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RUSKA 7750i

Users Manual

2-6

Ps PR IMAR Y

S E NS OR

Qc PR IMAR Y

S E NS OR

CONTR OL

S E NS OR

CONTR OL

S E NS OR

PR E S S UR E

R E GULATOR

VACUUM

S UPPLY

PR E S S UR E

S UPPLY

Ps TE S T

POR T

Pt TE S T

POR T

VE NT

Ps APPLY

Pt E QUALIZE

VE NT

Pt TE S T

Ps TE S T

Pt APPLY

Ps R E LE AS E

Pt R E LE AS E

ZE R O

gme04.eps

Figure 2-3. RUSKA 7750i ADTS - Pneumatics Schematic Diagram

Go to Ground or Vent Procedure

The Go-To-Ground is implemented as a multi-step procedure:
a.

Control Ps to close to Atmosphere and Qc to zero at the current rate.

Measure actual atmospheric pressure.

Control Ps to measured atmosphere.

Open Ps Vent and Pt Equalize valves.

Содержание RUSKA 7750i

Страница 1: ...2010 2010 Fluke Corporation All rights reserved Printed in USA Specifications are subject to change without notice All product names are trademarks of their respective companies RUSKA 7750i Air Data T...

Страница 2: ...vice center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB Destination Fluke assumes no...

Страница 3: ...7750i Change Language Hold key for 5 seconds enter mode...

Страница 4: ......

Страница 5: ...in this Manual 1 2 General Information 1 3 Features 1 3 Fused Quartz Bourdon Tube Technology 1 3 NIST Traceability 1 3 Universal Power Supply 1 3 Measure While Control 1 4 Friendly Display 1 4 Adjust...

Страница 6: ...Sensor Board 2 9 Linearization Term 2 9 Software 2 9 Software Safety Controls 2 9 Preventing Operator Errors 2 9 Pneumatic Errors 2 9 Shut Offs 2 9 Oven Control 2 10 Pressure Reading and Correction 2...

Страница 7: ...nu Display Blank 4 21 5 Remote Operation 5 1 Capabilities 5 1 IEEE 488 5 1 RS 232 5 2 Remote Local Operation 5 2 Configuration 5 3 Device Messages 5 3 SCPI Command Format 5 3 SCPI Response Format 5 3...

Страница 8: ...g the Calibration Coefficients 6 7 Zeroing 6 7 Qc Channel 6 8 Ps Absolute Sensor VAC Level 6 9 Sensor Photocell Zeroing 6 9 Optimizing Control 6 12 Fan Operation 6 13 System Software Update Procedure...

Страница 9: ...1 Symbols 1 3 1 2 RUSKA 7750i ADTS Options List 1 5 2 1 Conversion Factors 2 3 2 2 Solenoid Valves States 2 4 3 1 General Specifications and Parameters 3 2 6 1 Electronics Self Test 6 2 6 3 RUSKA 775...

Страница 10: ...RUSKA 7750i Users Manual vi...

Страница 11: ...etup 4 9 4 9 Menu Menu Setup Limits 4 9 4 10 Airspeed Knots 4 11 4 11 Menu Menu Setup User 4 12 4 12 Menu Menu Setup Units 4 14 4 13 Menu Menu Setup Units Edit Name 4 15 4 14 Menu Menu Setup Remote 4...

Страница 12: ...RUSKA 7750i Users Manual viii 6 10 Auto Tune Screen 6 13 7 1 Packing the ADTS 7 3...

Страница 13: ...w fluke com To register your product visit http register fluke com To view print or download the latest manual supplement visit http us fluke com usen support manuals Safety Information Safety Summary...

Страница 14: ...s 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...

Страница 15: ...e mode the ADTS measures pressure It can be used to monitor barometric pressures vacuum systems and differential pressure devices The RUSKA 7750i has two full scale pressure ranges and two pressure co...

Страница 16: ...ronics and user interface are separated into modules making maintenance faster and easier Attractive Desktop Packaging A sturdy aluminum case houses all of the ADTS s pneumatics electronics and user c...

Страница 17: ...rack mount kit Lines and Fittings Kit This kit contains the pressure and vacuum lines and fittings to connect the RUSKA 7750i to the optional Fluke vacuum pump and to a gas bottle regulated with 1 4 N...

Страница 18: ...RUSKA 7750i Users Manual 1 6...

