Diagnostic Testing and Troubleshooting (2620A/2625A)

5

Analog Troubleshooting

 

 

 

 

 

 

 

 

 

A3TP2

 

 

 

 

 

 

 

 

 

 

 

 

A3TP8

 

 

 

 

 

A3TP3

 

 

 

 

 

 

 

 

 

 

A3TP7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A3TP4

 

 

 

 

 

 

 

 

A3TP1

 

 

 

 

 

 

 

 

 

 

 

 

 

RMS Converter

 

 

 

 

 

 

 

 

A3TP5

 

 

 

 

A/D Microcontroller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Network

A3TP13

 

 

 

 

 

 

 

 

 

 

 

A3TP6

 

 

A3TP10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A3TP11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RMS Converter

A3TP12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A3TP9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC Buffer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Analog

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Zener Reference

 

Measurement

 

 

Intergrate Resistors, Reference Divider

 

Processor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC Divider

Divider

 

VSSAC

 

 

 

 

AGND2

 

 

 

 

RMSG1

VSSRMS

 

 

RMSC2

 

 

 

Network

 

 

 

 

 

 

 

 

 

BIAS2

RMS0

 

RMSF

 

Network

 

ACR1

ACR2

ACR3

ACR4

 

ACB0

VDD

RMSI

ARTN

 

 

 

AIN

 

 

(DC/OHMS)

 

 

 

 

 

9

8

7

6

5

4

3

2

1

68

67

66

65

64

63

62

61

 

 

 

REFJ

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

60

FA0

 

 

LO

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

59

FAI

 

A3U8 ANALOG

GUARD

12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

58

AFI

 

RRS

13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

57

MOF

 

MEASUREMENT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V4 14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

56

AF0

 

PROCESSOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V3 15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

55

RA–

 

 

V1 16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

54

RA+

 

 

GUARD 17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

53

RA0

 

 

V2F 18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

52

VREF–

 

 

V2 19

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

51

VREF+

 

 

GUARD 20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

50

B3

 

 

V0

21

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

49

B1

 

 

GUARD 22

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

48

B.3

 

 

0/VS

23

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

47

B.1

 

 

GUARD 24

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

46

SUM

 

 

AGND1 25

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

45

INT

 

 

 

26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

44

VSS

 

 

 

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

 

 

 

 

DGND

FC0

FC1

FC2

FC3

FC4

FC5

FC6

FC7

OSCIN

OSC0

MRST

AS

AR

SK

CS

BRS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

s35c.eps

 

Figure 5-4. Test Points, A/D Converter PCA (A3, A3U9)

5-15

Page 184 Page 186
Page 185
Image 185
Fluke 2625A, 2635A service manual Test Points, A/D Converter PCA A3, A3U9
Page 184 Page 186

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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