DH Instruments GFS2102 Operation And Maintenance Manual Download Page 197 | Manualshive

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DH Instruments GFS2102 Operation And Maintenance Manual Download Page 197

7. MAINTENANCE OF TRACEABILITY AND RECALIBRATION

Page 181

© 2007 DH Instruments, a Fluke Company

was recorded in above. From here, press

OK

and wait while the coefficients are

uploaded to the LCM. When the upload is complete, cycle the power on the LCM to
activate the new Rzero.

7.5.9

STANDARD RESISTOR MEASUREMENT AND

ADJUSTMENT

PURPOSE

To verify the LCM internal 100 Ohm and 110 Ohm Standard Resistors.

PRINCIPAL

LCM has an on-board ohmic measurement system for reading the resistance across the two
PRTs connected to it, one inside and one external to the LCM. Recommended
calibration/verification of the temperature measurement made with these PRT’s is a three-
part process.

The first part is to test the PRT itself to determine the Rzero and slope of the PRT. This can
be done by conventional PRT calibration means. To use the new calibration values, follow
Section 7.5.4.3 for the internal PRT, and Section 7.5.6 for the External PRT.

The second part is to verify the ohmic measurement system of the LCM, which normally
reads the PRT resistances to calculate temperature. The ohmic system verification is
described in Section 7.5.8.

The third part, if necessary, is to measure and adjust the Standard Resistors as shown
below.

EQUIPMENT

REQUIRED

Reference multimeter capable of four-wire resistance measurements.

LCM Standard Resistor calibration cable included in the GFS2101 accessories.

OPERATION

Remove the top cover of the LCM

Connect the LCM Standard Resistor calibration cable to the LCM main board socket J19.
The calibration cable and main board socket are indexed, make sure that they are
aligned and connected correctly.

Connect the four wires of the Standard Resistor calibration cable to a reference

multimeter as outlined in Figure 117, pins 1 thru 4 for the 100 Ohm resistor and pins 5
thru 8 for the 110 Ohm resistor.

Record the measured resistance for each second resistor.

Use GFS Tools

[Tools]

,

[Remote Communications]

to set up communications with the

LCM and send the command “

!STDRES

” and the current values for the 100 and 110

Ohm standard resistors will be returned. The two additional comma delimited values
returned beyond the resistances should remain unchanged during all of these steps.

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Summary of Contents for GFS2102

Page 1: ...2007 DH Instruments a Fluke Company GFS2102 Gravimetric Flow Standard Operation and Maintenance Manual...

Page 2: ...or any direct or indirect damages resulting from the use of the information in this manual or products described in it Mention of any product or brand does not constitute an endorsement by DH Instrume...

Page 3: ...3 2 SYSTEM OVERVIEW 5 2 1 BALANCE AND AMH GFS2102 6 2 2 REFERENCE GAS CYLINDER ASSEMBLY 8 2 2 1 REFERENCE GAS CYLINDER 8 2 2 2 CYLINDER SUPPORT 9 2 2 3 REFERENCE GAS CYLINDER CONNECTOR 10 2 2 4 REGUL...

Page 4: ...1 GENERAL OPERATING PRINCIPLES 43 4 1 1 GFS2102 MEASUREMENT PRINCIPLE 43 4 1 2 GAS DEPENDENT MASS RANGES AND CYLINDER SIZE SELECTION 44 4 1 3 AUTOZERO 46 4 1 4 GFS2102 DATA COLLECTION METHODS AND CONV...

Page 5: ...5 13 DATA PLOT RUN SCREEN 79 5 2 TOOLS MENU 80 5 2 1 OVERVIEW 80 5 2 2 OPTIONS 80 5 2 2 1 RUN TEST TAB 80 5 2 2 2 INITIALIZE TEST TAB 83 5 2 2 3 END TEST TAB 84 5 2 2 4 DATA FILE TAB 85 5 2 2 5 DATA...

Page 6: ...ALCULATIONS 149 5 7 1 OVERVIEW 149 5 7 2 ERRORS 149 5 7 3 TOLERANCE 150 5 7 4 AUTOZERO CORRECTION 150 5 7 5 REFERENCE CYLINDER BUOYANCY 151 5 7 6 FULLY COMPENSATED MASS 153 5 7 7 AVERAGE FLOW 154 5 7...

Page 7: ...PLE 171 7 5 4 2 ENCLOSURE PRESSURE SENSOR 172 7 5 4 3 AMBIENT TEMPERATURE SENSOR 173 7 5 4 4 RELATIVE HUMIDITY SENSOR 174 7 5 5 TH PROBE ADJUSTMENT 175 7 5 5 1 TH PROBE TEMPERATURE SENSOR 175 7 5 5 2...

Page 8: ...GFS2102 OPERATION AND MAINTENANCE MANUAL 2007 DH Instruments a Fluke Company Page VI N NO OT TE ES S...

Page 9: ...Conditions Run Screen Fields 71 Table 21 DUT Reference Comparison Run Screen Fields 73 Table 22 Spy Window Information 75 Table 23 molbox Output Run Screen Fields 76 Table 24 Tare molbox Fields 78 Ta...

Page 10: ...Tab Fields 132 Table 55 GFS Configuration Editor GFS AMH Tab Fields 133 Table 56 GFS Configuration Editor Limits Tab Fields 134 Table 57 GFS Configuration Editor LCM Tab Fields 135 Table 58 GFS Confi...