Страница 19: ...dules IEEE 488 DIGITAL CONTROL BOARD 2 BACKPLANE BOARD POW ER SUPPLY MICROPROCESSOR BOARD IEEE CARD FRONT PANEL AC POW ER PNEUMATICS Pt Test Port Supply Pressure Port Exhaust Port Pneum atics Qc M odu...

Страница 20: ...uses to translate the internal pressure unit of measure of kPa into the units selected by the user These factors are given in Table 2 1 Data that is subject to change after the ADTS leaves the factor...

Страница 21: ...rd The Digital Control Board plugs directly into the Back plane Board This board reads a high speed silicon strain gauge pressure transducer PDCR connected to the pressure generation point A digital c...

Страница 22: ...he Pneumatics of the ADTS Qc Reference The Reference side of the true differential Qc sensor is internally tied to the test port of the Ps sensor The Reference side of the Qc sensor is isolated from t...

Страница 23: ...ry of Operation Pneumatics Module 2 2 5 CONTROL SENSOR CONTROL SENSOR RELIEF SENSOR PRESSURE REGULATOR PRIMARY Qc SENSOR PRIMARY Ps SENSOR ZERO VALVE gme03 eps Figure 2 2 RUSKA 7750i ADTS Pneumatics M...

Страница 24: ...VENT Pt TEST Ps TEST Pt APPLY Ps RELEASE Pt RELEASE ZERO gme04 eps Figure 2 3 RUSKA 7750i ADTS Pneumatics Schematic Diagram Go to Ground or Vent Procedure The Go To Ground is implemented as a multi st...

Страница 25: ...l from the outer loop and uses this signal as the pressure set point The inner loop uses a high frequency response strain gauge sensor as its reference The frequency response of this transducer allows...

Страница 26: ...current required to return the helical tube to its zero position On the Absolute Ps sensor the process is similar except that the Bourdon tube is permanently evacuated and sealed at the factory and th...

Страница 27: ...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 On the RUSKA 7750i m...

Страница 28: ...e of the internal oven the ADTS will generate an Oven Control Failure error messages The operator can review the temperature and duty cycle of the oven by pressing the MENU MENU DISPLAY TEMP keys The...

Страница 29: ...sed 4 Valid High FSR Range 5 Valid Low FSR Range Kn0 Kn1 Kn2 Calibration constants for range 0 2 2 2 24 1 48 2 n K K K A A B n n Where A is the zero corrected counts 7 381 975 full scale of current ra...

Страница 30: ...RUSKA 7750i Users Manual 2 12...

Страница 31: ...t options 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 material...

Страница 32: ...than 120 of the ADTS s channel full scale as a pressure supply The pressure supply must be regulated and meet all of the criteria stated in Appendix A of this manual Never apply more than 110 of the A...

Страница 33: ...should have a minimum I D of 1 4 inch It is highly recommended to have vacuum lines with outside dimensions of 1 2 to 3 4 inch Additionally the length of the vacuum hose should be minimized for optimu...

Страница 34: ...RUSKA 7750i Users Manual 3 4...

Страница 35: ...ased on the screen of operation Referred to in this manual as F1 through F6 top key considered to be F1 bottom to be F6 3 Numeric keypad comprises Number keys with decimal point and change sign keys E...

Страница 36: ...nu Limits User Units Remote System Calibrate Zero Calibrate Zero All Self Remote Shop 1 Test Control Display Temp Vacuum Blank Set high low slew limits control mode control band and access code Set st...

Страница 37: ...3 Press the Menu function key to go to the Ps ONLY CHANNEL screen 4 Press the Mode key to toggle between Ps ONLY CHANNEL and Qc ONLY CHANNEL screens Go to Ground Go to Ground F2 function is used to co...

Страница 38: ...to toggle between the Ps Channel and the Qc Channel screens Ps Channel is recognizable by the dark blue background color and Qc Channel has a lighter background color Select Ps Channel to proceed wit...

Страница 39: ...rent units Note A different Unit of Measure can be selected for each channel of the ADTS Select the unit of measure for the Ps channel and then press the MODE key or the F6 Function key toggle to the...

Страница 40: ...between Step and Jog to switch between these modes press the function key 5 F5 In addition to using the keypad to enter a pressure set point the step function can also be used Using the rotary knob ro...

