B08_-_Attachment_4_-_PMS_PM_Checklist_F1040_Issue_5.xlsx

PM Checklist

Customer:

Contact: Instrument serial no:

Instrument type: 1 Safe area? TRUE

Engineer: Visit start date: 1 Fomblin? FALSE

Initial configuration notes:

5.1 Safety

Initial safety checks completed and any issues addressed

5.2 Initial Review and Pre-Checks

a) graham.josland: Note any issues reported by the instrument user at the initial meeting of the PM visit. Also check with the user that all the required communication and IO channels are working correctly.

No issues reported by user Initial IO function confirmed as OK (by user)

b) graham.josland: Visually inspect the external condition and general installation of the instrument. This should include general cleanliness of the instrument, obstructions to airflow for cooling (enclosure and pump) and safe access. Also check the condition and correctness of external pipework in the immediate vicinity of the instrument, looking for any bad practice that might lead to problems in the future. Remember that any of this might have changed from, or have been missed on, a previous visit.

External visual inspection OK c) graham.josland: Visually inspect the internal condition of the instrument. Dust might indicate that the instrument has been operated with the door open / cover removed or (for a BT) a failure of the air filter.

Note any unauthorised modifications made to the instrument. Any such modifications might void the system warranty, invalidate any certifications or listings applicable to that system and create safety hazard - electrical, mechanical or gas related. This is especially true for hazardous area systems where modifications are generally not allowed, may create an explosion risk and potentially invalidate any hazardous area certification. Concerns must be reported to the user in writing.

Internal visual inspection OK

e) graham.josland: In ‘Control Centre’, start a scan (typically) of mass 28 and record the identity of the stream used for this scan. Where possible, to obtain a consistent result, a calibration gas should be used. Select a gas such as air or nitrogen that will give the closest to a ‘correct’ pressure reading.

Check the instrument Status display for any alarms or readings that might indicate a fault or pending fault (compare with previous Status readings for that instrument). Record a copy of the Status file (PDF format where possible) and verify that the copy is OK.

Switch to the other filament and repeat (this latter step can be omitted if it is known that the ion source will be replaced as part of the PM visit).

g) graham.josland: Using the above selected gas stream, record scans of repeller and deflector curves and compare with scans recorded during the previous the PM visit. Check for significant changes, particularly in the position of the maximum points.

Repeller & deflector curves recorded No significant changes from recorded curves

i) graham.josland: Using a suitable zero gas (typically helium), check the signal to background ratio (mass 32 in air/mass 32 in helium) For Sentinel systems, check also the mass 28:mass 32peak height ratio in a clean air sample. The results should be within the following limits. If not, leak check the system – the problem might need to be addressed while the system is shut down for maintenance.

k) graham.josland: Check that all internal/external fans are operating (including air amplifiers for Ex systems).

For PRO systems, close the door and record the cabinet temperature over a period of at least 15 minutes (this could be part of an analysis method). Check that the cabinet temperature cycles less than ±1°C, and the cycle time is less than 2 minutes. Check for any evidence of condensate at the end of the drain pipe. This will be due to either running with the door open or using purge air with high moisture content - in either case, this should be reported to the user.

For BT systems, check that the fans switch off when the top cover is removed.

5.3 System Shutdown

Notes for Sections 5.1 - 5.3

5.4 Maintenance Activities

graham.josland: Inspection - check the molecular sieve material for discolouration or the presence of oil.

Capillary replaced

graham.josland: Source Checks (1) Look at the data recorded during the Pre-Checks and determine if any further action is required. For example, significant increases in the source:trap current ratio, poor peak shape, analytical stability, drifting repeller or deflector profiles could indicate that filament replacement or a source clean (or replacement) is required. If filament replacement is considered appropriate, replace both filaments.

If performance is not restored or is otherwise not acceptable, clean the ion source, replacing both filaments if not done already. If cleaning is not possible or practical, replace with a factory tested source.

graham.josland: b) Source Clean or Replacement

Clean the ion source, replacing both filaments.

If cleaning is not possible or practical, replace with a factory tested source.

