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Manual 7000 Pressure Monitor_B 2000

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1. 5 7 9 46 SCPI STATUS BEGISTERS 5 8 5 5 6005 INTERFACE PANEL EMULATION 5 9 5 6 SERIAL OPERATION a si ea aea br 5 9 SECTION 6 0 MAINTENANCE INTRODUCTION EE 6 1 6 2 OBSERVING THE SOFTWARE VERSION NUMBER 6 1 6 3 PREVENTIVE MAINTENANCE icto eee 6 1 6 3 1 INITIATING THE DPI S SELF TEST itii n Eee Eh 6 1 6 3 2 REMOVING THE COVER ore pen eat 6 2 0 39 MOISTURE FIBIBER 6 2 6 9 4 VACUUM PUMPS dissitis da etate 6 2 6 3 9 PROCESSOR BATTERY igs 6 3 6 3 6 MEMORY CARD BATTERY 6 3 6 4 CALIBRATION Gu opa iot reta a tiia Rd oo baee da Mo eret bala a E oa Edd 6 3 6 4 1 CALIBRATION INSTRUCTION Stes eia testa to eo 6 3 6 4 1 1 PREPARATION EST ea 6 3 6 4 1 2 STORING THE COEFFICIENT Sic deiode obo en 6 5 6 4 2 VACUUM NEGATIVE GAUGE CALIBRATIONS 6 6 6 4 3 EDITING THE CALIBRATION COEFFICIENTS 6 6 GAA ZEROING nale cl dudit dae del dudes 6 7 6 4 4 1 GAUGE ONLY INSTRUMENTS eene 6 7 6 4 4 2 DIFFERENTIAL 1 6
2. 5 e vii SECTION 1 0 GENERAL INFORMATION INTRODUCTION lilla late 1 1 1 2 25 66 1 1 ES FEATURES sasanidi 1 1 14 STANDARD EQUIPMENT amp OPTIONS 1 2 SECTION 2 0 THEORY OF OPERATION Zu INTRODUCTION detta a ERE EE Ire b evo 2 1 232 POWER SUPPLY prot bi do airone 2 1 254 ELECTRONICS MOUDLE 5 Te d bd 2 3 23T CONTROL BOARD dude 2 3 2 3 2 MICROPROCESSOR BOARD re Eres 2 3 2 3 9 OPTION BOARD 55 ee dic 2 3 2 34 CIEEE 409 INTERFACE tonto Lean 2 3 2 32 FRONT PAPEL eite aiar 2 3 2 4 PNEUMATICS MODULE porla 2 4 2 4 1 MEASURE MODE 2 4 24 1 1 REFERENCE PORT deret dba t ded hoe 2 4 24 1 2 TEST PORT d eco eaa daa cds 2 5 24 TRANSDUCER MODULE rtt nda i re i aad ena ia ta 2 5 2 5 1 QUARTZ BOURDON TUBE SENSOR TRANSDUCERO 2 5 2 9 2 SENSOR BOARD 2 7 2 5 3 LINEARIZATION TERM tiec rit GR a Cere 2 7 2 5 4 AUXILIARY SENSORS natalia 2 7 2 5 4 1 CASE REFERENCE VACUUM SENSOR 2 7 20 SOFTWARE
3. 7 Head Corrected Pressure L HeadPressure L K Calibration coefficients HeadPressure Head presure R A D Reading Counts to Pressure Conversion Factor K FullScale k 200 000 Vacuum Correction Z Vacuum v Ky THEORY OF OPERATION 2 8 Oven Temperature Offset Z OvenSetpoint OvenTemp Oven Temperature Slope S 21 0 K OvenSetpoint OvenTemp Case Pressure Offset K Case Pr essure 2 Eten FullScale Full scale pressure of the 7000 Vacuum Vacuum level for absolute measurements OvenSetpoint Oven temperature setpoint 50 0 C OvenTemp Current oven temperature reading K Oven temperature offset factor K Oven temperature slope factor Case pressure effect factor The setup and configuration of the DPI is stored in nonvolatile memory EEPROM on the system board The data is stored in sections each with a CRC Cyclic Redundancy Check checksum If the CRC checksum is not correct on power up the system displays an error message and uses default values 100 psi Differential Linear calibration etc The following information is stored in EEPROM and is available to the processor on reboot of the controller Manufacturing Data Sensor Type Absolute Differential and Full Scale Oven Temperature and Case Effect Corrections Serial Number Date Acquisition Calibration Coefficients Calibration Date Time Oven Control Parameters Mux Secondary
4. a nta trud RR 2 7 2 6 1 SOFTWARE SAFETY 2 7 2 6 1 1 PREVENTING OPERATOR ERRORS 2 8 2 6 1 2 2 8 2 6 1 3 PRESSURE READING AND CORRECTION 2 8 Vi SECTION 3 0 INSTALLATION 3 1 2 2 3 3 3 4 3 5 4 1 4 2 4 3 INTRODUCTION TEE 3 1 UNPACKING e c rua as ang 3 1 CAUTIONS lillo era 3 2 POWERING UP THE DEPI saliera 3 2 3 4 1 OBSERVING THE DPI S FULL SCALE RATING 3 3 PNEUMATIC CONNECTIONS sicura iata 3 3 FEST PORD made 3 3 3 3 2 REFERENCEPORT api envia ne dide 3 3 SECTION 4 0 LOCAL OPERATION MEASURING PRESSURE ill rae rh dh oes aio 4 3 4 1 1 SELECTING MODE OF OPERATION 4 3 4 1 1 1 GAUGE ONLY INSTRUMENTS sassate 4 3 4 1 1 2 ABSOLUTE ONLY 4 3 4 1 1 3 DIFFEREINTIAE INSTRUMENTS 4 3 4 1 1 3 1 ABSOLUTE MODE sil 4 3 4 1 1 3 2 GAUGE MODE 4 4 4 1 1 3 3 DIFFERENTIAL MODE 4 4 4 1 2 SELEGTING PRESSURE UNITS ii et tos beat 4 4 4 1 3 DEFINING A NEW PRESSURE UNIT ica 4 4 4 1 4 CHANGING THE NUMBER OF 5
5. 4 5 4 1 5 SETTING THE ALARM LIMITS aeneae tito 4 5 4 1 6 USING THEAD PRESSURE CORRECTION 4 5 45157 ZEROING ed eris MUS ER Opp UR SUR 4 6 CONFIGURATION uiu Ra 4 6 4 2 1 4 6 42 2 TEST ACCESS PASSWORD 4 7 4 2 3 GRAPH MAXIMUM lia 4 7 AD Ar KEY CLICK uei etn cet eee e ed e e 4 7 4 215 EINABEE ERROR pl qud du Ra dull di vx 4 7 22 5 DATE TIME cist catered bet pudet ado a 4 8 MEMORY GARD saronno 4 8 CARD SUPPORT 4 8 4 3 2 SAVING RESTORING SETUP 4 8 4 3 3 SAVING RESTORING CALIBRATION INFORMATION 4 8 INTRODUCTION viii SECTION 5 0 REMOTE OPERATION 5 1 CAPABILITIES 5 1 5 1 NN elc 5 2 9 2 JREMOTE EOCAL OPERATION oid ei eue d e th e eene o n Ei eeu es 5 2 5 3 CONFIGURATION 5 3 Od BEVICEMESSAGES andai RA 5 3 5 4 1 SCPI COMMAND FORMAT 5 3 942 SCPI RESPONSE FORMAT rateali 5 4 5 4 3 ANSI IEEE 488 2 1987 COMMAND SUMMARY 5 4 5 4 4 SCPI COMMAND SUMMARY ici 5 4 5 4 5 EXAMPLE SCPI COMMUNS
6. aa Li i ss E m RUSKA MODEL 7000 DIGITAL PRESSURE INDICATOR USER S MANUAL DIGITAL PRESSURE INDICATOR MODEL 7000 USER S MANUAL RUSKA INSTRUMENT CORPORATION 10311 WESTPARK DRIVE HOUSTON TEXAS 77042 713 975 0547 FAX 713 975 6338 E MAIL ruska ruska com Release 7000 1001 Revision B Date 10 13 00 WARRANTY Ruska Instrument corporation warrants its products to conform to or exceed the specifications as set forth in its catalogs in use at the time of sale and reserves the right at its own discretion without notice and without making similar changes in articles previously manufactured to make changes in materials designs finish or specifications Ruska Instrument Corporation warrants products of its own factory against defects of material or workmanship for a period of one year from date of shipment Liability of Ruska Instrument Corporation under this warranty shall be limited to replacing free of charge FOB Houston Texas any such parts proving defective within the period of this warranty but will not be responsible for transportation charges or consequential damages This warranty is not made for products manufactured by others which are illustrated and described in Ruska catalogs or incorporated in Ruska products in essentially the same form as supplied by the original manufacturer However Ruska Instrument Corporation agrees to use its best eff
7. 2 Enclose the DPI in plastic or any good water barrier material Antistatic material is recommended If the original shipping carton is not usable or available use a double walled corrugated carton with 275 16 rating The recommended carton size is 25 1 2 x 19 1 2 x 12 3 8 inches Insert one form cradle from the original shipment onto the floor of the box The original foam cradles are of the same type of construction and are completely interchangeable If the foam cradles are not available cover the bottom and sides with no less than 3 inches of N 95 foam strips Arrange the strips in the configuration illustrated in Figure 7 1 Before sealing the carton include the following a Statement of the problem or service needed Be specific Include the name and telephone number of a knowledgeable technician for consultation b The part number serial number return address and purchase order number 6 Seal the carton using gummed tape 7 Address the carton to RUSKA INSTRUMENT CORPORATION 10311 Westpark Drive Houston Texas 77042 Label the carton with the following labels THIS SIDE UP HANDLE WITH CARE DO NOT DROP and FRAGILE If the original Ruska shipping carton is utilized for this shipment the above markings are preprinted on the carton PREPARATION FOR STORAGE amp SHIPMENT 7 2 Figure 7 1 Packing the DPI 7 3 SHIPPING INSTRUCTIONS Ruska recommends using air freight for transportation Sur
8. Test Fon Standard Standard Standard Optional Standard Isolation Weight 35 1 15 9 351b 15 9kg 351b 15 9 4 dee 35 1b 15 9 kg gauge absolute V vacuum Optional Defined as the combined effect of linearity repeatability and hysteresis throughout the operating temperature range Whichever is greater 5 Defined as 1096 FS increments into a 15 cubic inch volume Supply vacuum is not applicable for instruments ranging from 501 2500 psi A 3 APPENDIX A THIS PAGE INTENTIONALLY LEFT BLANK APPENDIX A A 4 APPENDIX SUMMARY ERROR MESSAGES Negative error numbers are from the Standard Commands for Programmable Instruments Version 1991 0 Value Description and Corrective Action 0 No Error 103 Invalid Separator Check punctuation in the SCPI command 104 Data Type The type of parameter data is incorrect 109 Missing Parameter No valid parameter was found for the SCPI command 110 Command Header The command name is not valid 113 Command Unknown The command specified does not exist 114 Header Suffix The numeric suffix for the command name is out of range 221 Settings Conflict command could not be executed due to current state of the DPI Some commands cannot be executed while a program self test or calibration is in progress 222 Out of Range The value is not within the
9. LOCAL OPERATION 4 8 SECTION 5 0 REMOTE OPERATION 5 1 CAPABILITIES The DPI can be operated remotely by a computer Two interfaces are supported IEEE 488 and RS 232 Both interfaces support SCPI standard Commands for Programmable Instruments The IEEE 488 interface additionally supports emulation of a Ruska Single Channel Interface Panel Models 6005 701 and 6005 761 The IEEE 488 interface conforms to the following standards ANSI IEEE Std 488 1 1987 IEEE Standard Digital Interface for Programmable Instrumentation ANSI IEEE Std 488 2 1987 IEEE Standard Codes Formats Protocols and Common Commands SCPI 1991 0 Standard Commands for Programmable Instruments 5 1 1 IEEE 488 The following identification codes define the interface capabilities of the DPI Identification codes are described in the IEEE 488 standard SH1 Source Handshake Complete Capability Acceptor Handshake Complete Capability T5 Talker 13 Listener SRI Service Request Complete Capability RL Remote Local Complete Capability PPO Parallel Poll No Capability Device Clear Complete Capability DTO Device Trigger No Capability CO Controller No Capability The IEEE 488 interface is installed next to the processor board The interface is identified by the IEEE 488 standard connector on the back panel of the unit NOTE Do not change any jumpers or switch settings on the IEEE 488 interface board The IEEE 488 address is set by the MAIN SETU
10. Reserved 0 Time Is questionable Set when the clock has not been set Temperature is questionable Set when the oven temperature is not within range Reserved 0 Reserved 0 REMOTE OPERATION 5 8 Bit6 Reserved 0 Bit 7 Calibration is questionable Set when the unit has not been calibrated Bit 8 Pressure is questionable Set when the pressure is overranged Bit9 Reserved 0 Bit 10 Reserved 0 Bit 11 Reserved 0 12 Reserved 0 Bit 13 Reserved 0 Bit 14 Command warning Set whenever a command ignores a parameter 15 Reserved 0 5 5 6005 INTERFACE PANEL EMULATION The DPI may be configured to emulate the IEEE 488 command set of the Ruska Single Channel Interface Panel Models 6005 701 and 6005 761 Set the Interface Panel User s Manual for a description of the protocol The DPI emulation has the following differences The DPI is always in Remote mode Byte 1 Bit 1 All TI strip outputs must be written as OFF No special functions are implemented Pup i Any message written tot he EPI that starts with a colon as the first character is interpreted as a SCPI command To change from SCPI to Interface Panel Emulation via the remote interface send the following message SYSTem LANGuage SCPI 5 6 SERIAL OPERATION The RS 232 port accepts the same SCPI commands as the IEEE 488 port commands can be terminated by a carriage return hexadecimal OD or a line feed hexadecimal OA The response
