DH Instruments GFS2102 Operation And Maintenance Manual

Gravimetric flow standard

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GFS2102™

Gravimetric Flow Standard

Operation and Maintenance Manual

Table of Contents

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Summary of Contents for DH Instruments GFS2102

Page 2 The fidelity of the translation cannot be guaranteed. In case of conflict between the English version and other language versions, the English version predominates. DH Instruments, DH, DHI, GFS2102, GFS Tools, AMH, LCM, MFC-CB, molbloc and molbox are trademarks, registered and otherwise, of DH Instruments, a Fluke Company Swagelok and Nupro are registered trademarks of the Swagelok Company.
Page 3: Table Of Contents
LABORATORY CONDITIONS MONITOR ....................19 3.1.4 MFC-CB ...............................19 3.1.5 GFS-FS REFERENCE GAS CYLINDER FILL STATION ................19 3.1.6 GFS MASS BALANCE..........................20 3.1.7 AMH-GFS2102 .............................20 3.1.8 REFERENCE GAS CYLINDER ASSEMBLIES ...................21 3.1.9 SYSTEM CONTROLLER..........................22 Page I © 2007 DH Instruments, a Fluke Company...
Page 4 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 CONVENTIONS ............46 4.1.4.1 ACCUMULATIONS ..........................46 4.1.4.2 SAMPLES ..............................46 4.1.4.3 AVERAGES AND BEST FITS ........................47 4.1.5 SETTINGS FOR FLOW SAMPLING......................47...
Page 5 EDITOR TOOLBAR..........................102 5.5.2 [SETUP], [TEST]............................104 5.5.2.1 CREATING TEST DEFINITIONS ......................104 5.5.2.2 EDITING TEST DEFINITIONS .......................105 5.5.2.3 TEST POINT SEQUENCE ........................105 5.5.2.4 [PRE-TEST] TAB............................105 5.5.2.5 [CONTROL] ............................107 5.5.2.6 [DATA] ..............................108 5.5.2.7 [AUTOZERO]............................110 Page III © 2007 DH Instruments, a Fluke Company...
Page 6 G E N E R A L M A I N T E N A N C E , A D J U S T M E N T S , A N D S T O R A G E . 1 5 9 SUMMARY ............................159 AMH-GFS2102 PLATE POSITIONING POSTS LUBRICATION ............159 REFERENCE GAS CYLINDER ALIGNMENT ..................160 6.3.1...
Page 7 M A I N T E N A N C E O F T R A C E A B I L I T Y A N D R E C A L I B R A T I O N . . . 1 6 7 PRINCIPLES OF GFS2102 TRACEABILITY MAINTENANCE ............167 [PC TIMER CALIBRATION] ........................
Page 9: Tables
Table 9. MS-2102-0.7 mass set parts list ....................23 Table 10. MS-2102-CAR mass carrier parts list ..................23 Table 11: Maximum mass available for flow testing for various GFS2102 supported gases..... 45 Table 12. Main Toolbar, Run Test Tools ....................60 Table 13.
Page 10 Table 64. Calibration Editor [IR Probe] Tab Fields .................. 142 Table 65. Mechanical maintenance procedures ..................159 Table 66. Troubleshooting checklist ......................185 Table 67. DHI Authorized Service Providers ................... 189 © 2007 DH Instruments, a Fluke Company Page VIII...
Page 11 TABLES & FIGURES Figure 1. GFS2102 system .......................... 5 Figure 2. Reference gas cylinder resting on GFS balance and AMH-GFS2102 ......... 6 Figure 3. AMH reference mass plate ......................7 Figure 4. Balance mass tray supporting the reference gas cylinder ............7 Figure 5.
Page 12 Figure 90. GFS Configuration [Interface] Tab..................137 Figure 91. Calibration [Time/Mass] Tab....................138 Figure 92. Calibration [Ambient] Tab ....................... 139 Figure 93. Calibration [TH Probe #2] Tab....................140 Figure 94. Calibration [TH Probe #3] Tab....................141 © 2007 DH Instruments, a Fluke Company Page X...
Page 13 Figure 115. LCM IR probe front panel display ..................179 Figure 116. IR Probe adjustment tab ......................179 Figure 117. View of main board socket J19 or top view of calibration cable........... 182 Page XI © 2007 DH Instruments, a Fluke Company...
Page 15: A B O U T T H I S M A N U Al
This manual provides the information necessary to operate a GFS2102 gravimetric mass flow calibration standard to make gas mass flow measurements. It also provides additional recommendations and information to help you optimize use of the GFS2102 system and take full advantage of it’s many features and functions.
Page 17: 1. Introduction
10 sccm to 10 slm in most gases. GFS2102 measures gas mass flow by measuring the loss of mass from a reference gas cylinder over a measured period of time. The reference gas cylinder assembly rests on the GFS mass balance and flow is transmitted from the cylinder through a flow path designed to have minimal effect on the balance mass measurement.
Page 18: Gfs2102 Mass Balance Specifications
± 0.2 Uncertainty Temperature: [°C] Range 15 to 30 ± 1.0 Uncertainty Relative Humidity: 5 to 95 %RH Range ± 10 %RH Accuracy 1.1.3.5 BALANCE READING TIME MEASUREMENT Time: 32 ppm © 2007 DH Instruments, a Fluke Company Page 2...
Page 19: Mfc-Cb Specifications
Voltage Accuracy Voltage Resolution 1 mVDC Current Range 4 to 20 mA 1.1.5 FLOW MEASUREMENT SPECIFICATIONS less than ± 0.05% of reading Repeatability less than ± 0.1% of reading Measurement Uncertainty Page 3 © 2007 DH Instruments, a Fluke Company...
Page 21: S Y S T E M O V E R V I Ew
GFS2102 covers the range of 10 sccm to 10 slm in most gases. All measurement functions of the GFS2102 system are managed 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, which is the user interface for the GFS2102 instrument.
Page 22: Balance And Amh-Gfs2102
BALANCE AND AMH-GFS2102 GFS2102 measures the changing reference gas cylinder mass 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.
Page 23: Figure 3. Amh Reference Mass Plate
Figure 3. AMH reference mass plate AMH-GFS2102 lifts the reference gas cylinder vertically only 3 mm when unloading it from the balance so that the gas flow is not disturbed and no unnecessary deflection of the gas conveyance loop takes place.
Page 24: Reference Gas Cylinder Assembly
GFS2102™ OPERATION AND MAINTENANCE MANUAL REFERENCE GAS CYLINDER ASSEMBLY The GFS2102 reference gas cylinder assembly is built around a high pressure carbon fiber composite cylinder. In addition to the cylinder itself, the assembly includes a cylinder support, a cylinder connector with fill port and valve, and a two stage welded regulator assembly.
Page 25: Cylinder Support
2. SYSTEM OVERVIEW There are two different reference gas cylinder sizes offered with the GFS2102 system, a 1.1 liter cylinder and a 1.5 liter cylinder. The two cylinders are offered to accommodate the greatly varying gas densities that can be used with the system (see Section 4.1.2). The cylinders are rated for a maximum working pressure of 20 MPa (3000 psi) for the 1.1 liter...
Page 26: Reference Gas Cylinder Connector
Figure 8. Reference gas cylinder connector Fill valve Regulator stem port Fill port © 2007 DH Instruments, a Fluke Company Page 10...
Page 27: Regulator Assembly
For assembling the reference gas cylinder, always follow the instructions in section 3.1.8. For filling the cylinder, always follow the instructions in Section 4.3. Page 11 © 2007 DH Instruments, a Fluke Company...
Page 28: Gfs Draft Enclosure And Vibration Isolation Table
