MRK-D-0014, V1.0 Page | 1 Aeroqual Dust Sentry User Guide · OFF OFF ON OFF Wind Sonic with RS232 communication + Cirrus MK427 Noise ON OFF ON OFF Cirrus MK427 Noise module only

MRK-D-0014, V1.0 Page | 1

Aeroqual Dust Sentry User Guide

MRK-D-0014, V1.0 Page | 2


Table of Contents

User Guide Revision History ............................................................................................................... 4

Description ..................................................................................................................................... 5 1.1. Nephelometer .......................................................................................................................... 6

1.1.1. Electrical connections to Nephelometer .......................................................................... 6 1.1.2. Inlet Heater ...................................................................................................................... 6 1.1.3. Inbuilt Filters .................................................................................................................... 6

1.2. Pump Module .......................................................................................................................... 7 1.3. Power Module ......................................................................................................................... 8 1.4. Auxiliary Module (Optional) ..................................................................................................... 8 1.5. Crevis PLC (Optional) ........................................................................................................... 10 1.6. Cellular IP GPRS modem (Optional) .................................................................................... 11 1.7. Electrical Connections ........................................................................................................... 11

Assembly and Installation .......................................................................................................... 12 2.1. Assembly of heated inlet ....................................................................................................... 12 2.2. Connect Mains Power ........................................................................................................... 13 2.3. Sample Collection Filter (Optional) ....................................................................................... 14

Connecting to the Dust Sentry .................................................................................................. 15 3.1. Initial Connection using Aeroqual Connect ........................................................................... 15 3.2. Connection Options ............................................................................................................... 16

Client Mode ................................................................................................................... 16 Cellular Network Connection ......................................................................................... 17

3.3. Aeroqual Cloud ..................................................................................................................... 18 3.4. Connection Scenarios ........................................................................................................... 20

Using Aeroqual Connect and Cloud ......................................................................................... 21 4.1. Journal ................................................................................................................................... 21 4.2. Manage Data ......................................................................................................................... 21

Charts ............................................................................................................................ 21 Table ............................................................................................................................. 22 Download Data .............................................................................................................. 22 Manual Sync .................................................................................................................. 22 Auto Export (Optional Extra) ......................................................................................... 23

4.3. Calibration and Service ......................................................................................................... 23 Gain and Offset ............................................................................................................. 23 Zero Calibration ............................................................................................................. 24

4.4. Diagnostics and Advanced .................................................................................................... 24 Diagnostics .................................................................................................................... 24 Module Settings............................................................................................................. 25

4.5. Configure Instrument ............................................................................................................. 25 Settings ......................................................................................................................... 25 Configuring the System ................................................................................................. 26 Configuring the Sensors ................................................................................................ 26 Configuring the PLC Output .......................................................................................... 26 PLC Output .................................................................................................................... 26 Sensor List .................................................................................................................... 27 Data filters ..................................................................................................................... 27 Alerts (Optional Extra) ................................................................................................... 28 About ............................................................................................................................. 28

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Maintenance................................................................................................................................. 29 5.1. Maintenance Schedule .......................................................................................................... 29 5.2. Maintenance Procedures ...................................................................................................... 29

Sample Flow Adjustment .............................................................................................. 29 Zero Air Check (Purge Cycle) ....................................................................................... 30 Leak Check ................................................................................................................... 30 Manual Zero Air Check ................................................................................................. 31 Fibre Span Check.......................................................................................................... 31 Laser Current Check. .................................................................................................... 31 Filter Changes ............................................................................................................... 31 Cyclone and Inlet Cleaning ........................................................................................... 32

Mass Calibration ......................................................................................................................... 33

Troubleshooting .......................................................................................................................... 34

Specifications .............................................................................................................................. 36

Schematic Diagrams ................................................................................................................... 37 9.1. Pneumatics ............................................................................................................................ 37

Sample Mode ................................................................................................................ 37 Zero Mode ..................................................................................................................... 37

9.2. Electrical ................................................................................................................................ 38 9.3. Communication ..................................................................................................................... 38

Third Party Sensors .................................................................................................................... 39 10.1. Met One MSO ................................................................................................................... 39 10.1. Vaisala Weather Transmitter WXT520.............................................................................. 39 10.2. Gill WindSonic ................................................................................................................... 40 10.3. Cirrus MK427 Noise Sensor .............................................................................................. 40 10.4. Novalynx 240-200SZ Silicon Pyranometer ....................................................................... 40

Mounting and Site Positioning Guidelines ............................................................................... 41 11.1. Mounting ............................................................................................................................ 41 11.2. Inlet height ......................................................................................................................... 41 11.3. Measurement Interference ................................................................................................ 41 11.4. Safety ................................................................................................................................ 42

Appendix ...................................................................................................................................... 43 12.1. Warranty ............................................................................................................................ 43 12.2. Technical Support ............................................................................................................. 43 12.3. Declarations ...................................................................................................................... 43

12.4. Instrument Performance and Test Report………………………………………………….….44

12.5. Certificates……………………………………………………………………………………….45

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User Guide Revision History

Document Number: MRK-D-0014

Product Version: 1.3

Description: User Guide for Dust Sentry

Date Revision number Description of change Affected pages

May 2015 V1.0 Initial Release All

MRK-D-0014, V1.0 Page | 5


Description

Aeroqual’s Dust Sentry is a user friendly instrument designed to provide reliable real time indicative

particulate measurement of TSP, PM10, PM2.5 or PM1 using a well proven near forward light

scattering nephelometer and high precision sharp cut cyclone.

The instrument includes an embedded PC and two powerful software systems, Aeroqual Connect

and Aeroqual Cloud. There are numerous additional options available, including wireless

communications, SMS and email notifications, alarm functionality and the integration of factory tested

weather sensors. The instrument is packaged in a robust, lockable enclosure and is light enough for

one person site installations. The ease of installation, as well as the extensive range of possible add-

ons, enables the unit to be used in a wide range of applications.

The key components of the Dust Sentry are described below.

Fuse Holder

Note: 12 VDC Power Supply mounted externally at base

Embedded

PC

Purge Filter

Modem

(Optional)

Din Rail Terminals

and PSU

termination

Pump Module

(Communications)

Sample Filter

Pump Module

(Pneumatics)

PM

Optical

Engine

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1.1. Nephelometer Aeroqual uses a customised Nephelometer optical sensor from Met One Instruments. The optical

sensor uses light scattering from particulate matter to provide a continuous real-time measurement of

airborne particle mass. The light source is a visible laser diode and scattered light is measured in the

near forward angle using a focusing optics and a photo diode.

The Nephelometer has an on-board temperature sensor which corrects for thermal drift, sheath air

filter to keep the optics clean, automatic baseline drift correction and a fibre optic span system to

provide a check of the optical components.

1.1.1. Electrical connections to Nephelometer

The electrical connections to the Nephelometer are summarised below. These connections are

terminated in a 8 way molex connector:

Wire colour Function

Orange (x2) Fibre optic solenoid

Red 5V (power in)

Black Ground

White Signal out (0-5 V)

Black/white Signal Ground

Yellow Laser current monitor ( 10mV = 1 mA laser current)

Grey Temperature output

1.1.2. Inlet Heater

The Dust Sentry uses a 12 V heater on the sample inlet tube to reduce the humidity of sampled air to

prevent particle growth and fogging of the Nephelometer optics in high RH conditions. The inlet

should always be heated.

