Fluke RUSKA 7350 User Manual Download Page 1

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PN 3952249

November 2010

All product names are trademarks of their respective companies.

RUSKA 7350

High Pressure Gas Controller/Calibrator

Users Manual

Summary of Contents for RUSKA 7350

Page 1: ...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 7350 High Pressure Gas Controller Calibrator Users Manual ...

Page 2: ...rvice 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 risk for damage in transit Following warranty repair the product will be returned to Buyer transportation prepaid FOB Destination If Fluke determines that failure was caused by neglect misuse contami...

Page 3: ...e Equipment 1 2 Inert Gases 1 2 AC Main Plug Switch and Power Cord 1 2 Symbols Used in this Manual 1 3 Features 1 3 Mercury Free 1 3 NIST Traceability 1 3 Power Supply 1 3 Measure While Control 1 3 Friendly Display 1 3 Adjustable Pressure Display 1 3 Ease of Operation 1 4 Easily Programmable 1 4 Attractive Desktop Packaging 1 4 Power On Self Test 1 4 Ease of Calibration 1 4 Automatic Zero Adjust 1...

Page 4: ... 3 Installation 3 1 Introduction 3 1 Unpacking the RUSKA 7350 3 1 Cautions 3 2 Powering Up the RUSKA 7350 3 2 Pneumatic Connections 3 2 Drive Air Supply Port 3 2 Test Port 3 2 Gas Supply Port 3 2 4 Local Operation 4 1 Local Operation 4 1 Numeric Keypad 4 1 Function Keys 4 1 Rotary Knob 4 1 Cancel Previous 4 2 Tutorial 4 3 Selecting Language 4 5 Selecting Mode of Operation 4 5 Tare Mode 4 5 Triple ...

Page 5: ...ote Operation 5 1 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 ANSI IEEE 488 2 1987 Command Summary 5 4 SCPI Command Summary 5 4 Example SCPI Commands 5 6 SCPI Status Registers 5 7 6005 Interface Panel Emulation 5 8 Serial Operation 5 9 6 Maintenance 6 1 Introduction 6...

Page 6: ...f Lubrication 6 6 Lubrication Procedure 6 6 Fuse 6 6 Cleaning 6 6 7 Preparation for Storage and Shipment 7 1 Disconnection Instructions 7 1 Packing Instructions 7 1 Shipping Instructions 7 3 Appendices A Summary of Specifications A 1 B Summary of Error Messages B 1 ...

Page 7: ...v List of Tables Table Title Page 1 1 Symbols 1 3 1 2 RUSKA 7350 Options List 1 5 2 1 Conversion Factors 2 3 3 1 General Specification and Parameters 3 1 ...

Page 8: ...RUSKA 7350 Users Manual vi ...

Page 9: ... 4 11 4 12 Menu Setup Units Menu 4 13 4 14 Menu Setup Remote Menu 4 15 4 15 Menu Setup System Menu 4 15 4 16 Menu Program Menu 4 18 4 17 Menu Program Edit Menu 4 19 4 18 Menu Program Edit Auto Menu 4 20 4 19 Menu Program Edit Name Menu 4 21 4 20 Menu Program Edit Menu 4 22 4 21 Menu Program Config Menu 4 23 4 22 Menu Program Run Menu 4 23 4 23 Menu Test Menu 4 24 4 24 Menu Test Sweep Menu 4 25 4 2...

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Page 11: ...ing of pressure gauges transducers pressure switches and production pressure instruments In Measure mode the RUSKA 7350 measures pressure Typically measure mode finds applications in research laboratories testing of gauges and transducers How to Contact Fluke To order accessories receive operating assistance or get the location of the nearest Fluke distributor or Service Center call Technical Supp...

Page 12: ...iation Electrostatic Discharge Sensitive Parts W 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 damaged or destroyed because electrostatic discharges at levels less than 4 000 volts cannot be seen felt or...

