GE Sensing Applications Features GE Sensing is a world leading manufacturer of precision • Pressure ranges up to 10,000 psi (700 bar) pressure instruments based upon it’s own piezoresistive and resonant silicon sensor technologies. The Druck • Precision 0.025% of reading DPI 145 combines these in a high precision pressure indicator which is very flexible and simple to operate. It is • Precision barometric reference designed to address a wide range of applications in • Internal or external sensors workshops and laboratories throughout industry. • Split-screen LCD display • Data storage, RS 232 and IEEE 488 DPI 145 Multifunction Pressure Indicator DPI 145 is a Druck product. Druck has joined other GE high-technology sensing businesses under a new name—GE Industrial, Sensing. g GE Sensing A wide range of pressures up to 10,000 psi (700 bar) can Innovation be measured from an extensive choice of sensors. For example, resonant silicon sensors provide high precision Sophisticated measuring and processing technology is and exceptional long term stability for absolute pressure incorporated into one compact, functional instrument. measurements up to 50 psi (3.5 bar). A sensor auto- Advanced software and a large, self formatting “split- selection feature enhances performance over the popular screen” display are among the many features which range of -14.5 to 300 psi (-1 to 20 bar) gauge using a make the DPI 145 one of the most flexible indicators on matched “auto ranging” pair of piezoresistive sensors. the market. Simplified operation and proven electronics ensure highly reliable service. Absolute pressures can also be measured directly with piezoresistive sensors, or by combining gauge Multiple measurements can be made simultaneously with measurements with barometric pressure from a resonant a combination of up to six internal/external pressure sensor. This versatility enables cost and performance to sensor outputs being continuously monitored. Physically, be optimized. special attention has been given to ensure suitability for bench use with a rotatable handle providing both a comfortable viewing angle during operation and a Processing convenient carrying grip for portability. Comprehensive functions are available on all channels: • Multiple scaling Measuring • Filtering, average and tare values • Max/min value capture and alarms GE's ability to design and manufacture both sensor and • Flow (square root pressure value) instrument has resulted in a powerful combination of • Leak and pressure switch test silicon sensors and digital compensation. • Interchannel maths capability Compact and rugged casing Split-screen graphics display for multi parameter readout Display mode selector keys Screen print via RS 232 interface Notepad and datalog facility Four "soft" function keys driven by display prompts Numeric data entry keys Rotatable carrying handle for convenient benchtop use GE Sensing The display screen may be split to suit the required Versatility number of measurement or process variables up to a maximum of eight displays. Features associated with The DPI 145 multi-function indicator covers a wide range specific applications are grouped under single keys. of gauge, absolute and differential pressure ranges from 0.4 in H O to 10,000 psi (1 mbar to 700 bar) full scale. For 2 both pneumatic or hydraulic measurements, up to six Quality sensors may be connected to the instrument simultaneously with a maximum of four internal and two GE Sensing is ISO 9001 approved, with all instruments external sensors. manufactured to strict quality control procedures and calibrated against traceable reference standards. Full The four internal channels enable two piezoresistive and UKAS certification is also available. two resonant pressure sensors to be connected. In addition, the instrument can store the characteristics of Simplicity up to 10 external pressure sensors, with a maximum of one piezoresistive and one resonant silicon type to be The DPI 145 is simple to operate, even to those unfamiliar used at any one time. with electronic pressure instrumentation. The intuitive menu-style software allows quick selection of the Split-Screen Display required function, ensuring that measurements and associated data processing can be achieved with ease The backlit LCD graphics display is bright and clear for and confidence. easy viewing and automatically configures itself for single or split-screen readouts. The display splits and Installation formats itself to the optimum viewing size for the number of functions the user requires to display. All functions, The DPI 145 is designed for convenient bench top use. A messages, prompts and menus are clearly presented and rotating handle is fitted as standard, providing a the DPI 