorly...

Страница 106: ...ower switch off 4 second warning then automatic power switch off Alarm generated Purge fail override Controller function password protected Controller function password protected N A The following tab...

Страница 107: ...greater than this the set point of the enclosure pressure switch will have been adjusted to suit In the event of any problems or suspected problems with the purge control equipment or when certain par...

Страница 108: ...elow This is governed by pressure in both the sample and exhaust lines and it is a user responsibility to maintain the value below the defined maxima for the instrument Maximum pressure in sample cont...

Страница 109: ...epper motor Sentinel PRO Ex In the Sentinel PRO Ex the situation is different in that flow through the sample loop the sample containment system is much higher compared to the Prima PRO Ex typically 5...

Страница 110: ...maintain safe operation of the overall system however the integrity of the sample containment system should be checked periodically at least annually as part of a general preventative maintenance proc...

Страница 111: ...ressure gauge 0 to 1 bar g between this valve and the RMS or use another blanked inlet port if this is easier Pressurise the assembly to 0 5 bar g Close the isolation valve and disconnect the gas supp...

Страница 112: ...nclosure is split to allow better distribution within the enclosure and flow is constant throughout the initial purge and CDP phases The purge outlet monitor unit is powered by 24 Vdc and handles all...

Страница 113: ...re should pressurise and after a few seconds the purge controller should indicate that the pressure is OK and the Z Purge Status alarm will clear Hazardous atmospheres are prevented from entering the...

Страница 114: ...ithium thionyl chloride Li SOCl2 Thermo Scientific supply Type AA Nominal capacity 1 2Ah Nominal voltage 3 6V Turbo Molecular Pump Lithium manganese dioxide Li MnO2 3rd party supply Type Coin cell Nom...

Страница 115: ...replacement it should be noted that both the voltage and frequency of the pump need to be specified Care must be taken to correctly reinstall the flameproof gland onto the replacement pump The pump m...

Страница 116: ...based on safe area solenoid valve manifolds These are made acceptable for hazardous area use by mounting through the wall of the Exp enclosure such that the valve bodies are outside the enclosure whic...

Страница 117: ...o conduits are required to ensure there is an unobstructed path for purge air to flow from the remote to main enclosure obstruction of this path could result in an overpressure condition in the remote...

Страница 118: ...The requirements in the case of the latter will vary depending on the local regulations in force and the area classification Note that systems using fibre optic require a different ATEX IECEx certific...

Страница 119: ...rned for servicing investigation etc In the event that any cable gland in the enclosure need replacement it is important that the correct size and type of gland are used See Figure A 1 for identificat...

Страница 120: ...ir supply pressure low or line capacity inadequate Check pressure at instrument Increase line capacity bigger diameter line shorter line length or different air source b Enclosure leaky Cannot be suff...

Страница 121: ...r air supply pressure Check air supply capacity is not marginal Modify air supply as required b Enclosure pressure too close to set point Treat as possible causes b c and e listed for symptom 1 Adjust...

Страница 122: ...ATEX EN 60079 0 2012 A11 2013 EN60079 2 2014 IEC IEC 60079 0 2011 6th Ed IEC 60079 2 2014 6th Ed IEC 60079 28 2015 2nd Ed Figure A 2 to Figure A 9 show the instrument labels and give the full certifi...

Страница 123: ...Hazardous Area Operation Standards Conformance A 26 Prima PRO Sentinel PRO Mass Spectrometers User Guide Thermo Fisher Scientific Figure A 2 Prima PRO Ex instrument label...

Страница 124: ...Hazardous Area Operation Standards Conformance Thermo Fisher Scientific Prima PRO Sentinel PRO Mass Spectrometers User Guide A 27 Figure A 3 Prima PRO Ex with fibre optics instrument label...

Страница 125: ...s Conformance A 28 Prima PRO Sentinel PRO Mass Spectrometers User Guide Thermo Fisher Scientific Figure A 4 RMS enclosure label Prima PRO Ex with remote RMS Figure A 5 RMS enclosure label Prima PRO Ex...

Страница 126: ...Hazardous Area Operation Standards Conformance Thermo Fisher Scientific Prima PRO Sentinel PRO Mass Spectrometers User Guide A 29 Figure A 6 Sentinel PRO Ex instrument label...

Страница 127: ...Hazardous Area Operation Standards Conformance A 30 Prima PRO Sentinel PRO Mass Spectrometers User Guide Thermo Fisher Scientific Figure A 7 Sentinel PRO Ex with fibre optics instrument label...

