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GE Infrastructure - GE Measurement & Control

1. een rt 3 1 Sa VIMEREARPANEL E 3 2 do TEST PORTS e cet 3 2 GETTING STARTED ud 3 2 3 5 BATTERY OPERATION 3 3 2251 INSTALLING THE BATEN area nale 3 3 3 5 2 LOW BATTERY INDICATION ia EX D b bets 3 3 3 5 3 CHARGING THE BATTERY lella 3 4 325 3 Battery hel eh ceo ls 3 4 30 92 Charging inthe P PE aes oi ROB o es 3 4 3 5 4 STORING THE BATTERY alleata 3 4 3 6 CONNECTING TEST PRESSURE 3 5 Jg 7 ori ille 3 5 SECTION 4 0 LOCAL OPERATION 4 5 4 6 FRONT PANEL 4 1 LOCAL DISPLAY MENU 4 2 MAIN EINE D 4 3 UPPER AND LOWER DISPLAY te ee 4 3 4 4 1 DISPLAY SETTINGS IN THE STANDARD MODE 4 3 4 4 1 1 Selecting Which Sensor To 4 4 4 4 1 2 Display a Rote of Chong 4 4 4 4 1 3 Changing Ranges on Tripled Range Sensor 4 4 4 4 1 4 Tare a Sensors Reading soo etre ent 4 5 4 4 2 DISPLAYING PRESSURE CORRECTED FOR FIELD ELEVATION IN THE AIRFIELD ODE satus a
2. APP ly 7 FSi 9 1 Edit h Enter actual Pressure Prl ed SE 6 Figure 4 24 Figure 4 25 Preparation 1 Verify that the PPI has been at a stable environmental temperature and that the PPI has been warmed up for a minimum of 30 minutes 2 If desired change the unit of measure see section 4 4 3 to match that of the standard 4 17 LOCAL OPERATION 3 Enter the calibration screen From the Menu press PREV until the Main Menu appears press the Menu F6 Cal F3 Cal F2 4 For Dual Sensor PPl s select the sensor to be calibrated press Cal A F1 to Calibrate sensor A or Cal B F2 for sensor B see Figure 4 24 5 If the user has invoked the password protection enter the password NOTE To exit the calibration procedure before the calibration coefficients have been changed press PREV multiple times Canceling restores all previous calibration values Step 1 1 1 Step one sets the zero on the Please refer to the zeroing section section 4 6 3 1 for details on zeroing methods 1 2 Enter the actual pressure that exist at the test port of the PPI 1 3 If the actual pressure applied by the standard is within the indicated tolerance the second calibration screen will appear Step 2 2 1 To begin step 2 use a calibration standard to apply 50 596 of the full scale pressure requested by the Apply Line o
3. 4 5 4 4 3 SELECTING PRESSURE UNIT OF MEASURE ee tenen ee 4 6 4 4 3 1 Defining a New Pressure Unit eremo d renean 4 7 rr 4 7 4 4 4 1 Changing High and Low Pressure Limits 4 7 4 4 4 2 Changing the Number of Decimals 4 8 4 4 5 PERFORMING A LEAR TEST Lauretana aaa 4 8 4 4 6 DISPLAYING A THREE HOUR TREND GRAPH 4 9 4 47 RELIEF VALVE TESTING toca UR cae CU UL dela OR p aga 4 9 SETTING UP A USER DEFINED 4 10 4 5 1 SELECTING USER PRORIDES tes rt Pet ctu lai 4 10 42 24 DEFINING PROFLE Sin Sica oo Ub taa 4 10 2 5 3 RENAMING A PROFILE e ad EI UO PLU Nequi trade 4 11 4 11 4 6 1 SETTING THE MODE OF OPERATION 4 11 4 6 1 1 Setting the PPI in a Standard or Airfield Mode 4 11 4 6 1 2 Setting the Gas Medium iunc eee stg a aede 4 12 4 6 1 3 Setting Up the Pressure Display Filter 4 12 4 6 1 4 Setting the Rate Update Coefficient 4 12 4 6 1 5 Setting the Rate Integration Coefficient 4 12 4 62 DISPLAY SETU P tite et e 4 13 4 6 2 1 Screen Saver Backlight Timeout 4 13 4 6 2 2 Display Contrast uc e sio 4 13 4 6 2 3 Key Click o oe t Hav 4 13 4 6 2 4 Calibration Password tec o c te es 4 13 4 5 2 5 O 4 14 4 6 2 5 1 Setting the System D
4. or the device at the other end of the cable In either case improper insertion or a defective connector could cause a power disturbance which could damage the or the connected device or cause the loss of stored calibration constants THEORY OF OPERATION 2 6 SECTION 3 0 PREPARATION FOR USE 3 1 INTRODUCTION This portion of the manual covers initial installation Front and rear diagrams are presented in Sections 3 2 and 3 3 Alternate power sources are discussed in Section 3 4 and battery operation is covered Section 3 5 Section 3 6 explains connecting a test pressure to the and Section 3 7 tells the user what to expect during the power up procedure 3 2 THE FRONT PANEL All indicators and function keys are provided on the front panel of the instrument as shown in Figure 3 1 DISPLAY KEY PAD FUNCTION KEYS 6 FULL SCALE TILT FEET PRESSURE LABEL Figure 3 1 The Front Panel 3 1 PREPARATION FOR USE 3 3 THE REAR PANEL All connections and interface options are accessible through the rear panel of the instrument see Figure 3 2 POWER SWITCH SERIAL RS232 INTERFACE PRESSURE TEST PORT POWER JACK BATTERY ENCLOSURE WITHOUT COVER IEEE 488 INTERFACE OPTIONAL Figure 3 2 The Rear Panel 3 3 1 TEST PORTS The following table defines the pressure connection fittings for the PRESSURE RANGE FITTINGS Up to 6000 psi 1 4 NPFT 6 001 psi to 10 000 psi 1 8 NPTF Above 10 000 ps
5. 2 From the Main Menu press PREV until the Main Menu appears press the Menu F6 Cal F3 Zero F1 3 For Dual Sensor PPl s select the sensor to be zeroed press Zero A F1 to zero sensor A or Zero B F2 for sensor B see Figure 4 22 4 Enter the actual pressure that exist at the test port a Use the left and right arrow keys to highlight the variable you wish to edit b Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value c Use the left and right arrow keys to increment to the next digit d Repeat steps b and c until the entire value is entered e Hit the Enter key to accept the entry 5 Press the PREV key multiple times to return to the main menu 4 6 3 1 2 Zeroing Absolute Mode Sensors When zeroing a with an absolute sensor there are three commonly used methods The method selected should be based on the pressure range and accuracy requirements of the PPI Method One Connect the test port of the PPI to a suitable standard and compare the two instruments at the lower pressure limit of the PPI The PPI would be zeroed to the reading obtained from the standard This is commonly used on PPl s with sensors that have a minimum pressure range that is greater than 0 psia i e a sensor with a defined pressure range of 0 4 to 19 psia should not be zeroed at a pressure less than the minimum pressure of 0 4 psia in this
6. Previous Key The previous key is used to move to the previous menu Selecting the previous key multiple times would move towards the main menu Figure 4 2 is a menu tree showing the relationship between all of 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 displayed on the front display To move towards the main menu press the PREV key 4 1 LOCAL OPERATION 4 22 LOCAL DISPLAY MENU STRUCTURE Upper Enters Upper Display Configuration Menu Display Set up Display Math Rate Function Select Range L Airfield Set Altitude and Air Temp for Airfield Reading Unit Set Display Unit L Define Define User Displayed Units Setup Set High amp Low Limit Display Resolution Leak Enters Leak Menu TT Graph Enters 3 Hour Trend Graph Lower Enter Lower Display Configuration Menu Configure User Profile Preferences User User Defined Profile 1 User2 User Defined Profile 2 User3 User Defined Profile 3 User4 User Defined Profile 4 Define Define Save a User Profile Configuration L Rename Rename User Defined Profile Menu Enter Menu Mode Set Standard or Airfield Medium Filter Rate Setup Set Display Timeout Contrast Keyclick Access L System Set Date Time Display Software Version Enter Calibration Menu Zero Enter Zero Menu Cal Ent
7. F1 or lower F2 and the display F1 2 Select the sensor to be displayed see section 4 4 1 1 e g Display set to Sensor A 3 Select the Active Range a Use the up and down arrow key to highlight Range A or Range B b Use the left and right arrow key to highlight the desired Active Range 4 Press the PREV key several times to return to the main menu The active range should now be displayed below the pressure reading on the main display LOCATION OPERATION 4 4 NOTE In order to change the active pressure range sensor the pressure as measured by that sensor must be open to atmosphere 4 4 1 4 Tare a Sensor Reading The PPI is provided with the capability to tare out a sensor reading This capability is used for a wide variety of purposes The most common would be to allow an absolute sensor to display the pressure in the gauge mode The other common application is to set the zero when two sensors are used to display a differential pressure As an example if the math function of A B was selected unless both sensors were reading the exact same pressure the result of subtracting these two sensor reading from one another would be a reading other than zero The Tare key can be used to zero the output between these two sensors To tare an absolute sensor for gauge readings 1 Open the test port to atmosphere the PPI should read barometric pressure 2 Select the Upper F1 or Lower F2 and then d
8. M KNOT KM HR MPA PA Set upper display pressure units Set lower display pressure units 5 4 5 SCPI COMMANDS To request the current pressure reading all of the following commands equivalent MEASURE PRESSURE measure pressure MeAsUrE pReSsUrE meas pres measure meas MEAS 5 4 6 5 STATUS REGISTERS Status Byte Register STB Service Request Enable Register SRE Bit 7 Operation status summary Set when an event enabled in OPER ENABLE occurs Bit 6 Service request Set when an event enabled in SRE occurs This bit is not used in SRE Bit5 EBS Event status bit Set when an event enabled in ESE occurs Bit 4 MAV Message available Set when a response is ready to be sent Bit 3 Questionable status summary Set when an event enabled in QUES ENABLE occurs Bit 2 Error event queue not empty Bit 1 Reserved BitO Reserved Standard Event Status Register ESR Standard Event Status Enable Register ESE Bit 7 Power on Set at power up Bit 6 Reserved 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 Reserved Bit 1 Reserved Bit 0 Operation complete Set for OPC command Operation Status OPER EVENT OPER CONDITION OPER ENABLE Bit 0 Reserved Bit 1 Reserved Bit 2 Reserved Bit 3 Reserved Bit 4 Measuring The instrument is actively measuring Bit 5 Reserved Bit
9. Relieve all pressure from the PPI Turn the power switch off Disconnect the power cable from the power receptacle Remove the battery or power supply from the power source enclosure on ue quin Be Plug or cap ports 8 2 PACKING INSTRUCTIONS The instructions below must be strictly followed in order to prevent damage to the instrument The main principle behind a successful shipment is that of minimizing shocks to the pressure transducers This is accomplished by cradling the device within a box such that the is restrained but still has resilience The two most successful materials for this purpose are rubber foam and flexible polyurethane foams Styrofoam poured foam in place mixtures and other rigid foams are not suitable Even polyfoam or rubber foam should be cut into strips so that it will not present a large rigid surface to the PPI Ruska has found that corrugated cardboard boxes provide the best packing The boxes sometimes arrive damaged but the contents are usually intact A minimum of 1 inch of foam should separate the inner surface of the box any portion of the PPI If the original packing and shipping materials were retained use them for packing the PPI If the is being packed for long term storage more than 30 days place a desiccant bag with the unit inside a plastic bag The PPI should be stored in a cool dry place with the battery or power supply removed 8 3 PREPARATION FOR SHIPMENT In ge