1.1.3. Inbuilt Filters

The Nephelometer contains two filters which should be replaced at specified intervals (see

Maintenance Section 5). The “Sample” filter is a coarse filter designed to protect the sample pump

from excessive particle build-up. The “Purge” filter is a fine filter which filters the sheath air flow and

also produces particle-free air during the auto-zero cycle.

Safety: This sensor is considered a Class I laser product. Class I laser products are not

considered to be hazardous. There are no user serviceable parts inside the cover of

the sensor. The device contains a laser operating at 670 nm which is visible to the eye

and can cause damage to the eye if directly exposed. Only trained service personnel

should attempt servicing or repair of the sensor.

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1.2. Pump Module

The Pump Module is split into two sections:

1. The electronics

2. The pump and pneumatics

The functionality of the electronics module can be seen below:

Note: The jumpers in the module should be positioned as shown in the image above.

The pump and pneumatics are easy to access for servicing and replacement:

Status LED

12VDC Power

Connectors

RJ45 Connectors for

RS485 bus

Connection

80180 engine

PM Fibre Span Switch

Inlet Heater

Connection to

Purge Pump

Connection to

Sample Pump

Pin 1 = 12V (blue)

Pin 2 = GND (white) Purge Pump

Pin 3 = 12V (red)

Pin 4 = GND (black) Sample Pump

Purge

Pump

Sample Pump

Exhaust Line

Sheath

Air Out

Sample In

Connection to

electronics module

(Pin 1 to 4)

Jumpers

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1.3. Power Module

The Dust Sentry internal power requires regulated 12 VDC to

maintain a constant pump speed. An external mains to

12VDC power supply (Meanwell HLG80-12A 60W 12V) is

fitted on the outside of the enclosure and this will allow

connection to mains supply.

Note: If you wish to run the Dust Sentry on solar power you will need to use a DC-DC convertor

in order to supply a regulated 12 VDC for the Dust Sentry

1.4. Auxiliary Module (Optional)

The auxiliary module acts as an interface between third party sensors and the Dust Sentry

communication bus. It is configured with different operating modes which can be selected by using

the dipswitches located on the side of the module. Aeroqual has integrated a number of third party

sensors and is able to supply the auxiliary module preconfigured for your sensors.

The tables below list the various functions:

Firmware: AUX_MODULE_01.

Use for: Analogue inputs, Vaisala WXT520 weather, Gill Windsonic wind, Cirrus MK:427 noise.

1 2 3 4 Function

OFF OFF OFF OFF Default - standard Auxiliary module with AN1, AN2, Freq

ON OFF OFF OFF Vaisala WXT520 with RS232 communication + AN1, AN2, Freq

OFF ON OFF OFF Vaisala WXT520 with RS232 communication + Cirrus MK427 Noise

ON ON OFF OFF Wind Sonic with RS232 communication + AN1, AN2, Freq

OFF OFF ON OFF Wind Sonic with RS232 communication + Cirrus MK427 Noise

ON OFF ON OFF Cirrus MK427 Noise module only

Programming Dip

Switch

Programming

Port

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Firmware: AUX_MODULE_02.

Use for: Analogue inputs, Met One MSO weather, Met One 034b wind, Cirrus MK:427 noise.

1 2 3 4 Function

OFF OFF OFF OFF Default - standard Auxiliary module with AN1, AN2, Freq

ON OFF ON OFF Cirrus MK427 Noise module only

OFF ON ON OFF Met One MSO with RS232 communication + Cirrus MK427 Noise

ON ON ON OFF Met One MSO with RS232 communication + AN1, AN2, Freq

OFF OFF OFF ON Met One 034B analogue module + Cirrus MK427 Noise

The third party sensor needs to be correctly wired into the auxiliary module for it to function correctly.

The image and table below provide further information on wiring the auxiliary module.

Example of wiring:

Wind Sonic (Pin 1) GND,

SIGNAL GND (Pin 2) 12V (Pin 5) RX (Pin 6) TX

Vaisala

(Pin 1) GND for

operating, data &

heating

(Pin 2) 12V for

operating & heating (Pin 5) RX (Pin 6) TX

Met One MSO

(Pin 1) GND,

SIGNAL,

COMMON, SHIELD

(Pin 2) 12V (Pin 5) RX (Pin 6) TX

Met One 034B (Pin 1) GND (Pin 11) METONE

034B PWR (Pin7) WD (Pin 9) WS

Cirrus MK:427 (Pin 1) GND,

ACTUATOR GND

(Pin 2) 12V, LOOP

IN (Pin 8) LOOP OUT

(Pin 12)

ACTUATOR IN

Pin 12

Pin 1

Status LED

12VDC Power

Connectors

RJ45 Connectors

for RS485 bus

Wiring of Aux Module:

PIN 1: GND

PIN 2: 12V FUSED

PIN 3: RESERVED

PIN 4: RESERVED

PIN 5: RX

PIN 6: TX

PIN 7: 0-5V IN

PIN 8: 4-20mA IN

PIN 9: FREQ IN

PIN 10: AGND

PIN 11: METONE 034B PWR

PIN 12: CIRRUS ACTUATOR

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A programming port is also exposed through the side of the module to allow custom programs to be

loaded into the module.

Note 1: Aeroqual can supply a standard programming tool for approved technicians to

reprogram the auxiliary module to the specified requirements.

Note 2: The above wiring connections are subject to change, please refer to the third party

sensor manuals for the latest wiring instructions.

Note 3: If a Novalynx 240-200SZ Pyranometer is purchased the Auxiliary module will be

preconfigured for this sensor. Pin 2 (12V) and Pin 8 (4-20mA IN) need to be wired in.

1.5. Crevis PLC (Optional)

The Dust Sentry can be configured with a Crevis controller and

Crevis output cards. These output cards are designed to convert

the Dust Sentry’s digital values to analogue outputs. The cards

offer 4 x 4-20mA and 2 x relay outputs which can be user

configured in Aeroqual Connect or Aeroqual Cloud.

The Crevis controller type is Modbus NA-9171 and the mode type

is Modbus RTU. The outputs cards are ST-4214 for the 4-20mA

outputs and ST-2747 for the relay outputs. Further information

and specification on both these cards can be found on the USB

stick provided with the instrument.

The Crevis is powered by the Dust Sentry 12V power supply. As a

result the maximum load is 300ohms. If a higher maximum load is

required an external 24V power supply can be used to power the

Crevis. This will allow for a maximum load of at least 500ohms.

Wiring instructions can be found below. There are several glands

located at the base of the Dust Sentry which can be used to wire

an external device.

Wiring the 4-20mA output card

12V Power In

MRK-D-0014, V1.0 Page | 11


Wiring the relay output card

Note 1: The AC power option will not work on the Dust Sentry. The maximum voltage is 24VDC

Note 2: The default relay setting is Normally Open

Note 3: The default 4-20mA setting is to report 4mA. If this option is disabled it will continue to

read 4mA.

Note 4: Please see Section 4.5.5. for information on configuring the set points and channels.

1.6. Cellular IP GPRS modem (Optional)

The Moxa G3111 Modem is a compact quad-band GPRS IP gateway which

allows connection of the Dust Sentry to a cellular network. The modem is

preconfigured to work alongside the embedded PC installed in the instrument

and is set up with a virtual server to allow direct connection to Aeroqual

Connect. If required, a DynDNS can also be created for direct connection to

Aeroqual Connect on a public dynamic IP address.

Note: See Section 3.2.2. for more information on configuring the modem.

