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Fluke NetDAQ 2640A, Service Manual

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Fluke NetDAQ 2640A Service Manual Download Page 254

2640A/2645A
Service Manual

7-22

A

K27

 

2500PF

C82

Q19

SB90041

R135

24.9K

A

100K

R103

Q22

MPS6560

0.1

C81

30.1K

R136

.047

C79

MPS6560

Q21

Q20

SB90041

30.1K

R137

R133

1.00K

100K

R134

R102

100K

CR6

BAV99

R129

10

R132

100K

A

MPS6560

Q17

A

 

 

R104

100K

R108

30.1K

 

 

A

R127

1.00K

0.1

C59

18K

2K

54-4118TT

Z5

R119

1.00K

A

33

C71

33

C72

470

C65

470

C64

1K

R138

C73

2200PF

1.013K

Z6

12.25K

Z6

111.1K

Z6

1.111M

Z6

47K

R74

47K

R97

47K

R105

Q7

SB90041

Q6

SB90041

A

U23

LM393DT

14K

14K

54-4111T

Z3

14K

14K

54-4111T

Z4

U29

LF357M

1K

Z7

10M

Z7

 

1M

100K

10K

1K

Z7

Z2

3.3K

AD706

U27

AD706

U31

AD706

U27

TP2

TP1

R125

22

A

R126

100K

A

A

R107

10

R106

10

47

R118

U26

AD637KD

DB

RMSOUT

CHPSEL

OFFNUL

ACOM

VIN

CAV

DENIN

BUFIN

BUFOUT

VSP

VSM

LT1006

U28

W8

MC34072D

U32

MC34072D

U32

LM393DT

U23

U31

AD706

Q18

MPS6560

10

C68

10

C67

2.776K

Z6

115.7

Z6

Q8

SB90041

Q23

SB90041

Z8

2.0K

14.0K

48.336K

R143

47K

RELAY/STATUS PORT

RP1

RP0

RP2
RP3

RP5

RP7
RP6

RP4

OSCILLATOR

G_AMP

FREQ_COMP

LO2

AGND

AGND

HGRD

HGRD

LGRD

LOV

LO1

IOUT

IG

S18

SGRD

IS

S46

NBIAS

HGRD

HGRD

AGND

BIAS

AGND

TCO

BIAS_AMP

AGND

BIAS

NBIAS

ACFO

ACFI

ACA-

HI

ACAO

ACA+

AGND

HGRD

HGRD

DCF2

HGRD

DCFO

DCFI

F_AMP

C-

HGRD

C+

ACR+

VDD

VSS

ACR4

ACR5

ACR2

ACR3

HRESET

FIN

BR+

DCA+

DCAO

DCA-

HGRD

BR-

BR1

BR2

BR3

BR4

LGRD

VDD

RESET

DGND

LGRD

LO

G_AMP

LGRD

BRS

SCK

RCV

SND

CS*

SERIAL COMM

DGND

XOUT

XIN

VSS

RP7

ACR1

ACR-

HGRD

TR

HGRD

HI2

HGRD

HI1

VDD

V3S

V3

HGRD

SGRD

SGRD

V7

SGRD

V6S

V6

SGRD

V5S

V5

SGRD

V4S

V4

RP6

RP5

RP4

RP3

RP2

RP1

RP0

SGRD

V7S

LGRD

CTRI

DCLO

S1

S6

S11

S7

S2

S3

S8

S12

S13

S9

S4

S5

S10

S14

S15

S35

S24

S30

S23

S29

S22

S28

S21

S36

S37

S57B

S56B

S55B

S49

S48

S47

S45

S44

S62B

S39

S62A

S61A

S50

S43

S42

S40

S41

S59B

S60B

S60A

S59A

S58A

S19

DCHI

S31

S64

S20

SOURCE

1.2V, 3V 

S27

S16

S17

S65

S34

S26

S32

S33

S25

S54A

S57A

S56A

S55A

S54B

S53

F_AMP

MRST

HRESET

RESET

189PF

C1

VDD

SCK

RCV

BRS

HRESET

CS

SND

STALLION

S51

S52

S61B

S58B

S63

S38

4.95K

Z2

R145

10K

Q33

MMBT3906

R146

270

 

NBC

SB90041

Q24

SB90041

Q9

R147

1.07K

A

R155

510

L52

15M

R183
59.0K

A

A

 

R156

6.2K

180PF

C98

CR15

MMBD7000

A

180PF

C97

A

68PF

C85

Q26

SB90041

Q25

SB90041

A

A

C70

0.1

C69

0.1

0.1

C78

0.1

C58

VR3

6.0V

A

47K

R121

47K

R122

C76

4.3PF

R120

47K

R117

22

Q10

SSTH17

Q11

SSTH17

Q12

SSTH17

Q14

SSTH17

Q15

SSTH17

SSTH17

Q16

47K

R123

47K

R124

Q13

SSTH17

 

VR2

6.0V

C75

0.1

A

A

 

A

 

A

BAV99

CR5

A

3.45K

R128

C80

0.1

1.0

C66

A

K25

R139

100K

R131

10

R130

100K

K26

 

R111

1K

0.1

C57

R110

1K

 

VIA

TP5

TP6

TP7

VIA

VIA

54-4098T

R

(FRDY)

(30VDC, 300VDC HI-SENSE, OHMS-HI-SOURCE)

(OHMS, .3VDC & 3VDC)

S

R

S

(30VDC, 300VDC-LO-SENSE, OHMS-LO-SOURCE)

(.3VDC, 3VDC, OHMS-LO-SENSE)

TP4

VIA

R

S

100

99

98

97

96

95

94

93

92

91

90

89

88

87

86

85

84

83

82

81

80

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78

7 7

76

75

7 4

73

72

71

7 0

69

68

67

66

65

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

48

4 7

46

45

4 4

43

42

41

4 0

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

U30

3

2

1

4

3

8

7

9

7

3
2

1

7

4

7

5

7

6

14

12

10

13

11

9

8

6

4

7

5

3

8

6

4

13

11

9

8

6

4

13

11

9

8

4

3

2

1

8

7

6

5

4

8

7

6

5

4

3

2

1

8

4

3

2

1

8

7

6

5

4

7

6

4

3

2

8

7

6

5

4

3

2

1

11

10

9

8

4

3

2

1

8

4

3

2

1

8

7

6

5

4

8

7

6

5

4

14

13

11

10

9

8

7

6

5

4

3

1

3

2

1

3

2

1

3

2

1

4

3

2

1

2%

50V

RGRD

1%

VCLAMP

VCLAMP

3W

1/4W

CH24

CH24

1000V

CH24

VDD

1%

VDD

VSS

VDD

VSS

1%

OTC

VDD

1%

1%

VDD

VSS

1%

OTC_EN

OTCCLK

3W

LO

RJ SENSE

HI

FUSIBLE

VSS

VAC-

VDDB

AD HI

AD LO

RI

VSSB

FUSIBLE

CH24

CH24

1%

1%

VAC-

VAC+

6V

6V

25V

VAC+

ACR5

VAC-

25V

VDD

50V

VAC-

VSS

1%

RI

VDD

VSS

1%

1%

1%

160V

100V

+3.45V

STAL INTERRUPT

25V

1%

HI SENSE

LO SENSE

250V

16V

VAC+

10V

10V

160V

160V

VDD

VDD

25V

SB RECV

STAL SELECT*

SB XMIT

SB CLK

DISCHARGE

1%

VDD

1%

25V

VSS

FOUT

VSS

VDDB

IG RESET*

1%

16V

VSSB

VDD

VDD

VSS

50V

1%

LOW

VSSB

VDDB

1/4W

50V
2%

50V
2%

2640A-1003

(Sheet 3 of 6)

Figure 7-4. 2645A A3 A/D Converter PCA Assembly (cont)

Summary of Contents for NetDAQ 2640A

Page 1: ...942615 March 1995 1995 Fluke Corporation Inc All rights reserved Printed in U S A All product names are trademarks of their respective companies 2640A 2645A NetDAQ Data Acquisition Tools Service Manu...

Page 2: ...he warranty period To obtain warranty service contact your nearest Fluke authorized service center or send the product with a description of the difficulty postage and insurance prepaid FOB Destinatio...

Page 3: ...D ON EQUIPMENT WARNING Risk of electric shock Refer to the manual GROUND Ground terminal to chassis earth Attention Refer to the manual This symbol indicates that information about usage of a feature...

Page 4: ...remove the instrument cover without first removing the power source connected to the rear panel Do not operate the instrument without the cover properly installed Normal calibration is accomplished wi...

Page 5: ...ime Clock and Calendar 1 12 1 20 2640A Specifications 1 13 1 21 2640A DC Voltage Measurement Specifications 1 13 1 22 2640A AC Voltage Measurement Specifications 1 14 1 23 2640A Four Wire Resistance M...