Page 11: ...t mounting holes 34 Figure 20 GFS balance rear panel connections 34 Figure 21 GFS balance inside AMH with mass tray installed 35 Figure 22 Checking height and level of gas conveyance loop connections...

Page 12: ...Tab 107 Figure 68 Test Definition Editor Data Tab 109 Figure 69 Test Definition Editor AutoZero Tab 110 Figure 70 Test Definition Editor Options Tab 111 Figure 71 Test Definition Editor Comment Tab 1...

Page 13: ...window 146 Figure 104 Run Manual Test Setup Manual Test window 147 Figure 105 Accumulation Sample Setup window 148 Figure 106 US DOT and European Reference Gas Cylinder labels 163 Figure 107 Reference...

Page 14: ...GFS2102 OPERATION AND MAINTENANCE MANUAL 2007 DH Instruments a Fluke Company Page XII N NO OT TE ES S...

Page 15: ...Contents structure Set up of a GFS2102 system should not be attempted without using Section 3 All first time GFS2102 users should read Section 4 There is a glossary of common terms in Section 9 1 a t...

Page 16: ...GFS2102 OPERATION AND MAINTENANCE MANUAL 2007 DH Instruments a Fluke Company Page XIV N NO OT TE ES S...

Page 17: ...S2102 system are operated by a system controller personal computer running GFS Tools software The system is made up of several individual components working together and controlled by GFS Tools 1 1 SP...

Page 18: ...Temperature Range Uncertainty C 15 to 30 0 1 1 1 3 2 TH PROBE REFERENCE GAS CYLINDER SURROUNDINGS AMBIENT CONDITION MEASUREMENT Temperature Range Uncertainty C 15 to 30 0 2 Relative Humidity Range Un...

Page 19: ...0 1 mVDC Current Range 4 to 20 mA Current Accuracy 0 025 FS Current Resolution 0 4 A ANALOG INPUT Voltage Range 0 to 6 000 VDC Min Max Measurable Voltage 0 25 6 00 VDC Voltage Accuracy 0 015 FS Volta...

Page 20: ...GFS2102 OPERATION AND MAINTENANCE MANUAL 2007 DH Instruments a Fluke Company Page 4 N NO OT TE ES S...

Page 21: ...ntrolled by GFS Tools which is the user interface for the GFS2102 instrument Figure 1 GFS2102 system 1 Precision mass balance 8 Catenary gas conveyance loop 2 Reference mass 9 Laboratory conditions mo...

Page 22: ...s using a high precision 2 3 kg range mass balance It is a mass comparator type balance so there is no significant deflection of the mass tray while the mass load is placed on it The balance has a dig...

Page 23: ...onveyance loop takes place The standard balance mass tray has been replaced with a custom mass tray that uses a three point locating system to assure consistent physical placement of the reference gas...

Page 24: ...ss of test gas available in the cylinder The characteristics of each cylinder are included on a technical data report that accompanies a new cylinder assembly and must be entered in GFS Tools software...

Page 25: ...rs should be replaced Hydrostatic testing should also be performed on the cylinders every 5 years to ensure safe operation Do not expose the reference gas cylinder to temperatures above 56 C 133 F If...

Page 26: ...ded into its resting position Figure 7 Reference gas cylinder support The cylinder support is made of stainless steel legs threaded into a machined aluminum body Six threaded spring loaded pins locate...

Page 27: ...well regulated gas flow through the gas conveyance loop and out of the GFS draft enclosure The regulator assembly is made up of two fixed pressure regulators on a welded assembly that is designed to...

Page 28: ...ENCLOSURE AND VIBRATION ISOLATION TABLE The GFS balance AMH and reference gas cylinder assembly are operated inside an insulated enclosure to isolate them from air drafts and rapid changes in tempera...

Page 29: ...to the reference gas cylinder assembly to get accurate measurements of the cylinder s surface and surrounding conditions A loop alignment tool is delivered with the GFS draft enclosure to help in posi...

Page 30: ...shipping purposes the exchanger is shipped without liquid and needs to be prepared prior to use Preparation of the heat exchanger is described in Section 3 3 14 2 8 GFS FS REFERENCE GAS CYLINDER FILL...

Page 31: ...to be used then at a minimum a filter regulator and manual shutoff valve are recommended and consideration will have to be given to the varying height locations of these connections as well as those o...

Page 32: ...GFS2102 OPERATION AND MAINTENANCE MANUAL 2007 DH Instruments a Fluke Company Page 16 N NO OT TE ES S...

Page 33: ...Granite Table Stand See below 3 1 1 N A GFS draft enclosure corrugated container in wood crate 3 1 2 Table 2 Draft enclosure glass doors corrugated container 3 1 2 Table 2 Draft enclosure accessories...

Page 34: ...nclosure from the pallet The draft enclosure is packed alone in the wooden crate Two glass doors are packaged separately from the draft enclosure in a corrugated container Carefully open the container...

Page 35: ...daptor black NPN 3 1 4 MFC CB The MFC CB is delivered in a corrugated container with foam inserts The MFC CB accessories are sealed in plastic and included in the same corrugated container Open the co...