35.4” x 5.9”) and has ledges which are used as a connection point for the draft enclosure mounting brackets. The table top rests on a steel stand. Figure 9. GFS draft enclosure on vibration isolation table © 2007 DH Instruments, a Fluke Company Page 12...
Page 29: Laboratory Conditions Monitor (Lcm)
Figure 10. Laboratory Conditions Monitor MFC-CB MFC-CB is used for controlling flow setpoint signals to mass flow controllers included in the GFS2102 system. It may also be used for reading the output of a device under test that has an analog signal output.
Page 30: Gfs Tools
GFS-FS REFERENCE GAS CYLINDER FILL STATION A specialized filling station is provided with the GFS2102 system to help users fill the reference gas cylinders safely and slowly with minimal heating of the cylinder. The design of the fill station allows the user to quickly set the desired fill pressure and the cylinder is filled at a slow rate that is controlled by a flow limiter.
Page 31: Molbloc Molstics (Optional)
100g mass, which in combination allows for a measurement every 100g up to 2.3kg. For detailed instructions on the use of the mass carrier and masses see section 7.8.3. Page 15 © 2007 DH Instruments, a Fluke Company...
Page 33: I N S T A L L A T I O
UNPACKING AND INSPECTION Check that all items included in the GFS2102 system are present and have NO visible signs of damage. A parts list of the major components supplied and how they are packed is provided in Table 1. Unpack and inspect the items following the instructions in Sections 3.1.1 to 3.1.11 and detailed parts lists in...
Page 34: Gfs Draft Enclosure And System Accessories
The granite table is shipped along with a 100 lb steel support stand. For use with the GFS2102 system, the table will be aligned so that the widest dimension is seen from the front of the system.
Page 35: Laboratory Conditions Monitor
The GFS-FS reference gas cylinder fill station is shipped in a corrugated container along with an accessory kit that is sealed in plastic. Open the corrugated container and remove the accessories and fill station. Table 5 details all items included with the GFS-FS. Page 19 © 2007 DH Instruments, a Fluke Company...
Page 36: Gfs Mass Balance
3.1.7 AMH-GFS2102 The AMH-GFS2102 automated mass handler is shipped in two or more corrugated containers. There are 4 main parts to the AMH that are disassembled prior to shipment; The AMH base, the reference mass, reference mass plate and top plate.
Page 37: Reference Gas Cylinder Assemblies
3.1.8 REFERENCE GAS CYLINDER ASSEMBLIES Reference gas cylinder assemblies are not included with the base GFS2102 system, so the customer has the option to purchase one or more with their system. Often, a set of two cylinder assemblies are ordered and delivered with the GFS system, one of the smaller 1.1 liter cylinder assemblies with 690 kPa (100 psi) output and one of the larger 1.5 liter cylinder...
Page 38: System Controller
The system controller consists of a personal computer, flat screen display, keyboard and pointing device (“mouse”). These are packed in (2) to (4) corrugated containers, depending on configuration. The system controller is delivered with all necessary GFS2102 system software pre-loaded including GFS Tools™. The part number of the system controller is 103388.
Page 39: Ms-2102-0.7 Mass Set Or Ms-2102-Car Mass Carrier
The MS-2102-0.7 mass set and the MS-2102-CAR mass carrier are not included in the GFS2102 base system but may be purchased with the system. The full mass set may be purchased, which includes a mass carrier, or the mass carrier may be purchased alone.
Page 40 Vacuum pump: Vacuum is not required for the operation of the GFS2102 system. If the device under test is a molbloc-S or other device that may be used with vacuum, plan to locate the vacuum pump so that heat, noise and vibration do not have negative effect on the system and consider electrical supply needs of the pump.
Page 41: Gfs-Fs Reference Gas Cylinder Fill Station
GFS-FS is 20 MPa (3000 psi). The supply media should be a clean, dry gas. Gas purity is an important factor in the quality of GFS2102 flow measurements, so the highest level of gas purity is recommended. Accurate measurement of 17 pure gases is supported with GFS2102.
Page 42: Setup
Before setting up the GFS2102 system, see Section 3.2 for information on site requirements. To set up the GFS2102 system, first unpack it following the instructions in Section 3.1. Then follow the set up instructions in Sections 3.3.1 to 3.3.14 sequentially.
Page 43: Install Draft Enclosure On Vibration Isolation Table
When closed, the doors should be in contact with the rubber seal along the entire edge of the draft enclosure. Page 27 © 2007 DH Instruments, a Fluke Company...
Page 44: Setup Lcm
Connect the 9 pin D-sub cable that runs into the draft enclosure to the COM2 port on the rear panel of the LCM. Connect the LCM power cord to the connector labeled 12 VDC on the LCM rear panel. © 2007 DH Instruments, a Fluke Company Page 28...
Page 45: Setup Mfc-Cb
LCM calibration report. This data is stored inside each individual TH probe and is read by the LCM and into GFS Tools. The probes must be connected to the LCM to access the data. Page 29 © 2007 DH Instruments, a Fluke Company...
Page 46: Assemble Reference Gas Cylinder(S)
GFS Tools. 3.3.7 ASSEMBLE REFERENCE GAS CYLINDER(S) The GFS2102 reference gas cylinder assembly includes the reference gas cylinder, the regulator assembly, the reference gas cylinder connector, and the cylinder support. (See Figure 15.) Figure 15. Reference gas cylinder assembly...
Page 47: Figure 16. Reference Gas Cylinder Connector
Tightening the DH200 gland will rotate the regulator assembly a few degrees clockwise, so it will be necessary to offset the regulator assembly before tightening so that it finishes in the correct position. Page 31 © 2007 DH Instruments, a Fluke Company...
Page 48: Enter Reference Gas Cylinder Data
Invert the AMH plate painted side down on a flat surface, taking care not to damage the painted surface. Padding or cloth of some kind would help keep the surface from damage. Step 1 © 2007 DH Instruments, a Fluke Company Page 32...
Page 49 If a screw is lost or misplaced the entire assembly needs to be recalibrated with the replacement screw. When picked up and carefully turned back over the reference mass should hang freely and evenly below the plate. Page 33 © 2007 DH Instruments, a Fluke Company...
Page 50: Initial Balance And Amh Base Setup
Place the GFS balance on the granite surface inside the draft enclosure. Place the AMH-GFS2102 base over the balance so that the base surrounds the balance. Connect the balance positioning bracket to the front wall of the AMH base using the two screws and lock washers provided.
Page 51: Setup Balance Location
A. Loop alignment tool. reference gas cylinder assembly and the draft enclosure sidewall column allows the correct shape of the catenary gas conveyance loop. The distance is set by using the loop alignment tool, Page 35 © 2007 DH Instruments, a Fluke Company...
Page 52: Amh Position Fine Adjustment
3.3.12 AMH POSITION FINE ADJUSTMENT Proper position of the AMH-GFS2102 assembly relative to the GFS balance is critical to making accurate mass and flow measurements under flowing conditions. When the reference gas cylinder 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 sensitivity.
