Aeroqual Dust Sentry User Manual
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Aeroqual Dust Sentry User Manual

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Dust Sentry &
AQS 1
User Guide

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Summary of Contents for Aeroqual Dust Sentry

  • Page 1 Dust Sentry & AQS 1 User Guide...
  • Page 2 Alternative sources of information and help In addition to this user guide, Aeroqual of f ers other sources of inf ormation which can assist in the operation of the monitors. The Aeroqual website contains brochures, technical notes , f requently asked questions, and user guides.

  • Page 3: Table Of Contents

    Saf ety ......................... 20 Surveyor’s tripod mounting ................... 20 Connectivity......................... 23 Aeroqual Connect (via Direct WIFI / LAN) ..............23 Aeroqual Cloud (via Network WIFI / Modem) ..............24 Communication settings ....................28 Resetting the communication settings back to f actory settings ........29 Sof tware..........................
  • Page 4 Particulate Module Calibration ..................79 Troubleshooting ........................81 Copyright..........................83 10 Compliance ......................... 83 11 Warranty ..........................83 12 Appendix ..........................84 12.1 Mains wiring color guide ....................84 12.2 Calibration Records...................... 85 Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 5: Introduction

    1 Introduction 1.1 Overview The Dust Sentry and AQS 1 (ref erred to herein as a ‘monitor’) are f lexible air quality monitoring systems that can be conf igured to target specif ic applications of interest in industrial, urban environment and regulatory applications.

  • Page 6: Particulate Measurement Options

    1.2 Particulate Measurement Options An Aeroqual Dust Sentry or AQS 1 can be equipped with several dif ferent options f or measuring particulate matter including a Nephelometer, a Prof iler, or a PCX module. 1.2.1 Particle Nephelometer Module The Aeroqual Particle Nephelometer Module combines a laser nephelometer with a high-precision sharp cut cyclone.

  • Page 7: Gas Modules

    • • • Note: Gas module are only available in an Aeroqual AQS, however Dust Sentry and Dust Sentry Pro can be upgraded to work with gas modules. 1.4 Optional external sensors The monitors can integrate several external sensors such as weather sensors, solar radiation, and noise sensors.

  • Page 8: Dimensions

    These dimensions are f or a visual representation only, f or f ull details see Section 1.6 Specif ications. Dimensions f or DS, or AQS1 with Nephelometer Module: Dimensions f or DS Pro or AQS1 with Profiler Module: Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 9: Specifications

    SCAQMD Rule 1466 Pre-approved Pre-approved Auto zero check Auto flow control Sample flow 2 LPM 1 LPM 1 LPM Recommended factory calibration 24 months 12 months 12 months interval Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 10 Volatile Organic Compounds High 0 - 30 ppm (0.01 ppm) Hydrogen Sulfide 0-10,000 ppb (0.1 ppb) Sulfur Dioxide 0-10,000 ppb (0.1 ppb) Methane 0-100 ppm (0.01 ppm) Gas calibration interval As required Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 11: Quick Setup Guide

     Send any questions about things you are unsure about to technical@aeroqual.com 7. Write a checklist  Write your own checklist to ensure a smooth installation and setup.  Include any reporting requirements that will be required. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 12 All monitors are supplied with a traceable f actory calibration. This calibration is applicable to the commissioning phase and accordingly Aeroqual does not recommend an initial calibration as part of monitor commissioning.

  • Page 13: Pre-Planning

    Conf igure modem (where supplied) Aeroqual recommends these steps be perf ormed in an of f ice or laboratory as part of a qual ity control check of the monitor to make sure the monitor has arrived undamaged and the f low system, electrical system and communication system are working as expected.

  • Page 14: Assembly

    2. Feed the power cable through the nut gland plugs and connector and wire the cable to terminal block according to the diagram. Note: A wiring color guide is in Section 12.1 Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 15: Powering On/Off

    COM port (indicated below). third party sensors need to be conf igured through Aeroqual Connect or Cloud – see Section 2.7.2. Aeroqual Dust Sentry and AQS User Guide...
  • Page 16 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. Gill Instruments MetOne MSO Vaisala WXT536 Airmar 200WX Windsonic Weather Station Weather Station Weather Station Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 17 External Sensors. Click the Save button at the bottom of the page to save the conf iguration. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 18 The AUX module uses a 12-way green connector to connect to the external sensor. When you are happy with the wiring then apply power and log on to the Aeroqual Connect sof tware as described in Section 4.1 Aeroqual Connect (via Direct WIFI / LAN).