Page 36: ...ve shock to the balance while handling Table 6 details all items included with the GFS balance Table 6 GFS mass balance parts list DESCRIPTION PART 1 ea Mass balance NPN Accessory kit including 1 ea C...

Page 37: ...cylinder can be filled and prepared for use once the first is depleted Each reference cylinder assembly is shipped in a black molded plastic case in a corrugated liner During shipment the plastic case...

Page 38: ...insert 1 5 Liter NPN Cylinder Option 3 European 1 1 Liter Reference gas cylinder assembly including 1 ea Reference gas cylinder European 1 1 Liter 402286 1 ea Reference gas cylinder connector NPN 1 e...

Page 39: ...plastic shipping and storage case NPN 3 1 11 MOLSTICS The low flow molstic PN 401316 and mid flow molstic PN 401244 are not included in the GFS2102 base system but may be purchased with the system Eac...

Page 40: ...electrical power to the Control Cabinet See Section 1 1 1 for GFS system electrical power requirements Be sure to consider DUT electrical requirements also If low flow 100sccm tests will be performed...

Page 41: ...uld be located in close proximity to both a high pressure gas supply and a workbench or surface where the reference gas cylinder can be safely placed during filling The high pressure flex tubes delive...

Page 42: ...as cylinder must be transported between the two locations often while pressurized A molded plastic case is provided for each reference gas cylinder assembly to make transport of the cylinder safer and...

Page 43: ...utility pass through opening so that the probes remain on the inside of the enclosure Attach the white cable from the IR probe to the blue box mounted inside the sidewall column Run the gray cable fr...

Page 44: ...he LCM Connect the PRT probe orange cable to the T4 port on the rear panel of the LCM Connect the IR box grey cable to the IR port on the rear panel of the LCM Slide the clear plastic enclosure pressu...

Page 45: ...OM1 port COM 2 port of LCM to COM port of GFS balance Any COM port of USB serial adaptor to MFC CB COM 1 port Use any remaining COM ports of the USB serial adaptor to connect to DUT serial connection...

Page 46: ...bly 1 Reference gas cylinder 2 Regulator assembly 3 Reference gas cylinder connector 4 Cylinder support Never ship the reference gas cylinder assembly in the fill carry case while the regulator assemb...

Page 47: ...m Place the regulator assembly on the reference gas cylinder assembly with the regulator stem in the cylinder connector s regulator stem port The position of the regulator assembly should be such that...

Page 48: ...sheet provided for each cylinder 3 3 9 INSTALLATION OF REFERENCE MASS ON MASS PLATE Locate the reference mass and the AMH reference mass plate the AMH plate with NO bubble level on the top surface Th...

Page 49: ...ever lost or misplaced never simply replace the screw the reference mass will have to be recalibrated including the original legs and screws and the replacement screw When installing or uninstalling t...

Page 50: ...be gently pushed aside to access the holes in the AMH base If you are unable to thread in the screws with the balance in place it is possible to first connect the bracket to the AMH base only then in...

Page 51: ...the balance legs are not hung up on the balance positioning bracket and the balance sits freely on the granite surface Ideally the bracket will make little or no contact with the balance legs Using a...

Page 52: ...is placed on the balance mass tray the legs of the cylinder support must pass through the AMH plates without contacting the plates so that the cylinder mass can be measured with the required sensitiv...

Page 53: ...2 base postion in order to ensure clearance of the reference gas cylinder legs and engage the cylinder support feet as described above Figure 23 Reference Gas Cylinder resting on balance AMH top plate...

Page 54: ...ference mass on the balance and zero state neither cylinder or reference mass on the balance In any of these states the balance output should be stable within 1mg 0 001g and read a mass value close to...

Page 55: ...lose to the side of the cylinder at mid cylinder height IR Probe should be about 4 inches away from cylinder surface pointed at the cylinder surface at mid cylinder height 3 3 14 PREPARE THE HEAT EXCH...

Page 56: ...r system is used to secure the lid in place and typically the lid will only go on in one orientation that will allow alignment of all three holes in the lid with those in the can Orient the lid and pl...

Page 57: ...r equivalent regulator is recommended If the DUT is larger than a 1E3 L then an appropriate standard non venting regulator is recommended For an upstream molbloc the recommended flow path is GFS heat...

Page 58: ...GFS2102 OPERATION AND MAINTENANCE MANUAL 2007 DH Instruments a Fluke Company Page 42 N NO OT TE ES S...

Page 59: ...during one measurement is usually a small fraction of the total mass of the entire assembly on the balance and thus the mass range of the balance The high resolution of the balance is critical to allo...

Page 60: ...gh pressure test conditions i e 10 slm 525 kPa This cylinder can also easily be overfilled with other gases if taken over the typical maximum fill pressures listed in Table 11 for the 1 5 liter cylind...

Page 61: ...xide N2O 725 5 0 725 5 169 670 4 65 199 Carbon Tetrafluoride CF4 1595 11 0 1560 10 8 650 460 3 2 198 Methane CH4 2400 16 6 2320 16 145 2320 16 197 Trifluoromethane CHF3 600 4 1 580 4 245 450 3 1 197 S...

Page 62: ...arted until either the user or pre set test limits end the measurement Raw mass readings are taken from the balance and are corrected for drift by way of the AutoZero function and for air buoyancy Sin...

Page 63: ...FS Tools also uses a rolling average flow setup with a user definable number of consecutive samples to be averaged If the user would like to use a real time calculated flow instead the rolling averagi...

