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Agilent Technologies 34970A Service Manual Download Page 139

Each analog-to-digital conversion begins when the multimeter is

triggered. The ADC starts by clearing the integrator slope count in

A1U209. At the end of the integration period, the slope count is

latched. The slope count provides the most significant bits of the

input voltage conversion. The least significant bits are converted by

the on-chip ADC of CPU A1U205.

The instrument precision voltage reference is U403. Resistor R409

provides a stable bias current for the reference zener diode. R408 

and CR404 provide a bias to assure that the reference zener biases to

+7 V during power up. IC U400A amplifies the voltage reference to

+10 V while amplifier U401A inverts the +10 V reference to –10 V. 

The reference voltages force precision slope currents for the

integrating ADC through U102E–R17, R18. 

 

 5

Chapter 5  Theory of Operation

Internal DMM  

137

Summary of Contents for 34970A

Page 1: ...Agilent 34970A Data Acquisition Switch Unit Service Guide ...

Page 2: ...ent will control Technologies Licenses The hardware and or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of such license Restricted Rights Legend If software is for use in the performance of a U S Government prime contract or subcontract Software is delivered and licensed as Commercial computer soft ware as defined in ...

Page 3: ...basis Intuitive user interface with knob for quick channel selection menu navigation and data entry from the front panel Portable ruggedized case with non skid feet BenchLink Data Logger 3 Software for Microsoft Windows included Flexible Data Acquisition Switching Features 61 2 digit multimeter accuracy stability and noise rejection Up to 60 channels per instrument 120 single ended channels Readin...

Page 4: ...Alarm Output Configuration Menu 6 Scan to Scan Interval Menu 7 Scan List Single Step Read Key 8 Advanced Measurement Utility Menus 9 Low Level Module Control Keys 10 Single Channel Monitor On Off Key 11 View Scanned Data Alarms Errors Menu 12 Shift Local Key 13 Knob 14 Navigation Arrow Keys Denotes a menu key See the next page for details on menu operation 2 ...

Page 5: ...e same menu key again to move to the next item of the menu Typically this is where you choose parameter values for the selected operation 3 Rotate the knob to view the choices on this level of the menu When you reach the end of the list rotate the knob in the opposite direction to view all of the other choices The current selection is highlighted for emphasis All other choices are dimmed 1 Press t...

Page 6: ...face Hardware or remote interface errors are detected Press to read errors Instrument is configured for an external scan interval Scan Once mode is enabled Press to initiate and hold key to disable Reading memory overflow new readings will overwrite the oldest readings Viewed data is the last reading stored during most recent scan Viewed data is the minimum reading stored during most recent scan V...

Page 7: ... Ext Trig Input Alarm Outputs Channel Advance Input Channel Closed Output for pinouts see chapter 4 in User s Guide 3 RS 232 Interface Connector 4 Power Line Fuse Holder Assembly 5 Power Line Voltage Setting 6 Chassis Ground 7 GPIB IEEE 488 Interface Connector Use the Menu to Select the GPIB or RS 232 interface see chapter 2 in User s Guide Set the GPIB address see chapter 2 in User s Guide Set th...

Page 8: ...th the internal multimeter external shunt resistors are not required You can close multiple channels on this module only if you have not configured any channels to be part of the scan list Otherwise all channels on the module are break before make 34902A 16 Channel Reed Multiplexer 16 channels of 300 V switching Built in thermocouple reference junction Switching speed of up to 250 channels per sec...

Page 9: ...wo wire crosspoints Any combination of inputs and outputs can be connected at a time 300 V 1 A switching Use this module to connect multiple instruments to multiple points on your device under test at the same time You can connect rows and columns between multiple modules to build larger matrices such as 8x8 and 4x16 with up to 96 crosspoints in a single mainframe 34905 6A Dual 4 Channel RF Multip...

Page 10: ...r flexibility you can read digital inputs and the count on the totalizer during a scan 34908A 40 Channel Single Ended Multiplexer 40 channels of 300 V single ended common LO switching Built in thermocouple isothermal reference junction Switching speed of up to 60 channels per second Connects to the internal multimeter Use this module for high density switching applications which require single wir...

