|Fluke HYDRA 2625A Test Set|
Hydra measures analog inputs of dc and ac volts, thermocouple and RTD temperatures, resistance, and frequency. It features 21 measurement input channels. In addition, it contains eight digital input/output lines, one totalizing input, one external scan trigger input, and four alarm output lines. Hydra is fully portable and can be ac or dc powered. An RS-232 computer Interface is standard. An optional IEEE-488 computer Interface is available for the Hydra Data Acquisition Unit (2620A) only. The Hydra Data Logger (2625A) adds substantial measurement memory capabilities. The RS-232 computer Interface is standard, but IEEE-488 capability is not available for the Hydra Data Logger. The Hydra Data Bucket (2635A) adds more flexible storage for instrument setups and measurement data by adding a PCMCIA memory card and Interface. The amount of storage can be easily changed by selecting a memory card of the appropriate size for the job. The Hydra instruments share many features and functions. The term "instrument" is used to refer to all three instruments. The model number (2620A, 2625A, or 2635A) is used when discussing features unique to one instrument. The instrument is designed for bench-top, field service, and system applications. A dual vacuum-fluorescent display uses combinations of alphanumeric characters and descriptive annunciators to provide prompting and measurement information during setup and operation modes. Channel Scanning Can be continuous scanning, scanning at an interval time, single scans, or triggered (internal or external) scans. · Channel Monitoring Make measurements on a single channel and view these measurements on the display. · Channel Scanning and Monitoring View measurements made for the monitor channel while scanning of all active channels continues. · Multi-Function Display Left (numeric) display shows measurement readings; also used when setting numeric parameters. Right (alphanumeric) display used for numeric entries, channel number selection and display, status information, and operator prompts. · Front-Panel Operation Almost all operations can be readily controlled with the buttons on the front panel. · Measurement Input Function and Range Volts dc (VDC), volts ac (VAC), frequency (Hz), and resistance (Ω) inputs can be specified in a fixed measurement range. Autoranging, which allows the instrument to use the measurement range providing the optimum resolution, can also be selected. · Temperature Measurement Thermocouple types J, K, E, T, N, R, S, B, and Hoskins Engineering Co. type C are supported.Also, DIN/IEC 751 (Pt 385) Platinum RTDs are supported. · Totalize Events on the Totalizing Input · Alarms Limits and Digital Output Alarm Indication · 4-Terminal Resistance Measurements (Ch. 1 .. 10) · RS-232 Computer Interface Operation · Measurement Rate Selection · Nonvolatile Memory Storage of minimum, maximum, and most recent measurements for all scanned channels. Storage of Computer Interface setup, channel configurations, and calibration values. · Features unique to the 2625A Data Logger. Storage of measurement data: storage for 2047 scans of up to 21 channels, representing up to 42,987 readings. · Features unique to the 2635A Data Bucket. Internal storage of measurement data for 100 scans of up to 21 channels, representing up to 2,100 readings. Memory card storage of instrument setup configurations so that instrument may be quickly set up to do different tasks. Memory card storage of measurement data for up to 4,800 scans of 10 channels on a 256K-byte card or up to 19,800 scans of 10 channels on a 1M-byte memory card. Enhanced RS-232 Interface with higher baud rates and hardware flow control using the Clear to Send modem control signal.
These manuals are available for the above equipment:
|Fluke -- HYDRA 2625A -- Service Manual|
|Manual Type||Service Manual|
|Size||9.26 Mbytes (9712425 Bytes)|
|Quality||Scanned document, all readable.|
|Upload date||31 January 2016|
|Downloads||693 since 31 January 2016|
This manual focuses on performance tests, calibration procedures, and component-level repair of each of the instruments. To that end, manual sections are often interdependent; effective troubleshooting may require not only reference to the troubleshooting procedures in Section 5, but also some understanding of the detailed Theory of Operation in Section 2 and some tracing of circuit operation in the Schematic Diagrams presented in Section 8. Often, scanning the table of contents will yield an appropriate place to start using the manual. A comprehensive table of contents is presented at the front of the manual; local tables of contents are also presented at the beginning of each chapter for ease of reference. If you know the topic name, the index at the end of the manual is probably a good place to start. The following chapter descriptions serve to introduce the manual: Chapter 1. Introduction and Specifications Introduces the instrument, describing its features, options, and Accessories. This chapter also discusses use of the Service Manual and the various conventions used in describing the circuitry. Finally, a complete set of specifications is presented. Chapter 2. Theory of Operation (2620A and 2625A) This chapter first categorizes these instrument's circuitry into functional blocks, with a description of each block’s role in overall operation. A detailed circuit description is then given for each block. These descriptions explore operation to the component level and fully support troubleshooting procedures defined in Chapter 5. Chapter 2A. Theory of Operation (2635A) This chapter first categorizes the instrument’s circuitry into functional blocks, with a description of each block’s role in overall operation. A detailed circuit description is then given for each block. These descriptions explore operation to the component level and fully support troubleshooting procedures defined in Chapter 5A. Chapter 3. General Maintenance Provides maintenance information covering handling, cleaning, and fuse replacement. Access and reassembly procedures are also explained in this chapter. Chapter 4. Performance Testing and Calibration This chapter provides performance verification procedures, which relate to the specifications presented in Chapter 1. To maintain these specifications, a full calibration procedure is also presented. Chapter 5. Diagnostic Testing and Troubleshooting (2620A and 2625A) The troubleshooting procedures presented in this chapter rely closely on both the Theory of Operation presented in Chapter 2, the Schematic Diagrams shown in Chapter 8, and the access information provided in Chapter 3. Chapter 5A. Diagnostic Testing and Troubleshooting (2635A) The troubleshooting procedures presented in this chapter rely closely on both the Theory of Operation presented in Chapter 2A, the Schematic Diagrams shown in Chapter 8, and the access information provided in Chapter 3. Chapter 6. List of Replaceable Parts Includes parts lists for all standard assemblies. Information on how and where to order parts is also provided. Chapter 7. IEEE-488 Option (2620A only) This chapter describes the IEEE-488 option. Included are specifications, theory of operation, maintenance, and a list of replaceable parts. Schematic diagrams for this option are included at the end of the overall Service Manual (Chapter 8). Chapter 8. Schematic Diagrams Includes schematic diagrams for all standard and optional assemblies. A list of mnemonic definitions is also included to aid in identifying signal name abbreviations. Chapter 9. Hydra Starter Calibration Software This chapter provides an extened tutorial that demostrates how to perform a series of operations. These operations introduce you to the menu structure of the Starter with cal software, explain what the menu items do, and teach you how to use them.
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