Bios Met Lab Series ML-500 User Manual
Contents
1. Temperature G oF Standardized Temperature Setting 0 C 0 0 50 0 C Date Format MM DT YR DT MM YR Time Format AM PM 24 Hr Connecting the ML 500 to a Gas Flow Source The accuracy of the ML 500 is dependent upon its source being stable An unstable flow source may produce inconsistent readings Flow direction is indicated by the arrow on the top of the flow cell To use a pressure flow source connect to the inlet fitting or to use a vacuum flow source connect to the outlet fitting The M 500 is designed to be used at ambient pressures Do not subject the ML 500 to a pressure 2 PSI higher or lower then atmospheric pressure This is easily accomplished by leaving the outlet of the flow cell open to atmosphere for pressure applications or the inlet outlet open to atmosphere in vacuum scenarios If tubing is needed to exhaust test gases to a fume hood insure that the exhaust tubing is of sufficient diameter such that the pressure to the ML 500 calibrator does not exceed 2 PSI Taking Readings The ML 500 default is preset for ten 10 readings in an averaging sequence This parameter is user definable see Setup Menu 2 Reading Type in Average amp Min Reading 1 Press Enter Read or Auto to enter the Run Menu e Press the Read button to initiate a single reading e Press the Auto button to initiate continuous hands free readings e Press the Stop button to stop current flow reading and open valve e Press the Reset2. Your ML 500 is engineered to provide years of reliable service with appropriate care and maintenance Bios recommends an annual calibration by our ISO 17025 accredited laboratory to help ensure the best possible flow measurements and to provide a bullet proof audit trail for those applications subject to regulatory requirements If you should encounter any problems with your ML 500 immediately contact Bios Customer Service and provide a detailed description of your situation including ML 500 model and serial number information about the flow source and the current calibration setup environmental conditions during the test the flow point or points that you re checking and an explanation of the issue you re experiencing Recertification Your ML 500 primary piston prover is a precision measuring standard comprised of moving parts that are machined to extremely close tolerances Additionally various environmental factors product wear drift of the temperature sensors and pressure transducers or inadvertent damage may adversely affect your ML 500 s measurement accuracy or general performance For these reasons Bios highly recommends having your ML 500 annually verified by our ISO 17025 accredited laboratory in order to ensure its measurement integrity For those applications subject to regulatory or ISO require ments verification by our accredited laboratory provides you with a defensible audit trail of the highest quality As the ultimate qu
3. button to clear the display of current data Setting User Preferences The ML 500 offers enhanced electronics options to allow the user to define parameters specific to an application There are six Setup Menus General Menu Navigation Use the Up Down arrows to navigate between different lines within a menu Use the Enter button to select a field to be modified and to lock in any changes Use the keypad for data entry such as the number of readings in an averaging sequence use the Up Down arrows to toggle between fields such as Temperature or Pressure units Use the Fwd and Back keys to advance to the following menu or return to the previous menu Keypad Function The keypad is used for numeric character entry When pressed each alphanumeric button will display its corresponding number To go back use the back arrow The ML 500 will overwrite previous entries Use the Enter key to lock in any selections To enter Setup Menu 1 from the Main Menu select Setup and press Enter Setup Menu 1 Sensor Factor Calibration Type Option 1 Sensor Factor As applicable change the Sensor Factor from its default value of 1 000 to the value provided by the MFC or MFM manufacturer see Using Sensor Factors Option 2 Cal Type This option changes the sample type being displayed Toggles between std standardized readings and vol volumetric readings Setup Menu 2 Reading Type in Average a
