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BAM 1020-9800 Manual Rev W.docx 

Page 28 

4 

THE MEASUREMENT CYCLE 

This section describes the measurement and timing cycle of the BAM 1020 instrument. An 
understanding of the measurement is helpful for the effective operation and maintenance of 
the BAM 1020. For advanced information on the underlying theory and mathematics of the 
measurement see Theory of Operation, Section 11. 
 

  

 

BAM 1020 Sample and Measurement Stations 

4.1  The One-Hour Cycle Timeline 

The BAM 1020 is almost always configured to operate on 1-hour cycles. The BAM 1020 has 
a real-time clock which controls the cycle timing. The COUNT TIME on the BAM 1020 is user 
selectable, but is generally set to 4 minutes for PM

10

 measurement or to 8 minutes for PM

2.5

 

measurement. In the example timeline below the BAM 1020 makes an 8-minute beta 
measurement at the beginning and the end of each hour, with a  42 minute air sample period 
in between, for a total of 58 minutes. The other two minutes of the hour are used for tape and 
nozzle movements during the cycle. This timeline applies if the BAM 1020 is set for a COUNT 
TIME of 8 minutes, which is required for all EPA and EU designated PM

2.5

 configurations. 

BAM 1020 monitors operating with firmware 3236-5 version 3.7.1 or later may be configured 
for PM

10

 or PM

2.5 

operation. When configured as a US-EPA designated equivalent method for 

PM

2.5

, COUNT TIME must be set to 8 minutes. If you desire to operate the BAM 1020 as a 

non-designated method for PM

2.5 

monitoring you may set the COUNT TIME to 4, 6, or 10 

minutes. When running the BAM 1020 as a US-EPA designed equivalent method for PM

10

 

COUNT TIME may be set to 4, 6, 8, or 10 minutes. The total measurement cycle is 1 hour. 
The pump sampling time may be calculated by subtracting twice the COUNT TIME from 60 
minutes and then subtracting an additional 2 minutes to allow for tape movement. Therefore 
a COUNT TIME of 8 minutes would provide a pump sampling time of 42 minutes (60-8-8-2).  

Note:

 This cycle will be slightly altered if the BAM 1020 is operated in the special Early Cycle 

mode with an external data logger. See Section 8. 

The example below provides an example of the timing of a measurement cycle with a 
COUNT TIME of 8 minutes.  

1. 

Minute 00:

  The beginning of an hour. The BAM 1020 advances the filter tape 

forward one “window” to the next fresh, unused spot on the tape. This takes a few 
seconds. The new spot is positioned between the beta source and the detector, and 

Beta Source 

Detector 

Nozzle 

Beta Source 

Detector 

Содержание BAM 1020

Страница 1: ...ration Manual Copyright 2016 Met One Instruments Inc All Rights Reserved worldwide No part of this publication may be reproduced 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 BAM 1020 PARTICULATE MONITOR OPERATION MANUAL BAM 1020 9800 REV W ...

Страница 2: ...Leak Check and Flow Check 25 3 8 Starting a Measurement Cycle 25 3 9 Accessing the Flow Statistics Screen 25 3 10 The OPERATE Menus 26 3 11 The NORMAL Operation Screen 26 3 12 The INSTANTANEOUS and AVERAGE Operation Screens 27 4 THE MEASUREMENT CYCLE 28 4 1 The One Hour Cycle Timeline 28 4 2 Automatic Span Checks During The Cycle 29 4 3 Filter Tape Use 30 5 FLOW SYSTEM and FLOW CALIBRATIONS 31 5 1...

Страница 3: ...ane Mass Tests 69 7 14 INTERFACE Test Menu Relay I O Channel Tests 70 7 15 FLOW Test Menu 70 7 16 ALIGN Test Menu Tape Transport Motor and Photosensor Tests 70 7 17 HEATER Test Menu 71 7 18 FILTER T Test Menu Filter Temperature Sensor Tests 71 7 19 RH Test Menu Filter Humidity Sensor Test and Calibration 72 8 EXTERNAL DATA LOGGER INTERFACE SYSTEM 74 8 1 Analog Concentration Output Signal 74 8 2 Ea...

Страница 4: ...sions throughout the manual Applies to all BAM 1020 units All BAM 1020 units using revision 3 2 5 or later firmware should have a Rev G or later manual H June 2010 Revisions to incorporate information about the PM Coarse designated version and to add information about new firmware features up to firmware rev 3 6 Additional maintenance procedures added J Sep 2011 Minor revisions to zero filter test...

Страница 5: ...4C carbon 14 element inside of the BAM 1020 provides a constant source of beta rays The beta rays traverse a path through which glass fiber filter tape is passed before being detected with a scintillation detector At the beginning of the measurement cycle the beta ray count I0 across clean filter tape is recorded Then an external pump pulls a known volume of PM laden air through the filter tape th...

Страница 6: ...er EQPM 0715 266 PM2 5 with URG Cyclone Designation Number EQPM 0709 185 PM10 2 5 with BGI Mesa Labs Cyclones US EPA designated methods using the BAM 1020 are modified from time to time in order to reflect hardware or software improvements These modifications do not impact previously designated configurations of the BAM 1020 but may provide the end user with a product upgrade path that will allow ...

Страница 7: ...densing Humidity Control Actively controlled inlet heater module 10 99 RH set point Approvals U S EPA MCERTS CE NRC TUV CARB ISO 9001 Standard User Interface Menu driven interface with 8x40 character LCD display and dynamic keypad Optional User Interface Graphic color touch screen display module Model BX 970 Analog Output Isolated 0 1 VDC output standard 0 10V 4 20mA 0 16mA switch selectable Seria...

