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Aeroqual AQM 65 User Manual Download Page 65

 

 

MRK-D-0034 V2.0 

 

 

 Aeroqual AQM 65 User Guide  

 

 

Page | 64 

4.4.7.2 

Check the auto zero calibration flow rate of the Particle Monitor 

The Particle Monitor executes an automatic zero calibration every 720 minutes (12 hours). The auto 
zero process resets a parameter in the modules settings. The value that is changed is the H0 
parameter. 

NOTE:

  The Particle Profiler does not have this feature. 

The auto zero procedure on the Particle Monitor causes the baseline to be adjusted. Negative 
readings on the Particle Monitor are often a result of the auto zero cycle failing to work correctly. 

The zero cycle works by switching off the sample pump and switching on a zero pump. The flow rate 
during the zero cycle is reversed and is a positive flow out through the inlet. The flow rate is 
approximately 0.2 to 0.6 LPM.   

This flow rate does not need to be set to a specific value but it is important that the flow rate is at least 
0.2 LPM positive flow out from the inlet. 

 

Figure 4-17 When measuring the sample flow of the Particle Monitor a vacuum is measured. When 
measuring the zero flow a positive pressure is measured. 

The auto zero can be executed manually by temporarily changing one of the module settings. Once 
the auto zero cycle is complete the setting needs to be returned back to the original setting. 

 

Go to the Diagnostic and Advanced app in Connect software. 

 

Select Module settings from the list on the left column 

 

Locate the Particle Monitor settings, these will be either PM10.0 or PM2.5 

 

Locate the TIMA parameter (it should be 720). 

 

Change this value to 1 by clicking in the cell and typing 1, then save the setting change. 

This will cause the auto zero to start. The flow will change from 2.000 LPM negative flow into the inlet 
to approximately 0.2 to 0.6 positive flow out from the inlet.   

You will need to change the port on the flow meter to measure this flow as shown in Figure 4-16. 

If no flow is measured there may be an issue with the zero cycle or zero pump.  See Appendix 1 for 
trouble shooting. 

 

Measure the positive flow coming out from the inlet and record this in the journal. 

The zero cycle takes approximately 6 minutes to complete.  

 

NOTE:

  Once the flow has been measured the TIMA parameter must be set back to 720 

 

 

 

Summary of Contents for AQM 65

Page 1: ...MRK D 0034 V2 0 Aeroqual AQM 65 User Guide Page 1 ...

Page 2: ...or the first time 23 2 2 1 Wire AC mains power and initial start up 24 2 2 2 Attach PM inlet 25 2 2 3 Attach gas inlet 28 2 2 4 Wire external third party sensors 30 2 3 Set up MOXA G3111 HSPA modem for remote communication 31 2 4 Re packing and transport 32 3 Connect Software 33 3 1 Connecting to the AQM 65 for the first time 34 3 2 Options for connecting to the AQM 65 35 3 2 1 Direct WIFI 36 3 2 ...

Page 3: ...k check a Particle Monitor 61 4 4 6 2 Leak check a Particle Profiler 62 4 4 7 Zero calibration check and flow check of Particle Module 63 4 4 7 1 Check zero baseline of Particle Monitor 63 4 4 7 2 Check the auto zero calibration flow rate of the Particle Monitor 64 4 4 7 3 Check the zero baseline of the Particle Profiler 65 4 4 8 Clean the Particle Monitor TSP inlet particle trap and cyclone 65 4 ...

Page 4: ...6 Perform the zero calibration 102 5 7 6 1 Wait for the module response to stabilise towards zero air 102 5 7 6 2 Decide if a zero offset adjustment is required 103 5 7 6 3 Upload the new offset and check the offset has been applied correctly 103 5 7 7 Perform the span calibration 104 5 7 7 1 Choose your span gas concentration 104 5 7 7 2 Wait for the module response to stabilise towards the span ...

Page 5: ...AQM 65 User Guide Page 4 User Guide Revision History Current version 2 0 Description User guide for AQM 65 Date Revision number Description of change Affected Sections June 2017 2 0 Updated All March 2015 1 0 New User Guide All ...

Page 6: ...nload and print The training website has detailed descriptions of service activities and calibration and installation examples and is updated regularly Video tutorials are featured heavily Go to training aeroqual com Contact technical aeroqual com to receive access The online training website has sections on all the key topics Where possible references to online material will provided throughout t...

Page 7: ...de ozone O3 nitrogen dioxide NO2 carbon monoxide CO sulfur dioxide SO2 PM10 and PM2 5 temperature humidity wind speed and direction Measurement modules can easily be added removed or replaced after the AQM 65 has been installed in the field The AQM 65 is fully weather proof IP 65 and houses a power module thermal management system embedded PC running Aeroqual Connect software and the user selected...

Page 8: ...and creates a zero or baseline measurement and a measurement path which measures the ambient air The final measurement in ppm is an arithmetic combination of the zero and sample measurement Figure 1 2 Gas sensor modules are based on two different designs Each gas module uses a sensor technology that is most suited to its target gas For example the Ozone module uses gas sensitive semiconductor GSS ...

Page 9: ...white ring and a gas exhaust port blue ring Each module contains two 12 V power connectors to allow the module to be connected to a 12 V power bus Each module contain two RJ 45 connections to allow the module to be connected to the RS 485 communications bus and each module contains a status LED Figure 1 4 Gas sensor module with key components labelled ...

Page 10: ...ro Switching none 55 65 0 001 3 of reading 0 001 2 3 years or 0 003 ppm 0 2 SO2 0 10 0 0 001 GSE Medium Zero Switching none 55 65 0 009 3 of reading 0 001 1 2 years or 0 003 ppm 0 2 CO 0 25 0 0 001 GSE Small Direct none 55 65 0 040 3 of reading 0 02 1 2 years or 0 050 ppm 0 2 H2S 0 10 0 001 GSE Medium Zero Switching none 55 65 0 012 3 of reading 0 001 1 2 years or 0 012 ppm 0 6 VOC 0 20 0 001 PID ...

