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Summary of Contents for Michell Instruments QMA Series
- Page 1 QMA SPARES REPLACEMENT GUIDE 97492 Issue 3 May 2019...
- Page 2 © 2019 Michell Instruments This document is the property of Michell Instruments Ltd. and may not be copied or otherwise reproduced, communicated in any way to third parties, nor stored in any Data Processing System without the express written authorization of Michell Instruments Ltd.
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Page 3: Table Of Contents
Replacement of the Fuse and QMA601 Control PCB ..........28 Replacement of the QMA601 Lid and Pressure Testing......... 28 10 QMA601 LID REPLACEMENT ................29 10.1 Replacement of the QMA601 Oven Lid ............... 29 10.2 Replacement of the QMA601 Lid ................ 29 11 QMA601 PRESSURE TESTING ................31 Michell Instruments... - Page 4 QMA Spares Replacement Guide 12 QMA401 ......................32 12.1 Removal of the QMA401 Cover ................32 12.2 Removal of the QMA401 Oven Lid ..............33 13 QMA401 OVEN REPLACEMENT ................34 13.1 Removal of the QMA401 Oven ................34 13.2 Replacement of the QMA401 Oven ..............35 13.3 Replacement of the QMA401 Lid and Pressure Testing.........
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Page 5: Symbols
Where this symbol appears in the following sections it is used to indicate that there is an environmental aspect relating to this part of the process Michell Instruments... -
Page 6: Description
QMA401 Control PCB Fuse (Section 16) Section 2 details all tools and consumables required to carry out the above replacements. The following forms need to be completed and returned to Michell Instruments: F0121 Decontamination Certificate (see Appendix B) Please complete this form prior to this instrument, or any components, leaving your site and being returned to us, or, where applicable, prior to any work being carried out by a Michell Instruments’... -
Page 7: Tools/Consumables Required
Pressure transducer 2 x shut off valves Pressure testing tubes Thermal paste Leak detection fluid or can be ordered from Michell Instruments as a kit: Michell Part Number: Pressure Test Kit QMA601: QMA601-SPTK Pressure Test Kit QMA401: QMA401-SPTK Michell Instruments... -
Page 8: Moisture Generator Replacement
2 x shut off valves Pressure testing tubes Thermal paste Leak detection fluid or can be ordered from Michell Instruments as a kit: Michell Part Number: Pressure Test Kit QMA601: QMA601-SPTK Pressure Test Kit QMA401: QMA401-SPTK 97492 Issue 3, May 2019... -
Page 9: Crystal Sensor Replacement
Pressure transducer 2 x shut off valves Pressure testing tubes Thermal paste Leak detection fluid or can be ordered from Michell Instruments as a kit: Michell Part Number: Pressure Test Kit QMA601: QMA601-SPTK Pressure Test Kit QMA401: QMA401-SPTK Michell Instruments... -
Page 10: O-Ring Replacement
TOOLS/CONSUMABLES QMA Spares Replacement Guide O-Ring Replacement TOOLS & CONSUMABLES REQUIRED O-ring Michell Part Number: QMA601-SORING Small flat headed screwdriver 2mm hex key Latex gloves QMA601 lid removal handles (delivered with the original analyzer) Replacement handles can be ordered: Michell Part Number: QMA601-SH (QMA601 ONLY) 97492 Issue 3, May 2019... -
Page 11: Hmi Replacement
On delivery, please check that the following component is included: QMA601 Spare HMI: QMA601-SHMI TOOLS & CONSUMABLES REQUIRED Safety goggles Gloves 2mm hex key QMA601 lid removal handles (delivered with the original analyzer) Replacement handles can be ordered: Michell Part Number: QMA601-SH (QMA601 ONLY) Michell Instruments... -
Page 12: Control Pcb Fuse Replacement
TOOLS/CONSUMABLES QMA Spares Replacement Guide Control PCB Fuse Replacement TOOLS & CONSUMABLES REQUIRED Fuse Michell Part Number: 26790 Pozi screwdriver 2mm hex key Tweezers Latex gloves QMA601 lid removal handles (delivered with the original analyzer) Replacement handles can be ordered: Michell Part Number: QMA601-SH (QMA601 ONLY) 97492 Issue 3, May 2019... -
Page 13: Qma601
Wing nuts Carefully pull the display assembly away from the housing as it is connected by a power cable and a ribbon cable. Disconnect these first and then remove the display. Store the display safely. Michell Instruments... -
Page 14: Removal Of The Qma601 Oven Lid
QMA Spares Replacement Guide QMA601 Removal of the QMA601 Oven Lid Loosen the three nuts on the outside of the oven using a 7/16” spanner/ wrench. Nuts Remove the oven lid by turning the 2 screws anti-clockwise. For QMA601 Oven Assembly Replacement go to Section 4 For QMA601 Moisture Generator Replacement go to Section 5 For QMA601 Crystal Sensor Replacement go to Section 6 97492 Issue 3, May 2019... -
Page 15: Qma601 Oven Replacement
PCB’s when taking out the oven. There will be some resistance when lifting out the oven as there is thermal paste on the base. Clean the thermal paste off the base of the oven and the base of the skid plate. Michell Instruments... -