11. The electronics self test will and display the results 3 Press PREV to return to the previous screen The electronics test runs eight sets of tests on various parts of the electronic modules Table 6 1 describes these tests and the possible actions needed if a test fails 6 1 MAINTENANCE Table 6 1 Electronics Self Test Description Action on Failure RIC Part Coprocessor Tests the 80 287 math coprocessor Replace chip 13 932 chip Replace processor board 7000 286 16 Clock Tests the real time clock Replace processor board 7000 286 16 Timer Tests the 10 ms interval timer Replace 7000 PCA 001 EEPROM Tests the nonvolatile memory Replace 700 PCA 001 Oven Tests operation of the sensor oven Replace 7000 PCA 001 Replace sensor assy 15 Tests negative power supply Replace 7000 PCA 001 15 Tests positive power supply Replace 7000 PCA 001 5 Tests main logic power Replace power supply 62 288 See figure 4 2 for viewing voltages 6 3 2 REMOVING THE DPI S COVER The DPI should kept clean and completely assembled at all times Operating the DPI without its cover affects the DPI s thermal gradients and therefore reduces precision If it becomes necessary to remove the 5 cover follow the instructions below CAUTION The DPI should only be opened by qualified electrical mechanical service technicians Lethal voltages are present and exposed in the power suppl
12. 5 Repeat steps 4 and 5 until all four coefficients are correct NOTE In addition to saving the calibration coefficients tot he DPl s memory separately record the calibration coefficients and store this backup in a safe place 6 To exit the editing procedure without storing the calibration coefficients in memory press CANCEL To store the calibration coefficients in memory select OK F6 7 Press PREV to return to the Main menu Once the calibration coefficients are input the user should record several pressure readings If there are any variances beyond the stated precision at these points then the calibration procedure should be performed 6 4 4 ZEROING The zeroing procedure is performed to correct for system zero shift and does not require a full calibration The most important requirement for performing a valid zeroing procedure is to guarantee that there is not a pressure differential between the sensor s test port and case reference If during the zeroing procedure the message Mechanical Zeroing Needed appears the sensor photocell may need to be zeroed See Section 6 5 for more information The zeroing screen presents several pieces of information 6 7 MAINTENANCE Counts count equals 0 0005 FS C Oven Oven temperature Ref psi Case reference pressure excluded in Absolute mode DPls Delay Time Total time delayed while in zero display If any of the above are unstable then the system will de
13. Press PREV to exit the menu Press CANCEL to return all edited fields to their original values 4 1 6 USING HEAD PRESSURE CORRECTION The term head height refers to the vertical distance between the sensing element in the device under test and the DPl s sensor Once the user inputs the head height and selects air or nitrogen the automatically corrects for head pressure 1 Locate Pressure Reference Line on the DPI s front panel This line provides the reference plane against which the Device Under Test DUT pressure is measured 2 Determine the vertical distance between the Pressure Reference Line and the sensing element in the device under test 4 5 LOCAL OPERATION di The head height is set from the Setup User Menu From the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 and then User F2 4 Press Length F1 to select either inches or millimeters mm for the head height entry The selected units will appear on the Gas Head line to the right of the number 5 Highlight Air or Nitrogen 6 Use the up or down arrows to highlight the label Head Height 7 Use the numeric keypad to enter the height Use a positive value if the device under test is below the DPI and a negative value if the device under test is above the DPI 8 Press ENTER to accept the entry 4 1 7 ZEROING Ruska recommends that the DPI be zeroed once a day to maintain optimal performance
14. been met the DPI may not be able to achieve a final steady state controlled pressure within the settling time specification Finally if the DPI is commanded to a pressure outside of the applicable control pressure range the nonlinearity in the pressure output may be greater than that specified Performance Specifications give the user the most fl4xibility and control over accuracy claims The term accuracy is defined by ISA S37 1 as either the ratio of the error to the full scale output FS or the ratio of the error to the reading RDG Note that the definition of accuracy is not the summation of some or even all of the possible error source maximum limits The true accuracy of an instrument is relative to the actual error introduced by the calibration transfer standard plus the actual error not eliminated from the instrument s indicated output Therefore an instrument s accuracy can be influenced by introducing more or less actual error through the choice of a calibration standard or its accuracy can be varied by the elimination of actual errors inherent in the instrument For example if an instrument has a known error due to being used in an attitude or tilt the FS zero shift error can be eliminated by rezeroing the instrument in the tilted position Even RDG sensitivity shifts can be eliminated mathematically or by controlling the attitude of the instrument during its calibration The key to eliminating an error is knowing its sourc
15. current operation The CANCEL key returns all edited fields on the current entry screen to their original values It also stops the current program sequence or calibration process The PREV key exits the current menu and returns to the previous menu The ABORT key causes an immediate shutdown and restart of the system Figure 4 2 is a menu tree showing the relationship between all the menus in the system Refer to it for selections available under the menu To move to a lower menu press the function key with the correct label To move towards the main menu press the PREV key 4 1 LOCAL OPERATION LOCAL OPERATION Main Menu Enter Setup Menu Set High Low Slew Overshoot and Access Code Configure User Preferences Set Display Unit Define User Display Units Set Baud Rate Parity Data Bits and GPIB Address Set Date Time Opto22 Setup Reset DPC Display Software Version Enter Calibration Menu Autozero Calibrate Primary Transducer Enter Test Menu Perform Electrical and Pneumatic Self Test Display Ruska Logo and Instrument Pressure Range Display Remote Communication Hardware Status Diagnostic Options Display Transducer Values Display Pressure correction Factors Display Power Supply Turn on Screen Saver Figure 4 2 Menu Tree 4 2 4 1 MEASURING PRESSURE The Main Menu displays the measured pressure in double size numbers To the right of the pressure is the current unit and type Gauge Differential or Ab
16. they may be restored to the DPI at any time by editing the coefficients Section 6 4 3 6 4 1 CALIBRATION INSTRUCTIONS To calibrate the DPI the user connects a calibration standard such as the Ruska Instrument Model 2465 Gas Piston Gauge to the DPl s test port then follows the three step calibration procedure on the DPl s display This procedure requires the user to control the calibration standard to 50 and 100 of the full scale rating Section 3 4 1 The standard DPI requires a positive pressure calibration vacuum gauge option is available and requires special calibration per Section 6 4 2 No disassembly is required and there are no potentiometers to tune NOTE The uncertainty of the final calibration must include the uncertainty of the pressure standard being used 6 3 MAINTENANCE 6 4 1 1 Preparation 1 2 4 Verify that the DPl s Reference Port is open to atmosphere for gauge calibrations Verify that the calibration standard is connected to the Test Port Verity that the DPI has been at stable environmental temperature and that the oven temperature MAIN DISPLAY has been stable for at least two hours Verity that the DPI is in Measure mode Section 4 0 If desired change the DPI s units of measure Section 4 0 to match those of the calibration standard To go to the calibration screen select MAIN CAL To begin the calibration process press the recessed calibration button beneath th
17. 22 connector which communicates with the user s OPTO 22 modules through a cable that connects to the back panel 2 3 2 MICROPROCESSOR BOARD All of the 5 software resides in nonvolatile programmable read only memory Flash EPROM on the Microprocessor Board which plugs directly into the Control Board This software contains all of the instructions that operate the DPI as well as the conversion factors that the DPI uses to translate the detected pressure into the units selected by the user These factors are given in Table 2 1 When the DPI powers up its software is loaded into random access memory RAMO also on the Microprocessor Board At the same time the values stored in EEPROM on the Control Board are restored to memory Another important component on the Microprocessor Board is the lithium battery The battery continuously updates the DPl s date and time even when the unit is powered down The Microprocessor Board also supports the RS 232 serial interface that allows the user s computer to communicate with the DPI THEORY OF OPERATION 2 2 Table 2 1 Conversion Factors Unless specified otherwise conversion factors are based on ANSI 268 1982 Conversion Factor kPa x 0 2952998 kPa x 0296134 0 0 01 0 1450377 cmH O kPa x 10 19744 inH O kPa x 4 014742 kg cm kPa x 0 0101972 kPa x 7 500605 cmHg kPa x 0 7500605 knots er NASA TN D 822 km hr knots x 1 852 feet er MIL STD 859A met
18. 8 6 4 4 2 1 GAUGE MODE 6 8 6 4 4 2 2 ABSOLUTE MODE acs 6 8 6 4 4 3 ABSOLUTE INSTRUMENTS erica 6 8 6 SENSOR PHOTOCELL ZEROING 6 9 SECTION 7 0 PREPARATION FOR STORAGE amp SHIPMENT 7 1 DISCONNECTING THE DP Lelio pea eie dora tia 7 1 422 epis 7 1 752 SHIPPINGINSTRUCTIONS 7 3 APPENDIX A SUMMARY OF SPECIFICATIONS B Colleen 1 A SPEGIFICATIONS sister rana aaa A 2 APPENDIX B SUMMARY OF ERROR B 1 LIST OF FIGURES FIGURE 2 1 MODEL 7000 BLOCK DIAGRAM 2 1 FIGURE 2 2 MODEL 7000 DPI DIFFERENTIAL PNEUMATICS DIAGRAM 2 4 FIGURE 2 5 SHAET MAGINET SECTION tiat diretta oce dite tede poet ede 2 6 FIGURE 2 6 SPOT Hen cale 2 6 FIGURE 2 7 AUXIEEARY SENSOR DISPLAY er t noie reos 2 8 FIGURE 3 1A MODEL 7000 BACK PAINEL oca ts ee to reae reete 3 4 FIGURE 3 1 MODEL 7000 ABSOLUTE BACK 1 1 3 4 FIGURE 3 1C MODEL 7000 HIGH PRESSURE BACK PANEL 3 5 FIGURE 4 1 MODEL 7000 FRONT PANEL e pe RO Ee 4 FIGURE 4 2 MENU TREE ba ath s 4 2 FIGURE 6 4 VACUUM CALIBRA
19. NS Pressure Source Medium Pressure Source Particle Size Contamination Pressure Source Max Moisture Content Pressure Source Max Hydrocarbon Content VACUUM REQUIREMENTS Supply Vacuum Reference Vacuum Industrial grade nitrogen 99 5 pure APPENDIX A 1 2500 psi 0 07 172 bar Graphical vacuum florescent 90 260 VAC 50 400 Hz 150 W 102 120VAC 60Hz or 102 110VAC 50Hz 204 240VAC 60Hz or 204 220VAC 50Hz 18 36 C 20 70 C 5 95 relative humidity noncondensing 5 60 in 7 H x 17 Wx 16 D 17 8 cm x 43 2 cm x 40 6 lt 0 004 FS in 24 hours User selectable up to 1 1 000 000 Negligible Nitrogen or Air 1 4 inch NPT female Internal relief valves auto vent feature inHg at 0 and 60 C kPa bar psi inH O at 4 20 and 25 C kg cm mmHg at 0 C cmHg at 0 C and at 4 C Nitrogen or Air lt 50 microns 50 C dew point 30 ppm 50 liters per minute minimum 100 liters per minute minimum Table 1 Performance Specifications Pressure Range 1 4 9 psi 5 100 psi 101 500 psi 501 2500 15 120 psi 0 07 0 33 0 34 6 9 bar 7 34 4 bar psi 1 8 3 bar bar 34 5 172 bar Mode Gauge G A V G A V G A Absolute Precision 0 007 FS 0 003 FS 0 003 FS 0 003 FS 0 003 FS ME r 0 005 RDG 0 005 RDG 0 005 RDG 0 005 RDG 0 005 RDG Electrical Power 115 240 VAC 115 240 115 240vac 11597 240 115 240