Page 11: ...l used to handle the gas flow Before the gas reaches the sensor all of the tubing material is rigid non reactive PFA After the sample has passed the sensor all of the tubing is flexible R3603 Tygon Figure 1 5 A single pump is used for all gas modules The vacuum port of the pump is connected to the outlet of each gas module The gas modules are connected in two rows inside the AQM 65 enclosure There...

Page 12: ...e seen The pump uses a flow bypass valve to regulate the pressure on the vacuum side of the pump this by pass valve is used to regulate the overall flow through all of the module simultaneously This is discussed in more detail in Section 4 4 3 3 Figure 1 7 The vacuum side of the pump is connected to the exhaust manifold blue rings The AQM 65 inlet is connected to the inlet manifold white rings The...

Page 13: ...or the Particle Monitor and Particle Profiler is separate from the gas sample flow There is a separate pump a separate inlet and a separate exhaust 1 2 1 Particle Monitor modules The Particle Monitor uses a custom Met One near forward scattering nephelometer to measure particle concentration and a sharp cut inlet cyclone to select the particle size This module is shown on the far right in Figure 1...

Page 14: ...tor will have three modules each The size selection is determined by the sharp cut cyclone on the Particle Monitor inlet on the outside of the AQM 65 shown in Figure 1 10 An AQM 65 that has a single Particle Monitor can be configured to measure either of these four size fractions simply by changing the inlet cyclone and making a small change in the software This is described in Section 4 5 of the ...

Page 15: ...or they are held inside Figure 1 11 The Particle Profiler uses three modules a the optical module on the far right b the pump module in the middle c the electronics module on the left 1 2 3 Comparison between the Particle Monitor and the Particle Profiler The Particle Profiler measures particulate concentrations using particle counting it measures multiple size fractions at the same time The Parti...

Page 16: ...sor Some examples of external sensors are shown in Figure 1 12 The AUX module is shown in Figure 1 13 The external sensors which Aeroqual supports include shown left to right in Figure 1 12 MSO weather station from Met One MK427 noise meter from Cirrus WXT536 weather station from Vaisala Windsonic from Gill Instruments LI 200 Pyranometer from Li Cor MetOne MSO weather station Cirrus MK427 noise me...

Page 17: ...mperature irrespective of ambient temperature changes The internal set point temperature is typically 30 0 0 5 o C but this can be changed to better suit the external temperature conditions Section 4 4 12 discusses this in detail The internal temperature is maintained using a fridge compressor for cooling and resistive heaters for warming The AQM 65 has thick insulation foam to minimise heat trans...

Page 18: ... system manager module shown in Figure 1 15 is used to measure the internal temperature and control the compressor and heaters to maintain a constant internal temperature The system manager module also connects to the external temperature RH sensor The system manager module is placed above and to the left of the embedded PC NOTE The switch on the side of the system manager module has no function i...

Page 19: ...ng a browser on their PC tablet or smart phone 1 5 1 Aeroqual Connect Aeroqual connect is the instrument s operating system The AQM 65 is controlled with an embedded PC ePC which is running a webserver The user connects to the AQM 65 using a web browser such as Firefox Chrome or Safari The connection can be over WIFI Ethernet cable or cellular modem Aeroqual connect contains all of the tools neces...

Page 20: ...er Securely back up data in case of local data access issues Maintain service records in the Cloud Journal for auditing and engineer certification There are three versions of Aeroqual Cloud available see www aeroqual com product air monitoring software for details on what is included Aeroqual Cloud Support is a free Cloud version and is used to make technical support fast and efficient for the end...

Page 21: ...nstrument diagnostics and operational parameters are immediately available to Aeroqual engineers through Aeroqual Cloud which Advanced Aeroqual Engineer Certification Certification is available to service technicians employed by an Aeroqual distributor Engineers must demonstrate outstanding technical performance in the setup operation maintenance servicing and calibration of Aeroqual products Engi...

Page 22: ...till hear the internal blower and will be to feel air flow coming from the top See Figure 1 14 Figure 1 21 The fuse holder next to the 12 V rail can be pulled out to turn off the AQM 65 while mains power is attached Remove the protective film before pushing the fuse back in turning the instrument on After the AQM 65 ePC has booted up the AQM 65 will appear as a WIFI network in your list of WIFI ne...

Page 23: ...de to field installation and commissioning is given in Appendix 5 Key points to consider for assembly and first power up The AQM 65 runs on single phase mains AC power 90 305 VAC 47 63 Hz A detailed description of the DC power requirements to assist with solar installations or UPS specifications is given in the Appendix 3 You need to supply a mains power cable and local plug Aeroqual recommends a ...

Page 24: ...ed in additional boxes Examine the Shockwatch label on the side of the shipping box If the indicator is red do not refuse the shipment Make a notification on delivery receipt and inspect for damage If damage is discovered leave item in original packaging and request immediate inspection from carrier within 15 days of delivery date 3 days international Contact Aeroqual of your representative immedi...

Page 25: ...r off position before testing the mains connection Figure 2 3 The 12V DC fuse can be pulled out to turn off the AQM or pushed in to power the AQM 65 When you apply mains AC power and with the 12 DC fuse in the off position you should hear the internal fan blower start up and begin circulating air inside the box Air will come out from the top vent as shown in the image on the right in Figure 2 4 No...

Page 26: ...d light up on the modules when power is applied this confirms the power is being correctly delivered to the modules 2 2 2 Attach PM inlet Online reference training aeroqual com AQM 65 technical training Section 2 4 Online video https vimeo com 119800106 Turn off power to the AQM 65 during this process by pulling out the 12 DC fuse The Particle Monitor and Particle Profiler ship from the factory wi...