Page 53: Figure 23. Reference Gas Cylinder Resting On Balance. Amh Top Plate Installed; Reference Mass Plate Uninstalled
Leaving the balance in place, make small movements AMH- GFS2102 base postion in order to ensure clearance of the reference gas View of cylinder support legs Figure 24. cylinder legs and engage the cylinder through AMH top plate.
Page 55: Prepare The Heat Exchanger
While water can be used alone, it is recommended to use a 50/50 mix of water and antifreeze due to the prolonged period of time that the liquid would be expected to remain in the exchanger. Figure 26: Heat Exchanger, Low Page 39 © 2007 DH Instruments, a Fluke Company...
Page 56: Connect The Dut Flow Path
GFS, regulating the pressure and connecting the device to be tested. Highest quality components are integrated into a compact assembly to assure optimum molbloc/molbox performance. Figure 28: Single, Low flow molstic © 2007 DH Instruments, a Fluke Company Page 40...
Page 57: Connect Gas Conveyance Loop
After connecting the gas conveyance loop, check again that a stable mass indication can be viewed in GFS Tools software before starting to flow. This indicates that the balance, cylinder and AMH are still in correct position. Page 41 © 2007 DH Instruments, a Fluke Company...
Page 59: O P E R A T I O
4. OPERATION After the GFS2102 system has been setup, much of the operation of the system is done using the system controller running GFS Tools software. The features and operation of GFS Tools are described in detail in Section 5 of this manual. Section 4 is intended to provide a concise description of important GFS Tools selections and physical operations required for effective use of the GFS2102 system.
Page 60: Gas Dependent Mass Ranges And Cylinder Size Selection
4.1.2 GAS DEPENDENT MASS RANGES AND CYLINDER SIZE SELECTION Table 11 shows the maximum mass for of each GFS2102 supported gas that will be available for flow testing after a reference gas cylinder fill. Typical supply cylinder fill pressures are listed in the table but actual fill pressures may vary from different gas suppliers and locations.
Page 61: Table 11: Maximum Mass Available For Flow Testing For Various Gfs2102 Supported Gases
4. OPERATION Table 11: Maximum mass available for flow testing for various GFS2102 supported gases. TYPICAL 1.1 LITER CYLINDER 1.5 LITER CYLINDER SYMBOL SUPPLY (MAXIMUM MASS 655g) (MAXIMUM MASS 210g) CYLINDER FILL PRESSURE TYPICAL TYPICAL TYPICAL MAXIMUM TYPICA MAXIMUM FILL...
Page 62: Autozero
4.1.3 AUTOZERO In order for the GFS2102 mass measurements to be made with the precision and repeatability that is required for the system’s target flow uncertainties, the drift of the balance that occurs over time must be removed from the GFS mass measurements. The AMH-...
Page 63: Averages And Best Fits
One could say that the only calculated flow rate or DUT flow error that is important for a GFS2102 accumulation is the one that is determined at the end of the accumulation when uncertainty is minimized. But it is instructive for the user to view the real- time changes in calculated flow or flow error as the accumulation progresses.
Page 64: Setting Up Starting And Ending Sample Tolerance
4.2.1 READING THE BALANCE It is necessary to read the balance during setup of the GFS2102 system to ensure that it is communicating correctly and the positioning of the balance and AMH-GFS2102 allows stable mass indications. At any time, to quickly get a direct indication from the balance, first run a diagnostic test using [Run][Run Diagnostic Test].
Page 65: Amh Operation
It will be necessary for the GFS2102 user to regularly refill the reference gas cylinders between tests. Filling of the cylinders is done using the GFS-FS reference gas cylinder fill station. The fill station is specifically designed for filling the reference gas cylinders at a slow rate so that heating of the cylinder is minimized.
Page 66: Evacuating And Rinsing
Stems with plugs are provided with the GFS2102 system to allow a positive seal to the cylinder to be made when a filled cylinder sits disconnected from the flow system.
Page 67: Filling The Cylinder
GFS-FS regulator clockwise until gas can be heard venting from the reference gas cylinder fill port DH200 connection that was left loose in Section 4.3.3. Allow a few moments (~5 seconds) for purging, then tighten the DH200 connection. Page 51 © 2007 DH Instruments, a Fluke Company...
Page 68 Disconnect the DH200 fitting from the reference gas cylinder fill port, reinsert the fill plug into the fill port, and tighten the fill plug. • To transport the reference gas cylinder assembly back to the GFS2102 work area, securely close and latch its case and transport it inside the case. •...
Page 69: Considerations For Making Reliable Measurements
5.5.2.8). 4.4.2 STABILITY OF AMBIENT CONDITIONS The automated nature of the GFS2102 system allows users to select the time to run test that is best suited to making the best measurements. Two common examples of changing conditions that can be avoided are a warm cylinder that has been recently filled and needs to cool, or a laboratory area which experiences significant changes in temperature and humidity throughout the day.
Page 70: Comparing Reference And Dut Measurements Using Flow Vs. Mass Calculations
DUT measurements in either total mass or mass flow terms. A pure view of the gravimetric nature of the GFS2102 system may lead one to suspect that using total mass eliminates some time-related uncertainty from the GFS measurement and is a more correct choice.
Page 71: Leak Test Option In A Test Definition
If an MFC is in the flow path included in the leak check then the user must ensure that the setpoint is high enough to fully open the MFC valve and allow the pressure to equalize across the MFC or a leak could be falsely indicated. An Page 55 © 2007 DH Instruments, a Fluke Company...
Page 72: Flow Control And Stability
The MFC’s are typically designed to be able to work in the gas they are calibrated for down to 5% of full scale, but for the GFS2102 it is recommended to switch to a lower range MFC if operating below 10% of full scale for improved flow control and stability.
Page 73: G F S T O O L S S O F T W A R
GFS system without a complete initialization. GFS flow data cannot be acquired in this mode of operation. See Section 5.6.3 for additional information on this mode. [Exit] Close GFS Tools. © 2007 DH Instruments, a Fluke Company Page 57...
Page 74: Setup]
Tool. The Plot Tool provides features to create custom 2D and 3D plots (see 5.3.3). [Report Editor] Run the COMPASS Report Editor to generate a report from a Test Data File (see 5.3.4). © 2007 DH Instruments, a Fluke Company Page 58...
Page 75: Window]
100 %. Each test point increments the progress indicator. When [Skip Back] and [Skip Forward] buttons are used, the progress indicator also reflects the current position. Figure 33. Progress Indicator Page 59 © 2007 DH Instruments, a Fluke Company...
Page 76: Main Toolbar
Each of the toolbar icons forces the corresponding run screen to the top of the display. Run display tools are available based on the current run mode and the data acquisition state of an active test. © 2007 DH Instruments, a Fluke Company Page 60...
Page 77: Data Acquisition Tools
Points can be taken individually, averaged individually and averaged automatically. When the run mode is ended or a new Data File is created, the [Options], [End Test] and Page 61 © 2007 DH Instruments, a Fluke Company...
