5725A

Instruction Manual

latch up by eliminating positive feedback resulting from positive output voltages from U100. Op amp U105 is simply a low-noise inverting amplifier that scales the sensor output to 10 dB below the 5700A Oscillator output level. The output of the calibration circuit, AC/AC, goes to the 5700A during calibration through the analog monitor section.

Analog Monitor Section

4-56.

The 16-channel multiplexer, U151, takes a variety of inputs from all analog assemblies and provides a means of switching them to either a comparator, U154A, or to the B-RCL line via K152. During normal operation, the multiplexer output is routed exclusively to the comparator. Calibration requires routing the multiplexer output to the B-RCL line, which is routed back to the 5700A. The B-RCL line is measured by the precision adc circuit on the 5700A DAC assembly. All inputs to the multiplexer are scaled so that inputs are within its ±15V power supply range. Table 4-4 shows the signal name of the multiplexer input, its description, origin, and purpose.

The state of the multiplexer is controlled by the microprocessor via data latched into U152.

STANDBY VOLTAGE LIMITS(1)

Table 4-4. Signals Monitored by the Analog Monitor Section

SIGNAL

PHYSICAL

SOURCE

PURPOSE

NAME

PARAMETER

 

 

 

 

 

 

-0.125V

+400V IM

Supply Current

Power Supply

Monitoring

+0.125V

-400V IM

Supply Current

Power Supply

Monitoring

0.26V

+400V M

Supply Voltage

Power Supply

Monitoring

-0.26V

-400V M

Supply Voltage

Power Supply

Monitoring

VCOM

System Supply Common

Power Supply

Monitoring

HVCOM M

High Voltage Supply

Power Supply

Monitoring

 

 

Common

 

 

1.7V

HVTEMP M

Voltage Amp Heat Sink

High Voltage Amplifier

Monitoring

 

 

Temp.

 

 

2.0V

ITEMP M

Current Amp Heat Sink

Current Amplifier

Monitoring

 

 

Temp.

 

 

-2.2V

ICOMPL M

Current Output Stage

Current Amplifier

Monitoring

 

 

Drive Level

 

 

I CAL/I FB

Shunt Voltage

Current Amplifier

Calibration, AC I

 

 

 

 

Operation

AC/AC

Calibrator Output

High Voltage Sense

Calibration

HVSENSE

Sense Amp Output

High Voltage Sense

Calibration

DAC OUT

DAC Output

High Voltage Sense

Monitoring

0.08, 2.0V

FAN M

Fan is On or Off

Power Supply

Monitoring

 

 

 

 

 

Note 1: For single limit values, the limit is equal to, or smaller in magnitude to, the value shown.

4-34

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Fluke 5725A instruction manual Signals Monitored by the Analog Monitor Section

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.