Page 27: ...AQM 65 User Guide Page 26 Figure 2 5 Remove the protective tape from the PM inlet Attach an O ring to the aluminium retaining ring and apply a small amount of lubricant Figure 2 6 Add the O ring and a small amount of lubricant ...

Page 28: ...way in to the PM module It is very important to make sure that the aluminium inlet tube is pushed all the way into the optical engine block If the aluminium tube does not fully push down in to the optical engine block then create more length in the aluminium tube by removing the grey retaining nut and then sliding up the rubber grommet on the top of the inlet Replace the nut after you have done th...

Page 29: ...he engine block then connect the heater plug on the inlet to the plug coming from the module Insert the three 6 32 UNC retaining screws to secure the inlet to the aluminium retaining ring Figure 2 10 During field installation secure the PM inlet using the retaining screws and plug in the heater 2 2 3 Attach gas inlet The gas inlet is held by a inch Swagelok compression fitting Attach the inlet and...

Page 30: ...MRK D 0034 V2 0 Aeroqual AQM 65 User Guide Page 29 Figure 2 11 Connect inlet to AQM 65 and measure the flow rate to determine if connection is secure ...

Page 31: ... configuration The correct wiring configuration for each sensor is given in the online training NOTE To check the operation of the third party sensor in your office or laboratory prior to site installation it is not required to feed the cable through the gland Figure 2 12 To connect third party sensors such as weather sensors feed the cable through the gland and wire to the green plug If you are h...

Page 32: ...cell phone store The SIM card fits in a slot underneath the modem as shown in Figure 2 13 You must know the APN of your cellular provider you can find out the APN by going to www APNChanger org and looking up your country and cellular provider Directly connect the MOXA modem to your PC using an Ethernet cable Then enter the APN in to the correct field through the MOXA configuration interface shown...

Page 33: ...The packing crate has supporting bolts and a re enforcing cross brace which should be used to ensure stable packing and to prevent movement during transport and to protect against impact Figure 2 14 The packing create uses retaining bolts which go through the AQM 65 mounting brackets There is an additional supporting brace shown in the top right image which should be used Figure 2 1 Shows the AQM ...

Page 34: ...which is hosted locally on the AQM 65 therefore you will use your internet browser to connect to the AQM 65 All of the instrument control and data analysis and downloading is achieved using apps within the web browser This chapter discusses The different ways to establish a connection to the AQM 65 The apps for instrument control and calibration The apps for data visualisation and data access How ...

Page 35: ...ber of the AQM 65 The WIFI password is Aeroqual You must connect successfully to this WIFI network to achieve connection to the AQM 65 Figure 3 2 In WIFI access point mode the AQM 65 appears as a WIFI network in the lit of WIFI networks on your PC The next step is to open a blank browser window and enter 10 10 0 1 in to the address bar Figure 3 3 The AQM 65 default access login this should be remo...

Page 36: ...FI 2 The ePC has a separate wired Ethernet connection this can used in a number of ways To directly connect to a PC To connect to a wired LAN via a router To connect to an IP modem to provide cellular communication The WIFI connection and Ethernet connection are independent from each other so that both can be used at the same time The recommended configuration for connection is to set the WIFI mod...

Page 37: ...ugged in to the side wall of the AQM 65 as shown in Figure 3 5 Figure 3 5 To establish a direct connection a laptop must be connected to the ePC using an Ethernet cable Figure 3 7 d shows the communications settings for connection using an Ethernet cable Note that the Ethernet mode is set to DCHP server in this method 3 2 3 Connecting over a local area connection LAN The AQM 65 can be added to a L...

Page 38: ...3 6 The MOXA modem uses a SIM card and it must be configured for use with the AQM 65 The Ethernet setting must be set to Auto DHCP client to use the MOXA modem as shown in Figure 3 7c Figure 3 7 The different connection types require different settings in the Configure Instrument app a The Ethernet mode is set to Auto DHCP client In this configuration the MOXA modem can be used The MOXA modem will...

Page 39: ...t mode is set to Auto DHCP client In this configuration the MOXA modem can be used The MOXA modem will assign an IP address to the ePC 192 168 127 10 The WIFI mode is set to Client and is connected the office WIFI network The ePC has been given a WIFI IP address by the router 192 168 0 158 This IP address can be entered directly in the browser to connect to the AQM 65 d The Ethernet mode is set to...

Page 40: ...ill need a USB flash drive 1 Create a file on the flash drive called resetnetwork aqm yes there is a dot at the beginning of the file name The file extension must be aqm it cannot be a aqm txt file In Windows OS you can create a new txt document and give the file name resetnetwork aqm Check the Type column to make sure it is an aqm file You might need to unhide file extensions and delete the txt f...

Page 41: ...n shows the available apps 3 4 1 Manage Data app The Manage Data app is used to view data within the browser and also to download data export for use in other software The available features in the Manage Data app will depend up the instrument licence and the user permission level The features within the Manage Data app appear in a column on the left hand side of the screen Feature Licence require...

Page 42: ...tack of charts 3 4 1 2 Table The data from each module can be viewed on screen in a Table The from and two dates can be selected using a calendar tool and the averaging period such as daily hourly or minute can also be selected Figure 3 11 The table tool in the Manage Data app shows the data in a table with user configured date range and averaging ...

Page 43: ...nloaded by selecting a From and To date and Averaging Period The format is comma separated values csv This file format can easily be opened in Microsoft Excel Figure 3 12 The download data tool in the Manage Data app allows the data to be downloaded at user configured date range and averaging ...

Page 44: ...ual Connect and the Manual Sync upload tool in Aeroqual Cloud NOTE You might need to manual sync multiple times The first time the From Date is 1900 then it creates a file with a maximum number of records of 1 million Therefore the file might only synchronize for a limited dataset At the end of that sync the From Date will show up to where the last data was downloaded You run the sync command agai...