Page 13: ...ercury free NIST Traceability All RUSKA 7350s are calibrated per ANSI NCSL Z 540 1 1994 using RUSKA deadweight gauges that are directly traceable to the National Institute of Standards and Technology NIST All instruments are provided with a NVLAP accredited calibration certificate Power Supply The RUSKA 7350s are either 100 120VAC 1PH 50 60 HZ or 220 240VAC 1PH 50 60 HZ Measure While Control The R...

Page 14: ...uired and there are no potentiometers to tune Automatic Zero Adjust At the user s request the RUSKA 7350 s software automatically performs the zero adjustment with no potentiometers to tune Automatic Head Correction The RUSKA 7350 automatically corrects for head pressure between the RUSKA 7350 and the device under test DUT taking into account the density of the test gas Choice of Medium The Pneuma...

Page 15: ...h the RUSKA 7350 through the Standard Commands for Programmable Instruments SCPI protocol In addition software written for the Series 7000 CALIBRATOR and Series 6000 DPG is fully compatible with the RUSKA 7350 Additional Power Cords Additional power cords are available for most countries of the world Table 1 2 RUSKA 7350 Options List Option Part Number Communication Software Contact Fluke User s M...

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Page 17: ...o produce four additional voltages of 5 VDC 5 VDC 12 VDC and 12 VDC for analog use The resulting seven DC voltages are then used either directly or indirectly throughout the entire RUSKA 7350 Microprocessor Board All of the RUSKA 7350 s software resides in nonvolatile programmable read only memory Flash EPROM on the Microprocessor Board which plugs directly into the Control Board This software con...

Page 18: ...ches communicate with this board through cables The Processor Board also supports the RS 232 serial interface which allows the user s computer to communicate with the RUSKA 7350 Electronic Section PUMP SENSORS GEAR MOTOR AIR REGULATOR Pneumatic Section MICROPROCESSOR BOARD 76XX INTERFACE BOARD BACK PLANE BOARD DISPLAY KEY PAD PANEL IEEE CARD MOTOR CONTROLLER OPTION BOARD DC POWER SUPPLY AC POWER A...

Page 19: ...D 859A user1 user defined kPa x User defined user2 user defined kPa x User defined Pa user defined Pascals kPa x 1000 0 FS user defined percent of full scale IEEE 488 Interface The RUSKA 7350 s IEEE 488 GPIB Interface Card which plugs directly into the Back Plane Board provides the RUSKA 7350 with an IEEE 488 Interface This interface allows the user to automate the measurement and control processe...

Page 20: ...I gld02 eps Figure 2 2 Pneumatic Diagram Pneumatic Pump The pneumatic pump is a positive displacement pump that precisely varies the system pressure by compressing and expanding system gas The pump is driven by a variable speed gear motor The pump has a position sensor that tracks the position of the pump plunger It has two travel limit switches at each end of its stroke Gearmotor The variable spe...

Page 21: ...y is specified as purchased 0 01 minimum the controlled pressure This transducer should be calibrated at a regular interval to maintain its stated accuracy Test Port The device under test is connected to this port This port is a 1 8 NPT female Drive Air Supply Port The supply air is connected to the drive air supply port The supply air should be 100 110 psi 7 7 5 bar The pneumatic side is protecte...

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Page 23: ...ncy Remove masking tape strings and packing materials from all components If possible save the packing materials for future use Finally install the Calibrator in a location that meets the requirements listed in Table 3 1 Note The RUSKA 7350 should not be subjected to mechanical shocks during installation or use It should be mounted on a rigid bench or in a sturdy 19 inch rack Although the zeroing ...

Page 24: ...o a receptacle rated for either 100 120 VAC or 220 240 VAC check name plate If a different power cord is necessary for your receptacle consult Table 1 1 for available power cords 3 Finally turn on the RUSKA 7350 by flipping the POWER switch on the back panel The MEASURE screen will appear on the color display and the front panel will be fully operational Pneumatic Connections Pneumatic connection ...

Page 25: ...ODE changes between modes of operation such as gauge and absolute MEASURE is used to place the unit into measure mode CLEAR key will clear the numeric entry field The ENTER key accepts the entered number or confirms a command Function Keys These are the six keys that run vertically beside the display The label shown in the display beside each key identifies their function These functions will chan...

