Turn Key DustMate User manual

Turnkey Instruments Ltd
Dustmate
Operating Instructions
www.environst.com
[email protected]
01904 373018

Dustmate
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DUSTMATE KEYPAD QUICK REFERENCE
KEY-PRESS FUNCTION
[ON]
[RESET]
to switch on
to quit editing
to see battery condition & location
[EDIT]
[ENTER]
to select the DUSTMATE Editor
to select an operation or confirm a response
to enter the changes made during editing
[START]
[STOP]
to start or stop sampling
to clear memory
to review stored results
to clear a value during editing
[]to increase a value
to say YES
[]to decrease a value
to say NO
[NEXT] to go to the next item or display

Operating Instructions
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CONTENTS
Dustmate and AirQ for Windows 4
Installation of AirQ 5
Getting Started with DUSTMATE 6
DUSTMATE Editor 8
Editing with AirQ 16
DUSTMATE Sampling Mode 17
Remote Sampling with AirQ 19
Sampling with DUSTMATE - How does it work? 20
Uploading stored results 23
Using the Bar Code Wand ??
Maintenance 24
Appendix A - Tables of recording times 28
Appendix B - Technical Specification 29
Appendix C - Particle Size Conventions 30

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DUSTMATE AND AIRQ FOR WINDOWS
The DUSTMATE environmental monitor can be supplied with AirQ32 for Windows
software. This enables results stored in the DUSTMATE memory to be uploaded into
your PC when you have completed sampling. Additionally your PC can be used to
control and collect results from the DUSTMATE sensor in real time.
AirQ is designed to collect, manage and display data from a range of environment
sensors, either as individual sensors or in real-time when connected to a sensor
network. The sensors can be used to measure a whole range of environmental
quantities such as PM10 particles, airborne fibres, VOCs and pollutant gases.
AirQ is provided with extensive on-line help with hypertext links, clicking an
on-screen button with a blue question mark will automatically open the relevant
help page.

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INSTALLATION OF AIR32Q
The program is supplied on CD and requires Windows 95 or above to operate. An
un-installer is provided with the program. Approximately 20 MB of free disk space is
required on drive C: to complete the installation
To install in Windows: Insert the CD it should launch automatically if not run
setup.exe, then follow the on-screen instructions.
AirQ32 will be installed in C:\Airq32. Sample results which can be imported, if
required, are to be found in C:\Airq32\Examples.

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GETTING STARTED WITH DUSTMATE
Before starting connect a fully charged battery pack via the 6 pin
DIN connector
SWITCHING ON: To turn the instrument on, press and release the switched
marked [ON]. After a short self test (see below) the display will show
"DUSTMATE ready", together with the time and date. If the battery
needs re-charging, the display will show “DUSTMATE paused” and
continuously flash "Charge battery".
The battery must be fully re-charged as soon the "Charge battery"
warning appears.
SWITCHING OFF: Providing the instrument is not sampling it will switch itself off
automatically if no buttons have been pressed for 4 minutes. To manually
switch off the instrument press []and []together. The DUSTMATE will
not switch off while on-line to AirQ.
DISPLAY CONTRAST: To adjust the contrast of the display press and hold [RESET]
as the instrument is switched-on until the display goes black after about
3 seconds. Then use the []or []buttons to darken or lighten the
display respectively. Press [ENTER] when the required contrast is obtained.
DUSTMATE will automatically remember this setting and use it each time
it is switched-on. The contrast can only be adjusted as you switch the
instrument on, and once set to suit you it should not normally need re-
adjusting.
SELF TEST: As DUSTMATE is switched on it carries out certain self tests to make
sure it is working correctly. At the end of the self test the display will show
"Last Serviced at", this is the time and date when the instrument was
serviced. If this is more than a year ago, the display will show "PLEASE
HAVE ME FACTORY SERVICED" instead.