Page 45: ...Mode by clicking the service mode button This will tag the data as service data which can later be filtered when daily or hourly averages are being calculated See Section 4 3 1for further discussion on Service Mode Gain and offset adjustment Gain and offset adjustments are made as part of the AQM 65 gas calibration procedure These adjustments are made in the Service and Calibration App AirCal 8000...

Page 46: ...nal settings of the modules to be viewed or edited Licence required Connect User privilege required Engineer or higher Diagnostics Each module can be selected and real time module operation parameters can be viewed Module settings Each module has a set of operational parameters that control the module These can be viewed or edited using the module settings dialogue These settings should not be cha...

Page 47: ...t Service activities such as filter replacements or flow checks are not automatically recorded by the software Engineers performing service or calibration can make specific user entries to describe their service activities NOTE maintaining accurate and complete Journal entries is a pre requisite of achieving Advanced Engineer status a certification provided by Aeroqual to distributor engineers Kee...

Page 48: ... are three different user permissions which can be applied to individual users on the AQM 65 Administrator Can control access login and password for other users Has full control over all instrument settings Can view and download data An administrator can access all of the apps in Connect and is the only user type who can access the Administration app users are created using the Administration App ...

Page 49: ...tail on each of the service activities can be found on the Aeroqual training website training aeroqual com The training website requires a login please email technical aeroqual com For some of the service activities described a video is also available on vimeo com If a video is available a web link will be provided next to this symbol It is very important to keep service records The Journal is use...

Page 50: ...o understand the terminology and equipment associated with flow rate measurement Aeroqual recommends either the Bios Defender DryCal or the Aeroqual R7 flow meter these can both be used to measure gas flow and Particle Monitor flow Aeroqual measures standard flow the Aeroqual standard conditions are 21 1 o C and 101 3 kPa Figure 4 1 A high quality flow meter is required for gas flow measurement of...

Page 51: ...trol calculating hourly or daily averages or writing air quality reports Figure 4 2 The AQM 65 can be put into Service Mode by clicking the button in the Calibration and Service app This will label the data as Service in the inlet column so the data can be filtered 4 3 2 Journal All service activities should be documented The Journal is accessed by clicking the Journal button next to the username ...

Page 52: ...s important to record the activity in the Journal using a manual user entry See Section 4 3 2 4 4 1 Tools required for regular service and maintenance Service and maintenance of the AQM 65 requires basic tools such as Phillips head screw driver and adjustable spanner and multimeter for checking electrical connections The AQM 65 Service Kit AQM R20 is recommended for maintenance A description of th...

Page 53: ...ncy of service Recommended Monthly depends on local conditions See Section 4 6 for further discussion on filter change frequencies Online reference training aeroqual com AQM 65 technical Training Section 4 1 Online video https vimeo com 119923276 checked Do not turn off the AQM 65 this procedure can be done with the AQM 65 turned on NOTE It is very important to check the AQM 65 inlet flow rate is ...

Page 54: ...d 4 4 3 1 Measure main gas inlet flow rate Remove the white inlet fitting containing the mesh filter and attach the inlet flow adaptor Attach a high quality flow meter such as the Aeroqual R7 or Bios Dry Cal See section 4 2 Record the inlet flow rate in the Journal by making a manual user entry The AQM 65 inlet rate is controlled by the number of gas modules installed Each gas module contributes t...

Page 55: ...using a high quality flow meter such as the Aeroqual R7 or the Bios Dry Cal See Section 4 2 Attach the flow meter to the inlet port of the gas module Reconnect the inlet fitting after measuring each gas module Record the flow rate of each module in the Journal by making a manual user entry Figure 4 6 To measure the individual module flow rates disconnect the gas inlet and attach the module inlet t...

Page 56: ...w to the module inlets and return the flow rate to the expected flow rate Attach a flow meter to the inlet and begin measuring the inlet flow Adjust pump flow adjustment valve until the AQM 65 inlet flow rate has returned to the expected flowrate The valve is shown in Figure 4 7 Figure 4 7 The flow adaptor valve is used to adjust the AQM 65 inlet flow to the correct value If the correct flow rate ...

Page 57: ...tions See Section 4 6 for further discussion on filter change frequencies Online reference training aeroqual com AQM 65 technical Training Section 4 3 Online video https vimeo com 120111907 The filters for the Particle Monitor are located inside the optical module Use a large flat head screw driver to unscrew the filter housing on the front panel of the optical module The filters for the Particle ...

Page 58: ... the correct flow rate through the Particle Monitor or Particle Profiler The flow rate of the Particle Monitor and Particle Profiler are different NOTE The flow rate of the Particle Monitor is 2 0 0 05 LPM The flow rate of the Particle Profiler is 1 0 0 05 LPM Tools required Small Philips head screw driver AQM R7 AQM R56 Parts required None Frequency of service Recommended Monthly See Section 4 6 ...

Page 59: ...when checking the flow of the Particle Profiler When measuring or adjusting the flow rate of the Particle Profiler it is important to use the buffer chamber to ensure accurate measurement The buffer chamber is part of the AQM R56 Zero Filter and Flow assembly It is also part of the R20 Service kit Figure 4 11 shows the buffer chamber installed between the flow meter and the profiler inlet Figure 4...

Page 60: ...haust valves The flow rate of the Particle Monitor must be 2 0 LPM 0 05 between 1 95 and 2 05 LPM Fully close the purge valve by pushing the valve handle towards the module Adjust the exhaust valve until the flow reads 2 2 LPM Adjust the purge valve until the flow reads 2 0 LPM 0 05 The final adjustment can be a little tricky turn the purge valve slowly If it is not possible to reach 2 2 LPM at st...

