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Alphasense OPC-R1 Скачать руководство пользователя страница 2

072-0500

Alphasense User Manual

OPC-R1 Optical Particle Counter

Issue 1

Alphasense Ltd

Page 2 of 33

February 2019

Sensor Technology House, 300 Avenue West, Skyline 120, Great Notley. Essex.CM77 7AA. UK

Tel: +44 (0) 1376 556700 - Fax: +44 (0) 1376 335899

Email: [email protected] - Web: www.alphasense.com

1

Quick Start

The purpose of this manual is to explain how to set up, install and use the Alphasense Optical
Particle Counter OPC-R1 for measuring PM

1

, PM

2.5

and PM

10

, as well as measuring particle size

distributions in real time. Note it is also possible to set the unit up to measure PM

4.25

.

When  using this OPC for  the first  time  we  recommend  that you  use  the  Alphasense  SPI  adapter.
This  will  enable  you  to  very  quickly use  the OPC  at  your  desk by  running  it off  a Windows  PC  or
laptop using the Alphasense software.  Apple and Unix compatible software are not available.

Initially a full deployment package will have been provided with the OPC-R1.  In the future this will
be available via the web site or through contact with Alphasense.

Full  instructions for  carrying  out  the  installation,  (specifically  a driver  must be  installed for the  SPI
adapter) and for the use of the software are in Appendix  B and section 9.  Please note the driver
and the SPI adapter are the same as that used for the OPC-N2 and N3.

You  can  view  the  data  options  along  with  the  data  resolution  and  range  when  the  OPC-R1  is
connected  to  a  PC  running  the  Alphasense-supplied  software.    Please  note  that  is  not  the  same
software  that  runs  the  OPC-N2  or  the  OPC-N3.    This  also  provides  a  useful  reference  to  those
customers who wish to develop their own software.

The  OPC-R1,  unlike  the  OPC-N2  and  N3,  does  not  have  a  standalone  mode  where  the  data  is
stored directly on an onboard SD card.

Temperature  and  humidity  sensors  are  fitted  as  standard  on  the  OPC-R1.    Temperature  and
humidity compensation is not currently carried out but this will be offered in the future.

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Содержание OPC-R1

Страница 1: ...on 3 Health and Safety and Regulatory Information 4 How the OPC R1 works 5 PM Measurement 6 Sampling the environment Connecting and running the OPC 7 Connecting Power and Taking Readings 8 Running the...

Страница 2: ...e Initially a full deployment package will have been provided with the OPC R1 In the future this will be available via the web site or through contact with Alphasense Full instructions for carrying ou...

Страница 3: ...of software bins 16 Sampling interval seconds Histogram period recommended 1 to 30 Sample flow rate mL min 240 Max particle count rate Particles second 10 000 Detection limits PM10 Minimum Maximum el...

Страница 4: ...particle size spectra and concentration data assuming a particle density and refractive index RI Default settings weighting index 2 are density 1 65 g ml RI 1 5 i0 Respiratory profiles are included i...

Страница 5: ...le the smallest carbon particles will have a higher density than larger aggregates of the same particles different Particle Density values may be set for different bins to achieve a more accurate dete...

Страница 6: ...this must be ordered separately The green LED shows that power is supplied to the OPC R1 and the red LED flashes when the PC and OPC R1 are communicating SPI Connection The SPI socket is a Molex Pico...

Страница 7: ...eir own risk 9 The SS connection to the OPC should be driven LOW during any SPI communication with the OPC OPC SPI Commands A full list of current SPI commands given in 072 0501 Supplemental SPI infor...

Страница 8: ...king the laser and fan boxes turns the lasers and fan on Note that changing the laser power will alter the unit s response and will put the unit out of calibration Fan speed cannot be varied on the OP...

Страница 9: ...y are also given Reject Glitch and RejectLong TOF are an indication of the electronic noise and errors in timing respectively High values would suggest a problem with the unit or the set up The total...

Страница 10: ...ion vs Particle Size display mode Click the Histogram ml button on the left hand side of the screen to show the recorded data in particle number concentration particles per millilitre of sampled air f...

Страница 11: ...Web www alphasense com History Plot of Mass Concentration display mode Click the Histogram plot mass conc Button on the left hand side of the screen to show a temporal record of PM1 PM2 5 and PM10 val...

Страница 12: ...settings through the OPC software 1 Ctrl R Read and display all configuration variables This will display the variables available to the user for edit The data is displayed in the information window t...