Page 11: ... related to the operation the instrument Service Chapter 6 provides guidelines for returning your instrument to Agilent Technologies for servicing or for servicing it yourself Replaceable Parts Chapter 7 contains detailed parts lists for the mainframe and plug in modules Schematics Chapter 8 contains the instrument s block diagram schematics disassembly drawings and component locator drawings If y...

Page 12: ...ick Start To Prepare the Instrument for Use 35 To Connect Wiring to a Module 36 To Set the Time and Date 38 To Configure a Measurement Channel 39 To Monitor a Single Channel 40 To Close a Channel 41 If the Instrument Does Not Turn On 42 To Adjust the Carrying Handle 44 To Rack Mount the Instrument 45 Chapter 3 Front Panel Overview Front Panel Menu Reference 49 To Unsecure for Calibration 51 To Sec...

Page 13: ...cation 77 Optional AC Performance Verification Tests 80 Internal DMM Adjustments 81 Zero Adjustment 81 Gain Adjustment 82 10 Vdc Adjustment Procedure Optional 85 Plug in Module Test Considerations 87 Relay Verification 88 Relay Cycle Count 88 34901A Relay Contact Resistance Verification Optional 89 34902A Relay Contact Resistance Verification Optional 96 34903A Relay Contact Resistance Verificatio...

Page 14: ... 34902A 144 34903A 146 34904A 147 34905A 34906A 148 34908A 149 Multifunction Module 151 Multifunction Control 151 Totalizer 153 Analog Output 154 Digital I O 155 Chapter 6 Service Operating Checklist 159 Is the instrument inoperative 159 Does the instrument fail self test 159 Is the Current measurement function inoperative 159 Types of Service Available 160 Standard Repair Service worldwide 160 Ex...

Page 15: ...ly 176 Front Panel Chassis Disassembly 177 Additional Disassembly 178 Plug in Module Disassembly 179 Chapter 7 Replaceable Parts Replaceable Parts 182 To Order Replaceable Parts 182 34970A Mainframe 183 34970 66501 Main PC Assembly A1 184 34970 66502 Front Panel and Keyboard PC Assembly A2 189 34970 66503 Backplane PC Assembly A3 190 34970 66504 Internal DMM PC Assembly A4 191 34901A 20 Channel Mu...

Page 16: ...t 1 of 4 245 34902A 16 Channel Multiplexer Schematic Sheet 2 of 4 246 34902A 16 Channel Multiplexer Schematic Sheet 3 of 4 247 34902A 16 Channel Multiplexer Schematic Sheet 4 of 4 248 34903A 20 Channel Actuator Component Locator 249 34903A 20 Channel Actuator Schematic Sheet 1 of 3 250 34903A 20 Channel Actuator Schematic Sheet 2 of 3 251 34903A 20 Channel Actuator Schematic Sheet 3 of 3 252 34904...

Page 17: ...tes and System Characteristics on page 20 Module Specifications 34901A 34902A 34908A 34903A 34904A on page 21 34905A 34906A on page 22 Typical AC Performance Graphs on page 23 34907A on page 24 BenchLink Data Logger Software Specifications on page 24 Product and Module Dimensions on page 25 To Calculate Total Measurement Error on page 26 Interpreting Multimeter Specifications on page 28 Configurin...

Page 18: ...34901A Only 10 00000 mA 100 0000 mA 1 000000 A 0 1 V burden 0 6 V 2 V 0 005 0 010 0 010 0 004 0 050 0 006 0 030 0 020 0 030 0 005 0 080 0 010 0 050 0 020 0 050 0 005 0 100 0 010 0 002 0 0020 0 002 0 0005 0 005 0 0010 Temperature Type Best Range Accuracy 5 Extended Range Accuracy 5 Thermocouple 6 B E J K N R S T 1100 C to 1820 C 150 C to 1000 C 150 C to 1200 C 100 C to 1200 C 100 C to 1300 C 300 C ...

Page 19: ...1 PLC 140 dB Normal Mode Rejection 3 110 dB 4 105 dB 4 100 dB 4 95 dB 4 90 dB 60 dB 0 dB DC Operating Characteristics 5 Function DCV DCI and Resistance Digits 6 61 2 61 2 51 2 51 2 41 2 Readings s 0 6 0 5 6 5 60 50 300 600 Additional Noise Error 0 of range 0 of range 0 001 of range 0 001 of range 7 0 01 of range 7 Single Channel Measurement Rates 8 Function DCV 2 Wire Ohms Thermocouple RTD Thermis...