Страница 41: ...se see Chapter 4 Step Jog Entering Exiting Control Mode 1 The Control mode is set from either the dual channel or the single channel display screens For the Dual channel press PREVIOUS until the Main...

Страница 42: ...hlighted in the Step Jog the F5 key Using the rotary knob rotate the knob clock wise to increase the set point or counter clock wise to decrease the controller set point The scratchpad will be updated...

Страница 43: ...immediate affects the other channel Note Units of measure are selected for each independent channel The Setup Units is used to set up the user defined units of measure gme15 bmp Figure 4 8 Menu Menu...

Страница 44: ...ative and holds the pressure at a commanded set point This allows the system to hold the pressure at a set point within the control stability specification See Appendix A In addition to possible leaks...

Страница 45: ...upply Correction set to no 10 0 10 20 30 40 50 60 0 100 200 300 400 500 600 Airspeed Knots Altitude Feet Thousands 15 1000 ft 190 450 1 0 MACH gme17 eps Figure 4 10 Airspeed Knots Slew Rate User defin...

Страница 46: ...ible key click The step size bar graph max ready tolerance and gas head are defined separately for each channel All other entries are common for both channels Press MODE key to toggle between the Ps a...

Страница 47: ...millimeters mm for the head height entry 3 The head height is set from the Menu Menu Setup User From the Main Menu press PREVIOUS until the Main Menu appears press Menu F6 press Menu F6 then Setup F2...

Страница 48: ...e a key is pressed 1 The key click is set from the Menu Menu Setup User From the Main Menu press PREVIOUS until the Main Menu appears press Menu F6 Menu F6 then Setup F2 and then User F2 2 Turn the ro...

Страница 49: ...ry knob to change the character c Repeat steps a and b until the desired name is entered Press the Clear key to start over d Press the Done F6 key when the name change is completed gme20 bmp Figure 4...

Страница 50: ...updated If the date or time requires editing the following applies 1 The date and time are set from the Menu Menu Setup System From the Main Menu press PREVIOUS until the Main Menu appears press Menu...

Страница 51: ...ation 1 The calibration password is set from the Calibration Menu From the Main Menu press PREVIOUS until the Main Menu appears press Menu F6 Menu F6 then Calibrate F3 2 Press the Access F4 key If the...

Страница 52: ...e other screens are independent of the selected channel gme23 bmp Figure 4 16 Menu Menu Test Menu Test Self Test The ADTS can perform electrical and pneumatic self test to assist in trouble shooting p...

Страница 53: ...Test Shop1 The Menu Menu Test Shop1 menu of the system is used to display the current status of the various valve positions in the system This menu is primarily used for diagnostics and will be discu...

Страница 54: ...ans to set up the controller when control valves are replaced or to perform maintenance on the controller The menu is primarily used for diagnostics and repair shown in Figure 4 19 and will be discuss...

Страница 55: ...Display Vacuum This displays the current reading from the vacuum sensor that is used to zero the Ps sensor When railed to a high value it indicates 350 mtorr When the vacuum level present in the Ps se...

Страница 56: ...RUSKA 7750i Users Manual 4 22...

Страница 57: ...nstruments IEEE 488 The following identification codes define the interface capabilities of the ADTS Identification codes are described in the IEEE 488 standard SH1 Source Handshake Complete Capabilit...

Страница 58: ...an interface Most functions that can be 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...

Страница 59: ...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 stop...

Страница 60: ...nsor PRESsure ALT Altitude PRESsure CAS Airspeed PRESsure MACH Mach PRESsure PS Ps Pressure PRESsure QC Qc Pressure PRESsure PT Pt Pressure RATE ALT Altitude instant rate RATE CAS Airspeed instant rat...

Страница 61: ...ABORt Ps Abort dry mode INITiate Ps Initiate dry mode PRESsure ZERO ALL VACuum number Set maximum vacuum UNIT VAC INITiate Start Ps and Qc zero STOP abort zero calibration WAIT minutes seconds Set min...

Страница 62: ...nel display on off TEXT text display message on front panel PRESsure BGRaph number set Ps bar graph maximum PRESsure11 BGRaph number set Qc bar graph maximum OUTPut PRESsure MODE MEASure CONTrol VENT...

Страница 63: ...etpoint STATus OPERation EVENT read clear operation event register CONDition read operation condition register ENABle number set operation enable mask QUEStionable EVENT read clear questionable event...