Page 78: Table 14. Toolbar, Data Acquisition Options
To change the automatic averaging time select it in the menu and enter the desired averaging time in the input box that follows. Data can be automatically averaged from 1 to 9999s. Figure 35. Manual Averaging Options © 2007 DH Instruments, a Fluke Company Page 62...
Page 79: Run Screens
A test continues to run even if all run screens are closed. The [Window] menu includes cascade and tile options for common default displays. The combination of these features makes the user interface totally customizable. Page 63 © 2007 DH Instruments, a Fluke Company...
Page 80: Gfs Run Screen
3. GFS Control Toolbar: The GFS Control Toolbar buttons are for controlling GFS specific functions. Figure 37. GFS Run Screen The features on the GFS Run Screen are summarized in the tables below. © 2007 DH Instruments, a Fluke Company Page 64...
Page 81: Table 15. Gfs Control Panel Fields
GFS. (see section 3.3.13, Setup probe locations) The current calibration gas selected at the start of a manual test or defined in Calibration Gas a Test Definintion. Page 65 © 2007 DH Instruments, a Fluke Company...
Page 82: Figure 39: Gfs System Display Section Of Gfs Run Screen
The lines move slowly at low flows and progressivly faster at higher flows. This is a animated representation only and is not based on the actual flow of gas. Figure 39: GFS System Display section of GFS Run Screen © 2007 DH Instruments, a Fluke Company Page 66...
Page 83: Table 16. Gfs System Display Fields
AutoZero the GFS. The GFS AMH lowers the reference mass onto the balance and determines a correction for any drift in the balance since the last Balance Zero or AutoZero. Page 67 © 2007 DH Instruments, a Fluke Company...
Page 84: Gfs Diagnostics Run Screen
All data relevant to the gravimetric flow is available on the display. This feature is provided for trouble shooting purposes only. The information displayed is logged in an SDF file when the option is enabled. © 2007 DH Instruments, a Fluke Company Page 68...
Page 85: Table 18. Gfs Diagnostics Fields
The duration of the rolling average is controlled by the GFS Tools configuration. Accumulated Mass The accumulated mass of the balance. The value here is identical to the mass value in the <Depleted Mass/Time> field. The information is repeated here for convenience. Page 69 © 2007 DH Instruments, a Fluke Company...
Page 86: Balance Output Run Screen
(not provided). No AMH state manipulation operations are imposed before taring. This feature is provided for balance specific operation only. Balance Zero For normal system operation use the [Balance Zero] button on the GFS run screen. © 2007 DH Instruments, a Fluke Company Page 70...
Page 87: Ambient Conditions Run Screen
Ambient Humidity Ambient humidity as indicated by the LCM internal humidity probe. This output indicates the ambient humidity surrounding the LCM. This output is not directly used by GFS Tools. Page 71 © 2007 DH Instruments, a Fluke Company...
Page 88: Dut/Reference Comparison Run Screen
[Strip Chart] option to create a strip chart using the selected output. Figure 44. DUT/Reference Comparison Run Screen The display features of the DUT/Reference Comparison Run Screen are listed in the table below. © 2007 DH Instruments, a Fluke Company Page 72...
Page 89: Device Output Run Screen
This makes it easy to view the commands used to generate a specific output or response in GFS Tools. To view a Spy Window, click the <Final Output> of any output and select [Spy Window] from the popup menu. Page 73 © 2007 DH Instruments, a Fluke Company...
Page 90: Spy Windows
GFS Tools or the wrong Spy Window is being viewed. The actual device interface used can be modified during Test Initialization. © 2007 DH Instruments, a Fluke Company Page 74...
Page 91: Molbox Output Run Screen
When a molbloc-S does not have a valid back pressure ratio (BPR), the displayed flow is N/A. Figure 47. <molbox Output> Run Screen Page 75 © 2007 DH Instruments, a Fluke Company...
Page 92: Table 23. Run Screen Fields
Operation and Maintenance Manual, Ready/Not Ready Section, for additional information. molbloc The serial number and molbox channel of the active molbloc. The molbloc channel displays only when a two channel molbox is the active reference. © 2007 DH Instruments, a Fluke Company Page 76...
Page 93: Tare Molbox
<Continue> button to complete the tare process and resume normal operation. See Table 24 for information on each of the tare molbox panel fields. Figure 48. molbox Output Run Screen in Tare Mode Page 77 © 2007 DH Instruments, a Fluke Company...
Page 94: Mfc-Cb Run Screen
The ability to change the analog set point of the MFC-CB using the MFC-CB run screen is provided for troubleshooting purposes. Only MFC-CB channels specifically activated during Test Initialization are enabled on the MFC-CB run screen. Figure 49. MFC-CB Run Screen © 2007 DH Instruments, a Fluke Company Page 78...
Page 95: Data Grid Run Screen
[Options], [Grid] tab is not selected, the current cycle test data is not automatically displayed on the plot unless that cycle is specifically selected for plotting. For example, if flow point 3 of a 10 point test is currently plotted, and the Page 79 © 2007 DH Instruments, a Fluke Company...
Page 96: Tools] Menu
Each Test Definition contains a unique set of zero and AutoZero options. The purpose of the [Run Test] tab fields and settings as well as instructions on how to use them are provided in Table 26. © 2007 DH Instruments, a Fluke Company Page 80...
Page 97: Table 26. Options, [Run Test] Tab Fields
AutoZero should run approximately every 300 seconds (5 minutes). This minimizes the interval absolute drift correction and provides a more continuous accumulation error plot. In very (check box) stable environments this interval can be extended. Page 81 © 2007 DH Instruments, a Fluke Company...
Page 98 Abort accumulation is not checked, user intervention is required to stop the accumulation. This option affects after target mass is manual tests only. By default this option is checked. reached (check box) © 2007 DH Instruments, a Fluke Company Page 82...
Page 99: Initialize Test] Tab
Check this option to always use 1 as the K factor for a DHI molbloc DUT. This option is provided to help avoid logging erroneous or inconsistent data caused by an incorrect K factors for DHI factor. products (check box) Page 83 © 2007 DH Instruments, a Fluke Company...
Page 100: End Test] Tab
Selecting a fixed repeat point delay, deactivating the test notes and enabling the auto report generation can allow an automated test to run and generate a complete report without user intervention. Figure 54. Options, [End Test] Tab © 2007 DH Instruments, a Fluke Company Page 84...
Page 101: Data File] Tab
The purpose of the [Data File] tab fields and settings as well as instructions on how to use them are provided in Table 29. When selections are complete, click [OK] to save changes or select another tab to change other options. Page 85 © 2007 DH Instruments, a Fluke Company...
Page 102: Table 29. Options, [Data File] Tab Fields
99 before a new directory would need to be created. The <molbloc SN> and <Calibration Gas> selections are recommended for these fields. The resulting file would appear similar to “ xxxxN2_001.dat ” © 2007 DH Instruments, a Fluke Company Page 86...
