RPM4/HPMS A70M/A20M-AF™ Reference Pressure Monitor with High Pressure Mounting System Operation and Maintenance Manual NSN 6685-01-529-6990 RN (2 of 3) © 2007 DH Instruments, a Fluke Company
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases can be released unexpectedly and with extreme force. High pressure systems should be assembled and operated only by personnel who have been instructed in proper safety practices. This instrument is not to be operated in any other manner than that specified by the manufacturer. © 2007 DH Instruments, a Fluke Company All rights reserved.
TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS ...............................................................I TABLES .................................................................................. V FIGURES................................................................................ VI ABOUT THIS MANUAL ............................................................ VII 1. INTRODUCTION ................................................................. 1 1.1 1.2 PRODUCT OVERVIEW ...............
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 3.2 GENERAL OPERATING PRINCIPLES .................................................................................................18 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3.2.6 3.3 DIRECT FUNCTION KEYS....................................................................................................................24 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.3.6 3.3.6.1 3.3.6.2 3.3.6.3 3.3.6.4 3.3.6.5 3.3.6.6 3.3.6.7 3.3.7 3.3.8 3.3.9 3.3.9.1 3.3.9.2 3.3.10 3.3.10.
TABLE OF CONTENTS 4. REMOTE OPERATION ....................................................... 73 4.1 4.2 OVERVIEW ............................................................................................................................................73 INTERFACING.......................................................................................................................................73 4.2.1 4.2.1.1 4.2.1.2 4.2.1.3 4.3 PROGRAMMING FORMATS................................................
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 6. TROUBLESHOOTING .......................................................129 7. APPENDIX ......................................................................133 7.1 UNIT CONVERSION ............................................................................................................................133 7.1.1 8. WARRANTY ....................................................................135 8.1 9. PRESSURE..............................
TABLES & FIGURES TABLES Table 1. RPM4/HPMS A70M/A20M-AF Parts List....................................................................................... 6 Table 2. Settings and what they are specific to (range, measurement mode, Q-RPT, system)................ 20 Table 3. Summary of RPM4 function key operation .................................................................................. 24 Table 4. Settings made by AutoRange .............................................................................
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL FIGURES Figure 1. Typical PGC-10000-AF installation layout.................................................................................... 7 Figure 2. RPM4/HPMS front view ................................................................................................................ 8 Figure 3. RPM4/HPMS rear view................................................................................................................. 9 Figure 4.
ABOUT THIS MANUAL ABOUT THIS MANUAL This manual is intended to provide the user with the basic information necessary to operate an RPM4/HPMS A70M/A20M reference pressure monitor with high pressure mounting system. It also includes a great deal of additional information provided to allow you to optimize the use of the instrument and take full advantage of its many features and functions.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL NOTES © 2007 DH Instruments, a Fluke Company Page VIII
1. INTRODUCTION 1. INTRODUCTION 1.1 PRODUCT OVERVIEW RPM4/HPMS A70M/A20M-AF is the combination of an RPM4 A70M/A20M-AF reference pressure monitor and an HPMS High Pressure Mounting System. RPM4 A70M/A20M-AF is a stand-alone, microprocessor driven, reference pressure monitor intended to accurately measure gas pressure in a variety of pressure calibration, measurement and testing applications.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 1.2 SPECIFICATIONS 1.2.1 GENERAL SPECIFICATIONS Power Requirements: Operating Temperature Range: Storage Temperature Range: Weight: Dimensions: Communication Ports Fuses: Pressure Range: 85 to 264 VAC, 50/60 Hz, 25 VA max consumption and 12VDC, 1.2 A 18 to 28 °C - 20 to 70 °C 11 kg (22 lb) approx. 23.5 cm H x 29.4 cm W x 37.5 cm D (9.3 in. x 11.6 in. x 14.8 in.) RS232 (COM1, COM2), IEEE-488.
1. INTRODUCTION 1.2.2 PRESSURE MEASUREMENT SPECIFICATIONS 1.2.2.1 QUARTZ REFERENCE PRESSURE TRANSDUCERS (Q-RPT) RPM4 A70M/A20M is configured with two quartz reference pressure transducers (Q-RPT) modules to measure pressure. The Q-RPTs can measure absolute and gauge pressure. Gauge pressure is defined by offsetting atmospheric pressure and applying dynamic compensation for atmospheric changes using the on-board barometer (see Section 3.2.2).
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL NOTES © 2007 DH Instruments, a Fluke Company Page 4
2. INSTALLATION 2. INSTALLATION 2.1 UNPACKING AND INSPECTION RPM4/HPMS A70M/A20M-AF is usually delivered as part of an PGC-10000-AF system which includes a GPC1-10000-AF gas pressure controller and a GB-152-AF gas booster. 2.1.1 REMOVING FROM PACKAGING RPM4/HPMS A70M/A20M-AF is delivered, along with its accessories, in a reusable molded plastic, shipping container with polyurethane inserts to hold it in place.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 2.1.2 INSPECTING CONTENTS Check that all items are present and have no visible damage. If damage is noted, report it to your Receiving Department for appropriate action. A new RPM4/HPMS A70M/A20M-AF includes all items listed in Table 1. Table 1. RPM4/HPMS A70M/A20M-AF Parts List DESCRIPTION RPM4/HPMS A70M/A20M-AF Reference Pressure Monitor/High Pressure Mounting System PART NO. 402192 ACCESSORIES: 1 ea.
2. INSTALLATION Each of the three components of the PGC-10000-AF system has its own Operation and Maintenance Manual and individual setup and start up instructions. Figure 1 shows the typical setup configuration of a complete PGC-10000-AF system. RPM4/HPMS A70M/A20M Reference Pressure Monitor GPC1-10000-AF Gas Pressure Controller CAUTION GB152-AF GB152 Setting Drive Air Control Kit GB152-AF GB152 Pressure Gas Generation Component Booster Remote ENTER Footswitch Figure 1.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 2.4 SETUP 2.4.1 PREPARING FOR OPERATION To prepare RPM4 for check out and operation: Remove the plastic plug from the RPM4/HPMS rear panel TEST connection. Remove the protective plastic sheet from the front panel display. Familiarize yourself briefly with the RPM4 and HPMS front and rear panels (see Sections 2.4.2, 2.4.3). 2.4.2 RPM4/HPMS FRONT, REAR AND SIDE VIEWS 2.4.2.1 RPM4/HPMS FRONT VIEW 1. RPM4 A70M/A20M-AF Reference Pressure Monitor 2.
2. INSTALLATION 2.4.2.2 1. RPM4/HPMS REAR VIEW Foot switch (remote [ENT]) cable connector 2. TEST port (DH500 F) Figure 3.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 2.4.2.3 RPM4/HPMS SIDE VIEW 1. Lo Q-RPT shut off valve 2. RPM4/HPMS A70M/A20M Reference Pressure Monitor 3. Pressure relief valve (3 300 psi) 4. Foot switch (remote [ENT]) cable connector 5. TEST port (DH500 F) Figure 4. RPM4/HPMS side view 2.4.3 RPM4 FRONT AND REAR PANELS 2.4.3.1 RPM4 FRONT PANEL 1. Ready/Not Ready indicator 2. Display 3. Remote activity indicator 4. Cursor control keys 5. Multi-function keypad Figure 5.