Страница 128: ...onformance Thermo Fisher Scientific Prima PRO Sentinel PRO Mass Spectrometers User Guide A 31 Figure A 8 RMS enclosure label Sentinel PRO Ex with remote RMS Figure A 9 RMS enclosure label Sentinel PRO...

Страница 129: ......

Страница 130: ...C all components are mounted either within or on the instrument enclosure and are modular for ease of replacement The main components are provided in the following table Table B 1 Prima PRO hardware M...

Страница 131: ...charge and the strength of the magnetic field This relationship is described in Equation 1 z H x MV R 2 2 Equation 1 Where R radius of orbit M mass of the particle V voltage applied to the particle to...

Страница 132: ...f a fixed position ion detector is placed at the exit from the electromagnet the mass of the ion arriving at the detector can be selected by varying the magnetic field Refer to Figure B 2 The ion sign...

Страница 133: ...A glow discharge device that operates within the pressure range 5 x 10 5 mbar to 1 x 10 7 mbar and monitors the pressure in the analyser vacuum chamber The gauge is controlled by the ASU and the outp...

Страница 134: ...on takes place in the ion source where a beam of electrons is passed through the sample gas Electrons that either collide with or pass in close proximity to the sample gas molecules cause electrons to...

Страница 135: ...ve potential difference between the source block and an additional electrode the source slit positive ions are drawn out of the ion source The ion source is held at a potential above ground termed the...

Страница 136: ...d with that of the surrounding vacuum chamber where the filament assemblies are positioned and operate This pressure differential helps suppress instrument backgrounds inherent in the vacuum chamber a...

Страница 137: ...der conditions of overpressure and is less likely to burn out and fail Thoriated iridium filaments are used for the majority of applications on the Prima PRO and Sentinel PRO Tungsten Thoria Alloy Thi...

Страница 138: ...tion of ions through the magnetic sector Two detectors are available in the collector assembly the Faraday detector and the optional MCP the operation of which are described below In conventional sect...

Страница 139: ...e On the Prima PRO instrument two resolving slits are fitted one for low mass peaks e g typically below mass 20 for the Prima PRO and below mass 100 for the Sentinel PRO and one for high mass peaks Th...

Страница 140: ...trons are produced The secondary electrons are accelerated by the electric field and travel along the parabolic trajectories determined by their initial velocity When these electrons strike the opposi...

Страница 141: ...ure B 8 Figure B 8 Multiplier Calibration 2 Choose a suitable mass with a peak height in the range of 1 to 8 x 10 13 amps on the Faraday detector Start the scan by clicking on the Start Scan button an...

Страница 142: ...re It is desirable that the flow through the leak element should be molecular i e of the same characteristics as the flow out of the ion source Failure to achieve this can result in a distortion to th...

Страница 143: ...The selected sample gas flows from the stream selector RMS to the inlet probe and membrane and then returns to the stream selector to be exhausted This loop operates at a reduced pressure typically ap...

Страница 144: ...in the gas database For example if the relative sensitivity of nitrogen measured by the instrument is 1 0 and helium measured by the instrument is 0 2 for equal quantities of nitrogen and helium in t...

Страница 145: ...the peak width at 5 level of the peak height can be easily measured For example in air when examining the nitrogen 28 peak the peak width at the 5 height can be measured and related to the difference...

Страница 146: ...nd and results from the gas molecule acquiring a single positive charge as a result of electron impact in the source An example of this type of ion would be the 14 N2 ion for nitrogen at m e 28 amu Th...

Страница 147: ...ssible to produce ion peaks that are a combination of multiple charged ions and fragment ions An example of this would be the m e 14 amu peak for nitrogen where the peak is produced from a combination...

Страница 148: ...uently two different cracking patterns stored in the software gas database These different patterns result from the mass and energy selective characteristics of the secondary electron multiplier i e t...

Страница 149: ...27 25 7 77 26 52 85 27 62 65 28 100 00 29 2 31 It is neither necessary nor recommended to include all of the peaks for a particular gas component Users should employ the minimum possible number of pea...

Страница 150: ...inhalation of contact with or ignition of these gases In general these precautions are as follows Always use the correct tubing size for the fittings supplied and the correct nut ferrule assembly Do...

Страница 151: ...service work The following table summarizes the specifications for this inlet system Detailed discussion can be found in following sections Table C 1 Inlet system specification Number of inlets 32 or...

Страница 152: ...table for hose or compression fitting depending on application Gas samples connected to the inlet ports are allowed to flow into the common exhaust chamber of the RMS Process gas samples are typically...