Страница 8: ...n a weatherproof level low vibration dust free and temperature stable environment where the operating temperature is between 0o C and 50o C and where the relative humidity is non condensing and does not exceed 90 There are two standard configurations described below for providing a weatherproof location in which to install the BAM 1020 Please contact Met One Instruments for advice if you plan to h...

Страница 9: ...esult If this proves to be an issue the user may consider increasing the temperature inside the shelter to a point closer to ambient temperature The BAM 1020 should not be placed directly in the path on an air conditioning vent 2 3 Site Selection and Inlet Positioning Criteria We recommend that you check for local regulations and guidance documentation that may exist before selecting the site in w...

Страница 10: ...eful for determining where to locate the hole Note that the inlet receiver on the BAM 1020 is slightly off center BX 902 903 mini shelters do not require any roof drilling 2 Waterproof Roof Flange Apply all weather silicone caulking around the top of the hole and install the BX 801 roof flange onto the hole The threaded barrel of the flange is usually installed downward Secure the flange in place ...

Страница 11: ...AM 1020 depending on the heater control relay location Make sure that you recognize which of the two following configurations you have Most units built between 2008 and 2012 were supplied with an external gray relay module which plugs into a mating black plastic connector on the back of the BAM 1020 The Smart Heater connector plugs into the green connector on the top of this relay module as shown ...

Страница 12: ...ot require inlet tube supports 8 Temperature Sensor Installation BAM 1020 units are supplied with a BX 592 temperature only BX 596 AT BP or BX 597 AT BP RH sensor which attaches to the inlet tube above the roof The sensor cable must route into the shelter to be attached to the BAM Use a waterproof cable entry point or weatherhead if your shelter has one The BX 902 903 mini shelters have a cable en...

Страница 13: ...should measure only a couple of Ohms or less if a good connection is made with the set screws If not remove the set screws and run a 20 tap through the holes Then reinstall the screws and check the electrical resistance again Note Anodized aluminum surfaces are non conductive 11 Pump Location and Installation The best location for the vacuum pump is often on the floor under the rack or bench but i...

Страница 14: ... the voltage accurately Information on configuring this analog output is provided in Section 8 of this manual A current loop output is also available Newer data loggers often interface to the BAM 1020 using the digital serial ports for better accuracy Information about this is also found in Section 8 Met One can also supply additional technical bulletins on the subject The BAM 1020 has a variety o...

Страница 15: ...Inlet Tube 8 standard BX 801 Roof Flange Enclosure Roof BX 827 or 830 Smart Heater with insulation Mounting Bench or Rack 2 2 Meters 6 5 feet adds 14 0 adds 19 0 BAM 1020 With Medo vacuum pump or equivalent 8 min clearance 3 to 4 feet typical 5 typical BAM 1020 MET ONE INSTRUMENTS Typical BAM 1020 Installation in a walk in shelter Pipe Insulation recommended ...

Страница 16: ... or BX 592 27 Inlet Tube 2 Total Height 6 6 ft 2 0 meters without cyclone 7 0 ft 2 1 meters with cyclone adds 14 0 adds 19 0 15 5 27 typical Inlet tube Mounting Rack BX 902 or 903 Environmental Enclosure BX 126 Vacuum Pump or equivalent BX 827 or 830 Smart Heater with insulation 8119 Inlet Seal Typical BAM 1020 Installation in a BX 902 mini enclosure ...

Страница 17: ...front face of BAM 14mm 9 16 from center CL 9 25 3 5 FRONT BACK TOP BAM 1020 mounting dimensions 71mm 2 13 16 from front of rack Lifting Notes The main unit weighs slightly over 50 lbs with the center of mass near the front of the BAM 1020 Lift by the rack rails or by the bottom corner bracket Observe proper lifting and carrying techniques ...

Страница 18: ...1 NORMAL C2 REVERSE REPORT POLARITY C1 NORMAL C2 REVERSE SW1 OFF 0 1V SW1 ON 0 10V SW2 OFF 0 16mA SW2 ON 4 20mA SIGNAL COMMON POWER SIGNAL POWER COMMON NC COMMON NO POWER ID SIGNAL 1 COMMON SIGNAL 2 CHAN 8 CHAN 9 CHAN 10 RELAY 2 SMART HEATER Notes About Expanded Digital Ports There are several generations of the BAM 1020 digital port configurations Older units do not have the REPORT COM 3 USB or E...

Страница 19: ...76A 175W BX 902B Shelter One Mini Shelter 120V worst case with shelter heater ON 4 2A 500W BX 903 Ekto Mini Shelter 120V 2000 BTU air conditioner 7 4A 586W BX 904 906 Ekto Mini Shelter 120V 4000 BTU air conditioner 13 5A 1172W Notes The BAM transport motors only run for a few seconds each per hour Quiescent BAM current is 0 1A The vacuum pump runs for either 42 or 50 minutes per hour Startup inrus...

Страница 20: ...that the BAM 1020 is plugged in to the correct AC voltage and that any electrical accessories are correctly wired before powering it up Section 2 6 When power is switched on the main menu screen should appear after a few seconds as shown below The screen may flash an error indicating that there is no filter tape installed Note Units running revision 3 1 or earlier firmware will display a slightly ...

Страница 21: ...o change parameters or increment decrement values in the menu system Contrast Key The key with a circular symbol on it is for adjusting the light dark contrast on the LCD display Press and hold the key until the desired contrast is achieved It is possible to over adjust the contrast and make the entire display completely blank or completely dark so be careful to set it to a visible level Function ...