4. 30 C Storage Temperature 0 70 C Ambient Humidity 0 70 non condensing Display Backlit LCD Operating Pressure Absolute 15 PSI Data Port Serial Warranty 1 year battery 6 months Bios highly recommends annual Recertification product maintenance pre and post dynamic flow comparisons and full dimensional calibration This is elective and is not included as a warranty item All specifications are subject to change Please contact Bios or visit our web site at www biosint com for the most current product information Limited Warranty The Bios Met Lab Series ML 500 is warranted to the original end user to be free from defects in materials and workmanship under normal use and service for a period of one year from the date of purchase as shown on the purchaser s receipt The Bios Met Lab Series ML 500 s battery is warranted for six months from the original purchase date If the unit was purchased from an authorized reseller a copy of an invoice or packing slip showing the date of purchase may be required to obtain warranty service The obligation of Bios International Corporation under this warranty shall be limited to repair or replacement at our option during the warranty period of any part that proves defective in material or workmanship under normal use and service provided the product is returned to Bios International Corporation transportation charges prepaid Notwithstanding the foregoing Bios International Corporatio
5. Bios Met Lab Series ML 500 User Manual Bios Driving a Higher Standard in Flow Measurement Table of Contents aha ao Do LE Kota Kol n aa E ATT A A E egannannnndnedunsashnnhaudencuen OE TO A 2 About Your M pO O raaraa kukuwa a aaa aaa aaa KWAKU Ku Ku aAa aaa a aa aaa aaa www a aAa aa aaa aaa aa aaa aaa Aaaa aam waa 2 Theory oft Operati AAA NAA MAA AAA AA AAA E RE N E NANA AAA AAA 2 Unpacking Checklist ia ia ascend ee nc dae een ceeded aren eee Baka kaakaa 4 Warnings ssa cts gest ces arate eda aa a AAA hanna an A UA avn nee eres AA E eines ad nie edo pene 4 Operating YOUFIML D00 6a ccsccciaccccssiscsasessiccacsnessaseces succdwed sbeasasevenadscnssccnesasdedussebanses sissies sdecseseasacedecsadnseisccadassiexeteasdaxdess 5 LE YA WA La Yo EA Ya ai e AE E AAA AAA AAA AAA WAA AAA Meaenadedagvat E 5 Turning the ML 500 0nie aa aw kik dean decd dedi ae eA dread an Adee 5 ME DDS ACK GAC ss cc atsa hc a caeca sy andacse renee eoaasergy ite athacevperssachutteat jams SAW va MAMAA WA bed SA UPE AA SAA MAKABE MO MAMAA NA Aa MSHANA MUCE AA WAA WAPI MAA UP 5 Low Battery Indi ka 5 Using the ML 500 Keypad aviccccesesetectesisiciicctetaiiieecteesviveddaesiedcadustuetscucesaseschieudedertacedusbustuuatscasestexeuddsdasidaddssavvibenueessss 6 General Menu Navigation WA ka aidan aaa aay cain dee a eee 6 Keypad FUNGUA seriene cantata ENE ai 6 ME 500 Men Tree sist iccwedenetewansnnndntnnntinanty suanacenessecunnnaendnnndunnanenestedanttencannudnaus
6. accurate results will be obtained Calculate the PTVM by taking the ratio of the viscosity of nitrogen to the viscosity of the gas under test For example to calibrate hydrogen consider the following at 0 OC the viscosity of nitrogen is 165 31 microPoise and the viscosity of hydrogen is 83 21 microPoise Express these as 165 31 83 21 or 1 987 and enter 1 987 as the Piston Tare Value Multiplier PTVM for this cell When measuring alternate gases at flows below 20 ccm or for absolute best accuracy it may be necessary to perform a dynamic leak test using the gas under test Contact Bios for information on this test Option 1 PTV Piston Tare Value This is the unique piston tare value of a particular flow cell It is factored into each flow reading for leakage independent measurements The piston tare value is factory set and non adjustable Option 2 PTVM Piston Tare Value Multiplier This is the adjustable piston tare value multiplier used to adjust the piston tare value to enhance accuracy at lower flows when using gasses other than nitrogen or air The piston tare value multiplier s factory setting is 1 000 although it may be changed to any value between 0 200 and 3 00 if gasses other then air or nitrogen are used Using Sensor Factors When calibrating an MFC or MFM using a surrogate or proxy gas meaning the MFC or MFM was originally calibrated by the manufacturer for a gas other than what you are currently using the rea
7. adapter charger to the ML 500 s charging jack and then plugging it into a standard wall outlet Initial charging should take approximately eight hours After initial charging you may continue to charge your ML 500 indefinitely by leaving it connected to the power supply Otherwise make sure to fully charge your ML 500 at least once every three months to help maintain battery life On bases manufactured after January 2008 a small cooling fan was added for improved performance The fan operates when the base is connected to the charger Turning the ML 500 On amp Off Press On to start the ML 500 An opening screen will appear indicating the instrument s revision level followed by the Main Menu The ML 500 has a battery saving automatic shut off system After 65 minutes of inactivity the ML 500 will shut off Alter natively the unit can be shut off manually by pressing the Reset button followed by the number 0 from the Main Menu LCD Backlight The ML 500 s LCD display includes a backlight function to illuminate the display The default setting for the backlight is always on If you wish to conserve battery power you may wish to turn the backlight off or enable the backlight only when inputting information on the keypad To turn the backlight off from the Main Menu press the Light button one time To enable the backlight only when inputting information on the keypad press the Light button a second time To return to the d
