Teledyne 2002 - Manuals

Model 2002 Vacuum Gauge Page 5 of 37 board is also available. The Model 2002 instrument accepts an external TTL level "Remote Zero" to zero the instrument when another instrument (e.g. an ion gauge) indicates that the pressure is less than 1x10-5 Torr. The standard analog output is linear pe...

Model 2002 Vacuum Gauge Page 6 of 37 2. Installation This section is designed to assist in getting a new pressure gauge into operation as quickly and easily as possible. Please read the following instructions thoroughly before installing the instrument. 2.1. Receiving Inspection Carefully unpack the...

Model 2002 Vacuum Gauge Page 7 of 37 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 decreasing linearly to 50% relative humidity at 400C • Installation ...

Model 2002 Vacuum Gauge Page 8 of 37 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 ...

Model 2002 Vacuum Gauge Page 9 of 37 Scientific Notation The Model 2002 measures pressure that spans more 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...

Model 2002 Vacuum Gauge Page 12 of 37 3. Place the instrument in the CAL mode, then simultaneously press the UP and DOWN switches to bypass the interlock. The CAL light will start to flash indicating that the calibration mode has been activated. 4. Press the ZERO switch once if below 6x10-5 Torr oth...

Model 2002 Vacuum Gauge Page 13 of 37 light will now flash. Use the UP and DOWN switches to individually select the desired code. Return the Model 2002 to the RUN mode. Note: Factory calibration is performed using nitrogen only. Displayed pressure measurements using other gases are based on establis...

Model 2002 Vacuum Gauge Page 14 of 37 4. Rear Panel Description A schematic of the rear panel of the Model 2002 control unit is shown in Figure 4.2 ( Rear Panel Figure). The transducer is connected to the control unit via an female 9-pin “D” connector on the rear panel. An I/O cable can be connected...

Model 2002 Vacuum Gauge Page 15 of 37 If the analog output voltage is being used in a data acquisition system, the following formulas can be used to calculate pressure. Therefore, Note that the INT function simply returns to the first digit in a number. Examples: INT (2.56) = 2 INT (9.87) = 9 ------...

5. Theory of Operation The Model 2002 transducer is comprised of two very different sensors which provide a span of measurement extending from 1000 Torr down to less than 1x10-4 Torr. The piezoresistive device is a direct force sensor which provides pressure indication from 1000 Torr down to less th...

Model 2002 Vacuum Gauge Page 18 of 37 To insure temperature invariance, Therefore This requires for any change in sensitivity to be countered by an equal but opposite change in applied voltage. The temperature compensation is a network of temperature dependent resistive components and fixed temperat...

Model 2002 Vacuum Gauge Page 19 of 37 5.2. Pirani Sensor Figure 5.3a shows a thin film Pt resistive element on a one micron thick Si 3 N 4 continuous membrane surrounded by a thin film Pt reference resistor on a Si substrate. The membrane is heated to a constant 8 0 C above ambient temperature that ...

Model 2002 Vacuum Gauge Page 20 of 37 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 leaves only the rate of heat transmission through the gas (E g ). In the viscous flow regime, the Eg l...

Model 2002 Vacuum Gauge Page 21 of 37 Ta = ambient temperature P = pressure Ag = surface area of the heated portion of the membrane For nitrogen at a pressure of 760 Torr and a temperature of 20°C the mean free path (l) is less than 1 x 10-7 meters and is inversely proportional to pressure. Since th...

Model 2002 Vacuum Gauge Page 22 of 37 6. Communications Option Board Both RS-232 and RS-485 communication interface boards are available as an option for the Model 2002. The communication option boards allow data to be output to a host computer with the appropriate interface. Connection to the RS-23...

Model 2002 Vacuum Gauge Page 23 of 37 6.1.1. Interface Connector Pin Assignments for RS-485 (Full duplex-4 wire)(Jumper position 2-3). 6.1.2. For RS-485 (Half Duplex – 2 wire) (Jumper position 1-2). 6.2. Interface Connector Pin Assignments for RS-232 Note: an alternate method of connecting to a 2 wi...

Model 2002 Vacuum Gauge Page 25 of 37 Notes: The setpoints may also be entered as a decimal number, e.g. [H=760.99<CR>] will be same as entering [H=7.6099E+2<CR>] . When inputting setpoint data, it should be entered in the same Units of Pressure as the presently selected Units of Measure...

Model 2002 Vacuum Gauge Page 26 of 37 Reset / Restore Commands Command Description Format Notes: Escape <Esc> .......................................................................Reset Command Buffer .......................................................................................(Igno...

Model 2002 Vacuum Gauge Page 27 of 37 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 t...

Model 2002 Vacuum Gauge Page 28 of 37 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 microprocessor. For more information about configuring these set points refer to Section 3 of this ma...

Model 2002 Vacuum Gauge Page 29 of 37 8.2. Operation The 4-20 mA output option board provides dual channel current output linearly proportional to the HPM 2002’s pressure reading. The first channel corresponds to the higher pressure range (0-1024 Torr). The second channel corresponds to the lower pr...

Model 2002 Vacuum Gauge Page 30 of 37 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 pressure reading. Please note that use of the Model 2002 with this option r...

Model 2002 Vacuum Gauge Page 32 of 37 10. Troubleshooting Guide Symptom: Power on - No display activity. Action: 1. Check for proper AC voltage at the outlet. 2. Ensure that the AC power cord connectors are firmly seated in their sockets. (at the outlet and at the instrument.) 3. Check the fuse. a) ...

Model 2002 Vacuum Gauge Page 33 of 37 11. WARRANTY 11.1. 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 unauth...

Model 2002 Vacuum Gauge Page 34 of 37 12. Diagrams and Drawings