Страница 22: ...Loading a roll of filter tape into the BAM 1020 is a simple matter using the following steps 1 Turn on the BAM 1020 The BAM 1020 should automatically raise the sample nozzle 2 Lift the rubber pinch roller assembly and latch it in the UP position 3 Unscrew and remove the two clear plastic reel covers 4 An empty core tube MUST be installed on the left take up reel hub This provides a surface for the...

Страница 23: ...tart the test The tests will take a couple of minutes and the BAM 1020 will display the results of each tested item with an OK or a FAIL tag If all of the test items are OK the status will show SELF TEST PASSED as shown in the drawing below If any item fails the status will show ERROR OCCURRED Self Test Status Screen LATCH This will show OFF if the photo interrupter senses that the pinch rollers a...

Страница 24: ...ensioner photo interrupters SHUTTLE The BAM 1020 will attempt to move the shuttle beam left and right and will check the motion with a photo interrupter REF EXTEND The BAM 1020 will attempt to extend the reference membrane and will check the motion with a photo interrupter REF WITHDRAW The BAM 1020 will attempt to withdraw the reference membrane and will check the motion with a photo interrupter 3...

Страница 25: ...usly operate until commanded to stop The BAM 1020 will stop if the operator enters any of the SETUP or TEST menus The BAM 1020 will also stop itself if a non correctable error is encountered such as broken filter tape or failed air flow 3 9 Accessing the Flow Statistics Screen While the BAM 1020 is displaying the main menu screen the button can be pressed and the BAM will display a FLOW STATISTICS...

Страница 26: ... soft key options for viewing the operating status and sensor measurements while the BAM 1020 is operating NORMAL INST and AVERAGE 3 11The NORMAL Operation Screen Normal Mode is the primary operation screen which displays most of the important parameters of the sample progress in one place as shown below Many operators leave their BAM 1020 in the NORMAL screen whenever the BAM 1020 is operating in...

Страница 27: ...otal flow volume during the last period The Instantaneous Menu The VOLT ENG soft key toggles the displayed values between units and voltages useful for diagnostic checks on external sensors The AVERAGE screen is the same as the INST screen shown above except that the concentration and flow are presented as the previous hour s average values and the six external data logger channels are average val...

Страница 28: ...ated PM2 5 configurations BAM 1020 monitors operating with firmware 3236 5 version 3 7 1 or later may be configured for PM10 or PM2 5 operation When configured as a US EPA designated equivalent method for PM2 5 COUNT TIME must be set to 8 minutes If you desire to operate the BAM 1020 as a non designated method for PM2 5 monitoring you may set the COUNT TIME to 4 6 or 10 minutes When running the BA...

Страница 29: ...concentration The BAM 1020 advances a new fresh spot of tape to the beta measurement area and the measurement cycle starts again 4 2 Automatic Span Checks During The Cycle While the vacuum pump is on and pulling air through the filter tape as described above the BAM 1020 performs a span check The user may set up the BAM 1020 to perform the span check hourly once per day or not at all The BAM 1020 ...

Страница 30: ... can be found on the calibration sheet Most membrane alarms are caused by a dirty membrane foil The stability measurements 𝐼1 and 𝐼1 may be compared to determine if the beta counts have changed appreciably during the measurement cycle Rapid changes in temperature relative humidity or other factors may lead to this 4 3 Filter Tape Use The BAM 1020 positions the filter spots very close to one anothe...

Страница 31: ... are needed to convert mass flow into volume flow rate LPM 5 2 Flow Control and Flow Reporting Types Standard or Actual Flow BAM 1020 monitors with firmware revision 3 0 or later after 2006 have both a FLOW TYPE and a CONC TYPE setting Both can be set to either STD or ACTUAL see Section 6 3 The BAM 1020 is capable of controlling the flow using either standard or actual temperature pressure conditi...

Страница 32: ...trations under standard conditions set CONC TYPE to STD The BAM 1020 will then convert the actual volume sampled during the measurement cycle into the corresponding standard volume and report the mass concentration under standard conditions 5 3 Total Flow QTOT and Flow Rate LPM Conversions The QTOT measurement can be converted to LPM by multiplying the QTOT value by 1000 then dividing by the BAM S...

Страница 33: ...nto the inlet tube If a PM2 5 cyclone is used install the leak check valve on top of the cyclone since the cyclone is a possible source of leaks and should be tested Turn the valve to the ON position 4 Enter the TEST PUMP menu and turn the pump on Allow the flow rate to stabilize and then press the LEAK button to turn on the leak test mode This will prevent the flow controller from rotating during...

Страница 34: ...zzle must be inspected regularly and cleaned as needed in order to prevent leaks at the interface between these parts and the filter tape We recommended that the nozzle and vane be inspected monthly for tape build up Some sites may require a more frequent inspection and cleaning interval BAM 1020 monitors operated in hot humid environments may require more frequent nozzle and vane cleaning When th...

Страница 35: ...e left is from a properly operated BAM 1020 with a clean nozzle and vane The dust spots have crisp edges are perfectly round and are evenly distributed The tape on the right is from a unit which has a leak A spot of debris has built up on the vane and is punching a pin hole at the edge of each spot These holes can allow beta particles to get through unattenuated which can lead to erroneous concent...

Страница 36: ... will lower automatically when this screen is entered 2 Optional Audit Only To perform a simple flow check or audit in which no calibrations are to be changed simply use the NEXT soft key to select the AT temperature BP pressure and FLOW 3 16 7 parameters one at a time Compare the BAM column reading to your standard device for each parameter and record the results No calibrations are altered if th...

Страница 37: ...re required in order to get a good match then the BAM flow calibrations may need to be reset This case has sometimes been observed during the first flow calibration after a BAM 1020 firmware update Select a parameter and press the DEFAULT soft key to clear out all previous calibration factors from that parameter and replace them with the original factory calibration factor Default all of the AT BP...