20. NSTALLATION 3 4 Figure 3 1C Model 7000 High Pressure Back Panel CAUTION For 5 with ranges from 1 to 4 99 psig the reference 2 port must be left open to atmosphere Do not apply a positive ve do pressure or a vacuum to the reference port on these units Refer to N figures 2 2A through 2 2C for plumbing information 3 5 INSTALLATION THIS PAGE INTENTIONALLY LEFT BLANK INSTALLATION 3 6 5 4 0 LOCAL OPERATION This section of the manual describes operation of the DPI using the front panel The local interface front panel consists of a vacuum fluorescent display and a set of keys The display shows the system status and menu options The keys are grouped according to function Figure 4 1 Model 7000 Front Panel Numeric Keypad This includes the number keys the decimal point and the change sign key The CLEAR key will clear the numeric entry field The ENTER key accepts the entered number or confirms a command Function Keys The F1 through F6 keys are used to navigate the menus and perform predefined functions The name of the function is displayed above the key on the bottom line of the display Arrow Keys The up and down arrows select a field for editing and are used for small pressure changes pressure jog at the main menu The left and right arrows select between multiple choice options for the selected field CANCEL PREV ABORT These keys are used to stop undo or exit the
21. OPERATION 5 4 2 5 RESPONSE FORMAT Only commands ending in a question mark 2 have responses Multiple values from a single command are separated by commas Responses from different commands in the same message are separated by semicolons The response message is terminated by a line feed hexadecimal OA Integer responses are returned as one or more digits Boolean values ON and OFF values are always returned as numbers with zero for OFF and one for ON Floating point values are returned in the formal d ddddddddE dd 5 4 3 ANSI IEEE 488 2 1987 COMMAND SUMMARY CLS Clear Status ESE Event Status Enable Query ESE lt number gt Event Status Enable ESR Event Status Register DN Identification OPC Operation Complete Query Returns 1 OPC Operation Complete RST Reset SRE Service Request Enable Query SRE lt number gt Service Request Enable STB Status Byte Query TST Self Test Query WAI Wait No operation 5 4 4 SCPI COMMAND SUMMARY The current value associated with a SCPI command may be read by appending a question mark to the command For example CALC LIM UPP will return the current upper pressure limit MEASure PRESsure Returns Current Pressure Reading TEMPerature2 Returns Oven Temperature PRESsure2 Return Case Pressure TEMPerature Returns Gas Temperature VOL Tage Returns 15V volts VOLTage2 Returns 15V volts VOLTage3 Returns 5V volts SLEW Returns Pressu
22. P REMOTE screen 5 1 REMOTE OPERATION 5 1 2 RS 232 5 232 interface supports standard serial operation from computer to a single DPI RS 232 supports the IEEE 488 2 SCPI commands The DPI allows the following port setups Baud Rate 1200 2400 9600 or 19200 Data Bits 7 or 8 Parity Even Odd or None Stop Bits 1 2 Handshaking XON XOFF The RS 232 connection is a DB 9P connector found on the back panel of the DPI It is located on the processor board directly above the DB 25S connector The following pins are used all other pins are reserved Pin Direction Signal 2 In RXD Receive Data 3 Out TXD Transmit Data 5 0 GND Ground 7 Out RTS Request to Send 5 2 REMOTE LOCAL OPERATION In Local mode the DPI is operated manually through the front panel Section 4 covers local operation The DPI always powers up in the Local mode In Remote mode the DPI is operated by a computer connected to an interface Most functions that can performed in Local mode can also be performed remotely Remote mode does not automatically disable local operation The remote interface may be active while local operations are being done In cases where full remote control is required the following methods may be used 1 Issue Local Lockout interface message via the IEEE 488 interface will disable the local keyboard until the Go To Local GTL interface message is received or the REN Remote Ena
23. Sensor Coefficients Global Data Units Head Correction Reading Type Absolute Differential Gauge Local Step Size and Bar Graph Maximum Control Pressure Limits Remote Protocol Setup Programs 2 9 THEORY OF OPERATION An abort key is available the front panel When this key is pressed the DPI will immediately close all valves show a message on the front display and reset the system software THEORY OF OPERATION 2 10 5 3 0 INSTALLATION 3 1 INTRODUCTION This section of the manual discusses initial installation for the Model 7000 DPI Installing the DPI involves connecting the test pressure tubing powering up the unit and configuring the system through the front panel 3 2 UNPACKING THE DPI Carefully unpack all components checking for obvious signs of damage In addition to any optional items ordered with the DPI the shipment contains the following items n a Model 7000 Digital Pressure Indicator a power cord a user s manual a calibration report and a small tools kit If necessary report any shipping damage to the freight agency Remove all shipping and packing materials including the shipping plugs from all components If possible save the packing materials for future use Finally install the DPI in a location that meets the requirements listed in Table 3 1 NOTE The DPI should not be subjected to mechanical shocks or vibration during installation or use It should be mounted on a rigid b
24. TION ippica 6 6 FIGURE 6 5 PHOTOGELETOGATEODBU nde eh erede npa e 6 10 FIGURE 7 1 PACKING THE DPI eer pte ra o e reg ae 7 3 LIST OF TABLES TABLE 1 1 OPTIONS LIST FOR THE MODEL 7000 1 3 TABLE 2 1 CONVERSION FAG TORS 2 3 TABLE 3 1 GENERAL SPECIFICATIONS GENERAL PARAMETERS 3 2 TABLE 6 1 ELECTRONIC SELF TEST ia deua etait edu la he oa rite aH 6 2 TABLE A 1 PERFORMANCE SPECIFICATIONS x iii A 3 INTRODUCTION SECTION 1 0 GENERAL INFORMATION 1 1 INTRODUCTION This manual contains operation and routine and preventive maintenance instructions for the Model 7000 Digital Pressure Controller DPI manufactured by Ruska Instrument Corporation Houston Texas This section of the manual provides general information about the DPI and presents its features and options 1 2 GENERAL INFORMATION The Ruska Model 7000 DPI uses force balanced fused quartz Bourdon tube technology to provide the precise measurement of pressure During normal operation the DPI performs in Measure mode only In Measure mode the DPI measures pressure Typically Measure mode applications are found in research laboratories wind tunnel testing power plant testing and bubbler tank volume accountancy systems It is also used to monitor barometric pressures vacuum systems and differential pressure devices 1 3 FEATURES The following features are stand
25. Zero drift is a separate specification from precision and stability The zero drift specification is defined in Appendix A under General Specifications Refer to Section 6 4 4 in this manual for the zeroing procedure 4 2 CONFIGURATION 4 2 1 CALIBRATION PASSWORD The calibration password allows the operator to protect access to DPI calibration constants and the calibration procedure If the calibration password is set to any number other than zero it is required before the user is allowed to calibrate the DPI or manually change the calibration constants IMPORTANT Document the calibration password as it is not retrievable from the DPI 1 The calibration password is from the Calibration Menu From the Main Menu press PREV until the Main Menu appears press Main F6 then Cal F3 2 Press the recessed CAL Button the front panel 3 Use the up and down arrow keys to highlight Access 4 Use the numeric keypad to enter the new calibration password Setting the calibration password to zero allows free access to DPI calibration and constants Press ENTER 5 Press Yes 4 to acknowledge changing the calibration password Press No F5 to reject changing the calibration password 4 2 2 TEST ACCESS PASSWORD The test access password allows the operator to protect access to DPI configuration and programs If the test access password is set to any number other than zero factory default it is required before the user i
26. aged or destroyed because electrostatic discharges at levels less than 4 000 volts cannot be seen felt or heard When the ESDS symbol appears between a paragraph number and paragraph title the entire paragraph and all subparagraphs shall be considered ESD sensitive When the ESDS symbol appears between a step number and the step test the step shall be considered ESD sensitive COMPRESSED GAS Use of compressed gas can create an environment of propelled foreign matter Pressure system safety precautions apply to all ranges of pressure Care must be taken during testing to ensure that all pneumatic connections are properly and tightly made prior to applying pressure Personnel must wear eye protection to prevent injury PERSONAL PROTECTIVE EQUIPMENT Wear eye protection approved for the materials and tools being used INERT GASES Operation of pressure equipment may be accompanied by the discharge of inert gases to the atmosphere The result is a reduction of oxygen concentration Therefore it is strongly suggested that exhaust gases not be trapped in the work are vi INTRODUCTION TABLE OF CONTENTS WARRANTY a T rado allinea ii COPYRIGHT NOTICE ripeto eat ate dert iii REVISION NOTICE el AIA iaia iv REVISION HISTORY ata SAFETY SUMMARY
27. ake in the edit field If the actual pressure applied is within the indicated tolerance the third calibration screen will appear MAINTENANCE 6 4 NOTE If the actual pressure is outside of the tolerance for the requested mid point pressure Error 222 Data out of range will occur Acknowledge this error by selecting OK F6 then re enter the actual pressure repeating step 2 1 if necessary Step 3 3 1 begin step 3 use the calibration standard to apply the 100 full scale 5 of full scale pressure requested by the DPI As pressure is admitted into the Test Port the measured pressure on the DPI s screen will change accordingly 3 2 When the measured pressure stabilizes use the DPl s numeric keypad OK F6 to enter the actual pressure reported by the calibration standard Do not enter the measured pressure reported by the DPI f necessary use the CLEAR key to correct a mistake in the edit field If the actual pressure applied is within the indicated tolerance the calibration complete screen will appear NOTE If the actual pressure applied is outside of the tolerance for the requested highpoint pressure Error 222 Data out of range will occur Acknowledge this error by selecting OK F6 then re enter the actual pressure repeating step 3 1 if necessary 6 4 1 2 Storing the Coefficients NOTE In addition to saving the calibration coefficients to the 5 memory the user is advised to separately re
28. ard on all Model 7000 DPI s Fused Quartz Bourdon Tube Technology Ruska s force balanced fused quartz Bourdon tube sensor makes use of the stability high elasticity low hysteresis and excellent fatigue strength of fused quartz This time proven technology eliminates the need for gear trains bearings shafts and other moving parts that can wear out or introduce hysteresis or deadband into the process Mercury Free All components in the DPI are mercury free This includes the temperature controller for the quartz Bourdon tube which is totally electronic NIST Traceability All DPl s are calibrated per ANSI NCSL ZX 540 1 1994 using Ruska deadweight gauges that are directly traceable to the National Institute of Standards and Technology NIST Universal Power Supply The DPl s universal power supply accepts AC voltages between 90 and 260 volts and DC voltages between 100 and 370 volts To reconfigure the DPI for use in another country the user simply changes the power cord Ho DPI s with ranges from 501 to 2500 psi can be either 115 230 VAC Please refer to Section 3 4 Friendly Display DPl s vacuum fluorescent display combines a bright low glare readout with a wide viewing angle During normal operation the measured pressure is easily visible from a distance of 10 feet 3 meters Adjustable Pressure Display The pressure display may be adjusted to show one decimal grater than or less than the default re