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If the instrument detects a fault with its memory during the self test the
display will show "MEMORY ERROR".
If the instrument has a potential fault the display will show
"INSTRUMENT FAULT".
In both of the above cases, the instrument will automatically revert to its
default settings and may still usable - albeit with reduced accuracy. After
the error message, the display will show "PLEASE HAVE ME FACTORY
SERVICED". In this case please contact the factory as soon as possible.
MEMORY: If you press [RESET] while the display shows "DUSTMATE ready" or
during sampling, the display will switch to indicating the battery voltage,
internal case temperature and the percentage of memory used. Release
[RESET] to revert to the normal display. During dust sampling, when
[RESET] is released, the display will first show the sample number and
instrument location.
The fully charged battery voltage is about 6.4 volts (charger disconnected).
It is suggested that the battery is recharged if its voltage drops below
5.9 volts. Sampling will cease automatically and the display will indicate
“DUSTMATE paused” if the battery drops below about 5.8 volts.
Sampling will also cease if the case temperature exceeds 50 C.
As the percentage of memory used approaches 100% you should cease
sampling soon as possible and transfer your results to a PC. There is some
leeway here, for the memory is only truly full when the indicator shows
120%. Sampling will cease automatically and the display will indicate
“DUSTMATE paused” if the end of the memory is reached.
The battery charger should be connected to the 8 pin DIN connector on
the battery pack. When the battery charger is connected, the battery
voltage will eventually rise to about 7.25 volts. The battery pack can be
charged without the instrument.

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DUSTMATE EDITOR
The DUSTMATE Editor allows some of the instrument settings and parameters to be
changed. To select the editor press [EDIT] while the display shows "DUSTMATE
ready" or during dust sampling, then use [NEXT] to select what to edit followed by
[ENTER] to select. Note that during dust sampling the number of items which can
be edited is restricted.
When your instrument is connected to your PC, the settings and parameters can also
be changed via the AirQ Configuration Window. Please refer to the next section for
details.
Set Dust Alarm: allows you to set the dust concentration at which the alarm will
operate. Only available when the alarm is enabled. The alarm operates
on the average reading on the Total Particles (Inhalable) channel during
the display interval and is expressed as a percentage of the instrument’s
alarm scale.
On the microgram range the alarm scale is 1000 micrograms, so a
01.00% alarm (default) corresponds to 10 micrograms per cubic meter
dust concentration.
On the milligram range the alarm scale is 10 milligrams, so a 01.00% alarm
corresponds to 0.1 milligrams per cubic meter dust concentration.
The default alarm setting is 01.00% of scale. Press []or []to change
the flashing digit then [NEXT] to move on to the next digit position. Press
[ENTER] to quit and save the revised entry. Press [RESET] to quit without
saving. Press [START] to reset the calibration factor to 1.00.
Zeroing Interval: allows the user to select the time intervals when autozeros
will carried out. The range is 0 hour to 240 hours. The instrument
automatically zero itself when starting to sample and thereafter "on-the-
hour" at the interval shown on the LCD. If the interval is set to 0 hours, no
further zeroes are carried out. Autozeros last for about 5 seconds during

Operating Instructions
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which time the pump is switched off. The default interval is 1 hour. The
previous reading is held during autozeros.
Press (and hold to speed up) []or []to change the interval then press
[ENTER] to save the revised value.
Results Display: allows the user to select which results will be displayed on the
LCD during sampling. The selection can be changed during sampling. The
available options are:
Backlighting: select YES to turn on the display backlight for viewing in
poor light. The extra power used will reduce the total sampling time on
internal batteries by about 30%. Note backlighting can also be controlled
via AirQ.
Display Cycling: select YES if you want the display to automatically
scan around the available results channels. If you select NO then, during
sampling, the results channel shown on the LCD can be changed manually
using [NEXT].
Latest Dust: select YES if you want the display to show the latest particle
concentration. This will be the time weighted average over the Display
Refresh interval.
Average Dust: select YES if you want the display to show the average
particle concentration since the sampling started. Note that average results
are only available after the first results have been saved in memory (i.e.
after the storage interval).
Display Refresh: allows the user to select the time interval at which results display
is updated. The range is 1 second to 240 seconds. The value displayed on
the LCD will be the average reading taken over this interval. Press (and
hold to speed up) []or []to change the interval then press [ENTER] to
save the revised value.