Page 103: Data Grid] Tab
GFS Tools default data fields. Instructions on the operation of the [Grid] tab are provided in Table 30. When selections are complete, click [OK] to save changes or select another tab to change other options. Page 87 © 2007 DH Instruments, a Fluke Company...
Page 104: Figure 56. Options, [Data Grid] Tab
Add or remove the selections by using the appropriate shift button. Sort the <Columns in grid> display by selecting an item then using the UP or DOWN arrow keys while holding the CTRL button Figure 56. Options, [Data Grid] Tab © 2007 DH Instruments, a Fluke Company Page 88...
Page 105: Unit Of Measure Converter]
COM2 port. Then send commands with the COM2 prefix required by the product. In most cases, the prefix “#” will work. Refer to the Operation and Maintenance manual of the specific product for details on the pass through support Page 89 © 2007 DH Instruments, a Fluke Company...
Page 106: Process Gas Editor]
Refer to the on-line help in the Process Gas Editor for details on using this program. Defining specific gas conversion information based on gas and manufacturer simplifies the DUT and Support Device setups. GFS Tools automatically obtains the correct K-Factor © 2007 DH Instruments, a Fluke Company Page 90...
Page 107: Change Gfs Amh State]
Data File without leaving GFS Tools. For this purpose, the Data File Viewer is provided. This tool is accessible using [Data], [View Data File]. Page 91 © 2007 DH Instruments, a Fluke Company...
Page 108: Table 31. Data File Viewer Options
The data in the grid is equivalent to the data that would be displayed in MS Excel if the proper Data File delimiter were selected. Plot the current Data File. Refer to section 5.3.3, for details on how to use the plot tool. Plot Data © 2007 DH Instruments, a Fluke Company Page 92...
Page 109: Plot Data]
Print the displayed plot using the standard Windows print function. Create/Edit Plot Displays the Custom Plot Editor loaded with all existing plots. The editor allows plots to be created, edited and removed (see 5.3.3.3, Create/Edit Plots). Page 93 © 2007 DH Instruments, a Fluke Company...
Page 110: Plot Options Menu
[Properties] button. This displays the plot properties dialog that allows customization of the non data related plot features. © 2007 DH Instruments, a Fluke Company Page 94...
Page 111: Table 33. Custom Plot Editor Fields
(button) Exit Closes the Custom Plot Editor. (button) Edit Begins the editing the currently selected plot. Only when this button is pressed can changes be made to a custom plot. (button) Page 95 © 2007 DH Instruments, a Fluke Company...
Page 112: Plot Points
[General] tab and multiple flow points are selected. When the selected plot type uses %Reading Error, %Span Error or DUT Difference on the Y-Axis, an additional tab is available to plot best fit error data. © 2007 DH Instruments, a Fluke Company Page 96...
Page 113: Table 34. Plot Points General Tab Fields
Include subset Check this option to display a legend at the top of the plot to for each subset. Do not legend check this option when many subsets will be used. (button) Page 97 © 2007 DH Instruments, a Fluke Company...
Page 114: Report Data]
Use the [Help][On-Line Manual] menu choice for complete information on this program. Several default report templates are installed with the software. Use these templates as examples on how to create new templates to better customize a report. © 2007 DH Instruments, a Fluke Company Page 98...
Page 115: Data Files
By default, the DUT serial number is used (specified in the DUT Definition). The DUT based sub directories are automatically created by GFS TOOLS in the designated Root Data File Directory. The automated Data File name follows the format defined by the [Tools], [Options], [Data Page 99 © 2007 DH Instruments, a Fluke Company...
Page 116: Data File Structure
Unlike Compass for Flow, the information logged in the Data File is not user selectable, all data related to the test is logged for every test. Data Files have 6 distinct sections: General Header, © 2007 DH Instruments, a Fluke Company Page 100...
Page 117: Table 38. Data File Structure
[TEST TEMPERATURE] section subsequent [TEST FLOW POINT] [TEST ACCUMULATION] for each test temperature point. Test Notes [NOTES] Multi line test notes specified by the user at the end of a test. Page 101 © 2007 DH Instruments, a Fluke Company...
Page 118: Setup] Menu
Use the scrollbar or the [Select from List] toolbar icon to pick a setup to edit. A label flashes “Editing” when any changes to an existing setup are made or a new setup is created. Use the [Restore] toolbar icon to undo undesired changes. © 2007 DH Instruments, a Fluke Company Page 102...
Page 119: Table 39. Editor Toolbar Features
If a new setup was created using the [New] icon, the restore button is nonfunctional as the is no previous saved state to restore to. (toolbar icon) Page 103 © 2007 DH Instruments, a Fluke Company...
Page 120: Setup], [Test]
Since new Test Definitions have not been saved, there is nothing to restore. Familiarity with test execution sequence is necessary for proper setup of a Test Definition. Review the Run Test Sequence section of this manual. © 2007 DH Instruments, a Fluke Company Page 104...
Page 121: Editing Test Definitions
The Test Editor, [Pre-Test] tab defines operations that occur before a test begins. The selections are intended to help ensure the validity of the data collected during the test (see Figure 66). Page 105 © 2007 DH Instruments, a Fluke Company...
Page 122: Table 40. Test Editor, [Pre-Test] Tab, Fields
(numeric entry field) entered, the leak test has failed. See Section 4.4.4 for more information. © 2007 DH Instruments, a Fluke Company Page 106...
Page 123: Control]
The ready hold time can be used to assure that the output remains stable for a certain amount of time before the stability test is considered to have been met and test execution to continue. Page 107 © 2007 DH Instruments, a Fluke Company...
Page 124: Data]
The frame surrounding the [Data] tab includes the flow point that the [Data] tab currently represents. Click a different flow point to view [Data] tab selections specific to a new point. © 2007 DH Instruments, a Fluke Company Page 108...
Page 125: Table 42. Test Definition Editor [Data] Tab Fields
<Mass to Deplete> is manually entered Averaging Time Enter the averaging time to use for data collection. To take instantaneous data points enter 0 as the averaging time. (required numeric entry field) Page 109 © 2007 DH Instruments, a Fluke Company...
Page 126: Autozero]
Tests that define flow points with relatively short accumulations do not require frequent AutoZero operations. Under typical lab conditions an AutoZero should be performed every 5 minutes. Figure 69. Test Definition Editor [AutoZero] Tab © 2007 DH Instruments, a Fluke Company Page 110...
Page 127: Options]
[OPTIONS] The [Options] tab provides features to further customize a Test Definition. The choices on this tab are not required for good test operation. Figure 70. Test Definition Editor [Options] Tab Page 111 © 2007 DH Instruments, a Fluke Company...
Page 128: Comment]
Test Definition. Enter any text desired to help to describe test specific requirements or selections. © 2007 DH Instruments, a Fluke Company Page 112...
Page 129: Dut ]