Page 26: ...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 PREVIOUS key In the Main Menu screen the F2 key places the unit in Control mode ENTER must be pressed to actually enter the Control mode The F3 key places the unit in Vent mode This opens the test port to atmosphere and rapidly reduces the pressure ENTER is require...

Page 27: ...2 and all descriptions in this manual start from this point The double sized numbers in the top center of the display shows the current measured pressure 0 00 psi diff The upper left corner shows the current mode of the Calibrator MEASURE CONTROL or VENT The right side of the screen shows a bar graph displaying the current pressure relative to a user configurable full scale value Below the pressur...

Page 28: ...h Chapter 3 Pneumatic Connections section 4 From the Main Menu use the numeric keypad to enter the starting pressure The pressure is entered in the units set in the previous exercise As the pressure is entered each digit will be displayed in the numeric scratchpad the highlighted box in the lower section of the display If a mistake is made press the CLEAR key found in the numeric keypad and the nu...

Page 29: ...enu 9 Press ENTER to accept the new set point The Calibrator will move to the new set point 10 Press Measure key which is located in the key pad The Calibrator will change to Measure mode No confirmation is necessary to leave Control mode Selecting Language The RUSKA 7350 Calibrator can operate in a variety of different languages To select a different language press the Mode key two times MODE MOD...

Page 30: ...e key pad or from a top level function key Less commonly used set up type functions are accessible through the menu function key gld09 bmp Figure 4 7 Main Menu Controlling Pressure The Control F2 function key is used to place the Calibrator into the Control Mode A pressure set point should be entered into the Calibrator prior to placing the unit into the control mode This is to assure that the ope...

Page 31: ...rdinal point The operator can then read the higher resolution Calibrator to determine the actual pressure value when the mechanical gauge is indicating a cardinal point The Step Jog F5 key toggles between Step and Jog to switch between these modes press the function key 5 F5 Stepping Assure that the word Step is highlighted in the Step Jog F5 Using the rotary knob rotate the knob clock wise to inc...

Page 32: ... functions This accesses the Setup Calibration Program Test and Display functions gld10 bmp Figure 4 8 Menu Menu Setup Setup is used to configure the system It includes setting all of the limits user parameters user defined units of measure remote interface and system setup gld11 bmp Figure 4 9 Menu Setup Menu ...

Page 33: ...user that they have entered a set point that is greater than the high pressure limit In control mode if for any reason the pressure exceeds the user defined limit it will change into the measure mode and again display an error message to the operator informing them of the error that occurred This value can be edited using the rotary knob to highlight the High Limit Then enter the new value using t...

Page 34: ...essure will not be at a cardinal set point When the Control Off Band and Control On Band are set to zero the Calibrator operates in the Active control mode Setting a Control On and Off Band places the Calibrator in the Passive control mode The Control On and Off Band provides a tolerance around the pressure set point in the current unit of measurement The Controller will control the pressure to th...

Page 35: ...w rate to less than 25 of full scale to improve on control overshoot characteristics Slew Limit The slew limit is used by the system to assure that the slew rate is not exceeded If the slew rate is exceeded the Calibrator will change from the control mode to the measure mode and it will generate an error message to the operator Access The test access password allows the user to protect access to C...

Page 36: ...cts for head pressure 1 The Pressure Reference Line on the Calibrator is defined as the bottom of the color display where the display and the front panel join This provides the reference plane against which the device under test DUT pressure is measured 2 Determine the vertical distance between the Calibrator Pressure Reference Line and the reference plane of the device under test 3 Press the Unit...

Page 37: ... and then press the ENTER key to select Key Click The Calibrator can be configured to emit a clicking sound each time a key is pressed 1 The key click is set from the Menu Setup User From the Main Menu press PREVIOUS until the Main Menu appears press Menu F6 Setup F2 User F2 2 Turn the rotary knob to highlight Key click and then highlight either On or Off 3 Press the ENTER key to select Menu Setup...