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Filter & AirFlow: pressing [ENTER] shows the time and date the filter was last
changed, and the sampling time in minutes it has been used up to a
maximum of 65536 minutes (45.5 days).
Press [RESET] to display the total mass of dust the instrument (based
on its current calibration factor and a flowrate of 600ml/min) thinks it
has accumulated (over all samples) on its filter. This is a useful aid
to calibration.
Press [RESET] to display the total operating time of the pump in hours.
Press [RESET] again and you are prompted to change the filter, press
[ENTER] followed by the password [START] [START] [START] to do
so. The filter timer and filter mass accumulator (but not the pump time
accumulator) will be automatically reset at this time.
If you do not wish to change the filter, just press [RESET].
You will then be prompted to set the sample airflow to its correct value.
Connect a 4 mm OD plastic tube and flow meter to the inlet Luer fitting
on top of the instrument. The correct sample flow during is 600 cc/min.
Use [] or [] to change then [ENTER] to save the new value.
Adjust Clock: allows the time to be changed to compensate for daylight saving. On
selection, the minutes value will flash to indicate it can be adjusted, use
[]or []to change then [ENTER] to save the new value, the hours value
will then flash and can be adjusted likewise. The date can only be changed
at the factory.
The time and date are set by AirQ to the PC time when on-line
sampling starts.
Autostop Counter: allows the duration of the sample to be set. If set to zero, the
instrument will sample until stopped manually. The instrument will cease
sampling after the indicated number of saves to memory (i.e. the sample

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duration will be Autostop Count times Storage Interval). Use []or []to
change then [ENTER] to save the new value. If Auto Restart is ON, the
instrument will automatically start a new sample of the same duration.
Storage Interval: allows the user to select the intervals in time at which results
are stored in memory. The range is 1 minute to 60 minutes if Save in
Seconds is OFF, 1 to 240 seconds if ON The value stored is the average
reading taken over the storage interval.
Press (and hold to speed up) []or []to change the interval then press
[ENTER] to save the revised value. The storage interval cannot be changed
when sampling.
Mass Calibration: allows you to change the calibration factor for each of the size
fractions in terms of mass concentration per volume of air. This calibration
cannot be altered while the instrument is sampling dust.
The default setting is 01.00, allowing an adjustment range of 990%. For a
given dust, the calibration factor is equal to the gravimetric mass obtained
from a filter weighing divided by the DUSTMATE Mean reading taken over
the same period.
Press []or []to change the flashing digit then [NEXT] to move on
to the next digit position. Press [ENTER] to quit and save the revised
entry. Press [RESET] to quit without saving. Press [START] to reset the
calibration factor to 1.00.
DUSTMATE Setup: the instrument is provided with several settings which can
changed by the user . Press []to say YES to a particular setting, []to
say NO. Then press [ENTER] to save the revised entry and move on to the
next. Press [RESET] to return to the editor.
Differential Mode: select YES to allow the instrument to measure
differences between TSP and PM2.5, or PM10 and PM2.5. This option
is only available when memory has been cleared. AirQ will