8. ality assurance measure as well as to keep your ML 500 in top condition and updated with the latest hardware and firmware upgrades as available Bios offers our elective Recertification program Recertification is an intensive service and calibration package that provides pre and post dynamic flow comparisons against our Proven DryCal Technology lab standard complete product refurbishment including cleaning of the piston and glass assembly installation of any available upgrades and other routine and preventative maintenance items and full dimensional cal ibration comprised of 20 or more tests using precision instruments and gauges such as depth and laser micrometers and a temperature bath When completed you receive NIST traceable ISO 17025 ANSI Z 540 and NIST Handbook 150 backed calibration certificates Recertification includes a 90 day service warranty should any related labor or parts replacements prove faulty Due to the intensive nature of our ML 500 Recertification the time spent within our New Jersey facility during this process is generally fourteen days beginning from the day we receive your product For a detailed explanation of our Recertification process our laboratory and our accreditation please visit our website at www biosint com and visit the Service amp Support page Sending Your ML 500 to Bios Please contact Bios for an RMA return merchandise authorization number before sending your ML 500 to our factory fo
9. and to lock in any changes e Use either the keypad or the Up Down arrows to modify the desired field e Use the Fwd and Back keys to advance to the following menu or return to the previous menu Error Messages Cell is not present or unit does not see cell Piston did not return to bottom of cell properly To exit press Back or wait to return to Main Menu To exit press any key Installing 8 Removing Flow Cells The ML 500 accepts interchangeable ML 500 only flow cells for different flow ranges If the user attempts to enter the Run Menu prior to installing a flow cell the unit indicates No Cell and returns to the Main Menu after a 5 second delay Installing Flow Cells 1 Position the selected flow cell into the base opening its top label facing you 2 Turn the cell back and forth to locate the guide pins when the guide pins are engaged press down 3 When powered on the ML 500 senses which cell is installed and displays the appropriate units for that cell Removing Flow Cells Grasp the flow cell firmly hold the base in place and lift upwards Factory Default Settings The ML 500 has a number of user definable features and settings To return to factory default settings at any time press Reset followed by Save from the Main Menu Parameters Factory Settings Optional Settings No of Readings in an Averaging Sequence 10 1 100 Atmospheric Pressure mm Hg mBar kPa PSI
10. ding of the ML 500 can be scaled by the sensor factor to allow for this To enable your ML 500 to scale its actual flow measurements to match the adjusted flow from the MFC or MFM input the sensor factor into the ML 500 before calibrating the MFC or MFM see SETUP Readings The Sensor Factor is displayed on the run screen of the ML 500 as SF X XXX The default setting is 1 000 Because a sensor factor other than your ML 500 s default value of 1 000 modifies the actual flow to a reported flow make sure to change this setting back to 1 000 when a calibration involving the use of a sensor factor is completed Leak Testing To ensure proper function of the ML 500 annual factory calibration is recommended However a quality assurance self test feature is provided to verify proper integrity of the flow cell It is recommended that the self check leakage test be conducted periodically as part of an ongoing quality assurance program Passing the leak test does not ensure proper function of the ML 500 although it does ensure that total leakage is within the product s allowable limits The leak test may take as long as 6 hours or more to complete per fitting Since the leak test may take several hours it is recommended to plug the charger into the base during the leak test to prevent unit from turning off When performing the leak test procedure note the inlet and outlet leakage If the inlet and outlet leakage do not agree within 50 of each othe