Page 6: ...9 20 Channel Terminals 2 10 2 20 Reference Junction Temperature 2 10 2 21 Detailed Circuit Description 2 10 2 22 A1 Main PCA Circuit Description 2 10 2 23 Power Supply Circuit Description 2 10 2 31 Di...

Page 7: ...ouple Detector 2 57 2 103 Channel Measurements 2 57 2 104 Reading Rates 2 57 2 105 Measurement Types 2 58 2 112 Autoranging 2 60 2 113 Overload 2 61 2 114 Housekeeping Readings 2 61 2 115 Reading Type...

Page 8: ...racy Test 2645A 4 9 4 8 Volts AC Accuracy Test 4 10 4 9 Frequency Accuracy Test 4 10 4 10 Analog Channel Integrity Test 4 11 4 11 Computed Channel Integrity Test 4 11 4 12 Thermocouple Temperature Acc...

Page 9: ...14 COMM Parameter Reset 5 9 5 15 Using the RS 232 Interface 5 9 5 16 Command Processing 5 10 5 17 Instrument Configuration 5 11 5 18 Command Set 5 12 5 19 Troubleshooting the Instrument 5 19 5 20 Gen...

Page 10: ...Service Manual vi 6 List of Replaceable Parts 6 1 6 1 Introduction 6 3 6 2 How To Obtain Parts 6 3 6 3 Manual Status Information 6 3 6 4 Newer Instruments 6 4 6 5 Service Centers 6 4 7 Schematic Diagr...

Page 11: ...solution Specifications 1 15 1 18 2640A AC Voltage Accuracy Specifications 1 15 1 19 2640A Four Wire Resistance Temperature Coefficient 1 16 1 20 640A Four Wire Resistance Range and Resolution Specifi...

Page 12: ...Settling Time 2 53 2 19 A D Command Codes 2 55 2 20 A D Readings to Average to Obtain a Measurement 2 58 2 21 Frequency Sensitivity 2 60 2 22 A D Readings to Average to Obtain a Reference Balance Meas...

Page 13: ...ons 5 32 5 15 Calibration Constants 5 35 5 16 Files on the Firmware Diskette 5 37 6 1 2640A 2645A Final Assembly 6 5 6 2 A1 Main PCA Assembly 6 10 6 3 A2 Display PCA Assembly 6 15 6 4 2640A A3 A D Con...

Page 14: ...NetDAQ Service Manual x...

Page 15: ...4 A D Timing 2645A Normal Reading 2 54 2 15 A D Timing 2640A Normal Reading 2640A and 2645A Reference Balance 2 54 2 16 A D Status Signals 2 55 3 1 Replacing the Fuse 3 6 3 2 2640A and 2645A Assembly...

Page 16: ...ervice Manual xii 6 2 A1 Power Supply PCA 6 14 6 3 A2 Display PCA Assembly 6 16 6 4 2640A A3 A D Converter PCA Assembly 6 21 6 5 2645A A3 A D Converter PCA Assembly 6 26 6 6 A4 Analog Input PCA Assemb...

Page 17: ...utput Capabilities 1 10 1 14 Digital I O 1 10 1 15 Trigger In 1 11 1 16 Trigger Out 1 11 1 17 Master Alarm 1 11 1 18 2640A 2645A Totalizer 1 12 1 19 2640A 2645A Real Time Clock and Calendar 1 12 1 20...

Page 18: ...nt Specifications 1 21 1 32 2645A Four Wire Resistance Measurement Specifications 1 23 1 33 2645A Two Wire Resistance Measurement Specifications 1 23 1 34 2645A Four Wire RTD per ITS 1990 Measurement...

Page 19: ...s ac volts ohms temperature frequency and dc current Temperature measurements use thermocouples or resistance temperature detectors RTDs Refer to Table 1 2 for a summary of instrument measurement capa...

Page 20: ...0 3 C 0 6 C Resistance Temperature Detectors RTDs Resolution 0 003 C 0 03 C Resistance Temperature Detectors RTDs Accuracy 0 12 C 0 2 C Time to Change Functions Between V dc V ac Frequency and Ohms 6...

Page 21: ...ength must be at least 50 mV ac rms 4 Shunt resistor required enter value default is 10 ohms The 4 to 20 mA scale displayed as 0 4 mA to 100 20 mA Table 1 3 Summary of 2640A 2645A Features Feature Des...

Page 22: ...ALARM TRIGGER I O connectors 2620A 101 4 20 mA Current Shunt Strip 942615 NetDAQ Service Manual Y2641 19 inch Rackmount Kit Y2643 4 meter Cable Kit Instrument Connector Set 2620A 100 1 3 The 2620A 10...

Page 23: ...cusses use of the Service Manual and the various conventions used in describing the circuitry Finally a complete set of specifications is presented Chapter 2 Theory of Operation This chapter first cat...

Page 24: ...ates a button to be pressed by the user Buttons can be pressed in four ways 1 Press a single button to select a function or operation 2 Press a combination of buttons one after the other 3 Press and h...

Page 25: ...l duplex Baud rates 4800 9600 19200 38400 Data format 8 data bits no parity bit one stop bit Flow control XON XOFF Echo Off Common Mode Voltage 2640A 150V 300V on channels 1 and 11 2645A 50V dc or 30V...

Page 26: ...7g at 15 Hz 1 3g at 25 Hz 3g at 55 Hz Shock 30g half sine per Mil T 28800 Bench handling per Mil T 28800 2640A 2645A Input Output Capabilities 1 13 The following specifications include the input outpu...

Page 27: ...fication Characteristic TTL Logical Zero Trigger Out Set 0 8V maximum for an Iout of 1 0 mA 1 LSTTL load TTL Logical One Trigger Out Not Set 3 8V minimum for an Iout of 0 05 mA 1 LSTTL load Non TTL Lo...

Page 28: ...mV Input Debouncing None or 1 75 ms selectable Maximum Transition Rate 5 kHz Debounce disabled 500 Hz Debounce enabled Maximum Count 4 294 967 295 2640A 2645A Real Time Clock and Calendar 1 19 Table...

Page 29: ...o Channel Crosstalk 120 dB minimum Slow Rate e g 30V dc on channel 1 may cause a 30 V error on channel 2 100 dB minimum Medium and Fast Rates e g 1V dc on channel 1 may cause a 10 V error on channel 2...

Page 30: ...or 3 0 Maximum 2 0 for rated accuracy Crest Factor Error For nonsinusoidal input signals with crest factors between 2 and 3 and pulse widths 100 s add 0 2 to the accuracy specifications Common Mode Re...

Page 31: ...mV 7 5 mV 8 1 mV 3V 20 to 50 Hz 3 2 5 mV 6 5 mV 3 5 2 5 mV 7 5 mV 50 to 150 Hz 0 4 2 5 mV 1 5 mV 0 5 2 5 mV 1 2 5 mV 150 Hz to 10 kHz 0 3 2 5 mV 1 5 mV 0 4 2 5 mV 1 2 5 mV 10 kHz to 20 kHz 0 4 2 5 mV...

Page 32: ...60 C Range 90 Day 1 Year 1 Year Slow Fast Slow Fast Slow Fast 300 015 20 m 02 80 m 02 50 m 02 120 m 084 126 m 084 336 m 3 k 02 3 02 8 02 5 02 1 2 084 1 26 084 3 36 30 k 03 3 04 10 03 5 04 15 126 12 6...

Page 33: ...Specifications Accuracy 3 Temperature Resolution 90 Day 18 C to 28 C 1 Year 18 C to 28 C 1 Year 10 C to 60 C Slow Fast Slow Fast Slow Slow Fast 200 C 0 003 C 0 007 C 0 06 C 0 16 C 0 09 C 0 33 C 0 63 C...

Page 34: ...cation at 60 C is 1 1 then the specification at 40 C is 1 1 0 6 x 40 28 60 28 0 6 0 7875 Table 1 25 2640A Thermocouple Specifications Accuracy C Thermocouple Resolution 18 C to 28 C 10 C to 60 C 90 Da...

Page 35: ...0 0 1 0 75 1 00 1 90 1 30 2 20 C 0 to 150 0 2 0 80 0 90 1 60 1 00 1 70 150 to 650 0 1 0 65 0 75 1 40 1 00 1 50 650 to 1000 05 0 65 0 85 1 40 1 20 1 80 1000 to 1800 05 1 00 1 30 2 10 2 10 2 80 1800 to...

Page 36: ...ement function Table 1 28 2645A DC Voltage General Specifications Specification Characteristic Input Impedance 100 M in parallel with 300 pF maximum for ranges 3V 10 M in parallel with 100 pF maximum...

Page 37: ...for the ac voltage function Table 1 31 2645A AC Voltage General Specifications Specification Characteristic Input Impedance 1 M in parallel with 100 pF Maximum Crest Factor 3 0 maximum 2 0 for rated a...

