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Teledyne 2002 manual

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Table of contents for the manual

  • Page 1

    INSTRUCTION MANUAL MODEL 2002 VACUUM GAUGE TELEDYNE HASTINGS INSTRUMENTS ISO 9001 CER TIFIED[...]

  • Page 2

    149-072011 Mod el 2002 Vacuum Gauge Page 2 of 38 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 underg oes subsequent updates. Addenda, which are released between revisions, contain important change inf[...]

  • Page 3

    149-072011 Mod el 2002 Vacuum Gauge Page 3 of 38 Table of Contents 1. GENERAL INFO RMATIO N ......................................................................................................................................... 4 1.1. F EATURES .......................................................................................................[...]

  • Page 4

    149-072011 Mod el 2002 Vacuum Gauge Page 4 of 38 1. General Information The Model 2002 is a wide range vacuum measuring in st rument consisting of a digital microprocessor-based display unit, a miniature, rugged, th in film based sensing element that measures from below 1x10-4 up to 100 Torr, a pi ezoresistive sensor that measures fro m 1 to 1000 T[...]

  • Page 5

    149-072011 Mod el 2002 Vacuum Gauge Page 5 of 38 board is also available. The Model 2002 instrume nt accepts an external TTL level "Remote Zero" to zero the instrument when another instrument (e .g. an ion ga uge) indicates that the pressure is less than 1x10-5 Torr. The standard analog output is linear per decade di rectly corresponding [...]

  • Page 6

    149-072011 Mod el 2002 Vacuum Gauge Page 6 of 38 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. 2.1. Receiving Inspection Carefully unpack the Hastings Model 2002 Instrument (p[...]

  • Page 7

    149-072011 Mod el 2002 Vacuum Gauge Page 7 of 38 2.4. Control Unit Installation • Environment: • Indoor use • Altitude up to 2000 meters • Operating temperature range from 50 to 400C • Maximum relative humidity: 80% for temperatures up to 310C de creasing linearly to 50% relative humidity at 400C • Installation category II Panel Mount I[...]

  • Page 8

    149-072011 Mod el 2002 Vacuum Gauge Page 8 of 38 3. Front Panel Operation 3.1. Overall Functional Description The front panel of the control unit is shown in Figure 3. 1. The four circular blue buttons are used for the selection of display readout and the input of data. The green data field displays the data as determined by mode selection. The MOD[...]

  • Page 9

    149-072011 Mod el 2002 Vacuum Gauge Page 9 of 38 Scientific Notation The Model 2002 measures pressure that spans mor e than seven decades. In order to easily display these readings, Hastings Instruments has employed scientific notation. In scientific notation, the mantissa (the fixed point part) is multiplied by some power of 10 (given by the expon[...]

  • Page 10

    149-072011 Mod el 2002 Vacuum Gauge Page 10 of 38 This will not correct the calibration if the tube has become contamina ted or damaged. This reset will not affect the gas selectio n, units or setpoints. Also see unit’s mode for def ault calibration restoration. 3.3. High and Low Set Point Modes The Model 2002 provides TTL outputs for process con[...]

  • Page 11

    149-072011 Mod el 2002 Vacuum Gauge Page 11 of 38 An important point to be noted is the fact that after th e adjustment, the new calibration coefficient is only in temporary memory. I f the instrument were unplu gged at this point, it would revert back to the original displayed value upon restarting. Place the Model 2002 back in the RUN mode to st [...]

  • Page 12

    149-072011 Mod el 2002 Vacuum Gauge Page 12 of 38 3. Place the instrument in the C AL mode, then sim ultane ously press the UP and DOW N switches to bypass the interlock. The CAL light will start to flash indicating that the calibration mode has been activated. 4. Press the ZER O switch once if below 6x10 -5 Torr othe rwise use the UP and DOWN swit[...]

  • Page 13

    149-072011 Mod el 2002 Vacuum Gauge Page 13 of 38 light will now flash. Use the UP and DOWN switches to individually select the de sired code. Return the Model 2002 to the RUN mode. Note: Factory calibration is performed using nitrogen on ly. Displayed pressure measurements using other gases are based on established gas th ermal conductivity data. [...]