Select the [Output] tab and enter all relevant output and tolerance information. Press the Editor Toolbar, [Save] icon to save all changes. Any errors in the setup must be remedied before the DUT Definition can be saved. Page 113 © 2007 DH Instruments, a Fluke Company...
Page 130: Header] Tab
The DUT is used for flow measurement only. down list DUT Controller The DUT is available for flow measurement and can be selected as a selection; flow controller during Test Initialization. DUT Editor only) © 2007 DH Instruments, a Fluke Company Page 114...
Page 131 Instead, the serial number can be entered during test initialization. The default Data File directory naming preference can use the DUT <Serial Number> to create the data directory for date files when running tests. Page 115 © 2007 DH Instruments, a Fluke Company...
Page 132: Calibration] Tab
Use the <Calibration Setting> fields to store calibration settings for an instrument. Not only is this information available for reporting. The user controls the format and use of the data. Figure 73. DUT Editor, [Calibration] Tab © 2007 DH Instruments, a Fluke Company Page 116...
Page 133: Communications] Tab
Select the desired data acquisition type and enter the settings appropriate for the selection. By default, GFS Tools will perform all communications with the device following the data acquisition type specified. Automated remote interfaces such Page 117 © 2007 DH Instruments, a Fluke Company...
Page 134: Figure 75. Dut Definition Editor [Communications] Tab
In this case, the signal conditioner can be considered part of the DUT included in the DUT Definition. Therefore, the remote commands for the conditioner should be specified with the DUT Definition. Figure 75. DUT Definition Editor [Communications] Tab © 2007 DH Instruments, a Fluke Company Page 118...
Page 135: Table 47. Device Editor, [Communications] Tab Fields
The maximum length of time for the device to wait for a response from a remote command. If a response is not received within this amount of time, a timeout occurs. Timeout(s) (numeric entry; remote interface <Data Acquisition Type> only) Page 119 © 2007 DH Instruments, a Fluke Company...
Page 136: Remote Command Editor
Specify a <Command Number> to define the order in which the command will be issued. GFS Tools automatically adjusts the numbering order when the command set is saved. It is not necessary to remove gaps in the numbering sequence. © 2007 DH Instruments, a Fluke Company Page 120...
Page 137: Figure 76. Remote Command Editor
Not limit is imposed on the number of commands that can be used in a command set. Page 121 © 2007 DH Instruments, a Fluke Company...
Page 138 Not all options are available in both Read and Set command sets. Options on the [Command] tab apply to the selected command in the <Commands> list only and not the entire command set and not just the selected command. © 2007 DH Instruments, a Fluke Company Page 122...
Page 139: Table 48. Remote Command Editor, [Command] Tab Fields
The <Apply (check box used for Set> option determines how this manipulation is handle . Set Command Sets only) Page 123 © 2007 DH Instruments, a Fluke Company...
Page 140: Table 49. Remote Command Editor, [Global Settings] Tab Options
Shared interfaces use the same remote resources. If a faster refresh rate on one output is more desirable relative to another one, increase the delay interval to slow down the less desirable command. © 2007 DH Instruments, a Fluke Company Page 124...
Page 141: Output] Tab
<Raw Output> as a flow, current, voltage, etc. The unit of measure specified is the unit in which the <Raw Output> must be acquired by the selected <Data Acquisition Type> on the [Communications] tab. This is Page 125 © 2007 DH Instruments, a Fluke Company...
Page 142: Table 50. Dut Editor, [Output] Tab Fields
(conditional numeric entry) Maximum Enter the maximum raw output or final output value. The value entered must correspond to the output unit selected. (conditional numeric entry) © 2007 DH Instruments, a Fluke Company Page 126...
Page 143: Table 51. Tolerance Type Choices
This tolerance is graphically equivalent to %Span. Const in Raw Unit The tolerance is a constant value entered in terms of the raw output unit of measure. This tolerance is graphically equivalent to %Span. Page 127 © 2007 DH Instruments, a Fluke Company...
Page 144: Comment] Tab
Device Definition. Enter any text desired to help to describe test specific requirements or selections. © 2007 DH Instruments, a Fluke Company Page 128...
Page 145: Support Hardware]
GFS Tools. The actual cylinder to use during a test is selected during Test Initialization. Refer to section 5.7.5 for details on the math associate with buoyancy corrections applied to the reference gas cylinder. Page 129 © 2007 DH Instruments, a Fluke Company...
Page 146: Table 53. Reference Cylinder Editor Fields
(required numeric entry) External volume of The external volume of the reference gas cylinder excluding the volume of fixed cylinder regulators and accessories. (required numeric entry) © 2007 DH Instruments, a Fluke Company Page 130...
Page 147: Configuration]
Press [Default] on any of the tabs to return to the active tab to the default condition. 5.5.6.1 [SYSTEM] The [System] tab defines options related to GFS operation and sampling. Figure 84. GFS Configuration [System] Tab Page 131 © 2007 DH Instruments, a Fluke Company...
Page 148: Table 54. Gfs Configuration Editor [System] Tab Fields
Cylinder and the connection to the DUT. GFS Tools activates this valve to force zero flow (required check box for leak test and when a test is complete. selection) © 2007 DH Instruments, a Fluke Company Page 132...
Page 149: Gfs Amh
This limit is imposed when running an AutoZero while not flowing. This AMH change(g) protection is provided for the occasions in which the AMH is out of alignment and a stable (required numeric entry) value cannot be read from the balance. Page 133 © 2007 DH Instruments, a Fluke Company...
Page 150: Limits]
When the reference gas cylinder temperature decreases beyond this limit relative to the dew point temperature, a “D” displays in the ready indicator on the GFS Run Screen. © 2007 DH Instruments, a Fluke Company Page 134...
Page 151: Lcm]
RS232 settings for the LCM is 19200, N, 8, 1. It is recommended to use COM1 of the (Required interface System Controller for the LCM. Double-clicking this field brings up the interface settings setting) window (Figure 88). Page 135 © 2007 DH Instruments, a Fluke Company...
Page 152: Balance]
The balance model number, i.e. “XP2004S” Model (Optional alphanumeric entry) The balance serial number. Serial Number (Optional alphanumeric entry) Other identification of the Balance, such as customer equipment numbers. Identification (Optional alphanumeric entry) © 2007 DH Instruments, a Fluke Company Page 136...
Page 153: Interface]
RS232 port will not be available in the RS232 setup. If this is the case uncheck this option (required check box to list serial ports 1-255 when selecting available com ports. selection) Page 137 © 2007 DH Instruments, a Fluke Company...
Page 154: Calibration]
(Required numeric entry field) In the unlikely event that this value ever needs adjustment, adjustments greater than one count should be regarded with skepticism. See Section 7.5.3.3 for instruction on adjusting this value. © 2007 DH Instruments, a Fluke Company Page 138...