10. CONVERTER IEEE MODULE i A FIGURE 2 1 FUNCTIONAL DIAGRAM OF THE PPI THEORY OF OPERATION 2 2 starting edge of the transducer frequency signal starts 24 bit counter which counts the 20MHz clock and stops the counter on the first falling edge after a 0 1 second time interval The counter value will be approximately 20 MHz x 0 1 second or 2 million which gives an accuracy of 1 count in 2 million second counter counts the exact number of cycles of the transducer s output frequency within the same time interval The frequency is then determined as follows Frequency 20 signal counter crystal counter Pressure values are calculated every 0 1 second from the frequencies and voltage according to the equation and coefficients supplied by the manufacturer of the transducer Two pressure values are calculated every 0 1 second for dual sensor 5 with one frequency output per sensor Dual sensors with two frequency signals per sensor updates one pressure value in 0 1 second then the other This is due to the multiplexing required for four inputs See Appendix C for signal outputs of sensors The coefficients are empirically determined by the transducer manufacturer and the values differ slightly from one transducer to the next Ruska stores these coefficients in the main microcomputer s memory after the sensor is installed in the instrument The main microcomputer uses the polynomial equa
11. F2 and then Display F1 1 Use the up and down arrow keys to highlight Display 2 Use the left and right arrow keys to highlight which sensor sensor A or B to display or the mathematical relationship between A and B When selecting the sensor range the full scale of that sensor is displayed in current units of measure above the Display line Additionally if the sensor has the triple range option the three available sub ranges are shown below the Rate line The current range that the instrument is set to operate is highlighted To change the sub range of a sensor see section 4 4 1 3 3 Press PREV to return to the Main Menu 4 4 1 2 Display a Rate of Change To display the rate of pressure change the operator will turn the Rate from the off position to either the Min or Sec position The will then display rate of change on the selected sensor The rate is activated from the Upper or Lower Display Menu From the Main Menu press PREV until the Main Menu appears press either Upper F1 or Lower F2 and then Display F1 1 Use the up and down arrow keys to highlight Rate 2 Use the left and right arrow keys to highlight Min or Sec 3 Press PREV to return to the Units Menu 4 4 1 3 Changing Ranges on a Tripled Range Sensor Note this function is only available on units that were purchased with the triple range option The Active Range on a triple range sensor is selected as follows 1 Select the Upper
12. PPI while power is applied to either the PPI or the device at the other end of the cable In either case improper insertion or a defective connector could cause a power disturbance which could damage the PPI or the connected device or cause the loss of stored calibration constants IEEE 488 Interface All models of the accommodate IEEE 488 card This card is installed in the main board of the PPI Battery Operation All models of the PPI accommodate a NiMH battery This battery is easy to install and provides the user with over 8 hours of operation most circumstances Battery Charger This battery charger is specially designed to charge the sealed NiMH battery mentioned above VAC operation of the PPI will charge the battery in 2 3 hours CAUTION Chargers not designed to charge sealed NiMH batteries may lead to battery failure or reduce battery life GENERAL INFORMATION 1 2 Calibration Report In addition to the standard certificate of compliance calibration per MIL STD 45662 traceable to the National Institute of Standards and Technology NIST is available Carrying Case This soft sided case holds the PPI the power supply the manual two batteries the charger and small tools This case is padded to protect its contents and fits easily under an airplane seat Rack Mount Kit This rack mount kit is 7 high and can be used to mount the PPI in a standard 19 rack The ANSI EIA AS 310 C 77 standard refers to t
13. The switching voltage regulator located on the 5 main power board generates the various voltages required for system operation The input to the voltage regulator is the DC supplied by the voltage source A switching regulator is used because of its ability to efficiently generate several different voltages while producing very little heat This minimizes thermal disturbances to the sensor and maximizes battery life if a battery is being used as the voltage source The main output from the switching voltage regulator is the 5 VDC used by the microcomputer displays and other logic circuitry Two secondary outputs of and 12 VDC are used by the sensor reference voltage of 2 500 VDC is also reduced for the analog to digital A D converter on the main board 2 2 3 THE SENSOR s The available sensors have frequency output s for measuring pressure and temperature The PPI has two 24 bit A D inputs for voltage measurement and four inputs for frequency measurements and a high accuracy temperature compensated 20 MHz crystal oscillator as a reference There are two independent sets of counters to measure the four frequencies therefore more than two frequency signals require multiplexing 2 1 THEORY OF OPERATION MAIN POWER BOARD VOLTAGE SOURCE MAIN CPU BOARD HIGH VOLTAGE PRESSURE WATCHDOG KEYBOARD REGULATOR OSCILLATOR TIMER AND DISPLAY MICRO RS232 COMPUTER INTERFACE OPTIONAL ANALOG TO MEMORY PLUG IN DIGITAL
14. address 4 Repeat steps 2 and 3 to set all parameters needed REMOTE OPERATION 5 2 5 4 DEVICE MESSAGES 5 4 11 SCPI COMMAND FORMAT SCPI mnemonics have two forms long and short SCPI ignores case uppercase lowercase are equivalent The short form is shown in the summary and 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 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 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 t
15. calibration password Press No F5 to reject changing the calibration password 4 6 2 5 System Setup The system setup is used to view the current revision of software operating in the PPI and to view set the date and time Ruska Instrument Model Version 08012606 00 60 66 109 6881 2666 Time BE AE Time Figure 4 20 4 6 2 5 1 Setting the System Date and Time PPI s system clock is continuously updated even through power off and 1 The date and time are set from the Menu Setup System menu From the Main Menu press PREV until the Main Menu appears Press Menu F6 then Setup F2 and then System F5 2 To set the system date press Date F1 a Use the left and right arrow keys to highlight the variable you wish to edit The date format is month date and four digit year mmddyyyy All digits must be entered b Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value c Use the left and right arrow keys to increment to the next digit d Repeat steps b and c until the entire value is entered e the Enter key to accept the entry 3 To set the system time press Time F2 Use the numeric keypad to enter the current time All digits must be entered Press ENTER to accept a Use the left and right arrow keys to highlight the variable you wish to edit The time format is hour mi
16. functions Sensor A Full Scale 19 0000 FSi 6 zero 48 41 2000 BB 6 Cal 06 06 0000 BB 1 Edit 6 amanda Cal Caef Figure 4 21 There will be separate coefficients for each pressure sensor that is present in the PPI Additionally if a sensor is triple scaled then there will be a set of coefficients for each sub range 4 6 3 1 Zeroing Procedure The zeroing procedure is performed to correct for system zero shift and does not require a full calibration most important requirement for performing a valid zeroing procedure is to know what the actual pressure is at the test port Pressure gradients in the system must be accounted for when comparing the PPI to another standard to determine the zero reading NOTE When the sensor is calibrated using the calibration procedure see Section 4 6 3 2 a zero is performed in the first step of this procedure Therefore it is not required to perform this zeroing procedure prior to performing the full calibration procedure 4 15 LOCAL OPERATION 14 7258 psi 14 72904 psi 1 1 Enter Actual Pressure Eos zero A Zero B Figure 4 22 Figure 4 23 4 6 3 1 1 Zeroing Gauge Mode Sensors When zeroing a PPI with a sensor reference to atmosphere 1 Open the test port to atmosphere Assure that all pressure heads are accounted for in determining the actual pressure that exist at the test port of the PPI
17. perform air data measurements in units of Feet of Altitude and Airspeed in knots The second may be to perform pressure calibrations in units of inHg The user could set the up as an ADTS and then save this configuration under the name of ADTS The could then be set up to display pressures in units of inHg and saved as a profile named inHg To switch from the inHg mode to the ADTS mode from the main menu the operator would press the Profile F3 key followed by the user key the user labeled ADTS 4 5 1 SELECTING USER PROFILES After the user has defined a profile see 4 5 2 he can readily switch between various profiles To select a profile 1 From the Main Menu press PREV until the Main Menu appears 2 Press the Profile F3 function key 3 Press the function key below the user define profile that is desired 4 Press PREV to return to the previous Menu 160 6 inH205ec 27 15 Pair useri user User userd Undo Define Figure 4 14 4 5 2 DEFINING PROFILES To define a profile 1 Set up the PPI as desired by the operator 2 From the Main Menu press PREV until the Main Menu appears press the Profile F3 function key 3 Use the up and down arrow keys to highlight the name of the profile under which you wish to save the current configuration 4 Press the Store F2 function key 5 Press PREV to return to the previous Menu Figure 4 15 LOCATION OPERATION 4 10 4 5 3 RENAMING PRO
18. range from 0 2 to 2 seconds Tue gi Use the left and right arrow keys to increment to the next digit N Repeat steps 4 and 5 until the entire value is entered Hit the Enter key to accept the entry 4 6 1 5 Setting the Rate Integration Coefficient In addition to selecting the interval at which the rate display updates see 4 6 1 4 the user can also adjust the time it takes for the rate display to respond to a step change in the rate This feature can be used to smooth the rate reading and is called Rate Integration By adjusting the rate integration value the rate display can be made to respond to a step change in a rate in as quickly as 1 second Rate Integration set at 1 or as slow as 20 seconds Rate Integration set to 20 1 From the Main Menu press PREV until the Main Menu appears press Menu F6 and then Mode F1 2 Use the up and down arrow key to highlight Rate Integrate Hit the Enter key 4 Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value The rate integration can range from 1 to 20 seconds SI 5 Use the left and right arrow keys to increment to the next digit LOCATION OPERATION 4 12 6 Repeat steps 4 and 5 until the entire value is entered 7 Hit the Enter key to accept the entry When the Rate Integration is set to 3 the rate display takes about 3 seconds to match the change in