2. INSTALLATION 2.4.3.2 RPM4 REAR PANEL 1. 12VDC Power Supply Connection 2. Accessories connector (to HPMS rear panel FOOTSWITCH and LEDs) 3. IEEE-488 Connector 4. COM2 Connector 5. COM1 Connector 6. Power Switch 7. Fuse 8. 9. 10. 11. 12. 13. 14. Electrical Power Connector (IEC-320-C13) Fan TEST(+) Pressure Port, Lo Q-RPT TEST(+) Pressure Port, Hi Q-RPT ATM Pressure Port, Lo Q-RPT ATM Pressure Port, Hi Q-RPT Product Label (bottom of case) Figure 6. RPM4 rear panel 2.4.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL USE THE CORRECT PRESSURE CONNECTORS: The RPM4/HPMS TEST port fitting is a DH500 F (see Section 1.2.1). It is NOT a 1/8 in. NPT F. Never use a fitting other than the corresponding male fitting in these connectors. Damage to the connectors and dangerous failure under pressure could result from using incorrect fittings.
2. INSTALLATION 2.5 POWER-UP AND VERIFICATION 2.5.1 SWITCH POWER ON Actuate the power switch on the RPM4 rear panel. Observe the front panel display as RPM4 initializes, error checks and goes to the MAIN RUN screen (see Section 3.1.1). If the RPM4 fails to reach the main run screen, service is required. Record the sequence of operations and displays observed and contact a DHI Authorized Service Provider (see Section 8, Table 23).
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL It is normal for RPM4 to indicate a value other than zero when vented when gauge mode is first entered or ranges are changed, especially if AutoZ is OFF, RPM4 has been OFF for some time or its location has changed. 2.6 SHORT TERM STORAGE The following is recommended for short term storage of RPM4/HPMS: • Vent the RPM4/HPMS TEST port. • Switch the RPM4 power OFF. 2.
3. OPERATION 3. OPERATION 3.1 USER INTERFACE RPM4/HPMS is designed to offer the optimum balance between simple, straight forward operation and the availability of a wide variety of functions with a high level of operator discretion if desired. The local operator interface is through the RPM4 front panel 2 x 20 character alpha-numeric display, a function/data keypad, a cursor control pad, an [ENTER] footswitch and a Ready/Not Ready indicator.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL P R ES S URE 1 U NI T M h z R R D D I SP L AYF U C NI O Nnn / n n DISPLAY FIELD NAME PURPOSE CONTENTS 1. PRESSURE1 Measured pressure Displays pressure measured by the active Q-RPT Numerical pressure value and sign. 1.2.2.1, 3.3.1 2. UNIT Unit of measure Identifies unit of measure in which pressure values are displayed Pressure unit symbol 3.3.2 3.
3. OPERATION 3.1.2 FUNCTION / DATA KEYPAD LAYOUT AND PROTOCOL The RPM4 has a function/data keypad for local operator access to direct functions, function menus and for data entry. 1. The Function/Data keys allow very commonly used functions to be accessed directly by a single keystroke when pressed from the MAIN RUN screen (see Section 3.1.1). The name of the function is on the bottom half of the key. These keys enter numerical values when editing. 2.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 3.1.3 REMOTE [ENT] (ENTER) FOOTSWITCH Operating the footswitch is the equivalent of pressing [ENT] on the front panel. The remote ENTER feature can be particularly convenient when running AutoTests (see Section 3.3.10) in which the operator’s hands are not free or attention is on the device under test rather than the RPM4. 3.1.4 SOUNDS RPM4 is equipped with a variable frequency tone device to provide audible feedback and alarms.
3. OPERATION 3.2.2 GAUGE MODE, DYNAMIC COMPENSATION FOR ATMOSPHERIC PRESSURE The RPM4 A70M/A20M-AF Q-RPTs are intrinsically absolute but they are also used for gauge measurement mode (see Section 3.3.3, PRINCIPLE). Gauge measurement mode is achieved by subtracting the value of atmospheric pressure, Poffset,G, from the Q-RPT’s absolute reading using AutoZ (see Section 3.2.2). The AutoZ routine that measures Poffset,G, is run by pressing [AutoZ] whenever RPM4 is in the vented condition.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL The ranges available on the RPM4 are accessed using [RANGE] (see Section 3.3.1) and/or created using [AutoRange] (see Section 3.3.4). Most settings made in an RPM4 range, such as unit of measure, measurement mode, display resolution, and stability setting are specific to the range. Settings selected while one range is active apply to that range and not to other ranges.
3. OPERATION The Lo Q-RPT isolation valve (3) isolates and protects the Lo Q-RPT from the TEST port when it is closed (knob fully CCW) and opens the Lo Q-RPT to the TEST port when it is open (knob fully CW). The Valve Position LEDs (2, 4) indicate the position in which the valve knob should be set based on the current Q-RPT selection on the RPM4.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 1. RPM4 A70M/A20M-AF Reference Pressure Monitor 2. Lo Q-RPT shut-off valve position LED 3. Lo Q-RPT shut-off valve 4. Lo Q-RPT active valve position LED 5. Lo Q-RPT active caution LED Figure 9.
3. OPERATION 1. HPMS TEST port (DH500 F) 2. Connection to RPM4 Lo Q-RPT (A20M) (3 000 psi) 3. Lo Q-RPT pressure relief valve (3 300 psi) 4. Lo Q-RPT shut off valve 5. RPM4 A70M/A20M-AF Reference Pressure Monitor 6. Connection to RPM4 Hi Q-RPT (A70M) (10 000 psi) Figure 10.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 3.2.6 DIRECT FUNCTION KEYS SUMMARY Table 3 provides a brief summary of RPM4 direct function key operation. It may be useful to keep a copy of this summary near the RPM4/HPMS, especially when first becoming acquainted with its operation. Local operation of RPM4 is through the front panel keypad. To minimize multi-layered menu structures, the keypad numerical keys also provide direct access to the most commonly used functions.
3. OPERATION Ranges created using AutoRange or AutoTest may be saved, with their settings, for reactivation (see Section 3.4.1). The [RANGE] function key allows the available RPM4 pressure ranges to be viewed and selected. OPERATION Pressing the [RANGE] function key activates the range viewing and selecting function. When the [RANGE] function key is first pressed, the active range is displayed. For example: 1. Q-RPT designator. 2. Type of range.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 3.3.2 [UNIT] PURPOSE To select the unit of measure in which RPM4 displays pressure values. To select the measurement mode (absolute, gauge), use [MODE] (see Section 3.3.3). PRINCIPLE RPM4 allows the unit of measure in which pressure values are displayed to be changed. RPM4 A70M/A20M-AF supports 13 standard pressure units of measure as well as user defined units.