145 can generate graphical displays using stored comfortable viewing angle for the operator. An optional data from its extensive memory to simplify interpretation rack mounting kit provides a 5.25 in (134 mm) high and to provide quick and easy trend analysis. (3U) x 19 in (483 mm) wide unit for standard rack installation. Powerful Data Processing Precision Comprehensive measurement processing is available on every channel to suit numerous applications including The DPI 145 offers high precision. By utilizing Druck multiple scaling (selectable from 24 different units), data piezoresistive sensors, 0.025% of reading is standard for filtering, tare, peak/valley, average and alarms. pressure measurements from 3 to 1000 psi (201 mbar to 70 bar) and 0.04% of reading for pressures up to 10,000 Operating Modes psi. The DPI 145 may be used in various modes of operation For gauge, differential and absolute pressures below each with its own dedicated list of menu functions 3 psi (201 mbar), the measurement precision is up to specific to the required task. The instrument is fully 0.05% of reading. configurable and any input channel may be specified for all of the following modes: For barometric and low pressure absolute measurements, the DPI 145 can be supplied with Druck Indicator resonant pressure sensors. These are the aerospace In this mode, the instrument displays any of the pressure industry standard, providing precision measurement of inputs simultaneously on screen. All standard scale units 0.013% full scale and long term stability of better than are available for each individual pressure readout. 0.01% per year. Process or mathematical functions can be applied as By the use of digital characterization routines, the DPI separate displays, each may be renamed for appropriate 145 not only improves the basic precision of the sensors use or location. Up to eight pressure/process values may but also enhances temperature performance over 50°F to be displayed at any one time in this mode. The instrument 86°F (10°C to 30°C). can also display time by selecting the clock feature. GE Sensing Barometer Data Logging and Printing The DPI 145 may be used as a dedicated high precision A powerful data logging facility enables measurements barometer. Example functions include standard and processed variables to be saved to files that can barometric units, three hour trend analysis with graphical then be replayed on the display in numerical or graphical output, selection of QFE or QNH for airfield applications. form. Displays can also be recalled from the notepad memory or, alternatively, sent to a printer or PC via the RS 232 serial communications port. Leak Test The dedicated leak test screen simplifies the calculation Up to 20 named displays can be accommodated. The of system leak rates. This is particularly effective for instrument will data log up to 10,000 readings dependent conforming system integrity or automated leak test on screen presentation. The number of transferred applications. The test wait and test time can be specified readings via RS 232 may be limited by file size. and the leak rate in units/minute over the test period. Aeronautical Option Switch Test The DPI 145 can provide the facility to operate directly in The instrument can automatically register the change standard aeronautical units, automatically converting state of a connected pressure switch via a rear panel pressure measurements to readings of altitude and connector. During a pressure switch test cycle, the airspeed as defined by standard ICAO conversions. contact open and close pressure values are displayed Features include altitude readout in feet and meters, and the switch hysteresis calculated. altitude tare, calibrated airspeed in knots and km/hr, mach, rate of climb (RoC) and timed RoC, total and static Instrument Set-Up pressures, and QC differential pressure. In addition, this Selection of the “Set-Up” key enables variable parameters option enables leak and switch tests in aeronautical units. such as Pressure Scale Units (24 available), RS 232 format (printer or communication output, baud rate etc), time/date values and instrument Calibration Data (updated via a protected system). GE Sensing Interfacing Communication An RS 232 serial digital interface is supplied as standard in the DPI 145, allowing easy remote control for integrated computer-driven systems. The popular SCPI protocol (Standard Commands for Programmable Instruments) is used to provide standardization with other instruments. IEEE 488 communications are also available. Please refer to the options list on the back page. Analog Output The DPI 145 is supplied with a programmable analog output. This may be assigned to any individual channel or display and set to