Page 16: Replacement Of The Qma601 Oven
QMA Spares Replacement Guide QMA601 Replacement of the QMA601 Oven Fit 1mm T-flex (65885) onto to base of the Oven Assembly (83939) before securing it into position on the QMA601 Base Plate (65068). Fit the oven onto the base plate and push down firmly. Secure the oven in place with the 4 screws. -
Page 17: Qma601 Moisture Generator Replacement
Disconnect the 2 nuts that are connected to the 2 Swagelok 1/8” elbows, using a 7/16 spanner/wrench. Use an adjustable or 3/8” spanner/wrench to hold the body of the elbow while disconnecting. Nuts The moisture generator will now be free to lift out. Michell Instruments... -
Page 18: Replacement Of The Qma601 Moisture Generator
QMA Spares Replacement Guide QMA601 Replacement of the QMA601 Moisture Generator Depending which moisture generator you have removed, replace it with the same PPM value: • 0.5PPM – (QMA-SMG-0.5P) • 5 PPM – (QMA-SMG-5P) • 50 PPM – (QMA-SMG-50P) Make sure that the 1/8” elbows on the moisture generator are set to the correct position. -
Page 19: Replacement Of The Qma601 Lid And Pressure Testing
Finally, an internal calibration cycle should be run. Refer to Appendix E for a detailed guide of how to get the best results during calibration. Replacement of the QMA601 Lid and Pressure Testing Go to Section 10 - QMA601 Lid Replacement and Section 11 - Pressure Testing Michell Instruments... -
Page 20: Qma601 Crystal Sensor Replacement
QMA Spares Replacement Guide QMA601 QMA601 CRYSTAL SENSOR REPLACEMENT Removal of the QMA601 Sensor Block and Oscillator PCB Remove the QMA601 lid, display and oven lid as set out in Sections 3.1 and 3.2. Wait for the oven to cool for at least one hour before disconnecting any of the tube work. - Page 21 Remove the 2 Panex receptacle side mounts that are used to hold the lid in place, using a 3mm hex key to remove the screws. Hex screw Disconnect the wiring loom. Lift out the entire base plate from the oven. Michell Instruments...
- Page 22 QMA Spares Replacement Guide QMA601 Undo the 2 screws that hold the sensor housing screen plate in place - this can be done with your fingers. Captive screws Remove the sensor housing screening plate. Be careful not to damage the PCB under the screening plate. Using a 7/16”...
- Page 23 Carefully remove the 2 connectors that are on the oscillator PCB. Do not pull on the wires as this will render the wiring loom unusable. Remove the 4 screws that hold the PCB in place using a long handle pozi screwdriver. The PCB and sensor block can now be removed. Michell Instruments...
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Page 24: Replacement Of The Qma601 Sensor Block
QMA Spares Replacement Guide QMA401 Replacement of the QMA601 Sensor Block Place the new QMA-SSA against the base plate and secure in position with the 4 screws. Fit the 1/16” tube back to the sensor block, tighten the nut- refer to Swagelok instructions in Appendix B. -
Page 25: Qma601 O-Ring Replacement
Carefully turn the lid over. NOTE: Be careful as the lid is heavy. Refit the lid using the QMA601 lid handles, turning the lid clockwise until it is fully fitted to the base. Remove the lid handles. NOTE: There is no need for pressure testing Michell Instruments... -
Page 26: Qma601 Hmi Replacement
QMA Spares Replacement Guide QMA601 QMA601 HMI REPLACEMENT Removal of the QMA601 Lid and HMI Assembly Remove the QMA601 lid and display assembly as set out in Section 3.1. Replacement of the QMA601 HMI Assembly Refit the display assembly by attaching the orange and black cable to Display CN2 and the ribbon cable to Display PL2. -
Page 27: Qma601 Control Pcb & Fuse Replacement
Remove all of the connectors from the control PCB. Using a pozi screwdriver undo the 4 screws until the main PCB mounting plate comes away from the base plate - the mounting plate and the Control PCB should still be attached to each other. Screws Michell Instruments... -
Page 28: Replacement Of The Fuse And Qma601 Control Pcb
QMA Spares Replacement Guide QMA601 Lay the PCB flat and locate the fuse. Fuse Using tweezers remove the old fuse - be careful not to crush it in the tweezers. Replacement of the Fuse and QMA601 Control PCB Using tweezers, carefully place the new fuse in the vacant hole in the control PCB. -
Page 29: Qma601 Lid Replacement
Display CN2 and the ribbon cable to Display PL2. (ribbon cable) (orange and black cable) Place the display assembly onto the display mounts, the correct way up. Display mounts Twist the 1/4 turn wing nuts until the display assembly locks into position. Michell Instruments... - Page 30 QMA Spares Replacement Guide QMA601 Wing nuts Check the QMA601 analyzer lid O-ring for any signs of damage. If the O-ring is undamaged, carefully refit the lid using the QMA601 lid handles, turning the lid clockwise until it is fully fitted to the base. If the O-ring needs replacing, replace with Michell Part QMA601-SORING (see Section 7).