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automatically sense if the mode has changed and upload the new settings
describing the differential channels PM10-PM2.5 and TSP-PM2.5 etc.
Workplace Mode: select YES to measure and record the workplace size
fractions of Inhalable, Thoracic and Respirable. NO to measure and record
the environmental size fractions of Total Particles (TSP), PM10, PM2.5
and PM1. The option to change modes is only available after the sample
memory has been cleared. See How Does it Work? and Appendix C for
additional information on size selection and measurement ranges.
Total Particles: select YES to allow the instrument to measure and record
the particle concentration during sampling based on all the particles
physically entering the inlet without additional electronic selection.
Environmental mode only.
Measure in µg/m3:select YES to cause the instrument to measure and
record the total particle concentration in micrograms per cubic metre
with a resolution of 0.1 up to a maximum of 6000 600 µg/m3. Otherwise
results are measured in milligrams per cubic metre with no electronic size
selection (i.e. PM10, PM2.5 and PM1 not available) up to a maximum of
about 60 mg/m3.
PM10 Particles: select YES to allow the instrument to measure and record
PM10 particles electronically selected from those physically entering the
inlet. Environmental mode only.
Measure in µg/m3:select YES to cause the instrument to measure and
record the PM10 particle concentration in micrograms per cubic metre
with a resolution of 0.1 up to a maximum of 6000 600 µg/m3. Otherwise
results are measured as number > 10 micron per cubic centimetre.
PM2.5 Particles: select YES to allow the instrument to measure and
record PM2.5 particles electronically selected from those physically entering
the inlet. Environmental mode only.

Operating Instructions
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Measure in µg/m3:select YES to cause the instrument to measure and
record the PM2.5 particle concentration in micrograms per cubic metre
with a resolution of 0.01 up to a maximum of 600 600 µg/m3. Otherwise
results are measured as number > 2.5 micron per cubic centimetre.
PM1 Particles: select YES to allow the instrument to measure and record
PM1 particles electronically selected from those physically entering the
inlet. Environmental mode only.
Measure in µg/m3:select YES to cause the instrument to measure and
record the PM1 particle concentration in micrograms per cubic metre with
a resolution of 0.01 up to a maximum of 600 µg/m3. Otherwise results are
measured as number > 1 micron per cubic centimetre.
Inhalable Particles: select YES to allow the instrument to measure and
record the particle concentration according to the Inhalable Convention
electronically selected from those physically entering the inlet. Workplace
mode only.
Measure in µg/m3:select YES to cause the instrument to measure and
record the Inhalable particle concentration in micrograms per cubic metre
with a resolution of 0.1 up to a maximum of 6000 600 µg/m3. Otherwise
results are measured in milligrams per cubic metre with no electronic size
selection up to a maximum of about 60 mg/m3.
Thoracic Particles: select YES to allow the instrument to measure and
record Thoracic Convention particles electronically selected from those
physically entering the inlet. Workplace mode only.
Measure in µg/m3:select YES to cause the instrument to measure and
record the Thoracic particle concentration in micrograms per cubic metre
with a resolution of 0.1 up to a maximum of 6000 µg/m3. Otherwise
results are measured as number >10 micron per cubic centimetre.

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Respirable Particles: select YES to allow the instrument to measure and
record Respirable Convention particles electronically selected from those
physically entering the inlet. Environmental mode only.
Measure in µg/m3:select YES to cause the instrument to measure and
record the Respirable particle concentration in micrograms per cubic metre
with a resolution of 0.1 up to a maximum of 6000 µg/m3. Otherwise
results are measured as number > 4 micron per cubic centimetre.
PM2 Particles: select YES to allow the instrument to measure and record
PM2 particles electronically selected from those physically entering the
inlet. Workplace mode only.
Measure in µg/m3:select YES to cause the instrument to measure and
record the PM2 particle concentration in micrograms per cubic metre with
a resolution of 0.01 up to a maximum of 600 µg/m3. Otherwise results are
measured as number> 2 micron per cubic centimetre.
Save in Seconds: select YES for the instrument to save to memory in
multiples of one second, NO to save in multiples of one minute. Note
memory capacity will be used very quickly if one second storage is used.
You cannot use multiples of one second when sampling on-line with AirQ
for the program will always reset it to multiples of one minute. However,
you can upload to AirQ off-line samples stored in multiples of one second.
Password Protect: select YES to force a password to be required to
access the DUSTMATE Editor or the Sampling Mode. The entry password
is [START] [ENTER] [ENTER] [NEXT], a * will appear on the display
as each key is pressed. Prevents un-authorised tampering with the
instrument settings.
Auto Restart: select YES for the instrument to restart sampling
automatically after recovery from a low battery voltage, over temperature
or Autostop countdown. A low battery voltage will cause the sampling to
pause. Note if the battery voltage drops too low the instrument will close