  • Page 19: Mounting And Site Positioning Guidelines

    For pole mounting: Secure top mounting bracket at a suitable height using the U-bolts or metal bands provided Fix lower mounting bracket to the Dust Sentry chassis with screws Hang the monitor on the top mounting bracket Place U-bolt or metal band through lower mounting bracket Secure bottom mounting bracket using the U-bolts or metal bands provided NOTE: Only one U-bolt or metal band is required to secure the bottom bracket.

  • Page 20: Inlet Height

    3.5 Surveyor’s tripod mounting If needed, Aeroqual can supply a mounting kit that attaches the AQS 1, Dust Sentry or Dust Sentry Pro to a standard surveyor’s tripod. The kit includes one mounting plate, 8 x M4 hex head bolts and nuts, and 6 pegs.
  • Page 21 If the supplied pegs aren't suitable f or the ground type, you might need to f ind another way to secure the legs. For extra security, attach guy wires to the f our holes in the corners of the mounting plate. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 22 Check the tripod attachment screw is f irmly tightened and that the monitor is centered on the tripod. Figure 3-4 The monitor should be centered and level on the tripod Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 23: Connectivity

    There are two ways to connect to your monitors: Aeroqual Connect (via Direct WIFI / LAN) f or initial set up and when access to the internet is limited. Aeroqual Cloud (via Network WIFI / Modem) f or remote access, visibility of all your monitors, and remote technical support f rom Aeroqual.

  • Page 24: Aeroqual Cloud (Via Network Wifi / Modem)

    WIFI connection. Af ter logging in to Aeroqual Connect, you will be presented with a screen with f ive ‘apps’; Manage Data, Calibration and Service, Conf igure Instrument, Diagnostics and Advanced, and Administration. You are now accessing your monitor in “Access Point”...
  • Page 25 If your laptop also has access to the same LAN, then this IP address can be typed into a browser address bar and a connection to the monitor can be established over the LAN connection. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 26 SIM card to be the Primary SIM card. Some conf iguration f unctionality usef ul in an Aeroqual monitor is detailed below; however, f or a f ull list of conf iguration options, please consult the modem manuf acturer’s documentation available at: Sierra Wireless: https://www.sierrawireless.com/...
  • Page 27 The recommended conf iguration f or connect ion is to set the WIFI mode to Access Point and the wired Ethernet to Client mode to use with the modem. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 28: Communication Settings

    Ethernet cable. Enter 10.10.0.1 to connect directly to the monitors. NOTE: Should you need to reset the communication settings, see the following section, Section 4.4. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 29: Resetting The Communication Settings Back To Factory Settings

    The WIFI settings can be set back to Access Point mode and the monitor will again appear as a WIFI network. Depending on the version of Aeroqual Connect you are using, the SSID name will appear as the monitor “serial number” or as “Aeroqual AQM”, the reset WIFI password will be “Aeroqual”.

  • Page 30: Software

    The data f rom each module can be viewed on screen in a Table. The f rom and to dates can be selected using a calendar tool, and the averaging period such as daily, hourly or minute can also be selected. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 31 PC to Aeroqual Cloud. This f eature is used if the Monitor does not have an active data connection to Aeroqual Cloud at the monitoring site, but the data is required to be in Aeroqual Cloud f or data storage and so all stakeholders can access the data.

  • Page 32: Calibration And Service

    The Conf igure Instrument page provides usef ul inf ormation about the monitor, including: • The list of conf igured licences. • When data was last sent to the Aeroqual cloud database. • The number of text alerts remaining. NOTE: These come from cloud.aeroqual.com not from the monitor.
  • Page 33 The Diagnostics and Advanced Page provides access to monitor and individual module operating parameters and is used by Aeroqual technical support to troubleshoot and diagnose monitor condition. It provides real time inf ormation about the status of the modules and allows operational settings of the modules to be viewed or edited.

  • Page 34: Administration

    The Connect sof tware has some f eatures which may need to be enabled through a licence, such as the application programming interf ace (API) f eature and the FTP export f eature. For inf ormation about Connect f eatures which require a licence, contact the Aeroqual distributor in your local country f or technical support.

