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U2802A_UG.book Page II Tuesday, January 8, 2008 10:24 AM Notices © Agilent Technologies, Inc. 2008 Warranty No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Agilent Technologies, Inc. as governed by United States and international copyright laws.
U2802A_UG.book Page III Tuesday, January 8, 2008 10:24 AM Safety Information The following general safety precautions must be observed during all phases of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Agilent Technologies, Inc. assumes no liability for the customer’s failure to comply with these requirements.
U2802A_UG.book Page IV Tuesday, January 8, 2008 10:24 AM Off (Supply) Equipment protected throughout by double insulation or reinforced insulation Caution, risk of electric shock Caution, hot surface Caution, risk of danger (See note.
U2802A_UG.book Page V Tuesday, January 8, 2008 10:24 AM Regulatory Markings The CE mark is a registered trademark of the European community. This CE mark shows that the product complies with all the relevant European legal directive. ICES/NMB-001 indicates that this ISM device complies with Canadian ICES-001. The CSA mark is a registered trademark of the Canadian Standards Association. A CSA mark with the indicators "C" and "US" means that the product is certified for both the U.S.
U2802A_UG.book Page VI Tuesday, January 8, 2008 10:24 AM General Safety Information WARN IN G CAU T ION VI • Do not use the device if it is damaged. Before you use the device, inspect the case. Look for cracks or missing plastic. Do not operate the device around explosive gas, vapor or dust. • Do not apply more than the rated voltage (as marked on the device) between terminals, or between terminal and external ground. • Always use the device with the cables provided.
U2802A_UG.book Page VII Tuesday, January 8, 2008 10:24 AM Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC This instrument complies with the WEEE Directive (2002/96/EC) marking requirement. This affixed product label indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE directive Annex 1, this instrument is classified as a “Monitoring and Control Instrument” product.
U2802A_UG.book Page VIII Tuesday, January 8, 2008 10:24 AM Environmental Conditions The table below shows the general environmental requirements for the product.
U2802A_UG.book Page IX Tuesday, January 8, 2008 10:24 AM In This Guide... 1 Getting Started This chapter introduces the new Agilent U2802A 31- channel thermocouple input device and provides quick start information. It also provides product outlook, installation configuration and troubleshooting guide. 2 Features and Functions This chapter contains details of the product features, applications, system overview and theory of operation.
U2802A_UG.book Page X Tuesday, January 8, 2008 10:24 AM DECLARATION OF CONFORMITY According to EN ISO/IEC 17050-1:2004 Generic example Manufacturer’s Name: Manufacturer’s Address: Agilent Technologies Microwave Products (M) Sdn.
U2802A_UG.book Page XI Tuesday, January 8, 2008 10:24 AM Product Regulations EMC Performance Criteria IEC 61326-1:2002 / EN 61326-1:1997+A1:1998+A2:2001+A3:2003 CISPR 11:1990 / EN 55011:1990 – Group 1 Class A IEC 61000-4-2:1995 / EN 61000-4-2:1995 (ESD 4kV CD, 8kV AD) IEC 61000-4-3:1995 / EN 61000-4-3:1996 (3V/m, 80% AM) IEC 61000-4-4:1995 / EN 61000-4-4:1995 (EFT 0.5kV line-line, 1kV line-earth) IEC 61000-4-5:1995 / EN 61000-4-5:1995 (Surge 0.
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U2802A_UG.book Page 1 Tuesday, January 8, 2008 10:24 AM Contents Notices II Safety Information III Environmental Conditions VIII In This Guide...
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U2802A_UG.book Page 4 Tuesday, January 8, 2008 10:24 AM List of Tables Table 4-1 U2802A measurement accuracy with U2355A or U2356A, at 23 °C ± 5 °C, with different number of averaging points. 51 Table 4-2 U2802A measurement accuracy with U2355A, at 0 to 18 °C and 28 to 45 °C, with different number of averaging points. 52 Table 4-3 U2802A measurement accuracy with U2356A, at 0 to 18 °C and 28 to 45 °C, with different number of averaging points.