  • Page 14

    149-072011 Mod el 2002 Vacuum Gauge Page 14 of 38 4. Rear Panel Description A schematic of the rear panel of the Mo del 2002 contro l unit is shown in Figure 4.2 ( Rear Pa nel Figure). The transducer is connected to the co ntrol unit via an female 9-pin “D” connector on the rear panel. An I/O cable can be connected via a male 9-pin “D” conn[...]

  • Page 15

    149-072011 Mod el 2002 Vacuum Gauge Page 15 of 38 If the analog output voltage is being used in a data ac quisition system, the followin g formulas can be used to calculate pressure. Therefore, Note that the INT function simply retu rns to the first digit in a number. Examples: INT (2.56) = 2 INT (9.87) = 9 ---------- -------- ---------- ----------[...]

  • Page 16

    149-072011 Mod el 2002 Vacuum Gauge Page 16 of 38 4.3. TTL Outputs TTL outputs are provided for pr ocess control. High and Low set p oints are entered on the front panel (se e Section 3.4) and TTL signals are generated on the I/O cable in the following manner: 1. When the pressure as indicated by the Model 2002 is above the High set point, the High[...]

  • Page 17

    Analog 0- 10V OPTION BOARD CONNECTOR Pin# Connection 1 Analog Out 1 (1024 To rr) High 2 Analog Ou t 1 (1024 Torr) Shield 3 Analog Ou t 1 (1024 Torr) Low 4 5 6 7 Analog O ut 2 (100 0 mTorr) L ow 8 Analog Out 2 (10 0 0 mTorr) Hi gh 9 Analog O ut 2 (100 0 mTorr) S hield 4-20mA OPT ION BOARD CONNECTOR Pin# Connection 1 I-Loop Out (+) 10 24 Torr 3 I-Loo[...]

  • Page 18

    5. Theory of Operation The Model 2002 transducer is comprised of two very d ifferent sensors which provi de a span of measurement extending from 1000 Torr down to less t han 1x10-4 Torr . The piez oresistive device is a direct force sensor which provides pressure indication from 1000 Torr down to less than 1 Torr. The thin film Pirani device is a t[...]

  • Page 19

    149-072011 Mod el 2002 Vacuum Gauge Page 19 of 38 To insure temperature invariance, Therefore This requires for any change in sensitivity to be co untered by an equal but opposite change in applied voltage. The temperature compensation is a network of temperature dependent resistive components and fixed temperature compensation current source compe[...]

  • Page 20

    149-072011 Mod el 2002 Vacuum Gauge Page 20 of 38 5.2. Pirani Sensor Figure 5.3a shows a thin film Pt resistive element on a one micron thick Si 3 N 4 continuous memb rane surrounded by a thin film Pt referenc e resistor on a Si substrate. The membrane is heated to a constant 8 0 C above ambient temperatur e that is monitored by the substrate resis[...]

  • Page 21

    149-072011 Mod el 2002 Vacuum Gauge Page 21 of 38 Since the first two losses are essentially constant at high vacuum for a given sensor, we can measure these losses and subtract them from the input power which leav es only the rate of he at transmission through the gas (E g ). In the viscous flow regime, the Eg loss is directly depe ndent on the th[...]

  • Page 22

    149-072011 Mod el 2002 Vacuum Gauge Page 22 of 38 Ta = ambient temperature P = pressure Ag = surface area of the heated portion of the membrane For nitrogen at a pressure of 760 To rr and a temperatur e of 20°C the mean free path (l) is less than 1 x 10-7 meters and is inversely prop ortional to pressure. Since the thermal transfer distance (Dx) i[...]

  • Page 23

    149-072011 Mod el 2002 Vacuum Gauge Page 23 of 38 6. Communications Option Board Both RS-232 and RS-485 communicatio n interface boards are available as an option for the Model 2002. The communication option boards allow data to be output to a host comp uter with the appropriate interface. Connection to the RS-232 or RS-485 communication interface [...]