11. ds free continuous auto read mode The ML 500 can be programmed for up to 100 readings in an averaging sequence Theory of Operation The versatile ML 500 can be used to measure the gas flow rates of both pressure and vacuum flow sources Its Proven DryCal Technology features a near frictionless piston and flow cell design that is primary highly accurate and liquid free for primary flow measurements of unequaled speed and convenience For more information about our patented DryCal Technology please visit our website at www biosint com The ML 500 consists of two primary components The base and the flow cell there are three interchangeable flow cell models each with a designated flow range The flow cell plugs into the base unit in order to create a complete functional ML 500 system Neither component can operate independently The base component houses the main computer and timing crystal The flow cell is easily fitted into the base unit s 9 pin connector and two guide pins The flow cell performs the actual flow measurements For this purpose it houses a piston and glass assembly comprised of a borosilicate glass tube housing a precision machined piston The flow cell also contains an integrated temperature sensor and barometric pressure transducer in the gas flow stream for instant conversion of the volumetric readings into standardized flow The ML 500 can be set to take flow measurements manually one reading at a time or auto
12. efault setting always on press the Light button a third time Low Battery Indicator A low battery condition is indicated by a B appearing in the upper right hand corner of the LCD The low battery indicator allows the user to connect to an external power source prior to the unit powering down Time between low battery indication and loss of power varies depending on the current application ML 500 Keypad Power button 65 minutes auto shut off Backlight Back GCE Menu navigation Use for data entry DOWN o oa Product functions Using the ML 500 Keypad General Menu Navigation Use the Up Down arrows to navigate between different lines within a menu Use the Enter button to select a field to be modified and to lock in any changes Use the keypad for data entry such as entering standard temperature conditions use the Up Down arrows to toggle between fields such as Temperature or Pressure units Use the Fwd and Back keys to advance to the following menu or return to the previous menu Keypad Function The keypad is used for both numeric character entry When pressed each alphanumeric button will display its corresponding number To go back use the back arrow The ML 500 will overwrite previous entries Use the Enter key to lock in any selections e Reset Button Clears both the current reading and the group average and opens the valve allowing the piston to return to its resting state e Stop Button Stops c
13. elephone or email we ll issue you an RMA number for the prompt return of your ML 500 for evaluation Please note that Bios will make every attempt to verify your issue as we want you to get the most out of your ML 500 However if we are unable to detect a product issue or if we determine that the issue is application related rather than product related we reserve the right to charge an evaluation fee Shipping When shipping your ML 500 please ensure that the packaging is adequate to protect the instrument Whenever possible your ML 500 should be shipped in its original packaging or within a hard case such as a Pelican carrying case available for purchase from Bios We highly recommend using a standard freight carrier e g FedEx UPS that supplies tracking numbers and insuring the product against damage in transit Bios is generally not responsible for freight cost associated with shipments to and from Bios except in certain instances please contact Bios for information before initiating a shipment Bios is not responsible for damage that occurs during shipment Storage If you need to store your ML 500 for an extended period please follow these guidelines Always store it in a clean dry place If possible leave it attached to its AC power adapter charger while in storage If your ML 500 cannot be attached to its AC power adapter charger while in storage Fully charge it before extended storage If the battery isn t fully c
14. harged prior to storage it might be permanently damaged Fully charge it at least once every three months When removing your ML 500 from storage recharge the battery for at least 12 hours prior to use Bios Met Lab Series ML 500 Specifications Interchangeable Flow Cell Models Model ML 500 10 ML 500 24 ML 500 44 Flow Range 5 500 sccm 50 5 000 sccm 500 50 000 sccm Accuracy Standardized 0 40 0 35 0 40 Accuracy Volumetric 0 25 0 20 0 25 Time Per Reading 1 80 seconds 1 50 seconds 1 20 seconds Weight 85 1 oz 2412 5 g 86 oz 2439 3 g 88 4 oz 2507 g Specifications based on averaged readings Accuracy is stated as a percent of reading including standardization if applicable Basics Dimensions Base H x W x D 3 9 x 5 25 x 10 67 in 99 x 133 x 271 mm Dimensions Cell H x W x D 10 15 x 6 x 4 in 258 x 152 x 102 mm Weight Base 43 5 oz 1233 g Gas Compatibility Non corrosive non condensing non combustible gasses Less than 70 humidity Usage Flow Mode Suction and Pressure Configuration Base with modular interchangeable flow cells three Temperature amp Pressure Sensors Yes in the flow stream of each interchangeable flow cell Reading Modes Single Auto or User Specified Burst AC Adapter Plug 12V DC gt 500 ma 2 5 mm center positive North American standard others available Battery Type 6 volt lead acid Inlet and Outlet Fittings Swagelok Ambient Temperature 15