provide an output between 0 to 30mA or 0 to 10 volts, over a user-defined range. Remote Sensors In addition to standard internal pressure sensors, the DPI 145 can be calibrated for use with up to 10 (one at a time) external piezoresistive sensors and one resonant sensor. This covers a wide variety of pressure ranges from 0.4 in H O to 10,000 psi (1 mbar to 700 bar) 2 including gauge, absolute and differential. All external sensors are supplied with a mating connector for direct interfacing with the instrument. Please refer to the options list on the back page. Connections All pneumatic and electrical connections are on the rear panel for neat and easy installation. The layout is shown below. Up to two internal piezoresistive* Up to two internal resonant sensor inputs and references sensor inputs and references AC (single phase) power input Power on/off switch DC power Analog Output input Pressure Remote sensor Standard RS Optional IEEE switch test inputs 232 interface 488 interface *Note: For each piezoresistive sensor the reference is brought out to the rear panel for connection as a differential input. GE Sensing Display 1.5 in x 5 in (39 mm x 132 mm) LCD graphics panel with DPI 145 240 x 64 pixels. Backlit with cold cathode tube. Display Range Specifications Nominally up to 110% FS. Above this value, display flashes. Pressure Scale Units Pressure Measurement psi, bar, in H O, kPa standard, 24 different user selectable 2 scales Internal Sensors Two independent fixed range piezoresistive silicon sensors Response or an autoranging sensor pair can be fitted. Additionally, Two readings per second maximum up to two resonant silicon sensors can be accommodated. Readout Resolution Internal Piezoresistive Ranges ±999999 capability, user programmable to lower values if Any full scale range can be specified between: required. 17 bits (0.00075% FS). Resolution will not limit • 1 to 1000 psi (70 mbar to 70 bar) gauge accuracy on any scaling or range. • 1001 to 5000 psi (71 to 350 bar) sealed gauge • 5 to 5000 psi (350 mbar to 350 bar) absolute • 2.5 to 500 psi (175 mbar to 40 bar) differential Performance Note: Differential ranges standard line pressure 30 psi Piezoresistive Sensors 0 to 3 psi (0 to 200 mbar) (2 bar), 500 psi (35 bar) (available on request). Unidirectional Static precision ±0.05% rdg* for values 20% to 100% FS calibration standard, Option (C) for bidirectional. ±0.01% F.S.* for values 0% to 20% FS Autoranging pair: -14.5 to 300 psi (-1 to 20 bar) (includes 2 *12 month stability 0.25% Rdg. piezoresistive sensors). Piezoresistive Sensors, 3 to 1000 psi (201 mbar to 70 bar) Internal Resonant Sensor Ranges Static precision ±0.025% rdg* for values 20% to 100% FS The following ranges: ±0.005% F.S.* for values 0% to 20% FS • 11 to 17 psi (750 to 1150 mbar) absolute (barometric) *12 month stability 0.12% Rdg. • 0.5 to 19 psi (35 to 1300 mbar) absolute • 0.5 to 38 psi (35 to 2600 mbar) absolute Piezoresistive Sensors, Ranges over 1000 psi (70 bar) • 0.5 to 50 psi (35 to 3500 mbar) absolute Static precision ±0.04% rdg* for values 20% to 100% FS ±0.008% FS* for values 0% to 20% FS External Transducers *12 month stability 0.2% Rdg. Ranges available from 0.4 in H O up to 10,000 psi 2 (1 mbar to 700 bar). Please refer to option (B) for details. Auto Range Sensors, Range -14.5 to 300 psi (-0.1 to 20.0 bar) Safe Working Pressure Static precision ±0.025% rdg* for values 1% to 100% FS Maximum 1.5 x FS for all ranges up to 5580 psi (385 bar) ±0.00025% FS* for values below 1%FS with negligible effect on calibration. *12 month stability 0.01% Rdg. Pressure Media *Note: The above values include non-linearity, hysteresis • Autoranging pair: any clean, dry, non-corrosive gas. and repeatability. Temperature effects 0.002% Rdg/°C over • Internal piezoresistive sensors: any gas or fluid the range of 50°F to 86°F (10°C to 30°C). All values ±1 digit. compatible with 316L stainless steel and Hastelloy C276. For gauge and differential units, regular use of the zero key • Internal resonant sensors: any gas compatible with is assumed. silicon, glass, 316L stainless steel, titanium and epoxy. • External sensors (where specified): refer to separate sensor datasheet. GE Sensing Physical DPI 145 Weight 10 lb (4.6 kg) nominal Specifications Dimensions (w x h x d) 4 in x 11 in x 10 in (110 mm x 290 mm x 250 mm) approx. Pressure Connections Resonant Sensors 1/8 (Female BSP) Barometric range 11 to 17 psi ±0.002 psi (750 to 1150 mbar absolute ±0.15 mbar). All other ranges ±0.013% FS Options These figures include non-linearity, hysteresis, repeatability, and temperature effects over 50°F to 86°F (A) IEEE 488 (GPIB) Interface (10°C to 30°C). 