19. rate When this variable is set to 10 it takes about 10 seconds to match the same step change in rate Thus when a step change occurs in the rate a lower rate integrate value might cause the rate reading to instantly jump and therefore look noisy whereas with a higher integrate value the response is smoother NOTE The Rate Update and Rate Integration feature does not affect the displayed pressure reading it only effects the displayed rate value Response time on the pressure is almost immediate see Section 4 6 1 3 with filtering occurring for a very small change in pressure 4 6 2 DISPLAY SETUP The Menu Setup menu is used to set the display timeout display contrast key click and access password Click Access Figure 4 19 4 6 2 1 Screen Saver Backlight Timeout The display timeout defines the amount of time that must pass without a key selection on the PPI before to the backlight on the display turns off This function is used as a screensaver and to extend the battery life when operating by battery Setting this variable to 0 disables this function Hitting any key will turn the backlight on 4 6 2 2 Display Contrast The display contrast can be varied to improve viewing properties in various lighting conditions The user may want to vary the default value to develop the preferred contrast 4 6 2 3 Key Click The PPI can be configured to click each time a key is pressed The key click is set f
20. verification points are evaluated in order to assure that the calibration was performed properly and that the instrument is performing as expected NOTE In addition to saving the calibration coefficients to the 5 memory the user is advised to separately record the calibration coefficients and store this backup in a safe place 4 6 3 3 Triple Range Sensor Option For a PPI that includes the optional triple range calibration the calibration procedure is identical to the single range sensor calibration procedure except it will be performed three times one per sensor range At the beginning of the procedure the user will define which sensor range is being calibrated and then follow the menu driven calibration procedure The operator has the option of calibrating anywhere from one to all three of the sub ranges To perform a complete calibration of the PPI all three ranges would need to be calibrated 4 19 LOCAL OPERATION When performing calibration on a triple range sensor the user also has the option of selecting the number of pressure points they wish to include in the calibration sequence The default number of calibration points is 3 points up 0 50 and 100 and 1 point down 50 This should be all that is required on the typical pressure sensor Increasing the number of calibration adjustment points can increase the performance of the sensor The maximum number of calibration adjustment points that the operator ca
21. 1 3 If an error code should appear refer to Appendix A Error Messages 3 5 PREPARATION FOR USE THIS PAGE INTENTIONALLY LEFT BLANK PREPARATION FOR USE 3 6 SECTION 4 0 LOCAL OPERATION This section of the manual describes the operation of the Precision Pressure Indicator from the front panel The local interface front panel consists of a LCD display and a set of keys The display shows the system status and the menu options The keys are grouped according to function Sei gt rmm Figure 4 1 Model 7200 Front Panel 4 1 FRONT PANEL DISPLAY AND KEYS Display The 722X 723X is set up such that the display is separated into three primary sections This is the upper and lower primary sensor display sections able to accommodate displaying two sensors simultaneously and the function label section which is located on the lowest line in the display just above the six function keys Function Keys F1 through F6 keys are used to navigate the menus and performed 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 arrow keys select a field for editing and can be used to scroll through numbers in order to edit a numerical value such as a limit setting The left and right arrow keys select between multiple choice options for the selected field Enter Key The enter key accepts the entered number or confirms a command
22. 2 until the desired user defined unit is highlighted 3 The following sequence is used to change the name of the selected unit a Use the arrow keys to highlight the desired character in the matrix b Press Add F3 to add the character to the name entry box c Repeat a and b until the desired name is entered Press Clear F4 to start over d Press Enter F5 to accept the name 4 The following sequence is used to enter the conversion factor a Press the right arrow key until the conversion factor to be modified is highlighted b Press the Enter Key c Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value d Use the left and right arrow keys to increment to the next digit e Repeat steps c and d until the entire value is entered f Hit the Enter key to accept the entry 5 Press PREV to return to the Units Menu The new unit definition may be selected nizi4s6rgua ABCOEFGHI JKLM MOPBRSTUULIANE abcdefshiJklm lg Xr Figure 4 9 4 4 4 SET UP The set up menu is used to define pressure limits and to define the display resolution 4 7 LOCAL OPERATION 4 4 4 1 Changing High and Low Pressure Limits The operator can store a High and Low pressure limit into the PPI When these limits are exceeded an audible alarm will sound 1 The Limits are set from the Upper or Lower Set Up Menu From
23. 7 Reserved Bit 8 Reserved Bit 9 Reserved Bit 10 Reserved Bit 11 Reserved Bit 12 Reserved Bit 13 Reserved Bit 14 Reserved Bit 15 Reserved 5 7 REMOTE OPERATION Questionable Status QUES EVENT QUES CONDITION QUES ENABLE Bit 0 Reserved Bit 1 Reserved Bit 2 Time is questionable Set when the clock has not been set Bit 3 Reserved Bit 4 Reserved Bit 5 Reserved Bit 6 Reserved Bit 7 Calibration is questionable Set when the unit has not been calibrated Bit 8 Reserved Bit 9 Reserved Bit 10 Reserved Bit 11 Reserved Bit 12 Reserved Bit 13 Reserved Bit 14 Command warning Set whenever a command ignores a parameter Bit 15 Reserved 5 5 62XX PPI EMULATION The may be configured to emulate the Ruska 62XX PPI See the 62XX PPI User s Manual for a description of the protocol PPI emulation has the following differences 1 The commands do not affect the local display 2 No calibration commands are supported To change from SCPI to Interface Panel Emulation via the remote interface send the following message SYSTem LANGuage 6220 To change from Interface Panel Emulation to SCPI 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 commands can be terminated by a carriage return hexadecimal 00 or a line feed hexadecimal The responses are always terminate
24. EMPerature TEMPerature2 TEMPerature3 VOL Tage CALCulate TARE DISPlay VALue number STATe 11 0 DISPlay2 VALue number STATe 11 0 LIMit DISPlay LOWer lt number gt UPPer lt number gt DISPlay2 LOWer lt number gt UPPer lt number gt Read sensor A Read sensor B Read upper display value Read lower display value Read sensor A temperature Read sensor B temperature Read internal temperature Read battery voltage Set tare amount for upper display Set tare state for upper display Set tare amount for lower display Set tare state for lower display Set lower limit on upper display Set upper limit on upper display Set lower limit on lower display Set upper limit on lower display CALibration PRESsure The following commands are for both sensors DATA POINts Read number of calibration constants VALue lt n gt Read calibration constant id value VALue lt n gt number Set calibration constant PRESsure The following commands are for Sensor A DATA lt number gt lt number gt lt number gt Set calibration constants C0 C1 C2 VALue lt n gt number CALibration VALue lt n gt POINts REMOTE OPERATION Perform calibration point Read nominal calibration point Read number of calibration points POINts lt up gt lt down gt DATE TIME ZERO DATE TIME VALue number RUN PRESsure 2 Sensor B commands TEMPera
25. FILE To change the profile name 1 From the Main Menu press PREV until the Main Menu appears press Profile F3 2 Press the Define F6 function key 3 Use the up and down arrow keys to highlight the profile name to be changed 4 Press the Rename F1 function key 5 Use the arrow keys to highlight the desired character in the matrix 6 Press Add F3 to add the character to the name entry box 7 Repeat 4 and 5 until the desired name is entered Press Clear F4 to start over 8 Press Enter F5 to accept the name 9 Press PREV to return to the previous Menu 212345670975 ABCDEFGHIJKLM HOPGRS THULE 2 abcdefshijiklm tuus EAG Character Clear Enter Figure 4 16 4 6 MENU The Menu F6 screen enters the operator into the more advanced but less frequently used functions and setup screens 166 8 inHz d 27 15 Pair Mode Se tur Cal Remote Test Figure 4 17 4 6 1 SETTING THE MODE OPERATION The Menu Mode menu is utilized to set up the mode medium display filter variable and rate of change variables EI Airfield edi ir Pressure Filter ate Update 2 Fate Intesrate 5 Default Figure 4 18 4 6 1 1 Setting the PPI in a Standard or Airfield Mode The PPI can be set up to operate in either a Standard or an Airfield mode of operation The standard mode would be utilized for the majority of applications The Airfield mode is used in field barometer appl
26. GE Sensing Houston Center Users Manual Printing amp Assembly Instructions PRINTING 1 FRONT amp BACK COVER PAGES Front and back cover pages first and last pages will be printed in color single sided on 8 1 2 x 11 65lbs white paper 2 INTRODUCTION PAGES Introduction section pages up to Section 1 0 will be printed in color single sided on 8 1 2 x 11 24lbs white paper 3 SECTION AND APPENDIX PAGES All Sections and Appendix pages will be printed in color double sided on 8 1 2 x 11 24165 white paper ASSEMBLY Users Manual will be assembled with front and back 8 3 4 x 11 1 4 Clear View Plastic Covers bound with black spines of appropriate size PACKAGING The assembled Users Manual will be packed in a clear plastic bag or Saran wrapped The package is labeled with bar coded part number as per purchase order GE Infrastructure Model 722X 723X Precision Pressure Indicator PRECISION PRESSURE INDICATOR MODEL 722X 723X 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 72 1001 Revision C Date January 2 2002 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 previousl
27. HE MICROCOMPUTER The microcomputer located on the main CPU board controls all of the system s operations It controls the presettable counters which are used to determine the sensor s output frequency It also controls the A D converter The microcomputer calculates the sensor pressure P given by the polynomial mentioned in Section 2 2 2 The results of this calculation are then sent to the display where they are presented to the user The main microcomputer also handles all communications with other systems connected to the PPI via the RS 232 or optional IEEE 488 interface Using these communications links the microcomputer can receive commands reconfigure the system and supply information in response to requests received The main microcomputer also performs diagnostic tests within the system It always performs a self diagnostic routine when power is first applied and it can be commanded to execute other built in tests at the user s request THEORY OF OPERATION 2 4 2 2 7 MEMORY main board has EPROM FLASH MEMORY for program storage RAM for work area and EEPROM for transducer coefficient and system configuration storage When the user of the PPI changes the system s configuration relevant information is stored in the EEPROM Such information includes the active units of measure the user defined units of measure and the RS 232 configuration When power is subsequently removed and later reapplied the microcomputer reads this sy
