DPI 145 Multi-Function Pressure Indicator - AvionTEq

1 1 USDPI145 - PDS-A022 - 7/98cdDPI 145 Multi-FunctionPressure Indicator Transfer standard accuracy reading absolute reading gauge Single or multi-channel instruments Ranges from 1 psi to 10,000 psi Application oriented processing Interchannel maths, aeronautical functions, leak test, data logging Enhanced display formats Variable text size, graphical displays Advanced sensor formats Piezo-resisitive and resonant sensor options Barometer version High accuracy, meteorological and airfield features2 USDPI145 - PDS-A022 - 7/98 DPI 145: Multi-Function Pressure Indicator Altitude, airspeed, mach and rate for aeronautical applications. Derived Pressure at mean sea level and barograph for barometric applications. QFE, QNH and 3 hour trend for airfield maths pack allows interchannel calculations such as the sum or difference of bright, clear, backlight LCD graphics display features: Display formats to suite the number of measurements and processed variables.

2 Variable text size to suite the number of values being displayed. Clear, English language operator messages and prompts. Graphical display of the power of the product, it is easy to use. Features associated with specificapplications are grouped under single command keys and the instrument is menu drivenwith clear Logging and PrintingData displays can be stored and recalled in scratchpad memory or can be output to aprinter via the serial communications powerful data logging facility allows measurements and processed variables to berecorded to files in memory, on an interval or event driven basis. Files of results can bereplayed to the display in numeric or graphical form or can be output via thecommunications port to a printer or RS 232 serial communications port is provided as standard, an IEEE 488 port isavailable as an option. The instrument communicates using the SCPI protocol communications port allows access to: All instrument configuration and setup parameters.

3 All measured and processed data. All stored results and scratchpad data can be retransmitted via the high precision analog output which can alsobe used to signal DPI 145 high accuracy, digital Pressure Indicator combines the latest inpressure sensing technology with advanced, application oriented, processing anddisplay facilities. Designed to satisfy a wide range of applications in generalindustry, meteorology, calibration laboratories, aeronautical engineering and onairfields, the DPI 145 is easily configured to the users PerformanceDigital compensation applied to micro-machined silicon sensor elements provideoutstanding performance over a wide range of pressures and resonant silicon sensors provide remarkable stability for RangeA wide range of pressures can be measured by selection from Druck s extensive rangeof can work together through auto selection to maintain performance over awider Pressure pressures can be measured directly with high precision or by combining gaugemeasurements with Pressure of the MeasurementsFrom one to four transducers can be fitted internally, two piezo-resistive sensors, andtwo resonant sensors.

4 Externally, up to ten piezo-resistive and one resonant sensor tocover a wide range of ranges up to 10,000 psi full scale in gauge, absolute and differential areavailable. All connections, pneumatic and electrical are on the rear panel of ProcessingComprehensive measurement processing is available on every channel to suit eachapplication; multiple scaling, filtering, tare, peak/trough (max and min), average, alarmsand number of application oriented processing features are provided: Leak Test. Switch 145 Schematic DiagramINLETEXTERNALSENSOR P VINLETINLET P POWER(IN/OUT)POWERSUPPLYMANIFOLDAUTO RANGING PAIR(Chan 1 & 2 option)LP (30 psi) P VHP (300 psi) P VRPT P FRPT P F[1][2][3][4][5][6]SYSTEM POWERSUPPLIES &DISPLAY HTMICROCONTROLLERSYSTEMKEYBOARDLCDGRAPHI CSPANEL8 PROCESSCHANNELSFOR DISPLAYTYPESRS 232 INTERFACEPROGRAMMABLE/ANALOG OUTPUTS& SWITCH TESTIEEE 488(option)3 USDPI145 - PDS-A022 - 7/98 DPI 145: SpecificationsIntegral Transducer SpecificationProvisions exist to fit either two independent fixed rangesensors or an autoranging sensor pair.

5 Additionally up totwo resonant sensors can be Pressure RangesPiezo-Resistive SensorsAny range can be specified between the limitslisted below:0-1 psi to 0-1000 psi gauge0-1001 psi to 0-5000 psi sealed gauge0-5 psi to 0-5000 psi to 0-500 psi differentialMaximum line Pressure 500 ranges uni-directional calibrationonly. For higher line pressures refer Pressure RangesResonant SensorsRanges as follows can be - psi absolute - barometric - psi - psi - 50 psi absoluteExternal TransducersSee details under option B for ranges availableup to 10,000 Scale UnitsPsi, , kPa, in H2O, standard - 24 differentscales under SET-UP, user Safe Working PressureTo on all ranges up to 5580 psi negligible calibration change. Fordifferential sensors consult MediaFixed ranges piezo-resistive - most commonfluids. Auto ranging version - most non-corrosive gases. Resonant sensor versions -refer to PrincipleEither integrated silicon strain gauge sensors orvibrating Resolution 999999 capability - user programmable tolower values if required.

