Schematic Diagrams 8

1/8A SB

2 6 2 0 A - 6 5 0 1

L

N

EG

R48

M H 1

10K

1/4W

C39

.047

100V

2

3

 

 

 

CR1

J3

C R 3

 

M B R D 3 6 0

 

 

 

1

 

 

 

 

1N5397

 

 

2

C 2

S1

 

 

.033

 

 

 

100V

 

 

 

C R 2

 

 

3

 

 

 

 

1N5397

 

 

 

OFF

U19

 

 

LM317L

 

 

IN

OUT

 

 

 

ADJ

 

C1

C 7

R44

 

1.30K

 

220

10000

1%

 

35V

35V

 

 

 

R46

 

 

4.02K

C34

 

 

1%

 

 

 

1.0

 

 

 

50V

8

1

U 28

4 LM358DT

9 7

RT1

RXE065

C 5 9

180PF

R20

59.0K

1%

R19

11.0K

TP71%

T1

12

NOTE: U22 AND U23 ARE BIASED BY IBIAS

 

IBIAS

 

 

 

 

 

 

 

11

U23

U23

U2 3

 

U23

8 H C U 0 4 9 6

H C U 0 4 5

4 H C U 0 4

3 2

H C U 0 4 1

 

R40

C35

R47

10

 

1000PF

 

5.1K

 

10K

 

 

 

 

 

1

TP14

 

IRL024

 

 

 

Q 8

 

 

 

 

R34

 

 

 

 

 

 

 

 

 

 

SHEET

5

 

 

 

 

 

 

 

 

D C H

 

 

 

 

 

 

 

 

DCL

 

 

 

 

 

 

 

 

SHEET

4

 

 

 

 

 

 

 

 

VPF

 

R13

MMBT3906

 

 

 

TP31

 

 

 

 

 

 

 

 

VDD

 

 

20

Q 2

 

C 9

 

 

 

 

 

Q1

 

 

 

 

 

 

 

 

180PF

 

VR2

 

 

C R 6

 

 

 

 

 

 

 

 

MMBT3906

 

 

Q 4

 

1N5233

 

 

 

 

 

 

 

 

 

 

R11

 

R 9

MMBT3904

C4

 

 

M B R 1 4 0

 

 

 

 

 

 

 

 

4 7 K

 

4.7K

 

 

1.0

 

 

 

 

 

 

 

 

C R 5

 

U 6 LM317T

 

 

50V

 

 

 

 

 

 

VDDR

 

 

IN

 

OUT

 

 

 

 

 

 

 

 

 

 

 

M B R 1 4 0

 

ADJ

 

 

 

 

P10

C12

 

R 6

 

R 5

 

 

C 6

9

 

470

TP30

 

 

 

10

6

 

 

 

 

 

 

 

16V

 

3.32K

 

1.00K

 

 

63V

7

A/D

 

 

1%

 

1%

 

 

R C O M

4

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

SHLD

1

SUPPLIES

 

 

 

 

 

 

 

 

10

C13

 

R14

 

 

 

 

8

470

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16V

R4

10K

 

 

 

 

A

 

 

 

 

 

 

 

 

10K

 

 

 

 

 

 

 

 

 

Q 3

 

 

C 5

 

 

C R7

 

 

 

 

 

 

R12

R10

 

 

 

 

1.0

 

 

BAW56

 

 

 

 

 

 

 

 

 

 

50V

 

 

 

 

 

 

 

 

 

 

 

 

47K

4.7K

MMBT3906

VR1

 

 

 

 

 

1N5232

 

 

 

Q 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MMBT3904

 

 

 

 

 

 

 

 

 

Q 5

C10

 

C R4

 

 

 

 

 

BAS16

TP32

 

R15

 

 

180PF

 

 

 

 

 

 

 

 

 

 

VSS

 

 

 

 

 

 

T2

4

 

 

 

 

 

 

 

 

 

 

 

 

2

5

 

 

 

 

FLUKE45-6401

 

 

 

 

 

 

VIN VSW

4

 

 

 

C26

 

 

 

 

LT1170

2

 

8

 

47

U 9

FB

 

LM358DT

5

50V

G N D

VC

 

7

 

6

CR10

3

1

 

U 28

 

M B R D 3 6 0

 

 

 

 

 

 

R26

R31

4

 

VCC

 

 

11.0K

 

 

 

 

 

 

 

 

 

100

1%

 

 

 

TP2

C21

0.1

25V

C18

R30

C14

220

45.3K

2200

35V

1%

10V

TP1

 

 

 

470

 

2

 

 

4

 

 

 

 

 

 

 

 

 

 

2 D

P R

Q 5

CR12

TP9

7

1

 

 

 

HC74

BAS16

 

3

6

 

 

 

3

 

 

 

IRL024

8

U22

 

R28

Q 7

 

6

 

 

 

 

 

 

 

 

 

 

CL

Q

470

 

 

5

 

 

 

 

 

 

 

1

 

CR11

TP10

 

 

 

 

1

 

 

 

 

 

 

BAS16

 

 

 

 

 

 

 

 

R38

 

 

 

 

 

 

0.02

4

 

 

 

 

 

 

 

 

 

 

 

1/4W

 

 

10

 

 

C30

 

 

 

 

47

 

12

 

9

 

 

50V

 

P R

 

 

RI

 

D

Q

 

U 23

 

 

H C 7 4

 

 

 

 

 

 

 

 

11

 

 

11

 

10

 

 

 

 

H C U 0 4

 

 

U22

8

 

U 23

CR13

 

 

 

 

M M B D 7 0 0 0

 

 

CL

Q

13 H C U 0 4

12

C31

 

13

47

 

 

 

 

50V

RI

 

33

M M B T 3 9 0 4

 

 

 

 

 

 

 

 

 

 

 

 

 

TP5

5VAC

 

 

 

 

 

TP6

 

 

 

 

 

 

 

 

 

 

 

 

 

J2

DISPLAY

CR9

 

 

 

1

 

M M B D 7 0 0 0

 

TP4

FIL1

2

 

 

 

 

FIL2

3

 

SUPPLIES

 

 

 

 

4

 

 

 

 

VLOAD

7

 

 

 

 

VEE

6

 

 

 

 

 

8

 

CR8

 

VR3

 

VCC

 

 

1N5235B

 

 

 

 

M M B D 7 0 0 0

 

 

 

 

 

 

 

 

 

C17

 

VEE

 

 

 

 

2.2

 

 

R22 50V

U18 TP3 47K

LM79L05A

IN OUT

G N D

C32

1.0

50V

2635A-1001

(1 of 5)

s75f.eps

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

8-9

Page 290 Page 292
Page 291
Image 291
Fluke 2625A service manual 2635A-1001
Page 290 Page 292

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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