28. ORE v WARNING ell DU d M et b E ila vi TABLE CONTENTS du eot Redon doter ona bro e ete OD E its vii LISTORFAGURESE de STOP TABLES strane SECTION 1 0 GENERAL INFORMATION INTRODUCTION cts E ciba i 1 1 1 2 GENERAL 1 1 1 3 FEATURES e dt E Ja 1 1 S b epee eae ce 1 2 2 0 221 INTRODUCTION 25 de a 2 1 22 THE PPI FUNCTIONAL DIAGRAM 2 1 Zu cba recen baat e EO DS RC en 2 1 2 2 2 THE VOLTAGE 2 1 2 2 3 TAE SENSORS ei ila 2 1 2 2 3 1 Conversion Factors rire rai 2 3 2 2 4 THELOGICARRAT eee ae 2 3 2 2 5 THE ANALOG TO DIGITAL 2 3 2 26 THE MICROCOMPUTER 5 2 4 252 Ester EE ei 2 5 2 2 8 THEWATCHDOG HMER slot lr 2 5 229 THE KEYBOARD AND DISPLAY csi 2 5 22 VOTHERS 232 INTERFACE o alla ALI alli 2 6 2 2 1 1THE PLUG IN INTERFACES e 2 6 SECTION 3 0 PREPARATION FOR USE ST INTRODUCTION oa e resi 3 1 3 2 IHEFRONT PANEL
29. TRATTI 5 7 5 6 SERIAL OPERATION eo e rr ot etiem 5 8 SECTION 6 0 PREVENTIVE MAINTENANCE 6 1 INTRODUCTION f exce 6 1 06 2 SYSTEM SELF TEST o tano or toa t a det tiit 6 1 SECTION 7 0 SPECIFICATIONS 7 1 INTRODUCTION spirali 7 1 2 WARM UP TIME pb 7 1 ES TILTSENSHIVIDY arcani annata 7 1 7 4 CALIBRATION PERIOD iiri d ver PEE RR aioe 7 1 7 5 2 7 1 7 0 LONG TERM STORAGE a es 7 1 T SENSOR SPECIFICATION naaa iiy 7 1 SECTION 8 0 PREPARATION FOR STORAGE SHIPMENT 8 1 DISCONNECT INSTRUCTIONS 8 1 8 2 rPACGKING INSTRUCTIONS rr aa 8 1 8 3 PREPARATION FOR SHIPMENT ie 8 1 8 44 SHIPPING INSTRUCTIONS 8 2 APPENDIX ERROR MESSAGES APPENDIX B OPENING THE ENCLOSURE APPENDIX C SENSOR SPECIFICATIONS APPENDIX D INSTALLATION INSTRUCTIONS FOR RACK MOUNT KIT Ix Figure 2 1 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Figure 4 10 Figure 4 11 Figure 4 12 Figure 4 13 Figure 4 14 Figure 4 15 Figure 4 16 Figure 4 17 Figure 4 18 Figure 4 19 Figure 4 20 Figure 4 21 Figure 4 22 Figure 4 23 Figure 4 24 Figure 4 25 Figure 4 26 Figure 4 27 Table 1 1 Table 2 1 LIST OF FIGURES Funct
30. TTERY To install the battery first remove the battery cover located on the rear panel of the PPI Figure 3 2 Slide the battery into the power source enclosure Push the battery until it snaps into place Notice that the battery will not go into the enclosure if it is upside down Put the battery cover back 3 5 2 LOW BATTERY INDICATION When the battery voltage drops below 14 VDC the battery needs recharging If this occurs recharge the battery as explained in the following Section 3 5 3 3 3 PREPARATION FOR USE 3 5 3 There 2 ways to charge the battery l When the battery is not in the PPI use the optional battery charger to charge the battery 2 Battery be charged inside the PPI These options are discussed below 3 5 3 1 Battery Charger For charging the NiMN battery when the battery is not in the PPI Ruska recommends the optional battery charger Ruska part number 7220 CHG Figure 3 4 CAUTION Use only Ruska supplied charger to charge the PPI battery Any other charger may damage the battery This charger accepts 100 240 VAC at 47 63 Hz and outputs 24 VDC 2 5A The red light will come on when it is charging the battery Light will turn green when battery is fully charged Figure 3 4 Battery amp Battery Charger 3 5 3 2 Charging in the PPI PPI has a built in charger To charge the battery while it is installed in the PPI the AC adapter supplied with the PPI
31. These and the unit s other features are discussed below 1 3 FEATURES The following features are standard on the PPI Ease of Calibration A three point calibration can be performed either remotely or entirely from the front panel requiring minimal operator interaction With a triple range 7230 or 7232 multiple calibration points are required Ease of Setting Zero Once a suitable pressure has been applied to the input port zero is set simply by pressing a sequence of buttons on the front panel Choice of Medium See Appendix C Choice of Display Units Standard units include inches of mercury inHg kiloPascals kPa pounds per square inch psi millimeters of water mmH 0 inches of water inH O kilograms per square centimeter kg cm millimeters of mercury mmHg millibars mbar pounds per square foot psf feet and meters In addition four user defined units are also available Adjustable Pressure Display The pressure display can be adjusted to show the desired number of digits after the decimal point Adjustable Rate Display Rate of change of pressure can be displayed in either change per second or change per minute allowing measurement of leak rate and rate of climb In addition the user can also adjust the interval at which the rate display updates as well as the time it takes for the rate display to respond to a step change in the rate 1 1 GENERAL INFORMATION Tare Mode After reference pressure has been e
32. a recommends the use of 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 Sections 8 1 through 8 4 be strictly adhered to in order to prevent damage to the instrument STORAGE SHIPMENT 8 2 APPENDIX ERROR MESSAGES 2207 Nene di __ ___ Commas must be used to separate 5 parameters semi colons to separate SCPI commands Also check for extra characters on the end of a command 104 The SCPI command parameter is the wrong Data Type type i e a string where a number is expected Missing Parameter The SCPI command requires a parameter 110 All SCPI command words start with alphabetic Command Header characters Command Unknown The SCPI command or format is not supported 114 numeric suffix at the end of the command Header Suffix name is out of range The command is not valid in the current mode Settings Conflict of the instrument i e Range setting without a triple ranged sensor The calibration constants stored the Calibration Data Lost instrument have been lost Check the values before using the instrument 315 Configuration Data Some of the instrument setup has been lost Lost 330 Self Test Failed The self test has failed Check the screen for further details 350 One or more errors could not be stored Queue Overflow because the error qu
33. address and the RS 232 interface variables Pome 11 oloca 6226 Baud Rate B 2400 1288 ata Bitz Gad imm 2 Stor Bits Default Figure 4 26 4 6 4 1 SETTING THE EMULATE A RUSKA MODEL 62 The Protocol is set from the Menu Remote menu From the Main Menu press PREV until the Main Menu appears press Menu F6 and then Remote F4 1 Use the up and down arrow key s to highlight Protocol LOCATION OPERATION 4 20 2 Use the left and right arrow keys to select SCPI or 6220 SCPI is the standard interface the 6220 is the Ruska Series 6200 emulation protocol 3 Press PREV to return to the previous Menu 4 6 5 TEST The self test function initiates the same electrical self test that is performed upon power up This can be useful to assure that the system is operating properly 4 6 5 1 Testing Remote Interface When connecting the PPI to a remote IEEE 488 interface the Remote Testing screen can provide the user with a variety of remote troubleshooting capabilities This screen will display both the remote input and output lines that are being transmitted across the interface 4 6 6 DISPLAY The Menu Display screen provides raw data of the system sensors as well as the corrected values in engineering units of measure This screen is generally utilized for troubleshooting the instrument When operating on a battery this screen is useful in viewing the current voltage level o
34. ate and Time 4 14 4 6 3 CALIBRATION cetur Pee 4 15 4 6 3 1 Zeroing Procedure aan 4 15 4 6 3 1 1 Zeroing Gauge Mode Sensors 4 16 4 6 3 1 2 Zeroing Absolute Mode Sensors 4 16 4 6 3 2 Calibration eee 4 17 4 6 3 3 Triple Range Sensor Op users 4 20 4 6 3 4 Editing the Calibration Coefficients 4 20 viii AA REMOTE 4 20 4 6 4 1 Setting the PPI to Emulate a Ruska Model 72XX 4 20 A TE ir dS 4 21 4 6 5 1 Testing Remote Intel fGEe tito 4 21 40 0 DISPLAY ra A E li 4 21 4 6 6 1 Blanking Out the Front 4 21 SECTION 5 0 REMOTE OPERATION 5 1 INTRODUCTION ricrea 5 1 EEE O a AS 5 1 2 nali 5 1 5 2 REMOTE LOCAL OPERATION 5 2 5 3 CONFIGURATION 5 2 5 4 IDEVICE MESSAGES ea e 5 3 5 4 1 SCPI COMMAND FORMAT 259 ud e 5 3 472 SCPI RESPONSE FORMAT 5 3 5 4 3 ANSI IEEE 488 2 1987 COMMAND SUMMARY 5 3 5 4 4 SCPICONMMABND SUMNUARY veleni 5 4 5 4 5 EXAMPLESCPFCOMMANDS 5 6 5 4 6 SCPI STATUS REGISTERS ioca aded bor Met ttn peas 5 6 5 5 62XX PPI EMULATION
35. d by a carriage return followed a line feed The serial port also supports XON XOFF When the XOFF hexadecimal 13 command is received the PPI 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 REMOTE OPERATION 5 8 SECTION 6 0 PREVENTIVE MAINTENANCE 6 1 INTRODUCTION The PPI contains no user serviceable parts and is virtually maintenance free In fact re zeroing and calibration of the unit are the only routine processes needed to keep the PPI operating within specifications The re zeroing and calibration procedures along with recommended intervals are discussed in Section 4 6 3 If instrument failure is suspected the user is advised to perform the SELF TEST described in Section 6 2 If there is any other failure in the instrument do not attempt to correct it Instead contact Ruska to report the problem NOTE When contacting Ruska be prepared to furnish the model number serial number pressure rating and software version see Section 4 6 2 5 System Set 6 2 SYSTEM SELF TEST The PPI software has a SELF TEST feature which checks the function of the following items To perform the System SELF TEST press MENU F6 then TEST F5 the
36. dle of the Rack Mount Assembly 7220 RMK Align the threaded holes of the feet to the four holes on the base of the cradle Secure the Precision Pressure Indicator with four 4 40 screws and washers as shown in the figure above D 1 APPENDIX D rack mount installation is complete and ready for insertion into a suitable Standard RS 310 C rack Hardware for attachment of the rack to the equipment has not been provided Hook up electrical and plumbing connections after installation into the rack equipment PARTS LIST PART NUMBER DESCRIPTION QUANTITY 72XX 1D02 INSTRUCTION SHEET 7220 RMK RACK MOUNT ASSEMBLY 70 119 1201 SCREW PHILLIPS 4 40 x 3 8 SS 91 246 WASHER 4 APPENDIX D D 2 U S A 10311 Westpark Drive Houston TX 77042 T 713 975 0547 F 713 975 6338 imagination at work 72XX 1D01 Revision C January 2 2002
37. er Calibration Menu Remote Set Remote Communication Hardware Status Test Enter Test Menu Self Initiates Electronic Self Test Remote Displays Remote Communication Disp Display Transducer Qutput Values Figure 4 2 Model 7200 Menu Structure LOCATION OPERATION 4 2 4 3 MAIN MENU The information displayed the main menu varies based the instrument set up In general it denotes the current pressure reading in the current unit of measure t identifies the sensor or mathematical relationship between two sensors e g A B that is being actively displayed and if the sensors pressure has a tare applied to its reading For multi ranged sensors the current active range is also denoted below the pressure reading The function key F1 labeled Upper enters the menu that allows the operator to change what is being displayed in the upper half of the display The function key F2 allows the operator to set up the lower portion of the display The F4 function key enters the menu that allows the operator to quickly move from various user configured display settings that the operator has previously saved Finally the F6 Function key enters into further menu options that are available to the operator 1235456759 inH2z 10008 Sr PSI Upper Lower Manu Figure 4 3 4 44 UPPER AND LOWER DISPLAY Although the PPI has a single graphics display it is designed to display two primary lines of info