12 month measurement stability better than Full computer control is available via a databus 100ppm. using the SCPI protocol. The standard IEEE parallel D connector is provided on the rear panel and all Electrical standard front panel facilities remain accessible. Analog Output (B) External Pressure Sensors Proportional to selected pressure reading as either 0 to In addition to internal sensors, the DPI 145 can be 30mA or 0 to 10 Vdc max. Zero and FS output values are calibrated for use with 10 (one at a time) external user programmable. Accuracy ±0.025% rdg ±0.01% FS ±1 piezoresistive sensors and one resonant type sensor. digit. These are supplied assembled with mating 12 pin connector for direct interfacing with the instrument. Communications Interface Cable lengths up to 33 ft (10 m) for piezoresistive RS 232 serial data port fitted as standard. Communication sensors and 6.6 ft (2 m) for resonant sensors. with a host computer or printer is via the SCPI protocol. Any full scale can be specified between the ranges Power Supply listed below: A.C. 80 to 260 V, 45 to 400 Hz or d.c. 9 to 32 V. Reverse • 0-1 psi to 0-1000 psi (70 mbar to 70 bar) gauge polarity and over voltage protected. Power consumption • 0-1 psi to 0-1000 psi (71 mbar to 70 bar) sealed gauge <20 watts. • 0-5 psi to 0-10,000 psi (350 mbar to 700 bar) absolute • 0-2.5 psi to 0-580 psi (175 mbar to 40 bar) differential* Environmental *Maximum line pressure 30 psi (2.0 bar). 40 psi (3.0 bar) available on request. Unidirectional Temperature calibrations only. • Calibrated 50°F to 86°F (10°C to 30°C) (B1) Specifies normal piezoresistive transducer • Operating 32°F to 122°F (0°C to 50°C) temperature error bands. Refer to relevant • Storage -4°F to 160°F (-20°C to 70°C) sensor datasheet. (B2) Specifies enhanced temperature coefficients for Sealing internal sensors. Front panel to IP54. Case assembly to IP41 (B3) Any non-standard sensor complete with calibration certificate as found or low pressure Humidity LPE sensor calibration. Full scale range available 0 - 90% RH non-condensing for LPE 9145: 0.4 in H O to 20 in H O 2 2 gauge/differential (1 to 50 mbar) Shock and Vibration Other ranges available on request. Designed to meet IEC1010 (C) Negative Calibration Electro Magnetic Compatibility Calibration of bi-directional channels is usually in the • Emissions EN50081-1 positive direction only. If negative direction • Immunity EN50082-1 calibrations are required this option should be requested and corresponding instrument channel Electrical Safety specified. IEC1010 Note: Auto range provides -14.5 psi (-1.0 bar) calibration as standard. GE Sensing Related Products DPI 145 GE Sensing manufactures a comprehensive range of pressure indicators, controllers, calibrators, deadweight testers, transducers and transmitters. Specifications (D) Aeronautical Units Additional facilities for the testing of altitude and airspeed instrumentation. Converts linear pressure values into the non linear values of feet, meters, Rate of Climb, knots, km/hr and Mach number. Altitudes from -2,000 to 100,000 ft and airspeeds from 0 to 1000 knots can be measured. (E) Airfield Barometer Software capability for providing barometric pressure displayed for QFE, QNH and QFF where datum heights and runway heights are given. (F) Rack Mount Rack mounting kit that provides a 3U (5.24 in (133 mm) high plate into which the instrument is mounted and clamped. Suitable for installation into standard 19 in (480 mm) wide rack systems. (G) Connectors If mating connectors are required the following should Ordering Information be requested: (G1) specifies 12 Way LEMO - external sensors Please state the following (where applicable): (for spares) 1 Model number. (G2) specifies 9 Way ‘D’ type - RS 232 2 Pressure range(s). (G3) specifies BNC x 2 for I/V output and switch input 3 Gauge, sealed gauge, absolute or differential. (G4) specifies 3 way LEMO for d.c. input. 4 Options. 5 When external sensor is required: (a) Pressure range and scaling Supplied as Standard (b) Gauge, sealed gauge, absolute or differential (c) Transducer type, from approved list An AC power connector/power lead, handbook and (d) Temperature range for sensor calibration certificate are supplied as standard with the (e) Pressure connection instrument. For non-standard requirements, please refer to manufacturer. Calibration Standards Continuing development sometimes necessitates Instruments manufactured by GE are calibrated against specification changes without notice. precision pressure calibration equipment, which is traceable to the International standards. ©2006 GE. All rights reserved. 920-399A All specifications are subject to change for product improvement without notice. www.gesensing.com ® GE is a registered trademark of General Electric Co. 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