  • Page 35: Setup, Service, And Maintenance

    Recommended service f requencies f or each service activity are given in Section 6.1.1. Further detail on each of the service activities can be f ound on the Aeroqual training website: https://support.aeroqual.com It is very important to keep service records.
  • Page 36 For PM f low rate measurements, a 0.2 - 2.5 L/min rotameter is suitable, or the f low meters noted above. A rotameter is included in the Dust Sentry service kit (DS R20), but not the AQS service kit (AQS R20).
  • Page 37 • Rotameter f or PM f low DS R8 (included in the Dust Sentry service kit DS R20x) • Vacuum gauge R23x (Included in both Dust Sentry and AQS R20x Service Kits, also available separately) •...

  • Page 38: Particle Monitor And Particle Prof Iler Modules

    If not already f itted, attach a PM inlet O-ring to the aluminium retaining ring and apply a small amount of lubricant. Figure 6-6 Add the O-ring and a small amount of lubricant. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 39 Replace the nut af ter you have done this . Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 40 Use fresh Tygon Tube (CS Tube 10) when re-connecting the tube back on the pump. This is because the barbs on the pump stretch the tube. The online training website contains details on how to replace the gas sample pump. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 41 Service Interval Recommended Monthly. (See Section 6.1.1) 1. Enter ‘Service Mode’ in Aeroqual Connect to ensure that any f luctuations in the data caused f rom this activity can be excluded f rom air quality reports. 2. Connect f low adapter to sample inlet by removing the TSP head and pressing the f low adapter onto the top of the cyclone.
  • Page 42 Figure 6-13 The flow rate of the Particle Nephelometer is set by adjusting the sample flow adjustment valve. Note: If your Particle Nephelometer Pump Module appears different than above you may have an older version. If so, please consult support.aeroqual.com for instructions on how to adjust the flow on this type of module.
  • Page 43 Service Interval Recommended Monthly. 1. Enter ‘Service Mode’ in Aeroqual Connect to ensure that any f luctuations in the data caused f rom this activity can be excluded f rom air quality reports. 2. Connect f low adapter to sample inlet by removing the TSP head and pressing the f low adapter onto the top of the inlet.
  • Page 44 Figure 6-16 The flow rate of the Particle Nephelometer is set by adjusting the purge and exhaust valves. Note: If your Particle Profiler Pump Module appears different than above you may have an older version. If so, please consult support.aeroqual.com for instructions on how to adjust the flow on this type of module.
  • Page 45 Check all the tube connections. NOTE: The pressure change (leak rate) should be no more than 10 kPa in 10 seconds. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 46 Particle Nephelometer. Tools required R56, and DS R8 or AQS R8 HS Parts required None Service interval Recommended Monthly. (See Section 6.1.1) Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 47 The f ilters f or the Particle Prof iler are in a f ilter casing outside the optical module and within the Particle Prof iler Pump Module. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 48 Prof iler. However, if the f ilters look visibly blackened, they should be replaced, regardless of the time elapsed. Figure 6-21 The AQS R31 sample filter should be replaced once the filter begins to blacken . Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 49 Measure the positive f low coming out f rom the inlet and record this in the journal. The zero cycle takes approximately 6 minutes to complet e. NOTE: Once the flow has been measured the TIMA parameter must be set back to 720. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 50 Typically, the pumps last between 12 and 18 months. However, the pumps should be replaced when the correct f low can no longer be maintained. Figure 6-24 The Particle Nephelometer contains two pumps, the Particle Profiler has one pump. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 51: Pcx Modules