Page 38: ...kHz to 50 kHz 2 3 mV 3 5 mV 3 3 mV 4 5 mV 50 kHz to 100 kHz 5 5 mV 5 1 mV 7 5 mV 8 1 mV 3V 20 to 50 Hz 3 2 5 mV 6 5 mV 3 5 2 5 mV 7 5 mV 50 to 150 Hz 0 4 2 5 mV 0 8 5 mV 0 5 2 5 mV 1 5 mV 150 Hz to 10...

Page 39: ...00 10 m 30 m 1 mA 300 mV 3 5V 3 k 100 m 300 m 100 A 300 mV 3 5V 30 k 1 3 10 A 300 mV 3 5V 300 k 10 30 10 A 3 0V 3 5V 3 M 100 300 1 A 3 0V 3 5V Table 1 36 2645A Four Wire Resistance Accuracy Specificat...

Page 40: ...t Slow Slow Fast 200 C 0 03 C 0 06 C 0 16 C 0 25 C 0 25 C 0 62 C 1 10 C 0 C 0 03 C 0 06 C 0 20 C 0 31 C 0 31 C 0 85 C 1 30 C 100 C 0 03 C 0 06 C 0 23 C 0 34 C 0 34 C 0 95 C 1 40 C 300 C 0 03 C 0 06 C...

Page 41: ...2 1 1000 to 1300 3 1 0 1 2 1 9 1 6 2 4 E 100 to 25 3 0 8 0 9 1 5 1 0 1 6 25 to 20 2 0 7 0 7 1 2 0 8 1 3 20 to 600 2 0 6 0 7 1 1 0 8 1 2 600 to 1000 2 0 6 0 8 1 2 1 1 1 5 T 100 to 0 4 1 1 1 2 2 2 1 3...

Page 42: ...1 Hz 0 05 0 1 Hz 0 05 1 Hz 9 kHz to 90 kHz 1 Hz 10 Hz 0 05 1 Hz 0 05 10 Hz 90 kHz to 900 kHz 10 Hz 100 Hz 0 05 10 Hz 0 05 100 Hz 1 MHz 100 Hz 1 kHz 0 05 100 Hz 0 05 1 kHz Table 1 42 2645A Frequency Se...

Page 43: ...ut Protection 2 9 2 13 Input Signal Conditioning 2 9 2 14 Analog to Digital a d Converter 2 9 2 15 Inguard Microcontroller 2 9 2 16 Channel Selection 2 9 2 17 Open Thermocouple Check 2 10 2 18 A4 Anal...

Page 44: ...28 2 53 Watchdog Timer and Reset Circuit 2 29 2 54 Display Controller 2 29 2 55 A3 A D Converter PCA Circuit Description 2 31 2 56 Stallion Chip 2 33 2 57 Input Protection 2 33 2 58 Input Signal Condi...

Page 45: ...2 54 2 99 Counters 2 56 2 100 Converting Counts to Volts 2 56 2 101 DISCHARGE Signal 2 57 2 102 Open Thermocouple Detector 2 57 2 103 Channel Measurements 2 57 2 104 Reading Rates 2 57 2 105 Measurem...

Page 46: ...NetDAQ Service Manual 2 4...

Page 47: ...diagrams The Interconnection Diagram Figure 2 1 illustrates the physical connections between each pca In all discussions signal names followed by a character are active asserted low All other signals...

Page 48: ...ard Crossing Flash Memory RAM and Real Time Clock RS 232 10BASE2 10BASE T Reset Circuits Address Decoding Ethernet Interface Buffer RAM Digital I O A2 Display Front Panel Switches Display Controller V...

Page 49: ...provides a power supply status signal to the Microprocessor in the Digital Kernel Within the Ethernet interface A1U16 A1U32 there is an inverter module that provides an isolated 9V dc supply for the...

Page 50: ...d Trigger Input buffers eight bidirectional Digital I O channels A1U3 A1U4 A1U17 A1U27 Master Alarm output and a Trigger Output A1U17 These circuits require power supply voltages from the Power Supply...

Page 51: ...positive and negative reference voltages are alternately applied to the integrator The references are switched in a sequence controlled by the A D Electrically Programmed Logic Device EPLD A3U18 whic...

Page 52: ...the temperature of the thermocouple input terminals The resulting dc output voltage is proportional to the block temperature and is sent to the A D Converter PCA for measurement Detailed Circuit Descr...

Page 53: ...t uses thermistor A1RT1 for overcurrent protection and diode A1CR1 for reverse input voltage protection Capacitor A1C59 is used for EMI EMC requirements Resistor A1R48 and capacitors A1C102 and A1C39...

Page 54: ...s A1Q7 and A1Q8 A1R38 may be removed to disable the inverter supply for troubleshooting purposes A1Q7 and A1Q8 are driven by the outputs of D flip flop A1U22 Resistors A1R34 and A1R28 and diodes A1CR1...

Page 55: ...current limiting circuit which prevents A1U25 from supplying more than 40 mA of load current Capacitor A1C9 enables the regulator to start up 5 6V dc Vddr The 5 6V dc Vddr source is regulated from a 6...

Page 56: ...o access locations in the Flash Memory A1U21 the Static RAM A1U20 A1U30 A1U34 and A1U35 the Real Time Clock A1U11 the FPGA A1U31 and the Ethernet Interface A1U32 All of the data bus lines and the lowe...

Page 57: ...ion interface controlled by hardware in the Microprocessor Information is communicated to the Display Controller to display user interface menus and measurement data Details of this communication are...

Page 58: ...hannel has a DMA channel that handles character reception and another that handles character transmission The use of these DMA controllers is transparent to the external operation of the Microprocesso...

Page 59: ...Hexadecimal Address Device Selected 000000 07FFFF Flash A1U21 200000 27FFFF SRAM A1U20 A1U30 A1U34 and A1U35 400000 401000 Microprocessor Internal 500000 50000F Ethernet Interface A1U32 600000 60007F...

Page 60: ...ss than Vcc The FLSH chip select A1U1 128 for this device goes low for any memory access to A1U21 The FLSH signal goes through jumper W3 which must always be installed during normal instrument operati...

Page 61: ...The Real Time Clock also has an interrupt output A1U11 3 that is used by the Microprocessor to synchronize its internal millisecond timer to the real time clock There should be 64 interrupts per secon...

Page 62: ...milliseconds before the Microprocessor is interrupted and the Keyboard Input register is read from the FPGA When the keyboard interrupt KINT A1U31 62 goes low the Keyboard Scanner stops scanning until...

Page 63: ...he LED when A1U1 80 is driven low The open collector output A1U5 6 is pulled high by A1R16 and A1CR22 This output is connected to a serial port input on the A D Microprocessor A3U5 53 The transmission...

Page 64: ...l connectors and electrically isolated interfaces between the Ethernet chip and the connectors Only one of the two connectors are used at a time Ethernet Chip and Buffer Memory The Ethernet chip A1U32...

Page 65: ...d 10BASE T uses twisted pair cable to attach instrument to some kind of hub A host computer other instruments and other equipment are connected to a 10BASE T hub using separate twisted pair cables 10B...

Page 66: ...fier A1U8 are the main components in this circuit The voltage from the divider approximately 1 4V dc is then buffered by A1U8 which sets the input threshold Capacitor A1C29 filters the divider voltage...

Page 67: ...input signal or the debounced input signal The buffered Totalizer Input signal TOTI goes into the FPGA at A1U31 12 Inside the FPGA the totalizer signal is routed to a 16 bit counter in the FPGA The co...

Page 68: ...gger output line TGOUT A1J6 3 is pulsed low for 250 to 500 microseconds at the beginning of the first measurement of each acquisition scan The pulse width is set by circuitry within the FPGA The outpu...

Page 69: ...has one less switch This arrangement allows the unused interface signals to function as strobe signals when their respective column is driven by the FPGA The FPGA cycles through six steps to scan the...

Page 70: ...cuit 2 52 The Beeper Drive circuit drives the speaker A2LS1 to provide an audible response to a button press A valid entry yields a short beep an incorrect entry yields a longer beep The circuitry con...

Page 71: ...the display receive signal DISRX and are clocked out of the Display Controller on the falling edge of DSCLK Series resistor A2R11 isolates DSCLK from A2U1 40 preventing this output from trying to driv...

Page 72: ...ch of these 26 high voltage outputs provides an active driver to the 5V dc supply and a passive 220 k Q nominal pull down to the 30V dc supply These pull down resistances are internal to the Display C...

Page 73: ...GRID ANODE TIMING 5V 30V 72 s 22 5 s 117 s 67 5 s 140 s 0V 5V 0V Figure 2 6 Grid Anode Timing Relationships A3 A D Converter PCA Circuit Description 2 55 The following paragraphs describe the operatio...

Page 74: ...urce Input Protection Signal Conditioning Selectable Gains x1 x10 x4 021 x32 168 BR4 BR3 BR2 BR1 A D Converter 3 45V dc References FPGA Microprocessor Guard Crossing Serial Bus Flash RAM Serial Digita...

Page 75: ...ioning 2 58 Each analog input is conditioned and or scaled to a dc voltage 3 volts or less for input to the buffer amplifier A3U27 A3U28 and related devices which scales the voltage to approximately 3...