Страница 64: ...registers always show the current status of the instrument Bits may turn on and back off between reads The status read is the status of instrument at the moment of the read Condition registers include...

Страница 65: ...ter STAT OPER Bit 14 Program running Bit 13 reserved Bit 12 reserved Bit 11 reserved Bit 10 reserved Bit 9 reserved Bit 8 Self Test running Bit 7 reserved Bit 6 reserved Bit 5 reserved Bit 4 Measuring...

Страница 66: ...ols Pressure to 20 000 FS Sample Program 1 7750 GPIB IEEE 488 Controls pressure to 20 000 FS include stdio h include stdlib h include string h include conio h include decl h int device GPIB Device des...

Страница 67: ...ite_7000 OUTP MODE MEASURE n check_errors Reset GPIB Interface ibonl device 0 check_errors display all GPIB and 7750 error messages return TRUE if any errors were found int check_errors void unsigned...

Страница 68: ...or input output strings double pressure Pressure read from unit int status Status register from unit int check_errors void int zero void void write_7000 char s void request_7000 char s void main void...

Страница 69: ...while status 1 0 gotoxy 1 9 cprintf Zero Complete return 1 check_errors display all GPIB and 7750 error messages return TRUE if any errors were found int check_errors void unsigned char status7 int re...

Страница 70: ...UEUE_SIZE buffer for input output strings double pressure Pressure read from unit int status Status register from unit int address int portbase int intnum volatile int transmit_enabled TRUE char inque...

Страница 71: ...0 break Reset 7750 to Measure mode OUTP MODE MEASURE Enter Measure mode write_7000_serial OUTP MODE MEASURE n check_errors Reset Serial Interface serial_close check_errors display all 7750 error messa...

Страница 72: ...00 Baud outportb portbase 3 3 8 Databits No Parity 1 Stopbit old_vector getvect intnum 8 Save old interrupt vector setvect intnum 8 serial_int Set new interrupt vector v inportb 0x21 Enable interrupt...

Страница 73: ...UEUE_SIZE 1 start clock while inq_in inq_out Wait for a character current clock if current start current CLK_TCK 86400 if current start TIMEOUT Check for timeout buffer i 0 return FALSE ch inqueue inq...

Страница 74: ...RUSKA 7750i Users Manual 5 18...

Страница 75: ...M The software version number will appear on the screen 3 Press PREVIOUS to return to the previous screen Preventive Maintenance Although the ADTS is designed to be nearly maintenance free occasional...

Страница 76: ...four 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 ADTS s back panel 4 Lift up on the cover With the cover removed use...

Страница 77: ...automatically generates coefficients that are stored in memory on the ADTS If these constants are lost for any reason the calibration procedure must be performed regardless of the last calibration da...

Страница 78: ...pending on which channel is being calibrated 8 To begin the calibration process press the Calibrate F2 button If the calibration access code is enabled enter it at the prompt The first calibration scr...

Страница 79: ...re applied by the calibration standard and then press ENTER Do not enter the measured pressure reported by the ADTS If necessary use the CLEAR key to correct a mistake in the edit field If the actual...

Страница 80: ...ode Remove all pressure sources from the system 2 Connect a vacuum standard to the Ps Port on the rear of the unit Pump the instrument down for at least 12 hours 3 If desired change the ADTS s units o...

Страница 81: ...evious calibration values 5 Use the rotary knob to highlight the coefficient to be edited The terms are coefficients of a linear regression analysis 6 Use the numeric keypad and the ENTER key to enter...

Страница 82: ...riod can have a negative effect on the zeroing procedure Qc Channel 1 Verify that the Ps and Qc sensors are close to atmospheric pressure 2 Enter the Calibration screen by selecting MENU MENU CALIBRAT...

Страница 83: ...TS can be zeroed at higher vacuum levels however the uncertainty of vacuum sensors tend to increase at higher vacuum levels therefore the uncertainty in the ADTS would also increase if zeroed at highe...

Страница 84: ...cket making sure to maintain a snug fit on the screw Using the T shaped Photocell Centering Tool part number 7750 111 adjust the photocells by placing the tool in the hole in the back of the sensor an...

Страница 85: ...erved it moving from tightening the Allen screw and now offset it in the opposite direction by this same width 11 Again tighten the Allen screw Now the width of the yellow line should be minimized 12...

