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 C-12-9800   Rev A 

Page 35 

Audit-Only Flow Checks

: see Section 7.4.2.  No flow calibrations are changed if the ZERO and 

CALIBRATE softkeys are not pressed. 

7.4.2  Flow Audits 

To audit any of the flow parameters, without making any calibration changes, enter the 
corresponding calibration menu and allow the reading to stabilize. Verify the value is correct and 
matches the flow standard.  Record the results and press ESC to exit to the Calibration menu. 
 

7.4.3  The CALIBRATE AUDIT Menu 

– Performing Optical Span Tests 

The CALIBRATE AUDIT menu is used to perform the optical span calibration verification test on 
the instrument using a neutral density filter. This will introduce a known and consistent amount of 
optical attenuation into the measurement system. The 83011 Span Check Filter tool will be 
required to perform this test. 

Note:

  No changes to the instrument calibration are made with this process. This is a span check 

only. 

Press the MENU key.  Highlight the CALIBRATE MENU item and select the ENTER key.  Scroll to 
the CALIBRATE AUDIT option and select the ENTER key again. 

When entering the CALIBRATE AUDIT menu, 
the Measurement Module should be in the 
OPEN position.  If it is not, or if the state is 
unknown, press the MOVE button (see Figure 
7-3) to open the measurement module and 
advance the tape one position. 

 

Figure 7-3 Entering the CALIBRATE AUDIT Menu 

Press the START button to advance to the Zero measurement.  Verify the filter tape is installed 
and press the CONTINUE softkey.  The measurement module will close, and the zero 
measurement will begin as shown in Figure 7-4. 

 

 

 

 

Figure 7-4 Performing the Zero Test 

Once the zero test is complete, the span test must be performed using the 83011 neutral density 
(ND) filter.  The measurement module will open, and the screen will display instructions to insert 
the ND Filter as shown in  Figure 7-5. 
 

 

VERIFY CALIBRATION 
 
 
   MOVE     START 

Содержание C-12

Страница 1: ...roduced transmitted transcribed stored in a retrieval system or translated into any other language in any form without the express written permission of Met One Instruments Inc C 12 BLACK CARBON MONITOR OPERATION MANUAL C 12 9800 REV A Met One Instruments Inc 1600 NW Washington Blvd Grants Pass OR 97526 Tel 541 471 7111 Fax 541 471 7116 www metone com ...

Страница 2: ...Page 2 C 12 9800 Rev A ...

Страница 3: ...ial Notes 13 3 7 1 Installing Filter Tape 14 3 7 2 Replacing Used Filter Tape 14 3 8 Starting and Stopping Sample Operation 15 3 8 1 Starting Initial Sample Operations 15 3 8 2 Stopping and Resuming Sample Operations 15 4 DOWNLOADING AND VIEWING DATA 16 4 1 Web Interface 16 4 1 1 How the Cloud Works 16 4 1 2 Data Retention 17 4 2 Comet Software 17 4 2 1 Comet Installation 18 4 2 2 Setting up a Clo...

Страница 4: ...Screen 29 7 MAINTENANCE AND TROUBLESHOOTING 30 7 1 C 12 Error and Alarm Event Descriptions 30 7 2 Basic Problem Causes Solutions Table 32 7 3 Suggested Periodic Maintenance Intervals 33 7 4 Flow Audit and Calibration 34 7 4 1 Flow Sensor Calibration 34 7 4 2 Flow Audits 35 7 4 3 The CALIBRATE AUDIT Menu Performing Optical Span Tests 35 7 5 Flow System Leak Checks 37 7 6 Factory Service Interval 37...

Страница 5: ...hnical Service representatives during normal business hours of 7 00 a m to 4 00 p m Pacific Time Monday through Friday In addition technical information and service bulletins are often posted on our website Please contact us and obtain a Return Authorization RA number before sending any equipment back to the factory This allows us to track and schedule service work and to expedite customer service...

Страница 6: ...is drawn into the instrument at a controlled flow rate The sampled air is subsequently drawn through a heated inlet section and then through special glass fiber filter tape capturing ambient particulate matter Optical transmission is measured through the filter tape allowing BC mass concentrations to be calculated The filter tape will advance when sufficient particulate matter has been deposited o...