Operating Instructions
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down completely and must be restarted manually.
Also used in conjunction with the bar code wand accessory to stop
and start a new sample when a new location bar code is scanned into
the instrument.
Alarms Enabled: select YES to cause the alarm to activate when the dust
concentration exceeds the specified alarm level. Select NO to disable the
alarm. The integration time for the alarm output is equal to the display
refresh interval. The Dust Alarm Level can only be adjusted when the
alarm is enabled. When the alarm is triggered the instrument will beep at
half second intervals.
Location ID: allows the user to change the named location of the instrument. Up
to 16 alphanumeric characters can be entered. Press (and hold to speed
up) []or []to change the flashing character then [NEXT] to move on
to the next character position. Press [ENTER] to quit and save the revised
entry. Press [RESET] to quit without saving. Press [START] to clear the
whole entry to underscores
Operator ID: allows the user to change the name identification of the instrument
operator. The characters are edited in the same fashion as Location above.
.

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EDITING WITH AIRQ
From the AirQ Configuration Window the following DUSTMATE sensor settings and
parameters can be altered.
Location: with AirQ the operator is always “Remote Control”
Refresh Time: the DUSTMATE storage interval.
Alarms ON at: the DUSTMATE alarm level as % of alarm range
Dust Calibration: the DUSTMATE calibration factors
Measure TSP/Inhalable: set DUSTMATE to measure TSP/Inhalable
Measure PM10/Thoracic: set DUSTMATE to measure PM10/Thoracic
Measure PM2.5/Respirable: set DUSTMATE to measure PM2.5/Resp.
Measure PM1/PM2: set DUSTMATE to measure PM1/PM2.
Micrograms/mtr3: set DUSTMATE to measure in micrograms/mtr3
Alarms Enabled: set the alarm to operate if exceeded.
AirQ Controlling: allow AirQ to control the alarm, not DUSTMATE
Password Protect: password required for DUSTMATE keypad.
Note you cannot change in or out of Workplace Mode using AirQ, but it will sense
which mode you are in and get the appropriate descriptions from the sensor. Please
refer to the AirQ online help for further information.

Operating Instructions
17
DUSTMATE SAMPLING MODE
The Sampling Mode allows you to manually tell DUSTMATE to start or stop sampling
and to review the sample results stored in its memory. To select the Sampling Mode
press [START] when the display shows "DUSTMATE ready". You will then be
prompted with various questions:
RESET MEMORY ?: Select YES if you wish to set the instrument memory back
to the beginning and the sample number back to 1. You must do this
before changing to or from Workplace Mode. Make sure you have
uploaded all the results you wish to keep before doing this as they will be
lost irretrievably when the memory reset. Press [ENTER] to execute the
selection. As a precaution, if you have said YES, the instrument will prompt
you with:
ARE YOU SURE ?: select YES to confirm the memory reset and then [ENTER].
START SAMPLE nn: where nn is the identification number (between 1 and 85) of
the sample you are about to start. It will be Sample 1 if you have just reset
the memory. Select YES if you wish to start sampling and press [ENTER] to
execute. The pump will turn on and dust sampling will commence and the
display will show “…sampling…”. If display cycling is not selected, use
[NEXT] to step through the results channels. If you select NO the review
results option appears (providing some results are already in memory).
REVIEW RESULTS: select YES if you wish to review the results saved so far,
then [ENTER] to execute. The review will show on the LCD. For each
completed sample, the sample identification number, its start and stop
time, its location and the mean dust concentration over the sampling
period will be displayed. Press [NEXT] to move on to the next sample.
Press [RESET] to quit.
You can also select the Sampling Mode whilst DUSTMATE is sampling. In this case
only one option is available:

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STOP SAMPLE nn: where nn is the identification number (between 1 and 85) of the
dust sample currently being taken. Select YES if you wish to stop sampling
and press [ENTER] to execute. The pump will stop and dust sampling will
cease. Providing the sampling duration was long enough to have saved
results in memory, when you next start sampling the sample identification
number will automatically increase by one. If no results were saved, the
sample number will not change. If Sample 85 is reached you will be invited
to reset the memory to Sample 1.
The present time and date, the time the sample started and the sample number
can also all be displayed on the LCD whilst DUSTMATE is sampling by pressing and
releasing [RESET]. Note that the time the sample started is recorded as when the
first result is stored.

Operating Instructions
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REMOTE SAMPLING WITH AIRQ
AirQ can be used to start and stop sampling and continually gather results remotely
when the DUSTMATE is connected to a PC. Please refer to the AirQ on line help for
instructions on how to do this.
Note that if the sampling is started in this way, the operator will automatically be
called “Remote Control”. In addition the internal memory of the DUSTMATE will not
be used (and the internal sample number will not be incremented) as the results are
continually being transferred to the PC.
If the PC looses communications with DUSTMATE for more than about 4 minutes,
DUSTMATE will automatically cease sampling and restart a new sample using its
next internal sample number with results being stored in its internal memory for
uploading later to the PC. In other words just like the manual sampling mode
described in the previous section.
If communications are subsequently recovered, AirQ will attempt to start a new on-
line sample and, if successful, results from this new on-line sample will not be stored
internally in the DUSTMATE memory. The measurements taken when the DUSTMATE
was off-line will, however, be retained and should be uploaded to the PC if required.
This can be done even when the sensor is sampling on-line. Do not select Auto
Restart in the Dustmate Setup menu if you are sampling on-line with AirQ, it will
prevent AirQ taking proper control of the sensor. When you start sampling on-line
the DUSTMATE clock is automatically synchronised with that of your PC.

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SAMPLING WITH DUSTMATE – HOW DOES IT WORK?
Do not sample with the instrument if the ambient temperature is above 40 C, or if the instrument is in
direct sun such that the case temperature will rise above 40 C. Doing so will shorten the life of the laser
and invalidate the product warranty. The instrument will automatically pause sampling and turn the laser
off if the case temperature exceeds 50 C.
DUSTMATE uses a light scattering technique to determine the concentration of
airborne particles and dust in the size range from about 0.4 microns (1 micron = 10-6
metre) to about 20 microns in diameter. Above 20 microns, all particles are sized as
20 microns.
The air sample is continuously drawn into the instrument by a pump with a flow rate
set by the microprocessor at 10 cc per second (600 cc/min). The incoming dusty air
passes through a laser beam in a photometer and then through a filter to remove the
particles before reaching the pump.
On the microgram per cubic metre ranges, the instrument sizes individual particles
as they pass thorough the laser beam. Over 20,000 particles a second can be sized
before coincidence (two particles in the beam at once) effects occur. This typically
corresponds to a concentration of much greater than 6000 micrograms per cubic
metre.
The light scattered by the individual particles of dust is converted into a electrical
pulse which is proportional the size of the particle. A unique feature of the Turnkey
photometer is that only light scattered through very narrow angles is measured. This
narrow angle scatter is virtually the same for black or white particles of the same
size. That is, it doesn’t depend on the material composition of the particle; on the
other hand, the easier to measure right angle scatter is highly dependant on material
composition.
The intensity of the light pulse is therefore an indicator of particle size and from
this the microprocessor is able to calculate the expected mass of the particle. It
actually assumes the material density of the particle is 1.5 and this is where the mass
calibration factor comes in to play. However, for most airborne dusts a density of 1.5