Page 76: ...of A3U30 For the 30 and 300 volt range the input to Stallion A3U30 are as follows for the HI and LO signal inputs The HI signal is scaled by A3Z7 The input is applied to pin 1 of A3Z7 and a 101 1 div...

Page 77: ...mV Direct 90 mV 32 168 3V BR1 300 mV Direct 300 mV 10 00 3V BR3 750 mV Direct 750 mV 4 021 3V BR2 3V Direct 3V 1 000 3V BR4 30V Divide by 101 300 mV 10 000 3V BR3 150 300V Divide by 101 3V 1 000 3V BR...

Page 78: ...urrent Used Full Scale Input to Stallion dc volts Full Scale Output of Stallion dc volts Gain of DC Buffer Amplifier Full Scale DC Volts input to Multislope A D Buffer Range Control Signal 300 Ohm 1 m...

Page 79: ...f the Stallion chip via S41 Full scale input to Stallion is 300 mV dc Figure 2 10 shows a simplified signal path for the 3V ac range Table 2 10 Measurement Matrix for AC Volts AC Volt Range Gain of AC...

Page 80: ...olute voltage difference between the two outputs by regulating the 3 45V dc so as to produce zero collector base volts on A3Q5 If the collector voltage rises then A3Q5 needs more current which is prod...

Page 81: ...he amount of time that the reference currents are applied to the integrator The input voltage is proportional to the difference in the time required of positive and negative reference currents to null...

Page 82: ...d Next a reference of a polarity such as to keep the total number of NREF pulses so far equal to the number of PREF pulses is turned on for 1 count 1 6 s Finally the reference with a polarity determin...

Page 83: ...n Detailed Circuit Description 2 2 41 0 5V Div 0V dc 125 s Div Figure 2 12 Integrator Output Waveform for Input Near Full Scale 0 5V Div 0v dc 125 s Div Figure 2 13 Integrator Output Waveform for Inpu...

Page 84: ...espondingly the internal FPGA counter counts this time at 1 16th the value of NREF time The count ends as the final state of the comparator CMP goes low indicating that the charge has been removed fro...

Page 85: ...of about 2 7V Vth the resistance at the input is too large greater than 4 kohm to 10 kohm and open T C check is asserted by A3U32 pin 7 After a short delay the A D Microcontroller reads the signal and...

Page 86: ...es the inguard to perform some action and return one or more six byte response packets Transactions between the outguard and inguard are always initiated by the outguard The inguard never sends data a...

Page 87: ...BR1 Zero Offset if set Return BR2 Zero Offset if set Return BR3 Zero Offset if set Return BR4 Zero Offset if set Return Reference Junction Reading if set Return Reference Balance both references off...

Page 88: ...ng to the channel function and range to produce the correct volts or ohms For most ranges a full range value is returned as 3 0 For example on the 300 ohm range 3 0 represents 300 ohms For the 90 mV a...

Page 89: ...e housekeeping measurements The default state for the inguard is to measure on the fast rate assuming 60 Hz and with scheduled housekeeping measurements enabled The meaning of scheduled housekeeping m...

Page 90: ...returns a single response packet This packet is not returned until the inguard completes all indicated housekeeping measurements Response Packet Format Returns a single ACK packet Checksums 2 87 The...

Page 91: ...relays route the signal to the appropriate portion of the Signal Conditioning circuitry depending on the function being measured VAC VDC ohms etc The Signal Conditioning circuitry converts the signal...

Page 92: ...H11 20 1 1 0 K22 K24 VDC 3V CH1 10 0 0 1 K23 VDC 3V CH11 20 0 1 0 K24 4W Ohms 1 1 1 K21 K24 Table 2 13 Channel Bits Channels Enabled CH3 CH2 CH1 CH0 1 11 0 0 0 0 2 12 0 0 0 1 3 13 0 0 1 0 4 14 0 0 1 1...

Page 93: ...ame time Table 2 16 Function Relay Settling Time gives the required time for the relays to settle for a given function Table 2 15 Function Relays Function K26 K25 K27 F0 F1 F2 F3 F4 F5 VDC TC OTC S R...

Page 94: ...9 44 64 BR3 ACR4 FPWR RPCTL 2W 3 M 7 11 19 23 35 37 39 44 64 BR3 ACR4 FPWR RPCTL 4W 300 10 15 19 23 35 37 39 44 64 BR3 ACR4 FPWR RPCTL 4W 3 k 9 14 19 23 35 37 39 44 64 BR3 ACR4 FPWR RPCTL 4W 30 k 8 13...

Page 95: ...s Zero BR2 30 s Zero BR3 30 s Zero BR4 30 s Reference Balance both references on 30 s Reference Balance both references off 30 s Reference Junction 30 s A D 2 96 The multi slope A D converter in the...

Page 96: ...gnal is actually being measured by the A D is during the Integrate period Therefore the channel can be deselected and the Stallion programming for the next channel begun during the Deintegrate period...

Page 97: ...mmand C1 C0 Measure Signal 0 0 Reference Balance Reading Both References 0 1 Reference Balance Reading Neither Reference 1 0 There are two lines from the A D state machine A3U18 that indicate its stat...

Page 98: ...ng continuous readings the A3U5 A D microprocessor has only the length of the Autozero period to read the counters Converting Counts to Volts 2 100 If we assume perfect voltage references and no offse...

Page 99: ...LK is supplied by the A3U5 A D microprocessor in the form of the SCC3 baud rate generator BRG3 pin After 1 7 ms the OTC bit is read to determine the status of the channel A 1 represents an open thermo...

Page 100: ...t for signal conditioning circuitry to settle See Table2 18 Signal Conditioning Settling Time After these steps have been carried out the sequence of operations depends on the measurement function VDC...

Page 101: ...reading to be taken If any thermocouple channels are measured in a scan a reference junction measurement is taken first before any channel measurements Reference Junction 2 109 The reference junction...

Page 102: ...nal is assumed to be too low in amplitude or frequency to measure and a value of 0 Hz is returned VAC Discharge Mode 2 111 After a frequency or VAC reading the hardware is configured to discharge cert...

Page 103: ...Reading Types 2 115 There are two types of housekeeping readings reference balance and zero offset readings There are two different reference balance readings and four different zero offset readings R...

Page 104: ...Housekeeping earlier in this chapter Setting the HK bit in a configuration command causes the inguard to schedule housekeeping readings on a rotating basis taking one at the end of each channel scan I...

Page 105: ...ures greater than 2000 counts 2645A or 12000 counts 2640A This is approximately 0 175 volts A typical zero offset measurement is approximately 0 1 volts Reference Balance Test 2 124 The reference bala...

Page 106: ...NetDAQ Service Manual 2 64...

Page 107: ...A D Converter PCA 3 12 3 17 Removing the A4 Analog Input PCA 3 12 3 18 Removing Miscellaneous Chassis Components 3 12 3 19 Removing the Power Switch Input Connector 3 12 3 20 Removing the Fuseholder 3...

Page 108: ...NetDAQ Service Manual 3 2...

Page 109: ...Hz However the instrument is warranted to meet published specifications only at 50 60 Hz The instrument also operates from dc power 9 to 16V dc DC input power is connected to the rear input connector...

Page 110: ...dle boards by their nonconductive edges only Store plastic vinyl and Styrofoam objects outside the work area 2 Store and transport all static sensitive components and assemblies in static shielding ba...

Page 111: ...inch 6 32 Phillips head screws from the rear panel bezel 4 Remove the rear panel bezel and case assembly Do not touch any internal parts of the instrument 5 Locate the fuse holder at the back of the c...

Page 112: ...Manual 3 6 1 Remove all Cables 2 Remove Bottom Screws 4 places 3 Remove Rear Bezel Screws 2 places 4 Remove Rear Bezel and Case for Fuse Access Fuse 15 100 250V Time Delay Bottom Top Figure 3 1 Repla...

Page 113: ...over properly installed 1 Disconnect all rear panel cables to the instrument power Universal Input Module and I O connectors 2 Invert the instrument on a protective surface and remove the four 1 4 inc...

Page 114: ...ual 3 8 L Z B C 4 Places A P 6 Places A3 A D Converter PCA O W V 2 Places N T R A1 Main PCA M I 2 Places U Y 4 Places X 4 Places D H G E A2 Display PCA F Figure 3 2 2640A and 2645A Overall Assembly De...

Page 115: ...General Maintenance Disassembly Procedures 3 3 9 E J U K I A1 MAIN PCA Figure 3 2 2640A and 2645A Overall Assembly Details Sheet 2 of 3...

Page 116: ...NetDAQ Service Manual 3 10 U R S S T J A3 A D CONVERTER PCA Q L 3 Places Figure 3 2 2640A and 2645A Overall Assembly Details Sheet 3 of 3...