Страница 7: ...ed with an external desktop power supply module with a 100 240 VAC 50 60 Hz input range and a 12 VDC 3 34 A output The C 12 instrument is housed in a weather proof case for deployment outdoors NOTE Use ONLY Factory Power Supply NO SUBSTITUTIONS 1 5 C 12 Instrument Specifications PARAMETER SPECIFICATION Measurement Principle Optical Absorption Wavelength 880 nm BC 370 nm UV optional Measurement Ran...

Страница 8: ...mage to the shipment is noticed before unpacking a claim must be filed with the commercial carrier immediately Follow any special unpacking instructions provided by the carrier as all items are carefully removed from the containers and each component inspected It is recommended to document and photograph all damaged packages and items before during and after unpacking them Contact Met One Instrume...

Страница 9: ...hould be equipped with an uninterruptable power supply UPS The supply must be rated for the electrical load and must be appropriately configured for an outdoor application Consult a qualified electrical contractor 3 3 Shelter Mounting Options The C 12 is a weatherproof monitor designed to be mounted on a stand and then deployed in the outdoors without the need for a shelter or other housing Howeve...

Страница 10: ...1 Insert the inlet tube Pull out the lanyard connected fitting from the inlet mount in the top radiation shield opening Insert the inlet tube 2 Connect the TSP Inlet to the inlet Slide the TSP inlet onto the top of the inlet Be certain the TSP inlet is fully seated onto the inlet 3 Apply power Plug in the AC power cable 4 Load filter tape Open the enclosure and load filter tape into the unit Filte...

Страница 11: ...2 C 12 Internal View Figure 3 3 C 12 External View TSP Inlet Filter Tape Toggle switch 4 LED Indicators Solar Radiation Shield Optional Lock USB B Serial Connection Internal Sample Tubing Measurement Module Inlet Tube Modem Antenna GPS ...

Страница 12: ...ll as if there are any errors within the device The toggle switch can start or stop the measurement as well as move the tape Figure 3 4 LED and Toggle Switch Interface 3 6 1 LED Interface Table 3 1 describes the LED light functionality when on and off Table 3 1 LED Definitions LED OFF ON FLASHING 1 Not sampling Sampling N A 2 Transport OK Failure Nozzle Tape Break failure 3 Detector OK Failure Det...

Страница 13: ...When LED 2 turns ON release the toggle switch The tape move process will begin 3 7 Filter Tape Installation Loading and Filter Material Notes The C 12 carbon monitor uses treated glass fiber filter tape rolls available from Met One Instruments under part number 83599 It is essential that this tape be used in the C 12 in order to maintain proper instrument calibration and reproducibility Since the ...

Страница 14: ...terclockwise 6 Hold the toggle switch up for about 2 seconds until the Transport LED turns on then release the toggle switch to initiate a tape move Verify that the tape spools correctly Repeat this tape advance sequence until the take up spool rotates at least one full turn Figure 3 5 C 12 Filter Tape Routing 3 7 2 Replacing Used Filter Tape 1 Use the toggle switch to open the measurement module ...

Страница 15: ...p and equilibrate before optimal measurement stability is achieved The C 12 carbon monitor is factory configured with an array of default settings that are appropriate for most sampling requirements The operator may consider changing some of these settings depending on specific requirements See Section 4 for details about the remote user interface and the instrument settings To start a sample when...

Страница 16: ...e Web portal Each customer will be sent a private link to a custom dashboard in which users can view chart and download export their data 4 1 1 How the Cloud Works The C 12 uses a cloud service for storing and viewing data After the C 12 collects the data it connects to the internet and designated secure Cloud site via its internal cell modem Once connected it will push the data to the cloud site ...

Страница 17: ...py of the Comet program Comet is a simple Windows based communications terminal program developed by Met One Instruments Inc Comet allows the user to connect to the cloud and download the data from each cloud service webpage The Comet software also contains a comprehensive pdf user s manual for the program Install the program onto the computer you will be using and review the manual for more opera...

Страница 18: ...tory Create a new station for the C 12 and use it to retrieve the data from the monitor 4 2 2 Setting up a Cloud Station The first time the Comet program is opened it prompts the user to create a new station for your Cloud site If Comet does not prompt you go to the top left menu and select Add New Station to create a new station Select the Cloud Device Product Type and click next Refer to Figure ...

Страница 19: ...re 4 4 Comet Product Type Screen Enter a Station ID API key and Serial Number for the C 12 Figure 4 5 Comet Cloud Information Screen Note Customers will receive an API on the provided configuration sheet a digital copy can be obtained from the Met One Instruments Service department ...