Страница 38: ...ow BAMs with a Temperature Sensor If the BAM 1020 is an older PM10 unit without a separate CONC TYPE setting or if the operational FLOW TYPE must be set to STANDARD for some special reason then the easiest way to calibrate the flow is to temporarily change the FLOW TYPE from STD to ACTUAL in the SETUP CALIBRATE menu then perform a normal actual flow audit or calibration as described above If this ...

Страница 39: ... Menu provides a choice of operations Use the arrow keys to navigate to the desired field then press the SELECT soft key to enter SETUP MODE SELECT CLOCK SAMPLE CALIBRATE EXTRA ERRORS PASSWORD INTERFACE SENSOR HEATER QUERY REPORTS HJ 653 SELECT EXIT The SETUP Menu A brief description of each sub menu in shown in the table below Detailed information is provided in the following subsections Menu Set...

Страница 40: ...edited BAM SAMPLE This value sets the number of minutes per sample hour that the pump is ON See Section 4 1 for a description of the hourly cycle The BAM SAMPLE time must be set in response to the COUNT TIME value since current versions of the BAM 1020 allow the option of setting the count time to 4 or 8 minutes If the BAM 1020 is used for PM2 5 FEM or EU PM2 5 monitoring the BAM SAMPLE must be se...

Страница 41: ...writes the oldest data It is recommended that the MET SAMPLE period set at the default value of 60 minutes unless a faster average is required for a particular met sensor application MET SAMPLE Data Capacity 60 min 182 days 15 min 45 days 5 min 15 days 1 min 3 days RANGE The RANGE setting sets the full scale range of the concentration measurement system of the analog voltage output The BAM 1020 in...

Страница 42: ... were fixed at mg m3 only and this is still the default setting Note 1 000 mg 1000 g COUNT TIME This is the time the BAM 1020 takes to perform the I0 and I3 counts at the beginning and the end of the sample hour When used for PM2 5 FEM EU PM2 5 or PM10 2 5 coarse monitoring the COUNT TIME must be set to 8 minutes For PM10 measurement COUNT TIME may be set to 4 6 or 8 minutes See the BAM SAMPLE set...

Страница 43: ... for temperature and pressure 760 mmHg and usually 25C even if a temperature sensor is available See Section 5 2 Note units with firmware prior to rev 3 0 do not have this setting available and the concentration reporting is determined by the FLOW TYPE setting FLOW TYPE This setting selects the flow control scheme used by the BAM 1020 The options are ACTUAL or STD Section 5 2 contains a detailed d...

Страница 44: ...ver HEATER This setting selects which operation mode the Smart Inlet Heater is used in This value must be set to AUTO for all PM2 5 PM10 and PM10 2 5 monitoring When set to AUTO the Smart Heater can use the filter RH and or temperature sensors to control the inlet tube heating The setup parameters for the Smart Heater logic are located in the separate SETUP HEATER menu which will not appear as an ...

Страница 45: ...Basic Description E External Reset Failed BAM clock reset U Telemetry Fault External data logger fault M Maintenance Alarm Entering the SETUP or TEST menus or setting Maintenance on I Internal CPU Error Internal processor error or failed data link between coarse units L Power Failure Power failure prevented sample completion R Reference Membrane Reference span membrane not extending or retracting ...

Страница 46: ...ill still be output on the analog output terminals ERROR TEXT The full scale concentration value typically 0 985 mg will be output on the analog output terminals The word ERROR will be displayed in place of the concentration value on the Main Menu Normal Instantaneous and Average screens See section 3 for more information about these screens The word ERROR will also be stored in the data file and ...

Страница 47: ...ally closed Almost never used Split DELTAP Not used Reset Polarity This tells the BAM 1020 the incoming polarity of an external clock reset signal if used This signal is used to synchronize the BAM 1020 clock to an external data logger NORM is normally open INV is normally closed Almost all data loggers use normal open polarity for the signal 6 8 SENSOR Setup Screen for External Met Sensors The SE...

Страница 48: ... the sensor represents 50 C FS VOLT This is the full scale voltage output of the sensor The maximum voltage range that can be supplied by the sensor This value is usually going to be either 1 000 or 2 500 volts 2 500 is the maximum setting for this field INV SLOPE This setting allows the channel to recognize a sensor with an inverse slope This is always set to N no except for use with thermistor t...

Страница 49: ... and the ambient temperature is 3 C the relative humidity downstream of the filter tape would be about 22 were the filter temperature 15 C which means that the Smart Heater would not have to apply additional heat were the BAM 1020 to be operated inside of a temperature controlled enclosure set maintain an instrument temperature of about 20 C in order to maintain the filter temperature RH value of ...

Страница 50: ... Frequent errors will be logged if the set point is too low Set the value to 99 if Delta T control is not used Datalog Delta T If YES is selected the Delta T values will be logged on met channel 5 of the BAM 1020 as long as no other external sensors are attached to channel 5 Note The measured Delta T values may still be logged even if Delta T control is set to NO Many BAM 1020 users log the Delta ...

Страница 51: ... mg cm2 FLOW Real time flow or average flow for the last sample CV Flow coefficient of variability for the last sample period Standard deviation divided by the mean AT Average ambient temperature for the sample period BP Average barometric pressure for the sample period ANALOG 1 Average of analog met sensor channel 1 user defined channel ANALOG 2 Average of analog met sensor channel 2 user defined...

Страница 52: ...to choose the range of the concentration value being stored in the data logger The two possible choices are STANDARD or EXTENDED Both settings will utilize the same OFFSET value configured in the SETUP SAMPLE screen See section 6 2 for details on setting the OFFSET value The STANDARD range sets the logger scaling to match the analog output range as determined using the RANGE setting in the SETUP S...