29. ation Sets CO for Gas Temperature Calibrates to Value Sets for Case Pressure Sets First Calibration Point Sets Second Calibration Point Sets for Oven Temperature Reads CO Cl Calibrates to Value Enable Calibration Edit Cal Button Required Turns Front Panel Display On Off Displays Message on Front Panel Sets Bar Graph Maximum off MEASure on CONTrol STATe Returns 0 Measure or 1 Control MODE MEASure CONTrol VENT MODE Returns Mode String SSTate lt n gt ON OFF 1 0 PROGram Sets Mode Set Opto 22 Module CATalog Returns List of Defined Programs SELected 5 5 REMOTE OPERATION program block gt DEFine DELete SELected ALL Deletes Programs NAME lt program name gt STATe RUN PAUSe STOP CONTinue 5 CONFigure RECall SAVE SENSE PRESSure RESolution lt number gt AUTO lt boolean gt ONCE MODE ABSolute DIFFerential GAGE RANGE UPPer LOWer REFerence HEIGht lt number gt MEDium N2 AIR SOURCE PRESsure LEVel IMMediate AMPLitude lt number gt AMPLitude MODE FIXed LIST TOLerance lt number gt SLEW lt number gt LIST PRESsure lt number gt lt number gt POINts DWEL1 lt number gt lt number gt POINts TOLerance lt number gt lt number gt POINts DIRection UPIDOWN COUNt lt number gt STATus OPERation EVENT CONDition ENABle lt nu
30. ble line is unasserted This method cannot be used on the serial interface 2 Issue the SCPI command SYSTEM KLOCK ON to lock the local keyboard The DPI will disable the local keyboard until the command SYSTEM KLOCK OFF is received 3 Issue the SCPI command DISPLAY ENABLE OFF or DISPLAY TEXT string These commands will disable the local display in addition to locking the keyboard The command DISPLAY ENABLE ON will restore the local display and keyboard operation Local operation may also be restored by turning the DPI off and back on REMOTE OPERATION 5 2 5 3 CONFIGURATION remote interface must configured before it is connected The remote interface is configured using the local interface The parameters needed vary with the interface used IEEE 488 Address Protocol RS 232 Baud Rate Data Bits Parity Stop Bits To configure the remote interface 1 remote interface is configured from the Setup Remote Menu From the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 and finally Remote F4 2 Use the up and down arrows to highlight the desired parameter 3 Use the numeric keypad to enter the address use the left and right arrows to change the other parameters The ENTER key must be pressed after entering the address 4 Repeat steps 2 and 3 to set all parameters needed 5 4 DEVICE MESSAGES 5 4 1 SCPI COMMAND FORMAT SCPI mnemonics have two forms l
31. bled in SRE occurs This bit is not used in SRE EBS Event status bit Set when an event enabled in ESE occurs MAV Message available Set when a response 15 ready to be sent Questionable status summary Set when an event enabled in QUES ENABLE occurs Error event queue not empty Reserved 0 Reserved 0 Standard Event Status Register ESR Standard Event Status Enable Register ESE Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Power on Set at power up Reserved 0 Command error Error in command syntax Execution error Error in command execution Device dependent error Device error independent of commands Query error Output queue empty when request received Reserved 0 Operation complete Set for OPC command Operation Status OPER EVENT OPER CONDITION OPER ENABLE Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 7 Bit 8 Bit 9 Bit 10 Bit 11 Bit 12 Bit 13 Bit 14 Bit 15 Calibrating Currently performing a calibration Settling Control setpoint has not been reached Reserved 0 Reserved 0 Measuring The instrument is actively measuring Reserved 0 Reserved 0 Self test in progress Volume leak test in progress Reserved 0 Reserved 0 Reserved 0 Reserved 0 Program running Reserved 0 Questionable Status QUES EVENT QUES CONDITION QUES ENABLE Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Voltage Is questionable Set when supply voltages are not within 5
32. card sized memory card through the front panel This allows the user to move test sequences from machine to machine and to easily upgrade software Additional Power Cords Additional power cords are available for most countries All options are summarized in Table 1 1 To order these items please contact Ruska Instrument Sales in the U S at 713 975 0547 Table 1 1 Options List for the Model 7000 DPI LabView Driver National Instruments Rack Mount Kit Cabinets 18 24 inches deep Rack Mount Kit Cabinets 24 30 inches deep 7000 904 Memory Card 35 403 Vacuum Pump 139 L min 115 VAC 50 60 Hz 99876 900 230 VAC 50 60 Hz 99876 960 Vacuum Pump 69 L min 115 VAC 50 60 Hz 99875 900 230 VAC 50 60 Hz 99875 960 Power Cord USA Canada Central Europe Power Cord India Japan Israel Power Cord Australia New Zealand Test Port Isolation Kit 110 VAC 7000 810 Test Port Isolation Kit 220 VAC 7000 820 1 Test port isolation kits are only required for 5 from 501 2500 psi 1 3 GENERAL INFORMATION THIS PAGE INTENTIONALLY BLANK GENERAL INFORMATION 1 4 SECTION 2 0 THEORY OF OPERATION 2 1 INTRODUCTION The DPI s power supply electronics and sensor combine to form a complete stand alone measure and control instrument This section of the manual describes the DPl s component modules Figure 2 1 and provides a general discussion of each Figure 2 1 DPI Block Diagram 2 2 POWER SUPPLY The DPI s universal p
33. ck for broken wires or a faulty sensor requesting service Section 7 if necessary B 1 APPENDIX B 531 Oven Temp Overrange Either the transistor drives heater for quartz Bourdon tube sensor Section 2 or the oven temperature sensor itself is malfunctioning To observe the oven temperature select OK then select MENU DISP Check the transistor and sensor for malfunction requesting service Section 7 if necessary 532 Vacuum Sensor Overrange Select OK then if absolute measurements are desired verify that the pressure applied to the case reference port is low enough to be considered vacuum Section 4 533 Case Pressure Overrange Select OK then reduce the pressure at the case reference port to 30 psia or lower 534 Voltage Sensor Overrange The 15 voltage provided by the control board Section 2 is incorrect To observe the voltage select OK then select MENU DISP Factory service Section 7 is usually required for this problem 535 Voltage SEnsor Overrange The 15 voltage provided by the control board Section 2 is incorrect To observe the voltage select OK then select MENU DISP Factory service Section 7 is usually required for this problem 536 Voltage Sensor Overragne The 5 voltages provided by the control board Section 2 is incorrect To observe the voltage select OK then select MENU DISP Factory service Section 7 is usually required
34. cord the calibration coefficients and store this backup in a safe place Step 4 Calibration is complete To exit the calibration procedure without storing the calibration coefficients in memory press CANCEL store the calibration coefficients in memory select OK F6 Step 5 Press PREV to return to the Main Menu Once the calibration procedure is complete the user should verify several pressure readings against the pressure standard If there are variances beyond the stated precision then an error was probably made in generating one of the calibration pressures and the calibration procedure should be repeated 6 5 MAINTENANCE 6 4 2 VACUUM NEGATIVE GAUGE CALIBRATIONS Vacuum mode is an available option The following configuration should be used when calibrating in the Vacuum Mode Figure 6 4 Vacuum Calibration To calibrate in vacuum mode with the configuration shown in Figure 6 4 the following actions should be taken The system pressure and vacuum inlet valve should remain closed The bottom side of the piston must be open to atmosphere and connected to the reference port of the DUT The test port of the DUT must be connected to the bell jar with a cutoff valve in line to isolate the Bourdon tube from the bell jar vacuum when drawing a hard vacuum to seal the bell jar and float the masses Once the masses have risen in response to evacuation of the bell jar close the reference vacuum cutoff valve and use the meter
35. d and the current required to keep the quartz Bourdon tube in its zero position is the main principle behind the operation of the DPI s sensing element Ideally this pressure current relationship would be a linear equation of the form where is current k is a constant of proportionality and P is pressure However due to certain mechanical characteristics of the helical tube and its supporting structure this pressure current relationship is slightly nonlinear The nonlinear portion of this pressure current relationship closely follows the form of a second order polynomial or aP bP where again P is pressure and a b and c are coefficients generated during the calibration procedure as discussed below When the user performs a three point calibration the DPl s software creates the three coefficients based on the user s zero mid point and full scale adjustments From then on the nonlinear term given above is subtracted from the total pressure current curve to achieve the desired linear pressure current relationship 2 5 4 AUXILIARY SENSORS Auxiliary sensors are the case reference pressure sensor and the oven temperature sensor These are reference sensors aligned at the factory and are utilized by the firmware which do not require calibration 2 5 4 1 Case Reference Vacuum Sensor The case reference vacuum sensor is a user installed option The user needs this sensor to zero the DPI and to monitor the case referenc
36. e vacuum fluorescent display If the calibration access code is enabled enter it at the prompt The first calibration screen will appear NOTE To exit the calibration procedure before the calibration coefficients have been Step 1 Step 2 changed press CANCEL any time during the procedure Canceling restores all previous calibration values 1 1 2 1 2 2 To begin step 1 of the calibration process select Zero Fl The zero procedure will start when the reading is in range and stable or when OK F6 is pressed Press OK F6 only if the zeroing conditions are stable The zero calibration will not be accurate if OK F6 is pressed when conditions are unstable Wait until the zero procedure finishes This may take several minutes When the DPI completes step 1 the calibration screen will appear On High Pressure Models pressure must be removed from the test port If zeroing in Absolute mode then the Test Port must be isolated To begin step 2 use the calibration standard to apply the 5096 full scale 5 of full scale pressure requested by the DPI As pressure is admitted into the Test Port the measured pressure on the 5 screen will change accordingly When the measured pressure stabilizes use the DPl s numeric keypad to enter the actual pressure applied by the calibration standard and then press OK F6 DO not enter the measured pressure reported by the DPI If necessary use the CLEAR key to correct a mist
37. e and type along with its polarity and magnitude Generally the source is simple to detect and is represented by the specific parameter The type is usually a function of the instrument s design and manufacturing process Within a given instrument an error can be either random or systematic as well as random or systematic within the instrument s population The user is free to consult Ruska for recommended methods of minimizing error source contributions In summation total error can and should be managed by the control of the three general error sources Input Specifications which includes the user s chosen calibration standards General Specifications which includes the users chosen processes and 1 APPENDIX A Performance Specifications which includes the user s chosen applications for the instrumentation The parameters and value limits listed in the following specifications indicate the product line s general acceptance limits and are not a report of any unit s specific error contribution Any parameter exceeding the specified limits should be considered in need of maintenance 2 SPECIFICATIONS GENERAL SPECIFICATIONS Pressure Range Display Electrical Power Operating Temperature Storage Temperature Humidity Nominal Control Volume Dimensions Zero Drift PERFORMANCE Display Resolution Hysteresis Pressure Medium Pneumatic Ports Overpressure Protection Standard Pressure Units GAS SPECIFICATIO