Source cleaned If 'No', source replaced d) (see WI) TRUE Source replaced 1 TRUE

c) graham.josland: c) Source Checks (2) Look at the data recorded during the Pre-Checks and determine if any further action is required. For example, significant increases in the source:trap current ratio, poor peak shape, analytical stability, drifting repeller or deflector profiles could indicate that a source replacement is required. If so, replace with a factory tested source.

graham.josland: d) Source Replacement Only Replace with a factory tested source.

graham.josland: Contamination and Safety Before starting work, refer to Section 5.1.c).

Any solid or liquid residues encountered within the inlet system should be treated as potentially hazardous until identified and confirmed otherwise by the user. Wherever possible, take photographs of any contaminated areas. If cleaning is to be undertaken, seek advice from the user regarding the best materials for this process.

Note: any contamination, including significant quantities of dust in filters, should be treated as a failure of sample conditioning and reported to the user.

Contamination and Safety considerations noted

b) graham.josland: RMS Inlet Systems Remove the stator cover and inspect the common exhaust chamber, including the inner face of the cover. Identify which port(s) are responsible for any contamination and disconnect and inspect the corresponding incoming lines.

Remove the sample arm taking care to retain the seal and spring assembly. Check the condition of the seal face, noting the orientation of any wear lines. Check the condition of the 2µm sample arm filter (not fitted for Sentinel instruments) before removal and replacement.

Clean the stator face and cover (see (a) above), avoiding pressing any debris into the sample ports.

If reusing the sample arm seal, clean any wear debris from the seal before refitting in the same orientation. Significantly damaged seals should be replaced. It is advisable to replace any older o ring style seals with the newer PTFE collar type.

Check the tension of the RMS drive belt and adjust if required.

c) graham.josland: Solenoid (all types) and Single Point Inlet Systems Disconnect all sample lines and exhaust line and inspect the ports and the inside of the lines for any evidence of contamination (see (a) above). Further disassembly may be undertaken if cleaning is required.

Replace the filters in the inlet ports.

graham.josland: Rotary Pump Carry out one of the following, as indicated in the service contract (if nothing is indicated, execute part i.):

i. Service the pump as described in Section A.1.

ii. A full service of the rotary pump (dismantle, clean all parts and replace the vanes, seals, motor coupling etc with the items from a rotary pump service kit). Fill the pump with new oil, Edwards Ultragrade 19 or Fomblin, as appropriate for the pump type.

iii. Replace the pump with a new or service exchange pump.

graham.josland: b) Cooling System Carry out one of the following, as indicated in the service contract (if nothing is indicated, execute part i.):

i. Service the cooling system as described in section A.11.

ii. For PRO systems, replace the air conditioner fans (internal and, where applicable, external). The user should be advised that the air conditioner might need emptying and refilling with refrigerant. This could be done by any qualified air conditioning engineer and it is the user’s responsibility to organise this (the user should be made aware of the locations of the filling point and the label indicating the type and quantity of refrigerant).

For BT systems, replace the enclosure fan assembly and filter.

iii. Replace the air conditioner (PRO systems only).

Notes for Section 5.4

5.5 System Start-up

a) graham.josland: Re-establish power to the instrument enclosure by switching on any external isolator, then:

• Safe area – switch on the main isolator/plug in the mains cable.

• Z-purge – turn on the compressed air supplies and check that the purge regulator is set correctly (typically 3.0 bar). Reset the e stop button.

• ATEX/IECEx/X-purge – turn on the compressed air supplies and check that the purge regulator is set correctly (typically 3.0 bar). Check that the e stop button is in the ‘on’ (out) position. Close the enclosure door. When pressure is sensed, the purge sequence should start and run for the time indicated on the instrument Ex label, after which the main contactor should switch on. Use a suitable timer to check that the purge time is correct (±20s). At this point, switch the purge override on.

b) graham.josland: Switch on the circuit breakers and ‘Connect’ in GasWorks. Start the pumping system using the PDU switch. Verify that:

• The rotary pump starts after a few seconds.

• The vacuum gauge LED does not switch on until the turbo pump reaches 80% speed.

• The turbo pump reaches 99-100%, at which point the turbo current drops to <0.5A.

• Source (emission and high voltage) switch on only when the system pressure reaches the setpoint.