  • Page 24

    149-072011 Mod el 2002 Vacuum Gauge Page 24 of 38 6.1.1. Interface C onnector Pin Assignments for RS-485 (Full duplex-4 wire)(Jumper position 2-3). 6.1.2. For RS-485 (Half Du plex – 2 wire) (Jumper position 1-2). 6.2. Interface Connector Pin Assignments for RS-232 Note: an alternate method of connecting to a 2 wire bu s is to leave the interface [...]

  • Page 25

    149-072011 Mod el 2002 Vacuum Gauge Page 25 of 38 When a lower case character is present in an example it r epresents an option. C h a r a c t e r D e s c r i p t i o n V a l i d I n p u t s : a RS-485 Address (hexadec imal 0-9, A-F) ........................................................ 01 - FF m Most Significant Digi t Of Manti ssa.............[...]

  • Page 26

    149-072011 Mod el 2002 Vacuum Gauge Page 26 of 38 Notes: 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.e. Torr, mbar or Pascal). T[...]

  • Page 27

    149-072011 Mod el 2002 Vacuum Gauge Page 27 of 38 Reset / Restore Commands C o m m a n d D e s c r i p t i o n F o r m a t N o t e s : Escape <Esc> ....................................................................... Rese t Command Buffer ....................................................................................... (Ignore pr ior[...]

  • Page 28

    149-072011 Mod el 2002 Vacuum Gauge Page 28 of 38 7. Relay Interface Option Board The relay interface board is available as an option for the Model 2002. Additionally, relays may be added to either the Digital option Board (RS -232 or RS-485) or to the Analog option Board (0 -10 Volts or 4-20mA ). In either case the relays operate independently of [...]

  • Page 29

    149-072011 Mod el 2002 Vacuum Gauge Page 29 of 38 8. 4-20 mA Interface Option Board The Relay option board in the Model 2002 operates off of the set points defined by the user and programmed into the Model 2002 microprocesso r. For more informa tion about configuring these set points refer to Section 3 of this manual. The 4-20 mA interface board is[...]

  • Page 30

    149-072011 Mod el 2002 Vacuum Gauge Page 30 of 38 8.2. Operation The 4-20 mA output option board provi des dual channe l current output linearly proportional to the HPM 2002’s pressure reading. The first channel corre spon ds to the higher pressure range (0-1024 Torr). The second channel corresponds to the lower pressure ra ng e (0-1000mTorr). Th[...]

  • Page 31

    149-072011 Mod el 2002 Vacuum Gauge Page 31 of 38 9. 0-10V Interface Option Board The 0-10 V interface board is available as an option for the Model 2002. This board provides dual voltage channels linearly proportional to the HPM 2002’s pressu re reading. Please note that use of the Model 2002 with this option requires a CPU with firmwar e versio[...]

  • Page 32

    149-072011 Mod el 2002 Vacuum Gauge Page 32 of 38 The 0-10V output option board, provides voltage outputs pr oportional to the HP M-2002 pressure re ading. The first channel corresponds to the higher -pressu re range (0-1024) Torr ). The second channel corrresponds to the lowe r pressure range (0 -1000mTorr). The equation below gives the output vol[...]

  • Page 33

    149-072011 Mod el 2002 Vacuum Gauge Page 33 of 38 10. T roubleshooting Guide Symptom: Power on - No display activity. Action: 1. Check for proper AC voltage at the o utlet. 2. Ensure that the AC power c ord connectors are firmly se ated in their sockets. (at the outlet and at the instrument.) 3. Check the fuse. a) Remove the power cord from the IEC[...]

  • Page 34

    149-072011 Mod el 2002 Vacuum Gauge Page 34 of 38 11. W ARRANTY 11.1. 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. This warranty does not apply to de fects or failures resulting from unauthorized modification, misuse or mi[...]

  • Page 35

    149-072011 Mod el 2002 Vacuum Gauge Page 35 of 38 12. Diagrams and Drawings[...]

  • Page 36

    149-072011 Mod el 2002 Vacuum Gauge Page 36 of 38[...]

  • Page 37

    149-072011 Mod el 2002 Vacuum Gauge Page 37 of 38 Model 2002 Outline Dimensions[...]

  • Page 38

    149-072011 Mod el 2002 Vacuum Gauge Page 38 of 38[...]