ML-800 User Manual
Contents
1. 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 format 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 Mesa calibration equipment has a factory set Piston Tare Value that is stored in the memory of the Bios DryCal cell PTV stands for Piston Tare Value this is the amount of gas that passes around the piston during measurement The value is typically very small 0 008 ccm for the ultra low flow cells 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 t2. re checking and an explanation of the issue you re experiencing Recertification Your ML 800 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 800 s measurement accuracy or general performance For these reasons Mesa highly recommends having your ML 800 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 quality assurance measure as well as to keep your ML 800 in top condition and updated with the latest hardware and firmware upgrades as available Mesa offers our elective Recertification program Recertification is an in tensive service and calibration package that provides pre and post dynamic flow comparisons against our Proven Bios 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 a
3. Bios DryCal TECHNOLOGY ML 800 User Manual MesaLabs MesaLabs Mesa s Commitment As a manufacturer of critical equipment quality is the highest priority in our manufacturing process Mesa commits to providing creative innovative thinking and the engineering and scientific expertise needed to produce gas flow related products and solutions that are universally recognized for their superior performance quality and value Bios DryCal technology is the recognized leader in gas flow measurement providing the industry s most reliable products service and solutions for professionals in environmental protection workplace safety industrial process control and laboratory calibration We strive to provide the closest NIST traceable legal defensibility of any flow calibration equipment manufacturer and we actively maintain our NVLAP NIST ISO 17025 laboratory accreditation in order to support our claims and continually improve our quality system and laboratory profi ciency Thank you for purchasing our products From all of us at Mesa best wishes for many years of accurate defensible primary flow measurements Mesa Laboratories Inc 10 Park Place Butler NJ 07405 USA 973 492 8400 FAX 973 492 8270 www mesalabs com Symbol MLAB on the NASDAQ Table of Contents INTO Uo o p prpererrrecere rrr rer aaa A Po RP RE PER PRP 2 About Your MEBO airain aiana aaa tensa dive eddie dd pancada O 2 OPO Nea ON ermsni ca sd apa E
4. a ai ae daa an ode gnc nda Sasi ain kata Danas ATO dos Aaa aaa s Wuhan de CRS asa dra sa Shugabatens Uta Da riste nossa 2 Unpackings Checklist iia fet saladas o Saga ll sa dad idades ata E E ia A E eae 3 Warnings caner aa D cotar rro E a 3 Operating Your ML 800 iii A a 4 Getting Started PAPA gq O 4 Turning the ML 800 ON Se Off sic a dee 4 LEO Backlight iS 4 Low Battery Indicator iii ia Ai 4 Using the MESO KEV pad iranin aaa aae a EE aa aea aed AE 5 General Menu NAVIGATION ne 5 Keypad FUNCION 2 ismmaa amas siasss tica a a a ca A nad Dada nb ata Saad 5 ML 800 Menu TEE iurgiis anaa saasa aa 6 EMO Message acc ccc e ein ce a a a pba wae E E dh Soci T AE EE e 7 Installing amp Removing Flow Cells voor a a a DE Sa ia 8 Factory Default Settings ect a aa aAa aa aa aaa a ao as SiS Sua O 8 Connecting the ML 800 to a Gas FIOW SOURCE encinar sara sapata dor aa DA aaa Ad cc RA 8 Taking REINOS sss cares os iid ates aye aata aa a ado fa Eaa eaaa EA ae E ded E AAE aA AN A 9 Setting User Preferences arisini anian anaa aaa a aaa aa E a o ec 9 Using Sensor FACTO Sauer a aaea da aaae e aan 12 Leak Testing ara ira vedas a a a aA a ago Aa di aa aaa aaa aaa ns 12 Annual Maintenance and Calibra toissa ds eieaa aaen Eai tan 14 REC a A a a Eos diea 14 Sending Your ML 800 tO BiIOS viii a e ia ai 15 SMIPPING srinata anar a dette oaa aE a we aiuyaiiesseatabava uh xs EE vines ceux aa et duscus AU deh E GENES ENTO cbdiei Eaa 15 SUONA ic ii E sis sina Cansada sada di
5. a dinda E E ads gude A in s did ia ds 15 Met Lab Series ML 800 Specifications eee ee eee ee eee eee renee en RR RR ee ee eee nee eens sana 16 Limited Wa Wicca a lib cad aii na ha 17 Accuracy Reliability Convenience Introduction Congratulations You ve chosen the Met Lab Series ML 800 featuring Proven Bios DryCal Technology The ML 800 has five interchangeable cells that offer 0 25 to 0 15 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 800 If at any time you have questions regarding its operation please contact Mesa through our web site www mesalabs com or call us at 973 492 8400 to speak with one of our knowledgeable customer support representa tives About Your ML 800 The ML 800 is a positive displacement primary piston prover for gas flow measurements in either pressure or vacuum applications Using Proven Bios 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 800 can be set to take flow readings manually one reading at a time or automatically in the continuous auto read mode The ML 800 can be program
6. ction 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 O ML 800 Menu Tree med Forward navigation p Backward navigation 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 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 amp Removing Flow Cells The ML 800 accepts interchangeable ML 800 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 800 senses which cell is install
7. ctor 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 800 flow cell 6 Invert the ML 800 flow cell 7 Push any key to commence the leak test At this point the ML 800 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 N a Swagelok Fitting Leak Test Cable Annual Maintenance and Calibration Your ML 800 is engineered to provide years of reliable service with appropriate care and maintenance Mesa recommends an annual calibration by our ISO 17025 accredited laboratory to help ensure the best possible flow measurements and to provide an audit trail for those applications subject to regulatory requirements If you should encounter any problems with your ML 800 immediately contact Customer Service and provide a detailed description of your situation including ML 800 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