Page 64: ...user get the results desired maintain practical test times and estimate how much mass must be used for each point The predicted uncertainty at which the user would like to end the accumulation is call...

Page 65: ...ctions 5 5 2 7 5 2 2 1 but the zero and span function is reserved for occasional use and cannot be set to run automatically 4 3 REFERENCE GAS CYLINDER FILLING Pressurized gases are potentially hazardo...

Page 66: ...d from the flow system Evacuation When switching gases an effective way to produce a pure gas fill with the new gas is to first evacuate the cylinder using vacuum If a vacuum pump is used for cylinder...

Page 67: ...ort but do not tighten at this time to allow for purging the supply lines in Section 4 3 4 Connect the DH500 fitting of the flex tube to the Reference Cylinder port on GFS FS An exhaust connection is...

Page 68: ...ned the indicated pressure on the Reference Cylinder gauge will rapidly drop to the actual pressure in the cylinder and then will slowly approach the Adjusted Output pressure over the course of severa...

Page 69: ...ideration occurs for gases that have a higher tendency to cool such as CO2 or N2O For these gases the first stage of the dual regulators attached to the cylinder assembly will cool far faster than the...

Page 70: ...close to that of the GFS measurement can be obtained The time measurement related errors that affect the GFS average flow measurement are handled within the GFS system to produce very good results wh...

Page 71: ...rge starting tolerance 5 that results in a short starting time a flow value and a mass to deplete greater than 1 gram are all entered The flow and mass values actually entered are irrelevant as the sy...

Page 72: ...depleting mass but the setup will not continue with zero or null values The OK button is selected to continue The test is allowed to continue for the minimum time established to get an accurate resul...

Page 73: ...nning to provide real time data acquisition information 5 1 2 MAIN MENU BAR The main menu bar is divided into six separate selections Each menu item is summarized below and covered in detail in variou...

Page 74: ...customize GFS Tools behavior see 5 2 2 Unit of Measure Converter Run the Unit of Measure Converter This tool not only acts as a convenient unit converter it also provides the ability to create custom...

Page 75: ...jor test step setting target flow AutoZero etc The blue panel indicates the minor test step stability test dwell taking point etc Figure 31 Status Bar Clicking either of the inset panels of the status...

Page 76: ...one point for each click This feature is used to repeat points when needed in Run Test mode Not functional with Manual tests as they do not have a defined point sequence to skip through Step Back doe...

Page 77: ...s to get a list of options that apply to the output Display unit of measure and resolution can be changed for most outputs DUT Reference Comparison Display the DUT Reference Comparison Run Screen This...

Page 78: ...ata Acquisition Options ICON DESCRIPTION Create Data File Press this button to create a new Data File A standard windows filebox allows the selection of the Data File name and location The choices in...

Page 79: ...s When the time specified as the Timed Point Interval s has been reached another averaging cycle begins This process is repeated until the Abort Data Acquisition button is pressed or the run mode is c...

Page 80: ...the numeric displays 5 1 5 2 GFS RUN SCREEN The GFS Tools GFS Run Screen is the equivalent of an instrument front panel The GFS Run Screen is the main interface and front panel of the GFS system Throu...

Page 81: ...d to correct for any drift in the balance C The cylinder temperature probe TH Probe 3 has a rate of change of temperature that exceeds the configured limit This can happen under high flow conditions A...

Page 82: ...for the air buoyancy correction on the reference gas cylinder Enclosure Humidity The humidity as indicated by the LCM TH Probe 3 humidity sensor The enclosure humidity value is used to determine the...

Page 83: ...molbloc attached to the molbox1 Mass Error The reading error between the accumulated masses of the GFS and the DUT s Flow Error The reading error between the averaged flows of the GFS and the DUT s Ta...

Page 84: ...mportant to cycle the AMH after system setup or when the reference gas cylinder is changed The cycle operation helps to re align miss aligned mechanical components Abort the active GFS AMH cycle This...

Page 85: ...ce between the corrected mass g and starting corrected mass over the elapsed time s Dividing these two numbers results in the current mass flow in mg s Flow Flow determined by the depleted mass divide...

Page 86: ...running Manual or Diagnostic Tests only Use the GFS AMH manipulation options on the GFS run screen to ensure that the AMH is in a state such that the balance operation is valid It is the users respons...

Page 87: ...splay by selecting the drop down menu option next to the GFS display toolbar button The ambient conditions information is grouped by sensor and function on the display Use this feature to verify and t...

Page 88: ...ates a warning in the GFS status indicator when the temperature output approaches the current dew point temperature External PRT T4 The temperature output of the external LCM PRT This PRT is used to m...

Page 89: ...n There is no error or best fit flow when an accumulation is not active When an accumulation is active the GFS best fit flow displays along with the average flow of each DUT The Rdg Error row indicate...

Page 90: ...ch device output that requires remote commands Spy Windows are accessed by right clicking a Final Output on a Device Output Run Screen and selecting the Spy Window menu choice This feature is provided...

Page 91: ...lly used by GFS Tools do not have a value in this field When troubleshooting make sure the value displayed includes the correct device output information 5 1 5 9 MOLBOX OUTPUT RUN SCREEN If a molbox1...