Страница 153: ...gas returns to a second port on the sample tube body and is returned to the common exhaust chamber via the inner tube of the sample tube assembly In both cases the returning gas passes through an ori...

Страница 154: ...clockwise and position 1 is checked each time the inlet rotates through this point This procedure has been found to give an extremely high reliability in terms of the accuracy of inlet selection Cali...

Страница 155: ...ed when selecting the exhaust line size Since the pressure required is quite low it is preferable to regulate the flow rather than the pressure In the event of a flow failure the gas mixture in the co...

Страница 156: ...r term variations outside this range may be acceptable but will require more frequent instrument calibration The easiest way to achieve the required stability is to use a direct atmospheric vent Howev...

Страница 157: ...30 V or 115 V applications respectively selected by a switch on the inlet controller PCB Insulation is provided to minimize heat loss into the enclosure A K type thermocouple is used to measure and th...

Страница 158: ...w of 10 Nl min on a single port the maximum allowed will cool the sample tube by approximately 10 C over a period of several minutes Similarly the temperature takes several minutes to recover This sit...

Страница 159: ...ll re index on the next commanded move The controller is powered from the main enclosure power supply 24 Vdc Mains power is required for the main body heater see below Fuses all on PCB F1 5 A mains F2...

Страница 160: ...s when the sample tube heater is driven on Connect the flow sensor to J17 Four opto isolated digital inputs are available J5 J6 J9 J10 Generally these are used for internal monitoring of inlet functio...

Страница 161: ...surfaces Check RMS temperature settings before starting work Adjust as required Select a port using GasWorks Control Centre Analogue Scan etc Check that the sample arm moves to the correct physical p...

Страница 162: ...lide a piece of paper between the optical transmitters and receivers and both LEDs should be off If it appears that the LEDs and hence the optical sensors are working correctly then the bracket holdin...

Страница 163: ...heater It should be 24 Vdc Check fuses if required voltage is not present This test should be carried out with the stator cover fitted Set up a continuous flow of air on one or more ports flow within...

Страница 164: ...ed if the pressure falls by no more than 0 05 bar in a 1 hour period If the test fails leak check the accessible parts of the system while still under pressure including any external connections which...

Страница 165: ...the bottom of the bore When replacing the capillary take care to locate the o ring on the end of the assembly and keep it in place during the refitting process Reinstall the transfer line fitting and...

Страница 166: ...during this operation Refit the four retaining screws ensuring the head is correctly positioned over the inlet port it was on when removed Refit the sample return seal and cover and finally refit the...

Страница 167: ...where the sample tube has been running No other signs of wear should be evident Also check the surface of the sample tube which protrudes out of the end of the main shaft There may be some slight dep...

Страница 168: ...f a change of application is anticipated adding a sample pump to a Prima PRO configuration for example consult the factory before changing the seal orientation Prize out and inspect the seal and the s...

Страница 169: ...temperature sensor and flow sensor cables Remove the bracket split pin and hinge pin holding the sample tube in place The sample tube can now be withdrawn The white PTFE bush is a fairly loose fit an...

Страница 170: ...age WILL result if these are used A fitting may need to be removed in the event of damage to the compression faces of the fitting or in the event of contamination a pocket of contaminants may reside b...

Страница 171: ...if gases are toxic or flammable In the latter case this might change the classification of the analyser room from a safe area to a hazardous area To avoid this a remote mounting option is available Th...

Страница 172: ...provide protection from blown rain or cold Service access to the valve and enclosure must be accounted for For systems with the remote RMS located in a hazardous area refer to Appendix A Hazardous Are...

Страница 173: ...ers User Guide Thermo Fisher Scientific Figure C 4 RMS assembly 32 way Prima PRO Stator Inlet ports Exhaust chamber Stator cover Sample arm Seal spring filter Return seal Main shaft seal Sample tube s...

Страница 174: ...Technical Description Inlet Rapid Multi Stream Sampler Thermo Fisher Scientific Prima PRO Sentinel PRO Mass Spectrometers User Guide C 25 Figure C 5 Controller PCB D2 D3 D4 D6 D19 D24 D25...

Страница 175: ...6 019 1 Sample tube bearing PTFE 203 217 020 2 Sample tube seal 201 110 199 1 Return seal 201 110 489 1 Sample tube Prima PRO 204 764 002 1 Sample tube Sentinel PRO 204 764 007 1 Sample tube heater 20...

Страница 176: ...imilar to the RMS Warning The following must be considered in addition to all safety notes elsewhere in this manual covering the system as a whole Depending on the nature of the gases in use sample an...