38. eue is full High Limit Exceeded The reading has exceeded the high limit Low Limit Exceeded The reading has exceeded the low limit triple ranged sensor has exceeded 110 of Pressure Over the current range The pressure must be Range Invalid reduced to below 100 psi before the reading is valid again ERG Fac n Date Logi de factory setup of the instrument has been 601 lata Calibration mode CAL MODE must be entered Calibration Mode before a remote calibration will be accepted 707 High Pressure must be below 100 psi to change ranges on a triple ranged sensor 1 APPENDIX A Invalid Separator THIS PAGE INTENTIONALLY LEFT BLANK APPENDIX A A 2 APPENDIX B OPENING THE ENCLOSURE Normally the user should not need to open the PPI enclosure However if it becomes appropriate to open the unit the following procedure is recommended Note that software is uploaded through the RS232 COM port A Remove the four 6 32 screws on the rear of the outer case and set it aside for later use B Pull the inner case from the front The inner case will slide out Place the inner case on the workbench To reassemble reverse this procedure 1 APPENDIX THIS PAGE INTENTIONALLY LEFT BLANK APPENDIX B B 2 APPENDIX SENSOR SPECIFICATIONS MODELS 7220 AND 7222 SPECIFICATIONS IN FULL SCALE 0 150 0 750 0 1034 0 5000 Output Signals Defined as the combined effects of linearity
39. example Method Two Connect a vacuum sensor and a vacuum pump to the test port of the PPI Pull a hard vacuum less than 200 mtorr on the test port Convert the reading from the vacuum sensor into the same unit of measure as the current PPI unit of measure selection Enter this vacuum reading into the PPI as the zero offset Example if the vacuum pump pulled the test port down to a vacuum gauge reading of 100 mtorr the value entered into the PPI for this zero reading would be 0 0019 psia 100 mtorr x 222028 0 0019 psi Imtorr This method tends to be the most accurate method for sensors that are designed to operate at these hard vacuum levels If the pressure sensor in the PPI has a minimum LOCATION OPERATION 4 16 pressure range i e Range 0 4 to 19 psia the minimum range is 0 4 psia that is higher than a hard vacuum this method should not be used Method Three Compare the PPI to a barometer with both instruments at the same height to correct for pressure heads and enter the barometers reading as the zero reading to the PPI This method would only be suggested if the uncertainty of the barometer would not negatively influence the uncertainty of the PPI Whichever method is selected the following steps would be required to zero the 1 Select one of the zeroing methods described above and connect accordingly 2 From the Main Menu press PREV until the Main Menu appears press the Menu F6 Cal F3 Zer
40. f the see figure 4 25 As pressure is admitted into the test port the measured pressure on the PPl s screen will change accordingly on the Reading Line of the PPI display 2 2 When the measured pressure stabilizes enter the applied pressure value Do not enter the measured pressure reported by the a Use the left and right arrow keys to highlight the variable you wish to edit b Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value c Usethe left and right arrow keys to increment to the next digit d Repeat steps b and c until the entire value is entered e Hit the Enter key to accept the entry 2 3 If the actual pressure applied by the standard is within the indicated tolerance the third calibration screen will appear NOTE 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 then re enter the actual pressure repeat Step 2 2 if necessary Step 3 3 1 To begin step 3 use a calibration standard to apply 10096 596 of the full scale pressure requested by the Apply Line of the see figure 4 25 As pressure is admitted into the test port the measured pressure on the PPI s screen will change accordingly on the Reading Line of the PPI display LOCATION OPERATION 4 18 3 2 When the measured pre
41. f the battery Senzor B Teme B Sensor Teme Battery 25945 25679654 Int TemP Figure 4 27 4 6 6 1 Blanking Out the Front Display To conserve battery power and to act as a screen saver the front display backlight will blank out after the time has expired that is set in the display screen saver backlight timeout see Section 4 6 2 1 The display can also be blanked by selecting the Menu F6 Disp F6 Blank F3 4 21 LOCAL OPERATION THIS PAGE INTENTIONALLY LEFT BLANK LOCATION OPERATION 4 22 SECTION 5 0 REMOTE OPERATION 5 1 CAPABILITIES The can be operated remotely by a computer Two interfaces are supported 488 and RS 232 Both interfaces support SCPI Standard Commands for Programmable Instruments and emulation of a Ruska 62XX PPI 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 PPI Identification codes are described in the IEEE 488 standard SH1 Source Handshake Complete Capability Handshake Complete Capability 5 L3 Listener SRI Service Request Complete Capability RL Remote Local Complete Capabi
42. his type of rack mount kit as a 3U The options available are summarized in Table 1 1 Ruska periodically introduces new features and options most of which be retrofitted into existing units Contact your Ruska sales representative for further information TABLE 1 1 PRECISION PRESSURE INDICATOR OPTIONS ITEM RUSKA PART NUMBER Sealed NiMH Battery 4 722 Battery Charger 7220 CHG Carrying Case IEEE 488 Interface Additional Manuals Rack Mount 1 3 GENERAL INFORMATION THIS PAGE INTENTIONALLY LEFT BLANK GENERAL INFORMATION 1 4 SECTION 2 0 THEORY OPERATION 2 1 INTRODUCTION The Ruska Series 722X 723X Precision Pressure Indicator PPI uses state of the art sensor and electronics technology to provide a highly accurate and flexible pressure instrument This portion of the manual reduces the PPI to its individual function blocks and explains the relationship of each subsystem to the system as a whole 2 22 A FUNCTIONAL DIAGRAM Figure 2 1 on page 2 2 shows a simplified block diagram of the PPI Each subsystem will be addressed in the following sections 2 2 1 THE VOLTAGE SOURCE The PPI is designed to accept two different sources of power The sources include the plug in AC to DC power converter provided with the unit and the optional 12 volt battery For more information on these products see either Section 1 0 General Information or Section 3 4 Getting Started 2 2 2 THE VOLTAGE REGULATOR
43. hysteresis and repeatability 1 MODELS 7230 AND 7232 SPECIFICATIONS FULL SCALE Ranges psi 15 20 000 psi 30 000 40 000 psi SI 100 kPa 140 MPa 210 280 MPa Wetted Materials 3041 3161 SS Nickel 304L 316L SS Inconel Gold Solder 718 Defined as the combined effects of linearity hysteresis and repeatability APPENDIX C C 2 APPENDIX D INSTALLATION INSTRUCTIONS FOR RACK MOUNT KIT RACK MOUNT KIT FOR 72XX SERIES PRECISION PRESSURE INDICATOR INTRODUCTION The Rack Mount Kit Ruska part number 7220 RMK provides a convenient method of installing the 72XX Series Precision Pressure Indicator into a standard nineteen inches equipment rack There is some assembly required in order to adapt the gage unit to the kit Please follow the instructions in the order presented to facilitate proper installation 72 Precision Pressure Indicator Front Panel 4 40 Screw amp Cradle Washer 4X Rack Mount Assembly INSTALLATION 1 Assure that power is off and any cabling and plumbing is disconnected from the pressure gage 2 Place the unit upside down on a soft surface to protect its finish 3 Remove the rectangular rubber feet from the two front tilt up feet to expose the screw Remove the screw securing the tilt up feet to the unit 4 Remove the screws securing the two rear soft rubber feet to the unit 5 Place the Precision Pressure Indicator in the cra
44. i 1 4 NBSF 3 4 GETTING STARTED Unpack the PPI and retain the packaging if possible A standard PPI comes with the pressure transducer of the customer s choice an AC adapter power cord and a user s manual After the has been unpacked the following checklist should be completed l Inspect the PPI for any visible signs of damage PREPARATION FOR USE 3 2 2 Locate the full scale pressure label on the front panel of the Figure 3 1 Verify that the unit is rated for the range of pressure desired 3 PPI operates 18 VDC The AC adapter s output is 18 VDC 2 amp 36 Watts and input supply is 100 240 VAC 50 60 Hz Plug the AC adapter into the power jack located on the rear panel of the PPI Figure 3 3 The input of the AC adapter is plugged to the wall with a cord country appropriate into an outlet rated for 100 240 VAC at 50 60 Hz Figure 3 3 Power Connection 3 5 BATTERY OPERATION OPTIONAL All models of the PPI are fully operational when used with the optional rechargeable NiMH battery Ruska part number 4 722 CAUTION Only use the Ruska supplied battery Other batteries may damage the This battery will not leak and therefore can be used in any position t is approved for air travel by the Department of Transportation DOT and the International Air Transport Association IATA This battery is easy to install and typically provides the user with over 8 hours of operation 3 5 1 INSTALLING THE BA
45. ibration de de ye 4 17 Calibration Step Screen wis heehee sens ela sae tated ssa 4 17 Remote Operation Screening 4 2 Meno Display nia 4 21 LIST OF TABLES Precision Pressure Indicator Options ii sed 1 3 Conversion ata dt 2 4 X SECTION 1 0 GENERAL INFORMATION 1 1 INTRODUCTION This manual contains operation and preventive maintenance instructions for the Series 722X 723X Precision Pressure Indicator PPI manufactured by Ruska Instrument Corporation Houston Texas NOTE The X character in 722X is a place holder for a specific number which determine model numbers The X is 0 if one sensor is installed and 2 if two sensors are installed Example 7222 0 01 accuracy two sensors 1 2 GENERAL INFORMATION The Ruska Series 722X 723X Precision Pressure Indicator PPI is used to measure absolute tare pressure and rate of change of pressure The measured pressure can be displayed in one of twenty different pressure units These include units of altitude which also allows the PPI to be used with altimeters and rate of climb indicators The instrument is designed to operate with one or two sensors and is extremely easy to operate and maintain and its light weight makes it very portable Its serial interface and optional IEEE 488 interface allow it to communicate with computers and other suitably equipped instruments
46. ications where the operator wishes to correct the pressure output for an airfield elevation and air temperature 4 11 LOCAL OPERATION 4 6 1 2 Setting the Gas Medium The PPI is designed to incorporate a variety of different types of pressure sensors Some of these specifically the sensor based on vibrating cylinder technology is sensitive to the density of the gas medium On these type of sensors it is important to set the gas medium to the same medium that the PPI is being calibrated or operated On all other sensor types this variable has no effect 4 6 1 3 Setting Up the Pressure Display Filter The amount of filtering that occurs on the front display can be varied The default value is set to 10 Entering a larger number increases the amount of filtering and results in a smoother display output A smaller number decreases the amount of filtering on the displayed pressure valve 4 6 1 4 Setting the Rate Update Coefficient The PPI s rate display can be adjusted to update as quickly as 5 times a second or as slowly as every 2 seconds To adjust how often the display updates 1 From the Main Menu press PREV until the Main Menu appears press Menu F6 and then Mode F1 2 Use the up and down arrow key to highlight Rate Update Hit the Enter key Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value The Rate update can