Страница 20: ...d chart tab to view the data When Comet downloads the data a CSV file is created in the users My Documents folder 5 DATA PLANS AND RENEWALS The C 12 includes one year of cellular data and website hosting at no extra charge The cloud service can be renewed by contacting the Met One Service department at service metone com or 541 471 7111 The following yearly data plans are available 680785 CCS Data...

Страница 21: ...isplay are called softkeys or hot keys These are dynamic keys which change in response to a menu option displayed directly above them on the bottom row of the display The function of these keys depends on which menu is shown on the display The four arrow cursor keys are used to scroll up down left and right to navigate in the menu system and to select items or change fields on the screen The arrow...

Страница 22: ...ional 370 nm wavelength The definitions of the fields shown in Figure 6 2 are as follows Parameter Description 370nm Optional Previous sample period result of the UV particulate concentration Nanograms per cubic meter 880nm Previous sample period result of the black carbon concentration Nanograms per cubic meter FLOW Previous sample period result of the actual sample flow rate through the sample f...

Страница 23: ...slightly different than the methods used in some of the other similar Met One Instruments Inc products The flashing cursor is moved to the field to be changed with the keys Once the desired field is highlighted the ENTER key must be pressed to open it for editing A symbol will appear next to opened fields where a pick list is available and the arrow keys can then be used to cycle through the avail...

Страница 24: ...the unit has been stopped for any reason return to the main menu The top option of the menu will now read START SAMPLE Place the cursor on this option and press the ENTER key The C 12 will ask the user to confirm if the sample should be started If confirmed the C 12 will begin the startup sequence and return to the Sampling Screen The Start Stop Measurement screen can also be accessed by pressing ...

Страница 25: ...ded The settings will not be lost if the unit is unplugged or powered down Use the keys to select the desired sub menu and press the ENTER key to enter The SETUP menu is shown below Figure 6 9 The C 12 Setup Menu 6 6 1 The CLOCK Setup Screen The CLOCK setup screen is used to change the instrument date and time Press the ENTER key to open the fields for editing Once open use the arrow keys to set t...

Страница 26: ...rial number The range is 001 to 999 Figure 6 11 The Sample Setup Menu 6 6 3 The MEMORY Setup Screen Clearing the Memory The MEMORY screen is used to clear erase files in the C 12 memory CAUTION This menu function will permanently delete the selected files from the instrument memory Figure 6 12 The C 12 Clear Memory Menus The FILE value can be set to the DATA LOG ALARM LOG or ALL LOGS Pressing the ...

Страница 27: ...or verification and calibration of the actual sample flow rate Press the CONTINUE button on the zero flow screen to advance to the sample flow rate screen Figure 6 14 C 12 Calibrate Flow Screens The SET POINT field is the target flow rate the monitor should be maintaining The FLOW field indicates the current flow rate being measured by the internal flow sensor The STANDARD field is where the value...

Страница 28: ...tested first as shown in Figure 6 17 Figure 6 16 The Self Test Start Screen Figure 6 17 Tape and Detector Testing Figure 6 18 Flow Testing Figure 6 19 Self Test Complete After about 25 seconds the pumps should turn on and the flow tests should commence After the pump has been running for about a minute the flow rate should be stable as shown in the FLOW field see Figure 6 18 The test should take a...

Страница 29: ...ent for the BC LED This should only be used if a detector or LED board is replaced Select the 880 ON softkey to turn on the 880 nm LED An option will be available to 370 nm if this option is employed in the C 12 Contact service Section 1 2 for more information Figure 6 23 LED SET POINT Screen 6 9 2 The TEST MENU Screen The TEST menu allows the operator to select the LAMP TEST Screen to review the ...

Страница 30: ...ssor reset Power off on event logged Ensure unit is provided with stable power 2 4 Tape Move Failure Tape roll exhausted Tape break Tape loose not turning encoder Encoder wheel turns but not measuring tape movement Install new roll of tape Section 3 6 Re attach tape Section 3 6 Tighten tape Section 3 6 Optical encoder fault Contact Met One Instruments service department for assistance Section 1 2 ...

Страница 31: ...n Table 7 1 Alarm Triggers Detector Alarm Events The detector alarm events are detailed in Table 7 2 Any detector failure event will stop machine operation force a tape advance and then attempt to resume normal sampling Detector warnings will be logged but will not interrupt operation The IR and UV detector range is 0 0 to 2500 mV The limits are as follows Saturation Limit 2450 mV Detector Limit 1...

