XTI

TOTI*

Schematic Diagrams 8

DI<7..0>

0

0

1

1

2

2

3

3

4

4

5

5

6

6

7

DO<7..0>

7

AO<3..0>

U 3

L M 3 2 4 D

14

1Z1

350K

1019

55K

U 3

L M 3 2 4 D

8

18Z1

350K

1017

55K

U 3

L M 3 2 4 D

1

14Z1

350K

1013

55K

U 3

L M 3 2 4 D

7

12Z1

350K

1011

55K

U 4

L M 3 2 4 D

8

6Z1

350K

107

55K

U 4

L M 3 2 4 D

14

4Z1

350K

105

55K

U 4

L M 3 2 4 D

1

2Z1

350K

103

55K

U 4

L M 3 2 4 D

7

8Z1

350K

109

55K

VCC

13

19

Z3

2

 

12

 

47K

Z 2

 

 

8

16

 

CR14

2 2 K

 

BAW56

U17

9

 

 

 

 

 

5

 

12

 

 

 

ULN2004

9

18

Z3

3

 

10

 

47K

Z 2

 

 

2

16

 

 

 

2 2 K

 

 

 

U27

9

 

 

1

 

16

 

 

 

ULN2004

2

15

Z3

6

 

3

 

47K

Z 2

 

 

1

16

 

CR18

2 2 K

 

BAW56

U27

9

 

 

 

 

 

2

 

15

 

 

 

ULN2004

6

17

Z3

4

 

5

 

47K

Z 2

 

 

3

16

 

 

 

2 2 K

 

 

 

U27

9

 

 

3

 

14

 

 

 

ULN2004

9

1

Z3

20

 

10

 

47K

Z 2

 

 

4

16

 

CR19

2 2 K

 

BAW56

U27

9

 

 

 

 

 

4

 

13

 

 

 

ULN2004

13

11

Z3

10

 

12

 

47K

Z 2

 

 

5

16

 

 

 

2 2 K

 

 

 

U27

9

 

 

5

 

12

 

 

 

ULN2004

2

12

Z3

9

 

3

 

47K

Z 2

 

 

6

16

 

CR16

2 2 K

 

BAW56

U27

9

 

 

 

 

 

6

 

11

 

 

 

ULN2004

6

13

Z3

8

 

5

 

47K

Z 2

 

 

7

16

 

 

 

2 2 K

U27 9

710

ULN2004

R57

47

1/4W

C51

180PF

R56

47

1/4W

C 5 0

180PF

R55

47

1/4W

C 4 9

180PF

R54

47

1/4W

C 4 8

180PF

R53

47

1/4W

C 4 7

180PF

R52

47

1/4W

C 4 6

180PF

R51

47

1/4W

C 4 5

180PF

R50

47

1/4W

C 4 4

180PF

 

 

EXTERNAL

TRIGGER

 

 

 

 

 

 

 

 

AND TOTALIZER

 

 

 

 

 

 

 

 

 

INPUTS

 

 

VCC

 

 

 

 

 

 

 

 

 

 

 

7

Z3

14

 

 

 

 

R58

 

 

 

 

 

 

 

 

 

 

 

 

 

 

47K

Z 2

470

 

 

 

 

CR15

14

16

 

 

 

C 5 4

 

 

 

 

2 2 K

 

 

 

180PF

 

 

U 8

 

BAW56

 

 

 

 

 

R49

 

 

 

 

 

 

 

 

 

 

 

L M 3 5 8 D

2

5

Z3

16

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

47K

Z 2

470

 

16

 

3

 

 

13

16

 

 

 

C 4 3

Z1

350K

 

 

Q 9

2 2 K

 

 

 

180PF

10

15

 

 

 

 

 

 

 

 

 

55K

 

 

MMBT5089

 

 

 

 

 

 

 

 

 

 

 

Z 2

 

 

 

 

U 8

 

 

 

 

 

 

15

16

 

 

 

 

 

 

 

 

 

 

 

 

L M 3 5 8 D

 

 

 

 

 

 

2 2 K

 

 

 

 

 

 

CR17

 

 

7

 

 

 

 

 

 

 

 

 

 

M M B D 7 0 0 0

 

 

9

TP18

 

 

 

 

 

 

 

 

 

 

U 4

U 3

U 8

 

 

U17

 

 

 

 

 

 

 

 

 

 

 

VCC

 

 

 

 

 

10

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C61

C 3 8

C 3 3

 

 

ULN2004

 

 

 

 

 

.1

.1

.1

 

 

9 U17

U N U S E D

 

25V

25V

25V

 

 

 

 

 

 

 

 

11

 

6

 

 

 

 

 

 

 

 

 

ULN2004

 

 

 

 

 

 

 

 

VCC

 

 

9

Z 2

 

 

U17

9

16

0

1

16

2 2 K

R62

 

 

 

ULN2004

C 5 8

47

 

 

 

1/4W

 

 

 

180PF

 

 

 

9

Z 2

 

 

U17

10

16

1

2

15

2 2 K

R61

 

 

 

ULN2004

C 5 7

47

 

 

 

1/4W

 

 

 

180PF

 

 

 

9

Z 2

 

 

U17

11

16

2

3

14

2 2 K

R60

 

 

 

ULN2004

C 5 6

47

 

 

 

1/4W

 

 

 

180PF

 

 

 

9

Z 2

 

 

U17

12

16

3

4

13

2 2 K

R59

 

 

 

ULN2004

C 5 5

47

 

 

 

1/4W

 

 

 

180PF

 

XT*

TOT

VCC

R37

9.1K

6

5

C 2 9 R36

.1 3.6K

25V

 

 

J5

IO0

10

 

IO1

9

I/O

IO2

8

 

IO3

7

DIGITAL

IO4

6

 

IO5

5

 

IO6

4

 

IO7

3

 

 

2

 

 

1

 

SHEET 2

 

 

D C H

 

 

DCL

 

J6

 

8

OUTPUTS

 

 

 

7

 

OUT0

6

 

OUT1

5

 

OUT2

4

ALARM

OUT3

3

 

2

 

 

 

1

 

L2 L1

6T 1T

D O _ G N D

C 5 2 C 5 3

180PF 1000PF

RV1

41V

2635A-1001

(5 of 5)

s79f.eps

Figure 8-2. A1 Main PCA (2635A) (cont)

8-13

Page 294 Page 296
Page 295
Image 295
Fluke 2625A, 2635A service manual External Trigger Totalizer Inputs
Page 294 Page 296

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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