Vacuum system start-up sequence executes correctly

d) graham.josland: Switch on all heaters at the settings required for the application and check that they function correctly: ion source, inlet probe, inlet system (1 or 2 heaters, depending on inlet type).

graham.josland: a) Standard Oil (Edwards Ultragrade 19) Inspect the pump to confirm that the pump is a standard (not Fomblin) type. Check the level of oil in the sight glass, look for any oil leaks and determine if any immediate action is required.

Change the oil:

• Drain the oil and if the sight glass is dirty, remove, clean and refit.

• Refill the pump to below the maximum level indicator (approximately 0.5 l).

Remove dust deposits from the air intake grille on the end of the pump motor. Clean up any oil spills on or around the pump.

b) Fomblin Oil Inspect the pump to confirm that the pump is a Fomblin (not standard) type. Check the level of oil in the sight glass, look for any oil leaks and determine if any immediate action is required.

Check the condition of the oil in the sight glass. If clean, there is no reason to change the oil, otherwise:

• Drain the oil and if the sight glass is dirty, remove, clean and refit.

• Particulates can be removed by filtration and the oil reused. If the oil condition is still poor, consider replacement.

• Refill the pump to below the maximum level indicator (approximately 0.5 l).

Remove dust deposits from the air intake grille on the end of the pump motor. Clean up any oil spills on or around the pump. Heaters set for application and function correctly (ion source, inlet probe, inlet system)

e) graham.josland: e) Sentinel systems – start up the sample pump and check that the sample vacuum status is indicated correctly in GasWorks.

• For Ex systems (ATEX/IECEx/X-purge), verify that, on loss of sample vacuum (e.g. line disconnected in the internal sample loop or the pump is switched off), the RMS drives immediately to port 1. Verify also that a safe, pressurised, sample gas (normally instrument air) is permanently connected to port 1, and that gas continues to flow at ≥1 l/min when the sample vacuum (sample pump) is off. Check that the restoration of vacuum allows the RMS to operate normally again.

f) graham.josland: f) Ex systems – check the indicated cabinet pressure and compare with the previous recorded value. A reduction could indicate an enclosure leak. Check door seals and any other enclosure seals that have been disturbed (use a leak detector such as ‘Snoop’). The enclosure pressure should be at least 1 mbar above the setpoint.

Check that the purge condition is correctly indicated in GasWorks, as follows:

• Z-purge – with the purge air flowing, open/close the enclosure door and verify that ‘Purge Status’ is correctly indicated in GasWorks.

• ATEX/IECEx/X-purge – with the enclosure pressurised, switch the purge override function on/off and check that ‘Purge Override Status’ is correctly indicated in GasWorks.

graham.josland: Inspect the vacuum lines between the rotary pump and turbo pump/inlet system, inside and outside the enclosure. Check for kinks, deformations, internal obstructions or degradation of the material. Replace where necessary.

graham.josland: Inspection - check the molecular sieve material for discolouration or the presence of oil.

If contaminated, replace the sieve material - empty the molecular sieve material from the canister and dispose of correctly. Clean any traces of oil from the assembly and refill the canister with new material.

5.6 Post-Checks

b) graham.josland: If no problems are evident with the instrument and heaters are running correctly, switch on the remaining calibration and sample gases.

graham.josland: Remove the bowl from the oil mist filter in the pump exhaust and check that only a small amount of oil is present in the bottom (larger quantities indicate a blockage in the oil return line).

Replace the oil mist filter element. No instrument alarms indicated, both filaments and all heaters functional

c) graham.josland: Check and optimise the instrument tuning on filament #1. Note: where a new ion source has been fitted, it is strongly recommended that the factory ion source tuning is used without modification. Record an image of the peak shape (typically mass 28) using the same gas as was used in Section 5.2.e) above. Check that the intensity of the peak is suitable for the application. Record images of the repeller and deflector curves, and a copy of the Status file (PDF format where possible, check after recording).