Page 92: ...eam and downstream PRT s Set Active molbox flow set point This value is used only when the molbox is equipped with the MFC control option and is used as the analog supply to a flow controller For manu...

Page 93: ...lbox pressure transducer taring This function executes the molbox tare function When pressed a message displays allowing the selection of the tare pressure upstream or downstream After this selection...

Page 94: ...ous Microrange Tare Pa Value of the old microrange tare If the microrange is not supported by the molbox N A is displayed Downstream Pressure Instantaneous downstream pressure This value is corrected...

Page 95: ...s ON and the grid is scrolled to the top to view points taken earlier in the test completion of a new point forces the grid back to the last point The data types logged and how they are ordered in the...

Page 96: ...ng a test as well as when the system is idle 5 2 2 OPTIONS 5 2 2 1 RUN TEST TAB The Tools Options Run Test tab is used to set user preferences affecting the run test part of test execution Various asp...

Page 97: ...an accumulation begins AutoZero at start of accumulation The GFS AutoZero function is run before the accumulation begins Zero balance at start of accumulation The balance is set to zero before the acc...

Page 98: ...choices selected in the Test Definition govern the test process However there are times in which manual user interaction is more efficient For example a user may manually adjust the target flow or Au...

Page 99: ...initialization This serial number is automatically compared to the serial number specified in the device definition If this option is checked a warning message displays when the serial numbers do not...

Page 100: ...rocess Gas Editor menu choice to update gas information for a specific manufacturer 5 2 2 3 END TEST TAB The Tools Options End Test tab is used to set user preferences affecting operations that occur...

Page 101: ...s but it also prevents the test from completing automatically No repeat option The test concludes automatically after the last point There is no opportunity to repeat points after the last point is co...

Page 102: ...Data Files check box When this option is checked completed test Data Files are write protected Check this option to protect data gathered from completed tests Write protected files are not easily mod...

Page 103: ...a Files based on the DUT on which the test was run This DUT dependent data directory is created as a subdirectory of the Root Data File directory This feature automatically sorts Data Files in DUT dep...

Page 104: ...o view all columns of test data Multiple grid display fields can be selected in two ways a hold down the SHIFT key and use the UP and or DOWN arrow keys to make multiple contiguous selections b hold d...

Page 105: ...e handled by the DHI Unit of Measure Converter Run the Unit of Measure Converter as a stand alone application using the program group icon or use the Tools Unit of Measure Converter option in GFS Tool...

Page 106: ...ese interfaces check the Poll Interface option When active this feature polls the selected RS232 port and automatically log any response After a command has been issued the selection can be toggled wi...

Page 107: ...s error off 5 ms will not yield a significant flow integration error Use the displayed Time Calibration form to perform the comparison Press Start to begin the process The LCM and PC clock comparison...

Page 108: ...for new file selection printing and displaying the test data in a grid format The function of each toolbar option is described in the table below Figure 59 Data File Viewer Table 31 Data File Viewer O...

Page 109: ...creen to appear loaded with a plot generated using the data from the Data File Figure 60 Data Plot Data File Screen 5 3 3 1 PLOT TOOLBAR A plot toolbar is provided to select new Data Files print the c...

Page 110: ...Editor Use the toolbar or menu choice to access this tool The features on this form allow plots to be created edited and removed Editing custom plots follows the same basic editing rules as all other...

Page 111: ...his case use the secondary Y axis on a 2D plot Figure 61 shows the Custom Plot Editor loaded with several plots Table 33 explains the features available on the form Figure 61 Custom Plot Editor Table...

Page 112: ...t to associate with Z Axis Data 5 3 3 4 PLOT POINTS Use the toolbar or Options menu to display the Plot Points dialog The features on this form allow the selection of which points Data Files and point...

Page 113: ...secondary Y axis is included in the plot Limit Y axis to 1 5X tolerance check box This option is active only when tolerance bars are included in the plot and an error plot type is selected If the erro...

Page 114: ...pressing the Generate Report button in the Test Complete form at the end of a test or run directly by selecting the short cut icon in the GFS Tools program group In all cases the Report Editor runs as...

Page 115: ...or Log log There is only one error log file This file is stored in the installation directory of GFS Tools By default this is C Program Files GFS Tools All system errors are logged to this file Use th...

Page 116: ...e name support is disabled the field is limited to 8 characters Customer Number The active DUT customer number is added to the data file field If long file name support is disabled the field is limite...

Page 117: ...device used by GFS Tools Each section is labeled based on the device the section represents DUT DUT information labels DUT data labels Reference Etc Pre Test Leak test settings are listed in this sec...

Page 118: ...up to be identified quickly from a list rather than by scrolling through all individual setups In the Setup Selector all setups are listed alphabetically by Label The selector columns include informat...

Page 119: ...directory based on the data directory naming convention selected using the Tools Options Data File tab Editing Record label The red label flashes when changes to a setup have been made but not saved N...

Page 120: ...e edit view and delete tests The Test Definition Editor uses the same editing concepts as the DUT Editor Only one Test Definition can be edited at a time The test scroll bar and the Test Selector are...

Page 121: ...press the Restore icon to return the test to its original state 5 5 2 3 TEST POINT SEQUENCE The points table displays on the left panel of the point Test Definition Editor Define up to 10 flow points...