Page 117: ...window Removing the A1 Main PCA 3 14 Complete the following procedure to remove the A1 Main PCA I from the chassis 1 Complete the procedure Removing the Instrument Case to gain access to the instrume...

Page 118: ...versal Input Module 1 Remove the Universal Input Module from the instrument Open the module and disconnect all inputs to the terminal strips 2 Using a nonmetallic prying device widen the side of the m...

Page 119: ...o screws V that secure the transformer wire cover plate W and side the plate free from the chassis and remove 6 Remove the four nuts X that secure the transformer to the chassis mounting plate Assembl...

Page 120: ...elay fuse in the fuseholder PN 944629 3 Reconnect the two terminals brown wires S to the fuseholder Installing the Power Switch Input Connector 3 26 Complete the following procedure to install the pow...

Page 121: ...ribbon cable J from A1P10 through the chassis opening and reconnect it to the A3 A D Converter PCA connector A3J10 7 Gently reconnect the display ribbon cable E to the connector A1J2 8 Complete the p...

Page 122: ...dow These types of cleaners can damage surface features and markings Use an isopropyl based cleaning agent or water to clean the Front Panel and the display window Installing the Front Panel Assembly...

Page 123: ...Open Thermocouple Response Test 4 12 4 14 Two Terminal Resistance Accuracy Test 2640A 4 13 4 15 Two Terminal Resistance Accuracy Test 2645A 4 14 4 16 Four Terminal Resistance Accuracy Test 2640A 4 15...

Page 124: ...tion Procedure Semiautomatic 4 28 4 37 VDC Calibration Procedure 4 31 4 38 VAC Calibration Procedure 4 32 4 39 Resistance Calibration Procedure 4 33 4 40 Frequency Calibration Procedure 4 34 4 41 Cali...

Page 125: ...ess than 70 WARNING The 2640A 2645A instruments contain high voltages that are dangerous or fatal Only qualified personnel should attempt to service the instruments Configuring the Performance Test Se...

Page 126: ...005 1 9 k 0 005 19 k 0 005 190 k 0 005 1 9 M 0 005 Mercury Thermometer 0 02 C Resolution Princo ASTM 56C Thermocouple Probe Type T Fluke P20T Oil Water Bath Thermos bottle and cap Digital Multimeter...

Page 127: ...ON ENTER BNC T Terminator Ground Wire NetDAQ NETWORKED DATA ACQUISITION UNIT FIGURE 4 1 Performance Test Setup 12 11 13 14 15 16 17 18 19 20 2 1 3 4 5 6 7 8 9 10 SOURCE 4 WIRE SENSE 4 WIRE H L H L H L...

Page 128: ...e display lights Press the up down arrow keys until LinE Line Frequency is displayed in the primary display Press the ENTER key Press the up down arrow keys until 50 50 Hz is displayed in the primary...

Page 129: ...Connect a test lead to each DIO line 0 to 7 plus a test lead to the Totalizer input and the common GND line Reinstall the DIGITAL I O connector 10 Connect ALARM TRIGGER I O Test Leads Remove the 8 po...

Page 130: ...erify the Spy window measurement is between the minimum and maximum values Change the channel 1 range as required see Step 1 Volts DC Range 5700A Output Minimum Reading Maximum Reading 90 mV Short Cir...

Page 131: ...for the output values below and verify the Spy window measurement is between the minimum and maximum values Change the channel 1 range as required see Step 1 Volts DC Range 5700A Output Minimum Readin...

Page 132: ...mum Reading Maximum Reading 300 mV 20 mV 1 kHz 0 0197V 0 0203V 300 mV 20 mV 100kHZ 0 0185V 0 0215V 300 mV 300 mV 1 kHz 0 29885V 0 30115V 300 mV 300 mV 100 kHz 0 2845V 0 3155V 3V 3V 1 kHz 2 9885V 3 011...

Page 133: ...py command from the Utilities menu Select the analog channel under test Click OK to open the Spy window 4 Verify Reading Alternately open and short the test leads Observe the measurement for the analo...

Page 134: ...lue displayed on the mercury thermometer should equal the value in the Spy Window 0 5 C 2640A or 1 0 C 2645A plus any sensor inaccuracies 5 Close Spy Window To close the Spy window double click the up...

Page 135: ...strument 01 channel 01 from the Channel list Click OK to open the Spy window 4 Verify Accuracy Configure the Decade Resistance Source for the output values below and verify the Spy window measurement...

Page 136: ...the Utilities menu Select channel 0101 instrument 01 channel 01 from the Channel list Click OK to open the Spy window 4 Verify Accuracy Configure the Decade Resistance Source for the output values be...

Page 137: ...so use the 5700A resistance calibration output instead of the Decade Resistance Source Tables are provided for both connections Refer to Figure 4 4 for the 5700A four wire connections 2 Configure Chan...

Page 138: ...H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L H L INPUT MODULE HI HI LO LO HI SENSE V AUX CURRENT GUARD GROUND WIDEBAND 5700A NC NC OUTPUT V A H L H L 5700A UUT Sense Sense Source Sourc...

Page 139: ...7 k 300 k 190 k 189 750 k 190 250 k 3 M 1 9 M 1 89425 M 1 90575 M 5 Close Spy Window To close the Spy window double click the upper left hand corner control menu box Four Terminal Resistance Accuracy...

Page 140: ...ort Circuit Zero 0 1 0 3 k 1 9 k 1 8986 k 1 9014 k 30 k 19 k 18 986 k 19 014 k 300 k 190 k 188 90 k 191 10 3 M 1 9 M 1 8733 M 1 9267 M 5 Close Spy Window To close the Spy window double click the upper...

Page 141: ...urce as shown in Figure 4 3 2 Configure Channel 1 for RTD 4W In NetDAQ Logger for Windows configure channel 1 for RTD 4W and RTD R0 for 100 ohms 3 Open Spy Window Select the Spy command from the Utili...

Page 142: ...Utilities menu Select 01DIO Click OK to open the Spy window 2 Verify Digital I O Output for all Unset Lines The Spy window summarizes the 8 DIO binary lines as a decimal equivalent i e 255 for the pre...

Page 143: ...e instruments scanning Digital Input Test 4 23 This test checks the Digital I O lines when used as inputs 1 Connect Test Leads to DIGITAL I O Connector Remove the 10 position DIGITAL I O connector fro...

Page 144: ...the Spy window 5 Open Spy Window Select the Spy command from the Utilities menu Select 01TOTAL Click OK to open the Spy window 6 Verify Totalizer Count The current totalizer count is 1 since it count...

Page 145: ...ment scanning Master Alarm Output Test 4 27 This test checks the Master Alarm output for a logic low when a channel is in alarm 1 Connect Test Leads to ALARM TRIGGER I O Connector Remove the 8 positio...

Page 146: ...ad connection 7 Stop Scanning Click the Stop Instrument button on the Button Bar to stop instrument scanning Trigger Output Test 4 29 This test checks the Trigger Output 125 s logic low that occurs ea...

Page 147: ...nstrument front panel Do not press CAL ENABLE unless you intend to calibrate the instrument If you have entered calibration and wish to exit press CAL ENABLE until CAL is removed from the primary disp...

Page 148: ...desired baud rate for the instrument RS 232 port see below This is the only selectable RS 232 parameter The other instrument RS 232 parameters are fixed data bits 8 stops bits 1 parity none echo none...

Page 149: ...Modem Cable DB 9 Female to DB 9 Female RS 232 Port COM2 DB 25 RS 232 Port COM1 DB 9 Figure 4 5 Instrument and Host Computer Calibration Setup L H H L H L H L H L H L H L H L H L H L H L H L H L H L H...

Page 150: ...Parameter Setting Channel Configuration Unique to calibration step Reading Rate Slow Trigger Type All disabled Intervals All disabled Drift Correction Enabled External Trigger Output Disabled Temperat...

Page 151: ...5700A Calibrator Channel 1 Wires Channel 11 Wires H L H L H L H L Figure 4 7 Two Wire Calibration Connection 12 11 13 14 15 16 17 18 19 20 2 1 3 4 5 6 7 8 9 10 SOURCE 4 WIRE SENSE 4 WIRE H L H L H L H...

Page 152: ...etDAQ Logger command line which enables and displays the Instrument Calibration command under the Utilities menu a Select but do not open the NetDAQ Logger icon in the Fluke NetDAQ Logger group in Pro...

Page 153: ...ng the first Calibration Steps Volts DC dialog box below If you get an error message check the RS 232 parameter settings and cabling and make sure no other application such as terminal or internal mod...

Page 154: ...re no other application such as terminal or internal modem is using the selected COM port The error Calibration Mode not enabled means you have not pressed the CAL enable button at the instrument fron...

Page 155: ...enable button at the instrument front panel 2 Connect the 5700A Calibrator as shown in Figure 4 8 and source an output of 190 ohms Note that this must be a four wire connection Also verify the calibr...

Page 156: ...in Figure 4 7 and source an output of 3V ac at 10 kHz Click the Perform Calibration Step button There is only a single value 3 Click the Done button to exit the frequency cycle Calibration Procedure M...