Page 38: ...to highlight the desired character in the matrix b Use the rotary 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 gld15 bmp Figure 4 13 Menu Setup Units Edit Name Menu 4 Use the rotary knob to highlight the desired user defined unit that has just been renamed 5 Use the ...

Page 39: ...CPI which is the standard interface 6000 to emulate the Series 6000 pressure controller and 510 to emulate the Model 510 pressure controller When using the SCPI interface the RUSKA 7350 will emulate the 7010 and 7215 series controllers Serial Interface Set Up The operator can set up the Baud Rate Data Bits Parity and Stop Bits for the Serial Interface Menu Setup System The System Menu identifies t...

Page 40: ...USKA 7350 will guide the operator through a menu driven calibration procedure identifying the pressures that should be supplied by a standard Following the calibration procedure the RUSKA 7350 calculates and saves its own coefficients The calibration coefficients are date stamped so the user can easily identify the last time the instrument went through a full calibration when the coefficients were...

Page 41: ...an include numbers upper case letters and the and symbols For example Exer 14 and FS test are both valid names Configuration Since a program will depend on the current setup of the Calibrator the current configuration is stored with the program the user should set the units limits control parameters etc to the desired values before creating a program Number of Set points Before entering the sequen...

Page 42: ...venly spaced steps the Auto option can be used to automatically generate the program However if any part of the sequence includes unevenly spaced steps or the starting and ending set points are not the same each step must be programmed individually In the example given at the beginning of the section Menu Program Storing a Sequence in Memory each step must be programmed individually since the star...

Page 43: ...sure step 7 Repeat steps 5 and 6 until the test sequence is complete The Tolerance Dwell time and Max time will default to the value programmed in the first program step and only need to be changed if a different value is desired for a particular step 8 It is often suggested that the last point in a calibration program is to vent the pressure to atmosphere This can be achieved by selecting the VEN...

Page 44: ...teps will be deleted and replaced with the automatically generated program 4 Press Edit F4 Since new was highlighted the Calibrator will create a new program and give a default name of NAMEnn where nn is a two digit number The Program editing screen will appear displaying the first step 5 Press Auto F3 gld20 bmp Figure 4 18 Menu Program Edit Auto Menu 6 Using the numeric keypad enter the values fo...

Page 45: ...screen will appear displaying the first step 4 Press Name F6 gld21 bmp Figure 4 19 Menu Program Edit Name Menu 5 Use the F4 and F5 keys to highlight a character 6 Turn the rotary knob to select the character from the character set 7 To correct a mistake press Clear F4 and return to step 5 8 Repeat steps 5 and 6 until the name is complete 9 Press Done F6 to store the contents of the scratchpad as t...

Page 46: ... the new step For example to insert a step between steps 3 and 4 move to step 4 Press Insert F4 6 To delete a step in the program first move to the step to be deleted then press Delete F5 7 When all changes have been made press PREVIOUS to return to the Named Programs screen The Calibrator automatically saves the changes that were made in the program Changing the Configuration Stored with a Progra...

Page 47: ...e of the program 10 Press Config F3 Save F1 The configuration of the Calibrator will be changed to the current settings and stored in the program s configuration Running a Program 1 Programs are run from the Program Menu From the Main Menu press PREVIOUS until the Main Menu appears press Menu F6 Program F4 2 Use the rotary knob to highlight the name of the program 3 Press Run F1 The program run sc...

Page 48: ...o the current set point Menu Test The Menu Test section of the system is used to perform a number of the diagnostic and tuning functions that are available with the RUSKA 7350 gld25 bmp Figure 4 23 Menu Test Menu Menu Test Sweep Test The sweep function can be used to automatically exercise the elastic sensing element of the device under test prior to performing a calibration For the Calibrator to ...

Page 49: ...ouble shooting potential problems Please refer to Chapter 6 Maintenance for more details Note In order to perform a pneumatic self test the supply port must be connected to a properly set supply pressure and the test port not open to atmosphere For absolute units a vacuum supply must also be connected to the exhaust port Menu Test Remote Test The Menu Test Remote section of the system is used to p...