15. matically in the Auto Read mode for hands free continuous measurements The ML 500 can be programmed for up to 100 readings in an averaging sequence The ML 500 includes an RS 232 port serial port cable and free Bios Optimizer Collect Light software to enable calibration data to be downloaded to a Microsoft Excel spreadsheet Bios Optimizer Collect Light may be upgraded to Optimizer Collect in order to obtain greater functionality please contact Bios for information gt Vent Cylinder K Pa 34 Light Photodiode Emitter Collimator YA Bypass Valve Inventory Volume Temperature Transducer Absolute Transducer Inlet Filter Figure 1 Primary Piston Prover An idealized piston prover would consist of a massless frictionless leakproof shape invariant and impermeable piston inserted within the flow stream and enclosed by a perfect cylinder Figure 1 The time that the piston takes to move a known distance which implies a known volume then yields the volumetric flow as q v t nrh t Where q volumetric flow rate v measurement volume t measurement time r radius h measurement path length Such a device would be as accurate as its physical dimensions and its clock with almost insignificant drift mechanisms Although such idealized devices do not exist we believe that DryCal Technology offers close to ideal performance Gas Inlet Gas Outlet Cell Connect
16. mp Minutes Reading Option 1 Reading Type Toggles between Cont continuous auto read and Burst performs continuous auto read then stops after the quantity in averaging sequence is reached as programmed in Setup Menu 2 Option 2 in Average Option 2 in Average Changes the quantity in an averaging sequence consecutive readings from 1 100 Option 3 Min Reading Specifies the time interval in minutes between flow readings Setup Menu 3 Pres Units Temp Units Temp Corr Option 1 Pres Units This option allows you to toggle between mmHg mBar kPa and PSI Option 2 Temp Units This option allows you to set the temperature units for F or C Option 3 Temp Corr This option is used to set the standardization temperature Setup Menu 4 Date Time amp Battery Voltage This menu has an alternate navigation method Within this menu use the Fwd and Back arrows to select each option such as Month or Day To change a selected option use the Up Down arrows Date and time formats are specified using Setup Menu 5 Date and Time Formats Option 1 Date This option allows you to set the date Option 2 Time This option allows you to set the time Setup Menu 5 Date amp Time Formats Option 1 Date Toggles between MT DT YR or DT MT YR date format Option 2 Time Toggles between AM PM or 24 Hr time forma
17. n shall have no liability to repair or replace any Bios International Corporation product 1 That has been damaged following sale including but not limited to damage resulting from improper electrical voltages or currents defacement misuse abuse neglect accident fire flood terrorism act of God or use in violation of the instructions furnished by Bios International Corporation 2 When the serial number has been altered or removed or 3 That has been repaired altered or maintained by any person or party other than Bios International Corporation s own service facility or a Bios authorized service center should one be established This warranty is in lieu of all other warranties and all other obligations or liabilities arising as a result of any defect or deficiency of the product whether in contract or in tort or otherwise All other warranties expressed or implied including any implied warranties of merchantability and fitness for a particular purpose are specifically excluded In no event shall Bios be liable for any special incidental or consequential damages for breach of this or any other warranty express or implied whatsoever Bios Bios International Corporation 10 Park Place Butler NJ USA 07405 Phone 973 492 8400 Toll Free 800 663 4977 Fax 973 492 8270 Email sales biosint com web www biosint com 2009 Bios International Corporation MK01 32 Rev E 18