Страница 53: ...ion is also set to ACTUAL it will be formatted in this manner Time ConcA ug m3 QtotA m3 XXXXX XXX XXXXX XXX XXXXX XXX RH XXXXX XXX AT C ConcS ug m3 QtotS m3 BP kPa Flow LPM E U M I L R N F P D C T 2017 10 15 16 40 123 4 0 700 0 0 0 39 0 24 3 139 1 0 621 100 2 16 69 0 0 0 0 0 0 0 0 0 0 0 0 If the concentration is set to STANDARD it will be formatted in this manner Time ConcS ug m3 QtotA m3 XXXXX XX...

Страница 54: ... and vane cleaning Monthly Leak check Monthly Flow system check audit Monthly Clean capstan shaft and pinch roller tires Monthly Clean PM10 inlet particle trap and PM2 5 cyclone particle trap Monthly Download and save digital data log and error log Monthly Compare BAM 1020 digital data to external analog data logger data if used Monthly Check or set BAM real time clock Monthly Replace filter tape ...

Страница 55: ...the synch signal occurs within the acceptable window near the end of the hour but before the BAM has finished the previous concentration calculation The digital error log will indicate which of these two has conditions occurred If an external clock reset event is successful then no alarm is logged These alarms do not prevent the BAM from storing a valid data record for the sample hour Manually set...

Страница 56: ... if the span foil assembly is stalled in a partially extended position it could block the beta signal and prevent valid data collection N Nozzle Error or Delta T Alarm This error indicates that the nozzle motor is not operating correctly The error is triggered if photo sensors S4 and S5 never change state within 12 seconds despite drive commands to nozzle motor The concentration value is set to fu...

Страница 57: ...ulation based on the partial volume then wait for the next hour This feature is designed to stop the sample early if the vacuum capacity of the pump is about to be exceeded before flow errors occur Firmware before Rev 3 6 3 would not stop the sample for the P alarm and subsequent flow errors could occur due very high concentration dust loading The pump cycle must run for at least 5 minutes before ...

Страница 58: ...d concentration value until the tape was replaced In rarer cases a tape error may also be generated due to a failure in the tape control electromechanical system In current firmware there are several possible sub categories for this error which will appear in the digital error log Tape Latch Pinch rollers latched up at cycle start Tape Shuttle Shuttle photosensor not responding to shuttle move Tap...

Страница 59: ...ect data on both devices for a period of time in order to demonstrate reasonable correlation and acceptable levels of multiplicative slope and additive intercept bias between the two methods Performing such a field test is beneficial as it could reveal an undetected performance or data reporting issue Common issues could include improper data logger scaling incorrect background BKGD values or impr...

Страница 60: ...r repair the power supply assembly unless qualified Warning The BAM 1020 uses hazardous live voltages which can cause electrocution if electrical safety precautions are not strictly followed during service or repair of the machine The BAM 1020 is designed to provide protection from hazardous voltages during normal operation If the equipment is modified or used in a manner not specified by the manu...

Страница 61: ... BAM 1020 cannot start if the pinch rollers are latched UP The BAM 1020 cannot lower them Make sure the filter tape is installed correctly The BAM 1020 will never start a cycle if the display is left in a TEST or SETUP menu The main screen or OPERATE menu must be displayed The BAM 1020 will usually display an error if it cannot start a new sample cycle Problem The analog output voltage and or digi...

Страница 62: ...board output is not working If the flow regulates lower but not higher than 16 70 lpm the pump is probably worn out or there is a leak Problem The nozzle gets stuck in the UP position or won t press down onto the tape fully Cause Solution With the nozzle in the down position lift the nozzle up and down with your thumb and determine if it feels sticky or gritty The nozzle O ring eventually breaks d...

Страница 63: ...ary much over several hours then the BAM data may show repeated values due to lost resolution Leave the RANGE set to 1 000mg unless very high concentrations are expected Problem Frequent D membrane density errors Cause Solution This usually indicates the membrane foil surface is dirty or damaged It can be cleaned with water rinse Damaged membranes must be replaced The membrane assembly may not be ...

Страница 64: ...move the four screws two flat head Philips two 9 64 hex that fasten the square inlet receiver bracket to the BAM chassis Lift the assembly off of the BAM It is not necessary to remove the bracket from the inlet receiver cylinder 3 Remove the three 9 64 hex screws that fasten the nozzle adapter to the top of the beta block A T handle hex wrench is easiest The nozzle adapter can now be lifted off of...

Страница 65: ...t performed before the equipment is first deployed so that an initial BKGD adjustment may be made if necessary We recommend repeating this test periodically as part of a QA QC program the frequency of which is up to the user When the BAM 1020 is set up for the first time we recommend that a minimum of 48 72 valid 1 hour data points be collected in order to accurately determine the BKGD value The i...

Страница 66: ...nimize the chance of a miscalculation 1 Enter the SETUP CALIBRATE menu a Record the existing BKGD value then change it to 0 0000 optional b Note the Conc type and set it to Actual if it is not c Note the Flow type and set it to Actual if it is not d Save and exit back to the main menu 2 Install the BX 302 zero filter assembly onto the top of the inlet tube Note when it is necessary don t forget to...

Страница 67: ...st will take 4 minutes and will show the number of beta particles counted as they accumulate The final count total will stay on the display after the counting is finished and up to six count tests can be displayed on the screen at once Count tests are usually performed with a clean section of filter tape between the source and detector as in normal operation The GO soft key is pressed to start a n...