Page 155: Ambient]
Calibration Date – Automatically updates to the date a new adder or multiplier are entered in the above fields and written to the LCM. See Section 7.5.4.4 for instructions on LCM Humidity calibration. Page 139 © 2007 DH Instruments, a Fluke Company...
Page 156: Th Probe #2]
Calibration Date – Automatically updates to the date a new adder or multiplier are entered in the above fields and written to the LCM. See Section 7.5.5.2 for instructions on TH probe Humidity calibration. © 2007 DH Instruments, a Fluke Company Page 140...
Page 157: Th Probe #3]
5. GFS TOOLS SOFTWARE 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 141 © 2007 DH Instruments, a Fluke Company...
Page 158: Ir Probe]
See Section 7.5.7 for instructions on IR Probe humidity calibration. [RUN] MODES All run modes are accessed from the [RUN] menu. There are three run modes; [RUN TEST], [RUN MANUAL TEST], and [RUN DIAGNOSTIC TEST]. © 2007 DH Instruments, a Fluke Company Page 142...
Page 159: Run Test
Selecting a Reference Gas Cylinder other than the actual Cylinder in use will not harm the system, but will drastically affect the accuracy and uncertainty of the readings due to incorrect buoyancy and mass corrections. Figure 97: Run Test - Setup Test Definition window Page 143 © 2007 DH Instruments, a Fluke Company...
Page 160: Figure 98: Run Test - Select Test Definition Window
Select the DUT(s) to be run (see Figure 99). Typically with a molbloc the molbox is the defined DUT, and the molbloc range and information are read into GFS Tools through the molbox interface. Select “Next”. Figure 99: Run Test - Select DUTs window © 2007 DH Instruments, a Fluke Company Page 144...
Page 161: Figure 100: Run Test - Configure Dut Device Window
Figure 101). This selection is predefined in the test but can be changed at this step to another flow controller, i.e. manual control. Select “Next”. Figure 101: Run Test - Setup Flow Controller window Page 145 © 2007 DH Instruments, a Fluke Company...
Page 162: Figure 102: Run Test - Configure Mfc Device Window
Until this condition is acknowledged by the user all further test execution is halted. Figure 103: Run Test - Initializing Test Instruments window © 2007 DH Instruments, a Fluke Company Page 146...
Page 163: Run Manual Test
Select “Next”. Verify the communications setting and load the DUT information on the “Configure Device” window (see Figure 100). Verify the DUT information and select “Next”. Repeat for additional DUT(s). Page 147 © 2007 DH Instruments, a Fluke Company...
Page 164: Figure 105: Accumulation Sample Setup Window
The data file will remain open until a new data file is requested or the “Stop” icon is used to halt the run mode. © 2007 DH Instruments, a Fluke Company Page 148...
Page 165: Run Diagnostic Test
Set point errors are determined using the measured DUT set point whenever possible. If a measured value is not available, the nominal value is used as the set point. − × 100 DUTFS DUTspan − × 100 − × DUTFS DUTspan − × Page 149 © 2007 DH Instruments, a Fluke Company...
Page 166: Tolerance
AutoZero is used to correct the balance for drift over time. The procedure is to first measure the reference mass in the AMH-GFS2102 just after zeroing the balance and before starting a flow accumulation. This value and all ambient conditions are stored. At a later time during or after accumulation, the AMH is used to lower the reference mass again.
Page 167: Reference Cylinder Buoyancy
The balance output is not the cylinder mass when the cylinder is on the scale. In general use, the mass output on the balance must be added to the AutoZero Page 151 © 2007 DH Instruments, a Fluke Company...
Page 168 Density of the test gas at the nominal gas pressure and temperature (kg/ m ρ Density of the air at the current ambient pressure, temperature and humidity (kg/ m (P,T, H) © 2007 DH Instruments, a Fluke Company Page 152...
Page 169: Fully Compensated Mass
Time 0 is when the flow timer is turned on. Time n is at any instant in time The absolute measured time difference at any instant in time (s). Fully compensated gravimetric flow. Page 153 © 2007 DH Instruments, a Fluke Company...
Page 170: Average Flow
GFS. ∑ ∑ VARIABLE DEFINITION Best Fit flow. Mass used at the time of sample i. Elapsed time at the time of sample i. Best Fit Flow © 2007 DH Instruments, a Fluke Company Page 154...
Page 171: Integrated Mass
Determine the instantaneous flow tolerance relative to the target flow. Δ Δ Δ Δ − Δ • Determine the mass required to obtain a %Reading flow error E. Φ ε ε − Φ ν Φ Φ ν − Page 155 © 2007 DH Instruments, a Fluke Company...
Page 172 (data acquisition latency, clock drift, ect). ν Span based time uncertainty. All span based components of mass uncertainty should be combined to determine this span based value. © 2007 DH Instruments, a Fluke Company Page 156...
Page 173: Sample Rate
[System] <Balance RS232 Poll Interval>. The actual number of readings taken from the balance governs the true minimum time between samples. The [Setup][Configuration]<Min mass change per GFS sample> value. Nominal flow target (g/s). This is not the instantaneous flow value. Page 157 © 2007 DH Instruments, a Fluke Company...
Page 175: Summary
6. GENERAL MAINTENANCE, ADJUSTMENTS, AND STORAGE SUMMARY GFS2102 was designed for very low maintenance operation. However, certain regular maintenance functions are required to assure reliability and the best performance over time. These are summarized in Table 65, including cross-references to sections of this manual detailing each procedure.
Page 176: Reference Gas Cylinder Alignment
GFS Enclosure to the center of the screws and lock nuts that are in line with the regulator assembly are equal distance (approximately 11” or 27.94cm). © 2007 DH Instruments, a Fluke Company Page 160...
Page 177: Alignment Of The Reference Gas Cylinder
Great care should be taken so that the alignment process does not result in completely removing the cylinder carrier from the bottle. Should this occur, Section 6.6 details the reassembly of the carrier to the cylinder. Page 161 © 2007 DH Instruments, a Fluke Company...
Page 178: Preparing The Reference Gas Cylinder Assembly For Shipment Or Long Term Storage
Place the regulator assembly in the foam cut-out and insert into the fill/carry case so that the regulator stem points up and the open side of the foam cut-out faces away from the reference gas cylinder in the case. © 2007 DH Instruments, a Fluke Company Page 162...
Page 179: Reference Gas Cylinder Hydrostatic Testing
If the cylinder carrier has been removed from the Reference Gas Cylinder, either intentionally or by accident, it must be correctly reassembled and aligned to safely and properly continue to use the Page 163 © 2007 DH Instruments, a Fluke Company...
Page 180: Removing The Cylinder Carrier
Visually align the cylinder in the carrier, then perform an alignment per the instructions in Section 6.3, keeping in mind that the carrier is not yet fully secured to the cylinder. © 2007 DH Instruments, a Fluke Company Page 164...
Page 181: Check/Change Fluid In Heat Exchanger
Exchanger as in Section 3.3.14. RELEVEL SYSTEM SURFACES Generally if the bubble level on the AMH-GFS2102 still indicates level and there are no issues with system performance then no actions need be performed. Starting with the granite vibration isolation table, check/adjust the level of the surface as described in Section 3.3.1.