Page 61: ...the buffer chamber when measuring or adjusting the flow rate of the Particle Profiler Section 4 4 5 1 Figure 4 13 The flow rate of the Particle Profiler is set by adjusting the flow adjustment valve The flow rate of the Particle Profiler is adjusted to 1 0 LPM 0 05 LPM using the flow adjustment valve as shown in Figure 4 13 ...

Page 62: ... 6 Online video None 4 4 6 1 Leak check a Particle Monitor 1 Remove the TSP head and install the R23 vacuum gauge above the sharp cut cyclone 2 Fully close the purge valve and fully open the exhaust valve 3 The vacuum gauge should reach at least 60 kPa 4 Then remove power pull out black and red cable to the electronics module to turn off the pump 5 Count how long it takes for the pressure to chang...

Page 63: ...shown in Figure 4 15 3 Remove the TSP inlet and place the vacuum gauge on the inlet 4 Wait for the vacuum gauge to stabilise 5 Remove black and red power cable from electronics box Figure 4 15 Cap the purge and exhaust lines Place the vacuum gauge on the inlet Disconnect the power observe the change in pressure NOTE The pressure change leak rate should be no more than 10 kPa in 10 seconds ...

Page 64: ...icle Monitor The zero response of the Particle Monitor can be checked by removing the TSP head and placing the R56 adaptor and zero filter assembly on the inlet above the cyclone as shown in Figure 4 16 The Particle Monitor should read between 3 µg m 3 If the zero check shows negative numbers there may be a problem with the auto zero cycle See the troubleshooting section in Appendix 1 Check that t...

Page 65: ...icle Monitor a vacuum is measured When measuring the zero flow a positive pressure is measured The auto zero can be executed manually by temporarily changing one of the module settings Once the auto zero cycle is complete the setting needs to be returned back to the original setting Go to the Diagnostic and Advanced app in Connect software Select Module settings from the list on the left column Lo...

Page 66: ... for further advice 4 4 8 Clean the Particle Monitor TSP inlet particle trap and cyclone The Particle Monitor cyclone uses a small particle trap to remove larger particles The trap needs to be emptied and cleaned for optimum operation of the Particle Monitor If the particle trap overfills then the entire cyclone needs to be cleaned Tools required Can of compressed air Cloth Parts required None Fre...

Page 67: ...an easily be replaced The Particle Monitor contains a sample pump AQM R10 and a purge pump AQM R34 The Particle Profiler only has a sample pump AQM R10 Typically the pumps last between 12 and 18 months However the pumps should be replaced when the correct flow can no longer be maintained Figure 4 19 The Particle Monitor contains two pumps the Particle Profiler has one pump ...

Page 68: ... a flow meter in the configuration shown in Figure 4 20 Tools required Diaphragm pump AQM R10 AQM R7 Parts required Luer cap Frequency of service As required See Section 4 6 Online reference None Online video None A gas module should be leak tight Figure 4 20 A gas module can be checked for leaks by using a diaphragm pump and R7 flow meter If the module is found to have a leak contact Aeroqual tec...

Page 69: ...e Cutter Large Phillips head screw driver AQM R7 Parts required Tubing CS Tube10 CS Tube11 power cable communication cable 2x luer cap Frequency of service As required Online reference training aeroqual com AQM 65 technical Training Section 5 2 Online video Add a module https vimeo com 161433950 Remove a module https vimeo com 161399843 If a module is removed or added then a software change is req...

Page 70: ...You should also remove one communication lead and one power lead After you have completed this task you should have two cables left over and the gas lines should be capped off NOTE When a gas module is removed the overall inlet flow rate will be reduced For example if a CO module is removed then the overall flow rate will be reduced by 0 150 ml per minute 4 4 11 2 Replacing a module with another o...

Page 71: ...for the sample tubing Figure 4 23 Adding a new module requires adding additional sample and exhaust lines Identify the location in the enclosure to install the new module Prepare the tubing by cutting sample and exhaust tubing to a suitable length If required add a tee required if you adding a module between two existing modules Secure the module to the back plate using M4 screws Add one blue comm...

Page 72: ...mperature is set to a default set point temperature of 30o C 30 o C is suitable for most environments For AQM 65s installed in extreme cold or extreme heat the set point can be changed to reduce the power demand placed upon the thermal management system Examples In very cold climates e g Alaska where the external temperature can be 20 to 30 o C the internal temperature can be set to 10 o C Althoug...

Page 73: ...mal control There is a detailed description of the thermal management system in the online training which can assist in troubleshooting problems with the thermal management system Online reference training aeroqual com AQM 65 Technical Training Section 3 3 If you observe a loss of thermal management as shown in Figure 4 24 contact Aeroqual technical support for advice technical aeroqual com Figure...

Page 74: ...nd dust will require more frequent cleaning Figure 4 25 shows how dust and debris can accumulate within the TMS cassette Figure 4 25 Dirt and debris can accumulate within the TMS cassette leading to reduced efficiency of the thermal management system Use a damp cloth to wipe the compressor tank and copper lines Use a small long handled brush to gently clean the condenser fins from top to bottom in...

Page 75: ... off and carefully remove the fan Make a note of the position and orientation of the fan when you remove it Figure 4 27 The cooling can be removed for cleaning Make a note of the orientation of the fan and replace back the fan in the same position Carefully clean the blades of the fan with a damp cloth Replace the fan back in the same position ...

Page 76: ...s be added to a specific PRESSUE not a specific weight so it is very important to use the pressure gauge provided by Aeroqual when re filling the compressor with gas Figure 4 28 The pressure gauge provided by Aeroqual for refilling the compressor with gas You will also need a valve to add to the can or cylinder of gas Aeroqual can provide a charging hose AQM R12 to connect the valve to the pressur...

Page 77: ...e side wall of the TMS module Unplug the temperature sensor and replace it with the plug shown in Figure 4 30 Leave this plugged in during this process Figure 4 30 Replace the internal temperature sensor with the temporary plug shown Unscrew the protection cap and leave in a safe place because you will need to replace it at the end Figure 4 31 Remove the protective cap from the gas inlet Remove th...

