Instruction/ maintenance manual of the product HPM-2002-OBE Teledyne
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INSTRUCTION MANUAL HPM-2002-OBE VACUUM GAUGE TELEDYNE HASTINGS INSTRUMENTS ISO 9001 CER TIFIED.
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 al phabetically as the manual undergoes subsequent updates.
HPM-2002-OBEVacuum Gauge Page 3 of 39 Table of Contents 1. GENERAL INFOR M AT ION ........................................................................................................ .................................... 5 1.1. F EATURES : ........
HPM-2002-OBEVacuum Gauge Page 4 of 39 4.4. D UAL S ENSOR O PERATION .............................................................................................................................. .... 30 5. TROUBLESHOOT ING ............................
HPM-2002-OBEVacuum Gauge Page 5 of 39 1. General Information The Hastings HPM-2002-OBE is a small, low co st 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 bench top instr ument.
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, micropro cessor board and a user interface option board. Se rial communication is conducted via an RJ-11 type connector.
HPM-2002-OBEVacuum Gauge Page 7 of 39 2. Inst allation This section is designed to assist in getting a new pr essure gauge into operation as quickly and easily as possible. Please read the following inst ructions thoroughly before inst alling the instrument.
HPM-2002-OBEVacuum Gauge Page 8 of 39 • Maximum relative humidity: 80% for temperatures up to 31°C decreasing linearl y to 50% relative humidity at 40°C. • Installation category II HPM-2002-OBE CABLE PINOUT Analog Ouput Analog Ouput Digital Output Pin No.
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 approp riate section for information on the mode in use . 3.1. Analog Output (0-10V) 3.
HPM-2002-OBEVacuum Gauge Page 10 of 39 3.1.3. Run Mode The HPM-2002-OBE will automatically e nter the Run mode upon start-up . This is the mode for normal operation and the mode in which the instrument will sp end most of its time.
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 ad justment and will continue to flash until the Cal mod e is exited using the SELECT button.
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HPM-2002-OBEVacuum Gauge Page 13 of 39 3.2. Analog Output (4-20mA) The HPM-2002-OBE with analog outp ut and display is shown in the figure below. The user interface consists of a status bar, a mode bar, and setpoint test jacks. 3.2.1. Overall Functional Description The status bar gives information about the conditi on of the HPM-2002-O BE .
HPM-2002-OBEVacuum Gauge Page 14 of 39 OBE will continuously moni tor the pressure, update th e 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 achieve d by performing in situ adjustments to the calibration coefficients in the Cal mo de.
HPM-2002-OBEVacuum Gauge Page 15 of 39 To perform a full calibration o n the HPM-2002-OBE, first use the Zero Coeff icient Adjustment Procedure. Followed by the Midrange Coeff icient Adjustment Proc edure, and finally perform the Atmosphere Coefficient Adjustment Procedure.
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HPM-2002-OBEVacuum Gauge Page 17 of 39 3.3. RS232/485 With Display The HPM-2002 -OBE with RS232/ 485 outp ut and display is sh own in the figure below. The user interface consists of 4-digit LED display, a status bar, and a mode bar. 3.3.1. Overall Functional Description The status bar gives information about the conditi on of the HPM-2002-O BE .
HPM-2002-OBEVacuum Gauge Page 18 of 39 The characters within wavy brackets { } cont ain choices for the appropriate command. The characters within the symbols < > ar e the common abbreviations for the one digit ASCII control codes which they represent, (e.
HPM-2002-OBEVacuum Gauge Page 19 of 39 The setpoints may also be entered as a decimal number, e.g. [H=7 60.99<CR>] will be same as entering [H=7.6099E+ 2<CR>] . When inputting setpoint data, it should be entered in the same Units of Pressur e as the presently selected Units of Measurement (i.
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 r e s s u r e a s I n s t r u m e n t Z E R O 3.
HPM-2002-OBEVacuum Gauge Page 21 of 39 3.3.9. Modular Connector P inout (R2-232) RJ-1 1 connector on left side. Pin #1 .............................................................................. Ready to receive (output signal from OBE) Pin #2 ....