1.7. Electrical Connections

RS485 Bus

The two wire RS485 bus connections are made using 20 cm CAT5 cables between the sensor

modules.

12 VDC Power Bus

All modules inside the Dust Sentry operate from the 12VDC power. The power is supplied by a daisy

chain of black and red cables. To turn off the 12VDC power to the Dust Sentry, release the fuse

holder.

12 VDC Power in

12 VDC power is connected into the instrument at the din rail terminals.

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Assembly and Installation

2.1. Assembly of heated inlet

Parts List:

A. Inlet Tube/Heater including power cable

B. Sharp Cut Cyclone (if fitted)

C. TSP Inlet

i. Connect parts A, B and C

ii. Open door of enclosure and remove protective cap from the optical engine

iii. Insert Inlet Tube Assembly through base mount and fix the three mounting screws

Note 1: Make sure the O-Ring is fitted before connecting the inlet tube assembly. The O-Ring

should be lubricated to reduce wear and tear. Lubricant is provided in the Dust Monitor

Service Kit.

Note 2: Ensure the power cable is fed through the inlet hole when connecting in inlet tube.

O-Ring

A B C

Protective

Cap

3x M3 Mounting

Screws

MRK-D-0014, V1.0 Page | 13


iv. Connect power to Inlet Tube/Heater inside the enclosure

2.2. Connect Mains Power

1. Locate the power connector terminal which is situated outside the enclosure at the bottom.

The power supply will already be wired to the connector however the cable to connect to

mains power needs to be wired.

Caution: The high voltage mains supply must be wired by a certified electrician in

compliance with local electrical regulations.

3. Reconnect into the connector

ensuring the plugs are fitted securely

and the nut gland tightened.

Plug

Nut gland

Connector

Terminal block

Neutral

(Blue)

Earth

(Yellow/Green)

Live

(Brown)

2. Feed the power cable through the nut gland

plugs and connector and wire the cable to the

terminal block according to the diagram.

Note: To remove the terminal block from inside the connector unclick it from the casing by

turning it slightly then pull out

1. Unscrew the nut

gland to loosen the

terminal block and pull

connector apart

Power cable from

heated inlet

MRK-D-0014, V1.0 Page | 14


2.3. Sample Collection Filter (Optional)

The Dust Sentry can be fitted with a 47mm collection filter holder if requested. It is used to collect

particulate samples for composition analysis.

Note: If the Dust Sentry is shipped with a sample collection filter holder, it

will not contain a filter on arrival. The filter will be packed separately in the

accessories box.

If you wish to use the sample collection filter:

1. Remove the internal sample filter from the 80180 optical engine (See

Section 5.2.7.)

2. Unscrew the collection filter housing, remove the black gasket and

insert a 47 mm filter.

Note: When the filter holder is not being used make sure the gasket is fitted to

reduce potential for leaks.

3. Tighten the collection filter housing using the wrench provided.

4. Check and adjust the sample flow to 2.0 LPM (See Section 5.2.1.)

The sample collection filter must be changed at regular intervals to avoid the filter blocking and

overloading the pump.

Instrument type Elevated PM levels Typical PM levels

Dust Sentry PM10 or TSP 1 week 2 weeks

Dust Sentry PM1 or PM2.5 2 weeks 4 weeks

Note: These are recommended maximum timeframes

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Connecting to the Dust Sentry

3.1. Initial Connection using Aeroqual Connect

Aeroqual Connect is the instrument operating software which comes with the Dust Sentry and allows

the user to be connected directly to the instrument. It can be accessed via WIFI, Ethernet or a cellular

modem. The on-board computer has an Ethernet output for direct wired connection. Alternatively,

connection can be made over WIFI by connecting to the Dust Sentry network (Access point mode), a

local network (Client mode) or via a modem.

The default setting of the instrument when first purchased will be to connect to Aeroqual Connect via

access point mode. Access point mode allows connection to the Dust Sentry via the Dust Sentry

network signal which will show up on a laptop, tablet or smart phone within range. This type of

connection will most commonly be used when working on the instrument in the field. However, it will

also be used to initially connect when the instrument first arrives.

Connecting by this mode will mean the user’s device is connected via WIFI directly to the Dust Sentry.

There will be no internet connection on the user device when using this option. To connect you will

need to select the Dust Sentry WIFI network and enter the password.

Note: The default user name and passwords can be found on Page 1 of the log book.

Once a WIFI connection has been made Aeroqual Connect can be accessed via the PC browser by

entering the IP address 10.10.0.1 in the address bar. The login screen below will then be displayed.

MRK-D-0014, V1.0 Page | 16


1. An Aeroqual Connect login name and password will be provided when Aeroqual Connect is

first purchased. If you do not know your login details please contact [email protected].

2. Once you have logged in the homepage will be displayed.

Note 1: Different applications will appear depending on the user accessibility configured for

your account.

Once the first connection has been made (via access point mode) the WIFI communications can be

configured according to how you would like the system to respond. This can be done via the settings

tab under the Configure Instrument application.

3.2. Connection Options

Client Mode

Client mode allows connection to the Dust Sentry via a local network (e.g. your office network). If

there is a local WIFI or LAN network available at the Dust Sentry installation site then the instrument

can be set up to connect to this network. This might be the case if the Dust Sentry is installed on the

perimeter of an industrial site and the WIFI network extends out to where the unit is installed.

Alternatively the Dust Sentry can be connected to the local network via an Ethernet cable from the

instrument to the local router using the Ethernet output on the base of the Dust Sentry.

When the Dust Sentry is connected to your local network (such as your office WIFI network), the local

network will automatically assign a local IP address to the instrument. The IP address assigned to the

instrument can be found in the Configure Instrument application when logged in via Aeroqual Cloud.

Entering this IP address into the web browser will open Aeroqual Connect for that specific instrument,

assuming you are within the local network.

If the local network allows outside access (e.g. via VPN), connection to the Dust Sentry can be made

from anywhere in the world. In the more common scenario where the local network does not permit

outside access you may still connect to the Dust Sentry using Aeroqual Cloud through the internet

because most local networks permit internet access.

To configure the Dust Sentry to use client mode the instrument needs to be configured via the

settings tab under the Configure Instrument application.

1. The WIFI mode needs to be set to Client

2. The WIFI SSID (local network name) needs to be entered (e.g. your office WIFI name)

3. The WIFI password needs to be entered (e.g. the password for your office WIFI)

Note 1: Before changing the WIFI settings it is recommended that you have another

connection to the instrument established – typically by connecting the instrument to your LAN

using the Ethernet connection and using Connect with the LAN IP address.

Note 2: Once WIFI client mode is set up Aeroqual Connect will automatically disconnect from

WIFI access point mode. Connection will then need to be made via Aeroqual Cloud (See

section 4.5) to see the local IP address assigned to the instrument.

Note 3: If the local WIFI network password changes or you enter it incorrectly, you could be

locked out of the Dust Sentry. If this happens you will need to re-set the Dust Sentry back to

factory default settings, which puts the Dust Sentry back in to Access Point mode with a

default password. You can then reconfigure the settings correctly. Contact

[email protected] for information on how to perform this process.

mailto:[email protected]


MRK-D-0014, V1.0 Page | 17


Cellular Network Connection

If the Dust Sentry has an IP modem installed in the instrument a connection can be made via a

cellular network. This option is useful when remote access to the Dust Sentry is required but there is

no local network signal at the instrument installation site so client mode cannot be used. Aeroqual will

preconfigure the modem and load a default APN (Internet). This may work without having to be

changed. If set up is still required, only the APN, User name and Password needs to be modified.