Page 78: ...hould PUSH in See the short video Online video https vimeo com 140389555 Figure 4 33 The pressure gauge pushes in to the fitting on the compressor inlet The gauge will respond SLOWLY You should wait 5 minutes for the gauge to stabilise before continuing with the next step Attach one end of the hose to the pressure gauge and the other to the can or cylinder of R134a DO NOT open the valve on the cyl...

Page 79: ...et point 15 17 9 C 6 psi 7 psi 8 psi 18 19 9 C 8 psi 9 psi 10 psi 20 22 9 C 10 psi 11 psi 12 psi 23 24 9 C 12 psi 13 psi 14 psi 25 27 9 C 13 psi 14 psi 15 psi 28 29 9 C 15 psi 16 psi 17 psi 30 32 9 C 16 psi 17 psi 18 psi 33 34 9 C 17 psi 18 psi 19 psi IMPORTANT The pressure variation is only a few PSI It is important to try to achieve the target pressure point The risk of UNDER pressurising is tha...

Page 80: ...inutes and watch the gauge The gauge might slowly come down again as the gas pressure equilibrates in the cooling system If the needle drops below your target pressure then repeat again each time only let in a small amount of gas and WAIT for the gauge needle to stabilise Stabilisation may take several minutes 5 minutes If you overfill by mistake you can release pressure from the valve on the tee ...

Page 81: ... the gas line by pressing the release valve on the gauge Gently detach the valve connection You will lose a very small amount of gas during this process Remember to replace the protection cap after you remove the valve Figure 4 37 Replace the protection cap once you have finished the process ...

Page 82: ...aintenance and some are performed only as required unscheduled maintenance Service intervals will vary depending on site conditions For instance particulate matter levels will impact the frequency of filter changes high PM levels more frequent filter changes It is important to change the filter when it gets dirty Once the local site conditions are understood a filter change schedule can be develop...

Page 83: ...red following PM inlet flow check Clean TMS cassette Section 4 4 12 3 The TMS cassette should be checked and cleaned when required every 3 to 6 months typical PM leak check Section 4 4 6 Every 3 months Quarterly PM zero calibration check Section 4 4 7 1 Every 3 months Quarterly PM zero calibration flow check Section 4 4 7 2 Every 3 months Quarterly PM inlet cleaning Section 4 4 8 Every 3 months Qu...

Page 84: ...distributor status which provides additional marketing and financial benefits to the distributor End users may independently verify the certification by visiting www aeroqual com advancedengineer Aeroqual places high demands and has high confidence in technicians who wish to achieve and maintain advanced engineer status Certification is awarded only after the candidate technician meets the require...

Page 85: ...ent these activities in the service journal Aeroqual Advanced Engineers are also expected to provide training to other technicians within their organisation so that they may eventually become Aeroqual Advanced Engineers 3 On going competence and communication with Aeroqual throughout the year A certified Aeroqual Advanced Engineer must provide evidence that they are continuing to provide good serv...

Page 86: ...2B Tech Ozone generator part number AQM O3CAL When calibrating CO2 gas is delivered directly to the AQM inlet without the use of a calibrator Appendix 4 Aeroqual does not recommend calibration when first commissioning a new AQM 65 We recommend first calibrating 1 3 months after commissioning The quality of the calibration gas makes a big difference to success of a calibration only purchase calibra...

Page 87: ...M 65 Follow all local regulatory calibration requirements if these are defined for the AQM 65 monitoring purpose Plan routine calibrations at an interval that is consistent with the data quality objectives for your monitoring purpose Before gas calibration is considered it is important to first confirm all instrument operational parameters such as flow rates filter cleanliness internal temperature...

Page 88: ...inder CO2 is calibrated by direct injection of zero air from a cylinder and then CO2 from a cylinder via a tee to the AQM 65 inlet See Appendix 4 for details on CO2 calibration 5 2 1 Purchasing calibration gas recommended cylinder concentrations and sizes Calibration gas should be purchased from a reputable calibration gas supplier there are several such suppliers worldwide Aeroqual recommends Cal...

Page 89: ...2 Balance Air 6D 103 litres C10 fitting A0189932 Table 5 1 Recommended calibration cylinder concentrations The recommended concentration is written in bold the minimum and maximum recommend concentration are written in green in the table 5 2 2 Cylinder of certified zero air and certified CO2 for CO2 calibration CO2 cannot be calibrated using the Aeroqual calibration systems a cylinder of certified...

Page 90: ... and medium laboratory gas cylinder Both can used with the AirCal 1000 or AirCal 8000 On the right hand side are small size cylinders from Linde and Calgaz These are more convenient and easy to transport Figure 5 2 See the Aeroqual online training on connecting your gas regulator to your cylinder ...

Page 91: ...Always make sure the exit pressure of the regulator does exceed the maximum pressure of the gas lines you are using Always use appropriate safety equipment such safety glasses when handling calibration equipment Gas toxicity consideration Some of the gases used during calibration may represent a toxicity risk and all gases represent an asphyxiation risk Always make sure the exhaust gas is well ven...

Page 92: ...AirCal 1000 These are optional and can be shipped along with the AirCal The AirCal 1000 has an internal integrated zero air generator for zero calibration The AirCal 1000 cannot be used to zero or span calibrate CO2 See Appendix 4 The AirCal 1000 can be used to zero calibrate Ozone but not for Ozone span calibration For Ozone span calibration Aeroqual recommends the 2B Technologies Model 306 Ozone...

Page 93: ...eed for a calibration engineer to visit the AQM 65 Figure 5 5 left shows two gas cylinders Calgaz in the cylinder housing on the outside gas enclosure of the AQM 65 Figure 5 5 right shows the calibration module which sits inside the AQM 65 enclosure AirCal 8000 comes with two Aeroqual regulators AIC GASREG01 and all of the tubing and fittings required The AirCal8000 does not include calibration ga...