Using the filament #1 tuning, record for filament #2 the peak shape, repeller and deflector curves and a copy of the Status file (PDF format where possible, verify after recording). Following this test, select a filament (typically #1) for long term operation. Record the instrument parameters as indicated in the checklist.

graham.josland: Replace both the turbo pump oil reservoir and 8 x ceramic rods (as per Pfeiffer instructions). Inspect the old oil reservoir – significant discolouration could indicate a need to replace the pump earlier than expected.

graham.josland: Replace the complete pump with a new or service replacement pump.

graham.josland: Clean and refurbish the cold cathode vacuum gauge. If cleaning is not possible due to the condition of the gauge head, or not practical for other reasons, replace the item.

graham.josland: Remove the leak element and inspect under magnification. Check that the pinhole is clear and that the glass tube is clean and shows no signs of cracks or damage. If the leak element is OK it can be re-used, otherwise it should be replaced.

Also inspect the leak element seal and re-use if undamaged. If a replacement is required, use either the ‘Crossflon’ ferrule type or the o-ring type (if transitioning from ferrule to o-ring, shorter screws will be required).

If the instrument sensitivity/pressure has dropped compared to previous recorded values, or there is indication of contamination in the leak element, replace the capillary.

Filament selected for use

d) graham.josland: Where applicable, check the functionality of the SEM. Record a scan of both the Faraday and SEM peaks using the same peak as selected in Section 5.2.h). Verify that the SEM peak shape is acceptable and the gain is suitable for the application.

e) graham.josland: Select a plugged inlet port (i.e. zero flow) and check that the indicated raw flow is within ±1 DAC of the flow zero setting. Adjust the zero setting if required.

Select a few sample ports and check that an expected flow is indicated (use an external flow indicator, for example part of the SCS, if available). Repeat for each calibration gas.

graham.josland: Source Checks (1) Look at the data recorded during the Pre-Checks and determine if any further action is required. For example, significant increases in the source:trap current ratio, poor peak shape, analytical stability, drifting repeller or deflector profiles could indicate that filament replacement or a source clean (or replacement) is required. If filament replacement is considered appropriate, replace both filaments.

If performance is not restored or is otherwise not acceptable, clean the ion source, replacing both filaments if not done already. If cleaning is not possible or practical, replace with a factory tested source.

f) graham.josland: Check the alignment of all peaks that are locked into the mass table, and correct if required.

graham.josland: b) Source Clean or Replacement

Clean the ion source, replacing both filaments.

If cleaning is not possible or practical, replace with a factory tested source.

Locked mass alignment checked

g) graham.josland: Check the instrument backgrounds using the procedure of Section 5.2.i) above. Verify that the background criterion is met, or is likely to be met soon (it might be that the system is still pumping down at this point – check the system pressure trend and mass 32 in helium trend).

graham.josland: Use ALT+ENTER to generate a line feed within the Notes box graham.josland: c) Source Checks (2) Look at the data recorded during the Pre-Checks and determine if any further action is required. For example, significant increases in the source:trap current ratio, poor peak shape, analytical stability, drifting repeller or deflector profiles could indicate that a source replacement is required. If so, replace with a factory tested source.

graham.josland: d) Source Replacement Only Replace with a factory tested source.

h) graham.josland: Carry out a full calibration and check the calibration report against a known good calibration report for any errors or significant differences. Also check that the maximum peak height measured in any calibration gas mixture is not too close to the maximum for the Faraday detector, i.e. not greater than 9 ×10-10A.

i) graham.josland: Set up the instrument to analyse the ‘mixed’ calibration gas, i.e. the simulated process gas (for some applications there may be more than one of these), and a small number of process streams. Run for as long as possible (at least 1 hour) and confirm that the results agree with those expected (including indicated flow rates).

graham.josland: BT systems – remove and clean the air filter (depending on the nature of the dust use a vacuum cleaner, compressed air or wash with water/detergent). Clean around the fan assembly.

PRO systems – clean the air intake guard, and fan (where applicable). Clean the air conditioner condenser section (use a vacuum cleaner or compressed air) and ensure it is free from obstructions.

Ex systems – inspect the air amplifier central bore from the bottom (inlet) side. The profiled bore must have no build up of debris or the performance will be impaired. If necessary, disassemble the air amplifiers for full cleaning.

l) graham.josland: Ex systems – verify that the instrument is left in a safe (protected) state. Purge protection must be active (where applicable purge override must be ‘off’) and all covers on Ex enclosures must be in place and tight.

graham.josland: Contamination and Safety Before starting work, refer to Section 5.1.c).