Note 1: A local data telecommunications contract and SIM card is required.

Note 2: The Dust Sentry uses approximately 20 megabytes per sensor per day. This is an

estimate for a Cloud connection and can vary wildly depending on the cellular provider.

Note 3: Using Aeroqual Connect via the modem will incur higher data usage.

1. The IP modem can be set up by plugging directly from the modem Ethernet port to a laptop

Ethernet port and browsing to 192.168.127.254.

2. In the menu select Network Settings GSM GPRS Settings and configure settings as per

picture below. Contact your SIM card provider to obtain full ATD and APN settings. Click

Submit button.

3. Unplug MOXA unit from the network and plug it into Dust Sentry embedded PC. Restart Dust

Sentry embedded PC and modem.

4. In the Configure Instrument application the Ethernet Mode setting needs to be set to Auto

(DHCP). WIFI mode should still be set to Access Point so a direct connection can still be

made.

5. If you do not wish to use Aeroqual Cloud a public static IP or a DynDNS service will need to

be set up to create a permanent web address for the Dust Sentry.

6. A Dyn account can be created at https://account.dyn.com/cart/?via=upgrade-now

7. Log in to your account and add a new host name:

https://account.dyn.com/cart/?via=upgrade-now

MRK-D-0014, V1.0 Page | 18


8. Go back to MOXA modem configuration interface, and choose System Management - > Misc.

Network Settings - > DDNS. Select enable and DynDns.org. Input the host name created in

Dyn account, user name and password as well for the Dyn account. Then click Submit button,

Save and Restart. Now the modem should be ready to be connected via host name.

9. Enter the set up web address into the web browser to access Aeroqual Connect.

Note 1: No data is stored on the DynDNS server. It only acts as an access point to

communicate with the Dust Sentry.

Note 2: In some countries the telecommunications provider will block incoming requests to

the modem. If this is the case DynDns will not work with regular SIM cards. Contact your

telecommunications company about using an open APN or use a private APN.

3.3. Aeroqual Cloud When using Aeroqual Cloud, the user is connected to the Aeroqual Cloud server. The Dust Sentry

instrument is also connected to the Cloud server. The user connects to Cloud over the internet; the

Dust Sentry is connected to the Cloud server using WIFI, Ethernet or Cellular (modem required).

Aeroqual Cloud is a website.

MRK-D-0014, V1.0 Page | 19


Aeroqual Cloud allows management of either a single Dust Sentry unit or a network of Dust Sentry

units by using any internet-enabled browser.

Aeroqual Cloud has all of the control features of Aeroqual Connect. The additional benefits of having

Aeroqual Cloud include:

View and manage a network of instruments

Remotely update instrument firmware

Advanced user access management

Enjoy faster browsing speeds

Minimise data usage costs

Back up data so it can never be lost

Access data even when the instrument is offline

Send SMS/text and email alerts (optional)

Auto export data via FTP to another server (optional)

Auto export a data file via email (optional)

As a user, you simply access Aeroqual cloud through the internet; Aeroqual Cloud is a website which

provides total control over your Dust Sentry. You will need to go to http://cloud.aeroqual.com and

enter your login name and password.

Note 1: If you do not know your login name and password please contact

[email protected]

As well as having access to all the features available in Aeroqual Connect, Aeroqual Cloud can be

used to manage a network of Dust Sentrys. Depending on the user accessibility configured to your

account, Dust Sentry units can be managed by Organisations and Networks. This feature is available

in the Administration application.

The Dust Sentry must have internet access for you to see it and control it using the Cloud website.

For the Dust Sentry to have internet access it must be either in Client mode, as described above, and

be on a network which permits internet access (most networks do permit internet access). A modem

is not required in this situation.

Organisations Networks Instruments

http://cloud.aeroqual.com/


MRK-D-0014, V1.0 Page | 20


Or if a local network is not available, the Dust Sentry must have an IP modem installed and a SIM

card and data contract with a local telecommunications provider.

3.4. Connection Scenarios

There are a number of ways to connect to the Dust Sentry instrument using Aeroqual Connect or

Aeroqual Cloud. To help clarify which connection should be used please refer to the tables below

which shows the 4 most common scenarios.

Dust Sentry

Location

User

Location Recommended Connection

Office Office

The Dust Sentry should be connected to the office WIFI network

using client mode. You can then connect using Aeroqual Cloud.

Aeroqual technicians will also be able to connect using Aeroqual

Cloud if support is required. A wired Ethernet connection can also be

made from the Dust Sentry direct to the local router.

In the field and

modem is installed Office

If the Dust Sentry is on a 3G network permanently you can connect

using Aeroqual Cloud from your office at any time.

In the field and

modem is installed At site

If you are in the field with the Dust Sentry, you can connect directly to

the instrument via Aeroqual Connect using the Dust Sentry as an

access point

In the field and no

modem installed At site

If you are in the field with the Dust Sentry and there is no 3G

available you can connect as an access point while in the field. Use

manual sync to upload data to Aeroqual Cloud when back in the

office and WIFI is available.

If you are not using Aeroqual Cloud there are 3 options:

Dust Sentry Location User Location Recommended Connection

In the field and modem

is installed Office

If the Dust Sentry is on a 3G network permanently use a

DYDNS service to connect directly to the instrument via

Aeroqual Connect.

In the field and modem

is installed At site

If you are in the field with the Dust Sentry, you can connect

directly to the instrument via Aeroqual Connect using the Dust

Sentry as an access point

In the field At site If there is no 3G available you can only connect to the Dust

Sentry using WIFI access point whilst on site.

Aeroqual Connect is the lead system. If both the Aeroqual Connect and Cloud systems are

being run simultaneously, any changes made in Aeroqual Connect will override the

changes made in Aeroqual Cloud.

MRK-D-0014, V1.0 Page | 21


Using Aeroqual Connect and Cloud Aeroqual Connect and Cloud have a range of applications available which allow the user to access

data, assess performance, schedule calibrations and diagnose faults remotely.

4.1. Journal The journal can be accessed by selecting Journal on the menu bar located at the top of the screen. It

is used to log when any changes are made to the Dust Sentry. The journal is searchable by date

using the side bar and filtered via the drop down menu.

The filter allows entries to be searched by:

User Entry – Manually entered journal entries

Calibration – Changes associated to calibration e.g. gain and offset modifications and

notification when service actions start and stop

Configuration – Changes made to the Dust Sentry configuration e.g. sensor added or

communications altered

Module Settings – Changes made to the sensor module settings

System changes – Notifies when the Dust Sentry starts up, shuts down or is rebooted

Note 1: To manually create a journal entry select “Add user entry”, type in the relevant

information and press save.

Note 2: Service mode is initiated by starting “Manual Service Mode” in the Calibration and Service application. A journal entry will be automatically generated when the service is started and stopped.

4.2. Manage Data

The manage data application allows the user to view the data either as a chart or in a table. There is

the option to view the raw or averaged data as well as the ability to filter the data to show specific time

periods. The data can also be exported for further analysis within this application.

Charts

To view the data in graphical format select the “Charts” option.

The charts can be configured to view a specific time period using the “From” and “To” dates

shown at the top of the screen.

An averaging period can also be selected from the drop down menu

Note: The minimum average period is determined by the date range

MRK-D-0014, V1.0 Page | 22


Table

To view the data in a table select the “Table” option.