8. ctrical voltages or currents defacement misuse abuse neglect accident fire flood terrorism act of God or use in violation of the instructions furnished by Mesa Labs 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 Mesa Labs own service facility or a Mesa 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 Mesa be liable for any special incidental or consequential damages for breach of this or any other warranty express or implied whatsoever MesaLabs Mesa Labs 10 Park Place Butler NJ USA 07405 Phone 973 492 8400 Toll Free 800 663 4977 Fax 973 492 8270 Email biosdrycal mesalabs com web www mesalabs com 2013 Mesa Labs MK01 33 Rev I O
9. ed 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 800 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 Temperature oC 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 800 to a Gas Flow Source The accuracy of the ML 800 is dependent upon its source being stable An unstable flow source may produce inconsistent readings Flow direction is indicated on the 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 ML 800 is designed to be used at ambient pressures only This is easily accomplished by leaving the outlet of the flow cell open to atmosphere for pressure applications or the inlet 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 800 calibrator does not exceed 5 inches of water column WC above ambient pressure Taking Readings The ML 800 default is pres
10. ended 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 800 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 other assure that the inlet and outlet Fittings are tight then repeat the leak test procedure If the problem persists please contact Mesa The maximum leakage limits are 200 ccm for the ML 800 10 1 000 ccm for the ML 800 24 and 3 000 ccm for the ML 800 44 If the leakage exceeds the maximum limits repeat the leak test procedure If the problem persists please contact Mesa for assistance Due to the low leakage of the ML 800 3 the self leak test is not recommended To Initiate the Leak Test 1 Place the ML 800 on a flat vibration free surface 2 While in the Main Menu install the leak test cable included with the ML 800 base unit between the 9 pin ML 800 Base Connector and the 9 pin Cell Conne
11. et 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 Reset button to clear the display of current data Setting User Preferences The ML 800 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 800 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 Fac
12. except in certain instances please contact us for information before initiating a shipment Mesa is not responsible for damage that occurs during shipment Storage If you need to store your ML 800 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 800 cannot be attached to its AC power adapter charger while in storage Fully charge it before extended storage If the battery isn t fully charged prior to storage it might be permanently damaged Fully charge it at least once every three months When removing your ML 800 from storage recharge the battery for at least 12 hours prior to use Met Lab Series ML 800 Specifications Interchangeable Flow Cell Models Part Number ML 800 3 ML 800 10 ML 800 24 ML 800 44 ML 800 75 Model 50 Mililiters Per Min Cell 500 Mililiers Per Min 5 Liter Per Min Cell 50 Liter Per Min Cell 100 Liter Per Min Cell Cell Flow Range 0 5 50 sccm 5 500 sccm 50 5 000 sccm 500 50 000 sccm 1 100 sim Accuracy 0 25 0 5 50 sccm 0 15 0 15 0 15 0 15 Standardized 0 002 sccm Time Per Reading 1 60 seconds 3 135 seconds 3 90 seconds 1 35 seconds 1 50 seconds Weight 80 0z 2300 grams 85 1 oz 2412 5 g 86 oz 2439 3 g 88 4 oz 2507 g 160 oz 4535 g Specifications based on averaged readings Accuracy is stated as a percent of reading including standardizat
13. he 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 de fault 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 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 C 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 Mesa for information on this test Option 1 PTV Piston Tare Value This is the unique piston tare value of a partic
14. ion if applicable Basics Dimensions Cell Model 3 H x W x D 9 x 4 x 6 5 in 258 x 102 x 165 mm Dimensions Cell Models 10 24 44 H x W x D 10 15 x 4 x 6 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 five 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 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 Mesa 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 Mesa or visit our web site at www mesalabs com for the most current product information DryCal Pro Software Visit Mesa s website to download your copy of DryCal Pro software http www mesalabs com drycal pro DryCal Pro ca
15. med for up to 100 readings in an averaging sequence Operation The versatile ML 800 can be used to measure the gas flow rates at atmospheric pressure 7mmHg Its Proven Bios DryCal Technology features a near frictionless piston and flow cell design that provides highly accurate liquid free flow measurements of unequaled speed and convenience For more information about our patented Bios DryCal Technology please visit our website at www mesalabs com The ML 800 consists of two primary components The base and the flow cell there are five 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 800 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 800 includes an RS 232 port serial port and cable You can also utilize Mesa s DryCal Pro software package available for download from www mesalabs com DryCal P
16. nd 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 800 Recertification the time spent within our service facility during this pro cess 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 mesalabs com and visit the Service amp Support page Sending Your ML 800 to Mesa Please contact Mesa for an RMA return merchandise authorization number before sending your ML 800 to our factory for elective Recertification or other service You can get an RMA number through our automated web based system at at www mesalabs com by emailing biosdrycal mesalabs com or by calling us directly at 973 492 8400 Sending your ML 800 to Mesa 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 800 model serial number and revision level Also describe any product issues you may be experiencing Please keep in mind that Mesa will not begin evaluation and service of your ML 800 until you have accepted and approved in writing o