3. OPERATION 3.3.3 [MODE] PURPOSE To set the measurement mode (absolute, gauge) for the active range. To select the unit of measure, use [UNIT] (see Section 3.3.2). PRINCIPLE RPM4 A70M/A20M-AF supports simple, one-step switching between two measurement modes: Absolute Measures pressure relative to vacuum (zero is hard vacuum). Range is from zero absolute to full scale. Gauge Measures pressure relative to atmosphere (zero is ambient pressure).
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL PRINCIPLE RPM4 A70M/A20M-AF is designed to support the calibration and test of a very wide variety of test ranges in absolute and gauge measurement modes. The AutoRange function simplifies the task of selecting the Q-RPT best suited to cover a specific test range and setting measurement parameters appropriately for that specific range.
3. OPERATION OPERATION To use the AutoRange function, press [AutoRange] and respond to the RPM4’s prompts. Select AutoRange measurement mode: The screen is identical in appearance and function to the [MODE] screen (see Section 3.3.3). Select pressure unit of measure: The screen is identical in appearance and function to the [UNIT] screen (see Section 3.3.2). Enter the AutoRange full scale pressure: Enter the full scale pressure value in the <------> entry field and press [ENT].
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL The principle of the LEAK CHECK function is the measurement of the natural decrease or increase of pressure in a fixed volume over time. The LEAK CHECK function allows a leak check time to be set. The total pressure change and the average rate of change over the leak check time are calculated and displayed. OPERATION To run a leak check, first set the pressure to the desired leak check pressure.
3. OPERATION Leak check is range specific in the sense that a leak check is run using the active range. However, only one set of leak check results is maintained in memory and each leak test completed overwrites the memory. View leak check always shows the results of the last leak check run regardless of the range that is now active. The results screen includes the range indicator to indicate the range in which the leak check was run. 3.3.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL OPERATION To set the DISPLAY function press [DISPLAY] from the main run screen. 1avg 2rate 3dev 4RPT 5HiLo 6freeze 7clean The display is: The cursor is on the active DISPLAY function. Selecting a DISPLAY function returns to the main run screen with the selected function active. See Sections 3.3.6.1 to 3.3.6.7 for information on each of the DISPLAY choices. The DISPLAY selection is NOT range specific.
3. OPERATION The Average DISPLAY has a second screen that allows the instantaneous pressure readings to be viewed while an averaging cycle is running. The instantaneous Average screen is: 1. Instantaneous pressure values at RPM4’s normal update rate. 2. Current rate of change of pressure in active pressure unit/second. 3. Countdown in seconds until completion of ongoing averaging period. 3001.51 psi a Hi R 0.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL OPERATION To activate the Rate DISPLAY press [DISPLAY], <2Rate>. Pressing <2Rate> returns to the main run screen with the Rate DISPLAY active. With the Rate DISPLAY active the main run screen is: 1. Current rate of change of pressure in current pressure unit per second. 8455.25 psi a R 0.
3. OPERATION With the Deviation DISPLAY active the main run screen is: 1. Deviation of current pressure from the target value. 2. Target value. 8998.2 D -1.8 psi a zH3 T9000.0 Pressing [ENT] from the main run screen when the Deviation DISPLAY is active goes directly to the Target editing screen. This allows the target value to be changed and without going through the DISPLAY menu.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL With the RPT DISPLAY active the main run screen is: 1. Active Q-RPT display. 2. Inactive Q-RPT display with Ready/Not Ready indicator on far left (<*> indicates Ready). 2010.66 psi a *14.27 psi g zHi zLo When the RPT display is active, executing a range change to a range on the inactive Q-RPT makes the inactive Q-RPT the active Q-RPT. The DISPLAY defaults back to Rate ( Section 3.3.6.2).
3. OPERATION 3.3.6.6 Freeze PURPOSE To activate the Freeze DISPLAY. See Section 3.3.6, Principle. OPERATION To activate the Freeze DISPLAY press [DISPLAY], <6Freeze>. Pressing <6Freeze> returns to the main run screen with the Freeze DISPLAY active. With the Freeze DISPLAY active the main run screen is: 1. Pressure measured by active range of RPM4 when [ENT] was pressed (displays 0.00 by default when Freeze DISPLAY is first activated). 4435.6 psi a F 4420.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 3.3.7 [HEAD] PURPOSE To cause a pressure fluid head correction to be added to or subtracted from the pressure measured by the RPM4 reference pressure transducer in order to predict the pressure at a height other than the RPM4/HPMS’s reference level. PRINCIPLE RPM4/HPMS measures gauge or absolute pressure at the height of the rear panel TEST port.
3. OPERATION When a head correction is being applied, it is indicated by in the fourth character from the right in the top line of the MAIN RUN screen (see Section 3.1.1). When the head correction is zero, the is not shown. The default head height unit is inches and the fluid species is Nitrogen (N2).To change units of head height between inches and centimeters and to change the test fluid species, use [SPECIAL], <3head> (see Section 3.5.3). 3.3.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL Before running AutoZ in gauge mode, ensure that the pressure applied to the Q-RPT is truly zero gauge (atmospheric pressure). If running AutoZ in gauge mode results in a zero offset that RPM4 considers unusually large, is displayed. Check that zero gauge pressure is applied to the Q-RPT module rear panel TEST(+) port and the ATM port is open to atmosphere and unobstructed.
3. OPERATION If running AutoZ results in a value of Poffset that is greater than ± 0.005 % FS of the span of the Q-RPT that is being AutoZeroed, the Q-RPT and/or the reference used as the source of Pstd,0 may be out of tolerance or the AutoZ process may have been faulty. Before activating a new Poffset greater than ± 0.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL Run AutoZ by COM2 AutoZ by COM2 allows the value of Pstd,0 (see Section 3.5.1 Principle) to be read automatically from a DHI RPMx connected to the RPM4 COM2 communications port. The RPMx is read and the new Poffset is calculated automatically. To access run AutoZ by COM2 press [AutoZ], <2COM2>. The display is: 1. Real time pressure reading (without head correction), pressure unit of measure and measurement mode of the active Q-RPT. 2.
3. OPERATION 3.3.10 [ENT] (RUN AUTOTEST) PURPOSE To run the AutoTest function which runs a calibration test sequence (Quick Test or File Test). Run AutoTest is accessed by pressing [ENT] from the Rate or Clean DISPLAY mode (see Section 3.3.6). In other DISPLAY modes, the function of [ENT] is specific to the mode. PRINCIPLE RPM4 supports AutoTest automated sequences to assist in the testing or calibration of analog gauges and other pressure sensitive devices.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL • Stability test for Ready/Not Ready indication(see Section 3.2.1): The DUT tolerance divided by 10, or 2 ppm of Q-RPT span, whichever is greater. • Upper limit (UL): The DUT full scale plus 5 %, or the Q-RPT’s maximum UL, whichever is less (see Section 3.4.4). To AutoRange the RPM4 based on DUT characteristics but not execute an AutoTest, the AutoTest can be aborted just after the initialization.