The data can be configured to view a specific time period using the “From” and “To” dates

shown at the top of the screen.

The data can also be filtered using the “Averaging Period” drop down menu.

Note 1: The minimum average period is determined by the date range

Note 2: Depending on the administration rights, raw data can also be viewed. This is 1 minute

data without data filtering in place

Download Data

Data can be downloaded by selecting “Download Data”.

A specific data set can be chosen for download by using the “From” and “To” date selection.

The Journal can also be downloaded if required.

Note: The data will be downloaded in csv. format

Manual Sync

If the Dust Sentry is outside of cellular and WIFI range, the Dust Sentry data can always be

downloaded to your device using a WIFI access point (see Section 3.1.) when at the instrument site.

The data will be downloaded to an unreadable file and will include all information stored on the Dust

Sentry on-board PC. The file can then be uploaded onto Aeroqual Cloud, once a WIFI or cellular

network is available, to view the data from the unit, including diagnostics and settings.

MRK-D-0014, V1.0 Page | 23


To download the data: In Aeroqual Connect select Manual Sync in the Manage Data application.

Here it will prompt you to select a location on your PC to download the data to.

To upload the data: In Aeroqual Cloud select Manual Sync in the Manage Data application. Here it

will prompt you to upload the file which was previously downloaded from Aeroqual Connect.

Note: If there is a lot of data to download from Aeroqual Connect multiple manual syncs may

need to be performed. The date in the manual sync function updates showing how much data

has been downloaded.

Auto Export (Optional Extra)

The auto export option allows the data to be automatically exported to either a selected email address

or to an FTP server. To set either of these features up they need to be enabled by selecting the

enable check box under the auto export option.

Email: To enable auto export to a specific email the frequency, format and averaging period needs to

be selected. There is also the option to include the journal in the export. Make sure a correct email

address is entered and save the changes for it to take effect.

FTP: To enable auto export to a FTP server the frequency, format and averaging period needs to be

selected. There is also the option to include the journal in the export. The FTP server, user name and

password also need to be entered correctly. Save the changes for it to take effect.

Note: The journal captures any error messages; these are particularly useful for

troubleshooting.

4.3. Calibration and Service The calibration and service application allows the user to perform manual adjustments to the gain and

offset settings for the nephelometer.

Gain and Offset

Selecting the “Gain and Offset” menu will display the gain and offsets for all the configured

PM sizes in the Dust Sentry. Between 5 and 50 real time measurements will also be

displayed, as well as the average and standard deviation for the shown readings. These

numbers will automatically update.

MRK-D-0014, V1.0 Page | 24


Prior to any manual calibration or servicing activities the “Manual Service Mode” button

should be started. This will ensure the raw data is highlighted and labelled appropriately to

show that a service is being performed. This is particularly helpful to alert when a calibration

has taken place to ensure the readings are disregarded from any future data analysis.

Note 1: Any flagged data is disregarded when calculating averaged readings.

Note 2: Remember to stop the “Manual Service Mode” after the service has been completed to

ensure future reported data is tagged as “Sample” data.

Note 3: The Manual Service Mode will automatically stop after 24 hours if left running.

The calibration parameters can be adjusted manually by clicking the setting that requires

changing, entering the new value and pressing save.

Zero Calibration

Selecting the zero calibration menu will give you the option to manually start the purge cycle. The

purge cycle is designed to pump air backwards through the optical engine as a cleaning mechanism.

For more information on performing a manual zero check please see Section 5.2.2.

Note: The Dust Sentry will perform an automatic zero calibration every 12 hours.

4.4. Diagnostics and Advanced The diagnostics and advanced application allows the user to view the sensor module settings as well

as the sensor diagnostics. This information is useful when fault diagnosing an issue with a module.

The diagnostic data can be exported for further analysis and the sensor module settings can be

updated or modified in this application.

Diagnostics

The diagnostics view will display the diagnostics for the selected parameter. The data can be

paused or exported using the buttons above the table.

40 minutes of data will be displayed at a time and the data will automatically update unless

the pause button is pressed.

MRK-D-0014, V1.0 Page | 25


Module Settings

The module settings view will show the individual module settings and version number for all the

parameters configured inside the Dust Sentry.

The module settings can be changed by selecting the value that needs changing, entering the

new value and clicking save.

Note: Incorrect modification of module settings may cause irreversible damage. Do not change

settings without contacting Aeroqual or a qualified service agent.

4.5. Configure Instrument The configure instrument application stores all the configuration settings relevant for the specific Dust

Sentry connected. Depending on the user type different features will be accessible. The application

can also be used to view a complete sensor list for all parameters that have been configured on the

Dust Sentry, filter data and set up SMS and email alerts if this function has been purchased.

Settings

The settings tab is split into 5 columns which display different information relevant to the Dust Sentry.

MRK-D-0014, V1.0 Page | 26


Configuring the System

The serial number is listed here. It cannot be changed and is also shown on the

log book and inside the Dust Sentry enclosure.

The name of the instrument can be set by the user, for example, to reflect the

location or customer that is running the Dust Sentry

The device, software version and time last contact was made with the cloud

server is listed here for reference.

The time zone of the Dust Sentry can be set here to display the correct date for

the region the instrument is installed in.

The default averaging period can be configured here. Data can be configured to

read from 1 minute to daily averages.

Service time out can be set here. This is important if the manual service mode is

left on by accident. The time out value will stop manual service mode after the

time period set.

The restart instrument checkbox will force a restart of the embedded PC. The

checkbox will be cleared automatically after restart.

Configuring the Sensors

The default unit of measurement for PM is µg/m3.

The poll interval and poll time out functions will control how often the embedded

PC polls the modules. This should not be changed.

The active sensors will be displayed here. If a module has been added the

sensor will need to be selected from the drop down menu and added to the active

sensors list. Sensors can also be removed by clicking on the sensor name.

Configuring the PLC Output

v. If a Crevis is installed in the Dust Sentry the 4-20mA output module and relay

output module options should be check marked.

vi. The baud rate and COM port used will also be shown here. These settings

should not be changed.

Note 1: For information on the communications section please see Section 3.

Note 2: For information on the legacy section please contact Aeroqual.

PLC Output

The 4-20mA and relay output modules can be configured here. There are four 4-20mA output

channels available which can be set to read a user defined parameter and range. The relay output

module has two relay options that can also be user configured. The parameter, set point and reset

point can be added here. The relays can be configured as either rising or falling edge triggers.

If the set point is exceeded the relay is activated. This can be used to activate a siren or strobe or

other peripheral devices. The relay remains activated until the measured value drops below or

reaches above the reset point.

Rising Edge: Relay is energised when the concentration reaches above the set point and stays on

until the concentration drops below the reset point, which is set at a lower concentration than the set

point.

Falling Edge: Relay is energised when the concentration is below the set point and stays on until the

concentration reaches above the reset point, which is set at a higher concentration than the set point.

The relay will remain off until the concentration drops down below the set point.

MRK-D-0014, V1.0 Page | 27


Note: Please see Section 1.5 for more information on the Crevis PLC

Sensor List

The sensor list tab displays all the sensors that can be configured into the Dust Sentry. The table is

mainly for reference and shows all the settings configured for each sensor e.g. the units and

conversion factors. If a new sensor list is released it can be imported in this section.

Data filters

The negative number filter can be turned on for specific

parameters in this section. If you do not want the data to

show negative numbers for certain parameters, check the

checkbox of that specific parameter. Any negative numbers

reported will now show as zero.