Any solid or liquid residues encountered within the inlet system should be treated as potentially hazardous until identified and confirmed otherwise by the user. Wherever possible, take photographs of any contaminated areas. If cleaning is to be undertaken, seek advice from the user regarding the best materials for this process.

Note: any contamination, including significant quantities of dust in filters, should be treated as a failure of sample conditioning and reported to the user.

graham.josland: RMS Inlet Systems Remove the stator cover and inspect the common exhaust chamber, including the inner face of the cover. Identify which port(s) are responsible for any contamination and disconnect and inspect the corresponding incoming lines.

Remove the sample arm taking care to retain the seal and spring assembly. Check the condition of the seal face, noting the orientation of any wear lines. Check the condition of the 2µm sample arm filter (not fitted for Sentinel instruments) before removal and replacement.

Clean the stator face and cover (see (a) above), avoiding pressing any debris into the sample ports.

If reusing the sample arm seal, clean any wear debris from the seal before refitting in the same orientation. Significantly damaged seals should be replaced. It is advisable to replace any older o ring style seals with the newer PTFE collar type.

Check the tension of the RMS drive belt and adjust if required.

m) graham.josland: Record serial numbers of any replaced items not already recorded in the checklist. Highlight any configuration changes (hardware or software) in the ‘Notes’ section. Inspect the service kit for completeness and make list of missing parts for reordering.

graham.josland: In addition to the health and safety elements of the specific activities to be undertaken (see WI070 Section 3), consideration must be given to other potential hazards in the on-site working environment.

a) Adhere to any safety requirements imposed by the site, including the use of PPE.

b) In addition to the above, assess the requirement for any additional precautions, such as additional PPE. This assessment should be dynamic for the duration of the visit.

c) Before opening up any gas handling parts of the equipment, ensure that external gas supplies (sample and calibration) are effectively isolated. It might also be necessary to isolate exhaust lines to prevent back flow of gases (which might be unrelated to the instrument being serviced if the exhaust system is shared) when anything is disconnected.

Extra care must be taken if the gases are toxic, flammable, asphyxiants etc. It will be necessary to purge the pipework and inlet system with an appropriate safe gas before starting work.

d) Some activities might require isolation of the mains power to the instrument. Precautions should be taken to avoid accidental switching on of power, especially when relying on an external power isolator. The user must operate any external isolation device, and the formal site tag out / lockout procedure must be followed.

e) If dust is disturbed during any part of the PM activity, particularly if using compressed air clean any part of the system, use eye protection and take appropriate precautions to avoid inhalation of the dust.

For hazardous area systems:

f) Maintenance activities will require working on the instrument in a non-protected condition (i.e. door open). Steps must be taken to ensure that the area is non hazardous before starting work and during the course of work. Approval must be sought from the responsible person on site and the formal site procedure followed (e.g. permit to work) before any work commences, especially if there is a need to leave the instrument unattended in this condition.

Additional serial numbers recorded Service kit missing items listed

n) graham.josland: Inform the user of any issues requiring their attention. Ensure that the site responsible person is informed that work is complete and that any tag out / lockout and/or permit to work documentation is closed off and complete.

graham.josland: Note any issues reported by the instrument user at the initial meeting of the PM visit. Also check with the user that all the required communication and IO channels are working correctly.

graham.josland: Visually inspect the external condition and general installation of the instrument. This should include general cleanliness of the instrument, obstructions to airflow for cooling (enclosure and pump) and safe access. Also check the condition and correctness of external pipework in the immediate vicinity of the instrument, looking for any bad practice that might lead to problems in the future. Remember that any of this might have changed from, or have been missed on, a previous visit.

graham.josland: Before starting work on the instrument, make a backup copy of the instrument database.

graham.josland: RMS Leak Check Note: this step is a requirement for Prima PRO Ex systems. Other systems might benefit from this test, if the external leak integrity of the system is critical and not monitored by any other means. Generally, this test is not necessary for Sentinel systems.

Warning!

• This test involves pressurizing the RMS and appropriate precautions should be taken to avoid over pressurisation. Exceeding 0.7 bar can damage the flow sensor.