Page 20: ...t 34901A Only 10 00000 mA 4 and 1 000000 A 4 3 Hz 5 Hz 5 Hz 10 Hz 10 Hz 5 kHz 1 00 0 04 0 30 0 04 0 10 0 04 1 00 0 04 0 30 0 04 0 10 0 04 1 00 0 04 0 30 0 04 0 10 0 04 0 100 0 006 0 035 0 006 0 015 0 006 100 0000 mA 7 3 Hz 5 Hz 5 Hz 10 Hz 10 Hz 5 kHz 1 00 0 5 0 30 0 5 0 10 0 5 1 00 0 5 0 30 0 5 0 10 0 5 1 00 0 5 0 30 0 5 0 10 0 5 0 100 0 06 0 035 0 06 0 015 0 06 Additional Low Frequency Error for ...

Page 21: ...easurement Considerations Frequency and Period All frequency counters are susceptible to error when measuring low voltage low frequency signals Shielding inputs from external noise pickup is critical for minimizing measurement errors AC Operating Characteristics 4 Function ACV ACI Digits 5 61 2 61 2 61 2 61 2 6 1 2 Readings s 7 sec reading 1 8 6 10 100 7 AC Filter Slow 3 Hz Medium 20 Hz Fast 200 H...

Page 22: ...Scan Interval Channel Delay External Trig Delay External Trig Jitter 1 to 50 000 or continuous 0 to 99 hours 1 ms step size 0 to 60 seconds channel 1 ms step size 300 µs With Monitor On 200 ms 2 ms Alarms Alarm Outputs Latency 4 TTL compatible Selectable TTL logic HI or LO on Fail 5 ms typical Memory Readings Time Stamp Resolution Relative Absolute States Alarm Queue Battery Backed 4 year typical ...

Page 23: ... 3 10 MHz 45 45 18 4 45 33 Capacitance HI to LO 50 pF 50 pF 50 pF 10 pF 50 pF Capacitance LO to Earth 80 pF 80 pF 80 pF 80 pF 80 pF Volt Hertz Limit 108 108 108 108 108 Other T C Cold Junction Accuracy 2 5 typical 0 8 C 0 8 C 0 8 C 7 Switch Life No Load typical 100M 100M 100M 100M 100M Switch Life Rated Load typical 6 100k 100k 100k 100k 100k Temperature Operating All Modules 0 C to 55 C Temperatu...

Page 24: ...mperature Storage 20 C to 70 C Humidity non condensing 40 C 80 R H AC Characteristics 34905A 34906A Bandwidth 3 2 GHz 2 GHz Insertion Loss dB 10 MHz 0 1 0 1 100 MHz 0 4 0 4 500 MHz 0 6 0 5 1 GHz 1 0 1 0 1 5 GHz 1 2 1 5 2 GHz 3 0 2 0 SWR 10 MHz 1 02 1 02 100 MHz 1 05 1 05 500 MHz 1 20 1 25 1 GHz 1 20 1 40 1 5 GHz 1 30 1 40 2 GHz 1 40 2 00 Ch Ch Cross Talk dB 4 10 MHz 100 85 100 MHz 85 75 500 MHz 65...

Page 25: ...rmance Graphs 34905A 34906A Insertion Loss 50Ω Insertion Loss 75Ω VSWR 75Ω Crosstalk 50Ω Crosstalk 75Ω Direct to Module Using provided adapter cables VSWR 50Ω 1 Chapter 1 Specifications Typical AC Performance Graphs 23 ...

Page 26: ...r 5 C Temp Coefficient 12V non isolated earth referenced 1 mV 10 mA max 1 1 ms to 0 01 of output of output mV 0 25 20 mV 0 015 1 mV C 1 Limited to 40 mA total for all three slots six DAC channels BenchLink Data Logger not included with Option 001 System Requirements 1 PC Hardware Operating System Computer Interfaces 2 GPIB LAN to GPIB RS 232 Serial Port Performance 3 Scan and Save to Disk 486 66 M...