U2802A_UG.book Page 1 Tuesday, January 8, 2008 10:24 AM Agilent U2802A 31-Channel Thermocouple Input User’s Guide 1 Getting Started Introduction to Agilent U2802A 31-Channel Thermocouple Input 2 Product Overview 3 Product Outlook 3 Product Dimensions 5 Standard Purchase Items Checklist 6 Installations and Configurations 7 A. Check Your System Requirements 9 B. Check Your Pre-Installed IO Libraries Suite 10 C. Install the Agilent IO Libraries Suite Version 14.2 or Higher 11 D.
U2802A_UG.book Page 2 Tuesday, January 8, 2008 10:24 AM 1 Getting Started Introduction to Agilent U2802A 31-Channel Thermocouple Input The Agilent U2802A 31- channel thermocouple input is a thermocouple input device that functions to convert low input voltage signal (< ±100 mV) from a thermocouple into an output voltage range suitable for data acquisition (DAQ) device (± 10 V).
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U2802A_UG.book Page 6 Tuesday, January 8, 2008 10:24 AM 1 Getting Started Standard Purchase Items Checklist Inspect and verify that you have all the following items upon standard purchase of U2802A 31- channel thermocouple input device. If there are missing items, contact the nearest Agilent Sales Office.
U2802A_UG.book Page 7 Tuesday, January 8, 2008 10:24 AM Getting Started 1 Installations and Configurations The U2802A is used in conjunction with the U2355A or U2356A DAQ. If you are using the U2300A Series with the Agilent Measurement Manager, follow the step- by- step instructions as shown in the following flowchart.
U2802A_UG.book Page 8 Tuesday, January 8, 2008 10:24 AM 1 Getting Started A. Check Your System Requirements B. Check Your Pre-Installed IO Libraries Suite i. If Agilent IO Libraries Suite version 14.1 or lower has been pre-installed (requires uninstalling of this version) ii. If Agilent IO Libraries Suite 14.2 has been pre-installed iii. If Agilent IO Libraries Suite is not installed C. Install the Agilent IO Libraries Suite Version 14.2 or Higher D. Install the DAQ Hardware Driver E.
U2802A_UG.book Page 9 Tuesday, January 8, 2008 10:24 AM Getting Started 1 A. Check Your System Requirements Before installing the Agilent Measurement Manager software and DAQ hardware driver, make sure your PC meets the following minimum system requirements for installation and data acquisition. Processor 1.
U2802A_UG.book Page 10 Tuesday, January 8, 2008 10:24 AM 1 Getting Started B. Check Your Pre-Installed IO Libraries Suite To check the version of your pre- installed IO Libraries Suite follow the instructions below. 1 Right- click IO Control icon on your taskbar notification area and the context menu will appear as shown below. Select About Agilent IO Control. 2 Agilent IO Control window will appear and the version of installed IO Libraries Suite will be displayed as shown below.
U2802A_UG.book Page 11 Tuesday, January 8, 2008 10:24 AM Getting Started 1 i. If Agilent IO Libraries Suite version 14.1 or lower has been pre-installed If you have Agilent IO Libraries Suite version 14.1 or lower installed on your PC, you are required to uninstall the IO Libraries Suite. 1 To perform uninstallation, go to Start > Control Panel > Add or Remove Programs. The Add or Remove Programs window will appear. Select Agilent IO Libraries Suite 14.1 or lower version.
U2802A_UG.book Page 12 Tuesday, January 8, 2008 10:24 AM 1 Getting Started 1 Disconnect any USB DAQ device that is connected to your PC and close all other applications on your PC. 2 Insert the Agilent Automation- Ready CD into your CD- ROM drive, and follow the instructions on your screen. 3 If the installation does not start automatically, go to Start > Run (on the Windows start menu) and type :\autorun\auto.exe where drive is your CD- ROM drive.
U2802A_UG.book Page 13 Tuesday, January 8, 2008 10:24 AM Getting Started 1 D. Install the DAQ Hardware Driver N O TE Refer to Agilent U2300A Series USB MultifunctionData Acquisition Devices User’s Guide for DAQ hardware driver installation procedure. E. Install the Agilent Measurement Manager N O TE Make sure Agilent Measurement Manager version 1.4 and above is installed before U2802A is used. 1 Verify that you have the hardware driver installed.
