5725A

Instruction Manual

4-16. Power Supply Assembly (A4)

The Power Supply assembly (A4) provides regulated system supplies for all 5725A assemblies except as noted below, as well as unregulated fan supply and high voltage supplies for the High Voltage Amplifier. The assembly also includes microprocessor- controlled switching and an independent current-limit circuit.

Note

Other power supplies are contained on the Current Amplifier assembly (A2). The A2 assembly includes a high-current supply and a local ±20V supply.

The Power Supply assembly has four sections: high voltage supply, switching, current limit, and system supply section. Each section is first briefly described, then described in detail.

High Voltage Supply Section

The high voltage supply section consists of a simple unregulated power supply with the additional capability of being run at ±400V dc for normal instrument operation, or at ±50V dc for troubleshooting.

Switching Section

The switching section behaves like an electronic DPST switch, which by command of the microprocessor or the current-limit section, shuts down the high voltage supplies. Microprocessor control alone can turn on the high voltage supplies in normal operation. At the board level, manual control of the switch is possible to enable stand-alone turn on of the Power Supply assembly (A4) and the High Voltage Amplifier assembly (A3).

Current-Limit Section

The current-limit section shuts down the high voltage supply in a latching mode if excessive current is drawn by the High Voltage Amplifier or if the ±15V or +5V supplies fail. This section of the Power Supply assembly consists of a pair of shunts, a pair of comparators, and a system supply monitor.

System Supply Section

The system supply section contains various regulated power supplies, and is comprised of five linear regulators. In addition, the system supply section contains an unregulated supply for the fan.

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Fluke 5725A instruction manual Power Supply Assembly A4

5725A specifications

The Fluke 5725A is a high-performance, multifunctional temperature calibration source designed to meet the demanding requirements of laboratory and industrial environments. Renowned for its accuracy, reliability, and versatility, the 5725A serves as a powerful tool for engineers and technicians engaged in temperature calibration processes.

At the core of the 5725A is its advanced measurement technology, which allows for precision temperature calibrations across a wide range. With an operating temperature range from -200°C to 660°C, it caters to various applications, making it suitable for calibrating thermocouples, resistance temperature detectors (RTDs), and other temperature measurement devices.

One of the standout features of the Fluke 5725A is its outstanding accuracy, boasting a specified uncertainty of just ±0.15°C. This level of precision ensures that users can maintain compliance with regulatory standards and regulatory requirements in fields such as aerospace, pharmaceuticals, and manufacturing.

The Fluke 5725A is equipped with dual-channel capabilities, allowing users to calibrate two devices simultaneously. This enhances productivity by minimizing downtime and optimizing workflow efficiency. The intuitive touchscreen interface simplifies operations, enabling users to view measurements, set up test parameters, and access historical data with ease.

Versatile connectivity options such as USB and Ethernet enable seamless integration into existing systems and allow for data transfer, remote control, and configuration. This feature empowers technicians to conduct calibrations efficiently, whether on-site or remotely.

The robust design of the Fluke 5725A ensures its durability in demanding environments. Built with high-quality materials, it is resistant to shocks and vibrations, making it suitable for use in manufacturing plants and laboratories where equipment may be subjected to harsh conditions.

Another notable characteristic of the 5725A is its ability to generate stable temperature outputs with minimal drift, contributing to consistency in calibration results. Its built-in self-test functionality helps ensure that the unit remains in peak operating condition, giving users confidence in their calibration processes.

In summary, the Fluke 5725A is a top-tier temperature calibration source that excels in accuracy, reliability, and user-friendliness. Whether in laboratory settings or industrial applications, its advanced technologies and features make it an essential tool for professionals tasked with maintaining precision in temperature measurements.