Страница 86: ...Finally verify that the control is set to Normal to minimum overshoot see Chapter 4 Menu Menu Setup Control Band If the system continues to control improperly you can perform the Auto tune You will n...

Страница 87: ...he complete Auto Tune sequence If selected you are not required to run any of the other Auto Tune functions Press the enter key The ADTS with go through a sequence of controlling to various pressures...

Страница 88: ...th revision levels and the last two digits will increment upwards as the revision level increases e g 0R99 is older code than 1R01 which is older than 1R08 etc 1 Connect a PC to the RS 232 port on the...

Страница 89: ...With Coil Pt Test Valve 3961365 3915780 Pt Equalize Valve 3961365 3915780 Pt Apply Valve 3961352 3915780 Pt Release Valve 3961352 3915780 Table 6 3 RUSKA 7750i ADTS Replacement Parts List Description...

Страница 90: ...RUSKA 7750i Users Manual 6 16...

Страница 91: ...is minimized and or prevented during transit This is accomplished by supporting the ADTS between two foam cradles that are encapsulated within a double walled corrugated box The ADTS is restrained an...

Страница 92: ...er material Antistatic material is recommended 3 If the original shipping carton is not usable or available use a double walled corrugated carton with a 275 lb rating The recommended carton size is 25...

Страница 93: ...ortation Surface 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...

Страница 94: ...RUSKA 7750i Users Manual 7 4...

Страница 95: ...transfer standard There often is considerable confusion with the performance specification because different manufacturers use different terms to describe the performance characteristics of their ins...

Страница 96: ...n standard that was used by the manufacturer to calibrate the digital transfer standard This should be the expanded uncertainty of the calibration standard and include all sources of uncertainty that...

Страница 97: ...r Specification When the system is in control mode the control noise is defined as how close the controller can maintain the control pressure to the commanded set point In the active control mode the...

Страница 98: ...nHg 0 00039 inHg A 7 Two Sigma Expanded Uncertainty RSS 0 0055 RDG 0 0009 inHg RSS 0 0091 RDG 0 0009 inHg Table A 3 Uncertainty Analysis for a RUSKA 7750i 3 month and Yearly Calibration Uncertainty An...

Страница 99: ...G or 0 00085 inHg A 2 Span Stability 0 0019 of RDG 90 days 0 0075 of RDG year A 3 Zero Stability re zero at 8 hours 0 0009 inHg 0 0009 inHg A 4 Calibration Standard RUSKA 2465 or 2468 DWG Greater of 0...

Страница 100: ...0 in3 80 to 1000 cm Dimensions 7 in H x 16 5 in W x 19 in D 17 8 cm x 41 9 cm x 48 3 cm Weight 45 lb 20 kg Standard Pressure Units Engineering Units inHg at 0 C and 60 F kPa bar psi inH2O at 4 C and 2...

Страница 101: ...32 inHg a 5 0 0008 inHg 15 0 0013 inHg 30 0 0025 inHg 32 0 0030 inHg 40 inHg a 5 0 0009 inHg 15 0 0014 inHg 30 0 0026 inHg 40 0 0037 inHg 100 inHg a 5 0 0016 inHg 15 0 0019 inHg 30 0 0028 inHg 50 0 00...

Страница 102: ...ts Total Uncertainty 4 Engineering Units 32 inHg D 0 5 0 0005 inHg 16 0 0013 inHg 32 0 0026 inHg 68 inHg D 0 5 0 001 inHg 16 0 0016 inHg 32 0 0027 inHg 68 0 0055 inHg 1 Precision is defined as the com...

Страница 103: ...he command could not be executed due to the current state of the ADTS Some commands cannot be executed while a program self test or calibration is in progress 222 Out of Range The value is not within...

Страница 104: ...at the case reference port to 30 psia or lower 538 Automatic Vent 540 Mechanical Zeroing Needed The zero point of the quartz bourdon tube sensor is beyond the range of the compensation circuit The ze...

Страница 105: ...or Messages B B 3 Table B 3 Summary of Error Messages continued Value Description and Corrective Action 801 Error Reading Barometric RPT Pressure Sensor 802 Control Sensor Out of Range 803 Controller...

Страница 106: ...RUSKA 7750i Users Manual B 4...

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