DPI 145 - hejuest.com

1 dpi 145 - 07/981cdDPI 145 MultifunctionPressure indicator Transfer standard accuracy reading absolute reading gauge Single or multi -channel instruments Ranges from 70mbar up to 700 bar Application oriented processing Interchannel maths, aeronautical functions, leak test, data logging Enhanced display formats Variable text size, graphical displays Advanced sensor technology Piezo-resistive and resonant sensor options Barometer version High accuracy, meteorological and airfield featuresDPI 145 dpi 145 - 07/982 dpi 145 : Precision Digital pressure IndicatorINTRODUCTIONThe dpi 145 high accuracy, digital pressure indicatorcombines the latest in pressure sensing technology withadvanced, application oriented, processing and displayfacilities.

2 Designed to satisfy a wide range of applications ingeneral industry, meteorology, calibration laboratories,aeronautical engineering and on airfields, the dpi 145 iseasily configured to the users PerformanceDigital compensation applied to micro-machined siliconsensor elements provide outstanding performance over awide range of pressures and resonant silicon sensors provide remarkablestability for absolute RangeA wide range of pressures can be measured by selectionfrom Druck s extensive range of can work together through auto selection tomaintain performance over w wider pressure pressures can be measured directly with highprecision or by combining gauge measurements withpressure of the MeasurementsFrom one to six transducers can be fitted.

3 Internally twopiezo-resistive sensors, and two resonant sensors;externally one piezo-resistive and one resonant sensor tocover a wide range of applications. Up to 10 piezo-resistivesensors can be accommodated, one at a ranges up to 700 bar full scale in gauge, absoluteand differential are available. All connections, pneumaticand electrical are on the rear panel of the pressures using other manufacturer s sensors can beutilised with results as ProcessingComprehensive measurement processing is available onevery channel to suit each application: multiple scaling,filtering, tare, peak/trough (max and min), average, alarmsand number of application oriented processing features areprovided: Leak Test.

4 Switch Test. 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 capability allows interchannel calculations such asthe sum or difference of two bright, clear, backlit LCD graphics display features: Display formats to suit the number of measurements and processed variables. Variable text size to suit 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.

5 Featuresassociated with specific applications are grouped undersingle command keys and the instrument is menu drivenwith clear Logging and PrintingData displays can be stored and recalled in scratchpadmemory or can be output to a printer via the serialcommunications powerful data logging facility allows measurements andprocessed variables to be recorded to files in memory, or aninterval or event driven basis. Files of results can bereplayed to the display in numeric or graphical form or canbe output via the communications ports to a printer RS 232 serial communications port is provided asstandard, an IEEE 488 port is available as an option.

6 Theinstrument communicates using the SCPI protocol communications port allows access to: All instrument configuration and setup parameters All measured and processed data. All stored results and scratchpad data can be retransmitted via the high precisionanalogue output which can also be used to signal 145 Schematic DiagramDPI 145 - 07/983 dpi 145 : SpecificationIntegral Transducer SpecificationProvisions exist to fit either two independentfixed range sensors or an autoranging sensorpair. Additionally up to two resonant sensorscan be pressure RangesPiezo-Resistive SensorsAny range can be specified between thelimits listed below:0-70mbar to 0-70 bar gauge0-71 bar to 0-350 bar sealed gauge0-350mbar absolute to 0-350 bar absolute0-175mbar differential to 0-40 bar differentialMaximum line pressure 35 barDifferential ranges uni-directional calibrationonly.

7 For higher line pressure please refer pressure RangesResonant SensorsRanges as follows can be specified:800-1150mbar absolute - barometric range35-1300mbar absolute35-2600mbar absolute35-3500mbar absoluteExternal TransducersSee details under option B for rangesavailable up to 700 Scale UnitsBar, psi, mH2O, kPa standard - 24 differentscales under SET-UP, user selectableMaximum Safe Working PressureTo an all ranges up to 385 bar negligible calibration differential sensors consult MediaFixed ranges piezo-resistive - most commonfluids. Auto ranging version - most noncorrosive gases. Resonant sensor versions -refer to PrincipleEither integrated silicon strain gauge sensorsor vibrating Resolution 999999 capability - user programmable tolower values if required.

8 17 bits ( ). Ensures resolution does notcompromise the accuracy on any scaling mm x 132 mm LCD graphics panel240 x 64 pixels. Backlit with cold cathode Range110% pressure overrange this the display readings per second ControlPressure offset correction by under indicator Process key topermit TARE of displayed EffectsFor all piezo-resistive sensors, 10 to30 C range, average temperature coefficient of reading/ C. For resonant units,accuracy figure includes temperature TransducersAccuracyAs for internal fixed range sensors, exceptB3 (as found).External TransducersTemperature EffectsOptions:B1 provides normal transducer temperatureerror bands;B2 provides enhanced coefficients as for internal as SpecificationAnalogue Output Voltage or CurrentProportional to selected pressure reading0-30mA or 0 to 10V zero and output output configured as a supply onlyinto passive approx 1 Hz - updated resolution DAC (16 bit ).

9 Accuracy of reading 1 OutputValues and performance as for analogueoutput but as values defined via the InterfaceRS 232 serial data communications link forpoint to point operation fitted as to a host computer or printer isvia the SCPI communication ControlsVia instruction from the keypad. Access tocalibration mode is under SET-UP protectedby PIN number for - 80 to 260V 45 to 400 - 9 to 32V reverse polarity and overvoltage consumption - less than 10 wattsEnvironmental SpecificationTemperatureOperating 0 to +50 CCalibrated 0 to +30 CStorage -20 to +70 CSealingFront panel to IP assembly to RH and VibrationDesigned to meet Magnetic CompatibilityDesigned to meet EN50082-1 for emissionsDesigned to meet EN50082-1 for immunityElectrical mm high x 290 mm wide x 250 mm ConnectionsG1/8 (female).

10 Options AvailableSee the details under the Options listing on therear page. The following facilities are available.(A) IEEE 488 with the SCPI protocol for communications interface.(B) Ability to add external transducer to broaden the application of the instrument.(C) Negative calibration for applications such as differentials.(D) An Aeronautical Instrument Calibration capability providing parameter readout in feet/knots etc.(E) Airfield barometric version where QFE, QFF, QNH and runway offsets are provided.(F) A rack mount kit is available for 19 racking giving a 3U high unit.