Page 27: ...roduct and Module Dimensions 91 9 315 6 Module TOP All dimensions are shown in millimeters 103 6 mm 254 4 mm 374 0 mm 348 3 mm 212 6 mm 88 5 mm 1 Chapter 1 Specifications Product and Module Dimensions 25 ...

Page 28: ...s on the specification pages If you are operating the internal DMM outside the 23 C 5 C temperature range specified apply an additional temperature coefficient error For dc voltage dc current and resistance measurements you may need to apply an additional reading speed error For ac voltage and ac current measurements you may need to apply an additional low frequency error or crest factor error Und...

Page 29: ...nt error add the reading error and range error You can then convert the total measurement error to a percent of input error or a ppm part per million of input error as shown below of input error Total Measurement Error Input Signal Level 100 ppm of input error Total Measurement Error Input Signal Level 1 000 000 Example Computing Total Measurement Error Assume that a 5 Vdc signal is input to the D...

Page 30: ...s to a 61 2 digit measurement with 20 overrange capability Sensitivity Sensitivity is the minimum level that the multimeter can detect for a given measurement Sensitivity defines the ability of the multimeter to respond to small changes in the input level For example suppose you are monitoring a 1 mVdc signal and you want to adjust the level to within 1 µV To be able to respond to an adjustment th...

Page 31: ...uch as the U S National Institute of Standards and Technology To be meaningful the accuracy specifications must be accompanied with the conditions under which they are valid These conditions should include temperature humidity and time There is no standard convention among multimeter manufacturers for the confidence limits at which specifications are set The table below shows the probability of no...

Page 32: ...valid for a 23 C 5 C temperature range These specifications include the initial calibration errors plus the internal DMM s long term drift errors Temperature Coefficients Accuracy is usually specified for a 23 C 5 C temperature range This is a common temperature range for many operating environments You must add additional temperature coefficient errors to the accuracy specification if you are ope...

Page 33: ...digits you can use the 6 digits slow mode for further noise reduction Set the input resistance to greater than 10 GΩ for the 100 mV 1 V and 10 V ranges for the best dc voltage accuracy Use 4 wire ohms and enable offset compensation for the best resistance accuracy AC Voltage and AC Current Measurements Set the resolution to 6 digits Select the slow ac filter 3 Hz to 300 kHz Frequency and Period Me...

Page 34: ...32 ...

Page 35: ...2 Quick Start 2 ...

Page 36: ...ction press the SHIFT annunciator will turn on Then press the key that has the desired label below it For example to select the Utility Menu press If you accidentally press just press it again to turn off the SHIFT annunciator This chapter is divided into the following sections To Prepare the Instrument for Use on page 35 To Connect Wiring to a Module on page 36 To Set the Time and Date on page 38...

Page 37: ...ent The front panel display will light up briefly while the instrument performs its power on self test The GPIB address is displayed The instrument initially powers up with all measurement channels turned off To review the power on display with all annunciators turned on hold down as you turn on the instrument If the instrument does not turn on properly see page 42 3 Perform a complete self test T...

Page 38: ...ire like functions on adjacent channels Use shielded twisted pair PTFE â insulated cables to reduce settling and noise errors The diagrams on the next page show how to connect wiring to a multiplexer module for each measurement function 1 Remove the module cover 2 Connect wiring to the screw terminals 4 Replace the module cover Cable Tie Wrap optional 3 Route wiring through strain relief Chapter 2...

Page 39: ...100 MΩ RTD Types 0 00385 0 00391 Thermistor Types 2 2 k 5 k 10 k Channel n source is automatically paired with Channel n 10 sense on the 34901A or Channel n 8 sense on the 34902A Ranges 100 1 k 10 k 100 k 1 M 10 M 100 MΩ RTD Types 0 00385 0 00391 DC Current AC Current Valid only on channels 21 and 22 on the 34901A Ranges 10 mA 100 mA 1A 2 Chapter 2 Quick Start To Connect Wiring to a Module 37 ...

Page 40: ...stored in a separate non volatile memory queue 1 Set the time of day Use and to select the field to modify and turn the knob to change the value You can also edit the AM PM field TIME 03 45 PM 2 Set the date Use and to select the field to modify and turn the knob to change the value JUNE 01 2002 Utility Utility Chapter 2 Quick Start To Set the Time and Date 38 ...