Страница 68: ...s about 5 seconds If the pump is ON this operation is disabled The PUMP ON and PUMP OFF soft keys can be used to turn the vacuum pump on or off The nozzle will be lowered automatically if PUMP ON is pressed 7 11 TAPE Test Menu Manual Filter Forward Backward Tests The TEST TAPE menu allows the user to manually move the filter tape forwards or backwards in increments of 12 5mm windows This is useful...

Страница 69: ... sheet for your unit The values must match within 5 and will typically match within just a few micrograms If not the most common cause is a dirty membrane foil which can be carefully cleaned with canned air or clean water rinse Alcohol is not used because it leaves a film CD cleaner works well for badly soiled membranes Caution The span membrane foil is a thin sheet of polyester and is fragile It ...

Страница 70: ...vement in the BAM 1020 tape transport assembly This is useful if the BAM 1020 has failed some of the Self Test parameters The function of the six ALIGN sub menus are described in this section Note The filter tape should be removed during these tests because many of these functions will break the tape The TEST ALIGN Menu NOZZLE This screen tests the two nozzle photosensors and the nozzle motor Use ...

Страница 71: ...s pressed the membrane should withdraw and the S2 photo sensor should be OFF and S3 ON It takes a few seconds for the membrane to move Tape Transport Assembly 7 17 HEATER Test Menu The TEST HEATER screen is used to force the Smart Heater ON or OFF for testing purposes The heater takes several minutes to heat up or cool down noticeably The heater automatically turns back off upon exit from the scre...

Страница 72: ... calibration alone unless you have clear evidence that it needs to be calibrated If the filter RH sensor is calibrated without first being fully equilibrated to ambient it will introduce a large artificial offset For example The ambient RH is 50 but the filter RH sensor reads 20 due to inlet heat If the filter sensor calibration is adjusted to that it matches 50 this adds a 30 offset to all RH rea...

Страница 73: ...nce RH device To calibrate the sensor enter the reference value into the BAM display and press CAL to change the BAM value to match The RESET key can be used to remove all previous field calibrations from the sensor and restore the default factory calibration Do not press the CAL key after RESET or whatever value happens to be in the REFERENCE field will be calibrated ...

Страница 74: ...t voltage of the BAM 1020 is determined by the RANGE and OFFSET setting See Section 6 2 In most applications where the OFFSET is set to 0 015 and the RANGE is set to 1 000 mg the BAM 1020 analog output will be scaled as 0 000v to 1 000v equals 0 015 mg to 0 985 mg It is critical that your analog data logger input is programmed to scale this voltage correctly or a significant data offset mistake wi...

Страница 75: ...ing the EXT RESET inputs described below The following describes the timing of the STANDARD and EARLY modes STANDARD Cycle Example EARLY Cycle Example Analog Output Levels C0 represents the concentration output level measured from time T0 to T1 where the T labels represent the top beginning of an hour such as 12 00 00 As you can see the concentration voltage C0 for the standard cycle is present fo...

Страница 76: ...a completed cycle idle condition then no error occurs The clock will be set forward to minute 55 00 of the current hour and a new measurement cycle will start 8 3 Telemetry and Error Relays In addition to the analog output voltage several input and output relay connections are provided on rear panel of the BAM 1020 These can be connected to an external data logger as a second method of indicating ...

Страница 77: ...L COMMON POWER ID SIGNAL COMMON POWER ID SIGNAL COMMON POWER ID EXTERNAL RESET NO VOLTAGE EXTERNAL RESET VOLTAGE TAPE FAULT INVALID DATA MAINTENANCE FLOW FAULT PUMP CONTROL POWER FAIL VOLTAGE OUTPUT CHASSIS GROUNDS CURRENT OUTPUT CHAN 2 CHAN 3 CHAN 5 CHAN 6 CHAN 7 CHAN 4 RS232 POLARITY C1 NORMAL C2 REVERSE REPORT POLARITY C1 NORMAL C2 REVERSE SW1 OFF 0 1V SW1 ON 0 10V SW2 OFF 0 16mA SW2 ON 4 20mA ...

Страница 78: ...is generated by the BAM see section 7 2 Polarity is normally open 6 INVALID DATA This is a contact closure output which will be activated whenever a C P N R L I M or U error is generated by the BAM see section 7 2 Polarity is normally open 7 MAINTENANCE This is a contact closure output which will be activated whenever a maintenance M flag is generated by the BAM see section 7 2 Polarity is normall...

Страница 79: ... the digital logger to make a single hourly data request to the BAM near the middle of each hour such as between minute 25 and minute 50 However small files such as the last hourly record can be downloaded very quickly and may be accomplished at almost any time during the hour as long as the timing is carefully controlled If your data logger is programmed to digitally request data from the BAM 102...

Страница 80: ... port has its own file service system which can t be interrupted or ignored by the BAM sample cycle and should be used whenever available Both the RS 232 and REPORT ports contain the same data files and are accessed in the same manner The PRINTER port is output only and is rarely used The COM3 port is for connecting two BAMs together in PM coarse systems only RS 232 Connections Most older desktop ...

Страница 81: ...d rate must match the BAM baud setting If unable to establish communications try changing the RS 232 Polarity switch or the Report Polarity switch if using the REPORT connection on the back of the BAM 1020 This swaps the polarity of the TX and RX lines pins 2 3 and functions as a null modem NOTE The BAM 1020 user interface must be in the main top level menu or OPERATE menu before any communication...

Страница 82: ...other port if used from the drop down menu in the Connect Using field Click OK Note You can also set up the program to dial the BAM through a modem in this window 4 The COM1 Properties window will open Set the following values in the drop down menus then click Apply and OK Bits per second 9600 Data bits 8 Parity None Stop bits 1 Flow control None 5 The main HyperTerminal connection window should n...

