Page 2 - Manual Print History
HPM-2002-OBEVacuum Gauge Page 2 of 39 Manual Print History The print history shown below lists the printing dates of all revisions and addenda created for this manual. The revision level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released between r...
Page 3 - Table of Contents
HPM-2002-OBEVacuum Gauge Page 3 of 39 Table of Contents 1. GENERAL INFORMATION ............................................................................................................................................ 5 1.1. F EATURES : ................................................................
Page 5 - General Information
HPM-2002-OBEVacuum Gauge Page 5 of 39 1. General Information The Hastings HPM-2002-OBE is a small, low cost electronics module which provides the user with accurate vacuum measurements over a wide range of pressure. The HPM-2002-OBE uses the same rugged HPM-2002s transducer tube as the HPM-2002 benc...
Page 6 - Specifications
HPM-2002-OBEVacuum Gauge Page 6 of 39 1.5. HPM-2002-OBE RS232/485 Output Module The RS232/485 module consists of a power conversion/sensor transducer board, microprocessor board and a user interface option board. Serial communication is conducted via an RJ-11 type connector. With RS232 option (EIA-2...
Page 8 - Initial Operation
HPM-2002-OBEVacuum Gauge Page 8 of 39 • Maximum relative humidity: 80% for temperatures up to 31°C decreasing linearly to 50% relative humidity at 40°C. • Installation category II HPM-2002-OBE CABLE PINOUT Analog Ouput Analog Ouput Digital Output Pin No. 0-10 Volt 4-20 mA RS232/485 1 High Setpoint O...
Page 9 - Operating Information; Overall Functional Description; High and Low Set Point Modes
HPM-2002-OBEVacuum Gauge Page 9 of 39 3. Operating Information This section contains information on operating the HPM-2002-OBE in any of its various configurations. Refer to the appropriate section for information on the mode in use. 3.1. Analog Output (0-10V) 3.1.1. Overall Functional Description T...
Page 11 - GAS Mode; Gas Selection Table; pressure
HPM-2002-OBEVacuum Gauge Page 11 of 39 coefficient, place the HPM-2002-OBE in the Cal mode using the SELECT button. Then turn the ADJUST rotary encoder. The Cal light will begin to flash during adjustment and will continue to flash until the Cal mode is exited using the SELECT button. To perform a f...
Page 14 - Cal Mode
HPM-2002-OBEVacuum Gauge Page 14 of 39 OBE will continuously monitor the pressure, update the alarm conditions, and update both analog output channels about ten times a second. 3.2.4. Cal Mode Optimal performance of the HPM-2002-OBE is achieved by performing in situ adjustments to the calibration co...
Page 20 - Device Status
HPM-2002-OBEVacuum Gauge Page 20 of 39 Restore Factory Defaults /#<CR> Restore Calibration Register Default Values Set Zero /0 <CR> Store Present Pressure as Instrument ZERO (if Piezo <32 Torr & Pirani <50 mTorr) Force Zero /!<CR> Override Limit Checks and Store Present P...
Page 23 - DeviceNet; DeviceNet description
HPM-2002-OBEVacuum Gauge Page 23 of 39 3.4. DeviceNet TM The HPM-2002-OBE with DeviceNet option is shown in figure below. 3.4.1. Overall Functional Description The DeviceNet module consists of a power conversion/sensor transducer board, microprocessor board and a user interface option board. All com...
Page 24 - Zero Coefficient Adjustment; Midrange Coefficient Adjustment
HPM-2002-OBEVacuum Gauge Page 24 of 39 3.5. Calibration of the HPM-2002-OBE 3.5.1. Zero Coefficient Adjustment The zero coefficient corrects for the constant power level which is present over the entire pressure range. Typically, this adjustment corrects for low pressure errors. The instrument will ...
Page 25 - Theory of Operation
HPM-2002-OBEVacuum Gauge Page 25 of 39 4. Theory of Operation The 2002s transducer tube is comprised of two very different sensors which provide a span of measurement extending from 1000 Torr down to less than 1 × 10 -4 Torr. The piezoresistive device is a direct force sensor which provides pressure...
Page 26 - Piezoresistive Sensor; dT
HPM-2002-OBEVacuum Gauge Page 26 of 39 4.2. Piezoresistive Sensor Figure 4.2 shows a typical schematic of a Boron ion implanted Wheatstone bridge network in a Si diaphragm inverted box type geometry. The inside of the box is evacuated during anodic bonding to a Pyrex substrate. The membrane has maxi...
Page 28 - Pirani Sensor; T A
HPM-2002-OBEVacuum Gauge Page 28 of 39 4.3. Pirani Sensor Figure 4.3a shows a thin metal film resistive element on a one micron thick Si 3 N 4 continuous membrane surrounded by a thin film reference resistor on a Si substrate. The membrane is heated to a constant 8 °C above ambient temperature that ...
Page 30 - Dual Sensor Operation
HPM-2002-OBEVacuum Gauge Page 30 of 39 loss is only approximately 10% of E s . If ambient changes are small compared to the absolute values of the temperature this loss can approximated as a constant with temperature. Since the first two losses are essentially constant at high vacuum for a given sen...
Page 32 - Advanced Setup Guide; KWISE
HPM-2002-OBEVacuum Gauge Page 32 of 39 5. Troubleshooting 5.1. Advanced Setup Guide The HPM-2002-OBE has several setup and control commands which can be accessed by using the ADJUST rotary encoder and SELECT pushbutton and at the same time viewing the display. Note that most of the commands, which a...
Page 34 - Frequently Asked Questions
HPM-2002-OBEVacuum Gauge Page 34 of 39 Restore Calibration r_CL Restore Calibration transfers the calibration from the HPM-2002s tube EEPROM into the HPM-2002- OBE’s CPU. EEI<CR> Restore Factory Defaults r_Fd The Restore Factory Default command is used to place calibration parameters into the ...
Page 35 - Why does my display temporarily show, “U .” as I pump the system down?
HPM-2002-OBEVacuum Gauge Page 35 of 39 communications program (e.g. WindowsÔ Hyperterminal) which can be used to communicate with RS232 versions of the HPM-2002-OBE. The Transmit Device Status (“S<CR>”) command will retrieve the HPM-2002-OBE’s status register. A successful read of the status r...
Page 36 - TOLL FREE
HPM-2002-OBEVacuum Gauge Page 36 of 39 6. WARRANTY 6.1. Warranty Repair Policy Hastings Instruments warrants this product for a period of one year from the date of shipment to be free from defects in material and workmanship. This warranty does not apply to defects or failures resulting from unautho...
Page 37 - Diagrams and Drawings
HPM-2002-OBEVacuum Gauge Page 37 of 39 7. Diagrams and Drawings