    6. Insert the PM inlet into the Swagelok f itting and caref ully tighten. Thread tape is NOT required. Figure 6-25 Add the O-rings to the PCX inlet using a small amount of lubricant. Press the TSP inlet on after. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 52 To view the Cumulative PM through the device, Click on the ‘Diagnostics and Advanced’ page, and select the ‘Diagnostics’ tab. The f if th column shows how much PM has passed through the device in mg/m Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 53 The PCX module has a f actory integrated f low sensor will automatically check and maintain the f low rate of the module. The current reading can be seen in Aeroqual Cloud by navigating to the monitor’s page and going to the ‘Diagnostics and Advanced’ page, f ollowed by the ‘Diagnostics’ tab, and selecting the ‘Flow’...
  • Page 54 Section 6.3.4 the module will f unction correctly. If this f low rate is not achievable, please contact Aeroqual or your local distributor f o r servicing. Aeroqual Dust Sentry and AQS User Guide...
  • Page 55 Check that the gain and of f set values f or the PCX (stored in the Calibration and Service page → Calibration tab of Aeroqual Cloud) are set to sensible settings. The gain should be between about 0.6 and 4.0. The of f set should be 0.000.
  • Page 56 • Measure the positive f low coming out f rom the inlet and record this in the journal. • The zero cycle takes approximately 10 minutes to complete. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 57 Re-assembly f ollows the same process in the opposite direction. However, the screws should each be tightened gradually in a circle in order to ensure they all thread in properly. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 58 Swagelok f itting. To remove a PCX module: 1. Enter ‘Service Mode’ in Aeroqual Connect to ensure that any f luctuations in the data caused f rom this activity can be excluded f rom air quality reports.
  • Page 59 To re-install a PCX module, repeat the above steps in the opposite direction and then complete a leak check as described in Section 6.3.5. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 60 6.3.9 Troubleshooting PCX Specific Error States The PCX module can provide more detailed error states than previous Aeroqual modules. The table below summarizes which error states the module may present, the possible cause, and the recommend action the user should take.
  • Page 61 PCX Error Lights The PCX module contains two LED which can indicate module status. The main LED, which is present on all Aeroqual modules, and a secondary LED which can indicate additional states unique to the PCX module. Figure 6-37 LED status lights on the PCX module...

  • Page 62: Gas Modules

    It is recommended that the monitor engineer, over time, develops an appropriate servicing schedule f or a site. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 63 Figure 6-40 The particle filter on the gas inlet can be easily replaced, it should be replaced when it gets dirty as shown in the image on the right (a new filter is shown on the left, dirty filter on the right). Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 64 When the monitor is new, the inlet f low rate is recorded in the monitor logbook which is provided f rom the Aeroqual f actory. The measured f low rate should be equal to the previously measured f low rate which is recorded in the monitor journal.
  • Page 65 Figure 6-43 A gas module can be checked for leaks by using a diaphragm pump and R7 flow meter NOTE: If the module is found to have a leak, contact the Aeroqual distributor in your local country for technical support.
  • Page 66 Aeroqual Connect – Test 001 (Test 001) Normal Operation AQS 10052017-591 Aeroqual AQS 1 - Test PM2.5 PM10 RAIN Figure 6-44 Change the module configuration in the software in the Configure Instrument page. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 67 It important to use the large barb tee f or the exhaust tubing and the small barb tee f or the sample tubing. Figure 6-45 Adding a new module requires adding additional sample and exhaust lines. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 68: Scheduled Maintenance

    As required f ollowing module f low check module source not found. Add, remove, replace 6.4.6 As required gas module Table 6-1 Service frequency guidelines for various service activities. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 69: Calibration

    This is captured by the f actory calibration certif icate. Experience shows that Aeroqual’s f actory calibration transf ers well to the f ield, meaning that f ield calibration is not required during initial set up.
  • Page 70 Calgaz: www.calgaz.com. Calibration gas is purchased at high concentrations, in a balance of air or nitrogen and then diluted to a lower concentration using a gas dilution calibrator such as the Aeroqual AirCal1000. Other gas dilution systems can also be used.
  • Page 71 Table 7-1 Recommended gas cylinder concentrations. A two-stage pressure regulator is required f or use with these gas cylinders. Aeroqual can supply the regulator (Part Number AIC GASREG01) f or use with C10 f itting. The Aeroqual regulator is shown attached to the Calgaz cylinder in Figure7-1.
  • Page 72 Assurance Handbook is a good example of how prescriptive calibration requirements f or such applications can be. Aeroqual makes the f ollowing recommendations about calibration f requency f or the monitor: • Follow all local regulatory calibration requirements if these are def ined f or the monitoring activity.
  • Page 73 0.1 ppm. The Calibration screen in the Calibration and Service Page in the Aeroqual sof tware is where you will perf orm the calibration and change any monitor settings.
  • Page 74 Check that the particle inlet is secure, if yes pass 5.4. Check that door locks are operational, if yes pass 5.5. Measure and record the gas inlet f low rate Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 75 If no specif ic module is causing a problem and all module f low rates are low, then go to 6.4 otherwise go to 6.6. • Adjust the f low rate using the bypass valve, circle yes if valve adjusted Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 76 • If the required of fset is outside the recommend limits listed in Table 7 do not upload the offset, write fail in column 7.2.7. Move on to next module and go back to Step 7.2.1. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 77 Conf irm the readings are within acceptable limits. • If yes then write pass in column 8.1.10, if not then write fail. Move on to next module and go to Step 8.1.1. Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 78 Figure 7-5. 8.10. Deliver ozone f rom the ozone calibrator at your chosen span point, Aeroqual recommends 0.1 ppm, make sure the tee is closed using the cap as shown in Figure 7-5.