38. e in Differential instruments in Absolute mode It is the users discretion to calibrate this sensor 2 6 SOFTWARE The DPI is a digital software based instrument The software allows for user definable units and onboard programming 2 6 1 SOFTWARE SAFETY CONTROLS 2 7 THEORY OF OPERATION 2 6 1 1 Preventing Operator Errors The operator is required to verify a change to Control mode or Vent mode by pressing the Enter key 2 6 1 2 Oven Control The oven temperature is controlled via a pulse width modulated signal running at 300 hertz The time the heater 15 on can be varied from 0 to 100 The pulse width at startup is initialized to the previous value which was stored in battery backed CMOS RAM The oven control is a PID controller updated approximately every 7 seconds Figure 2 7 is accessed by pressing MAIN DISPLAY Figure 2 7 Auxiliary sensor display 2 6 1 3 Pressure Reading and Correction The sensor s analog output is processed by an analog to digital circuit that results in an output referred to as counts This output has to be corrected for the applied effects listed below The counts are linearized and the resulting pressure value is corrected for the variations in head pressure vacuum case effect and oven temperature effects The following equations are used by the control algorithm to adjust and correct the pressure signal Gain and Offset Corrected Counts 2 24 5 Linearized Counts
39. e is permanently evacuated and Son sealed at the factory and the Test Port connects to the case of the sensor Thus the test pressure is always relative to vacuum The Test Port is isolated from the Vent Port by a solenoid valve 5 02 that is closed when the DPI is in Measure mode or performing the zeroing process When the user commands the DPI to enter Vent mode 5 02 automatically opens and the pressure the Test Port is vented to ambient The Test Port is additionally protected by a relief valve RVO2 2 5 TRANSDUCER MODULE 2 5 1 QUARTZ BOURDON TUBE SENSOR TRANSDUCERO The quartz Bourdon tube sensor TRANSDUCERO 1 in Figure 2 2A is mounted in a machined aluminum housing The sensor consists of a helical quartz tube with a mirror fixed to one end as shown in Figure 2 5 A rigid beam is attached transverse to the axis of the helical tube Attached to both ends of this beam are electromagnetic coils Mounted beneath the coils are permanent magnets lamp assembly directs light through a sapphire window onto the mirror affixed to the helical tube as shown in Figure 2 6 The mirror reflects the light back through the window and strikes two identical photodiodes When there is zero pressure differential across the helical tube the photodiode assembly is mechanically adjusted so that the light spot is centered between each photocell In this zero position the outputs of the two photodiodes provide energy used to maintain the
40. ench or in a sturdy 19 rack Although the zeroing process will compensate for a slightly unlevel mounting the DPI should be mounted to within 5 of level 3 1 INSTALLATION TABLE 3 1 GENERAL SPECIFICATIONS GENERAL PARAMETERS Parameter Value Model Operating Humidity 5 95 RH noncondensing all Storage Humidity none all Operating Temperature 18 36 C all Storage Temperature 20 to 70 C all Electrical Power 90 260 VAC refer to Section 3 4 Power Consumption 150 W all Warmup Period lt 3 hrs all If there is any condensation when storing the DPI it must be thoroughly dried before power is applied 3 3 CAUTIONS The following cautions should be heeded at all times to ensure safe operation of the DPI 1 Never operate the DPI with the cover removed power supply has internal voltages near 400 volts 2 Never apply more than 110 of the DPI s full scale to the test port 3 Do not expose the instrument to thermal and mechanical shock or vibration This may affect performance and require rezeroing 4 See the safety summary in the introduction 3 4 POWERING UP THE DPI First plug the power cord supplied with the DPI into the power connector on the DPI s back panel NOTE Grounding for the DPI is provided through the power cord Next plug the power cord into a receptacle rated for any AC voltage between 90 and 260 volts If a different power cord is necessary for your recep
41. ers er MIL STD 859A user kPa x user defined user2 kPa x user defined kPa x 1000 0 hPa kPa x 100 2 3 3 Future models of the DPI may include an Option Board that plugs directly into the Control Board In the future this board could be used to provide nonstandard options 2 3 4 488 INTERFACE The 5 IEEE 488 GPIB interface card which plugs directly into the Control Board provides the DPI with an IEEE 488 interface This interface allows the user to automate the measurement and control processes 2 3 5 FRONT PANEL The Microprocessor Board and Control Board work together to interpret all input from the Front Panel The Front Panel contains the vacuum fluorescent display and rubberized keys used to operate the DPI e mm AE 3 3 The DPI also accepts an optional memory card that slides thorough a slot int he Front Panel and plugs directly into the Control Board 2 3 THEORY OF OPERATION 2 4 ELECTRONICS MODULE 2 4 1 MEASURE MODE PNEUMATICS Figure 2 2A Model 7000 DPI Differential Pheumatics Diagram The left half of Figure 2 2A summarizes the Measure Mode Pneumatics This block which is associated with measurement is described in Sections 2 1 4 1 1 through 2 4 1 3 of this manual 2 4 1 1 Reference Port For gauge measurements the Reference Port is left open to atmosphere For other differential measurements reference pressures from 0 to 15 psia inc
42. face transportation subjects the shipment to more frequent handling and much more intense shock In most cases if surface transportation is the mode of transport employed handling damage is likely Again it is essential that the procedures mentioned in Sections 7 1 through 7 3 be strictly adhered to in order to prevent any shipping and handling damage to the instrument 7 3 PREPARATION FOR STORAGE amp SHIPMENT THIS PAGE INTENTIONALLY LEFT BLANK PREPARATION FOR STORAGE amp SHIPMENT 7 4 APPENDIX SUMMARY OF SPECIFICATIONS A 1 ACCURACY Specifications of pressure transducer instrumentation can be divided into three categories Input Specifications General Specifications and Performance Specifications Each of these categories in turn consists of parameters that are usually specified by minimum and or maximum numeric limits Almost all of these parameters can have an effect on what is generally referred to as the instrument s accuracy Therefore the accuracy of pressure instrumentation can be varied either beneficially or detrimentally by controlling the Input Specifications operating within the General Specifications or knowing the actual Performance Specifications For example if Input Specifications have not been met for the line voltage the DPI may not have a catastrophic failure but errors be present in the transducer measurement As another example if the requirement for the pressure source Flow capacity has not
43. for this problem 538 Automatic Vent pressure has exceeded the limit specified in MENU SETUP LIMITS and the DPI vented the pressure 540 Mechanical Zeroing Needed The zero point of the quartz Bourdon sensor is beyond the range of the compensation circuit The zero is adjusted by the software but should be manually adjusted for complete accuracy 542 Oven Control Failure The temperature controller is unable to keep the sensor at the proper temperature 543 Supply Pressure Low Low supply pressure signaled from Opto 22 input 544 Gas Temp Not Installed requested function requires the optional gas temperature sensor 600 Factory Data Lost Internal factory constants have been lost Contact Ruska for more information 601 Calibration Mode The CAL button must be pressed before SCPI calibration commands can be executed 610 Memory Card Not Inserted A memory card must be inserted 611 Error Reading Memory Card The requested data was not found on the memory card 612 Error Writing Memory Card Unable to save information on card 613 Memory Card Write Protected Unable to save information on card 614 Data Not From This Unit The calibration data from another unit cannot be loaded APPENDIX B B 2
44. igid surface to the DPI Ruska has found that corrugated cardboard boxes provide the best packaging exterior The box must have an impact rating of 275 lb and be of double walled construction This type of box will sustain most types of damages incurred during the shipping and handling process but ensures that the contents remain intact and damage free The foam cradle ensures that a minimum of 3 inches of foam separates the inner surface of the box any portion of the DPI Wood or metal boxes do not absorb shock when dropped and therefore are not recommended If the original packaging and shipping materials have been retained use them for packing the DPI If the DPI is being packed for long term storage more than 30 days place a desiccant bag inside the box The DPI must be prepared for shipment in the following manner 1 Ruska Instrument has RMA procedure in place Please contact the Customer Service Center to obtain an RMA number prior to returning any equipment to Ruska Have the following information available when contacting Ruska 7 1 PREPARATION FOR STORAGE amp SHIPMENT the part number the serial number the purchase order number the billing and ship to address and the buyer s name and telephone number This information plus the RMA number must be attached to the unit when it is shipped to Ruska Instrument There will be a minimal charge for inspection and or evaluation of returned goods
45. ing valve on the bell jar to adjust the atmosphere until the masses begin to sink MAINTENANCE 6 6 When the masses are floating open the bell jar cutoff valve to the test port close the exhaust valve and use the pressure controller handwheel to adjust float position If the DPI s memory 6 4 3 EDITING THE CALIBRATION COEFFICIENTS is erased but the calibration coefficients are known the user can restore the coefficients to the DPI by following the directions below CAUTION Never randomly adjust the calibration coefficients Only qualified personnel with valid backup data should be allowed to edit the coefficients If the backup coefficients are questionable perform the calibration procedure in its entirety 1 Enter the calibration screen by selecting MAIN CAL 2 To edit the calibration coefficients press the recessed CAL Button beneath the vacuum fluorescent display If the calibration access code is enabled enter it at the prompt The first calibration screen will appear NOTE To exit the calibration procedure before the calibration coefficients have been changed press CANCEL any time during the procedure Canceling restores all previous calibration values 3 Use the up and down arrow keys to highlight CO C1 C2 or C3 The terms are coefficients of a linear regression analysis 4 Use the numeric keypad and the ENTER key to enter a new value To correct a mistake in the edit field use the CLEAR key
46. lay until stability is achieved Pressing OK F6 will bypass this wait period NOTE Bypassing this wait period can have a negative effect on the zeroing procedure 6 4 4 1 Gauge Only Instruments Verify that the Reference Port is open to atmosphere Enter the Calibration screen by selecting MAIN CAL Select Zero F1 Do not press the recessed CAL Button Do not disturb the instrument while zeroing is in process Pu e opel s Wait for the zeroing procedure to finish 6 4 4 2 Differential Instruments 6 4 4 2 1 Gauge Mode A differential instrument in Gauge mode is zeroed with the same procedure as a gauge only instrument See Section 6 4 4 1 For DPls with ranges from 501 to 2500 psi test port isolation valve is D standard For systems without this valve it is important to vent the DPI and 92 col verify that there is not a pressure source supplying gas into the DPI test port N before proceeding with the procedure outlined in Section 6 4 4 1 6 4 4 2 2 Absolute Mode A vacuum gauge should e installed for measuring the case reference pressure This gauge should be installed as close to the sensor as possible There is an 1 8 inch NPT fitting available for this installation near the DPI sensor 1 From the Main Menu verify that the unit is in the absolute mode of operation See Section 4 2 1 2 Enter the Calibration screen be selecting MAIN CAL Select Zero F1 Do not press the recessed CAL Button Appl
