5725A

Instruction Manual

Accessing the High Voltage Output Transistors

6-13.

Warning

During normal operation, the high voltage heat sinks are at lethal voltage. To avoid electrical shock, do not proceed with the following access procedure until you have completed the initial access procedure, which removes line power and checks for high voltage on the power supply.

To access the high voltage output transistors (attached to four separate, large heat sinks in the center of the instrument), proceed as follows:

1.Perform the Initial Access Procedure.

2.Disconnect the heat sinks from the High Voltage Amplifier assembly by unplugging connectors J661, J662, J663, J664. Disconnect the temperature monitor by unplugging connector J603.

3.Remove the four screws that retain the high voltage heat sink assembly at the bottom rails.

4.Lift out the heat sink assembly, being careful to keep the cables clear of obstructions during removal.

5.Each of the four heat sinks is held in place by two screws, one at the top rail and one at the bottom rail. Labels on each heat sink identify it as P1, P2, N1, or N2. To remove a heat sink, remove its two retaining screws, and slide it out of the assembly.

Accessing the Interconnect Assembly (A1)

6-14.

Warning

To avoid electrical shock, do not proceed with the following access procedure until you have completed the initial access procedure, which removes line power and checks for high voltage on the power supply.

The Interconnect assembly is a vertical board oriented front-to-rear, and is accessible for test probing by placing any other assembly into the service position. To completely remove the Interconnect assembly, as would be required to replace a relay, proceed as follows:

1.Perform the Initial Access Procedure.

2.Completely remove the High Voltage Amplifier (A3) and the Current Amplifier (A2) assemblies by first placing each in the service position, then disconnecting all cables attached to each of them.

3.Turn over the 5725A so that the bottom is facing up.

4.Remove the bottom cover by removing the six screws on the bottom surface.

5.Completely remove the Power Supply (A4) and the High Voltage Sense assemblies (A6) by first placing each in the service position, then disconnecting all cables attached to each of them.

6-14

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Fluke 5725A instruction manual Accessing the High Voltage Output Transistors, Accessing the Interconnect Assembly A1
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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.
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