Page 41: ...n each level of the menu When you press to make your selection the menu automatically guides you through all relevant choices to configure a measurement on the selected function When you have finished configuring the parameters you are automatically exited from the menu The present selection or default is displayed in full bright for easy identification When you make a different selection the new ...

Page 42: ...hannel being monitored at any time by turning the knob 2 Enable monitoring on the selected channel Any channel that can be read by the instrument can be monitored the MON annunciator turns on This includes any combination of temperature voltage resistance current frequency or period measurements on multiplexer channels You can also monitor a digital input port or the totalizer count on the multifu...

Page 43: ... channel Note will sequentially open all channels on the module in the selected slot The table below shows the low level control operations available for each of the plug in modules Plug In Module 34901A 20 Channel Mux 34902A 16 Channel Mux 34908A 40 Channel Single Ended Mux 1 34903A 20 Channel Actuator 34904A 4x8 Matrix 34905A Dual 4 Channel RF Mux 50Ω 2 34906A Dual 4 Channel RF Mux 75Ω 2 34907A ...

Page 44: ...ine voltage setting The line voltage is set to the proper value for your country when the instrument is shipped from the factory Change the voltage setting if it is not correct The settings are 100 120 220 or 240 Vac Note For 127 Vac operation use the 120 Vac setting For 230 Vac operation use the 220 Vac setting See the next page if you need to change the line voltage setting 3 Verify that the pow...

Page 45: ...age selector until the correct voltage appears in the window 4 Replace the fuse holder assembly in the rear panel Verify that the correct line voltage is selected and the power line fuse is good Fuse 500 mAT for all line voltages Agilent Part Number 2110 0458 100 120 127 220 230 or 240 Vac 2 Chapter 2 Quick Start If the Instrument Does Not Turn On 43 ...

Page 46: ... Handle To adjust the position grasp the handle by the sides and pull outward Then rotate the handle to the desired position Carrying Position Benchtop Viewing Positions Chapter 2 Quick Start To Adjust the Carrying Handle 44 ...

Page 47: ...it Any System II instrument of the same size can be rack mounted beside the 34970A Remove the carrying handle and the front and rear rubber bumpers before rack mounting the instrument To remove the handle rotate it to the vertical position and pull the ends outward Front Rear bottom view To remove the rubber bumper stretch a corner and then slide it off 2 Chapter 2 Quick Start To Rack Mount the In...

Page 48: ...ink kit 5061 9694 and flange kit 5063 9212 Be sure to use the support rails inside the rack cabinet To install one or two instruments in a sliding support shelf order shelf 5063 9255 and slide kit 1494 0015 for a single instrument also order filler panel 5002 3999 Chapter 2 Quick Start To Rack Mount the Instrument 46 ...

Page 49: ...3 Front Panel Overview 3 ...

Page 50: ...ment s capabilities and operation This chapter is divided into the following sections Front Panel Menu Reference on page 49 To Unsecure for Calibration on page 51 To Secure Against Calibration on page 51 To Change the Security Code on page 52 Error Messages on page 52 To Perform a Zero Adjustment on page 53 To Apply Mx B Scaling to Measurements on page 54 To Read the Relay Cycle Count on page 55 T...

Page 51: ...layed channel Set the gain M and offset B value for the displayed channel Make a null measurement and store it as the offset value Specify a custom label RPM PSI etc for the displayed channel Configure alarms on the displayed channel Select one of four alarms to report alarm conditions on the displayed channel Configure a high limit low limit or both for the displayed channel Configure a bit patte...

Page 52: ...r Query the firmware revisions for the mainframe and installed modules Select the instrument s power on configuration last or factory reset Enable disable the internal DMM Secure unsecure the instrument for calibration View readings alarms and errors View the last 100 scanned readings from memory last min max and average View the first 20 alarms in the alarm queue reading and time alarm occurred V...

Page 53: ...AL UNSECURED and SECURE CAL Note If you enter the wrong secure code NO MATCH is displayed and a new choice EXIT is shown To Secure Against Calibration You can secure the instrument either from the front panel or over the remote interface The instrument is secured when shipped from the factory and the security code is set to HP034970 Once you enter a security code that code must be used for both fr...