Page 50: ...Remote Serial 1 Menu Menu Test Shop1 The 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 discussed further in Chapter 6 Maintenance gld29 bmp Figure 4 26 Menu Test Shop1 Menu ...

Page 51: ...lay The Menu Display is used to conveniently monitor most of the sensor output parameters It is primarily used for troubleshooting gld30 bmp Figure 4 27 Menu Display Menu Menu Display Blank This is used as a screen saver in the RUSKA 7350 ...

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Page 53: ...ard Codes Formats Protocols and Common Commands SCPI 1991 0 Standard Commands for Programmable Instruments Capabilities IEEE 488 The following identification codes define the interface capabilities of the RUSKA 7350 Their meaning is described in the IEEE 488 standard SH1 Source Handshake Complete Capability AH1 Acceptor Handshake Complete Capability T5 Talker L3 Listener SR1 Service Request Comple...

Page 54: ...350 always powers up in the local mode In remote mode the RUSKA 7350 is operated by a computer connected to 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 operations are being done In cases where full remote control is required the following meth...

Page 55: ...ted 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 of the root of the command tree IE...

Page 56: ...CALCulate LIMit LOWer number get set low pressure limit SLEW number get set slew rate limit UPPer number get set high pressure limit VENT number get set auto vent limit TARE VALue number get set tare value STATe ON OFF set tare using current pressure CALibration PRESsure Data POINts number of calibration constants VALue n returns cal constants label value VALue n number set calibration constant CA...

Page 57: ...Lected deletes current program ALL deletes all programs NAME program name select current program STATe RUN PAUSe STOP CONTinue set program state STATe read program state CONFigure RECall restore saved configuration SAVE save current configuration SENSE PRESSure RESolution number set pressure display resolution AUTO boolean ONCE return to default resolution MODE returns ABSOLUTE or TARE RANGE UPPer...

Page 58: ...uestionable enable mask PRESet reset condition flags SYSTem DATE year month day set system date ERRor returns error descr info or 0 No Error KLOCk ON OFF 1 0 lock keyboard TIME hour minute second set system time VERSion returns 1991 0 LANGuage 6000 SCPI set interface protocol to 6000 or SCPI PRESet reset system TEST ELECtronic perform electronic self test UNIT DEFine n name number define a unit LE...

Page 59: ... 0 Bit 5 Command Error Error in command syntax Bit 4 Execution Error Error in command execution Bit 3 Device Dependent Error Device error independent of commands Bit 2 Query Error Output queue empty when request received Bit 1 Request Control Always 0 Bit 0 Operation Complete Set for OPC command Operation Status OPER EVENT OPER CONDITION OPER ENABLE Bit 0 Calibrating Currently performing a calibra...

Page 60: ...d Warning Set whenever a command ignores a parameter Bit 15 0 6005 Interface Panel Emulation The RUSKA 7350 may be configured to emulate the IEEE 488 command set of the RUSKA Single Channel Interface Panel Models 6005 701 and 6005 761 See the Interface Panel manual for a description of the protocol The RUSKA 7350 emulation has the following differences 1 The RUSKA 7350 is always in remote mode Byt...

Page 61: ...d 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 When more than one unit is attached via the RS 485 multi drop interface an address sequence must be sent The Data Link Escape hex...

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Page 63: ...he Main Menu 2 Select Menu Setup System The software version number will appear on the screen 3 Press PREV to return to the previous screen Preventive Maintenance Although the RUSKA 7350 is designed to be nearly maintenance free occasional preventive maintenance is required to keep the RUSKA 7350 s performance optimal Initiating the RUSKA 7350 s Self Test To test the RUSKA 7350 s hardware software...

Page 64: ...g the RUSKA 7350 s Cover section 2 Remove the cover of electronic chassis located at the front right corner 3 Remove processor card by removing one screw and rocking upward 4 Remove battery a round silver object by carefully pulling on battery while holding card 5 Plug in new battery part no 4 725 6 Reassemble in reverse order 7 The time and date may have to be re entered See subsection Chapter 4 ...