• Correct fittings and blanks must be used.

• Read this section in full and ensure that all the required parts are available before commencing.

Remove the transfer line and blank the port with a 1/8” Swagelok plug. The RMS exhaust and all but one of the inlet ports must be blanked. If shutoff valves have been fitted in the sample lines these may be used if the pressure rating is appropriate. Otherwise, the individual ports must be blanked. Check that all the main RMS cover plate bolts are in place and tight.

Connect a supply of a clean gas (e.g. nitrogen or helium) to the remaining RMS port via a suitable shutoff valve. Also, fit a pressure 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 supply. Monitor the pressure. The test is passed if the pressure falls by no more than 0.05 bar in one hour. If a leak is suspected, search with a leak detector such as Snoop.

graham.josland: Solenoid (all types) and Single Point Inlet Systems Disconnect all sample lines and exhaust line and inspect the ports and the inside of the lines for any evidence of contamination (see (a) above). Further disassembly may be undertaken if cleaning is required.

Replace the filters in the inlet ports.

Visit closed with user

Notes for Sections 5.5 - 5.6

Josland, Graham D.: Use ALT+ENTER to generate a line feed within the Notes box graham.josland: In ‘Control Centre’, start a scan (typically) of mass 28 and record the identity of the stream used for this scan. Where possible, to obtain a consistent result, a calibration gas should be used. Select a gas such as air or nitrogen that will give the closest to a ‘correct’ pressure reading.

Check the instrument Status display for any alarms or readings that might indicate a fault or pending fault (compare with previous Status readings for that instrument). Record a copy of the Status file (PDF format where possible) and verify that the copy is OK.

Switch to the other filament and repeat (this latter step can be omitted if it is known that the ion source will be replaced as part of the PM visit).

graham.josland: Using the above selected gas stream, record a peak shape scan image (typically mass 28). Check that the flow for this stream is indicated in GasWorks. Compare with the last known recording for that instrument and check for any significant degradation of peak shape or peak height. Check that the alignment of the peak is within acceptable limits (i.e. on the flat top of the peak).

graham.josland: Remove the bowl from each of the external compressed air regulators and check that the filters are free from dust, water and oil. Any significant contamination should be treated as a fault in the compressed air supply and reported to the user.

Inspect the pneumatic pipework starting at the point where the compressed air enters the enclosure (top right corner), checking that lines are correctly connected and there are no kinks or other damage. This should include the line to the air conditioner (air amplifiers supply, white line), the internal purge air lines (blue) and all the vacuum lines (red). If there was any evidence of contamination in the compressed air filters, the internal passages of the vacuum eductor should be inspected and, if necessary, cleaned.

graham.josland: Using the above selected gas stream, record scans of repeller and deflector curves and compare with scans recorded during the previous the PM visit. Check for significant changes, particularly in the position of the maximum points.

graham.josland: Where applicable, check the functionality of the SEM. Select a peak that can be measured on both Faraday and multiplier detectors (typically mass 34 in air if air can be admitted to the system, otherwise select an alternative peak of suitable intensity). Record the height of the peak on each detector. Verify that the SEM peak shape and the gain are suitable for the application (or adjust to be suitable).

graham.josland: The exterior of the instrument enclosure should be cleaned using appropriate water based cleaners or wipes, as far as possible returning it to an ‘as new’ condition. In particular, all identification and warning labels must be readily visible.

graham.josland: Visually inspect the internal condition of the instrument. Dust might indicate that the instrument has been operated with the door open / cover removed or (for a BT) a failure of the air filter.

Note any unauthorised modifications made to the instrument. Any such modifications might void the system warranty, invalidate any certifications or listings applicable to that system and create safety hazard - electrical, mechanical or gas related. This is especially true for hazardous area systems where modifications are generally not allowed, may create an explosion risk and potentially invalidate any hazardous area certification. Concerns must be reported to the user in writing.

graham.josland: Using a suitable zero gas (typically helium), check the signal to background ratio (mass 32 in air/mass 32 in helium) For Sentinel systems, check also the mass 28:mass 32peak height ratio in a clean air sample. The results should be within the following limits. If not, leak check the system – the problem might need to be addressed while the system is shut down for maintenance.