Page 157: ...command from the Setting menu Enter the same RS 232 baud rate and host computer COM noted in Step 1 The other parameters are selected as shown below Click OK 5 Select the Terminal Preferences command...

Page 158: ...mmands Command Description Cal Mode Only CAL x Start calibration of a new function where x an integer from 1 to 4 For example CAL 1 for VDC calibration 1 VDC 2 VAC 3 Resistance 4 Frequency Yes CAL Ret...

Page 159: ...suring channel 1 provides the full scale reading and measuring the short on channel 2 determines the zero offset error Both readings are accomplished automatically with the CAL_STEP command Table 4 5...

Page 160: ...calibration constants for all of the VAC ranges Complete the following procedure to manually calibrate the VAC function 1 If you have not already done so complete the procedure Preparing for Calibrat...

Page 161: ..._REF 30 0000E 0 5700A Source 30V ac 1 kHz CAL_STEP 30 0000E 0 NetDAQ computes the calibration constant and returns the calibrated reading Allow several seconds CAL_REF 300 0000E 0 5700A Source 300V ac...

Page 162: ...rt This way you can send a CAL_REF command and it will return 0 W indicating that the problem was probably caused by a misapplied short on channels 2 and 12 A device dependent error is returned by the...

Page 163: ...requency calibration CAL_REF 10 0000E 3 5700A Source 3V ac 10 kHz CAL_STEP 10 0000E 3 NetDAQ computes the calibration constant and returns the calibrated reading Allow several seconds 4 Resolve any ca...

Page 164: ...NetDAQ Service Manual 4 42...

Page 165: ...Display Test 5 9 5 14 COMM Parameter Reset 5 9 5 15 Using the RS 232 Interface 5 9 5 16 Command Processing 5 10 5 17 Instrument Configuration 5 11 5 18 Command Set 5 12 5 19 Troubleshooting the Instru...

Page 166: ...nce Readings 5 32 5 34 Troubleshooting Relay Problems 5 33 5 35 A4 Analog Input PCA Troubleshooting 5 33 5 36 Troubleshooting Calibration Failures 5 34 5 37 Retrieving Calibration Constants 5 34 5 38...

Page 167: ...is technology The information offered in the following paragraphs serves only as an introduction to SMT It is not recommended that repair be attempted based only on the information presented here Refe...

Page 168: ...test of the following items FLASH ROM parameters communication parameters and calibration constants RAM Instrument and channel configuration plus RAM images of FLASH ROM parameters Ethernet Ethernet c...

Page 169: ...are discovered to be corrupt These defaults are listed in Table 5 2 Table 5 2 FLASH ROM Parameter Defaults Parameter Default Ethernet Address ff ff ff ff ff ff Calibration Constants All gains are set...

Page 170: ...ar panel RS 232 port and an ASCII terminal or PC running ASCII terminal emulation Complete the following procedure to retrieve error codes from the instrument using an RS 232 connection 1 Connect the...

Page 171: ...edure to change the status of any dio line 1 Select the dio diagnostic tool using the procedure Selecting the Diagnostic Tool Menu 2 Use the left right arrows to select the desired dio line dio7 to di...

Page 172: ...channel functions 1 Select the conF diagnostic tool using the procedure Selecting the Diagnostic Tool Menu 2 Reading Rate Use the up down arrow keys to show rAtE in the primary display then press the...

Page 173: ...mmands on the RS 232 interface since Met Cal does not have network capability and field calibration stations probably won t either The instrument also supports several commands for factory testing and...

Page 174: ...was not legal given the current state of the instrument or had an inappropriate parameter value A device dependent error occurs when an instrument specific limitation is exceeded such as input queue s...

Page 175: ...quation Off Off Channel 1 to 30 Mx B 1x 0 1x 0 Channel 1 to 30 Alarm Limits Off 0 Off 0 Channel 1 to 30 Alarm Association None None Channel 1 to 30 Alarm Trigger Disabled Disabled Reading Rate Slow Sl...

Page 176: ...entification query OPC Operation complete query RST Reset TST Self test query SELFTEST Return current selftest results CAL Start calibration procedure for indicated function CAL Return the identifier...

Page 177: ...e LM is for FPGA logic Restrictions None Notes The serial number field is always zero The instrument could store the serial number in flash and let it be set once from the RS 232 interface But if a re...

Page 178: ...le 5 8 Power on Reset Instrument State State Element Power on Reset Selftest 32 bit totalizer Cleared to 0 Cleared to 0 Digital Output Deasserted Deasserted Master Alarm Output Deasserted Deasserted T...

Page 179: ...teger which binary encodes the selftest results as shown in Table 5 1 Multiple selftest errors are indicated by the selftest codes or d together Restrictions Not allowed in calibration mode Command CA...

Page 180: ...place of default reference Parameters new calibration reference value new calibration reference value floating point reference value Response None Restrictions Calibration mode only Notes This command...

Page 181: ...ils because the measured reading is outside of the specified limits the raw measurement is returned A device dependent error is returned if an internal error such as a Guard Crossing error measurement...

Page 182: ...mV 750mV na na na na na opt Command FUNC 1 Description Query the measurement function range and number of terminals for channel one Parameters None Response function range terminals function OFF VDC V...

Page 183: ...shooting the Instrument 5 19 The following paragraphs describe an organized method of instrument troubleshooting The overall approach is to start with power up self test error codes and then proceed t...

Page 184: ...leted but the main software did not take over instrument operation Correction Reloading the main software is discussed in Updating Embedded Instrument Firmware later in this chapter Also see Troublesh...

Page 185: ...tween A1J2 and A2J1 or the power supply voltages to the A2 Display PCA Refer to paragraph A2 Display PCA Troubleshooting The A1U1 microprocessor could be damaged for the interface with the A2 Display...

Page 186: ...ee Troubleshooting the A3 A D Converter PCA 8 Inguard A D failure A3 A D Converter PCA Background The A1U1 microprocessor requests the A D portion of the inguard A3 A D Converter PCA to run a self tes...

Page 187: ...for an incorrect output indicating a device failure 11 Inguard overload detection failed A3 A D Converter PCA Background This self test is created by configuring for an ohms measurement with treeing r...

Page 188: ...ircuit should detect the open thermocouple Also check the relays in the circuit path 13 Communication parameters corrupt A1 Main PCA Background The A1U11 real time clock device has resident RAM that s...

Page 189: ...ip itself 16 Ethernet chip or RAM failure A1 Main PCA Background The Ethernet controller A1U32 has associated RAM A1U33 The addition of the 10BASE2 transceiver A1U16 completes the device complement of...

Page 190: ...ower supply down See Power Supply Troubleshooting Power Supply look for overwarm devices Dead A2 Display PCA It may appear that self test didn t begin because the display is dead and therefore didn t...

Page 191: ...rst applied to the instrument then the A1U1 microprocessor may have been damaged by static electricity If the problem seems to be in the outboard devices then probe them with a logic analyzer or oscil...

Page 192: ...oblem the fault could be caused by the A1U32 Ethernet Controller itself or its associated RAM device A1U33 One check is to measure the bias voltage at A1U32 21 at resistor A1R107 For a normally operat...

Page 193: ...oting WARNING To avoid electric shock disconnect all channel inputs from the instrument before performing any troubleshooting operations The Display Controller reads the DTEST and LTE inputs to determ...

Page 194: ...1 953 microseconds per cycle This signal depends on an E clock signal also known as DCLK of 1 024 MHz from the Main Assembly If the E clock is not correct the problem may be in the A1 Main PCA or in t...

Page 195: ...gits However you may encounter other random irregularities across different areas of the display under the following circumstances After prolonged periods of displaying the same information If the dis...

Page 196: ...rmed by A3U1 and A3U3 and related components The result line at A3U1 7 IG RESET Inguard Reset At power up IG RESET should stay low for about 250 ms and then go high for normal operation If IG RESET fa...

Page 197: ...10 and 11 to 20 then it may be a bus problem bank1 and bank2 If the banks are interacting the treeing relays A3K21 to A3K24 may be at fault You may find it easier to measure relay conditions by remov...

Page 198: ...f it was improperly entered The calibration step may be repeated by sending the CAL_STEP command to the instrument again Calibration of the instrument utilizes a simple calibration by function approac...

Page 199: ...ffset 0 00750E 0 0 00750E 0 24 VAC 300 mV Gain 0 90000E 0 1 10000E 0 26 VAC 300 mV Offset 0 00300E 0 0 00300E 0 28 VAC 3V Gain 0 90000E 0 1 10000E 0 30 VAC 3V Offset 0 03000E 0 0 03000E 0 32 VAC 30V G...

Page 200: ...lash Memory and custom cables for making the connections This is not a closed case procedure and it is necessary to open the instrument to load the A D Firmware The A D Firmware is different for each...