Page 122: ...rrections Run Leak Test check box selection Determines whether a leak test will be run at the beginning of a test or not If the option is checked a leak test will be run Otherwise a leak test will not...

Page 123: ...on that is less than or equal to the overall test uncertainty that is expected Stability Setting numeric entry field Defines how stable the target output of the controller must be to yield a ready con...

Page 124: ...adjusts the set point command to the controller to adjust the output to the target value as indicated by the first DUT To DUT2 At each point in the test GFS Tools continuously readjusts the set point...

Page 125: ...ts in a time that accounts for at least 10 of the Ending Sample Rdg Tolerance time as data taken before that may have too little time or too little mass for GFS Tools to calculate an acceptable mass f...

Page 126: ...to limit the number of points per accumulation regardless of the test flow rate Approximately 200 points is recommended per accumulation This helps to limit the overall file size and keeps file proces...

Page 127: ...flow point The first point of the test will carry out the selected pre accumulation operation AutoZero at end of of accumulation check box After the required accumulation mass is consumed a final Aut...

Page 128: ...Flow Option to perform after an accumulation ends The choice determines the frequency to apply the Pause Flow operation Pause after each accumulation After each accumulation of each flow point the tes...

Page 129: ...Begin completing the DUT Definition starting with the Header tab Select a Device Type and a Record Type DUTs can be defined as Individual Profile and Profile w Range These selections allow an explici...

Page 130: ...of the Header fields a comma or tab character These characters will cause problems when importing the Data File or creating the Data File directory based on the data directory naming convention see 5...

Page 131: ...is identical to what is entered in the Process Gas Editor The default Data File directory naming preference can use DUT Manufacturer as part of the Data File directory structure Model required drop do...

Page 132: ...product information The value entered is included in the Test Data Files and can be included in reports DUTs whose record type is Profile do not include a customer ID in the DUT Editor Instead the ide...

Page 133: ...the calibration of the device Ceritifcation ID optional text entry Enter any relevant document tracking information associated with the Calibration Date The information entered is available on calibra...

Page 134: ...a Final Output of Voltage The DUT raw output source must be set to Voltage Measurement When GFS Tools tests this DUT it will identify it as having a voltage output and use the DMM to read the voltage...

Page 135: ...rt to the receive buffer The default selection is None This selection is valid for the majority of remote devices None There is no RS232 handshaking required RTS CTS Request to Send Clear To Send hand...

Page 136: ...n a final character is not used to mark the end of a response GFS Tools limits the RS232 buffer to characters When the buffer is full the response is considered complete and the data in the buffer is...

Page 137: ...ne remote command can be edited at a time Save changes to each command before attempting to edit a new command Figure 76 Remote Command Editor 5 5 3 4 1 Initialization Commands Initialization commands...

Page 138: ...e numerical set point value The actual command and format are device specific so refer to the device s manual for command details Since the target output will change based on test conditions the requi...

Page 139: ...d BYTE 2 27 to send the characters 2 and 27 Hex 02 1B Most devices that require specific byte data in this way do not use command or response terminators Delay After Command numeric entry Enter the le...

Page 140: ...ecified in the Command field is sent to the remote device regardless of the set point Use this choice with controlling devices that have a pre programmed sequence of targets that correspond to Test De...

Page 141: ...span This percentage is applied to the final output span to obtain the final output Many mass flow instruments that have an analog output V mA use this type of linear scaling For example 0 5V raw outp...

Page 142: ...re to any required display or test unit of measure The unit must be selected from the list of available choices If a flow unit is not in the list select the Tool Unit of Measure Converter menu choice...

Page 143: ...Maximum output entries display This selection also determines the default resolution with which this final output is displayed and logged Table 51 Tolerance Type Choices TOLERANCE TYPE DESCRIPTION Rea...

Page 144: ...pan and Reading The tolerance used is the sum of the two Figure 81 Span Reading FS Reading The tolerance is calculated at each point as both FS and Reading Tolerance used is the sum of the two This to...

Page 145: ...d maintained in the same manner as DUT Definitions see 5 5 3 This editor is functionally identical to the DUT Definition Editor accessed using the Setup DUT menu choice The only difference is that the...

Page 146: ...reference gas cylinder identification Record Last Edited The date and time of the last saved change associated with the active reference gas cylinder Mass of evacuated cylinder assembly required numer...

Page 147: ...t required numeric entry MPa Pressure distortion coefficient of the cylinder in m 3 per MPa 5 5 6 CONFIGURATION The Setup Configuration menu choice activates the GFS Configuration dialog This form is...

Page 148: ...h the Balance RS232 poll interval set to 100ms would limit this to a sample every 0 1s If the sample time is less than the Balance RS232 poll interval a sample is taken with every balance update see s...

Page 149: ...after a Balance Zero or AutoZero operation When a flow rate is set no stability criteria can be applied to the reference cylinder state of the AMH as it is constantly changing mass As a result a fixed...

Page 150: ...he ready indicator on the GFS Run Screen see 5 1 5 2 1 GFS Control Panel System operation should be suspended until the rate of change limit is met Maximum cylinder probe temperature offset C required...

Page 151: ...e value is used to determine the starting and ending GFS tolerance values see section 5 7 10 Reading GFS Tolerance Tolerance values are not intended to represent the final GFS uncertainty The calculat...