Note: The negative number filter is NOT applied to RAW

readings. It is applied to all averaged readings.

MRK-D-0014, V1.0 Page | 28


Alerts (Optional Extra)

SMS and email alerts can be set up in this section. Alerts

can be set to notify when:

1. a concentration exceeds the user defined set point

2. a sensor fails

3. the Dust Sentry is in operation mode

4. the Dust Sentry goes offline

Note 1: Operation mode allows alerts to be sent when

the mode changes. For example, if the unit changes

from normal mode to zero calibration, or manual service

mode an alert is triggered. An alert will also be sent

when the unit returns to normal mode.

An email address and/or SMS number needs to be entered into the relevant fields to allow the alerts

to be sent. Multiple alerts can be set up by pressing the Add a new alert button.

Note 2: Phone numbers need to be in the format +64234566 with no spaces. A space is treated

as a separate phone number.

Note 3: SMS alert allowance is 50 per month. If two phone numbers are entered in a single alert

it counts as 2 messages.

About

The about screen shows information regarding your

Aeroqual Cloud license. It shows:

Instrument Type

Version

Licence Type

Last Contact

SMS Alerts Remaining

SMS Montly Allowance Roll Over Date

MRK-D-0014, V1.0 Page | 29


Maintenance

5.1. Maintenance Schedule

Procedure Section Frequency

Sample Flow Check 5.2.1 Monthly

Purge Flow Check 0 Monthly

Manual Zero Air Check 5.2.4 Monthly

Fibre Span Check 5.2.5 Monthly

Laser current check 5.2.6 Monthly

Filter Changes 5.2.7 3 to 6 months

Cyclone and Inlet Cleaning 5.2.8 3 Months

Cyclone Disassembly 5.2.8 12 Months

Optical sensor factory calibration

Contact Aeroqual 24 Months

Pump replacement Contact Aeroqual 24 Months

Note 1: Suggested intervals for maintenance procedures may vary with sampling intensity and

environmental conditions.

Note 2: All checks should be carried out during the initial commissioning of the Dust Sentry

5.2. Maintenance Procedures

Sample Flow Adjustment

A constant 2.0 LPM flow is essential to ensure the sharp cut cyclone is separating out the correct

particle size to be measured e.g. PM10 or PM2.5. To measure the flow, remove the TSP head and

connect a 0-2.5 LPM volumetric flow meter to the sharp cut cyclone inlet. Ensure the flow meter is on

a steady surface before reading the flow rate.

Note 1: The inlet should be connected to the TOP of the volumetric flow meter (negative flow)

Note 2: The sample flow should be 2.0 LPM

The PM inlet flow can be adjusted via the flow adjuster on the purge and sample lines:

1. Close PURGE FLOW adjustment valve (turn/direct valve handle against the pump module)

2. Adjust SAMPLE FLOW adjustment valve to set flow rate to a value of 2.2 LPM. If this is not

possible check for a leak (Section 5.2.3) and/or replace the sample and purge filters if dirty. If

these actions do not result in higher flow then the pump may need replacing.

3. Open PURGE FLOW adjustment valve to drop flow rate between 1.95 and 2.05 LPM

4. Replace the TSP inlet when finished.

MRK-D-0014, V1.0 Page | 30


Zero Air Check (Purge Cycle)

The purge cycle is designed to pump air backwards through the optical engine as a cleaning

mechanism. It also acts as a zero air check and adjusts the zero automatically. This will occur every

12 hours (720 minutes) automatically. To manually check the purge flow is operating correctly:

In Aeroqual Connect go to “Calibration and Service” and select “Zero Calibration”

Press start to initiate the manual zero calibration

The zeroing process will start in a few seconds and will last for 5 minutes

Connect the flow meter so the flow is out of the sample inlet towards the flowmeter gas inlet

The flow rate should be >0.2 LPM

If the flow is <0.2LPM then perform the sample flow (Section 5.2.1) and the leak check

(Section 5.2.3) procedures. If this does not increase the purge flow then check the filters

and/or replace the purge pump.

Note: The inlet should be connected to the BOTTOM of the rotameter (positive flow)

Leak Check

If the correct sample, purge or sheath flow cannot be achieved, there may be a leak in the pump

module or 80180 engine. First check the entire flow system:

Remove the purge connection from the module and plug the end of the purge line

Remove the TSP head and block the PM inlet.

Connect the pressure end of a flow meter to the exhaust port of the pump module.

If there is no leak the flow should drop to zero.

Exhaust Line

Purge connection (remove to

check whole flow system)

Sample connection

(remove to check

module)

1 3 2

MRK-D-0014, V1.0 Page | 31


If the flow does not drop to zero it suggests there is a leak somewhere in the system. To check the

pump module:

Keep the purge line disconnected.

Remove the sample connection and cap off the module sample port.

Connect the exhaust port of the module to the pressure end of a flow meter.

The flow should drop to zero.

If there is a leak in the pump module the module will need to be sent back to the Aeroqual factory.

Please contact technical support.

If there is no leak in the pump module check the tubing and connectors along the flow path carefully.

If you cannot isolate the leak it is likely the leak is located in the engine. In this case, the engine will

need to be sent back to the Aeroqual factory. Please contact technical support.

Manual Zero Air Check

A zero air check can also be carried out manually as a way to ensure the purge

is working correctly. To do this the TSP inlet needs to be removed and the

particle filter (supplied with the instrument) needs to be attached to the monitor.

Ensure there is a good seal around the cyclone inlet.

The filter will remove 99.99% of particulates from ambient air. Wait 5 minutes

and then check the readings on the control module. The reported value should

be <2 µg/m3. If it is not then the auto zero cycle is not performing correctly. You

will need to check the purge filter (Section 5.2.7) and replace if dirty and also

check the purge flow (Section 5.2.2) to make sure it is correct.

Fibre Span Check

The fibre span check is used to detect any major component failures in the laser and photo detector.

Perform a manual zero air check (Section 5.2.4) before doing a fibre span check.

Initiate the fibre span by turning the on the switch on the side of the PM electronics module.

Wait for 10 minutes for the measurement to stabilise.

In Aeroqual Connect go to “Diagnostics and Advanced” and select “Diagnostics”.

Select the PM parameter from the drop down menu and compare the ADC (V) to that on the

Aeroqual instrument performance and test report. The value should be within 20% of the

value on the test report.

Note: Contact Aeroqual or your local distributor if these values are incorrect or outside

specification.

Laser Current Check.

In Aeroqual Connect go to “Diagnostics and Advanced” and select “Diagnostics”. The PM parameter

needs to then be selected from the drop down menu. Compare the laser current value with the value

shown on the Met-One PM engine certificate. If the laser current has drifted up or down by more than

3mA, the engine may need servicing; please contact Aeroqual or your local distributor.

Filter Changes

There are two internal filters which are located on the side of the optical engine. They are designed to

provide protection and to clean purge air. These will become dirty and must be replaced periodically.

To do this, unscrew the filters from the side of the optical engine and replace with new filters. These

can be purchased from Aeroqual. Please contact technical support for a quotation.

MRK-D-0014, V1.0 Page | 32


Cyclone and Inlet Cleaning

The dust cap of the sharp cut cyclone will accumulate particulate matter and will need to be

periodically cleaned. Blow out the cyclone with compressed air and unscrew the dust cap and clean.

Replace the cap tightly and ensure there are no potential leaks.

