5725A

Instruction Manual

The 5700A/5725A system uses the following method for ac amplitude control:

1.An rms thermal sensor alternately measures two signals: an unknown but adjustable ac signal, and a known calibrated dc signal.

2.The output of the thermal sensor is measured by the adc, allowing settling time for the sensor each time its input is changed. The ac signal is adjusted until the thermal sensor output is the same for both signals. Thus, the dc voltage at the output of the thermal sensor is not important, but differences in the dc voltage when the sensor input is switched between the ac variable and dc reference are important.

To ensure safe, reliable operation, the High Voltage Amplifier is turned on in the following sequence:

1.The 5700A Oscillator is set to the 22V range and its output is channeled to the 5725A High Voltage Amplifier on line BOOST IN.

2.Then the output of the High Voltage Amplifier is connected to the appropriate high voltage step-up transformer (one of three).

4-4. 11A Range Functional Description

The 5725A Current Amplifier is a transconductance amplifier that has a compliance voltage of 3.0V rms for the ac current function and 4.0V for the dc current function. The transconductance amplifier has a gain of -5 (e.g., 1V in gives -5A out). Either the 5700A 2V range for dc operation, or the Oscillator for ac operation, drives the transconductance amplifier. Input voltage to the transconductance amplifier comes in on BOOST IN (for ac current) or B-FEEDBACK (for dc current) and enters the High Voltage Sense assembly. From there it is routed to the error amplifier on the Current assembly whenever the 5725A is in the current function. The B-FEEDBACK line returns the current calibration amplifier output to OSC SENSE HI during ac current operation.

The following assemblies are active in the 5725A current function:

In the 5700A: CPU, DAC, Oscillator, Switch Matrix, Motherboard, Rear Panel assemblies. (Plus the Oscillator assembly in the ac current function.)

In the 5725A: CPU, Current, High Voltage Sense, Digital, and Power Supply.

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Fluke 5725A instruction manual Range Functional Description

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.