Page 201: ...Fname Switch specifies the firmware file to load where name is the file name H Switch to disable the CTS RTS handshake required to load the A D Firmware Mn Switch to force detection of a particular mo...

Page 202: ...al minutes for the firmware loading process to complete The PC screen will show Loading Line as the firmware is loaded Do not interrupt this process by touching the PC keyboard or removing power from...

Page 203: ...17 Connector D SUB 9 Pin RS 232 Cable Model RS40 PN 851712 A D RS 232 Extender Cable NetDAQ A D P1 1 2 3 P1 1 2 3 DB 25S 2 3 7 DB 9P 2 3 7 2 3 5 DB 9S 2 3 5 PC 9 Pin RX TX Signal Ground PN 845339 Sock...

Page 204: ...0 Allow several minutes for the firmware loading process to complete The PC screen will show Loading Line as the firmware is loaded Do not interrupt this process by touching the PC keyboard or removin...

Page 205: ...6 1 Chapter 6 List of Replaceable Parts Title Page 6 1 Introduction 6 3 6 2 How To Obtain Parts 6 3 6 3 Manual Status Information 6 3 6 4 Newer Instruments 6 4 6 5 Service Centers 6 4...

Page 206: ...NetDAQ Service Manual 6 2...

Page 207: ...rized representatives by using the part number under the heading FLUKE STOCK NO In the U S order directly from the Fluke Parts Dept by calling 1 800 526 4731 Parts price information is available from...

Page 208: ...this chapter NOTE This instrument may contain a Nickel Cadmium battery Do not mix with the solid waste stream Spent batteries should be disposed of by a qualified recycler or hazardous materials handl...

Page 209: ...MP18 OUTER CASE 938121 1 MP19 WIRE ASSY GROUND 874099 1 MP22 PWR PLUG PANEL 10A 250V 3 WIRE SWITCH 928627 1 MP25 DECAL ISOTHERMAL CASE 874131 1 MP27 CABLE ASSY FLAT 20 COND MMOD FERRITE 876185 1 MP35...

Page 210: ...Places H70 4 Places A2 H52 6 Places MP990 MP48 MP12 MP15 MP11 MP111 MP4 MP27 MP71 MP399 MP99 MP46 MP5 MP1 H51 MP13 MP101 MP35 MP18 MP22 4 Places H53 VXWORKS LABEL MP101 MP97 2640A 2645A T B Sheet 1 of...

Page 211: ...List of Replaceable Parts Parts Lists 6 6 7 MP27 From A1 Main PCA P10 H52 2 Places A1 2640A 2645A T B Sheet 2 of 4 Figure 6 1 2640A 2645A Final Assembly cont...

Page 212: ...l 6 8 White Part of MP71 N tab of MP22 H52 Black Part of MP71 MP46 MP99 MP98 From L tab of MP22 MP19 tab of MP22 H52 MP71 From A1 Main PCA Assy P10 2640A 2645A T B Sheet 3 of 4 Figure 6 1 2640A 2645A...

Page 213: ...List of Replaceable Parts Parts Lists 6 6 9 Red 2 from A1 Main PCA Assy P10 2640A 2645A T B Sheet 4 of 4 Figure 6 1 2640A 2645A Final Assembly cont...

Page 214: ...00PF 20 3000V Z5U 832709 2 C26 CAP AL 47UF 20 100V SOLV PROOF 837492 1 C27 37 CAP CER 0 01UF 10 50V X7R 1206 747261 2 C39 102 CAP CER 0 047UF 10 100V X7R 844733 2 C43 52 54 CAP CER 180PF 10 50V C0G 12...

Page 215: ...40506 9 R34 49 58 740506 R121 122 136 740506 R9 12 46 RES CERM 4 02K 1 125W 100PPM 1206 783266 5 R129 131 783266 R10 44 RES CERM 1 30K 1 125W 100PPM 1206 780999 2 R11 132 RES CERM 1 21K 1 125W 100PPM...

Page 216: ...2569 2 U5 7 ISOLATOR OPTO HI SPEED LED TO GATE 504522 2 U6 24 IC VOLT REG ADJ POS LO DROPOUT TO 220 943931 2 U8 28 IC OP AMP DUAL LOW POWER SOIC 867932 2 U9 IC V REG SWITCHING 100KHZ 5A TO 220 929591...

Page 217: ...Notes VR3 ZENER UNCOMP 6 8V 5 20MA 0 2W SOT 23 837195 1 W2 3 HEADER 1 ROW 100CTR 2 PIN 643916 2 WP1 2 DC POWER WIRE 938139 2 Y1 CRYSTAL 15 36MHZ 50PPM SURFACE MT 943167 1 Y2 CRYSTAL 20 00MHZ 30PPM HC...

Page 218: ...NetDAQ Service Manual 6 14 2645A 1601 Figure 6 2 A1 Main PCA Assembly...

Page 219: ...ROW 050CTR 20 PIN 831529 1 LS1 AF TRANSD PIEZO 22 MM 602490 1 MP321 WIRE JUMPER TEF 22AWG WHT 300 528257 1 R1 10 12 RES CERM 10K 5 125W 200PPM 1206 746610 3 R2 RES CERM 2 2M 5 125W 200PPM 1206 811778...

Page 220: ...NetDAQ Service Manual 6 16 2620A 1601 Figure 6 3 A2 Display PCA Assembly...

Page 221: ...05 514216 1 C79 CAP CER 0 047UF 20 50V X7R 1206 782615 1 C80 CAP POLYES 0 1UF 10 1000V 837518 1 C82 CAP CER 2500PF 20 250V X7R 485680 1 C83 84 CAP CER 15PF 10 50V C0G 1206 837393 2 C85 CAP CER 68PF 2...

Page 222: ...876011 R7 14 17 RES CERM 47 5 0625W 200PPM 0603 927707 34 R19 24 37 927707 R43 59 109 927707 R115 118 153 927707 R166 168 927707 R15 102 104 RES CERM 100K 1 125W 100PPM 1206 769802 7 R126 134 139 7698...

Page 223: ...OCOL MPU 16 MHZ QFP 910831 1 U6 PROGRAMMED FLASH PFE 949685 1 U7 10 IC CMOS OCTAL D F F EDG TRG SOIC 838029 2 U8 IC VOLT REG 5 V LO DO IQ 500MA SOT223 929641 1 U9 34 IC CMOS QUAD 2 INPUT OR GATE SOIC...

Page 224: ...PCA Assembly cont Reference Designator Description Fluke Stock No Tot Qty Notes Z6 RNET CERM SIP 2620 HI V AMP GAIN 847363 1 Z7 RNET MF FRIT SIP HI V DIVIDER 926733 1 Z8 RNET MF POLY SIP 2280 LO V DIV...

Page 225: ...List of Replaceable Parts Parts Lists 6 6 21 2640A 1603 Figure 6 4 2640A A3 A D Converter PCA Assembly...

Page 226: ...2 C76 CAP CER 4 3PF 0 5PF 50V C0G 0805 514216 1 C79 CAP CER 0 047UF 20 50V X7R 1206 782615 1 C80 CAP POLYES 0 1UF 10 1000V 837518 1 C82 CAP CER 2500PF 20 250V X7R 485680 1 C83 84 CAP CER 15PF 10 50V C...

Page 227: ...K 1 125W 100PPM 1206 769802 6 R126 134 769802 R16 108 136 RES CERM 30 1K 1 125W 100PPM 1206 801258 4 R137 801258 R21 RES CERM 1 5K 1 125W 100PPM 1206 810630 1 R22 62 106 RES CERM 10 1 125W 100PPM 1206...

Page 228: ...223 92964 1 U9 34 IC CMOS QUAD 2 INPUT OR GATE SOIC 838276 2 U11 IC COMPARATOR HI SPEED PRECISION 822197 1 U12 27 31 IC OP AMP DUAL PICOAMP IB SO8 910836 3 U13 IC ARRAY 7 NPN DARLINGTON PAIRS SOIC 821...

Page 229: ...Parts Lists 6 6 25 Table 6 5 2645A A3 A D Converter PCA Assembly cont Reference Designator Description Fluke Stock No Tot Qty Notes Z8 RNET MF POLY SIP 2280 LO V DIVIDER 611186 1 1 FUSIBLE RESISTOR U...

Page 230: ...NetDAQ Service Manual 6 26 2645A 1603 Figure 6 5 2645A A3 A D Converter PCA Assembly...

Page 231: ...14458 2 MP2 ISOTHERMAL CASE BOTTOM 874107 1 MP3 ISOTHERMAL CASE TOP 874110 1 MP25 DECAL ISOTHERMAL CASE 874131 1 P1 CONN DIN41612 TYPE R RT ANG 48 SCKT 867338 1 P2 CONN MICRO RIBBON REC RT ANG 20 POS...

Page 232: ...NetDAQ Service Manual 6 28 L H L H H L H L H L H L H L H L H L H L L H L H H L H L H L H L H L H L H L H L 2620A 1604 Figure 6 6 A4 Analog Input PCA Assembly...