Page 94: ...are also a 1 8 Swagelok compression fitting The maximum inlet pressure in 50 PSI The AQM 65 gas inlet fitting is a Swagelok compression fitting shown in Figure 5 6 The Aeroqual AQM 65 CALKIT shown in Figure 5 6 is used to connect the outlet of the AirCal 1000 and Ozone generator to the inlet of the AQM 65 5 6 1 Inert fluoropolymer tubing for module calibration The tubing which connects the outlet ...

Page 95: ... 94 Figure 5 7 The Aeroqual gas regulator is fitted with a 1 8 inch Swagelok compression fitting Additional tubing for calibration can be purchased from Aeroqual 1 8 OD tube Aeroqual part number CS Tube 27 and 1 4 OD Tube Aeroqual part number AS R66 ...

Page 96: ... from a newly positioned generator for example Also check for new obstructions which affect the measurements such as a newly constructed fence for example Record anything noteworthy about the surroundings in the journal Inspect the instrument especially the gas inlet particle inlet and door handles to make sure nothing has been tampered with Record anything noteworthy about the instrument in the j...

Page 97: ...operating temperature and changing the gas inlet filter 2 Setting up the calibration equipment 3 Performing a zero calibration on all gas sensors at the same time 4 Then performing a span calibration module by module 5 Documenting all stages of the process in the instrument journal 6 Final checks before leaving site and scheduling the next calibration Figure 5 8 Flow schematic for calibration ...

Page 98: ...em Before you open the door check the flow rate at the AQM 65 gas inlet and record the flow rate you measured in the journal If the flow rate is outside of the expected range then you must find the cause See 4 4 3 1 for a discussion on troubleshooting flow rates If the flow rate is within the expected range then open the door and replace the gas inlet filter with a new filter and then close the do...

Page 99: ...e AirCal 1000 Figure 5 9 Setup to perform zero calibration with AirCal 1000 The outlet of the AirCal 1000 is connected to the inlet of the AQM 65 using the tee fitting at the end of the AQM 65 CALKIT The tee is open to allow excess flow out from the tee The AirCal 1000 can be controlled using desktop software and a USB cable or using the button on the front panel The AQM 65 calibration Connect or ...

Page 100: ...nected to the inlet of the AQM 65 using the tee fitting at the end of the AQM 65 CalKit The tee is open to allow excess flow out from the tee Calibration gas cylinders are connected to the back of the AirCal 1000 The AirCal 1000 can be controlled using desktop software and a USB cable or using the buttons on the front panel The AQM 65 calibration Connect or Cloud is used to change offset and gain ...

Page 101: ...and then delivered directly to the AQM 65 Aeroqual recommends the Model 306 Ozone Calibration Source shown in Figure 5 3 This can be purchased directly from Aeroqual with part number AQM O3CAL Figure 5 11 Setup to perform span calibration with Ozone calibrator The outlet of the Ozone calibrator is connected to the inlet of the AQM 65 using the tee fitting at the end of the AQM 65 CALKITt The tee i...

Page 102: ...form a zero and span calibration using the AirCal 8000 The regulator valve on the gas cylinders must be open When you are delivering zero or span gas you should measure excess flow out from the tee The AirCal 8000 is controlled using the Connect Cloud software The AQM 65 calibration Connect or Cloud is used to change offset and gain ...

Page 103: ... the gas modules have stabilised before deciding if any offset changes are necessary Figure 5 13 shows the calibration and service real time readings The average and standard deviation readings over a ten minute period are highlighted in green in the bottom of the table Note that the bottom row is added here for demonstration this is not reported in the software Figure 5 13 Stability is determined...

Page 104: ... Service Screen shown in Figure 5 14 5 7 6 3 Upload the new offset and check the offset has been applied correctly The new calculated offset is uploaded by clicking in the appropriate cell and changing the valve then saving It might take several minutes for the offset to be applied Figure 5 14 Apply the new offset by changing the value in the offset cell NOTE All offset and gain adjustments are re...

Page 105: ... choosing a span gas concentration are A span gas concentration can be chosen which best represents the concentrations expected at the measuring site A span gas concentration can be chosen which is at 80 of the full measurement range of the module This is an approach specified by some manufactures and is written in to the standard operating procedures of some municipal monitoring networks based on...

Page 106: ...last ten measurements this is given in the calibration and service app Stability is defined as a percentage of the span concentration so a calculation must be performed to determine the stability as a percentage Figure 5 15 Response of the CO module towards 10 00 ppm CO In the example given in Figure 5 15 the CO sensor module is being calibrated at a span point of 10 00 ppm CO After 30 minutes the...

Page 107: ...its then a new gain is required 5 7 7 4 Calculate a new gain and decide if the gain should be applied The formula for calculating a new gain is New Gain Current Gain Span gas concentration Module reading To calculate the new gain you will need to know the Span gas concentration Current Gain Module reading and then use the equation to calculate the new gain These values can all be found in the Cali...

Page 108: ... the equipment used and the gas cylinders can be recorded in the journal manually Figure 5 17 is an example of a journal entry for an AQM 65 gas calibration Figure 5 17 Use the journal to record details about the calibration that are not automatically captured by the instrument software 5 7 9 Pack up and final instrument checks schedule the next calibration Pack up the calibration gear Lock the AQ...

Page 109: ...ents 6 2 Field Calibration In order to perform a field calibration your Aeroqual instrument must be located at the same site as a Reference PM instrument This is called Co location and is widely performed in ambient air quality monitoring to assess the performance of a new instrument The two instruments are operated for a given period of time and their data are compared An adjustment factor called...