Page 54: ...ss the instrument is now secured with the new code Changing the code from the front panel also changes the code as seen from the remote interface Error Messages Error messages are retrieved in a first in first out FIFO order When the ERROR annunciator is on press to view error messages Use the arrow keys to scroll the message in the display A list of the self test errors messages and their meaning...

Page 55: ...nsiderations required for a valid adjustment 1 Configure the channel You must configure a channel before applying performing the adjustment procedure Configure the channel to DC VOLTS and 61 2 digits 2 Apply the input signal In this example the input signal is a copper short see page 66 3 Setup the calibration The display will show PERFORM CAL 4 Set the adjustment value The display will show the a...

Page 56: ...gain and offset values are reset M 1 and B 0 2 Set the gain and offset values The scaling values are stored in non volatile memory for the specified channels A Factory Reset turns off scaling and clears the scaling values on all channels An Instrument Preset or Card Reset does not clear the scaling values and does not turn off scaling 1 000 000 0 700 000 OHM 3 Select the custom label You can speci...

Page 57: ...only 20 relays Each relay is used to switch HI on two different channels and only one channel can be closed at a time The channels are arranged such that channels 01 and 21 use different contacts on the same relay The remaining channels are also paired in the same manner channels 02 and 22 channels 03 and 23 etc Therefore when you query the relay count on a channel the number reflects the number o...

Page 58: ...el 01 or 02 2 Read the specified port You can specify whether you want to use binary or decimal format Once you have selected the number base it is used for all input or output operations on the same port To change the number base press the key and select USE BINARY or USE DECIMAL 01010101 DIN The bit pattern read from the port will be displayed until you press another key turn the knob or until t...

Page 59: ...he bit pattern Use the knob and or keys to edit the individual bit values You can specify whether you want to use binary or decimal format Once you have selected the number base it is used for all input or output operations on the same port To change the number base press the key and select USE BINARY or USE DECIMAL 240 DOUT 4 Output the bit pattern to the specified port The specified bit pattern ...

Page 60: ... instrument You can configure the totalizer to reset the count to 0 after being read or it can count continuously and be manually reset READ RESET 3 Read the count The count is read once each time you press the count does not update automatically on the display As configured in this example the count is automatically reset to 0 each time you read it 12345 TOT The count will be displayed until you ...

Page 61: ...ing the knob until DAC is displayed channel 04 or 05 2 Enter the output voltage editor 00 000 V DAC 3 Set the desired output voltage Use the knob and or keys to edit the individual digits 05 250 V DAC 4 Output the voltage from the selected DAC The output voltage will be displayed until you press another key or turn the knob To manually reset the output voltage to 0 volts press 3 Chapter 3 Front Pa...

Page 62: ...60 ...

Page 63: ...4 Calibration Procedures 4 ...

Page 64: ...onsiderations on page 71 Performance Verification Tests on page 72 Internal DMM Verification Tests on page 75 Optional AC Performance Verification Tests on page 80 Internal DMM Adjustments on page 81 10 Vdc Adjustment Procedure Optional on page 85 Plug in Module Test Considerations on page 87 Relay Verification on page 88 Thermocouple Reference Junction Optional on page 112 34907A Analog Output on...

Page 65: ...ccuracy specifications are not warranted beyond the 1 year calibration interval Agilent does not recommend extending calibration intervals beyond 2 years for any application Adjustment is Recommended Whatever calibration interval you select Agilent recommends that complete re adjustment should always be performed at the calibration interval This will assure that the 34970A will remain within speci...

Page 66: ...he instrument configurations specified for each test over the remote interface You can then enter readback verification data into a test program and compare the results to the appropriate test limit values You can also adjust the instrument from the remote interface Remote adjustment is similar to the local front panel procedure You can use a computer to perform the adjustment by first selecting t...

Page 67: ...ur spec DC Current 1 Fluke 5700A 5725A 1 5 instrument 24 hour spec Resistance 1 Fluke 5700A 1 5 instrument 24 hour spec AC Voltage 1 Fluke 5700A 5725A 1 5 instrument 24 hour spec AC Current 1 Fluke 5700A 5725A 1 5 instrument 24 hour spec Frequency 1 Agilent 33220A 1 5 instrument 24 hour spec Analog Output 34907A Agilent 34401A 1 5 instrument 24 hour spec Thermocouple Reference Junction 34901A 3490...

