Maintenance 6

Access Procedures

Warning

Follow the instructions under "Initial Access Procedure" to make sure high voltage has been bled off before you touch anything inside the 5725A.

If you work on a 5725A with the power cord attached, and/or you are not certain the high voltage has not bled off, do not wear a grounded wrist strap. Wearing a strap increases risk of dangerous electrical shock.

Use extreme caution when you are working inside the 5725A with the power connected. Use only non-conductive tools, and keep one hand behind your back to avoid making a circuit through your body.

The voltage output transistor heat sinks are at lethal voltage potential in ac V standby and ac V operate modes during normal operation, and possibly in any other mode after a failure. The heat sinks are exposed when any assembly is in the service position, and when the heat sink cover is removed.

6-7. Initial Access Procedure

Before accessing any module from the top or bottom of the instrument, proceed as follows to remove the top cover and verify that high voltage on the power supply capacitors has been bled off:

1.Turn off the POWER switch.

2.Remove the line power cord from ac line power.

3.Wait three minutes.

4.Remove the top cover by removing the screws accessible on the top surface (three front, three rear).

Warning

Before touching anything inside the 5725A, do the following steps to make sure high voltage has been bled off.

5.Refer to Figure 6-4 for the location of items mentioned in this procedure. Remove the five retaining screws on the High Voltage Amplifier assembly (A3). (Two screws secure each side rail, and one seats the board into a mating connector on the Interconnect assembly.) Lift the High Voltage assembly by pulling on the plastic wire-tie loops, pivot it, and insert its metal pegs in the two holes on the chassis as Figure 6-4 shows. This puts the High Voltage Amplifier assembly in the service position.

6-7

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Fluke 5725A instruction manual Initial Access Procedure

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.