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Page 31: Qma601 Pressure Testing
CONNECTIONS HAVE BEEN DISCONNECTED. If the pressure testing equipment cannot be provided by the customer or service engineer then Michell Instruments’ QMA601-SPTK (Pressure Test Kit) must be used. To complete the pressure test the gas should be attached to the reference and the sample inlets using a 1/8”... -
Page 32: Qma401
QMA Spares Replacement Guide QMA401 QMA401 Sections 12.1 and 12.2 must be completed before replacing the following: QMA401 Oven Assembly QMA401 Moisture Generator QMA401 Crystal Sensor 12.1 Removal of the QMA401 Cover Isolate the gas supply to the QMA401 and depressurize the system. Remove the power lead from the QMA401. -
Page 33: Removal Of The Qma401 Oven Lid
Remove the oven lid by by loosening the 1/4 turn screws, and lift off. Nuts For QMA401 Oven Assembly Replacement go to Section 13 For QMA401 Moisture Generator Replacement go to Section 14 For QMA401 Crystal Sensor Replacement go to Section 15 Michell Instruments... -
Page 34: Qma401 Oven Replacement
QMA Spares Replacement Guide QMA401 QMA401 OVEN REPLACEMENT 13.1 Removal of the QMA401 Oven Remove the QMA401 lid and oven lid as set out in Sections 12.1 and 12.2. Disconnect the wiring loom connectors (three black & two red crimps). Using a pozi screwdriver, remove the 4 screws that hold the oven onto the chassis plate. -
Page 35: Replacement Of The Qma401 Oven
Tighten up the screws to secure the oven in place. Reconnect the wiring looms inside the oven. 13.3 Replacement of the QMA401 Lid and Pressure Testing Go to Section 17 - QMA401 Lid Replacement and Section 18 - Pressure Testing Michell Instruments... -
Page 36: Qma401 Moisture Generator Replacement
QMA Spares Replacement Guide QMA401 QMA401 MOISTURE GENERATOR REPLACEMENT 14.1 Removal of the QMA401 Moisture Generator Remove the QMA401 lid and oven lid as set out in Sections 12.1 and 12.2. Wait for the oven to cool for at least one hour before disconnecting any of the tube work. -
Page 37: Replacement Of The Qma401 Moisture Generator
Blanking plugs If the moisture generator will not go back into its mounting plate, gently loosen the 2 screws using a 3mm hex key. The moisture generator should then fit back in. Tighten the 2 screws. Screws Michell Instruments... -
Page 38: Replacement Of The Qma401 Lid And Pressure Testing
QMA Spares Replacement Guide QMA401 Tighten the nuts back onto the tube work using a 7/16” spanner/wrench - refer to Swagelok instructions in Appendix B. Use an adjustable or 3/8” spanner/wrench to hold the body of the elbow while reconnecting. The moisture generator value must now be programmed into the analyser, and the moisture generator capacity value reset. -
Page 39: Qma401 Crystal Sensor Replacement
Loosen the 3 nuts on the bulkheads on the inside of the oven using a 7/16” spanner/wrench. Nuts Remove the 1/8” tube indicated below by loosening the nuts on either end - hold the tee with a 3/8” spanner/wrench and loosen the nut with a 7/16” spanner/wrench. 1/8” tube Michell Instruments... - Page 40 QMA Spares Replacement Guide QMA401 Using a 3mm hex key, remove the 2 screws that hold the oven base plate in place. Screws Remove the 2 Panex receptacle side mounts that are used to hold the lid in place, using a 3mm hex key to remove the screws. Hex screw Disconnect the wiring loom.