HPM-2002-OBEVacuum Gauge Page 22 of 39 During normal operation the alarm light will illuminate a nd the TTL output (pin # 2) will go high (+5V) if the pressure becomes less than the set point. To view the setpoint using the serial connection, send “L<CR>”.
HPM-2002-OBEVacuum Gauge Page 23 of 39 3.4. DeviceNet TM The HPM-2002-OBE with DeviceNet option is shown in figure belo w. 3.4.1. Overall Functional Description The DeviceNet module consists of a power conversion /sensor transducer board, m icroprocessor board and a user interface option board.
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 leve l which is present over the entire pressure range. Typically, this adjustment corrects fo r low pressure errors.
HPM-2002-OBEVacuum Gauge Page 25 of 39 4. Theory of Operation The 2002s transducer tube is comprised o f two very different sensors which provide a span of me asurement extending from 1000 Torr down to less than 1 × 10 -4 Torr.
HPM-2002-OBEVacuum Gauge Page 26 of 39 4.2. Piezoresistive Sensor Figure 4.2 shows a typical schematic of a Boron io n implanted Wheatstone bridge network in a Si diaphragm inverted box type geom etry. The inside of the box is evacuated during anodic bonding to a Pyrex substrate.
HPM-2002-OBEVacuum Gauge Page 27 of 39 Figure 4.2.
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 resi stor on a Si substrate. The membrane is heated to a constant 8 °C above ambient temperature that is monitore d by the substrate resistor.
HPM-2002-OBEVacuum Gauge Page 29 of 39 This radiation loss is also independent of the thermal conductivity of the gas. It is somewhat dependent upon the absolute temperature of R s and the ambient temperature, but since ∆ T is kept to less than 20 °C, this Figure 4.
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.
HPM-2002-OBEVacuum Gauge Page 31 of 39 Figure 4.4.
HPM-2002-OBEVacuum Gauge Page 32 of 39 5. T r oubleshooting 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 viewin g the display.
HPM-2002-OBEVacuum Gauge Page 33 of 39 Baud Rate B_2.4 B_2.4, B_4 .8, B_9.6, B_19 .2, B_38.4, B_57 .6, B_125, B_250 , B_500 The baud rate is given in kbaud. For ex ample, B_9.6 c orresponds to a 9600 baud. Note: There is no equi valent RS232/485 comm and.
HPM-2002-OBEVacuum Gauge Page 34 of 39 Restore Calibrat ion r_CL Restore Calibration transfers the calibration fr om the HPM-2002s tube EE PROM into the HPM-2002- OBE’s CPU. EEI<CR> Restor e Factory Def ault s r_Fd The Restore Factory Default command is used to place calibration parameters into the CPU.
HPM-2002-OBEVacuum Gauge Page 35 of 39 communications program (e.g. Windows Ô Hyperterminal) which can be used to communicate with RS232 versions of the HPM-2002 -OBE. The Transmit De vice Status (“S<CR>”) command will retrieve the HPM-2002-OBE’s status register.
HPM-2002-OBEVacuum Gauge Page 36 of 39 6. W ARRANTY 6.1. Warranty Repair Policy Hastings Instruments warrants this produc t for a period of one ye ar from the date of shipment to be free from defects in material and work manship.
HPM-2002-OBEVacuum Gauge Page 37 of 39 7. Diagrams and Drawings.
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An important point after buying a device Teledyne HPM-2002-OBE (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Teledyne HPM-2002-OBE yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Teledyne HPM-2002-OBE - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Teledyne HPM-2002-OBE you will learn all the available features of the product, as well as information on its operation. The information that you get Teledyne HPM-2002-OBE will certainly help you make a decision on the purchase.
If you already are a holder of Teledyne HPM-2002-OBE, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Teledyne HPM-2002-OBE.
However, one of the most important roles played by the user manual is to help in solving problems with Teledyne HPM-2002-OBE. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Teledyne HPM-2002-OBE along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