Страница 83: ... shown below File 1 Current Data is data from the current day only File 2 All Data is all of the data in the BAM separated into daily blocks File 3 New Data is all data since the last download also in daily blocks A data pointer is set in the BAM indicating where the last download stopped See Section 9 8 The first data column is the time followed by a series of dashes which represent error or alar...

Страница 84: ... 022 3 15 00 0 020 0 833 019 1 0 011 000 3 00011 132 0 020 9 16 00 0 011 0 834 019 3 0 011 000 3 00012 132 1 018 7 17 00 0 010 0 833 019 5 0 012 000 3 00012 132 2 017 9 18 00 0 010 0 833 019 4 0 012 000 3 00012 132 1 017 1 19 00 0 010 0 834 019 4 0 012 000 3 00014 132 2 015 3 20 00 0 007 0 833 019 6 0 012 000 3 00015 132 1 014 4 21 00 0 006 0 834 019 5 0 012 000 3 00017 132 1 013 3 22 00 0 006 0 8...

Страница 85: ...lt Polarity NORM Reset Polarity NORM Maintenance OFF HJ 653 YES EUMILRNFPDCT 111111111111 AP 000150 Baud Rate 9600 Printer Report 2 e3 00 000 e4 15 000 Channel 1 2 3 4 5 6 Sensor ID 255 255 255 255 255 18 Channel ID 255 255 255 255 255 254 Name XXXXX XXXXX XXXXX RH XXXXX AT Units XXX XXX XXX XXX C Prec 0 0 0 0 0 1 FS Volts 01 000 01 000 01 000 00 500 01 000 01 000 Mult 000001 000001 000001 32 258 ...

Страница 86: ...SV download of the file 6 4 last data record from the BAM 1020 such as might be retrieved by an external digital data logger on an hourly basis This file download does not reset the data pointer 1 A series of three carriage returns is sent to the BAM through the serial port The BAM responds with a single asterisk indicating that communication is established 2 An ASCII character 6 is sent to the BA...

Страница 87: ...ts 6 Display New Flow Stats 7 Display All 5 Min Flow 8 Display New 5 Min Flow 3 Display CSV Data Station 5 Time Conc mg m3 Qtot m3 WS MPS WD DEG BP mm RH Delta C AT C E U M I L R N F P D C T 10 02 07 17 45 0 001 0 700 0 110 0 0 36 1 3 23 0 0 0 0 0 0 0 0 0 0 0 0 0 10 02 07 18 00 0 001 0 700 0 127 0 0 38 1 4 23 2 0 0 0 0 0 0 0 0 0 0 0 0 10 02 07 18 15 0 001 0 700 0 130 0 0 38 1 2 23 6 0 0 0 0 0 0 0 ...

Страница 88: ...files are not available except on BAM units configured as FEM PM2 5 units A BX 596 sensor is required Field Description Time Event time stamp in seconds since January 1 1970 00 00 00 Flow 5 Minute average flow rate for the BAM sample period AT 5 Minute average ambient temperature for the BAM sample period BP 5 Minute average ambient pressure for the BAM sample period File 7 Display Last 100 Errors...

Страница 89: ...s Advanced use only r XMODEM Real Time Value Download This command is only used by special software to scan instantaneous values of sensors alarms and settings Requires software handshaking Advanced use only x XMODEM EEPROM Value Download This command allows quick scanning of non volatile memory for diagnostic purposed Advanced use only z Enable concentration report to PRINTER output This command ...

Страница 90: ...h a terminal program such as HyperTerminal or ProComm Plus you will need to define the serial port configuration in the setup of the program Set the baud rate to 9600 with 8 data bits no parity and 1 stop bit Use the terminal program s internal dialing command sequence to dial up the BAM 1020 Verify the connection to the BAM 1020 by pressing the Enter key at least three times until the command pro...

Страница 91: ...rogram the main EEPROM firmware to the latest revision through the serial port using the Flash Update Utility Units which currently run firmware revision 3 0 or later already have a flash compatible EEPROM If the BAM 1020 has old revision 2 58 or earlier firmware then you will need to physically replace the EEPROM chip with a flash compatible chip available from Met One You will need a computer or...

Страница 92: ...xecutable installer file to the appropriate computer if needed then run the exe program to extract and install the Firmware Update Utility The installer will guide you through the installation steps 4 Connect the COM port of the computer usually COM 1 to the RS 232 port on the BAM 1020 with the standard BAM serial cable The BAM 1020 should be set to 9600 baud in the SETUP menu The BAM must be powe...

Страница 93: ...ally reset by sending an escape command through the serial port Note The REPORT port on the optional Report Processor back panel uses different pointer reset commands See the BX 965 manual The reset command is esc FH cr where esc is the esc key F is the desired file number of 3 data log file 6 flow stats file or 8 5 min flow file H is the number of hours back from current to set the pointer 1 to 9...

Страница 94: ...the BAM memory in comma separated format The available Query commands are listed below Escape Command Description Esc QC enter Custom Query output Data is formatted exactly as specified in the SETUP QUERY screen All values are in comma separated format with a fixed width of 7 characters per field excluding commas Esc QCH enter Data header for the custom Query output Esc Q enter Standard Query outp...

Страница 95: ... Alarm 8 P Pressure Drop Alarm 16 F Flow Errors 32 N Nozzle Error 64 R Reference Error Membrane Timeout 128 L Power Failure 256 I Internal Error Coarse Link Down 512 M Maintenance Flag 1024 U Telemetry Fault 2048 E External Reset Error A data integrity checksum is included at the end of each Query array after the delimiter asterisk character The checksum is the 16 bit arithmetic sum of all charact...