47. lized Refer to Section 6 4 4 Figure 6 5 Photocell Location MAINTENANCE 6 10 SECTION 7 0 PREPARATION FOR STORAGE amp SHIPMENT NOTE The procedures given in Sections 7 1 through 7 3 must be strictly adhered to in order to prevent damage to the instrument Failure to follow these procedures will likely result in damage to the DPI during shipment This damage is not covered by the carrier s insurance 7 1 DISCONNECTING THE DPI Relieve all pneumatic pressure from the DPI Turn the DPI power switch to the off position Disconnect the power cable from the DPI power receptacle Disconnect all pneumatic lines from the 5 back panel ED AS os 7 2 INSTRUCTIONS prevent shipping and handling damage to the instrument adhere to and strictly follow the instructions below The governing discipline in ensuring a damage free shipment is to ensure that the possibility of handling shocks to the DPI is minimized and or prevented during transit Ruska accomplishes this task by cradling the DPI within two foam cradles that are encapsulated within a double walled corrugated box The DPI is restrained and supported but still has resilience The materials used in the packaging operation are foams that have a minimum impact rating of not less than N 95 If polyfoam or rubber foam other than that used in the original packaging is to be used cut it into strips so that it will not present a large r
48. lusive may applied to this port The medium from the Reference Port first passes through a particle filter before it enters the Reference Port of the transducer module In addition the Reference Port is isolated from the Test Port and Vent Port by a solenoid valve SVO3 that is closed during the DPl s Measure mode When the user commands the DPI to perform the zeroing process automatically opens and the pressure on the Reference Port and Test Port become equal The Reference Port is protected by a relief valve RVO1 and a pressure sensor TRANSDUCERO2 used for measurements that are not referenced to atmosphere Additionally a temperature sensor TRANSDUCERO5 helps keep the quartz Bourdon tube sensor at 50 C S lt On Absolute Models there is no reference port 3 THEORY OPERATION 2 4 2 4 1 2 Port Test Port connects the DUT to the Pneumatics Module Test Port includes particle filter and a solenoid valve SVO1 that is open during the DPl s Measure mode and closed during the zeroing process On Differential mode DPls see Section 2 4 the pressure at the DUT also appears at the tube of the quartz Bourdon tube sensor TRANSDUCERO1 where it is compared to the pressure from the Reference Port and measured Ma 29 On High Pressure Models 501 2500 psi SVO1 is not present nce externally mounted valve is available as an option 2 On Absolute Models the Bourdon tub
49. mber gt QUEStionable EVENT REMOTE OPERATION Define Program 1 Dwelll Max1 Press2 Toler2 Read Program Definition Deletes Current Program Select Current Program Set Program State Read Program State Restore Saved Configuration Save Current Configuration Set Pressure Display Resolution Return to Default Resolution Returns DPI Full Scale Value in Units Returns Lowest Calibrated Value Set Gas Head Height Set Gas Medium Sets Pressure Setpoint Read Pressure Setpoint Set Source Parameter Set Specifies Output Tolerance Set Slew Rate Set List of Pressure Values Returns Number of Points Defined Specifies Dwell Times Returns Number of Dwell Times Specifies Tolerances Returns Number of Tolerances Direction to Go Through List Number of Times to Go Through List Read Clear Operation Event Register Read Operation Condition Register Set Operation Enable Mask Read Clear Questionable Event Register 5 6 CONDition ENABle lt number gt PRESet SYSTem DATE lt year gt lt month gt lt day gt ERRor KLOCk 10 TIME lt hour gt lt minute gt lt second gt VERSion LANGuage 6000 SCPI PRESet TEST ELECtronic PNEumatic PNEumatic LEAK LEAK VOLume VOLume STOP UNIT DEFine lt n gt lt noame gt lt number gt LENGth MM IN PRESsure lt unit name gt TEMPerature C CEL F FAR K 5 4 5 EXAMPLE SCPI COMMANDS Read Questionable Condi
50. nd down arrow keys to highlight Key click 2 Use the left and right arrow keys to select or off 4 2 5 ENABLE ERROR The enable error selection enables the out of range errors on the secondary transducers Normally the only secondary transducer installed is the temperature transducer 1 The enable error selection is set from the Setup User Menu Form the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 and then User F2 2 Use the up and down arrow keys to highlight enable Err 3 Use the left and right arrow keys to select on or off 4 2 6 DATE TIME The DPl s system clock is continuously updated even through power off and on 4 7 LOCAL OPERATION 1 date and time set from the Setup System Menu From the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 and then System F5 2 set the system date press Date F1 Use the numeric keypad to enter the current month date and four digit year mmddyyyy All digits must be entered Press ENTER to accept 3 To set the system time press Time F2 Use the numeric keypad to enter the current hour minute and second hhmmss All digits must be entered Press ENTER to accept 4 3 MEMORY CARD The DPI supports the user of a PCMCIA memory card to store setup calibration and program information This provides the ability to save the current setup of the system for later re
51. nder test DUT taking into account the density of the test gas e g air or nitrogen Choice of Medium Although the is not sensitive to the type of gas used within the system the user can select either instrumentation air or nitrogen allowing the DPI to automatically make pressure head corrections Choice of Display Units Standard units include inHg at 0 C and 60 F kiloPascals bars pounds per square inch inH O at 4 C 20 C and 25 C kilograms per square centimeter mmHg cmHg at 09 and cmH O at 4 C Altitude and airspeed units include feet meters knots and kilometers per hour In addition to these predefined units four user defined units are programmable Communications Interface The DPI includes standard RS 232 serial and IEEE 488 interfaces The user s computer communicates with the DPI through the Standard Commands for Programmable Instructions SCPI protocol The DPI can also be contigured to accept existing software written for the Ruska Series 6000 Digital Pressure Gauge Indicator 1 4 STANDARD EQUIPMENT amp OPTIONS A standard DPI includes this manual a power cord and a small tools kit Although the standard DPI is fully functional with just these items and the appropriate pressure and vacuum supplies the following options are also available Rack Mount Kit This 6 969 kit meets ANSI EIA requirements for a 4U 19 rack mount kit GENERAL INFORMATION 1 2 Memory DPI accepts credit
52. ong and short The short form is all in capital letters The long form is the entire mnemonic Commands may use either the short form or the entire long form No other forms are accepted SCPI ignores case uppercase and lowercase are equivalent A SCPI command is made by following the command tree as presented in the command summary Each level adds a mnemonic to the command separated by colons Mnemonics enclosed in square brackets are optional and may be omitted Some mnemonics are followed by an optional numeric suffix If omitted the suffix defaults to 1 Multiple commands may be placed in a single message separated by semicolons Each command starts at the same level of tree where the last command stopped unless the command starts with a colon The first command in a message and any commands starting with a colon start at the root of the command tree IEEE 488 2 commands may occur between SCPI commands without affecting the tree level Command parameters are separated from the command name by one or more spaces Multiple parameters are separated by commas SCPI accepts numeric parameters with optional sign decimal point and exponent OFF is equivalent to zero and ON is equivalent to one Floating point numbers are rounded to the nearest integer for commands accepting integer values only A message is terminated by a line feed hexadecimal Carriage returns tabs and other control characters are ignored 5 3 REMOTE
53. orts to have original suppliers make good their warranties 1 INTRODUCTION COPYRIGHT NOTICE Copyright 1997 by Ruska Instrument Corporation All rights reserved This document may not be reproduced in part or in whole without the express written consent of Ruska Instrument Corporation DISCLAIMER No representations or warranties are made with respect tot he contents of this user s manual Further Ruska Instrument Corporation reserves the right to revise this manual and to make changes from time to time in the content hereof without obligation to notify any person of such revision TRADEMARK NOTICE ee RUSKA is a registered trademark of Ruska Instrument Corporation Trademarks or tradenames are subject to state and federal laws concerning their unauthorized use or other infringements The fact that the product marks or names in this manual do not bear a trademark symbol DOES NOT mean that the product name or mark is not registered as a trademark or tradename Any queries concerning the ownership or existence of any trademarks or tradenames mentioned in this manual should be independently confirmed with the manufacturer or distributor of the product jii REVISION NOTICE RELEASE DATE OF NUMBER REVISION RELEASE DESCRIPTION 7000 1D01 ace 10 13 00 Changes in Section 7 2 per DC RO 22781 iv INTRODUCTION REVISION HISTORY RELEASE 7000 1D01 Revision A 02 11 99 Original release RELEASE 7000 1D01 Revi
54. ower and remove the instrument cover See Section 6 3 2 2 Remove the processor card by removing one screw and gently rocking the card upward 3 Holding the processor card remove the battery the round silver object by carefully pulling on the battery 4 Plug in a new battery RIC 74 720 5 Reinstall the processor card and the screw Replace the instrument cover 6 The time and date may have to be re entered See Section 4 5 6 6 3 6 MEMORY CARD BATTERY Some versions of the optional memory card require a replaceable battery RIC 724 715 This battery should be replaced least once a year The Centennial Recharge Card uses a rechargeable battery This card should be plugged into a powered on instrument at least once every four to five months for ten hours This will keep the battery charged 6 4 CALIBRATION To keep the DPI operating within its specified precision the calibration procedures described below should be performed every 180 days After gaining history for specific DPIs they may be calibrated once a year If a higher level of overall performance is desired the user can calibrate more frequently NOTE The calibration procedure automatically generates coefficients that are stored in memory on the DPI s Control Board Section 2 3 1 If these constants are lost for any reason the calibration procedure must be performed regardless of the last calibration date If the calibration coefficients have been recorded
55. ower supply accepts AC voltages form 90 to 260 volts at 47 63 Hz and DC voltages from 100 to 370 volts This triple output supply products 5 VDC 12 VDC and 12 VDC which are distributed to the Control Board 2 1 THEORY OF OPERATION 38 DPI s with ranges from 501 to 2500 psi are either 115 or 230 VAC See Section 3 4 2 3 ELECTRONICS MODULE 2 3 1 CONTROL BOARD The Control Board monitors every major component of the Electronics Module The Microprocessor Board the Option Board the IEEE 488 Interface and the optional memory cards all plug into the Control Board The Sensor Board and Front Panel both communicate with the Control Board via ribbon cables The three voltages produced by the Power Supply are distributed to the Control Board where they are conditioned to produce four additional voltages of 5 VDC 5 VDC 15 VDC and 15 VDC for analog use The resulting seven DC voltages are then used either directly or indirectly throughout the entire DPI Data that is subject to change after the DPI leaves the factory are held in electrically erasable programmable read only memory EEPROM on the Control Board This includes the current units of measure the coefficients from the zeroing process the current pressure medium calibration coefficients and the conversion factors for the four user defined units of measure These values are used by the Microprocessor Board as described below The Control Board also holds the OPTO