- Page 41 Remove the sensor housing screening plate. Be careful not to damage the PCB under the screening plate. Using a 7/16” spanner/wrench remove the nut (2) that is fitted to the sensor block and the nut (1) that is on the input of the MFC. Michell Instruments...
- Page 42 QMA Spares Replacement Guide QMA401 Remove the complete tube with the pressure transducer. Remove the nut that is on the input of the sensor block using a 5/16” spanner/wrench. Remove the tube from the block. Carefully remove the 2 connectors that are on the oscillator PCB. Do not pull on the wires as this will render the wiring loom unusable.
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Page 43: Replacement Of The Qma401 Sensor Block
Reconnect the 1/8” tubes to the bulkheads and tighten the nuts - refer to Swagelok instructions in Appendix B. 15.3 Replacement of the QMA401 Lid and Pressure Testing Go to Section 17 - QMA401 Lid Replacement and Section 18 - Pressure Testing Michell Instruments... -
Page 44: Qma401 Fuse Replacement
QMA Spares Replacement Guide QMA401 QMA401 FUSE REPLACEMENT 16.1 Removal of the Fuse in the QMA401 Control PCB Remove the QMA401 lid as set out in Section 12.1. Using tweezers remove the old fuse - be careful not to crush it in the tweezers. -
Page 45: Qma401 Oven Lid And Cover Replacement
Replace the oven lid and secure with the 1/4 turn screws. 17.2 Replacement of the QMA401 Cover Re-attach the earthing tag to the top cover. Place the cover back onto the QMA401 chassis. Secure the cover with the 4 screws and tighten. Michell Instruments... -
Page 46: Qma401 Pressure Testing
CONNECTIONS HAVE BEEN DISCONNECTED. If the pressure testing equipment cannot be provided by the customer or service engineer then Michell Instruments’ QMA401-SPTK must be used. To complete the pressure test the gas should be attached to the inlet, via a pressure regulator which has a pressure gauge attached and a 2-way ball valve. -
Page 47: Resetting Moisture Generator / Dryer Remaining Lifetime
Select the “Reset Dryer Capacity” command and press the “Apply” button to reset Dryer Capacity. The moisture generator value (MGV) must be set from the “Service->Calibration Values” screen. The value of the calibrated moisture generator can be found on the certificate. Michell Instruments... -
Page 48: Appendix A Environmental Responsibility
QMA Spares Replacement Guide APPENDIX B Appendix A Environmental Responsibility There is a responsibility, when carrying out operations within this Guide, of avoiding the introduction of substances into the environment, resulting in effects of such a nature as to endanger human health, harm living resources and ecosystems and impair or interfere with amenities and other legitimate uses of the environment. -
Page 49: Appendix B Swagelok Fitting Instructions
Then tighten slightly with the wrench. (Smaller tube sizes will take less tightening to reach the original position, while larger tube sizes will require more tightening. The wall thickness will also have an effect on tightening.) Michell Instruments... -
Page 50: Appendix C F0121 Decontamination Certificate
Has the equipment been cleaned and decontaminated? NOT NECESSARY Michell Instruments will not accept instruments that have been exposed to toxins, radio-activity or bio-hazardous materials. For most applications involving solvents, acidic, basic, flammable or toxic gases a simple purge with dry gas (dew point <-30°C) over 24 hours should be sufficient to decontaminate the unit prior to return. -
Page 51: Appendix D F0131 Hazardous Area Customer Service Declaration
I understand and accept that any departure from, or failure to entirely comply with, the servicing instructions provided by Michell Instruments Ltd. will invalidate any warranty this product would otherwise hold. The work has been carried out by suitably trained & approved personnel and the work undertaken is verified by independent inspection. -
Page 52: Appendix E Field Performance Verification Of Qma401/601
Technical Bulletin Field Performance Verification of QMA401/QMA601 Introduction Two types of measurement verification and adjustment are possible with the QMA series analysers: Calibration using internal moisture source Calibration using external moisture source This document describes the correct procedure to follow for each. - Page 53 4. Enter the ‘Calibrate’ screen, pay attention to the number of ‘settling cycles’ and ‘cal cycles’ 5. If the certified cylinder value is higher than the currently measured value, (which should also be approximately the value of interest), but within 100% of value, then the standard 10 settling/cal Michell Instruments...
- Page 54 QMA Spares Replacement Guide APPENDIX E Date: 25/04/17 cycles will be sufficient. If the certified cylinder value is lower than the currently measured value, pay attention to the table below: Currently measured value − Certified cylinder value Certified cylinder value Recommended Settling &...
- Page 55 QMA Spares Replacement Guide NOTES: Michell Instruments...
- Page 56 http://www.michell.com...
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