The cyclone can be disassembled completely by removing the three Allen head screws and pulling it

apart. The internal parts should be cleaned with isopropyl alcohol once a year.

The TSP inlet can also be dismantled by unscrewing the 3 screws and separating the head into two

parts. Use a lint-free cloth wetted with isopropyl alcohol to clean both the inside and outside of the

inlet.

Dirty

Filter Purge

Filter

Sample

Filter

Clean

Filter

Allen head

screws

Screws

MRK-D-0014, V1.0 Page | 33


Mass Calibration

All particle monitors based on light scattering require a site calibration for optimum accuracy. This is

because the average density and light scattering behaviour of dust particles will vary from site to site.

This adjustment is sometimes known as a “K-factor”. Aeroqual recommends a site calibration be

performed at the time of initial installation and then every 12 months. Calibration is performed by co-

locating the Dust Sentry with a Reference Particulate Matter measurement system and adjusting the

Gain of the particle monitor so the average reading matches that of the Reference Instrument. A list of

Reference instruments can be found at: http://www.epa.gov/ttnamti1/files/ambient/criteria/reference-

equivalent-methods-list.pdf.

Install the Dust Sentry beside the Reference instrument. Make sure both instruments are setup

correctly. Two procedures are given below depending on whether the reference instrument is a

gravimetric or continuous instrument.

Procedure overview for Gravimetric Reference Instrument

1. Weigh a reference filter and install into the Reference instrument.

2. Leave the Dust Sentry and Reference instrument running for at least 24 hours until a weighable

quantity of particulate matter sample has been collected.

3. Check the sample flows of both instruments to ensure they are within specification.

4. Remove the Reference filter and re-weigh

5. Download the Dust Sentry PM data for the calibration period.

Calculations

1. Reference Filter Weight of PM (ug):

PM(Ref) = (filter weight at finish) – (filter weight at start)

2. Volume of air sampled by reference sampler (m3)

Volume(Ref) = minutes of test * Flow Ref (LPM) / 1000

3. Calculate average reference PM density (ug/m3)

AvPM(Ref) = PM(Ref)/ Volume(Ref)

4. Calculate average PM (ug/m3):

AvPM(Dust Sentry) = sum(PM readings over test period)/number of readings

Procedure overview for a Continuous Reference Instrument

1. Leave the Dust Sentry and Reference instrument running for at least 24 hours

2. Check the sample flows of both instruments to ensure they are within specification.

3. Download the Dust Sentry and Reference instrument data for the calibration period Calculations

1. Calculate average Dust Sentry PM (ug/m3):

AvPM(Dust Sentry) = sum(PM readings over test period)/number of readings

2. Calculate average Reference PM (ug/m3):

AvPM(Ref) = sum(PM readings over test period)/number of readings

Calculation of Dust Sentry Gain

1. Calculate K factor

K factor = AvPM(Ref) / AvPM(Dust Sentry)

2. You should then apply this to the Gain Factor on the PM channel.

new GAIN = old GAIN x K Factor

http://www.epa.gov/ttnamti1/files/ambient/criteria/reference-equivalent-methods-list.pdf

http://www.epa.gov/ttnamti1/files/ambient/criteria/reference-equivalent-methods-list.pdf

MRK-D-0014, V1.0 Page | 34


Troubleshooting

Symptom Possible Cause Fault isolation/Solution

PM values seem incorrect

Sample flow incorrect

Sample and/or purge filters

dirty

Gain factors incorrect

Offset factor incorrect

Check sample flow and adjust to

correct value using flow adjusters

Replace filters

Perform span calibration

Perform zero calibration

Low Sensitivity Laser is old

The laser current can be

measured under the

Diagnostics and Advanced

application.

Laser needs replacing.

Send to your authorised distributor or

contact Aeroqual technical support.

Low Sensitivity Dirty optics

Check H0 value for PM in

Module Parameter Table. If

above 0.1 then optics are dirty

Optics need cleaning



Noisy Readings

Laser is old or photodector is

failing



Laser or photodetector needs

replacing.



Negative readings Purge filter new and shedding

particles

Purge flow zero

Purge filter dirty

Run zero cycles until purge filter no

longer shedding particles.

Adjust purge flow

Replace purge filter

MRK-D-0014, V1.0 Page | 35


Fibre Span has changed

significantly since installation

Laser is old or photodetector

needs replacing



Laser or photodetector needs

replacing.



Readings flat Laser failed (check laser

current)

Photo-detector failed

Laser needs replacing.



Send optical engine to Met One for

replacement detector and calibration.

MRK-D-0014, V1.0 Page | 36


Specifications

Nephelometer PM1, PM2.5, PM10 or TSP 0 to 2000 μg/m3 <±(2 μg/m3 + 5% of

reading) 2.0 LPM <1 μg/m3

Control System Embedded fanless PC, Intel Atom N2600, 1.6GHz, 2GB RAM, 32GB SSD, Ubuntu Linux

Communications

Standard: WIFI, Ethernet (LAN)

Optional: Cellular IP GPRS modem

Software

Connect: Runs on embedded PC, accessed via web browser ( IE, Firefox, Chrome, Safari)

Cloud: Runs on secure ‘cloud’ servers, accessed via web browser

Connect / Cloud Features: configuration, diagnostics, journal, calibration and data acquisition,

plus SMS and email alerts (optional), and auto data export via FTP and email (optional)

Data logging 32GB Hard Drive (>20 years data storage)

Averaging period 1 min, 5 min, 10 min, 15 min, 30 min, 1 hr, 2hr, 4 hr, 8 hr, 12 hr, 24 hr

Outputs

RS232 (legacy mode)

2 x Relay (optional)

4 x 4-20mA (optional)

Power requirements

100-260VAC (standard): 15W / 24W*

Regulated 12VDC (if required): 15W / 24W*

Enclosure

Lockable IP65 GRP cabinet with integrated aluminium solar shield armour

Inlet: 36cm heated inlet

Dimensions 483H x 330W x 187D mm (including solar shield armour & mounting brackets)

Weight <13 kg*

Environmental operating range -10°C to +50°C

Mounting Wall/Pole mounting brackets included

Tripod (Optional)

47mm Sample Filter (Optional) 47mm filter for particle loading analysis

Factory Integrated & Tested

Sensors (Optional)

Gill WindSonic (ultrasonic wind sensor)

Vaisala WXT520 (weather transmitter)

Met One MSO (weather transmitter)

Cirrus MK427 Class 1 (noise sensor)

Novalynx Pyranometer (solar radiation)

MRK-D-0014, V1.0 Page | 37


Schematic Diagrams

9.1. Pneumatics

Sample Mode

Zero Mode

MRK-D-0014, V1.0 Page | 38


9.2. Electrical

9.3. Communication

MRK-D-0014, V1.0 Page | 39


Third Party Sensors

10.1. Met One MSO Description: Measures wind speed and direction; air temperature; relative

humidity; and barometric pressure

Specifications: For full details visit the company website www.metone.com

10.1. Vaisala Weather Transmitter WXT520 Description: Measures wind speed and direction; liquid precipitation; barometric

pressure; air temperature; and relative humidity

Specifications: For full details visit the company website www.vaisala.com

Wind Speed

Range 0-50 m/s

Accuracy ±2%

Resolution 0.1 m/s

Wind Direction

Range 0-360°

Accuracy ±5°

Resolution 1°

Air Temperature

Range

Accuracy

-40°C - +60°C

±0.5°C

Resolution 0.1°C

Relative Humidity

Range

Accuracy

Resolution

0-100%

±4%

1%

Barometric Pressure

Range

Accuracy

Resolution

500-1100 mbars

± 2 mbars

0.1 mbar

Wind Speed

Range

Accuracy

0-60 m/s

±3% (0-35 m/s)