U2802A_UG.book Page 14 Tuesday, January 8, 2008 10:24 AM 1 Getting Started 5 If you do not have the Agilent T&M Toolkit 2.1 Runtime version and/or Microsoft .NET Framework version 1.1 and 2.0 installed, the InstallShield Wizard software pre- requisite will appear as shown below. 6 Click OK to begin installation of the listed missing software.
U2802A_UG.book Page 15 Tuesday, January 8, 2008 10:24 AM Getting Started 1 9 Read the License Agreement and select I accept the terms in the License Agreement to proceed. You may click Print to print a hardcopy of the Agilent License Terms for reference. Click Next to proceed. 10 Fill in the Customer Information form, as shown below, accordingly and click Next. 11 Click Next to install to the folder specified or click Change to install to a different folder.
U2802A_UG.book Page 16 Tuesday, January 8, 2008 10:24 AM 1 Getting Started 12 Click Install to begin the installation of Agilent Measurement Manager. 13 Click Finish when the installation has completed. 14 A shortcut to this software will be created on your desktop. N O TE 16 USING THE LICENSED MATERIALS INDICATES YOUR ACCEPTANCE OF THE LICENSE TERMS. IF YOU DO NOT AGREE TO ALL OF THESE TERMS, YOU MAY RETURN ANY UNOPENED LICENSED MATERIALS FOR A FULL REFUND.
U2802A_UG.book Page 17 Tuesday, January 8, 2008 10:24 AM Getting Started 1 F. Connect Your DAQ Device to the PC N O TE Refer to Agilent U2300A Series USB MultifunctionData Acquisition Devices User’s Guide for “Connect Your DAQ Device to PC” procedure. During DAQ connectivity, the bundled power supply splitter in U2802A is used to supply power for both U2802A and U2355/56A DAQ, replacing the power supply cable. G.
U2802A_UG.book Page 18 Tuesday, January 8, 2008 10:24 AM 1 Getting Started I. Launch Your Agilent Measurement Manager N O TE • • • The Agilent IO Control will launch automatically when you start your PC. Launching Agilent Measurement Manager without Agilent IO Control running will cause Agilent Measurement Manager to fail from detecting or establishing any connection with the USB DAQ device connected to your PC.
U2802A_UG.book Page 19 Tuesday, January 8, 2008 10:24 AM Getting Started 1 IVI-COM Drivers The Agilent IVI- COM drivers simplify instrument control when you are working in a COM- compatible environment. IVI- COM allows you to programmatically control your instrumentation and make measurements while providing a greater degree of instrument interchangeability and code reuse.
U2802A_UG.book Page 20 Tuesday, January 8, 2008 10:24 AM 1 Getting Started application will compile, link, and execute without error. The test results, however, may be quite different because different instruments measure and generate signals differently. For more information on class- compliant interfaces and capability groups, visit www.ivifoundation.org.
U2802A_UG.book Page 21 Tuesday, January 8, 2008 10:24 AM Getting Started 1 Programming Environments An IVI- COM driver works well in a variety of application development environments (ADEs) below: ✔ Agilent VEE ✔ Microsoft® Visual Basic® 6 ✔ Visual Studio C++ ✔ Visual Basic 7 ✔ C# ✔ National Instruments LabVIEW IVI-COM Driver Installation 1 Verify that your PC meets the minimum system requirements. (See ‘System Requirements’ on page 9.) 2 Close all other applications on your PC.
U2802A_UG.book Page 22 Tuesday, January 8, 2008 10:24 AM 1 Getting Started 7 Click IVI-COM to open the IVI- COM Driver Installation Menu. 8 Check on the U2300A Series and click Install and wait for the Installation Dialog to appear. 9 When the Installation Dialog appears, click Next to begin the IVI Driver installation. 10 Read the License Agreement(s). To accept the terms, click on the radio button labeled I accept the terms in the License Agreement then click Next to continue.