56. ps describe this process CAUTION The DPI should only be opened by qualified electrical mechanical service technicians Lethal voltages are present and exposed in the power supply and display NOTE The sensor MUST have zero differential between the Test port and Reference port For Differential DPls apply atmospheric pressure to both the Test and Reference port For Absolute DPls apply a vacuum to the Test port 200 uHg 1 Remove the 5 top cover and sensor housing covers 2 Enter the Display screen by selecting MAIN DISP 3 Referring to Figure 6 5 slightly loosen the Allen screw on the back of the sensor bracket making sure to maintain a snug fit on the screw Using the T shaped Photocell Centering Tool RIC 2600 88 adjust the photocells by placing the tool in the hole in the bcvk of the sensor and turning the tool slightly Adjust for a pressure counts reading of O 100 the reading is found in the left hand column next to the Test Port Pressure reading on the display DO NOT attempt to set the pressure value bottom center of display to zero 4 Tighten the Allen screw 5 Tap on the bracket with a screwdriver handle to relieve mechanical stress Continue to tap on the bracket until the counts stop changing 6 9 MAINTENANCE 6 Repeat this procedure as necessary Di Reinstall sensor housing and instrument covers 8 Perform a normal instrument zeroing procedure After the unit has become thermally stabi
57. pt the name 4 Use the numeric keypad to enter the conversion factor and press ENTER to accept 5 Press PREV to return to the Units Menu The new unit definition may be selected 4 1 4 CHANGING THE NUMBER OF DECIMALS Each unit has a default number of decimal places used for pressure display This may be adjusted up or down by one decimal place 1 The decimal digits are set from the Setup User Menu From the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 and then User F2 2 Press the down arrow key until the label Display digits is highlighted Use the left and right arrow keys to change the number of decimal digits 4 Press PREV to the menu Press CANCEL to return all edited fields to their original values 4 1 5 SETTING THE ALARM LIMITS The DPI continually checks the measured pressure against high and low limits If the measured pressure exceeds the high limit or falls below the low limit an alarm is generated alarm limits are set from the Setup Limits Menu From the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 and then Limits F1 2 Press the up and down arrow keys to highlight the desired limit 3 Use the numeric keypad to enter the new value 4 Press ENTER to accept the new value 5 Default 1 F2 and Min place standard values for the filed into the numeric scratchpad 6
58. quartz assembly in its zero position thus a force balance is created 2 5 THEORY OF OPERATION As pressure is applied the helical tube the entire apparatus attempts to rotate This causes the mirror to move the reflected light spot to shine more on one photodiode than the other The Sensor Board see Section 2 5 2 then responds by changing the current to the electromagnetic coils that through interaction with the permanent magnets force the helical tube to return to its zero position The amount of current required to do this is proportional to the pressure applied across the helical tube Thus the pressure is determined by the amount of current required to return the helical tube to its zero position S On Absolute Models the process is similar except that the Bourdon tube is 2 permanently evacuated and sealed at the factory and the test pressure is VaoN applied to the sensor case With this configuration all test pressures are measured with respect to vacuum Figure 2 5 Shaft Magnet Section Figure 2 6 Photocell Light Spot THEORY OF OPERATION 2 6 2 5 2 SENSOR BOARD A temperature sensor and the quartz Bourdon tube pressure sensor are monitored by the Sensor Board which works with the Control Board to interpret pressure and temperature signals from these sensors and maintain the sensor housing at 50 C 2 5 3 LINEARIZATION TERM As described in the previous section the relationship between the pressure being measure
59. re Slew Rate units min CALCulate LIMit LOWer lt number gt Get Set Low Pressure Limit SLEW lt number gt Get Set Slew Rate Limit UPPer lt number gt Get Set High Pressure Limit VENT lt number gt Get Set Auto Vent Limit CALibration PRESsure DATE lt n n n n gt DATA REMOTE OPERATION Sets 0 C2 for Pressure Reads Coefficients 5 4 DATA2 lt n n n gt DATA2 VALuel number VALue2 lt number gt VALue3 lt number gt VALue4 lt number gt iZERO VALUE lt number gt INITiate INITiate Cal RUN STOP TEMPerature DATE lt number gt lt number gt VALue lt number gt PRESsure2 DATE lt number gt lt number gt VALue lt number gt VALue2 lt number gt TEMPerature2 DATE lt number gt lt number gt DATA VALue lt number gt MODE Calibration Edit Enabled MODE 0 DISP ENABle ON OFF 1 0 TEXT lt string gt BGRaph lt number gt OUTPut 5 ON OFF 1 0 Sets C4 C5 C6 for Vacuum Gauge Reads Coefficients Perform Mid Point Calibration Perform Full Scale Calibration Perform Vacuum Gauge Mid Point Calibration Perform Vacuum Gauge Full Scale Calibration Performs Zero Calibration Sets Vacuum Value Enter Zero Calibration Mode Status for Cal Pressure Temp Reference 0 Not Zeroing 1 Local Zero 2 Remote Zero Pressure Temperature Reference 1 of Range 0 Stable gt 0 Time until stable Start Zero Calibration Abort Zero Calibr
60. s allowed to change the limits LOCAL OPERATION 4 6 IMPORTANT Document the test access password as it is not retrievable from the DPI 1 The test access password is set from the Limits Menu From the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 and then Limits F1 2 Use the up and down arrow keys to highlight Access 3 Use the numeric keypad to enter the new access password Setting the test access password to zero factory default allows free access to DPI configuration and programs Press ENTER 4 Press Yes F4 to acknowledge changing the access password Press No F5 to reject changing the access password 4 2 3 BAR GRAPH MAXIMUM The bar graph on the Main Menu screen can be scaled to match the device under test by setting the full scale value of the bar graph 1 bar graph maximum is set from the Setup User Menu From the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 and then User F2 2 Use the up and down arrow keys to highlight Bargraph Max Use the numeric keypad to enter the bar graph maximum value in the current pressure units 4 Press ENTER 4 2 4 KEY CLICK The DPI can be configured to click each time a key is pressed 1 The key click is from the Setup User Menu Form the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 and then User F2 2 Use the up a
61. s are always terminated by a carriage return followed by a line feed The serial port also supports XON XOFF When XOFF hexadecimal 13 command is received the DPI will stop transmitting Transmission is restarted when the XON hexadecimal 11 command is received When only one unit is attached the Control C hexadecimal 03 command will clear the transmit and receive buffers and disable addressing When addressing is disabled the unit will respond to commands without being addressed 5 9 REMOTE OPERATION THIS PAGE LEFT INTENTIONALLY BLANK REMOTE OPERATION 5 10 SECTION 6 0 MAINTENANCE 6 1 INTRODUCTION Very little maintenance is normally required for the DPI This section of the manual discusses suggested procedures 6 2 OBSERVING THE SOFTWARE VERSION NUMBER Follow the steps below to observe the DPl s software version number 1 If necessary press PREV several times to return the display to the Main Menu 2 Select MAIN SETUP SYSTEM The software version number will appear on the screen 3 Press PREV to return to the previous screen 6 3 PREVENTIVE MAINTENANCE Although the DPI is designed to be nearly maintenance free occasional preventive maintenance is required to keep the DPI s performance optimal 6 3 1 INITIATING THE 5 SELF TEST To test the 5 hardware and software follow the steps below 1 If necessary press PREV several times to return the display to the Main Menu 2 Select MAIN TEST SELF
62. ses the conversion factors listed in Table 2 1 to translate the pressure from kiloPascals to one of the DPI s units of measure In addition to the predefined units offered in the Units menu there are four user defined units available 4 1 3 DEFINING A NEW PRESSURE UNIT In addition to the standard units of measure provided by the DPI four user defined units are available To create one of these units the user enters a name that is one to ten characters long and a conversion factor that is a multiple of kiloPascals kPa For example using the information from Table 2 1 the conversion factor for millitorr or one micron of mercury at O C is calculated as follows 1000 mTorr 1Torr 1 0 0 1450377 psi mTorr kPax m ImmHg0 C 0 0193368 psi thus the conversion factor simplifies to mTorr kPa x 7 5006051 1 The presure units are defined from the Units Define Menu From the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 then Units F3 and then Define F1 2 Press Next F2 until the desired user defined unit is highlighted 3 The following sequence is used to change the name of the selected unit LOCAL OPERATION 4 4 Use arrow keys to highlight the desired character the matrix b Press Add F3 to add the character to the name entry box Repeat a b until the desired name is entered Press Clear F4 to start over d Press Enter F5 to acce
63. sion B 10 13 00 Changes in Section 7 2 SAFETY SUMMARY The following are general safety precautions that are not related to any specific procedures and do not appear elsewhere in this publication These are recommended precautions that personnel must understand and apply during equipment operation and maintenance to ensure safety and health and protection of property KEEP AWAY FROM LIVE CIRCUITS Operating personnel must at all times observe safety regulations Do not replace components or make adjustments inside the equipment with the voltage supply connected Under certain conditions dangerous potentials may exist when the power control is in the off position due to charges retained by capacitors To avoid injuries always remove power from discharge and ground a circuit before touching it DO NOT SERVICE OR ADJUST ALONE Do not attempt internal service or adjustment unless another person capable of rendering aid and resuscitation is present RESUSCITAITON Personnel working with or near dangerous voltages shall be familiar with modern methods of resuscitation Such information may be obtained from you local American Medical Association ELECTROSTATIC DISCHARGE SENSITIVE PARTS SY CAUTION Electrostatic discharge sensitive ESDS is applied to low power solid state parts which could be damaged or destroyed when exposed to discharges of static electricity Maintenance personnel are often not aware that an ESDS part has been dam