Page 68: ...settling and noise errors Connect the shield to the source LO output You can also use a 34902A for test and adjustment of voltage frequency and resistance functions You cannot test or adjust current inputs with a 34902A If you use a 34902A connect the copper shorts to Channels 7 and 15 and make the input connections to Channels 8 and 16 34901A Connections for DC AC Current Connections for DC V AC ...

Page 69: ...security code is stored in non volatile memory and does not change when power has been off after a Factory Reset RST command or after an Instrument Preset SYSTem PRESet command The security code may contain up to 12 alphanumeric characters The first character must be a letter but the remaining characters can be letters numbers or an underscore _ You do not have to use all 12 characters but the fir...

Page 70: ... shock and personal injury be careful not to touch the power line connections 1 Disconnect the power cord and all input connections 2 Remove the instrument cover see page 174 Turn the instrument over 3 Apply power and turn on the instrument Be careful not to touch the power line connections 4 Apply a short between the two exposed metal pads marked CAL UNLOCK as shown in the figure below 5 While ma...

Page 71: ... the front panel you can view 13 characters of the message at a time Press to scroll through the text of the message Press again to increase the scrolling speed Calibration Count You can query the instrument to determine how many calibrations have been performed Note that your instrument was calibrated before it left the factory When you receive your instrument be sure to read the count to determi...

Page 72: ... in Progress Sometimes it may be necessary to abort a calibration after the procedure has already been initiated You can abort a calibration at any time by turning off the power When performing a calibration from the remote interface you can abort a calibration by issuing a remote interface device clear message C A U T I O N If you abort a calibration in progress when the instrument is attempting ...

Page 73: ...eld to the source LO output Except where noted in the procedures connect the calibrator LO source to earth ground Two wire Ohms measurements are affected by the entire path length including the plug in card trace length and slot trace lengths On the 34901A Channel 10 is recommended as the median path length on the 34902A use Channel 8 for 2 wire Ohms verification and adjustments Install the input ...

Page 74: ...cation tests that give a high confidence that the instrument is operational Quick Verification A combination of the internal self tests and selected verification tests Performance Verification Tests An extensive set of tests that are recommended as an acceptance test when you first receive the instrument or after performing adjustments Optional Verification Tests Tests not performed with every cal...

Page 75: ...t beeps a complete description of these tests can be found in chapter 6 The instrument will automatically perform the complete self test procedure when you release the key The self test will complete in approximately 20 seconds If the self test is successful PASS is displayed on the front panel If the self test fails FAIL is displayed and the ERROR annunciator turns on If repair is required see ch...

Page 76: ... page 73 Perform only the performance verification tests indicated with the letter Q If the instrument fails the quick performance check adjustment or repair is required Performance Verification Tests The performance verification tests are recommended as acceptance tests when you first receive the instrument The acceptance test results should be compared against the 90 day test limits You should u...

Page 77: ...formed for those functions and ranges with unique offset calibration constants Measurements are checked for each function and range as described in the procedure below Zero Offset Verification Procedure 1 Make sure you have read Test Considerations on page 71 2 This procedure will measure the shorts installed on Channels 209 and 219 Leave the Amps input connections Channel 221 open Continued on ne...

Page 78: ...90 day 1 year Short Short Short Short Short DC Volts 100 mV 1 V 10 V 100 V 300 V Q 3 5 µV 6 µV 40 µV 600 µV 6 mV 4 µV 7 µV 50 µV 600 µV 9 mV 4 µV 7 µV 50 µV 600 µV 9 mV Short Short Short Short Short Short Short 2 Wire Ohms 2 and 4 Wire Ohms 100 Ω 1 kΩ 10 kΩ 100 kΩ 1 MΩ 10 MΩ 100 MΩ Q 3 5 mΩ 6 mΩ 50 mΩ 500 mΩ 10 Ω 100 Ω 10 kΩ 4 mΩ 10 mΩ 100 mΩ 1 Ω 10 Ω 100 Ω 10 kΩ 4 mΩ 10 mΩ 100 mΩ 1 Ω 10 Ω 100 Ω 1...