17. ptures flow data from your ML 800 directly to a pre configured table The data can be exported to selectable Microsoft office environment To run DryCal Pro you must have Windows XP or 7 Microsoft Excel 2003 and up and a RS232 port or if your PC does not have an RS 232 port you will need a USB to RS 232 adapter ML 800 3 Cell requires release 2 08 firmware or higher installed in base ML 800 75 cell requires release 2 10 or higher Limited Warranty The Bios DryCal Met Lab Series ML 800 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 ML 800 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 Mesa Labs 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 Mesa Labs transportation charges prepaid Notwithstanding the foregoing Mesa Labs shall have no liability to repair or replace any Mesa Labs product 1 That has been damaged following sale including but not limited to damage resulting from improper ele
18. ro software captures flow data from your Bios DryCal instrument for easy export into common software packages e Capture flow data from your Bios DryCal directly to a PC and export the data to a Microsoft environment e Real time data monitoring e Enter flow rates from pumps or other flow source and calibrate the flow source e Enter flow data from a flow meter and compare the flow measurements from your Bios DryCal precision calibrator e Upload the latest version of the firmware to your Bios DryCal See page 16 for the download url and for system requirements Gas Inlet Gas Outlet Cell Connector Guide Pins Base Connector Back and Side Front and Side Unpacking Checklist Your ML 800 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 Mesa immediately Your ML 800 Base with the following Your ML 800 Flow Cell Includes e ML 800 Electronic Base e ML 800 Flow Cell e Battery Charger e Leak Test Plug e Leak Test Cable e Certificate of Calibration e RS 232 Cable e Inlet Filter ML 800 3 only e Instruction Manual e Certificate of Calibration Warnings A The ML 800 is not rated intrinsically safe and is not for use with explosive gasses or for use in explosive environments A The ML 800 is no
19. t button followed by the number 0 from the Main Menu LCD Backlight The ML 800 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 default 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 800 Keypad Power button A 65 minutes auto shut off E Backlight O ur 1 2 3 i j BACK ara wo Menu navigation Use for data entry com ES ES ou cox R Reset Stop o 0 Product functions Using the ML 800 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
20. t designed 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 mesalabs com for the most current product specifications A For use with clean laboratory air or other inert non corrosive gasses only Operating Your ML 800 Getting Started Although the ML 800 s battery comes charged from the factory we recommend fully charging your new battery by connecting the AC power adapter charger to the ML 800 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 800 indefinitely by leaving it connected to the power sup ply Otherwise make sure to fully charge your ML 800 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 800 On amp Off Press On to start the ML 800 An opening screen will appear indicating the instrument s firmware revision level followed by the Main Menu The ML 800 has a battery saving automatic shut off system After 65 minutes of inactivity the ML 800 will shut off Alternatively the unit can be shut off manually by pressing the Rese
21. tor 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 MEM 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 Option 3 Low Bat Shutoff When On the unit turns off when running on internal battery and the battery voltage is low Setup Menu 2 Reading Type in Average amp 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 For C Option 3 Temp Corr This option is used to set the standardization temperature for indicating standardized flow rate Setup Menu 4 Date Time amp Battery Voltage
22. ular 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 reading of the ML 800 can be scaled by the Sensor Factor to allow for this To enable your ML 800 to scale its actual flow measurements to match the adjusted flow from the MFC or MFM input the sensor factor into the ML 800 before calibrating the MFC or MFM see SETUP Readings The Sensor Factor is displayed on the run screen of the ML 800 as SF X XXX The default setting is 1 000 Because a sensor factor other than your ML 800 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 800 annual factory calibration is recomm
23. ur formal RMA quote for service This protects both you and Mesa during this process and ensures a fair and efficient service experience If sending your ML 800 for repair or evaluation rather than elective Recertification please contact Mesa 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 800 issue and application details and we re unable to resolve the situation by telephone or email we ll issue you an RMA number for the prompt return of your ML 800 for evaluation Please note that Mesa will make every attempt to verify your issue as we want you to get the most out of your ML 800 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 800 please ensure that the packaging is adequate to protect the instrument Whenever possible your ML 800 should be shipped in its original packaging or within a hard case such as a Pelican carrying case available for purchase from Mesa We highly recommend using a standard freight carrier e g FedEx UPS that supplies tracking numbers and insuring the product against damage in transit Mesa is generally not responsible for freight cost associated with shipments to and from Mesa
24. 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 only When pressed each alphanumeric button will display its corresponding number To go back use the back arrow The ML 800 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 current 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 800 Menu Tree Forward navigation Backward navigation Press Fwd arrow after Menu 6 to J return to Main Menu 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 fun
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