6 17 bits ( ). Ensures resolution does not compromisethe accuracy on any scaling or ins. X ins. LCD graphics panel 240 x64 pixels. Backlit with cold cathode Range110% Pressure overrange this the display readings per second ControlPressure offset correction, by keypress. Abilityunder Indicator Process key to permitTARE of displayed EffectsFor all piezo-resistive sensors, 50 to86 Frange, average temperature coefficient of reading/ F. For resonant units,accuracy figure includes temperature Transducers AccuracyAs for internal fixed range Transducers Temperature EffectsOptions:B1 provides normal transducer temperature error bands;B2 provides enhanced coefficients as for internal SpecificationAnalog Output Voltage or CurrentProportional to selected Pressure reading 0-30mA or 0 to maximum. Programmable zero and output output configured as a supply only into approx 1Hz - updated each resolution DAC (16 bit ) Accuracy reading 1 OutputValues and performance as for analog output but as valuesdefined via the numeric InterfaceRS 232 serial data communications link for point to pointoperation fitted as standard.

7 Interfacing to a host computeror printer is via the SCPI communication ControlsVia instructions from the keypad. Access to calibration modeis under SET-UP protected by PIN number for - 80 to 260V 45 to - 9 to 32V reverse polarity and over voltage consumption - less than 10 SpecificationTemperatureOperating32 to 122 FCalibrated32 to 86 FStorage-5 to +175 FSealingFront panel generally to NEMA assembly generally to NEMA RH and VibrationDesign to meet Magnetic CompatibilityDesigned to meet EN50081-1 for emissionsDesigned to meet EN50082-1 for immunityElectrical SpecificationsWeight10 lbs. ins. high x ins. wide x ins. Connections1/8 NPT femaleOptions AvailableSee the details under the Options listing on the rearpage. The following facilities are available:(A)IEEE 488 with the SCPI protocol for communicationsinterface.(B)Ability to add external transducer to broaden theapplication range of the instrument.(C)Negative calibration for applications such as differentials.

8 (D)An Aeronautical Instrument Calibration capability providingparameter readout in feet/knots etc.(E)Airfield barometric version where QFE, QFF, QNH andrunway offsets are provided.(F)A rack mount kit is available for 19 racking giving a 3 Uhigh unit.(G)Mating connectors when accuracy figures include non linearity, hysterisis and repeatability. Regular use of the zero key for gauge and differentialmeasurements assumed. All values 1 STATIC AND 90 STATICSTATIC AND 90 DAYS STABILITY DAYS STABILITY Ranges to 1000 psiRanges over 1000 psiFIXED of reading of reading of reading of readingRANGE20% to 100% to 100% to 100% to 100% to 20% to 20% to 20% to 20% of reading of readingRANGE1% to 100% to 100% 1% 1% Note auto range 300 psig only at presentBarometric range - psi absolute Absolute psi DRUCKO ther ranges RESONANT SENSORST hese figures include linearity, hysteresisand repeatability, and temperature effectsover 50 to 86.

9 Stability over 12 months - 100 - PDS-A022 - 7/98 DPI 145: FunctionsOPERATOR CONTROLSLEAKLEAK test mode setting for unit per time Pressure drop datawith user selected timing enable the piezo-resistive sensor offsets to be access to software options when the selection of variables associated with:Units:up to 24 different Pressure scales on thefunction 232:printer or communication format output, baudrate :settings of current valuesCalibration:updates calibration via protected and data log and recalls displayed screens into to 20 named displays can be log up to 10,000 readings where a display raises between2 and 9 readings dependent on screen presentation. Numberof transferred readings over RS232 may be limited by file the screen contents via the RS 232 membrane keypad, used for all manual commands on the DPI 145multi-function Pressure Indicator , has been designed to provide theoptimum operator entry keys for value executive key which finally inputs the value , F2,Four function keys whose actual duties vary according toF3, F4the changing titles shown on the display screen immediatelyabove each mode key used for general pressuremeasurement from any of the six channels gives access torange of menu selections, channels, units, process.

10 Mode readout with the ability to access thespecific sensor being used and provide barometric unitsand access further the menus step back towards original settings when in menu levelsdeeper than test mode with display of trigger PANEL LAYOUTINTERNALTRANSDUCERINPUTSANALOGOUTP UTPRESSURESWITCH TESTFOR REMOTESENSORSSERIALCOMMUNICATIONPORTOPTI ONIEEE 488 INTERFACEDC POWERINPUTANY ACSINGLEPHASEPOWER5 USDPI145 - PDS-A022 - 7/98 DPI 145: Display and ProcessingDPI 145 SIGNAL FLOWM easurement channels- Any combination of up to four internal sensors and eleven external channels- Up to six process channels or maths operations if area- Capable of displaying up to eight parameters, either direct or via the process examples- The following examples illustrate the flexibility of the instrument s display and its processing CHANNEL8 CHANNELSDATA LOG GRAPHBAROMETERLEAK TESTSWITCH TESTSIXMEASURMENTCHANNELS(M1- M6)SIGNALPROCESSINGSIXPROCESSCHANNELS(P1 - P6)12345678 DISPLAY (8 CHANNELS MAX.)