18. onaas Gpesdedyiacie E EE 16 Bios Met Lab Series ML 500 Specifications ccccccssssseeeesessseeeeeseeeeseeeseseeeeeeseseesneeeessoaeeseeseeoesneeeesseasseneeseoenenees 17 Limited Wana n ya IOSA sdcuadadadcuavedtesvidiveusiaesds doveduddacereddsiesiveedieisees 18 Accuracy i Reliability Convenience Introduction Congratulations You ve chosen the Bios Met Lab Series ML 500 featuring Proven DryCal Technology The ML 500 offers you 0 25 of reading volumetric 0 40 of reading standardized accuracy within a portable primary standard that s ideal for both volumetric and mass flow applications where a high degree of measurement accuracy is required Before you get started we recommend taking a few moments to review this manual and familiarize yourself with the ML 500 If at any time you have questions regarding its operation please contact Bios through our web site www biosint com or call us at 973 492 8400 to speak with one of our knowledgeable customer support representatives About Your ML 500 The ML 500 is a positive displacement primary piston prover for gas flow measurements in either pressure or vacuum applications Using Proven DryCal Technology it combines the accuracy of a primary standard with unequaled speed and convenience Volumetric or standardized flow readings are obtained with the push of a button The ML 500 can be set to take flow readings manually one reading at a time or automatically in the han
19. or Guide Pins Base Connector Serial Port Charging Jack Reset Back and Side Front and Side Unpacking Checklist Your ML 500 has been packaged with care and includes all components necessary for complete operation Please take a moment to check that you have received the following items If you believe you have not received a full shipment or if you have any questions please contact Bios immediately Your ML 500 Base with the following Your ML 500 Flow Cell Includes e ML 500 Electronic Base e ML 500 Flow Cell e Battery Charger e Leak Test Plug e Leak Test Cable e Certificate of Calibration e Optimizer Software CD Rom e RS 232 Cable e Instruction Manual e Certificate of Calibration Warnings A The ML 500 is not rated intrinsically safe and is not for use with explosive gasses or for use in explosive environments A The ML 500 is not designed for pressurization above 2 PSI or for gas flows above the rated specifications of the flow cell in use Please consult the product specification on the inside front cover of the manual for more information regarding acceptable gas flow ranges or visit our website at www drycal com for the most current product specifications A For use with clean laboratory air or other inert non corrosive gasses only Operating Your ML 500 Getting Started Although the ML 500 s battery comes charged from the factory we recommend fully charging your new battery by connecting the AC power
20. r assure that the inlet and outlet Fittings are tight then repeat the leak test procedure If the problem persists please contact Bios The maximum leakage limits are 200 ccm for the ML 500 10 1 000 ccm for the ML 500 24 and 3 000 ccm for the ML 500 44 If the leakage exceeds the maximum limits repeat the leak test procedure If the problem persists please contact Bios for assistance To Initiate the Leak Test 1 Place the ML 500 on a flat vibration free surface 2 While in the Main Menu install the leak test cable included with the ML 500 base unit between the 9 pin ML 500 Base Connector and the 9 pin Cell Connector 3 From the Main Menu remove the cell and select Leak Test 4 After a leak test is initiated the display will read 5 Place the leak test plug over either the inlet or the outlet port fitting on the ML 500 flow cell 6 Invert the ML 500 flow cell 7 Push any key to commence the leak test At this point the ML 500 will time the descent of the piston The leak test may take up to 6 hours to complete The display will read 8 If the test is completed successfully a leakage rate will be displayed The display will appear similar to the following 9 Repeat the procedure with the leak test port cap over the opposite port fitting Leak Test Setup Inverted Cell Leak Test Plug i S Ya Swagelok Fitting Leak Test Cable Annual Maintenance and Calibration
21. r elective Recertification or other service You can get an RMA number through our automated web based system at at www biosint com ContactUs rmaform aspx by emailing service biosint com or by calling us directly at 973 492 8400 Please make sure to check out our Bios Quality Service and Calibration document located through the Service amp Support page on our web site This document provides full RMA procedures and other useful information to assist you in this important process Sending your ML 500 to Bios without an RMA number may result in return of the instrument without inspection or a substantial delay in service turnaround time When requesting your RMA number provide your ML 500 model serial number and revision level Also describe any product issues you may be experiencing Please keep in mind that Bios will not begin evaluation and service of your ML 500 until you have accepted and approved in writing our formal RMA quote for service This protects both you and Bios during this process and ensures a fair and efficient service experience If sending your ML 500 for repair or evaluation rather than elective Recertification please contact Bios for technical support or troubleshooting assistance prior to shipping the unit We will first attempt to resolve the situation over the phone or via email If you ve provided us with a detailed description of your ML 500 issue and application details and we re unable to resolve the situation by t