Страница 32: ...roblem Flow failures or low flow Cause Solution Make sure that the tape is properly advancing the dirty spots See Section 6 8 2 DEFAULT the flow sensor calibrations and re calibrate the flow If corrupted flow calibration parameters are entered into the flow calibration it may appear that the flow system is not working See Section 7 4 Verify the BT and BP sensor function Failed sensors will affect ...

Страница 33: ...83011 span check membrane is damaged A replacement 83011 membrane can be purchased from the Met One Instruments Service Department Table 7 4 Common Problems and Solutions 7 3 Suggested Periodic Maintenance Intervals Table 7 5 shows the Met One Instruments recommended periods for routine maintenance items Some of these items will need to be performed more or less often depending on local conditions...

Страница 34: ...y Figure 7 2 The C 12 Flow Calibration Screens All flow values are in Qa actual volumetric conditions The screen will first display the zero flow mode with the pump OFF The measured flow will be displayed at the top of the screen Press the ZERO softkey to zero the flow sensor Then press CONTINUE to proceed to the main flow calibration screen and automatically turn the pump ON The SET POINT paramet...

Страница 35: ...hanges to the instrument calibration are made with this process This is a span check only Press the MENU key Highlight the CALIBRATE MENU item and select the ENTER key Scroll to the CALIBRATE AUDIT option and select the ENTER key again When entering the CALIBRATE AUDIT menu the Measurement Module should be in the OPEN position If it is not or if the state is unknown press the MOVE button see Figur...

Страница 36: ...e 7 8 display results with the optional C 12 BRC 370 UV option Standard configuration CALIBRATE AUDIT results will only display BC results The values should be within 5 of the values indicated on the label of the 83011 ND Filter Record the results and then press the CONTINUE button The measurement module will open and the display will indicate when it is safe to remove the ND filter as shown in Fi...

Страница 37: ...considered passing Figure 7 10 The C 12 Leak Test Menu Once complete press the PUMP OFF key to turn off the pump Slowly release the vacuum in the system by easing off the vinyl cap before exiting this screen The warning screen shown in Figure 7 10 will be displayed when exiting the Leak Test screen Exiting the Leak Test screen before releasing the vacuum will cause the vacuum to be released rapidl...

Страница 38: ...ype CELL Name Offset Slope Flow 0 000 1 000 Factory Settings DQogICAgICBQYXNzd29yZCwgMA0KICAgICAgICAgIEJhdWQsIDExNTIwMA0KICAg IFRpbWUgU3RhbXAsIEVORElORw0KICAgICAgIElTZXR0bGUsIDENCiAgICAgIElB dmVyYWdlLCA5DQogICAgICBDLUZhY3RvciwgMi42MTANCiAgICAgICAgVVYgQWJz LCAxOC4yMzM2DQogICAgICAgIEJDIEFicywgNy43NzAwDQogICBVViBLLUZhY3Rv ciwgMS4wMDANCiAgIEJDIEstRmFjdG9yLCAxLjAwMA0KICAgICBVViBBZXJvIEss IDEuMDAwDQogIC...

Страница 39: ...d BP mmHg is the average barometric pressure for the last sample period from the internal BP sensor Status is the alarm status see Section 7 1 Time BC ng m3 Flow lpm BT C BP mmHg Status 10 15 2021 16 39 120 2 1 0 27 5 733 6 0 Figure 8 3 User Data File Report 8 2 Flash Firmware Upgrades The C 12 has the capability for flash firmware upgrades This allows the field operator to reprogram or update the...

Страница 40: ... the e mail link to the Met One FTP site 3 Connect the instrument USB serial port to the computer 4 Run the Firmware Update Utility From the computer Start menu go to Programs Met One c 12 C 12 Master Program Installer or similar directory The program may prompt to press ENTER to begin the update 5 A Done message will be displayed at the end of the update process Execution time is approximately fi...

Страница 41: ...e technical service department Some of these parts may require technical skills or special instructions before use or installation Description Part Number Graphic Filter Tape Roll 83599 Span Check Membrane 83011 Cap Vinyl 1 2 ID x1 2 Long Black 770025 TSP Inlet 9441 Optional Pole Mount 83597 Optional Mounting Stand 83598 Flow Sensor Assembly 82180 4 Pump Module Sample Flow 83812 USB Cable 500784 ...

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