47. ional Diagram of the Pratt 2 2 Weoo o ER M 3 1 ea 3 2 Power CONS 3 3 Battery and Battery Cael 3 4 Model 7200 Front Panel dec dit 4 Model 7200 Menu Structure oso c oci ad ote gets 4 2 a e dea du a 4 3 Upper and Lower Display eal asd eb Cu ed 4 3 Display Settings in Standard Mode nce aaa 4 3 Pressure Correction Airfield Mode arr re era p reda 4 6 Pressure Correction Airfield Mode eoe tae He FO A SE 4 6 Selecting Pressure Units of 4 6 Defining a New Pressure Unit of Measure 2 4 7 Setup 4 8 leak Test Sereen bel 4 8 Trend Graph Screen do sis 4 9 Peak Hold 4 9 Es ea 4 10 areata 4 10 Renaming a User 4 11 Main Menu DONEC seo 4 11 Sefting Mode btOperatioi 4 11 Display Set Up Sereen sonen en dtt tv o brilli 4 13 System Seite Screen ee pore En deer dec o 4 14 Calibration Coefficients aed dal EDO ES 4 15 EUR ilo 4 16 Calibration Screen d occ era 4 16 Cal
48. ired the following methods may be used 1 Issue a Local Lockout LLO interface message via the IEEE 488 interface The PPI will disable the local keyboard until the Go To Local GTL interface message is received or the REN Remote Enable 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 PPI will disable the local keyboard until the command SYSTEM KLOCK OFF is received 3 Issue the SCPI command DISPLAY ENABLE OFF or DISPLAY TEXT lt string gt 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 PPI off and back on 5 3 CONFIGURATION The remote interface must be 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 Protocol Baud Rate Data Bits Parity Stop Bits To configure the remote interface 1 The remote interface is configured from the Remote Menu From the Main Menu press PREV until the Main Menu appears press Menu F6 then Remote F4 2 Use the up and down arrows to highlight the desired parameter 3 Use the left and right arrows to change the parameters The ENTER key may be used to change the
49. isplay F1 3 Press the tare key 4 Press the PREV key to return to the main menv The display denotes that it is in the tare mode by displaying Tr above the unit of measure The pressure displayed by this sensor should now be reading zero as opposed to the barometric pressure that was previously displayed 4 4 2 DISPLAYING PRESSURE CORRECTED FOR FIELD ELEVATION IN THE AIRFIELD MODE The is capable of displaying pressure QFE and QNH to display pressure corrected for field elevation To operate as an Airfield Barometer the unit must first be set up as an airfield barometer This is performed from the main menu by pressing the Menu F6 Mode F1 then with the highlight on the Mode option use the left or right arrow key to highlight Airfield see Figure 4 6 From the Main Menu press PREV until the Main Menu appears press either Upper F1 or Lower F2 and then Display F1 1 Use the up and down arrow keys to highlight Display 2 Use the left and right arrow keys to highlight QFE or QNH 3 To set up the Airfield Elevation and Temperature a Press the Airfield F2 function key b To change the elevation unit of measure press the Feet F1 or the Meters F2 function key c Enter the Altitude See Figure 4 7 i Use the up and down arrow key to highlight Altitude ii Press the Enter key Use the up and down arrow keys to scroll through a list of choices including a decimal negative sign and nu
50. ithout changing the units cmHz 4 C useri inH20 4 C user inH20 20 C atm inH20 25 C mbar knots FS Figure 4 8 The uses the conversion factors listed in table 2 1 to translate the pressure from kilopascal to one of the PPI s units of measure In addition to the predefined units offered in the Units menu there are four user defined units available USER 1 and USER 2 are directly available The units of measure of atm and mbar are preset and will default but can be edited if additional user defined units are needed LOCATION OPERATION 4 6 4 4 3 1 Defining New Pressure Unit In addition to the standard units of measure provided by the PPI four user defined units are available To create or modify 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 kiloPascal kPa For example using the information from Table 2 1 the conversion factor for millitorr or one micron of mercury at 0 C is calculated as follows 1000mTorr 11450377 mTorr kPa x lTorr 0193368 1 thus the conversion factor simplifies to mTorr kPa x 7500 6051 1 The pressure units are defined from the Units Define Menu From the Main Menu press PREV until the Main Menu appears press either Upper F1 or Lower F2 then Unit F2 and then Define F1 The screen of Figure 4 9 will be available 2 Press Next F
51. leak test from the Main Menu press PREV until the Main Menu appears 1 Press either Upper F1 or Lower F2 and then Leak F4 2 Set the Wait and Test times or if okay go to step 3 a Using the up and down arrow keys to highlight the variable you wish to edit b Press the Enter key c Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value d Use the left and right arrow keys to increment to the next digit LOCATION OPERATION 4 8 e Repeat steps until the entire value is entered f Hitthe Enter key to accept the entry 3 To start the leak test press the Run F2 function key min Figure 4 11 When the test is completed the PPI will display both the change in pressure in current pressure units and the rate of change in the current unit per minute The operator must apply a rationale to the rate of change of pressure to evaluate or determine a leak condition Pressure changes due to thermal affects or volume creep may result in a rate of change of pressure that decays with time 4 4 6 DISPLAYING A THREE HOUR TREND GRAPH The PPI has the ability of displaying a three hour trend graph as shown in figure 4 12 The Graph scaling occurs automatically with the set at 3 hours and the y axis set at the maximum and minimum pressures that occurred during the previous 3 hours To Display the gra
52. lity PPO Parallel Poll No Capability Device Clear Complete Capability DTO Device Trigger No Capability Controller No Capability 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 5 1 2 5 232 The RS 232 interface supports standard serial operation from a computer to a single PPI RS 232 supports the IEEE 488 2 and SCPI commands The PPI allows the following port setups Baud Rate 1200 2400 9600 or 19200 Data Bits 7 or 8 Parity Even Odd or None Stop Bits 2 Handshaking XON XOFF 5 1 REMOTE OPERATION RS 232 connection is DB 9P connector found the back panel of the PPI following pins are used all other pins are reserved Pin Direction Signal 2 In RXD Receive Data 3 Out Transmit Data 5 GND Ground 7 Out RTS Request to Send 5 2 REMOTE LOCAL OPERATION In Local mode the PPI is operated manually through the front panel Section 4 of this manual covers Local mode operation The PPI always powers up in the Local mode In Remote mode the PPI 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 requ
53. merical numbers representing the desired value 4 5 LOCAL OPERATION iv Use the left and right arrow keys to increment to the next digit v Repeat steps iii and iv until the entire value is entered vi Hit the Enter key to accept the entry d Enter the Temperature See Figure 4 7 i Use the up and down arrow key to highlight Temperature ii Press the Enter key Use the up and down arrow keys to scroll through a list of choices including a decimal negative sign and numerical numbers representing the desired value iv Use the left and right arrow keys to increment to the next digit v Repeat steps iii and iv until the entire value is entered vi Hit the Enter key to accept the entry 4 Press PREV to return to the main menu Upper 27 19 mmHas Tare Uff B A E B A QFE ate off Tare Airfield feet meters Figure 4 6 Figure 4 7 4 4 3 SELECTING PRESSURE UNIT OF MEASURE 1 The pressure units are selected from the Units Menu for either the upper or lower display To change the unit of measure for the Upper or Lower display from the Main Menu press PREV until the Main Menu appears press Upper F1 or Lower F2 and then the Units F2 The current units will be highlighted 2 Use the arrow keys to highlight the desired pressure unit Figure 4 8 shows the unit of measure of psi being selected 3 Press ENTER to accept the change Press PREV to exit w
54. must be connected The PPI is capable of simultaneously operating and properly charging its battery Note that this connection can be used to provide an uninterruptible power supply for the PPI While AC power is available the PPI will draw power from the AC power supply If AC power fails the battery will automatically take over until AC power is restored Typical battery life is 6 to 8 hours 3 5 4 STORING THE BATTERY To prolong the life of the battery it should be thoroughly charged before it is stored Once it has been fully charged it should hold its charge for six to nine months Temperatures at or below 50 F 10 C are ideal for battery storage 3 6 CONNECTING A TEST PRESSURE A test pressure may be connected to the pressure test port prior to turning the unit on To connect a test pressure to the PPI first locate the pressure test port on the rear of the unit PREPARATION FOR USE 3 4 see Figure 3 2 Use appropriate fittings see Section 3 3 1 to connect the test pressure to the PPI and tighten to the specifications provided by the manufacturer of the fittings WARNING In order to avoid damage to the unit test pressures applied to the test port must be well within 120 of full scale 3 7 POWER UP Turn on the PPI by activating the rocker switch on the rear panel Once the PPI passes its self test the upper display will show the pressure measured at the test port in one of the display units listed in Section
55. n select is 10 4 6 3 4 Editing the Calibration Coefficients If the PPl s memory is erased but the calibration coefficients are known the user can restore the coefficients to the PPI 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 To edit the calibration coefficients press Menu F6 Cal F3 Coef F3 f the access code is enabled enter it at the access code prompt 1 Use the up and down arrow keys to highlight the coefficient to be edited 2 Use the left and right arrow keys to highlight the variable you wish to edit 3 Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value 4 Use the left and right arrow keys to increment to the next digit 5 Repeat steps 3 and 4 until the entire value is entered 6 Hit the Enter key to accept the entry Once the calibration coefficients are input it is recommended that the user should verify several pressure readings If there are any variances beyond the stated precision at these points then the calibration procedure should be performed 4 6 4 REMOTE The remote menu is used to set up the remote interface This menu is utilized to set up the IEEE 488 interface