Страница 96: ...O Ring Grease mini packets 995712 Calibration Service Tools Description Part Number Graphic BAM 1020 Basic Service Tool Kit Includes nozzle shims reel spacer filter sensor removal tool dark test shim rubber leak check tool hex wrenches BX 308 BAM 1020 Distributor Service Tool Kit Includes all of the above plus two spring scales BX 308 1 BAM Inlet Cleaning Kit Includes pull rope tube brush microfib...

Страница 97: ...0 60 Hz BX 121 Pump Gast Rotary Vane 220 240 VAC 50 60 Hz BX 122 Muffler Medo Gast Pump Replacement 580293 Gast Pump Rebuild Kit Vanes filters 680828 Medo Pump Rebuild Kit Piston filters 680839 Pump Service Kit Filter Replacement Medo 8588 Pump Controller Relay Module Only Medo BX 139 Pump Controller Relay Module Only Gast BX 139 1 Flow System Components Description Part Number Graphic Flow Sensor...

Страница 98: ... 1 Front Door Assembly BAM 1020 Standard Version 9628 Rear Panel Assembly 80679 Fuse 3 15A 250V 5x20mm 2 Required 590811 Motor with gear box 4 RPM 4 per unit 8105 2 Motor with gear box 10 RPM Capstan Drive Only 8106 1 Inlet Components Description Part Number Graphic PM10 Size Selective Inlet Head EPA Specified BX 802 TSP Sampling Inlet with insect screen BX 803 PM2 5 WINS Impactor BX 804 PM2 5 Sha...

Страница 99: ...ement with Cable 230 VAC 81121 Smart Heater Insulating Sleeve White 9123 1 External Heater Relay with Enclosure 80316 O Rings BX 807 SCC Cyclone set of 6 720097 O Rings BX 808 VSCC Cyclone set of 8 720105 O Rings BX 809 URG Cyclone set of 6 720228 O Rings PM10 Head set of 3 8965 Meteorological Sensors Description Part Number Graphic 590 Wind Direction Sensor Auto ID BX 590 591 Wind Speed Sensor Au...

Страница 100: ...One for upgrade details Required for PM Coarse Configuration BX 965 Modem Kit for BAM 1020 BX 996 Cellular IP Modem Kit for BAM 1020 BX 911 BAM 1020 Serial Cable DB 9 Female Ends Null 400658 Belkin F5U109 USB to RS 232 Adapter 550067 Serial Printer Kit BX 601 Converter for Parallel Printers BX 602 Weatherproof Mini Shelters Enclosures Description Part Number Graphic Mini Enclosure Heated and Vente...

Страница 101: ... statistics The channel 7 pressure signal is not logged in the standard BAM data arrays In order to log the barometric pressure from the BX 596 you must jumper the channel 7 signal terminal over to another unused channel input with a short wire Then you must manually scale the second channel with the multiplier offset and full scale voltage of the BX 596 as shown below BX 596 1 is an special exten...

Страница 102: ...reen BX 596 Temperature Baro Combo Sensor BX 597 Temp Baro RH Combo Sensor Terminal Block Cable Wire Color Terminal Block Cable Wire Color Channel 6 SIG Yellow AT Channel 6 SIG Blue AT Channel 6 COM Black Shield Channel 6 COM Black Shield Channel 6 POWER Red Channel 6 POWER Red Channel 6 ID Green Channel 6 ID Green Channel 7 SIG White BP Channel 7 SIG White BP Channel 1 3 SIG Brown RH The BX 597 R...

Страница 103: ... spot area cm2 𝜇 is the beta ray absorption cross section cm2 mg The absorption cross section 𝜇 to a very good approximation depends only on the mass of the absorbing species and not on its chemical composition In other words the absorption cross sections for commonly found species in ambient particulate matter such as soot iron oxide silica or salt are all approximately the same It is for this re...

Страница 104: ...tely measure volume 11 1 Converting Data Between EPA Standard and Actual Conditions The BAM 1020 is always sampling under actual flow conditions The BAM 1020 may however be set to report concentrations under either actual flow conditions or standard flow conditions The difference between these two values corresponds to the change in volume between a BAM 1020 sample taken under actual conditions an...

Страница 105: ... have a data value of 27 g from a BAM which was configured to report data in EPA Standard conditions 298K and 760 mmHg but you need to know what the concentration would have been in actual conditions The actual average temperature for the hour in question was 303K and the average pressure was 720mmHg Camb Cstd Pamb Pstd Tstd Tamb Camb 27 720 760 298 303 Camb 27 0 9474 0 9835 Camb 25 1 g ...

Страница 106: ...nical Audits Pump muffler unclogged as found as left PM10 particle trap clean as found as left N A Sample nozzle clean as found as left PM10 drip jar empty as found as left N A Tape support vane clean as found as left PM10 bug screen clear as found as left N A Capstan shaft clean as found as left PM2 5 particle trap clean as found as left N A Rubber pinch rollers clean as found as left Inlet tube ...

Страница 107: ...e FLOW TYPE AP RS232 baud Cv Password STATION Qo Cycle Mode RANGE ABS RH Control BAM SAMPLE sw RH Set point MET SAMPLE K Factor Datalog RH OFFSET BKGD Delta T Control CONC UNITS STD TEMP Delta T Set point COUNT TIME HEATER Datalog Delta T FLOW RATE e1 CONC TYPE Errors Last 6 Errors in BAM 1020 Error Log Error Date Time Error Date Time 1 4 2 5 3 6 Audit Notes ...

Страница 108: ...BAM 1020 9800 Manual Rev W docx Page 108 Manual Notes ...

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