5725A

Instruction Manual

Problem 3: Fault When Entering Voltage Operate

7-6.

Proceed as follows to isolate the problem in this condition:

1.Suspect the 5700A/5725A interface cable.

2.Check the analog monitor circuit on the High Voltage Sense Assembly as in step 1 on conditions 1 and 2.

3.Suspect the High Voltage Amplifier assembly and the output transistor heat sink assemblies.

Problem 4: Fault When Entering Current Standby

7-7.

Proceed as follows to isolate a problem in this condition:

1.If an overcompliance error is showing (fault 211), check for proper closing of the standby relay on the Current assembly (K202).

2.Check the analog monitor circuit on the High Voltage Sense Assembly as in step 1 on conditions 1 and 2.

Problem 5: Fault When Entering Current Operate

7-8.

Proceed as follows to isolate a problem in this condition:

1.If an overcompliance error is showing (fault 212):

a.Check for an open or too high resistance load.

b.Suspect an open internal current output cable, or the Current Amplifier assembly.

2.Check the analog monitor circuit on the High Voltage Sense Assembly as in step 1 on conditions 1 and 2.

Reduced-Voltage Troubleshooting Mode

7-9.

The high voltage supply on the Power Supply assembly (A4) allows normal operation from a pair of nominal 400V dc supplies, or troubleshooting operation in a reduced voltage mode with a pair of nominal 50V dc supplies. To switch between normal and reduced-voltage operation, proceed as follows:

1. Turn off the POWER switch and disconnect the line power cord from ac line power.

Warning

Follow the instructions under "Initial Access Procedure" in section 6 to make sure high voltage has been bled off before you touch anything inside the 5725A.

The power supply assembly generates lethal voltages. 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. 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.

2.Place the Power Supply assembly in the service position as described in the access procedures in Section 6.

7-8

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Fluke 5725A instruction manual Reduced-Voltage Troubleshooting Mode, Problem 3 Fault When Entering Voltage Operate

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.