56. n SELF F3 1 Coprocessor This test checks for function of the processor and reports pass fail condition to the screen 2 Clock This test checks the on board computer BIOS The processor board memory config check sum memory size and time are checked Any failure is reported to the screen 3 Timer The interrupt is intended to operate at 100 Hz Any significant deviation from that is reported as the actual frequency noted 4 EEPROM This tests the contents of the EEPROM for changes and reports pass fail to the screen To exit the SELF TEST screen press PREV twice 6 1 PREVENTIVE MAINTENANCE THIS PAGE INTENTIONALLY LEFT BLANK PREVENTIVE MAINTENANCE 6 2 SECTION 7 0 SPECIFICATIONS 7 1 INTRODUCTION This portion of the manual discusses the parameters which can affect the unit s precision of measurement Sections 7 2 through 7 7 discuss parameters such as warm up time and tilt sensitivity 7 2 WARM UP TIME After the instrument has been removed from storage it is important to maintain the instrument within the operating temperature range for at least one hour After the instrument has been turned on it will take less than 30 minutes for it to indicate pressure to rated accuracy Typically at room temperature the instrument will exhibit the specified accuracy within 15 to 20 minutes 7 3 TILT SENSITIVITY If the instrument is calibrated in the same position that it is used then there will be no additional erro
57. neral prepare the for shipment as follows 1 In order to minimize turn around time Ruska should be notified of the return of equipment prior to shipment contact customer service department When notifying Ruska please include the part number serial number billing and ship to address and the user s name and phone number Ruska will supply an RMA Return Material Authorization number Please include this RMA number in all paper work This information should be duplicated and included with the 8 1 STORAGE SHIPMENT shipment when the goods are returned There will be minimal charge for inspection and or evaluation of returned goods 2 Enclose the PPI in plastic or any good water barrier material Anti static material is advisable 3 Cover top bottom and sides with polyfoam 4 Inside the carton include the following a Statement of the problem or service needed Be specific Include any local or remote error codes that occurred during operation and if possible mention the component suspected of failure Also include the name and telephone number of a knowledgeable technician for consultation b The part number serial number return address and Ruska RMA number 5 Seal the carton using gummed tape 6 Address the carton to RUSKA INSTRUMENT CORPORATION 10311 Westpark Drive Houston Texas 77042 7 Labels recommended are THIS SIDE UP HANDLE WITH CARE DO NOT DROP and FRAGILE 8 4 SHIPPING INSTRUCTIONS Rusk
58. nute and second hhmmss All digits must be entered LOCATION OPERATION 4 14 b Use the up and down arrow keys to scroll through a list including decimal negative sign and numerical numbers representing the desired value c Use the left and right arrow keys to increment to the next digit d Repeat steps b and c until the entire value is entered e Hit the Enter key to accept the entry 4 6 3 CALIBRATION To keep the PPI operating within its specification the calibration procedure described below should be performed periodically The recalibration interval should be based on the stability of the instrument as obtained from its past calibration history or from the Ruska product specification CAUTION The calibration procedure automatically generates coefficients that are stored in the PPl s memory 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 they may be restored to the PPI at any time by editing the coefficients see Section 4 6 3 2 without performing a new calibration on the PPI The calibration menu allows the operator to zero calibrate or edit the calibration coefficients When any of these procedures are performed the automatically date stamps this function to provide proof that this event occurred If the access code is enabled it must be entered in order to perform these
59. o F1 3 For a Dual Sensor select the sensor to be zeroed press Zero A F1 to zero sensor or Zero B F2 for sensor B see Figure 4 22 4 Enter the actual pressure that exist at the test port a Use the left and right arrow keys to highlight the variable you wish to edit b Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value c Use the left and right arrow keys to increment to the next digit d Repeat steps b and c until the entire value is entered e Hit the Enter key to accept the entry 5 Press the PREV key multiple times to return to the main menu 4 6 3 2 Calibration Instructions To calibrate the the user connects a calibration standard such as a Ruska Model 2465 for pneumatic pressures or the Model 2485 deadweight gauge for hydraulic pressures to the test port Follow the menu driven procedure as shown on the front display number of pressure points and the recommended pressures to be generated will be displayed by the PPl s menu driven calibration procedure On a standard single range sensor this will be a three point calibration at O or near zero 50 and 100 of the PPI s Full Scale No disassembly is required and there are potentiometers to adjust to calibrate the PPI Sensor Full Scale fi i n FS 19 0000 FSi Step 2 6 BEBE Zero 09 01 2000 Reading 4 6888 FS i 6 BEEBE Cal
60. o the nearest integer for commands accepting integer values only A message is terminated by a line feed hexadecimal OA Carriage returns tabs and other control characters are ignored 5 4 2 SCPI RESPONSE FORMAT Only commands ending in a question mark 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 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 format d ddddddddE dd 5 4 3 ANSI IEEE 488 2 1987 COMMAND SUMMARY CES Clear Status ESE Event Status Enable Query number Event Status Enable ESR Event Status Register IDN Identification Operation Complete Query Returns 1 OPC Operation Complete RST Reset SRE Service Request Enable Query SRE lt number gt Service Request Enable 5 3 REMOTE OPERATION 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 PRESsure 2 DISPlay DISPlay2 T
61. orporation Teflon is a trademark of E l DuPont 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 iii REVISION NOTICE SEE DESCRIPTION 722X 723X A Original Release DC RO 22739 722X 723X B 06 25 01 Changes per ECO 21283 722X 723X C 01 02 02 Changes per DC RO 23193 iv REVISION HISTORY RELEASE 72 1001 Revision B 06 25 01 Released per ECO 21283 RELEASE 72 1001 Revision C 01 02 02 Released per DC RO 23193 V WARNING PRESSURIZED VESSELS AND ASSOCIATED EQUIPMENT ARE POTENTIALLY DANGEROUS THE APPARATUS DESCRIBED IN THIS MANUAL SHOULD BE OPERATED ONLY BY PERSONNEL TRAINED IN PROCEDURES THAT WILL ASSURE SAFETY TO THEMSELVES TO OTHERS AND TO THE EQUIPMENT BEFORE PERFORMING ANY MAINTENANCE TURN OFF POWER AND DISCONNECT POWER CORD FROM POWER SOURCE vi TABLE CONTENTS cela lol bi ae parigi il COPYRIGHT elc e eis iii REINO TEE p iv REASON ST
62. ph from the Main Menu press PREV until the Main Menu appears press either Upper F1 or Lower F2 and then Graph F5 and the PPI will display the three hour trend in the current unit of measure Figure 4 12 4 4 7 PEAK HOLD The PPI can display the maximum and minimum pressure that occurred since the last reset This allows the PPI to be readily used to test relief valves To get to this display from the main menu press PREV multiple times to get to the main menu press either Upper F1 or Lower F2 depending on which sensor is to be used 27 15 inH205R i mum 191 12 Mii rar 12 58 Reset Diserlsy Unit Setur Leak Figure 4 13 The operator can increase pressure to the system and the will display the maximum pressure that was achieved prior to the relief valve opening The Reset MinMax F6 function key is used to reset the maximum and minimum pressure values The can be used in this mode for relief valve testing 4 9 LOCAL OPERATION 4 5 SETTING UP USER DEFINED PROFILE The is capable of storing up to 4 user defined profiles A profile is used by the PPI to save the display configuration for future recall This way the most commonly used configurations can be stored and easily reconfigured with minimum key strokes As an example a user may have a dual channel PPI that is used in two primary applications One may be as a measure mode Air Data Test Set ADTS to
63. ressure minimum REMOTE OPERATION REMOTE OPERATION PRESsure 2 RANGe Sensor B STATus OPERation EVENT CONDiItion ENABle number QUEStionable EVENT CONDition ENABle PRESet SYSTem DATE lt year gt lt month gt lt day gt ERRor Error KLOCk 1 0 TIME lt hour gt lt minute gt lt sec gt VERSion LANGuage COMP SCPI 6220 COMMunicate SERial TRANsmit BAUD lt number gt Read and clear operation event register Read operation condition register Set operation enable mask Read and clear questionable event register Read questionable condition register Set questionable enable mask Clear enable masks Set system date returns lt error descr info gt 0 Set keyboard lock Set system time SCPI protocol version returns 1991 0 Set remote protocol Set remote baud rate PARITY ODD NONE Set remote parity BITS 7 8 SBITs 1 2 GPIB ADDRess lt number gt SET lt block gt TEST ELECtronic UNIT DEFine lt n gt lt name gt lt number gt PRESsure lt name gt DISPlay lt name gt DISPlay2 lt name gt 5 6 Set remote data bits Set remote stop bits Set remote address Set profile data Perform electronic self test Create unit Set pressure units for SCPI commands Valid unit names are KPA BAR PSI KG CM2 MMHGOC CMHGOC INHGOC INHG60F CMH20OAC INH2O20C 2025 FS FT
64. rmation simultaneously Each line can be set up independently by the operator and is identified as the Upper and the Lower displays To modify the format of the upper display the operator would select the Upper F1 function key and then modify this display as required The lower display would be modified by pressing the Lower F2 function key 27 195 2 5 i mum 191 12 Mii rara 12 58 Reset DisPlsy Unit Setur Leak Figure 4 4 4 4 1 DISPLAY SETTINGS IN THE STANDARD MODE When the is set up to display in the Standard Mode for Airfield Mode see Section 4 6 1 the following type of display configurations are available Please note the display screen see Figure 4 5 will vary based on the number of transducers that are installed in the PPI and the options that were included with the PPI Not all systems will display all of the information shown in Figure 4 5 nH20 2990 min Tare Full Scale Figure 4 5 4 3 LOCAL OPERATION 4 4 1 1 Selecting Which Sensor to Display With a that has two pressure sensors installed the operator has the option of displaying either sensors reading or a variety of mathematical relationships between the two sensors in either the upper or lower display The sensor is selected from the Upper or Lower Display Menu From the Main Menu press PREV until the Main Menu appears press either Upper F1 or Lower
65. rom the Menu Setup menu From the Main Menu press PREV until the Main Menu appears press Menu F6 and then Setup F2 1 Use the up and down arrow key s to highlight Key click 2 Use the left and right arrow keys to select on or off 3 Press PREV to return to the previous Menu 4 6 2 4 Calibration Password The calibration password allows the operator to protect access to the PPl s 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 PPI or manually change the calibration constants 4 13 LOCAL OPERATION NOTE Document the calibration password as it is not retrievable from the PPI 1 The calibration password is set from the Menu Setup menu From the Main Menu press PREV until the Main Menu appears press Menu F6 then setup F2 2 Use the up and down arrow keys to highlight Access 3 Enter the new calibration password Setting the calibration password to zero allows access to PPI calibration and constants a Using the left and right arrow keys to highlight the variable you wish to edit b Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value c Repeat steps a and b until the entire value is entered d Hit the Enter key to accept the entry 4 Press Yes F4 to acknowledge changing the