64. solute The Main Menu can always be reached by repeatedly pressing PREV 4 1 1 SELECTING MODE OF OPERATION The DPI is offered as gauge only absolute only or differential type instruments 4 1 1 1 Gauge Only Instruments The mode of operation is selected from the Mode Menu From the Main Menu press Prev until the Main Menu appears press Menu F6 Mode F1 Select Absolute Gauge or Differential mode of operation NOTE On Gauge only instruments although gauge differential and absolute modes are selectable from the Mode Menu the instrument will have only been tested in the gauge mode 4 1 1 2 Absolute Only Instruments The only mode of operation available for this instrument will be the Absolute mode 4 1 1 3 Differential Instruments A differential 7000 is capable of operating in Gauge Absolute and Differential modes The mode of operation is selected from the Main Menu From the Main Menu select Absolute Gauge or Differential mode of operation 4 1 1 3 1 Absolute Mode The differential instruments are capable of operating in Absolute mode when the case reference is pulled down with a vacuum pump While zeroing a differential unit in the Absolute mode the user is prompted to enter the vacuum level of the reference pressure port The displayed pressure value is then corrected for the corrected for the vacuum pressure offset in the reference port See section 6 4 4 2 2 NOTE When operating a differential in
65. solution 1 1 GENERAL INFORMATION Ease of Operation intuitive menu driven interface makes the DPI easy to use Frequently used selections such as the units of measure are restored to memory each time the DPI powers up Easily Programmable 5 powerful microprocessor provides the basis for smart electronics With a few simple keystrokes the user can set limits on the system pressure create unique units of measure program a test sequence and more Modular Design The sensing element pneumatics electronics and user interface are separated into modules making maintenance faster and easier Attractive Desktop Packaging A sturdy aluminum case houses all of the DPl s electronics and user controls With the optional rack mount kit this standard 19 EIA chassis fits easily into a rack mount system Power On Self Test Upon power up the DPI quickly tests its hardware and software After the DPI completes this test the user can select more extensive self tests for the pneumatics and electronics Ease of Calibration three point calibration may be performed either remotely or entirely from the front panel disassembly is required and there are potentiometers to tune Automatic Zero Adjust At the user s request the DPl s software automatically performs the zero adjustment with no potentiometers to tune Automatic Head Correction The DPI automatically corrects for head pressure between the DPI and the device u
66. storation or loading into another DPI The calibration information is specific to the device and can only be loaded into the DPI from which it was saved The memory card also allows for future software firmware upgrades in the field 4 3 1 CARD SUPPORT The DPI supports static RAM cards conforming to PCMCIA Type specification 4 3 2 SAVING RESTORING SETUP INFORMATION To save the setup information to the memory card follow the procedure given below 1 Setup information is stored the Setup Systems Menu Form the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F5 and then System F2 2 Press Save F6 saved information includes the parameter entries from MAIN SETUP LIMITS MAIN SETUP USER MAIN SETUP UNITS and MAIN SETUP REMOTE 3i To restore information from the memory card press Main F6 then Setup F5 then System F2 and finally Load F5 4 3 3 SAVING RESTORING CALIBRATION INFORMATION Saving and restoring calibration information requires entry into Calibration mode 1 Enter the calibration mode by first pressing MAIN F6 and then Cal F5 2 Press the recessed CAL button on the front panel Pressing the CAL button enables the additional keys If the calibration access code is enabled enter it at the prompt 3 Press Save F6 to save the calibration data or Load F5 to restore the calibration data Calibration data may only be restored to the same DPI that saved it
67. strument with the case reference pulled down to a vacuum the operator must select the Absolute mode of operation in order for the instrument to correct the displayed pressure for the vacuum pressure offset 4 3 LOCAL OPERATION 4 1 1 3 2 Gauge Mode The differential instruments are capable of operating in the Gauge mode when the case reference is opened to atmosphere While zeroing a differential unit in Gauge mode if the internal reference pressure transducer measures the reference pressure outside of a 57 2 to 106 8 kPa range Out Of Range will be displayed in the ref PSI section of the zero screen The unit will not automatically zero if the case reference pressure is Out Of Range See section 6 4 4 and 6 4 4 2 1 4 1 1 3 3 Differential Mode The differential instruments are capable of operating in a Differential mode when the case reference is set anywhere from vacuum to 10 psig In the Differential mode no software limits exist on the case reference while the instrument is being zeroed See Section 6 4 4 and 6 4 4 2 1 4 1 2 SELECTING PRESSURE UNITS 1 pressure units are selected from the Units Menu From the Main Menu press PREV until the Main Menu appears press Main F6 then Setup F2 and then Units F3 The current units will be highlighted 2 Use the arrow keys to highlight the desired pressure unit 3 Press ENTER to accept the change Press PREV to exit without changing the units The DPI u
68. tacle consult Table 1 1 for available power cords GH The High Pressure DPI 501 2500 psi uses either 115V or 230 VAC D 2 solenoids Therefore there are both 115V and 230V models wy 3 available for these units Unlike other DPI models High Pressure NS DPIs do not allow for a wide range of power line voltages and must be ordered for the proper use INSTALLATION 3 2 Finally turn on the DPI by flipping the power switch the back panel The MEASURE screen will appear on the vacuum fluorescent display and the front panel will be fully operational 3 4 1 OBSERVING THE DPI S FULL SCALE RATING To observe the 5 full scale rating 1 Press PREV until the main menu appears 2 Select MAIN CAL DPI s full scale pressure rating FS will appear on the screen in the currently selected units of measure di To return to the main menu press PREV 3 5 PNEUMATIC CONNECTIONS 3 5 1 TEST PORT The device s under test is connected to the test port Excessive leaks in the test volume will cause measurement errors in the device under test Tubing connect from the test port to the load volume should have an internal diameter grater than 0 125 inches 3 mm Tubing should be shorter than 15 feet when minimum diameter tubing is used 3 5 2 REFERENCE PORT The reference port is open to atmosphere for gauge measurements 3 3 INSTALLATION Figure 3 1A Model 7000 Back Panel Figure 3 1B Model 7000 Absolute Back Panel I
69. tion Register Set Questionable Enable Mask Set System Date Returns lt error descr info gt Or 0 No Error Lock Keyboard Set System Time Returns 1991 0 Set Interface Protocol to 6000 or SCPI Reset System Perform Electronic Self Test State Pneumatic Self Test Return Status of Pneumatic Self Test Start Leak Test Get Leak Rate Start Volume Test Get Volume Abort Pneu Volume or Leak Define a Unit Set Length Units for Head Height Set Pressure Units Set Temperature Units To request the current pressure reading all of the following commands are equivalent MEASURE PRESSURE measure pressure MeASUrE pReSsUrE meas pres measure meas MEAS To set the control pressures setpoint to 50 all of the following commands are equivalent SOURCE PRESSURE LEVEL IMMEDIATE AMPLITUDE 50 SOUR PRES LEV IMM AMPL 50 0 PRESSURE 50 PRES 50 To zero the unit via the remote interface use the following sequence CAL ZERO INIT CAL ZERO INIT Enter Zero Mode Read Status Mode Pressure Temperature Reference 5 7 REMOTE OPERATION and Wait Stable CAL ZERO RUN Start Zero Adjust Sequence STAT OPER COND Wait Until Complete Bit 0 0 5 4 6 SCPI STATUS REGISTERS Status Byte Register STB Service Request Enable Register SRE Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Operation status summary Set when an event enabled in OPER ENABLE occurs Service request Set when an event ena
70. valid range For pressures check high and low limits 281 Cannot create program Program memory is full 282 Illegal Program Name The name specified is not valid or does not exist 284 Program Currently Running The command cannot be executed while a program is running 285 Program Syntax Error The syntax of the program definition is not correct 286 Program Runtime Error An error occurred while running the program Usually the setpoint is out of range 313 Calibration Data Lost The calibration data has been lost and the unit must be recalibrated 315 Configuration Data Lost The configuration data has been lost Check all parameters to be sure they are correct 330 Self Test Failed Check the display for the test that failed 350 Queue Overflow The error queue was full and messages were lost 400 Query Error A read request was received when there was nothing to read 500 Controller Malfunction Internal control failure 501 High Limit Exceeded The pressure was greater than the high limit 502 Low Limit Exceeded The pressure was less than the low limit 503 Slew Limit Exceeded The pressure changed faster than the slew limit allowed 521 Pressure Overrange The pressure reading is outside the range of the DPI 530 Gas Temp Overrange The temperature on the gas on the test line Section 2 indicates a bad connection of a faulty gas temperature sensor To observe the gas temperature select OK then select MENU DISP Che
71. y and display 1 Turn off the DPI and disconnect the power cord from the DPI 2 Locate and unscrew the two screws that secure the cover to the back panel 3 Place your hands near the middle of the cover and slide the cover towards the DPl s back panel 4 Lift up on the cover With the cover removed use typical electronic cleaning tools to remove any accumulated dust from inside the instrument 5 Replace the cover before resuming operation 6 3 3 MOISTURE FILTER The Bourdon tube sensor is hydroscopic An external desiccant filter prevents introduction of moisture and is strongly recommended for high humidity areas RIC 24 631 is suggested The filter should be replaced annually The moisture filter is used with the reference port only 6 3 4 VACUUM PUMPS Periodic checks of the user s vacuum pumps for oil levels and the correct operation of power down vacuum venting valves are recommended to ensure minimal changes of external oil contamination from the vacuum sources Periodic changing of vacuum pump oil as recommended by the vacuum pump manufacturer should also be done MAINTENANCE 6 2 6 3 5 PROCESSOR BATTERY The processor board uses a lithium battery to maintain time and date information This battery has a varying life If the instrument is left on 24 hours a day it may last 5 to 10 years If the instrument is stored it may only last one year Annual replacement is recommended To replace the battery 1 Turn off p
72. y vacuum to the case reference port Wait for the vacuum level to stabilize Select the desired pressure units using the F4 key Enter the vacuum level of the reference port and press OK F6 Do not disturb the instrument while zeroing is in process CONTON ee O Wait for the zeroing procedure to finish MAINTENANCE 6 8 GH For DPls with ranges from 501 to 2500 psi a test port isolation valve is not 2 standard For systems without this valve it is important to vent the and verify that there is not a pressure source supplying gas into the DPI test port NS before proceeding with the procedure outlined in Section 6 4 4 1 6 4 4 3 Absolute Instruments A vacuum gauge should be installed for measuring the test port pressure This gauge should be installed as close to the sensor as possible There is an 1 8 inch NPT fitting available for this installation near the sensor Enter the Calibration screen by selecting MAIN CAL Select Zero F1 Do not press the recessed CAL button Wait for the vacuum level on the test port to stabilize Enter the vacuum level of the test port and press OK F6 Select the desired pressure units using the F4 key Do not disturb the instrument while zeroing is in process E EE QE M Wait for the zeroing procedure to finish 6 5 SENSOR PHOTOCELL ZEROING If the error message Mechanical Zeroing Needed is displayed the sensor photocell must be zeroed The following ste

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