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Theory of Operation

Detailed Circuit Description

2-35

Table 2-8. Measurement Matrix for DC Volts

DC Volt

Range

Input to
Stallion

Full-Scale

Output of

Stallion

Gain of DC

Buffer Amplifier

Full-Scale DC
Volts Input to

Multislope A/D

Buffer Range

Control Signal

90 mV

Direct

90 mV

32.168

BR1

300 mV

Direct

300 mV

10.00

BR3

750 mV

Direct

750 mV

4.021

BR2

Direct

1.000

BR4

30V

Divide by 101

300 mV

10.000

BR3

150/300V

Divide by 101

1.000

BR4

CHANNEL 1
INPUT HI

CHANNEL 1
INPUT LO

K23

R110

1K
Fusible

10M

S13

S24

S64

S44

U27

U28

U27

AD HI

AD LO

S37

S33

R119

K27 (Reset)

100K

K23

L52

K27 (Reset)

Figure 2-8. DC Volts 300V Range Simplified Schematic

Содержание NetDAQ 2640A

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 14: ...NetDAQ Service Manual x...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

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

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