3. OPERATION • : Enter the DUT measurement uncertainty, accuracy or precision specification as desired in ± % FS (percent of full scale). This value will be used to determine appropriate RPM4 resolution and stability test settings. • : Enter the test increment in % FS of the DUT. When executing the test, the test increments will be from zero to the DUT full scale, dividing by the value of the increment.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 0.0 psi g Lo Exercise DUT & [ENT] The display is: The top line is the standard RPM4 run screen indicating the current measured pressure (see Section 3.1.1). Exercise the DUT if desired using the top line indication of the measured pressure and press [ENT] when complete.The display is: 1. Standard RPM4 run screen indicating current measured pressure. 2. Number of this test point/the total number of test points in the sequence. 3.
3. OPERATION 3.4 [SETUP] PURPOSE [SETUP] accesses a menu of functions and features commonly used in setting up and using RPM4. OPERATION 1range 2res 3stab 4UL 5ATest To access the SETUP menu, press [SETUP] from the MAIN RUN screen. The display is: SETUP menu choices include: <1range> Save and delete ranges created by AutoRange (see Section 3.4.1). <2res> Adjust the resolution of pressure displays (see Section 3.4.2).
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL Press [ENT] to save the range or [ESC] to return to the MAIN RUN screen without saving the range. Default () Q-RPT ranges cannot be saved. They are permanent. Duplicate AutoRange ranges cannot be saved. A duplicate AutoRange range is a range that has the same measurement mode and full scale and uses the same QRPT as a range that has already been saved. 3.4.1.
3. OPERATION OPERATION To access the resolution function, press [SETUP], <2res>. The display is: Display resltn: Hi 0.0010 %FS < and > Use the cursor control keys to set the desired level of resolution. Press [ENT] to return to the MAIN RUN screen with the new resolution setting active or [ESC] to make no changes. The resolution setting is range specific. A resolution setting made in one range does NOT affect other ranges.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 3.4.4 <4UL> (UPPER LIMIT) PURPOSE To set the upper pressure limit value for a pressure range and measurement mode. PRINCIPLE The UPPER LIMIT function provides the user with a settable pressure limit at which an alarm sounds. When the limit is reached, RPM4’s beeper sounds intermittently as long as pressure is above the limit. The UPPER LIMIT function has two purposes.
3. OPERATION The over pressure function causes the measured pressure display to flash. The overpressure function also logs the time and date of the overpressure condition in both user and factory logs to assist in incident diagnosis (see Section 3.5.7.5). To recover from an overpressure condition, cycle RPM4 power. Before cycling power, be sure to correct the condition that caused the overpressure. 3.4.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 1. Full scale of the AutoTest with pressure unit of measure and measurement mode. 2. Number of test points executed/total number of points in the AutoTest. 3. Date and time that the last point in the AutoTest was executed. 6000 psig 6/6 20050922 10:51:01 am Press [+/-] or [→] to scroll through the headers of the other AutoTest data files available.
3. OPERATION A File AutoTest definition file defines: • The identifying number of the File AutoTest definition file. • Pressure measurement mode (gauge or absolute). • Pressure unit of measure. • DUT full scale in pressure unit of measure and measurement mode. • DUT tolerance (% FS). • Number of test points or pressure targets to include in the AutoTest. • Numerical value of each test point or pressure target. See Section 3.3.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL Enter the tolerance in % of full scale (measurement uncertainty, precision or accuracy as desired) of the DUT to be calibrated using this File AutoTest. The value entered will be used along with the DUT full scale to determine RPM4 AutoRange settings when the AutoTest is run (see Section 3.3.10, PRINCIPLE). The display is: Number of targets: 1 File1 Enter the total number of pressure points or target pressures to be included in the AutoTest.
3. OPERATION <7intern> <8cal> <9reset> Access internal functions including on-board barometer viewing, read rate adjustment, incident log viewing (see Section 3.5.7). View and adjust RPM4 Q-RPT and barometer calibration coefficients (see Sections 3.5.8, 5.2, 5.3). Access RPM4’s various reset functions (see Section 3.5.9). 3.5.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL being AutoZeroed. Given the high pressure range of the RPM4 Q-RPTs, adequate uncertainty is easily available from a variety of digital barometers or, for the Hi Q-RPT, by the Lo Q-RPT. In absolute measurement mode, with AutoZ ON, absolute pressure is calculated as: Pabs = Pu - Poffset,A In absolute measurement mode, running the AutoZ function to update the AutoZ value (Poffset,A), is initiated by the operator using [AutoZ] (see Section 3.3.9.1).
3. OPERATION Recommendations for the Use of the AutoZ Function The AutoZ function provides a powerful and easy to use tool for improving the stability over time of RPM4 Q-RPTs and maximizing the recalibration interval by compensating for zero drift between full recalibrations. The following simple recommendations will help assure that you use this feature to best advantage. • In gauge mode: Always leave AutoZ ON. Use [AutoZ] to run AutoZ whenever RPM4 is vented and displays a significantly non-zero value.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 3.5.1.1 EDIT AUTOZ The edit AutoZ function should be used only with great care as entering inappropriate values may result in out of tolerance measurements. In normal operation, the value of the AutoZ offset, Poffset, should be changed by running AutoZ using [AutoZ] (seen Section 3.3.9). Before editing Poffset, see Section 3.5.1, PRINCIPLE.
3. OPERATION 3.5.2.1 <1COM1, 2COM2> The COMx ports can be set for specific communications settings. The settings are baud rate, parity, data bits and stop bits. The available options are: Baud 300, 600, 1 200, 2 400, 4 800, 9 600, 19 200, 28 800, 38 400 Parity NONE, ODD or EVEN Length 7 or 8 Stop Bit 1 or 2 The default is <2 400, E, 7,1> for both COM1 and COM2. The user can also specify one or two termination characters, referred to as “Term1” and “Term2”, as well as define these characters.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL The display prompts you to connect COM1 to COM2 using a standard pin-to-pin DB-9F to DB-9M RS232 cable (see Section 4.2.1.1, 4.2.1.3). Once the cable has been installed, press [ENT] to run the self-test. The test is first executed in the COM1→COM2 direction and then in the COM2→COM1 direction. If the COM1→COM2 test passes: displays briefly and the test proceeds to COM2→COM1.
3. OPERATION To access the PREFS menu press [SPECIAL], <5prefs>. The display is: 1ScrSvr 2sound 3time 4ID 5level The PREFS menu includes: <1ScrSvr> View and change the screen saver activation time (see Section 3.5.5.1). <2sound> View and change the key press sounds (see Section 3.5.5.2). <3time> View and edit the internal time and date settings (see Section 3.5.5.3). <4ID> View the RPM4 serial number (SN) and view or edit the ID number (see Section 3.5.5.4).