U2802A_UG.book Page 23 Tuesday, January 8, 2008 10:24 AM Getting Started 1 12 If you choose a Custom setup, the Select Features dialog box will appear. a Click on any feature in the list to see the feature’s description and space requirement. It is recommended that you install the sample programs if you plan to program with the IVI driver. However, you may omit this recommendation to save space. b Select the check box for each feature to be installed. Clear the check box to omit the feature selection.
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U2802A_UG.book Page 25 Tuesday, January 8, 2008 10:24 AM Agilent U2802A 31-Channel Thermocouple Input User’s Guide 2 Features and Functions Features 26 Applications 27 System Overview 28 Theory of Operation 29 Functionality of the System 29 Functional Block Diagram 30 This chapter contains details of the product features, applications, system overview and theory of operation.
U2802A_UG.book Page 26 Tuesday, January 8, 2008 10:24 AM 2 Features and Functions Features The U2802A Thermocouple Input conditioning device is complete with the following features: ✔ Up to 31 differential input mode, or 31- single ended inputs in voltage input mode. Each of the 31 channels can be configured as either thermocouple or voltage input mode independently. ✔ ×97.673 gain setting for thermocouple input mode. ✔ Built- in thermistor for cold junction compensation (CJC).
U2802A_UG.book Page 27 Tuesday, January 8, 2008 10:24 AM Features and Functions 2 Applications The U2802A Thermocouple Input conditioning device is designed for robust and demanding industrial applications.
U2802A_UG.book Page 28 Tuesday, January 8, 2008 10:24 AM 2 Features and Functions System Overview Figure 2-1 System overview of U2802A with DAQ The U2802A is essentially an amplifier module with a built- in temperature sensor (thermistor). In thermocouple mode, the U2802A input channel is used to amplify a differential voltage signal from a thermocouple (or any low voltage signal source in the range of ±100 mV) by 100 times.
U2802A_UG.book Page 29 Tuesday, January 8, 2008 10:24 AM Features and Functions 2 Theory of Operation Functionality of the System Figure 2-2 System functionality block diagram for U2802A 1 Thermocouple voltage signals are detected at the U2802A thermocouple inputs. 2 Signal is amplified with a gain of 97.673 by the U2802A. 3 The U2355A or U2356A DAQ converts the analog voltage signals to digital voltage readings.
U2802A_UG.book Page 30 Tuesday, January 8, 2008 10:24 AM 2 Features and Functions Functional Block Diagram The block diagram below in Figure 2- 3 illustrates the key functional components of the U2802A.
U2802A_UG.book Page 31 Tuesday, January 8, 2008 10:24 AM Features and Functions 2 The major functional blocks of the U2802A module are: • Analog input channel circuitry • Cold junction sensor • Digital control logic • EEPROM Analog input channel circuitry The analog circuitry for each channel consists of an instrumentation amplifier with a fixed gain of 97.673, a 4 Hz RC low- pass filter, and an output buffer.
U2802A_UG.book Page 32 Tuesday, January 8, 2008 10:24 AM 2 Features and Functions Bypass mode: In bypass mode, the TCn+ input is routed directly to the corresponding AI channel on Rear Connector 1. The single- ended signals tied to TCn+ should be referenced to a GND pin, and not to the TCn– input, as it is not directly connected to GND. The signal connection will depend on the type of source used.
U2802A_UG.book Page 33 Tuesday, January 8, 2008 10:24 AM Features and Functions Figure 2-6 2 Ground-referenced and differential signal sources configuration in U2802A Zero mode: In zero mode, the positive and negative inputs of the instrumentation amplifier are shorted together. The output of the instrumentation amplifier is driven out to the corresponding AI channel. The voltage measured in this mode corresponds to the offset voltage of the channel.
U2802A_UG.book Page 34 Tuesday, January 8, 2008 10:24 AM 2 Features and Functions For bypass mode channels that are connected to valid voltage sources, the 10 MΩ pull- up resistor will cause additional current to flow through the voltage source. However, this additional current measurement is small and negligible for low impedance voltage sources. For thermocouple mode channels connected to valid thermocouples, the presence of the pull- up resistor introduces approximately 0.