Page 110: ...n be used to establish variance between Aeroqual and a known instrument This method can be used to assess new versus old instrumentation but is not a calibration to a reference instrument High Volume samplers Not recommended due to documented variance between these and other methods and potential for filter contamination 6 3 Steps to perform a K factor correction Beta Attenuation Monitors BAM meas...

Page 111: ...as below The graph to the left below shows the time series of the two instruments The graph to the right below shows the slope calculation In this example the Dust Sentry is reading higher than the reference instrument The slope of the curve Reference vs Dust Monitor is 0 6568 So a gain of 0 6568 needs to be applied to the instrument The Aeroqual instrument will need a new gain calculated using th...

Page 112: ... Connect and Cloud software will report two different types of error condition in the banner at the top of the page these are sensor offline and sensor failed The error will also be listed in the AQM 65 journal Sensor offline A sensor offline error is usually caused by either a loose power connection or a loose communications connection Check the module connections are secure If the power connecti...

Page 113: ...set procedure See Section 3 3 2 Error 500 Database error An error is known to occur with the internal database which causes the following error report when trying to connect to the AQM 65 The may be able to be resolved over a remote connection Or a component in the embedded PC will need to be replaced If this error occurs contact Aeroqual technical support technical aeroqual com Internal temperatu...

Page 114: ...lace scrubber Contact technical aeroqual com NO2 NOx Incorrect gain or offset applied Check the correct gain has been applied correctly Incorrect calibration performed Incorrect gas cylinder used or gain calculated incorrectly Redo calibration or identify error and correct it Particle Monitor and Particle Profiler troubleshooting PM 2 5 PM 10 Cyclones fitted on the wrong side Swap cyclones to corr...

Page 115: ...MRK D 0034 V2 0 Aeroqual AQM 65 User Guide Page 114 Appendix 2 AQM 65 dimensions and weight The weight of the AQM 65 is approximately 40 kg 90 lbs See Appendix 5 for mounting guidelines ...

Page 116: ...e but can occur regularly Cooling requires more power than heating therefore the power demands can be greater in hot climates than in cooler climates The modules demand power but also generate heat in the AQM so counterintuitively AQMs with more modules may not significantly increase the overall power demand Here is a general guide describing the power demands for AQMs of different module configur...

Page 117: ... 9 45 127 211 PID 1 56 1 56 50 139 216 AUX YES 0 7 0 7 52 5 149 224 AirCal 8000 15 25 Total module power W 48 9 70 6 To use the calculator type YES in the cell next to the module installed in your AQM 65 All AQM 65s will have the Embedded PC Sample Pump and System manager We recommend to include the Moxa modem the other modules are optional and will be unique to your AQM 65 Then you can read the a...

Page 118: ... are suitable fixed flow or demand flow Fixed or adjustable flow regulator for CO2 zero and span calibration A fixed flow regulator delivers gas at a fixed flow The flow rate must be selected at the time of purchase Aeroqual recommends the 715 series fixed flow meters from calgaz com the 715 series fits on to the zero grade air and CO2 span gas cylinders You must purchase a flow meter which has ou...

Page 119: ...K D 0034 V2 0 Aeroqual AQM 65 User Guide Page 118 Figure 7 1 Calibration setup for calibrating CO2 Figure 7 2 Left Closed tee used with demand flow regulator Right Open tee used with fixed flow regulator ...

Page 120: ...thing nearby which could change and affect your project like trees planned buildings or new roads and other potential interferences Both Mains and Solar power can be used but these will need to be available and installed before the instrument arrives When installing power outlets 110 VAC to 230 VAC for the AQM 65 they should be weatherproof and installed safely Install 2 power outlets 1 for the AQ...

Page 121: ...ounted to the top of the pole Figure 2 It is very important to maintain good air flow underneath the AQM 65 The temperature and relative humidity sensor is placed on the bottom plate right The AQM 65 should be mounted on an open bottom stand so that air can flow underneath the AQM 65 the cooling fan at the back left must also be unobstructed ...

Page 122: ...ure 4 A stand with close base prevents air flow around the temperature and relative humidity sensor the cooling fan at the back must be given clearance to prevent overheating of the compressor A stand with a closed base will prevent air flow and will also block the temperature and humidity sensor which will lead to higher uncertainty in those measurements The AQM has a cooling fan at the back on t...

Page 123: ...al AQM 65 User Guide Page 122 Design concept for AQM 65 stand with extended pole for mounting metrology sensor Figure 5 A stand with an open base allows air flow around the Temp RH sensor The stand is held on a concrete base ...

Page 124: ...perature Check that the ITemp stabilises at the set point Write a comment in the Journal that commissioning is complete Exit Service mode NOTE It can take many hours up to one day for the AQM 65 to fully warm up and provide stable readings During this time the readings can be negative or outside of what is expected Complete the Commissioning report and provide to customer This report details the s...

Page 125: ...O gas for NO2 sensor calibrations The AirCal 1000 does not have this facility If you plan to use a calibrator with GPT capability you should only use a small excess of O3 0 025 ppm because excessive O3 may adversely affect the NO2 calibration Alternatively use an excess of NO to enable a NOx calibration simultaneously For example a setting of 0 2 NO and 0 1 O3 would produce 0 1 ppm NO2 and 0 2 ppm...

Page 126: ...125 Figure 7 3 Left Ecotech and Teledyne calibration system Top Right Drying agent molecular Sieves Bottom right Aeroqual R41 humidifier Figure 7 4 The Aeroqual R41 humidifier is placed between the outlet of the calibrator and the inlet of the AQM 65 ...

Page 127: ...er nearest to you 9 Compliance 1 The Aeroqual AQM 65 Monitor complies with EN 61000 6 1 2001 2 The Aeroqual AQM 65 Monitor complies with EN 61000 6 3 2001 3 The Aeroqual AQM 65 Monitor complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 these devices may not cause harmful interference and 2 these devices must accept any interference received including inte...

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