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL The sound function only affects the valid key press tone. The invalid key press tone and other RPM4 sounds cannot be adjusted or suppressed. 3.5.5.3 <3TIME> PURPOSE To view and edit the RPM4 internal time and date settings. OPERATION To access the TIME function press [SPECIAL], <5prefs>, <3time>. The display is: Edit: 1time 2date 08:32:11 am 20030125 Select <1time> to edit the time.
3. OPERATION 3.5.5.5 <5LEVEL> (SECURITY) PURPOSE To set user protection levels to restrict access to certain functions and to edit the password required for changing user levels. PRINCIPLE RPM4’s front panel user interface provides the means to access all RPM4 user defined data, settings and functions including calibration data.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL The security levels are structured to support typical levels of operation as shown in Table 6. Specifically, the security levels prevent execution of the functions accessed by the key strokes marked by “•”: Table 6.
3. OPERATION OPERATION RPM4 is delivered with no active password and access to the User Level menu is open. The user level is set to <1Low>. User levels can be changed freely until a password has been created. To access the LEVEL function press [SPECIAL], <5prefs>, <5level>. The display is: 1change user level 2edit password Selecting <1change user level> brings up the restriction menu: Restrictions: 1none 2low 3medium 4high The cursor is on the current restriction level.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL customizes the [UNIT] function key to support his/her most commonly used units. Up to six units can be included in the [UNIT] screen. OPERATION To customize the [UNIT] function key, press [SPECIAL], <6PresU> from the MAIN RUN screen. The display is: 1. Entry field to specify which unit position (1 to 6) of the [UNIT] function key menu is to be changed.
3. OPERATION The INTERNAL menu choices include: <1baro> View the real time output of the RPM4 on-board barometer (see Section 3.5.7.1). <2ReadRt> Turn ON and OFF RPM4’s automated, rate of change dependent, reading and integration and display rate feature (see Section 3.5.7.2). <3RPT2x> Feature not used in this RPM4 model. <4lo vnt> Feature not used in this RPM4 model. <5log> View the RPM4 incident log (see Section 3.5.7.5). 3.5.7.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL When the automated read rate function is ON, three pressure rate of change dependent read rates are used. The result is three display update rates: Table 8. READRT - display update rates PRESSURE RATE OF CHANGE DISPLAY UPDATE > 3 % of range span/s ≈ 0.2 s > 0.5 and < 3 % of range span/s ≈ 0.6 s < 0.5 % of range span/s ≈ 1.
3. OPERATION OPERATION To view the event log press [SPECIAL], <7internal>, <5log>. The oldest logged event appears. Pressing [ENT] steps through the logged events from the oldest to the most recent and ending with the option to clear the log, <1no>, <2yes>. The log clear choice is not available in all security levels (see Section 3.5.5.5, Table 6). When all events have been viewed, displays. 3.5.8 <8CAL> PURPOSE To calibrate the RPM4 Hi and Lo Q-RPTs and adjust the on-board barometer.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL Table 9. Reset – Sets RESET RESULT SEE SECTION [UNIT] Pressure unit of measure to first of the six available (psi) 3.3.2 [MODE] Measurement mode to the native mode of the Q-RPT (absolute) 3.3.3 [RANGE] Hi Q-RPT default range (10000 psi) 3.3.1 [HEAD] 0 cm height and Nitrogen medium 3.3.7 Stability Limit 0.005 % of Hi Q-RPT default range 3.4.3 Upper Limit Hi Q-RPT default range default value 3.4.4 Resolution 0.
3. OPERATION 3.5.9.4 <4 CAL> PURPOSE The Reset - Cal function will reset the Q-RPT and barometer calibration coefficients and reset AutoZ values to zero. This will change the RPM4 calibration and could cause it to make out of tolerance measurements. Clears all user values affecting the calibration of Q-RPTs and the on-board barometer. The Reset – Cal resets are itemized in Table 10. Table 10. Reset – Cal RESET RESULT SEE SECTION All Q-RPT calibration coefficients PA to zero, PM to 1 5.3.
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4. REMOTE OPERATION 4. REMOTE OPERATION 4.1 OVERVIEW Most of the RPM4 front panel functions can also be executed by commands from a remote computer. The host computer can communicate to the RPM4 using the RPM4’s COM1 RS232 port or it’s IEEE-488 port. Before writing code using RPM4 remote commands, familiarize yourself with its operating principles by reviewing Section 3 of this manual. 4.2 INTERFACING Sending a program message to the RPM4 places it into remote mode.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 4.2.1.2 IEEE-488 The RPM4 IEEE-488 interface is located on the back of the unit. The physical and electrical interface conforms to IEEE Std 488.1-1987 Subset E2 and IEEE Std. 488.2-1992. You should not attempt to communicate with the IEEE-488 interface while using the COM1 interface. The IEEE-488 receive buffer is 250 bytes deep.
4. REMOTE OPERATION 4.3.1 CLASSIC PROGRAM MESSAGE FORMAT Each program message sent is also a query. You can only send one program message to the RPM4 at time. After sending any program message, you must wait for the RPM4 to reply before sending another program message. This reply will contain data, or a numeric error message if the program message was invalid. You must wait for this reply before issuing another program message to the RPM4. This insures that the RPM4 has completed the program message.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL Examples: • IEEE-488 enhanced mode command series using query operator: “*CLS?” “UNIT? KPA” “MMODE? A” “PR?” • IEEE-488 enhanced mode commands without query operator: “*CLS” “UNIT KPA” “MMODE A” “ERR?” • (Clear the error queue. Wait for reply) (Generates a reply. User must wait for reply before continuing) (Generates a reply. User must wait for reply before continuing) (Generates a reply.
4. REMOTE OPERATION 4.4 COMMANDS 4.4.1 PROGRAMMING MESSAGES Some commands accept an optional suffix. This suffix can be used to specify the explicit Q-RPT to address. In most cases, each Q-RPT in the RPM4 operates as an independent measurement device. If the suffix is not specified, then the “Active” Q-RPT is assumed. The “RANGE” or “ARANGE” command can be used to select the “Active” Q-RPT. See the program message descriptions for suffix use with a specific command. Table 14.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 4.4.2 ERROR MESSAGESS Table 15.
4. REMOTE OPERATION 4.4.3 PROGRAM MESSAGE DESCRIPTION OVERVIEW Each program message description is separated into the following sections: Purpose Command Query Classic Suffix Arguments Default Remarks Example Errors See Also A brief description of the programs message’s function. This is the Enhanced program message syntax to send data to the RPM4 or to execute an RPM4 function. The RPM4 must be set to use the enhanced format (see Section 3.5.2.3) to use the syntax and style shown.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 4.4.4 # Purpose Classic Arguments Remarks Example (classic) See Also ABORT Purpose Command Classic Remarks Example (enhanced) Example (classic) See Also PROGRAM MESSAGE DESCRIPTIONS To allow the host PC to communicate with a device connected to the RPM4 COM2 port. “#xx” The string to send out of the RPM4 COM2 port. It must be less than xx: 40 characters long.