U2802A_UG.book Page 35 Tuesday, January 8, 2008 10:24 AM Features and Functions 2 Open Thermocouple Detection The U2802A provides a built- in 10 MΩ resistor on each TC+ terminal, which is pulled up to the internal +15 V power supply rail. This resistor can be enabled or disabled via the digital I/O pins on Rear Connector 2.
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U2802A_UG.book Page 37 Tuesday, January 8, 2008 10:24 AM Agilent U2802A 31-Channel Thermocouple Input User’s Guide 3 Pin Configurations and Assignments Pin Configurations 38 Pin Assignments 38 Pin Description 39 Connector Pinout 44 This chapter described the Agilent U2802A 31- channel thermocouple input device pin configurations and connector pinout for user’s reference.
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U2802A_UG.book Page 39 Tuesday, January 8, 2008 10:24 AM Pin Configurations and Assignments 3 Pin Description Connector J71 Pin Pin name Description 1 TC1+ 2 TC1– In thermocouple mode, TCx+ and TCx– are the thermocouple differential input. In voltage mode, single ended input at TCx+ and GND. TCx– is not connected.
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U2802A_UG.book Page 47 Tuesday, January 8, 2008 10:24 AM Agilent U2802A 31-Channel Thermocouple Input User’s Guide 4 Product Specifications General Specifications 48 Product Characteristics 49 System Accuracy Specifications 51 Calculating System Accuracy 54 System Typical Performance 57 Making Accurate Temperature Measurements 59 This chapter specifies the environmental conditions, characteristics, and specifications of the Agilent U2802A 31- channel thermocouple input device.
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U2802A_UG.book Page 50 Tuesday, January 8, 2008 10:24 AM 4 Product Specifications Overvoltage protectioni TC Modeii • Common mode: ±17 V (TC+ and TC– with respect to GND) • Differential mode: ±7 V (Differential voltage between TC+ and TC–) Bypass mode • ±20 V (TC+ input with respect to GND) Power Off Mode • ±11 V (TC+, TC– input with respect to GND) Input impedance > 1 GΩ Input bias current ±2.5 nA max Input offset current ±1.
U2802A_UG.book Page 51 Tuesday, January 8, 2008 10:24 AM Product Specifications 4 System Accuracy Specifications The Agilent U2802A thermocouple input measurement accuracy with the U2355A and U2356A is as shown in Table 4- 1, Table 4- 2, and Table 4- 3. N O TE • Assume a ±1 °C error in the CJ measurement due to sensor error and temperature gradient error in the accuracy numbers in Table 4-1, Table 4-2, and Table 4-3 below.
U2802A_UG.book Page 52 Tuesday, January 8, 2008 10:24 AM 4 Product Specifications Thermocouple Measurements Accuracy (U2355A @ 0 °C to 18 °C and 28 °C to 45 °C) T/C Type B E J K N R S T ITS-90 Temperature Range (°C) Optimum Measurement Range(°C) Without averaging 50 points averaging 500 points averaging (± °C) (± °C) (± °C) Low High Low High 0 1820 1100 1820 3.4 2.4 2.2 400 1100 7.5 3.6 2.2 –270 –210 –270 –270 –50 –50 –270 1000 1200 1372 1300 1768 1768 400 –150 1000 2.7 2.
U2802A_UG.book Page 53 Tuesday, January 8, 2008 10:24 AM Product Specifications 4 Thermocouple Measurements Accuracy (U2356A @ 0 °C to 18 °C and 28 °C to 45 °C) T/C Type B E J K N R S T ITS-90 Temperature Range (°C) Optimum Measurement Range(°C) 50 points averaging 500 points averaging (± °C) (± °C) (± °C) Low High Low 0 1820 1100 1820 6.1 3.1 2.4 400 1100 14.4 6.3 2.7 –150 1000 3.0 2.6 2.6 –200 –150 4.2 3.7 3.