Page 183: Principles Of Gfs2102 Traceability Maintenance
7. MAINTENANCE OF TRACEABILITY AND RECALIBRATION PRINCIPLES OF GFS2102 TRACEABILITY MAINTENANCE The GFS2102 system is designed to provide state of the art measurement uncertainty specifications with a very high degree of confidence over time while minimizing maintenance requirements. The maintenance of traceability and associated recalibration of the GFS2102 system requires metrological maintenance procedures that are performed locally at regular intervals (see Sections 7.2 and...
Page 184: Laboratory Conditions Monitor (Lcm) Recalibration
To remove the reference mass for calibration, first remove the Reference Gas Cylinder and top plate from the AMH-GFS2102, then remove the Reference Mass plate with the attached Reference Mass. Reverse the steps in Section 3.3.9 to remove the Reference Mass from the plate.
Page 185: As Received Data Review
LCM TIME VERIFICATION OR ADJUSTMENT 7.5.3.1 PRINCIPLE LCM is used to read the GFS balance mass indication for use in GFS2102 mass flow measurements. For GFS flow measurement, it is critical that not only the mass measurement, but also the measurement of the time of each mass measurement, is made with a well defined uncertainty.
Page 186: Lcm Time Adjustment
Cycle the power on the LCM so the coefficient takes effect and/or to reset the LCM frequency to its default state. Repeat steps 2 thru 4 if necessary. Replace the top cover of the LCM. © 2007 DH Instruments, a Fluke Company Page 170...
Page 187: Ambient P, T, H Sensor Adjustment
Multipliers adjust sensor output as follows: Corrected Output = (Measured Output X Multiplier) + Adder Where: • Corrected output and measured output are in the current unit of measure of the sensor Page 171 © 2007 DH Instruments, a Fluke Company...
Page 188: Enclosure Pressure Sensor
The LCM default front panel display shows the output of the enclosure pressure sensor in its upper left corner on power up (see Figure 110). A one point verification against an atmospheric reference is all that is needed. © 2007 DH Instruments, a Fluke Company Page 172...
Page 189: Ambient Temperature Sensor
See Section 1.6 for recommended calibration procedure on the External PRT temperature sensor, which is used to measure temperature with much lower uncertainty. Page 173 © 2007 DH Instruments, a Fluke Company...
Page 190: Relative Humidity Sensor
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 in adjusting internal sensors. © 2007 DH Instruments, a Fluke Company Page 174...
Page 191: Th Probe Adjustment
Current relative humidity reading of the second probe, 38.99% 22.53°C TH Probe #3. Current temperature reading of the second probe, TH Probe #3. Figure 112: LCM TH probe front panel display Page 175 © 2007 DH Instruments, a Fluke Company...
Page 192: Th Probe Relative Humidity Sensor
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 in adjusting internal sensors. See Section 1.1 for TH probe sensor specifications. © 2007 DH Instruments, a Fluke Company Page 176...
Page 193: External Prt Temperature Adjustment
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, and the front display reading should reflect the newly applied calibration coefficients. See Section 1.1 for External PRT specifications. Page 177 © 2007 DH Instruments, a Fluke Company...
Page 194: Infrared (Ir) Cylinder Temperature Adjustment
IR sensor pointed at the body of the cylinder and the reference probe on or near the cylinder. When changing temperatures, a minimum of two hours of temperature stabilization after reaching the temperature setting should be allowed before taking a reading. © 2007 DH Instruments, a Fluke Company Page 178...
Page 195: Lcm Ohmic Measurement System Verification
Current Infrared Cylinder temperature reading in °C. 23.3123 Figure 115. LCM IR probe front panel display Figure 116. IR Probe adjustment tab 7.5.8 LCM OHMIC MEASUREMENT SYSTEM VERIFICATION PURPOSE To verify the LCM ohmic measurement system. PRINCIPAL Page 179 © 2007 DH Instruments, a Fluke Company...
Page 196 The LCM includes an ohmic measurement system used to measure the resistance of the two Platinum Resistance Thermometers (PRTs), one inside and one external to the AMH-GFS2102. The temperature of the PRTs is calculated from the resistance. The PRTs have nominal resistance at 0°C of 100 ohm and a slope of 0.3896 following DIN Norm 43760.
Page 197: Standard Resistor Measurement And Adjustment
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. Page 181 © 2007 DH Instruments, a Fluke Company...
Page 198: Lcm Remote Command For Automation
For time calibration or verification, the time does not need to be reset to be used effectively. Simply use: Elapsed Time (seconds) = Time reading (End) – Time reading (Start) / 1000 © 2007 DH Instruments, a Fluke Company Page 182...
Page 199: Molbox Recalibration
The balance zero and span is performed semi-automatically by GFS Tools using the AMH- GFS2102 zero load and Reference Mass load positions, then calculates and applies a mass span multiplier seen on the [TIME/MASS] tab in Section 5.5.7.1. Manual span verification with the GFS mass carrier MS- 2102-CAR is performed by replacing the Reference Gas Cylinder with the mass carrier and operating the AMH to raise and lower the carrier while adding or removing calibrated weights.
Page 200: Verification By Mass Carrier
When switching back to the Reference Gas Cylinder from the mass carrier, refer to the sections noted in step if re-alignment of the AMH is required for proper operation with the Reference Gas Cylinder. © 2007 DH Instruments, a Fluke Company Page 184...
Page 201: T R O U B L E S H O O T I N
MFC-CB, setpoints below lower limits volts or 4mA. may be insufficient to activate the MFC valve. Manual valve in flow path is closed. Check to ensure all valves in the flow path are open. Page 185 © 2007 DH Instruments, a Fluke Company...
Page 202 AMH. One or more of the LCM probes has lost Abort the test. Check all LCM probe communication with the LCM. connections and cycle power on the LCM. © 2007 DH Instruments, a Fluke Company Page 186...
Page 203: Glossary
The temperature at which air cannot hold all of the moisture in it and condensation begins to form. Reference Mass The nominally 2.0 kg calibrated mass ring supported by a plate of the AMH-GFS2102 that is used for the AutoZero and balance span functions.
Page 204: Typical Test Setups
GFS2102™ OPERATION AND MAINTENANCE MANUAL TYPICAL TEST SETUPS © 2007 DH Instruments, a Fluke Company Page 188...
Page 205: Warranty Statement
9. APPENDIX WARRANTY STATEMENT Except to the extent limited or otherwise provided herein, DH Instruments, a Fluke Company (DHI) warrants for one year from purchase, each new product sold by it or one of its authorized distributors, only against defects in workmanship and/or materials under normal service and use. Products which have been changed or altered in any manner from their original design, or which are improperly or defectively installed, serviced or used are not covered by this warranty.

DH Instruments GFS2102 Operation And Maintenance Manual

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A B O U T T H I S M a N U al

1 Introduction

2 S y S T E M O V E R V I Ew

1 I N S T a L L a T I O

4 O P E R a T I O

5 G F S T O O L S S O F T W a R

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