4. REMOTE OPERATION ARANGEn Purpose Command Query Classic Query Optional Suffix Arguments Remarks Example (enhanced) Example (classic) Example (enhanced) Example (classic) Example (enhanced) Example (enhanced) Errors See Also ATM Purpose Query Classic Remarks Example (enhanced) Example (classic) Errors See Also Read or set a new AutoRange range to use.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL AUTOZEROn Purpose Command Query Classic Read or set the status of the AutoZ function. “AUTOZEROn state” “AUTOZEROn?” “AUTOZEROn= state” “AUTOZEROn” “AUTOZERO1” The active Q-RPT is assumed if no suffix is given. “n” ‘1’ Specify the Hi Q-RPT ‘2’ Specify the Lo Q-RPT Default Optional Suffix Arguments ‘state’: ’0’ Autozero OFF ’1’ Autozero ON The RPM4 AutoZ function can be turned ON and OFF.
4. REMOTE OPERATION COM1 Purpose Command Query Classic Arguments Defaults Remarks Example (enhanced) Example (enhanced) Example (classic)) Errors See Also COM2 Purpose Command Query Classic Arguments Defaults Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also Read or set the RS232 settings for the COM1 port. “COM1 baud, parity, data, stop” “COM1?” “COM1=baud, parity, data, stop” “COM1” The baud rate. This may be ‘300’, ‘600’,’1200’,’2400’,’4800’, ‘9600’ or ‘19200’.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL CONTn Purpose Query Classic Optional Suffix Remarks Example (enhanced) Example (classic) See Also DATE Purpose Command Query Classic Arguments Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also ERR Purpose Query Classic Remarks Example (enhanced): Example (classic) See Also Have the RPM4 reply continuously as each new measurement becomes available. “CONTn?” “CONTn” The active Q-RPT is assumed if no suffix is given.
4. REMOTE OPERATION GPIB Purpose Command Query Classic Defaults Arguments Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also: HEAD Purpose Command Query Classic Defaults Arguments Remarks Example (enhanced) Example (classic) Errors See Also: ID Purpose Command Query Classic Arguments Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also Read or set the GPIB interface address.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL L2 / L3 Purpose Command Defaults Remarks Example (enhanced) Example (classic) See Also LOCAL Purpose Command Classic Remark Example (enhanced) Example (enhanced) Example (classic) See Also MEM Purpose Query Classic Remarks Example (enhanced) Example (classic) See Also Read or set the type of program command format to use (classic or enhanced).
4. REMOTE OPERATION MMODEn Purpose Command Query Classic Optional Suffix Arguments Read or change the active measurement mode. “MMODEn mode” “MMODEn?” “MMODEn=mode” “MMODEn ” The active Q-RPT is assumed if no suffix is given. “n” ‘1’ Specify the Hi Q-RPT ‘2’ Specify the Lo Q-RPT Mode: "A" "G" Absolute mode Gauge mode Measured pressure values are returned with “g” to identify measurement mode for both gauge and negative gauge measurement modes.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL PCALn Purpose Command Query Classic Defaults Optional Suffix Arguments Remarks Example (enhanced) Example (enhanced) Example (enhanced) Example (classic) Errors See Also PRn Purpose Query Classic Optional Suffix Remarks Example (enhanced) Example (classic) See Also Read or set the calibration information for the Hi or Lo Q-RPT. “PCALn adder, mult, CalDate” “PCALn?” “PCALn= adder, mult, CalDate” “PCALn” “PCALn = 0.0, 1.
4. REMOTE OPERATION PRR Purpose Query Classic Optional Suffix Remarks Example (enhanced) Example (classic) See Also QPRR Purpose Query Classic Optional Suffix Remarks Example (enhanced) Example (classic) See Also Read the next available Ready condition, pressure measurement, rate and on-board barometer reading. “PRR?” “PRR” The active Q-RPT is assumed if no suffix is given.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL RANGE Purpose Command Query Classic Default Remarks Example (enhanced) Example (classic) Example (classic) Errors See Also RATEn Purpose Query Classic Optional Suffix Remarks Example (enhanced) Example (classic) See Also READRATEn Purpose Command Query Classic Optional Suffix Arguments Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also Change the active range to the default range of the Hi or Lo.
4. REMOTE OPERATION READYCKn Purpose Command Query Classic Optional Suffix Remarks Example (enhanced) Example (enhanced) Example (enhanced) Example (classic) Example (classic) Errors See Also REMOTE Purpose Command Classic Remarks Example (enhanced) Example (enhanced) Example (classic) See Also RESn Purpose Command Query Classic Default Optional Suffix Arguments Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also Read or set the Ready check flag.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL RESET Purpose Command Classic Remarks Example (enhanced) Example (enhanced) Example (classic) See Also RPTn Purpose Query Classic Optional Suffix Remarks Example (enhanced) Example (classic) Errors See Also SCRSAV Purpose Command Query Classic Arguments Default Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also Reset the user’s settings to factory defaults. Corresponds to front panel “Reset – Sets”.
4. REMOTE OPERATION SN Purpose Query Classic Remarks Example (enhanced) Example (classic) See Also SR Purpose Query Classic Optional Suffix Remarks Example (enhanced) Example (classic) See Also SS%n Purpose Command Query Classic Optional Suffix Arguments Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also To read the serial number of the RPM4. “SN?” “SN” The RPM4 is serialized. The serial number can be read using this program message.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL SSn Purpose Command Query Classic Optional Suffix Arguments Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also TIME Purpose Command Query Classic Arguments Example (enhanced) Example (enhanced) Example (classic) Errors See Also UCOEFn Purpose Query Classic Optional Suffix Remarks Example (enhanced) Example (classic) See Also Read or set the current pressure stability limit.
4. REMOTE OPERATION UDU Purpose Command Query Classic Default Remarks Example (enhanced) Example (enhanced) Example (enhanced) Errors See Also Uln Purpose Command Query Classic Optional Suffix Arguments Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also Read or set the user defined pressure unit. “UDU label, ucoef” “UDU?” “UDU=label, ucoef” “UDU” User unit label (4 alphanumeric char maximum). It cannot be an already label: supported unit label.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL UNITn Purpose Command Query Classic Optional Suffix Arguments Remarks Example (enhanced) Example (enhanced) Example (classic) Errors See Also VER Purpose Query Classic Remarks Example (enhanced) Example (classic) See Also Read or set the pressure unit of measure unit and measurement mode.
4. REMOTE OPERATION ZOFFSETn Purpose Command Query Classic Defaults Optional Suffix Arguments Remarks Example (enhanced) Example (classic) Errors See Also 4.5 Read or set the AutoZ pressure offset (Poffset) for the specified or active Q-RPT in the current measurement mode. “ZOFFSETn GaOffset , AbsOffset , DifOffset” “ZOFFSETn?” “ZOFFSETn =GaOffset , AbsOffset , DifOffset” “ZOFFSETn” “ZOFFSETn = 0.0, 0.0, 0.0” (Gauge Q-RPT) “ZOFFSETn = 101325, 0.0, 0.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 4.5.2 STATUS BYTE REGISTER The RPM4 contains an 8 bit Status Byte Register that reflects the general status of the RPM4. Table 16. 8 Bit status byte register OPER (128) RQS/MSS (64) ESB (32) MAV (16) N/A (8) ERROR (4) N/A (2) RSR (1) This register is affected by the RPM4 reply output queue, the Error Queue, the Standard Event Status register and the Ready Event Status register.