  • Page 79: Particulate Module Calibration

    7.2.2 Field calibration by co-location In order to perf orm a f ield calibration, your Aeroqual monitor must be located at the same site as a Reference PM monitor. This is called ‘Co-location’ and is widely perf ormed in ambient air quality monitoring to assess the perf ormance of a new monitor.
  • Page 80 The slope of the curve Ref erence vs Dust Monitor is 0.6568. So, a gain of 0.6568 needs to be applied to the monitor. The Aeroqual monitor will need a new gain, calculated using the f ormula below: ������ �������� = ������ �������� �� �� ������������...

  • Page 81: Troubleshooting

    Table 8-1 Not all known issues are listed in Table 8-1 especially if not known to Aeroqual when this user guide was written. The Aeroqual training website provides a comprehensive and up to date list of known issues and provides solutions as soon as solutions become available.
  • Page 82 If this error occurs contact the Aeroqual distributor in your local country f or technical support. Fault Isolation / Symptom Possible Cause Reference Solution Gas module Troubleshooting Flow leak or incorrect Section 6.4.3 f low Negative readings Dirty inlet gas f ilter Change f ilter Section 6.3.3...

  • Page 83: Copyright

    Copyright Aeroqual Limited. All rights reserved. Reproduction, transf er, distribution or storage of part or all of the contents of this document in any f orm without the prior written permission of Aeroqual Limited is prohibited. “Aeroqual” is a registered trademark of Aeroqual Limited. Other product and company names mentioned herein may also be trademarks or trade names.

  • Page 84: Appendix

    Live / Phase Black or Red Brown or Red Brown or Black Neutral White or Grey Blue or Black Blue Earth / Ground Green or Green-yellow Green-yellow Green-yellow Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...

  • Page 85: Calibration Records

    Zero air source Flow meter Gas Regulator 1 Gas Regulator 2 Table 3: Gas cylinder details Cylinder Gas Type Gas Balance Manufacturer Expiry date pressure Air N Isobutylene Air N Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 86 Table 4: Site inspection Check the local surroundings to see if anything has changed which could inf luence the ongoing ambient gas measurements. Observations Table 5: Monitor pre-checks Before opening the door SOP description Observation / reading Pass / Fail / Done Put monitor into service mode Gas inlet secure Particle inlet secure...
  • Page 87 Table 6: Individual module flow rates, leak check manifold and bypass valve Check all gas connections Pass / Fail Leak check sampling manif old Pass / Fail Flow Rate Total module flow Flow rate last measured Flow rate measured now If f low rate is the same then pass, Pass / Fail Pass / Fail...
  • Page 88 Min -0.050 Max +0.050 0.005 0.002 Min -0.050 Max +0.05 0.0 0.002 0.002 Min -0.05 Comments: Equation 4: New offset = Current offset + (AQS gas reading / Gain) Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 89 2 % of span min 0.2 max 5.000 span ± 5 % 2 % of span min 0.2 max 5.000 span ± 5 % 2 % of span min 0.2 Aeroqual Dust Sentry and AQS User Guide © Aeroqual Ltd. 2023...
  • Page 90 Table 9: Calibration Post-checks Description Observation / reading Pass / Fail / Done Disconnect calibration equipment Record total inlet f low rate Replace the mesh inlet and cap Lock door Secure the site Service mode...
  • Page 91 Every day, environmental prof essionals around the world are working hard to protect people and planet f rom the impact of air pollution. Since 2001 Aeroqual has equipped environmental prof essionals with technology that takes the time and hassle out of air quality monitoring projects. Government, industry, researchers and environmental consultants trust us to deliver actionable data built on industry-leading sensor technology, wirelessly connected to sof tware in a single integrated package.

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