22. t Option 3 Auto Off Toggles between Enable or Disable 65 minute auto shut off Setup Menu 6 Piston Tare Value PTV and Piston Tare Value Multiplier PTVM PTV stands for Piston Tare Value this is the amount of gas that passes around the piston during measurement All Bios calibration equipment has a factory set Piston Tare Value that is stored in the memory of the DryCal cell The value is typically very small 0 1 ccm for low flow cells 0 2 ccm for medium flow cells and 1 4 ccm for the high flow cells We adjust for this leakage by adding the Piston Tare Value PTV to the measurements On our highest accuracy instruments we allow for the adjustment of the Piston Tare Value with the Piston Tare Value Multiplier PTVM When using the instrument with gas species other then air or nitrogen the molecular behaviors of these gases may degrade the Piston Tare Value For highest accuracy the instrument s Piston Tare Value PTV can be adjusted Adjusting the Piston Tare Value is accomplished by entering a new Piston Tare Value Multiplier PTVM The Piston Tare Value Multiplier is multiplied to the Piston Tare Value and used to adjust the measurement the default value for air and nitrogen is 1 000 The Piston Tare Value Multiplier PTVM can be set to any value from 3 000 to 0 2000 For flows above 20 ccm a new a Piston Tare Value Multiplier PTVM value can be calculated by using the viscosity of the gas being measured and
23. tntuusanvanssattentunceausnunusintaxxbanterstenedenccdaaa 7 Error Mes530 S kui ah stead ENA E aaas a oake aE NEA fated 8 Installing amp Removing Flow Cells ccccseeseeeeeeseeseeneeeseeneneeesceeeeseeeseseasaeeeseseeasneeesceeeeaseesoeoasaeseessoasseneeseuensneeesoagonnees 9 Factory Default Settings iwa kaki raaa nkaka Kawa Kwa Kaadaa Ta aaa Eaa aaa AALAN Aaa Ka Lwa wa UASU ka kaaa kulawa la kaaba 9 Connecting the ML 500 to a Gas Flow Source cccccseeseeceeeseesneneeseeeeenseeseeeeseeeeeseasseneeeeeanssseessooassseesesoasneeesssoasnnneeses 9 Tea UGG Ya NA SAAANA AA AAA AAA ANA Aaa Saarien aie AAA AAA AAA AWA ANA AA AA AE 10 Setting User Preferences isenana dete a vats edau sa veveuwentsdexecunnduvacts dada lahbib annaa daaa adanada dA Taan dn Nenana atanan Sai rsd aa Daaa aE 10 e e ET A Eeo p A E E A A E E E A causeudesvevedausechicoseiisieicauaddesdteseuuasucetedsavetseidasavuces 13 MSAK TSUN e KAA WAA MASTAA AKA AAA AAA AA KA AAA AE AAA AA T 13 Annual Maintenance and Calibration cccccceeeeeee eens sees wananunua nu nakaa Aaaa AE KAWI KUKAAA KUKAAA eee eee eee KUKAAA eee 15 RE a adeetyS aaa ducts cavh att bens aed aa ae tse chsuelacedgenstseviagnd a EAE 15 Sending Your ML 500 to BIS aa iwa UA cfs iacheeelan cian Aanivnete ened adage antes Rane aAA Eiaa 16 SIPPING PEER E AEE T E E E aana amma Wa ji Ui MBA POA YAA mai Avaa beanadecedbdetaahsdacedsleteatsfgaadelessetadecetuleraceatecadnyvane 16 AA Ya ya Ya AA E AAA E EA AE AA T A q
24. urrent reading and opens the valve allowing the piston to return to its resting state e Auto Button Initiates automatic readings must be accessed from the Run Menu If the Reading type has been set to Cont in Setup Menu 2 the unit will run until the preset average is reached and then restart the cycle If the Reading type has been set to Burst in Setup Menu 2 the unit will run until the preset average is reached and then stop e Read Button Initiates a single reading must be accessed from the Run Menu ML 500 Menu Tree gt Forward navigation Backward navigation Press Fwd arrow after Menu 6 to return to Main Menu mwmremrmrererererererererererwrerererererererereere2e 9 e Use the Up Down arrows to navigate between different lines e Use the Enter button to select a field to be modified depending on the function and to lock in any changes e Use either the keypad or the Up Down arrows to modify the desired field e Use the Fwd and Back keys to advance to the following menu or return to the previous menu Q ML 500 Menu Tree Forward navigation Backward navigation e To exit at any time press Reset b a e Use the Up Down arrows to navigate between different lines e Use the Enter button to select a field to be modified depending on the function
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