4. REMOTE OPERATION MAV ERROR RSR 4.5.3 Message Available Bit 4 (16) Indicates that at least one reply message is waiting in the RPM4 IEEE-488 output queue. Error Queue Not Empty Bit 2 (4) Indicates that at least one command error message is waiting in the RPM4 IEEE-488 error message queue. Use the “ERR?” query to get this message. Ready Summary Bit 0 (1) Indicates that an enabled bit in the Ready Status Register became set.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 4.5.4 READY STATUS REGISTER The RPM4 contains an 8 bit Ready Status Register that reflects specific RPM4 Q-RPT measurement ready events. Enabled events in this register will set or clear the RSB bit of the Status Byte Register. Table 18.
4. REMOTE OPERATION 4.6 IEEE STD. 488.2 COMMON AND STATUS PROGRAM MESSAGES The RPM4 supports a set of commands that are common to all instruments conforming to IEEE Std. 488.2. These command make it easy to perform basic function for any device that supports these commands. These commands also cover the status reporting commands. See Section 4.5 for details on the status registers mentioned in these commands. Table 19. Program message list ∗CLS Clear all of the status & event structures.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL ∗IDN Purpose Query Remarks Example (enhanced) ∗OPC Purpose Command Query Remarks Example (enhanced) ∗OPT Purpose Query Remarks Example (enhanced) ∗RST Purpose Command Remarks Example (enhanced) See Also ∗SRE Purpose Command Query Default Arguments Remarks Example (enhanced) Errors ∗STB Purpose Command Remarks Example (enhanced) ∗TST Purpose Query Remarks Example (enhanced) Identify the RPM4 version, range, and serial number.
4. REMOTE OPERATION *RSE Purpose Command Query Default Arguments Remarks Example (enhanced) Errors *RSR Purpose Command Remarks Example (enhanced) Read or set the Ready Status Enable Register. “RSE n” “RSE?” “RSE 0” ’0 to 255’ This is the decimal representation of the bit(s) to enable. To enable the RDY bit, the argument would be 1.
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5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS 5. MAINTENANCE, ADJUSTMENTS A N D CALIBRATION 5.1 OVERVIEW RPM4 A70M/A20M-AF was designed for maintenance free operation. No maintenance is required other than: • Regular AutoZeroing of quartz reference pressure transducers (Q-RPTs) (see Section 3.5.1). • Periodic calibration of Q-RPTs (see Section 5.3). • Adjustment of the on-board barometer (see Sections 5.2.2).
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL If the RPM4 is used only in gauge mode, Autozeroing in absolute mode is not necessary and vice-versa. Gauge and absolute mode Autozeroing are completely independent one from the other. See Section 3.5.1 for complete information on Autozeroing of RPTs. 5.2.1.2 ABSOLUTE MODE AUTOZERO When operated in absolute mode, a Q-RPT should be Autozeroed about once a month or when the RPM4 has been exposed to a temperature change exceeding 15 ºC (36 ºF).
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS Never apply a pressure greater than 16 psi (110 kPa) to the barometer port. Overpressure and possible damage may result. 5.3 RPM4 Q-RPT CALIBRATION 5.3.1 PRINCIPLE RPM4 A70M/A20M-AF has two quartz reference pressure transducers (RPTs) that are the source of low pressure measurement uncertainty for the system. To adjust a Q-RPT, pressures from a reference standard are applied to the Q-RPT at ascending and descending pressure increments over the range.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL As editing PA and PM values changes Q-RPT calibration, they should only be edited by qualified personnel as part of the calibration process. Caution should be taken to avoid accidental editing and a security system is available to prevent access (see Section 3.5.5.5). Incorrect editing of PA and PM values can cause out of tolerance measurements. A new RPM4 is delivered with PA and PM values set to zero and 1 for all Q-RPTs.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS pressures. Absolute pressures are be defined by adding atmospheric pressure measured by a barometer to gauge pressure defined by the piston gauge. If, after calibration, the RPM4 will not be used in absolute measurement mode (as is often the case for higher pressure Q-RPTs) it may be calibrated in gauge mode using a gauge pressure standard.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 5.3.4 RECOMMENDED CALIBRATION POINT SEQUENCE Calibration adjustments to RPM4 Q-RPTs are made by altering calibration coefficients, PA and PM (see Section 5.3.1.1). To adjust these coefficients to optimum values giving the best results over the Q-RPTs’ complete operating range, the specific calibration point sequence defined in Table 20 is recommended.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS OPERATION See Section 5.3.7 for more detailed information on editing and viewing Q-RPT calibration information. Turning absolute mode operation ON and OFF for a Q-RPT occurs in the same area in which calibration coefficients are edited. To access the Q-RPT calibration editing area press [SPECIAL], <8cal> and select the desired Q-RPT. Then select <1edit> to make changes. [ENT] through the calibration information screens.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL To access Q-RPT calibration information viewing or editing press [SPECIAL], <8Cal>. Select the desired Q-RPT. The <1view> selection displays the calibration information fields. The <2edit> function displays the fields and allows them to be edited. The display is: 1. Date of last calibration in YYYYMMDD format. 2. Position designator of the Q-RPT being viewed. 3. Current value of absolute mode Poffset.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS Before proceeding to adjust a Q-RPT without using CalTool for Q-RPTs software, Sections 5.3.1, 5.3.2, 5.3.3 and 5.3.4. OPERATION The typical procedure for adjusting a Q-RPT is: Set-up and prepare the RPM4 for calibration (see Sections 5.3.2, 5.3.3). Use the [RANGE] function key to select the Q-RPT to be calibrated (see Section 3.3.1). Be sure to set the DF range (not an AutoRanged range). Use [HEAD] to set the HEAD to zero (see Section 3.3.7).