Страница 13: ...Particle Counter Issue 1 Alphasense Ltd Page 13 of 33 February 2019 Sensor Technology House 300 Avenue West Skyline 120 Great Notley Essex CM77 7AA UK Tel 44 0 1376 556700 Fax 44 0 1376 335899 Email...

Страница 14: ...icle diameter um 0 55 0 9 1 3 1 7 12 2 Vol of a particle in bin um3 0 087 0 382 1 150 2 572 950 8 Weighting for bin 1 65 1 65 1 65 1 65 1 65 Individual bin weighting Data OADate Time Bin00 Bin15 Mean...

Страница 15: ...system to control the device and gather data A flow chart outlining simple operation of the OPC R1 is given in 072 0501 Supplemental SPI information for OPC R1 The R1 has a very low power off state u...

Страница 16: ...pected to fall to below 10 C the system should be heated or well insulated to ensure correct operation of the OPC How are the units calibrated The units are calibrated for sizing using controlled aero...

Страница 17: ...this time only option and click next The following window will give you an option as to whether to use a CD to install the device driver or to use another location Select Install from a list or a spe...

Страница 18: ...ail sensors alphasense com Web www alphasense com Windows 7 Copy the folder OPC Interface Software to the PC desktop Connect the USB interface lead to the PC If the USB interface lead USB to SPI conve...

Страница 19: ...e 120 Great Notley Essex CM77 7AA UK Tel 44 0 1376 556700 Fax 44 0 1376 335899 Email sensors alphasense com Web www alphasense com Right click the icon and select Update Driver Software Select the Bro...

Страница 20: ...elect the Install this driver software anyway option Windows will then install the driver files for the device Once the device driver software has been installed the form below will be displayed Make...

Страница 21: ...s include an electronic fingerprint that indicates which company produced the driver as well as an indication as to whether the driver has been modified since the company released it This increases se...

Страница 22: ...Tel 44 0 1376 556700 Fax 44 0 1376 335899 Email sensors alphasense com Web www alphasense com Then click on the Recovery option on the left hand side Once selected you will see an advanced startup se...

Страница 23: ...oot time configuration settings you will need to restart your Computer one last time Finally you will be given a list of startup settings that you can change The one we are looking for is Disable driv...

Страница 24: ...com Web www alphasense com To disable the signature verification it is necessary to get into Troubleshooting options from the boot manager Select Restart from the power options menu for Windows 8 thi...

Страница 25: ...nce we are modifying boot time configuration settings you will need to restart your Computer one last time Finally you will be given a list of startup settings that you can change The one we are looki...

Страница 26: ...the laser setting and ToF to SFR factor before updating the firmware as this may be reset to default once updated To upgrade the firmware on your OPC R1 device requires Bootloader tool Alphasense USB...

Страница 27: ...ands OPC R1 SPI functions from point of view of SPI Master system for firmware versions 2 01 2 21 Function Command byte Byte s out Byte s in 0xF3 is set as standard initial return byte value from OPC...

Страница 28: ...0x3F InfoStr ascii char07 F 0x46 0x3F InfoStr ascii char08 i 0x69 0x3F InfoStr ascii char09 r 0x72 0x3F InfoStr ascii char10 m 0x6D 0x3F InfoStr ascii char11 w 0x77 0x3F InfoStr ascii char12 a 0x61 0x...

Страница 29: ...at 10 ms be used as delay between command byte and following byte 0x12 0xF3 0x12 FirmwareVerMajor FirmwareVerMajor is unsigned 8bit integer variable 0x12 FirmwareVerMinor FirmwareVerMinor is unsigned...

Страница 30: ...te0 Sampling Period is a float variable occupying 4 bytes and is a 0x30 Sampling Period Byte1 measure of the histogram s actual sampling period in seconds 0x30 Sampling Period Byte2 0x30 Sampling Peri...

Страница 31: ...cupying 4 bytes Units are ug m3 0x32 PM_B Byte1 0x32 PM_B Byte2 0x32 PM_B Byte3 0x32 PM_C Byte0 PM_C is a float variable occupying 4 bytes Units are ug m3 0x32 PM_C Byte1 0x32 PM_C Byte2 0x32 PM_C Byt...

Страница 32: ...iginal command byte value sent for the command to be validated by the OPC R1 If it is not the OPC R1 will load the SPI buffer with 0x31 busy value and return to its normal mode of operation THE SAMPLI...

Страница 33: ...ation is a 16 bit method similar to that used in MODBUS communication It uses the generator polynomial value 0xA001 and is initialised to 0xFFFF Example C programming code showing how the checksum can...

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