Page 233: ...Schematic Diagrams Title Page 7 1 Introduction 7 3 7 2 A2 Display PCA Assembly 7 10 7 3 2640A A3 A D Converter PCA Assembly 7 12 7 4 2645A A3 A D Converter PCA Assembly 7 19 7 5 A4 Analog Input PCA A...

Page 234: ...NetDAQ Service Manual 7 2...

Page 235: ...2 23 24 25 VBB 14 24 VCC 14 14 2 1 19 31 32 52 53 62 81 116 121 16 16 28 27 41 55 79 91 3 VCC1 18 28 39 62 83 99 112 131 VCC15 14 VCC20 32 VCC29 20 VCC30 32 VCC34 32 VCC35 32 VCC21 23 Reference Design...

Page 236: ...5 Q7 SMD25N05 R38 0 02 47 C30 47 C31 2200 C14 FLUKE45 6401 T2 CR12 BAS16 D HC74 CL Q Q PR R47 10K 1000PF C35 U18 LM79L05A GND OUT IN HCU04 HCU04 HCU04 HCU04 CR11 BAS16 R28 470 R34 470 R40 5 1K MMBD700...

Page 237: ...C04M CD74AC04M 10 C101 W4 VCC VCC1 U13 R R43 10K TP11 R125 0 02 R126 0 02 15 36 MHZ Y1 VCC W1 W5 R134 10K R135 10K VCC L7 5UH R143 47 R138 47 R139 47 R140 47 R141 47 R142 47 VCC L6 5UH L8 5UH VCC VCC1...

Page 238: ...6T RXI TXO CDS RR RR HBE CD CD RX RX TX TX U16 NE83Q92A 9V T3 T3 PE 65728T T3 1 1 2 1 T4 PE 65746 RV2 910V R136 470 1000PF C10 L5 5UH C28 001 BAW56 CR4 10K R137 VCC ETHERNET INTERFACE 10BASE2 10BASE T...

Page 239: ...DETECTION POWER FAIL PRODUCTIONASSEMBLIES NOTE S1 IS NOT INSTALLED IN CS CS CS CS U11 AND U36 ARE BIASED BY VBB NOTE VCC35 U35 25V VCC34 25V U34 VCC20 25V U20 VCC30 U30 25V RD2 RAM2 WRL 18 17 19 16 15...

Page 240: ...140 CR16 LX CC VOUT SW_GND V SHDN VREF SS GND U12 MAX732CWE VCC 47 C11 L3 1 C79 1 C82 1 C87 1 C95 10K R124 BAS16 CR20 VCC VCC VCC VCC L13 5UH VCC W3 FPGA KEYBOARD I F FLASH PROGRAMMING POWER SUPPLY FL...

Page 241: ...R36 ULN2004 U17 ULN2004 U17 ULN2004 U17 ULN2004 U17 ULN2004 U17 ULN2004 U17 ULN2004 U27 ULN2004 U27 ULN2004 U27 ULN2004 U27 ULN2004 U27 ULN2004 U27 ULN2004 U17 ULN2004 U27 LM358DT U8 Q10 2N7002 TRIGGE...

Page 242: ...2640A 2645A Service Manual 7 10 Figure 7 2 A2 Display PCA Assembly 2620A 1602...

Page 243: ...Schematic Diagrams 7 7 11 Figure 7 2 A2 Display PCA Assembly cont 2620A 1002...

Page 244: ...2640A 2645A Service Manual 7 12 2640A 1603 Figure 7 3 2640A A3 A D Converter PCA Assembly 2640A 1603...

Page 245: ...C FC2 FC1 FC0 IOUT2 CS0 CS1 CS2 CS3 IOUT1 RMC WDOG PB7 U4 MC145406DW R 10K R50 10K R49 VCC 10K R51 10K R52 10K R53 10K R55 10K R54 27PF C27 R58 698K 10K R40 10K R38 10K R39 VCC 10K R41 HCU04 1 ALLRESI...

Page 246: ...L48 5U L49 5U L41 5U L42 5U 0 1 C94 HCU04 0 1 C95 0 1 C96 VCC R184 10 0 1 C40 HC273 CL D D D D D D D 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Q Q Q Q Q Q Q Q D HC273 CL D D D D D D D 7 6 5 4 3 2 1 0 7 6 5 4 3...

Page 247: ...55A S54B S53 F_AMP MRST HRESET RESET 189PF C1 VDD SCK RCV BRS HRESET CS SND STALLION S51 S52 S61B S58B S63 S38 4 95K Z2 R145 10K Q33 MMBT3906 R146 270 NBC SB90041 Q24 SB90041 Q9 R147 1 07K A R155 510...

Page 248: ...2640A 4501 Q5 R63 SEL2 R64 SEL1 R100 4 02K R68 200 A R69 2K 0 1 C34 R84 200 A 0 1 C49 U12 AD706 SST175 Q3 0 01 C48 A R67 7 5K 0 001 C35 R65 1 07K R66 200 0 1 C47 A A A Q2 SST109 0 1 C36 A R73 200 R96...

Page 249: ...ENSE SHLD CH24 1U 1U CH1 CH11 CH2 CH1 CH12 CH3 CH13 CH4 CH14 CH5 CH15 CH6 CH16 CH7 CH17 CH8 CH18 CH9 CH19 CH10 CH20 CH1 HI CH1A CH11A CH2A CH12A CH3A CH13A CH4A CH14A CH5A CH15A CH6A CH16A CH7A CH17A...

Page 250: ...6 16 5 15 4 14 3 13 2 12 1 11 ENABLED CHANNELS 0 0 0 0 0 0 CH3 1 1 0 0 0 CH1 CH2 0 0 1 1 0 0 0 1 0 1 0 1 0 CH0 0 7 17 0 1 1 NONE NONE NONE NONE NONE NONE 10 20 9 19 8 18 1 1 1 1 1 1 1 1 0 1 1 0 0 0 0...

Page 251: ...Schematic Diagrams 7 7 19 2645A 1603 Figure 7 4 2645A A3 A D Converter PCA Assembly 2645A 1603...

Page 252: ...C2 FC1 FC0 IOUT2 CS0 CS1 CS2 CS3 IOUT1 RMC WDOG PB7 U4 MC145406DW R 10K R50 10K R49 VCC 10K R51 10K R52 10K R53 10K R55 10K R54 27PF C27 R58 698K 10K R40 10K R38 10K R39 VCC 10K R41 HCU04 TO MAIN PWB...

Page 253: ...C17 0 1 C9 VCC 0 1 C95 0 1 C94 0 1 C97 R149 10 0 1 C96 VCC R150 10 0 1 C38 HC273 CL D D D D D D D 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 Q Q Q Q Q Q Q Q D HC273 CL D D D D D D D 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1...

Page 254: ...A S55A S54B S53 F_AMP MRST HRESET RESET 189PF C1 VDD SCK RCV BRS HRESET CS SND STALLION S51 S52 S61B S58B S63 S38 4 95K Z2 R145 10K Q33 MMBT3906 R146 270 NBC SB90041 Q24 SB90041 Q9 R147 1 07K A R155 5...

Page 255: ...0 1 C62 0 1 C61 R142 47K A 2640A 4501 Q5 R63 SEL2 R64 SEL1 R100 4 02K R68 200 A R69 2K 0 1 C34 R84 200 A 0 1 C49 U12 AD706 SST175 Q3 0 01 C48 A R67 7 5K 0 001 C35 R65 1 07K R66 200 0 1 C47 A A A Q2 S...

Page 256: ...L40 5U L5 5U L23 5U L3 5U L22 5U L2 5U L21 5U L1 5U L20 5U CH20 LO CH20 HI CH10LO CH10HI CH19LO CH19HI CH9 LO CH9 HI CH18LO CH18HI CH8 LO CH8 HI CH17LO CH17HI CH7 LO CH7 HI CH16LO CH16HI CH6 LO CH6 HI...

Page 257: ...1 0 0 0 1 0 1 0 1 0 CH0 0 7 17 0 1 1 NONE NONE NONE NONE NONE NONE 10 20 9 19 8 18 1 1 1 1 1 1 1 1 0 1 1 0 0 0 0 1 0 0 1 1 1 1 0 1 0 1 1 1 0 1 0 0 1 1 0 1 FROM SHEET 2 FROM SHEET 2 FROM SHEET 2 FROM S...

Page 258: ...2640A 2645A Service Manual 7 26 Figure 7 5 A4 Analog Input PCA Assembly 2620A 1604...

Page 259: ...11 12 13 14 15 5 7 9 3 5 7 9 11 13 15 1 2 4 6 8 10 12 14 1 2 RGRD CB2 CB1 CH20_LO CH20_LO CH20_HI CH20_HI CH19_LO CH19_LO CH19_HI CH19_HI CH18_LO CH18_LO CH18_HI CH18_HI CH17_LO CH17_LO CH17_HI CH17_H...

Page 260: ...2640A 2645A Service Manual 7 28...

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