Page 152: ...58 GFS Configuration Editor Balance Tab FEATURE DESCRIPTION Manufacturer At this time the only supported balance manufacturer is Mettler Model Optional alphanumeric entry The balance model number i e...

Page 153: ...clicking this field brings up the interface settings window Figure 88 5 5 6 6 INTERFACE Figure 90 GFS Configuration Interface Tab Table 59 GFS Configuration Editor Interface Tab Fields FEATURE DESCRIP...

Page 154: ...internal balance calibration is run this number must be reset back to 1 or the Balance Zero and Span function must be rerun or errors in the mass reading will occur degrading the overall accuracy of...

Page 155: ...Humidity board for information purposes only not user adjustable PRT Temperature Calibration Required numeric entry fields Resistance at 0 C ohms The Ambient Temperature PRT resistance in Ohms at zer...

Page 156: ...robe temperature calibration slope correction multiplier no unit The Default value is 1 Calibration Date Automatically updates to the date a new adder or multiplier are entered in the above fields and...

Page 157: ...5 GFS TOOLS SOFTWARE Page 141 2007 DH Instruments a Fluke Company 5 5 7 4 TH PROBE 3 Figure 94 Calibration TH Probe 3 Tab 5 5 7 5 EXTERNAL PRT Figure 95 Calibration External PRT Tab...

Page 158: ...Temperature calibration 5 5 7 6 IR PROBE Figure 96 Calibration IR Probe Tab Table 64 Calibration Editor IR Probe Tab Fields FEATURE DESCRIPTION Cylinder Surface Probe Required numeric entry field Add...

Page 159: ...nder to be used from the Gas Cylinder drop down selection If new hardware is in use since the previous test i e a different DUT molbloc or a different test is to be run than previous then click the Cl...

Page 160: ...itor button can be used to view details of the test and verify it is the correct one intended to be run Figure 98 Run Test Select Test Definition Window Select the DUT s to be run see Figure 99 Typica...

Page 161: ...he DUT information and select Next Repeat for additional DUT s Figure 100 Run Test Configure DUT Device window Verify or select the mass flow controller on the Setup Flow Controller window see Figure...

Page 162: ...for the test including the balance LCM and all components selected in the previous steps Once initialization is complete all options and points of the test definition will execute in pre defined order...

Page 163: ...tions select the Reference Gas Cylinder the Test Gas and the Flow Unit to be used during the test If new hardware is in use since the a previous test i e a different DUT molbloc then click the Clear P...

Page 164: ...is acknowledged by the user all further test execution is halted Open a data file see Section 5 4 2 for information on Data File creation A data file must be open to successfully collect data from an...

Page 165: ...ection details the various calculations used by GFS Tools 5 7 2 ERRORS The DUT error expresses the difference between the DUT reading and the reference reading at a particular point in a test Errors a...

Page 166: ...g the tolerance is the sum of the two values If the selection is DUTspan or Reading the tolerance used is the greater of the two values Tolerances that are defined in DUT final output set or output un...

Page 167: ...ecrease should result in a positive mass change The above equation holds true VARIABLE DEFINITION md The calculated mass drift of the balance in grams This is the AutoZero correction value used to det...

Page 168: ...d to determine the gas compressibility at pressure mbtl The instantaneous cylinder mass g mbc The instantaneous cylinder buoyancy mass g mi Instantaneous unmodified mass output of the balance g md The...

Page 169: ...his value is zero However all other calculations are the same d bc i f m m m m When the start option on the Balance Display toolbar is pressed to take a point the current time and fully compensated ma...

Page 170: ...antaneous flow 5 7 8 BEST FIT FLOW The best fit flow is determined by calculating a real time best fit at the defined sample rate Unlike a standard best fit GFS Tools forces the fit though zero It is...

Page 171: ...flow value converted to g s grams per second 5 7 10 READING GFS TOLERANCE The Reading tolerance flow value is derived from independent mass and time tolerance values The Setup Configuration menu choic...

Page 172: ...alue t Time uncertainty at any given mass value For simplicity other sources of uncertainty that are related to mass must be combined to determine this value q Nominal flow target g s This is not the...

Page 173: ...define how the sample rate is calculated When sampling starts and stops is based on the starting and ending rdg tolerances and the target depleted mass entry q m t s r VARIABLE DEFINITION t r The tim...

Page 174: ...GFS2102 OPERATION AND MAINTENANCE MANUAL 2007 DH Instruments a Fluke Company Page 158 N NO OT TE ES S...

Page 175: ...eference Gas Cylinder Have the cylinder hydrostatically tested Depending on location send the cylinder to a DOT or EU approved testing facility for hydrostatic testing Every 5 years from the manufactu...

Page 176: ...ab to spread the grease evenly over the surfaces Reassemble the Reference Mass plate and then the Reference Cylinder plate back on to the AMH Operate the AMH to check for smooth and easy movement of t...

Page 177: ...If the measurements match then the cylinder is properly aligned and ready for use otherwise proceed to Section 6 3 2 to align the cylinder 6 3 2 ALIGNMENT OF THE REFERENCE GAS CYLINDER Alignment shou...

Page 178: ...Using proper precautions for safely bleeding the pressurized gas and venting or disposing of any potentially hazardous toxic or flammable gases drain the gas from inside the reference gas cylinder The...