Page 65: ...pter 4 Local Operation Verify and set the head pressure to zero in Menu Setup User Triple range only Verify the range to be calibrated is selected To change press the Mode Range F5 If desired change the RUSKA 7350 s units of measure See Chapter 4 to match those of the calibration standard To go to the Calibration screen select MENU CAL To begin the calibration process press MENU CALIBRATE CALIBRAT...

Page 66: ...e calibration standard to Apply the mid point pressure requested by the RUSKA 7350 As pressure is to be applied into the Test Port the Measured pressure on the RUSKA 7350 s screen will change accordingly 2 When the Measured pressure stabilizes use the RUSKA 7350 s numeric keypad and OK to enter the actual pressure applied by the calibration standard Do not enter the Measured pressure reported by t...

Page 67: ...n addition to saving the calibration coefficients to the RUSKA 7350 s memory the user is advised to separately record the calibration coefficients and store this backup in a safe place 7 To exit the editing procedure without storing the calibration coefficients in memory press CANCEL To store the calibration coefficients in memory select OK 8 Press PREV to return to the main screen Once the calibr...

Page 68: ...n error detection by the system software Lubrication Procedure The threaded portion of the pump plunger requires periodic lubrication The pump may be lubricated by either injecting the lubricant through the grease fitting located on the left side of the instrument or by applying the grease directly to the threads of the pump plunger Either way the power to the system should be removed when applyin...

Page 69: ...in principle behind a successful shipment is that of minimizing shocks This is accomplished by cradling the device within two boxes such that the RUSKA 7350 is restrained but still has resilience The two most successful materials for this purpose are rubber foam and flexible polyurethane foams W Caution Styrofoam poured foam in place mixtures and other rigid foams are not suitable Even polyfoam or...

Page 70: ...er barrier material Anti static material is advisable 3 Interior Carton size 30 x 30 x 30 inches Cover bottom and sides with no less than 3 inches of polyfoam Use four strips 4 to 6 wide and 50 to 60 long Arrange strips to cross each other inside carton Cover sides and top completely filling entire carton Tape carton closed 4 The Exterior Carton must be a double wall of corrugated or fiberboard bo...

Page 71: ...ns Fluke recommends using air freight for transportation Surface transportation subjects the shipment to more frequent handling and much more intense shock Again it is essential that the procedures mentioned in the packing instructions are strictly adhered to in order to prevent any shipping and handling damage to the instrument ...

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Page 73: ...nally if the RUSKA 7350 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 flexibility and control over his 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 err...

Page 74: ... not a report of any unit s specific error contribution Any parameter exceeding the specified limits should be considered in need of maintenance Specifications Pressure Ranges 0 6000 0 10 000 psia Accuracy 0 01 FS Resolution 0 001 FS or better Control Stability Typically 0 0075 FS Control Response 20 90 seconds controlling into a 15 cu in volume depending on full scale range and increment step siz...

Page 75: ... numbers for 115VAC and 230 VAC Fuse 6AT 250V Humidity 5 to 95 noncondensing Temperature Operating 5 C to 50 C 40 F to 122 F Storage 20 C to 70 C 4 F to 158 F Ingress Protection IP 20 Indoor use Altitude 2000m EMC EN 61326 Electrical Safety EN 61010 Pressure Safety Pressure equipment directive class Sound Engineering Practice SEP ...

Page 76: ...RUSKA 7350 Users Manual A 4 ...

Page 77: ...oes not exist 114 Header Suffix The numeric suffix for the command name is out of range 201 Remote Required Remote command conflicted with local interface Return local interface to main Menu 221 Settings Conflict The command could not be executed due to the current state of the Calibrator Some commands cannot be executed while a program self test or calibration is in progress 222 Out of Range The ...

Page 78: ...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 RUSKA 7350 538 Auto vent The Vent Limit was exceeded and the instrument entered Vent Mode 543 Supply Pressure The instrument is attempting to increase pressure and the pressure i...

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