Refer to the table in WI1070 Section 5.2.i) for the acceptable background limits.

graham.josland: Rotary Pump Carry out one of the following, as indicated in the service contract (if nothing is indicated, execute part i.):

i. Service the pump as described in Section A.1.

ii. A full service of the rotary pump (dismantle, clean all parts and replace the vanes, seals, motor coupling etc with the items from a rotary pump service kit). Fill the pump with new oil, Edwards Ultragrade 19 or Fomblin, as appropriate for the pump type.

iii. Replace the pump with a new or service exchange pump.

graham.josland: Compare a recent calibration report from the instrument PC with a known good report (generally from a previous PM or commissioning visit), checking for any significant changes in peak heights or increases in background levels (see also section i) above).

graham.josland: b) Cooling System Carry out one of the following, as indicated in the service contract (if nothing is indicated, execute part i.):

i. Service the cooling system as described in section A.11.

ii. For PRO systems, replace the air conditioner fans (internal and, where applicable, external). The user should be advised that the air conditioner might need emptying and refilling with refrigerant. This could be done by any qualified air conditioning engineer and it is the user’s responsibility to organise this (the user should be made aware of the locations of the filling point and the label indicating the type and quantity of refrigerant).

For BT systems, replace the enclosure fan assembly and filter.

iii. Replace the air conditioner (PRO systems only).

graham.josland: Check that all internal/external fans are operating (including air amplifiers for Ex systems).

For PRO systems, close the door and record the cabinet temperature over a period of at least 15 minutes (this could be part of an analysis method). Check that the cabinet temperature cycles less than ±1°C, and the cycle time is less than 2 minutes. Check for any evidence of condensate at the end of the drain pipe. This will be due to either running with the door open or using purge air with high moisture content - in either case, this should be reported to the user.

For BT systems, check that the fans switch off when the top cover is removed.

graham.josland: Use ALT+ENTER to generate a line feed within the Notes box graham.josland: Turn off the filament and ion source heater within GasWorks.

Wherever possible, shut the system down with the dry gas vent facility enabled. Use the switch on the PDU to stop the pumps. Check that the rotary pump is switched off, the vacuum gauge LED goes off and the turbo pump slows down. ‘Disconnect’ in GasWorks and then:

• Safe area systems – switch off all circuit breakers, followed by the main isolator (on a BT, unplug the power cable).

• Ex systems (all types) – close the enclosure door and record the enclosure pressure o Z-purge systems – press the e-stop button on the power isolation box and check that the enclosure power is cut. The circuit breakers and compressed air can then be switched off.

o ATEX/IECEx/X-purge – shut the enclosure door and switch off the purge override. Enclosure power should be maintained. Open the enclosure door and verify that power to the instrument enclosure is cut (main contactor switches off). The circuit breakers and compressed air can then be switched off.

Remember that, unless isolated externally, the end of the incoming power cable will still be ‘live’. Communication and IO cables may also have low voltages present on them.

graham.josland: Use ALT+ENTER to generate a line feed within the Notes box graham.josland: Re-establish power to the instrument enclosure by switching on any external isolator, then:

• Safe area – switch on the main isolator/plug in the mains cable.

• Z-purge – turn on the compressed air supplies and check that the purge regulator is set correctly (typically 3.0 bar). Reset the e stop button.

• ATEX/IECEx/X-purge – turn on the compressed air supplies and check that the purge regulator is set correctly (typically 3.0 bar). Check that the e stop button is in the ‘on’ (out) position. Close the enclosure door. When pressure is sensed, the purge sequence should start and run for the time indicated on the instrument Ex label, after which the main contactor should switch on. Use a suitable timer to check that the purge time is correct (±20s). At this point, switch the purge override on.

graham.josland: Switch on the circuit breakers and ‘Connect’ in GasWorks. Start the pumping system using the PDU switch. Verify that:

• The rotary pump starts after a few seconds.

• The vacuum gauge LED does not switch on until the turbo pump reaches 80% speed.

• The turbo pump reaches 99-100%, at which point the turbo current drops to <0.5A.

• Source (emission and high voltage) switch on only when the system pressure reaches the setpoint.

Date completed

&F Page &P of &N

RMS

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