Theory of Operation (2620A/2625A)

2

Functional Block Description

 

ANALOG INPUT CONNECTOR

 

 

 

 

INPUT MULTIPLEXING

 

 

 

 

INPUT PROTECTION

 

 

 

 

INPUT SIGNAL

 

 

 

 

CONDITIONING

 

 

 

 

ANALOG

 

 

 

 

MEASUREMENT

 

 

 

 

PROCESSOR

 

 

 

 

(A/D CONVERTER)

 

 

 

 

MICRO CONTROLLER

 

 

A/D CONVERTER

 

 

 

 

 

 

 

 

PCA

INGUARD

SERIAL

 

 

GUARD

 

 

 

 

OUTGUARD

COMMUNICATION

 

 

CROSSING

VACUUM FLUORESCENT

 

 

 

DIGITAL

DISPLAY

 

 

 

I/O

 

 

 

 

RS-232

DISPLAY CONTROLLER

μP

 

 

 

 

 

 

 

 

RAM

ROM

 

FRONT PANEL

CALENDAR

 

IEEE-488

CLOCK

 

OPTION -05

SWITCHES

 

 

 

(2620A ONLY)

 

EEPROM

 

 

 

DISPLAY ASSEMBLY

CALIBRATION

 

 

 

CONSTANTS

 

 

 

 

 

 

MEMORY

 

 

 

 

 

 

 

 

(2625A ONLY)

 

DIGITAL KERNEL

 

 

POWER

+5.6 Vdc (Vddr)

 

 

SUPPLY

 

 

–5.4 Vdc (Vss)

INGUARD

 

 

 

 

+5.3Vdc (Vdd)

 

 

–30 Vdc

 

 

 

MAIN PCA ASSEMBLY

+5.1 Vdc (Vcc)

OUTGUARD

 

–5 Vdc

 

 

 

 

 

 

5.4 Vac

 

 

 

 

 

 

 

s2f.eps

Figure 2-2. Overall Functional Block Diagram

2-5

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Image 53
Fluke 2635A service manual Theory of Operation 2620A/2625A Functional Block Description
Page 52 Page 54

2635A, 2625A specifications

The Fluke 2625A is a sophisticated data logger designed for a wide range of industrial and laboratory applications. This versatile instrument excels in capturing and monitoring temperature and voltage measurements with precision and reliability. One of its standout features is its ability to record data from various sensors, making it ideal for environments where comprehensive data acquisition is critical.

Equipped with a large LCD display, the Fluke 2625A provides clear and user-friendly access to real-time measurement data. Its graphical interface allows users to visualize trends and monitor readings easily, which significantly enhances usability. The device supports a variety of input types and can connect to thermocouples, RTDs, and other sensors, offering great flexibility for various measurement tasks.

The Fluke 2625A employs advanced measurement technologies that ensure accuracy in data logging. With a high sampling rate, it captures fast-changing signals while maintaining data integrity. The device features a built-in memory that allows for extensive logging, accommodating long-term monitoring tasks without requiring constant oversight. Users can set it to log data at specified intervals, offering customizable solutions for different monitoring needs.

Another significant characteristic of the Fluke 2625A is its robust communication capabilities. The device supports USB and RS-232 interfaces for easy connectivity with computers and other devices, making data transfer and analysis seamless. This feature is especially beneficial for users who need to compile or analyze large sets of data quickly.

Furthermore, the Fluke 2625A is designed with durability in mind. Its rugged construction makes it suitable for challenging environments, including those with high levels of vibration, dust, or moisture. This reliability ensures that the device can withstand the rigors of fieldwork while still delivering accurate measurements.

In summary, the Fluke 2625A is a powerful data logger that combines versatility, accuracy, and reliability. Its user-friendly interface, advanced measurement technologies, and robust design make it an essential tool for professionals in various industries, from manufacturing and HVAC to research and development. Whether monitoring temperature changes in a laboratory or assessing voltage levels in an industrial setting, the Fluke 2625A stands out as a trusted solution for effective data logging and analysis.
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