Страница 177: ...mple inlet 1 inlet option 5 seconds Sample inlet 6 inlet option 20 seconds Calibration inlet 45 seconds Notes 1 Gas must be free from liquids or materials that will condense at the operating temperatu...

Страница 178: ...nnecessary usage the calibration valve assemblies are fitted with 2 2 valves such that calibration gas will only flow when a valve is energized The calibration assembly is a manifold of six solenoid v...

Страница 179: ...embly Note The calibration panels are identical to those used with the RMS inlet system In order to provide the best possible dynamic response to sample gases a selector valve with a very low internal...

Страница 180: ...daptor block is heated by means of a heater block fixed along one side The heater block has two cartridge heaters embedded in it operating at mains voltage The heaters are connected in parallel or ser...

Страница 181: ...n the main enclosure will remove mains power from the PCB Warning Removal of F1 will only break the L L1 line Power might still be on the assembly from the N L2 line The heater block thermocouple conn...

Страница 182: ...t control PCA prior to exist in the supply to the main heater The remainder of the inlet including the capillary assembly heater is driven from a 24 Vdc supply To test the micro capillary assembly set...

Страница 183: ...system in Histogram Scan mode 0 50 amu When the helium inlet is switched in the spectrum of helium mass 4 only plus a few background peaks should be visible As with the calibration inlets the flow sen...

Страница 184: ...the selector valve couple the helium to the CALIBRATION INLET port on the solenoid inlet front panel while the blanked sample inlet is still selected Pressurise to normal operating pressure and monit...

Страница 185: ...off all gas lines If required the system should be purged with a suitable inert gas and the system exhaust isolated Liquid or solid contaminants might be encountered within the inlet assembly during...

Страница 186: ...ction PCB to which they are attached can be removed as one piece Figure C 8 Knurled nut 6 To remove the manifold from the plate unscrew the 12 M3 countersunk screws that are now exposed Note that when...

Страница 187: ...and the exhaust line 5 The assembly can now be removed from the system Unscrew the eight M6 nuts holding the mounting plate in place and carefully remove from the enclosure 6 To remove the exhaust man...

Страница 188: ...ifficult to access regions may require cleaning in an ultrasonic bath Do not use this procedure for cleaning elastomer seals as it can cause the seal to harden All metallic parts can be solvent cleane...

Страница 189: ......

Страница 190: ...re The other four channels I O 0 through I O 3 are available for communication to external expansion I O systems where I O requirements cannot be accommodated by the onboard I O described below a plan...

Страница 191: ...dicate activity on that port For each port the top pair of LEDs one green one red is associated with transmitted data and the bottom pair again one green one red is associated with received data For e...

Страница 192: ...terminal block pin numbering is identical to that of the 25 pin connector The converter requires a 12VDC power supply The item supplied includes internationally compatible mains connections and the D...

Страница 193: ...ntact or an external 24 4 Vdc Configuration is by means of jumpers on the I O CPU board Fitting the jumper labelled VF makes the input or output voltage free requiring an external supply Fitting the t...

Страница 194: ...of an Opto 22 SNAP series assembly This communicates with the instrument CPU via an RS422 link I O connections are made directly to the modules or via an isolation unit in the case of Ex systems Refe...

Страница 195: ......

Страница 196: ...rned to the compressor There are a number of points to note about the operation of the unit 1 Internal air circulation over the evaporator and through the instrument enclosure is provided by a fan mai...

Страница 197: ...DU 3 pin is as follows Pin 1 top 24V Pin 2 middle 24V alarm return Pin 3 bottom 24V The following parameters should be monitored on a continuous basis to help diagnose any suspected malfunction of the...

Страница 198: ...s that could result from failure of specific components within the system It is unlikely to be a comprehensive list there could be failure modes that have not been encountered previously or considered...

Страница 199: ...grille Check sensor connections Check response of sensors to forced temperature changes e g hand heat Use an independent temperature measuring device to determine which is correct Fault in instrument...

Страница 200: ...d operation This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protect...

Страница 201: ...the following symbol This product contains electronic parts and assemblies and should be disposed of at end of useful life in an appropriate and responsible manner Thermo Fisher Scientific has contrac...

Страница 202: ...meters User Guide F 3 Toxic Hazardous Substances Table Prima PRO Sentinel PRO Safe Area Ex For Chinese Regulation Administrative Measure on the Control of Pollution Caused by Electronic Information Pr...

Страница 203: ...Regulatory China RoHS F 4 Prima PRO Sentinel PRO Mass Spectrometers User Guide Thermo Fisher Scientific...

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