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 5.4 RPM4 REPAIR 5.4.1 REMOVING RPM4 FROM HPMS The RPM4/HPMS is an integrated assembly. The RPM4 should not be removed from the HPMS unless it is necessary for RPM4 and/or HPMS repairs. The RPM4 should be calibrated in the HPMS mounting system as the RPM4 orientation may affect its calibration.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS 1. 2. 3. 4. 5. 6. 7. HPMS TEST port connection RPM4 Hi Q-RPT connection RPM4 Lo Q-RPT connection RPM4 A70M/A20M-AF Lo Q-RPT connection tube Lo RPT shutoff valve rear connection Lo RPT shutoff valve side connection 8. RPM4 rack mount/HPMS connection 9. TEST port (DH500 F) 10. Hi Q-RPT connection tube 11. Rack mount bracket/rear support bracket connection 12. Rear support bracket 13. Rear support bracket/HPMS connection Figure 12. RPM4/HPMS disassembly view 5.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL web or have difficulty downloading or loading software, contact your DHI representative or a DHI Authorized Service Provider (see Table 23) for assistance. If you believe you have discovered an error or “bug” in RPM4 software, please report it with complete details by email to cal.repair@dhinstruments.com. The DHI flash software loading utility and RPM4 embedded software are available for download from www.dhinstruments.com in the SOFTWARE section.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS 5.4.4.2 POWER SUPPLY MODULE + 12 V DC (± 2 %) @ 2.1 Amps 5.4.4.3 DRIVER BOARD The driver board is controlled by the mini micro board (see Section 5.4.4.1). It supports: • Frequency counters (2) for reading Q-RPTs (see Section 5.4.4.5) • On-board barometer power and output (see Section 5.4.4.4) • Power to the system cooling fan • Remote [ENT] • Keypad and display • Beeper 5.4.4.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 5.4.4.7 COOLING FAN The cooling fan is mounted on the RPM4 rear panel and connected to the main board. It is a 12V brushless DC fan. 5.4.5 Q-RPT MODULE PNEUMATIC SCHEMATIC Figure 14. Pneumatic schematic of RPM4 Q-RPT Module 5.5 RPM4 ILLUSTRATED PARTS BREAKDOWN Table 21. RPM4 Front Panel Illustrated Parts Breakdown (see Figure 15) # REQUIRED DESCRIPTION PART NO.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS Table 22. RPM4 Rear Panel Illustrated Parts Breakdown (see Figure 16) # REQUIRED DESCRIPTION PART NO. 1 Rear panel 124154 8 Screw .30C100MXFS 1 Fan D2510M12B 1 Fan guard JGW25 2 Screw .25C160MXPS 1 Power entry module 06AK2D 2 Fuse,1A/250V,SLO-BLO,5X20 218001 1 DC power jack 103285 1 IEEE-488 assembly 401420 2 Screw lock kit 102073 1 J1 Accessory assembly 402195 2 Adaptor 2CM2-316 Figure 16.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL Table 23. RPM4 Illustrated Parts Breakdown of Display Assembly (see Figure 17) # REQUIRED DESCRIPTION PART NO. 1 Display assembly 103122 1 Ribbon cable 401963 1 Panel, front 123566 2 Standoff, M3 SS-5172-14.0-00 4 Screw, M3 .30C60KCSS 11 Washer .30NWSFS 5 Lock washer .30NLOCS 1 Retainer plate 123568 1 Nut, M3 .30CNFHS Figure 17.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS Table 24. RPM4 Illustrated Parts Breakdown of Internal Assembly (see Figure 18) # REQUIRED DESCRIPTION PART NO. 1 Bracket, barometer 123549 1 Barometer assembly 401898-06 1 Cable assembly, barometer 401966 8 Screw .30C60KCSS 14 Lock washer .
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL Table 25. RPM4 Illustrated Parts Breakdown of Internal Assembly (see Figure 19) # REQUIRED DESCRIPTION PART NO. 1 Manifold, A20M 123521 1 Manifold, A70M 124410 14 Screw, M3 .30C60KCSS 14 Lock washer, M3 .
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS Table 26. RPM4 Illustrated Parts Breakdown of Electronic Chassis (see Figure 20) # REQUIRED DESCRIPTION PART NO. 1 Micro card 401365 4 Standoff SS-5172-200-00 10 Screw .30C80KCSS 11 Lock washer .30NLOCS 1 Driver board 401745 1 Power supply 103284 4 Standoff .30C300SFTS 4 Washer .30NWSFS 1 Cable assembly, DC power 401962 1 Cable assembly, AC power 401964 Figure 20.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL 5.6 HPMS MAINTENANCE There are no HPMS maintenance procedures other than the overhaul procedure. 5.6.1 HPMS OVERHAUL RPM4/HPMS A70M/A20M-AF is generally overhauled as one common assembly. Removal of RPM4 from the HPMS is not recommended unless required to perform RPM4 and/or HPMS repairs. See Section 5.4.1 if it is necessary to remove the RPM4 from the HPMS.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS 5.7 HPMS ILLUSTRATED PARTS BREAKDOWN Table 27. HPMS Assembly Illustrated Parts Breakdown (see Figure 21 and 22) # REQUIRED DESCRIPTION PART NO.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL Figure 21.
5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS Figure 22.
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6. TROUBLESHOOTING 6. TROUBLESHOOTING RPM4 is a sophisticated pressure setting and measuring instrument with advanced on-board features and functions. Before assuming that unexpected behavior is caused by a system defect or breakdown, the operator should use this manual and other training facilities to become thoroughly familiar with RPM4 operation.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL SYMPTOM PROBABLE CAUSE SOLUTION The Q-RPT range does not cover the specified AutoRange full scale pressure. Check that Q-RPT default range is high enough to cover the AutoRange. 3.2.3 The specified operating mode is absolute and absolute is OFF for the desired Q-RPT Check that absolute measurement mode is ON for the Q-RPT. 5.3.5 Pressure display is flashing and beeper is sounding intermittently.
6. TROUBLESHOOTING SYMPTOM PROBABLE CAUSE SOLUTION Incorrect pressure units and/or measurement mode (gauge or absolute). Set desired pressure units and/or measurement mode. Consider reference temperature if unit is inWa. 3.3.2, 3.3.3 Q-RPT calibration coefficients have been altered. Check and correct calibration coefficients if needed. 5.3 AutoZ has been run and turned ON with an incorrect standard for zero. Check value of Poffset. Rerun AutoZ with a valid reference. 3.5.
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7. APPENDIX 7. APPENDIX 7.1 UNIT CONVERSION 7.1.1 PRESSURE RPM4 performs all internal calculations in SI units. Numerical values input or output in other units are converted to SI immediately after entry and back to other units just before output as needed. Table 28 provides the conversion coefficients used by RPM4 to convert numerical values expressed in SI units to corresponding values expressed in other units. Table 29.
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8. WARRANTY 8. WARRANTY 8.1 OVERVIEW Except to the extent limited or otherwise provided herein, DH Instruments, a Fluke Company 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.
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9. GLOSSARY 9. GLOSSARY Axxx A type of Q-RPT with a built-in vacuum reference that is intrinsically absolute (e.g. A10M). Axxx Q-RPTs support absolute, gauge and negative gauge measurement modes. Absolute Mode Measurement mode in which the Q-RPT indicates absolute pressure (difference from vacuum). Active Q-RPT The Q-RPT that is currently selected to be displayed on the top line of the RPM4 display. Most function selections affect the active Q-RPT.
RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL Poffset The difference between a Q-RPT reading and the AutoZero reference at the time AutoZ is run. Used by the AutoZ function when Auto Z is ON to compensate Q-RPT readings for changes in zero over time. Pstd,0 AutoZero reference value. Value indicated by the device against which the Q-RPT is zeroed by AutoZ. PA Pressure adder, used to offset a Q-RPT or barometer to calibrate it.