66. rs introduced due to positioning 7 4 CALIBRATION PERIOD It is recommended that the instrument be calibrated against a suitable pressure standard at least once per year 7 5 TEMPERATURE EFFECTS The instrument will measure pressure to within rated accuracy if operated between O and 50 C There is no temperature compensation for the user needs to calculate The instrument may not indicate pressure to rated accuracy if the ambient temperature is changing by more than 20 Celsius degrees per hour or more than 1 Celsius degree per 3 minutes When the instrument is subjected to a temperature shock of more than 5 Celsius degrees a soak time of 15 minutes for every 5 C temperature shock must be allowed Thus for a temperature shock of 20 Celsius degrees a soak time of 1 hour must be allowed 7 6 LONG TERM STORAGE The PPI should be stored in a cool dry place with the battery or power supply removed Refer to Section 8 for instructions 7 77 SENSOR SPECIFICATION See Appendix C for sensor specifications 7 1 SPECIFICATIONS THIS PAGE INTENTIONALLY LEFT BLANK SPECIFICATIONS 7 2 SECTION 8 0 PREPARATION FOR STORAGE SHIPMENT 8 1 DISCONNECT INSTRUCTIONS NOTE It is essential that the procedures mentioned in Sections 8 1 through 8 3 be strictly adhered to in order to prevent damage to the instrument Failure to follow these procedures may result in damage during shipment that will not be covered by the carrier s insurance
67. ssure stabilizes enter the applied pressure value Do not enter the measured pressure reported by the PPI a Use the left and right arrow keys to highlight the variable you wish to edit b Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value c Usethe left and right arrow keys to increment to the next digit d Repeat steps b and c until the entire value is entered e Hit the Enter key to accept the entry 3 3 If the actual pressure applied by the standard is within the indicated tolerance the calibration complete screen will appear NOTE On some high pressure sensor versions of the Model 7230 a fourth pressure point may be requested This would be identified in the menu driven calibration procedure Typically this point would be to reproduce the 50 pressure point but approaching this pressure in a downward approach from the full scale pressure of the sensor NOTE f 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 then re enter the actual pressure repeat Step 2 2 if necessary Step 4 Calibration is complete To store the calibration coefficients in memory select OK F6 Step 5 Press PREV to return to the main menu This completes the adjustment portion of the calibration It is recommended that a number of
68. stablished at the test port tare mode instructs the PPl s software to subtract this reference pressure from all subsequent pressures detected at the test port In this way the PPI with absolute transducers can simulate gauge pressure Serial Interface RS 232 communication syntax allows the PPI to be used in automated measurement systems for easy data acquisition Lightweight Weighing less than 9 lbs the PPI can easily be carried between measurement sites Adjustable LCD Brightness The user selects the desired level of brightness for the front panel LCD s This feature allows the user to conserve battery life in applications where only battery power is available Choice of Pressure Range The PPI is currently available in many full scale ranges from 19 to 40 000 psia Consult Ruska s Sales Literature for a current list of available ranges Self Test Upon power up the PPI performs a brief self test to ensure that all hardware and software are operating properly Ease of Operation All local operations are accessed through a menu style interface Frequently used selections such as the display units are maintained in memory through power off and on 1 4 OPTIONS A standard PPI comes with one of three available pressure transducers a plug in power supply and a user s manual Although the PPI is fully functional with just these items the following options are also available WARNING Do not connect RS 232 or IEEE 488 cables to the
69. stem configuration information from the EEPROM and restores the system to its previous configuration 2 2 8 THE WATCHDOG TIMER A watchdog timer is utilized to reset the microprocessor if it should suffer certain temporary operational problems microcomputers program instructs it to periodically reset the watchdog timer Should the processor cease operation of its main program it would cease resetting the watchdog timer The watchdog timer would then time out and reset the processor In this event the processor would begin operating its program from the start beginning with the self diagnostics tests Detectable errors are reported to the user 2 2 9 THE KEYBOARD AND DISPLAY The Keyboard and Display are controlled by the software of the main CPU Board The display is a graphics LCD which displays one or both pressure ranges the units of measure and all alphanumeric information associated with each of the displayed functions The display can be placed in screen saver backlight time out mode In this mode the screen will go blank in a user addressable amount of time 1 to 999 min A stroke of any key will restore the screen display The power saver mode is recommended for battery operation Setting the display to 0 minutes turns off the screen saver backlight time out mode Operation of the PPI is locally controlled by the use of 6 function keys 4 directional keys up down left right an ENTER key and a PREVIOUS key The 6 func
70. the Main Menu press PREV until the Main Menu appears press Upper F1 or Lower F2 and then Setup F3 2 Press the up or down arrow key until the label High or Low Limit is highlighted 3 Press the Enter Key 4 Use the up and down arrow keys to scroll through a list including a decimal negative sign and numerical numbers representing the desired value 5 Use the left and right arrow keys to increment to the next digit 6 Repeat steps 4 and 5 until the entire value is entered 7 Hit the Enter key to accept the entry 8 Press PREV to exit the menu 4 4 4 2 Changing the Number of Decimals Each unit has a default number of decimal places used for pressure display based on the full scale pressure range of the transducer that is installed into the PPI This may be adjusted up or down by one decimal place 1 The decimal digits are set from the Upper or Lower Set Up Menu From the Main Menu press PREV until the Main Menu appears press Upper F1 Lower F2 and then Setup F3 Press the down arrow key until the label Decimals is highlighted Use the left and right arrow keys to change the number of decimal digits Press PREV to exit the menu 110 00 14 i EEEE 1 Figure 4 10 4 4 5 PERFORMING A LEAK TEST The PPI can perform leak tests on a system The operator can define a wait or dwell time prior to initiating the test along with a test time To perform a
71. tion keys respond to the command on the LCD display directly above each key The directional keys move the highlight bar around and change the numeric values where applicable The ENTER key accepts the current value and the PREVIOUS key returns the user to the previously displayed screen All of the operations available at the front panel can also be commanded through the RS 232 or optional IEEE 488 interface 2 5 THEORY OF OPERATION 2 2 10 THE RS 232 INTERFACE A standard feature of Ruska s Series 722X 723X Precision Pressure Indicator is an RS 232 serial data communication link This can be used for such operations as accepting commands from external systems configuring the system or sending data to remote computers Detailed operational information and a discussion of commands and dota formats for the RS 232 link are discussed in Section 5 1 2 2 2 11 THE PLUG IN INTERFACES The IEEE 488 interface is optional on the PPI It is recommended that it be installed at the factory Like the RS 232 interface it can be used for such operations as receiving commands configuring the system and sending data to external systems Detailed operational information and a discussion of commands and data formats for IEEE 488 interface are discussed in Section 5 1 1 WARNING Do not install or remove IEEE 488 or other option while power is applied to the Do not connect RS 232 or IEEE 488 cables to the PPI while power is applied to either the
72. tion with the stored coefficients and values of period and temperature to calculate the transducer s pressure 2 2 3 1 CONVERSION FACTORS Once the pressure has been calculated the factors shown in Table 2 1 are used to convert the pressure in kPa to the units requested by the user 2 2 4 THE LOGIC ARRAY FIELD PROGRAMMABLE LOGIC ARRAY One function of the logic array is to perform all of the conventional address decoding and glue logic functions normally required for support of a microcomputer As discussed above two presettable counters are also implemented in the logic array Under control of the microprocessor these counters are used to determine the frequency of the sensor s square wave output Using a single chip logic array greatly reduces the number of parts on the main circuit board and this in turn increases reliability 2 2 5 THE ANALOG TO DIGITAL CONVERTER The single chip analog to digital A D converter also includes a differential 4 input analog multiplexer One input is used to measure the amplitude of the input voltage source When this source is a battery the microcomputer is able to determine when the battery is nearing the end of its discharge cycle 2 3 THEORY OF OPERATION The entire operation of the A D converter is controlled the microcomputer and the microcomputer is the user of the A D converter s output information TABLE 2 1 CONVERSION FACTORS E ted 2 2 6 T
73. ture DATA number number VALue number TEMPerature2 Same as TEMP TEMPerature3 Same as TEMP VOL Tage DATA lt number gt lt number gt VALue number MODE ON OFF 1 0 DISPlay ENABle ON OFF 1 0 TEXT lt text gt CONTrast lt number gt TIMeout TIME lt number gt 5 1 0 STATe 1 0 5 5 PRESsure DISPlay RESolution number AUTO ONCE DISPlay2 RESolution number AUTO ONCE RANGe Sensor A UPPer UPPer number LOWer REFerence MEDium 2 AIR 5 5 Set number of triple calibration points Read date of last calibration Read time of last calibration Read date of last zero Read time of last zero Enter actual pressure for zeroing before RUN Perform zero are the same as Sensor A Sensor A temperature Set CO C1 Calibrate to value 1 point cal Sensor B temperature Oscillator temperature Battery voltage Set for Battery voltage Calibrate to value 1 point cal Request calibration edit must be on to cal or change constants Turn front panel display on off Display message on front panel Set display contrast 0 0 1 0 Backlight timeout in seconds Enable disable backlight timeout Turn backlight on off Set upper display resolution Set resolution to default Set lower display resolution Set resolution to default Read current maximum for sensor Set triple range Read p
74. y 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 efforts to have original suppliers make good their warranties aic COPYRIGHT NOTICE Copyright 1999 2000 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 to the 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 KUSKA is a trademark of Ruska Instrument C

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