Page 179: ...ows The cylinder serial number is in the upper right corner of the label Figure 106 US DOT and European Reference Gas Cylinder labels To locate a local hydrostatic testing facility contact a local pai...

Page 180: ...nder while it is pressurized Follow the instructions in Section 6 4 for preparing the cylinder for shipment Figure 107 Reference gas cylinder carrier 1 Spring loaded screw 2 5 5mm Lock Nut 3 Rubber pa...

Page 181: ...anger may evaporate or become stagnant If this occurs the exchanger may lose some of its effectiveness If the Heat Exchanger was weighed previously and the mass recorded weigh the Exchanger again and...

Page 182: ...GFS2102 OPERATION AND MAINTENANCE MANUAL 2007 DH Instruments a Fluke Company Page 166 N NO OT TE ES S...

Page 183: ...isplays on the screen while the test is active Allow the clocks to run for at least one hour then press Stop A predicted span correction is provided Press Apply to use this new span correction to adju...

Page 184: ...ommended Section 7 5 4 AMBIENT P T H SENSOR ADJUSTMENT Verification of the enclosure pressure ambient temperature and ambient humidity sensors One year calibration interval recommended Section 7 5 5 T...

Page 185: ...fined uncertainty Reading the mass balance directly with a computer and accurately establishing the time of each mass reading within a Windows OS environment can be problematic and subject to lag Inst...

Page 186: ...unications to set up communications with the LCM and send the command CNTR TEST 1 to the LCM The LCM will now output a square wave at 500 Hz 0 0175 Hz that the counter should have no trouble locking o...

Page 187: ...but are not used by the GFS system The on board measurement sensors are Enclosure pressure sensor AMB Relative humidity sensor Ambient temperature PRT The ambient conditions sensors are verified and...

Page 188: ...front panel display to a reference and adjust the corresponding Adder and or Multiplier as needed to arrive at acceptable agreement Normally only the Adder is used since a one point calibration is be...

Page 189: ...cycle the power on the LCM and the LCM enclosure sensor reading should reflect the newly applied calibration coefficients See Section 7 5 4 for an explanation of Adders and Multipliers and their use...

Page 190: ...the upload is complete cycle the power on the LCM and the LCM reading should reflect the newly applied calibration coefficients See Section 1 1 for ambient temperature sensor specifications 7 5 4 4 RE...

Page 191: ...ensor may encounter during normal operation To adjust the values of the Adder and or the Multiplier use GFS Tools and select the Setup Calibration TH Probe 2 or TH Probe 3 tab see Figure 113 to access...

Page 192: ...gainst a humidity reference is all that is needed If a full adjustment is desired at least two points should be selected within the range of the sensor and encompass the range of measurements the sens...

Page 193: ...rd Resistors per the steps in Section 7 5 8 and 7 5 9 A one point verification against a temperature reference is all that is needed If a full adjustment is desired at least two points should be selec...

Page 194: ...measurement The IR sensor is NOT a high accuracy device and is only used to measure the cylinder surface temperature to determine when moisture may be condensing on the surface which will have detrime...

Page 195: ...are uploaded to the LCM When the upload is complete cycle the power on the LCM and the LCM enclosure sensor reading should reflect the newly applied calibration coefficients See Section 7 5 4 for an...

Page 196: ...ERATION Adjust the value of Rzero to 100 ohm Use GFS Tools and select the Setup Calibration External PRT tab see Figure 114 to access a screen in which the Rzero value can be edited Record the current...

Page 197: ...CM which normally reads the PRT resistances to calculate temperature The ohmic system verification is described in Section 7 5 8 The third part if necessary is to measure and adjust the Standard Resis...

Page 198: ...esired Once sent a typical response from this command returns 96965 59 NONE 24 54 23 534 22 231 29 56 21 83 28 51 21 89 21 090 NONE 76290443 977 1 2 3 4 5 6 7 8 9 10 11 12 Where 1 Barometric Enclosure...

Page 199: ...unning one of the three test options in GFS Tools the Run Diagnostic Test option is easiest as it bypasses many unnecessary steps not required for the balance The Run Test Definition option is not rec...

Page 200: ...e GFS Run Screen window using the Control Toolbar to removed all mass from the balance see Section 5 1 5 2 3 Disconnect the catenary tube and remove the Reference Gas Cylinder from the AMH Install the...

Page 201: ...tenance Manual GFS component displays FATAL ERROR or FATAL FAULT Component encountered unresolved internal software conflict Cycle component power to clear Record conditions leading up to the event in...

Page 202: ...not match Check and correct interface configurations and cables if necessary Check LCM interface configuration in GFS Tools Setup Configuration Check MFC CB interface configuration under Setup Support...

Page 203: ...drops below the dew point of the surrounding air Gauge As in gauge pressure Pressure expressed relative to atmospheric pressure Dew point The temperature at which air cannot hold all of the moisture...

Page 204: ...GFS2102 OPERATION AND MAINTENANCE MANUAL 2007 DH Instruments a Fluke Company Page 188 9 2 TYPICAL TEST SETUPS...

Page 205: ...f this warranty such indirect damage includes but is not limited to loss of production profits revenue or goodwill even if DHI has been advised of the possibility thereof and regardless of whether suc...

Page 206: ...GFS2102 OPERATION AND MAINTENANCE MANUAL 2007 DH Instruments a Fluke Company Page 190 N NO OT TE ES S...

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