Maintenance 6

Access Procedures

6-12. Accessing the High Voltage Sense Assembly (A6)

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. Line voltage comes directly to this assembly.

The High Voltage Sense assembly lays flat on the bottom of the instrument, toward the rear. Proceed as follows to access the High Voltage Sense assembly:

1.Perform the Initial Access Procedure.

2.Follow the Current Amplifier Assembly (A2) access procedure to gain access to the connectors on the High Voltage Sense Assembly (A6). Remove the connectors and secure the Current Amplifier Assembly before proceeding.

3.Return the High Voltage Amplifier assembly (and the Current Amplifier assembly if it has been accessed) to the normal position, and reinstall the assembly retaining screws.

Note

When reinstalling assemblies, lower them in place squarely to make sure their connectors seat correctly in the Interconnect assembly connectors.

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

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

6.Remove the two jack screws from the 5700A subminiature D-connector.

7.Remove the five retaining screws on the High Voltage Sense assembly. Lift the High Voltage Sense assembly by pulling on the plastic wire-tie loops, and place the assembly in the service position.

Caution

When reinstalling the assembly, refer to Figure 6-6 and make sure cable harnesses are dressed as shown, to avoid shorting wires to the bridge rectifier heat sink or chassis.

6-13

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Fluke 5725A instruction manual Accessing the High Voltage Sense Assembly A6
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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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