U2802A_UG.book Page 54 Tuesday, January 8, 2008 10:24 AM 4 Product Specifications Calculating System Accuracy The overall measurement system comprises of three major components: 1 DAQ (U2355A or U2356A) 2 Signal Conditioner (U2802A), which includes CJ Sensor error 3 Sensor (Thermocouples) Errors introduced by each of the above components has to be accounted for when calculating the total system accuracy.
U2802A_UG.book Page 55 Tuesday, January 8, 2008 10:24 AM Product Specifications 4 With zeroing, the offset errors from the DAQ and the U2802A can be removed, and replaced with the zeroing error. Based on the ITS- 90 Thermocouple table, a J- type thermocouple will output 33.102 mV at 600 °C, and changes at a rate of approximately 59 µV/°C. This corresponds to (33.102 mV × 97.673) or 3.2332 V at the input of the DAQ. Hence, EDAQ, ESIG_COND, and EZEROING are calculated as follows: • EDAQ = 0.02% × 33.
U2802A_UG.book Page 56 Tuesday, January 8, 2008 10:24 AM 4 Product Specifications Therefore, ETHERMOCOUPLE = 0.75% × 600 °C = 4.5 °C Using the above individual component errors, the total measurement system accuracy is calculated as below. System accuracy without thermocouple sensor error: ETOTAL = SQRT(EDAQ2 + ESIG_COND2 + EZEROING2 + ECJC2) = 0.95 °C System accuracy with thermocouple sensor error: ETOTAL = SQRT(EDAQ2 + ESIG_COND2 + EZEROING2 + ECJC2 + ETHERMOCOUPLE2) = 4.
U2802A_UG.book Page 57 Tuesday, January 8, 2008 10:24 AM Product Specifications 4 System Typical Performance Thermoelectric Characteristics The thermoelectric characteristics for various thermocouple types is shown in Figure 2- 1.
U2802A_UG.book Page 58 Tuesday, January 8, 2008 10:24 AM 4 Product Specifications Typical Error vs. Measurement Performance The U2802A measurement error with U2355A or U2356A at 23 °C ± 5 °C is shown in Figure 2- 2. Figure 4-2 N O TE 58 U2802A measurement accuracy plot for various thermocouples type Assume a ±1 °C error in the CJ measurement due to sensor error and temperature gradient error in the accuracy numbers in Figure 4-2.
U2802A_UG.book Page 59 Tuesday, January 8, 2008 10:24 AM Product Specifications 4 Making Accurate Temperature Measurements Thermocouple measurement accuracy is very sensitive to cold junction sensor errors and temperature gradients across the terminals. Keep the module away from any heat sources and drafts to minimize any variation between channels. The channels located closest to the center near the reference thermistor will have the best accuracy.
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U2802A_UG.book Page 61 Tuesday, January 8, 2008 10:24 AM Agilent U2802A 31-Channel Thermocouple Input User’s Guide 5 Calibration Calibration 62 Calibration Information 62 Zeroing Function 62 Restore Factory Calibration 63 This chapter contains the calibration information and factory restore calibration procedure for the Agilent U2802A 31- channel thermocouple input device.
U2802A_UG.book Page 62 Tuesday, January 8, 2008 10:24 AM 5 Calibration Calibration Calibration Information The Agilent U2802A is factory calibrated and the calibration constants are stored in the EEPROM. During initial setup, the calibration constants are read from the EEPROM before any measurements are taken. Zeroing Function The Agilent U2802A thermocouple input device operating in thermocouple mode can be set to zero mode, where the differential inputs of each channel are shorted together.
U2802A_UG.book Page 63 Tuesday, January 8, 2008 10:24 AM Calibration 5 Restore Factory Calibration The Restore Factory Calibration function in the Agilent U2802A is used to restore calibration data from user’s settings to factory original settings. To perform factory restore calibration, follow the step- by- step instructions shown below: 1 Click Restore Factory Calibration in the thermocouple form. 2 A dialog box will appear as shown below. 3 Click OK to start the factory restore calibration process.
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U2802A_UG.book Page 57 Tuesday, January 8, 2008 10:24 AM www.agilent.