Wind Direction

Range

Accuracy

0-360°

±3°

Liquid Precipitation

Rainfall

Output Resolution

0.1mm/min

Barometric Pressure

Range

Accuracy

600-1100 hPa

±1 hPa @ -52 to +60 °C

Air Temperature

Range

Accuracy @ +20 °C

-52 to +60 °C

±0.3 °C

Relative Humidity

Measurement range

Accuracy

0-100 %RH

±3 %RH (0-90 %RH); ±5 %RH (90-100

%RH)

http://www.metone.com/

http://www.vaisala.com/

MRK-D-0014, V1.0 Page | 40


10.2. Gill WindSonic Description: 2-axis ultrasonic wind sensor, measures wind speed and

direction

Specifications: For full details visit the company website www.gill.co.uk

Wind Speed

Range 0-60 m/s

Accuracy ±2⁰ @ 12 m/s

Resolution 0.01 m/s

Wind Direction

Range 0-359° (no dead band)

Accuracy ±3⁰ @ 12 m/s

Resolution 1 °

10.3. Cirrus MK427 Noise Sensor

Description: Outdoor environmental noise meter:

Specifications: For full details visit the website www.cirrus-environmental.

com/

10.4. Novalynx 240-200SZ Silicon Pyranometer Description: Outdoor environmental solar radiation meter:

Specifications: For full details visit the website www.novalynx.com/

Frequency Weighting dB(A) to IEC 61672-1:2002

Automatic Calibration Electrostatic Actuator System

with DC voltage control

Measurement Range 30 – 100dB(A)

Resolution 0.1 dBA

Sensor High stability silicon voltaic detector

Accuracy ± 5% typical under natural daylight conditions

Sensitivity 100 µA per 1000 W/m² typical

Linearity Max deviation of 1% up to 3000 W/m²

Resolution 0.1 W/m2

Temperature

dependence 0.15% per °C max

Operating

temperature -40°C to +65°C (-40°F to +149°F)

http://www.gill.co.uk/

http://www.novalynx.com/

MRK-D-0014, V1.0 Page | 41


Mounting and Site Positioning Guidelines It is important that the positioning of the Dust Sentry is suitable so as to yield data which is

representative of that specific location.

11.1. Mounting The Dust Sentry comes with 2x mounting brackets and 3x U-bolts for 2 inch poles. The same

brackets are used for both pole and wall mounting. To wall mount the Dust Sentry the brackets are

screwed into the wall instead of using the U-bolts.

For pole mounting:

1. Secure top mounting bracket at a suitable height using 2x U-bolts provided

2. Fix lower mounting bracket to the Dust Sentry chassis with screws

3. Hang the Dust Sentry on the top mounting bracket

4. Place U-bolt through lower mounting bracket

Note: Only one U-bolt is used to secure the bottom bracket

5. Add nuts and washers and tighten the bottom U-bolt into position

11.2. Inlet height If PM monitoring is related to human exposure, the sampling inlet height should be positioned

in the “breathing zone”. This is located between 2 and 15 meters above ground level.

If PM monitoring is related to specific emission sources, the position of the sampling inlet can

be more flexible. It is more important that there is no obstruction between the approaching air

from the emission source and the sampling inlet.

If more than one Dust Sentry, or any other particulate instrument, is being used at the site, the

height of the inlets should be uniform.

If the Dust Sentry inlet is the highest point at the site, a lightning rod must be installed to

prevent damage to the unit during electrical storms.

11.3. Measurement Interference The meteorological conditions of the site should be taken into consideration when positioning

the Dust Sentry. For example, there should be no obstruction to the air flow in the

predominant wind direction. A minimum clear sky angle of 120 degrees is recommended.

1

.

2. 3.

4. 5.

MRK-D-0014, V1.0 Page | 42


The inlet should be at least 1 meter away from any objects that could potentially influence the

airflow characteristics e.g. trees, vertical surfaces or walls.

Avoid overhead high-voltage cables which may cause electrical interference with the

sampling equipment.

Demolition/construction activities and change to normal transport patterns due to road works

etc. can significantly affect the data. Ensure a record of such events is kept to account for

unexpected peaks in concentration.

11.4. Safety The intended data capture rate should be considered when positioning the Dust Sentry. If

data capture above 90% is essential, the unit should be located in an area which has 24 hour

access available.

The positioning should allow for routine maintenance checks to be performed safely by

personnel.

If using a tripod, ensure the tripod legs are bolted to the ground to prevent the unit from

falling. Ensure the Dust Sentry is in a secure location to avoid vandalism or theft.

MRK-D-0014, V1.0 Page | 43


Appendix

12.1. Warranty

Please review the Aeroqual Warranty Policy on our website at www.aeroqual.com

12.2. Technical Support Technical information, service and spare parts are available through your distributor. In addition,

worldwide technical support is available from Aeroqual Ltd. Please contact Aeroqual Technical Support

by email: [email protected]. This will generate an automatic ticket and your enquiry will be

addressed as quickly as possible by a qualified service person.

Aeroqual Limited

109 Valley Road, Mt Eden, Auckland 1024, New Zealand

Phone: +64 9 623 3013

Fax: +64 9 623 3012

Email: [email protected]

12.3. Declarations Copyright Aeroqual Limited. All rights reserved. Reproduction, transfer, distribution or storage of part

or all of the contents of this document in any form 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.

Aeroqual operates a policy of continuous development. Aeroqual reserves the right to make changes

and improvements to any of the products described in this document without prior notice.

Under no circumstances shall Aeroqual be responsible for any loss of data or income or any special,

incidental, consequential or indirect damages howsoever caused.

The contents of this document are provided "as is". Except as required by applicable law, no

warranties of any kind, either express or implied, including, but not limited to, the implied warranties of

merchantability and fitness for a particular purpose, are made in relation to the accuracy, reliability or

contents of this document.

Aeroqual reserves the right to revise this document or withdraw it at any time without prior notice. The availability of particular products may vary by region. Please check with the Aeroqual dealer nearest to you.

© Aeroqual Limited 2015. All rights reserved.

1. The Aeroqual Dust Sentry complies with EN 61000-6-1:2001 2. The Aeroqual Dust Sentry complies with EN 61000-6-3:2001 3. The Aeroqual Dust Sentry 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 interference that may cause undesired operation.

4. The Aeroqual Dust Sentry has achieved MCERTs certification for indicative ambient particulate monitor

http://www.aeroqual.com/



MRK-D-0014, V1.0 Page | 44


USE SENSIBLY Use the Aeroqual DUST SENTRY instrument only as per this user guide.

USE AEROQUAL APPROVED SERVICE

Only approved service personnel must work on this product.

ACCESSORIES

Use only approved accessories. Do not connect incompatible products.

CONNECTING TO OTHER DEVICES

When connecting to any other device, read the appropriate user guide for detailed safety

instructions. Do not connect incompatible products.

Documents

MRK-D-0014, V1.0 Page | 1 Aeroqual Dust Sentry User Guide · OFF OFF ON OFF Wind Sonic with RS232 communication + Cirrus MK427 Noise ON OFF ON OFF Cirrus MK427 Noise module only