Introduction and Specifications 1

Introduction

1-1. Introduction

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.

Some features provided by the instrument are listed in Table 1-1.

1-2. Options and Accessories

The following items can be installed either at the factory or in the field:

∙Option 2620A-05K (IEEE-488 Interface Kit) consists of a printedcircuit assembly, connecting cable, and mounting hardware. Thisfield-installable kit gives the 2620A Hydra Data Acquisition UnitIEEE-488 interface capabilities. IEEE-488 computer interfacecommands are virtually identical to RS-232 interface commands. (The2625A and 2635A cannot be equipped with an IEEE-488 Interface.)

∙Accessory 2620A-100 (Connector Kit).

The instrument can be mounted in a standard 19-inch rack panel on either the right-hand or left-hand side using the Fluke M00-200-634 Rackmount Kit.

Accessories are listed in Table 1-2.

1-3. Operating Instructions

Full operating instructions are provided in the Hydra User Manual (2620A or 2625A) and in the Hydra Data Bucket User Manual (2635A). Refer to the User Manual as necessary during the maintenance and repair procedures presented in this Service Manual.

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Fluke 2625A, 2635A service manual Introduction, Options and Accessories, Operating Instructions
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2635A, 2625A specifications

The Fluke 2625A is a sophisticated data logger designed for a wide range of industrial and laboratory applications. This versatile instrument excels in capturing and monitoring temperature and voltage measurements with precision and reliability. One of its standout features is its ability to record data from various sensors, making it ideal for environments where comprehensive data acquisition is critical.

Equipped with a large LCD display, the Fluke 2625A provides clear and user-friendly access to real-time measurement data. Its graphical interface allows users to visualize trends and monitor readings easily, which significantly enhances usability. The device supports a variety of input types and can connect to thermocouples, RTDs, and other sensors, offering great flexibility for various measurement tasks.

The Fluke 2625A employs advanced measurement technologies that ensure accuracy in data logging. With a high sampling rate, it captures fast-changing signals while maintaining data integrity. The device features a built-in memory that allows for extensive logging, accommodating long-term monitoring tasks without requiring constant oversight. Users can set it to log data at specified intervals, offering customizable solutions for different monitoring needs.

Another significant characteristic of the Fluke 2625A is its robust communication capabilities. The device supports USB and RS-232 interfaces for easy connectivity with computers and other devices, making data transfer and analysis seamless. This feature is especially beneficial for users who need to compile or analyze large sets of data quickly.

Furthermore, the Fluke 2625A is designed with durability in mind. Its rugged construction makes it suitable for challenging environments, including those with high levels of vibration, dust, or moisture. This reliability ensures that the device can withstand the rigors of fieldwork while still delivering accurate measurements.

In summary, the Fluke 2625A is a powerful data logger that combines versatility, accuracy, and reliability. Its user-friendly interface, advanced measurement technologies, and robust design make it an essential tool for professionals in various industries, from manufacturing and HVAC to research and development. Whether monitoring temperature changes in a laboratory or assessing voltage levels in an industrial setting, the Fluke 2625A stands out as a trusted solution for effective data logging and analysis.
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