Hewlett Packard 3478A Digital Multimeter
Hersteller:
Modell:
3478A
Datum:
1981
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Information

Your new 3478A is a fully programmable HP-IB* digital multimeter. In an automatic test or on the bench, the 3478A offers 3 1/2 to 5 1/2 digit resolution for measuring dc volts, true RMS ac volts, 2- and 4- wire ohms, and dc and RMS ac current. The 3478A offers dc voltage performance from 100 nanovolt sensitivity up to 300 volts (full scale), true RMS capability up to 300 kHz, and resistance measurements from 100µΩ sensitivity to 30MΩ (full scale). Its dc and true RMS ac current measuring capability is from 1µA sensitivity up to 3A. The fast autorange capability of the 3478A allows you to make measurements over a wide dynamic range without sacrificing throughput rates. By selecting the number of digits displayed and using the autozero feature, the 3478A allows you flexibility in measurement speed and accuracy. Up to 71 readings per second can be made with the 3478A in the 3 1/2 digit mode. The 3478A has a fast trigger mode which lets you bypass the built-in settling time delay to make fast true RMS ac measurements in systems applications.

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Serviceanleitung
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03478-90008
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Serials 2619A37795 and above 1-2. The information in this manual is for the Installation, Operation, Performance, Calibration, and Service of the 3478A Digital multimeter. The manual is designed for the use of Service Trained Personnel. Other users should refer to the Operators Manual. This manual is separated into the following sections. 1-3. Section I, General Information 1-4. A short description of the manual and introduction to the 3478A is in Section I. The section also lists instrument options, specifications, and Accessories. 1-5. Section II, Installation Procedures 1-6. This section explains how the 3478A is prepared for use and includes power requirements, line voltage selection, etc. The section also explains how to connect the multimeter for remote operation. 1-7. Section III, Operation 1-8. The condensed operating instructions of the 3478A for the use of Service Trained Personnel, is in this section. For more complete instructions, refer to the Operators Manual. 1-9. Section IV, Performance Test and Calibration 1-10. The 3478A’s Performance Test and Calibration Procedures are in Section IV. The Required Equipment Table and an abbreviated specification table are also included. 1-11. Section V, Replaceable Parts 1-12. Section V lists the replaceable parts of the 3478A, It also includes pictures and illustrations of chassis and mechanical parts. 1-13. Section VI, Backdating 1-14. This section has information which adapts this manual to 3478A’s with serial numbers below the ones shown on the title page. 1-15. Section VII, Service 1-16. The 3478A’s Troubleshooting Procedures, Theory Of Operation, and Schematics are in Section VII. The troubleshooting information is in the form of Service Groups which are symptoms oriented (i.e., what is the failure). The complete theory of operation is in Service Group F and the Schematics are in Service Group G (last group). 1-17. Appendix A 1-18. The appendix has a condensed description of the HP-IB (Hewlett-Packard Interface Bus).

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Serviceanleitung
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english
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Datum:
1984 01 01
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Information

1-1. INTRODUCTION 1-2. The information in this manual is for the Installation, Operation, Performance, Calibration, and Service of the 3478A Digital multimeter. The manual is designed for the use of Service Trained Personnel. Other users should refer to the Operators Manual. This manual is separated into the following sections. 1-3. Section I, General Information 1-4. A short description of the manual and introduction to the 3478A is in Section I. The section also lists instrument options, specifications, and Accessories. 1-5. Section II, Installation Procedures 1-6. This section explains how the 3478A is prepared for use and includes power requirements, line voltage selection, etc. The section also explains how to connect the multimeter for remote operation. 1-7. Section III, Operation 1-8. The condensed operating instructions of the 3478A for the use of Service Trained Personnel, is in this section. For more complete instructions, refer to the Operators Manual. 1-9. Section IV, Performance Test and Calibration 1-10. The 3478A’s Performance Test and Calibration Procedures are in Section IV. The Required Equipment Table and an abbreviated specification table are also included. 1-11. Section V, Replaceable Parts 1-12. Section V lists the replaceable parts of the 3478A, It also includes pictures and illustrations of chassis and mechanical parts. 1-13. Section VI, Backdating 1-14. This section has information which adapts this manual to 3478A’s with serial numbers below the ones shown on the title page. 1-15. Section VII, Service 1-16. The 3478A’s Troubleshooting Procedures, Theory Of Operation, and Schematics are in Section VII. The troubleshooting information is in the form of Service Groups which are symptoms oriented (i.e., what is the failure). The complete theory of operation is in Service Group F and the Schematics are in Service Group G (last group). 1-17. Appendix A 1-18. The appendix has a condensed description of the HP-IB (Hewlett-Packard Interface Bus).

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