Page 79: ...0 V DC Volts 100 mV 1 V 10 V 100 V 300 V Q Q 6 5 µV 26 µV 190 µV 2 6 mV 12 mV 8 µV 37 µV 250 µV 4 1 mV 19 5 mV 9 µV 47 µV 400 µV 5 1 mV 22 5 mV 100 Ω 1 kΩ 10 kΩ 100 kΩ 1 MΩ 10 MΩ 100 MΩ 3 2 Wire Ohms 2 and 4 Wire Ohms 100 Ω 1 kΩ 10 kΩ 100 kΩ 1 MΩ 10 MΩ 100 MΩ Q Q 6 5 mΩ 26 mΩ 250 mΩ 2 5 Ω 30 Ω 1 6 kΩ 310 kΩ 12 mΩ 90 mΩ 900 mΩ 9 Ω 90 Ω 2 1 kΩ 801 kΩ 14 mΩ 110 mΩ 1 1 Ω 11 Ω 110 Ω 4 1 kΩ 810 kΩ Input...

Page 80: ...kHz 50 kHz 1 kHz 50 kHz 100 mV 1 10 V 100 mV 100 V 300 V Q Q Q 70 µV 150 µV 700 µV 1 5 mV 7 mV 15 mV 7 mV 34 µV 70 mV 150 mV 270 mV 600 mV 90 µV 160 µV 900 µV 1 6 mV 9 mV 16 mV 9 mV 45 µV 90 mV 160 mV 390 mV 690 mV 100 µV 170 µV 1 mV 1 7 mV 10 mV 17 mV 10 mV 46 µV 100 mV 170 mV 420 mV 720 mV 1 For this test isolate the calibrator s output from earth ground 2 Some calibrators may have difficulty dr...

Page 81: ...100 mA 1 10 mA 1A 1 1 kHz 1 kHz 1 kHz 1 kHz 10 mA 100 mA 1 A 1A Q 14 µA 600 µA 1 41 mA 1 4 mA 14 µA 600 µA 1 41 mA 1 4 mA 14 µA 600 µA 1 41 mA 1 4 mA 1 Verify only no adjustment Frequency Gain Verification Test Configuration Frequency 61 2 digits 1 Make sure you have read Test Considerations on page 71 2 Select Channel 210 select the FREQUENCY function and set 61 2 digits 3 Select each range in th...

Page 82: ...st you must press to enable reading monitoring on the selected channel or use the ROUTe MON command from the remote interface 3 Select each range in the order shown below Compare measurement results to the appropriate test limits shown in the table Be certain to allow for appropriate source settling Input Voltage Frequency Range Error from Nominal 24 hour 90 day 1 year 1 V 1 V 1 V 1 V 10 V 1 V 100...

Page 83: ...the Internal DMM during Zero Adjustment This may cause ALL calibration memory to be lost Zero Adjustment Procedure The zero adjustment procedure takes about 5 minutes to complete Be sure to allow the instrument to warm up for 2 hours before performing the adjustments Follow the steps outlined below Review Test Considerations on page 71 before beginning this test Also see page 53 for an example of ...

Page 84: ...e tables used for gain adjustments Gain Adjustment Considerations The zero adjustment procedure must have been recently performed prior to beginning any gain adjustment procedures The optional 10 Vdc adjustment should be performed only after servicing the Internal DMM s a to d converter or after replacing network A4U101 or calibration RAM A4U505 When performing a 4 wire ohms gain adjustment a new ...

Page 85: ...0Ω to 10 MΩ 10 mA to 1 A 10 mV to 100 V 300 V 1 A Any 0 9 to 1 1 x Full Scale 250 V to 303 V 0 9 to 1 1 x Full Scale 0 9 to 1 1 x Full Scale 0 9 to 1 1 x Full Scale 95 V to 303 V 9 mA to 11 mA Any Input 100 mV rms 1 kHz 100 kHz 1 Valid frequencies are as follows 1 kHz 10 for the 1 kHz calibration 45 kHz 100 kHz for the 50 kHz calibration and 10 Hz 10 for the 10 Hz calibration 4 Chapter 4 Calibrati...

Page 86: ...gain verification tables pages 75 79 2 Apply the input signal shown in the Input column of the appropriate verification table Note Always complete tests in the same order as shown in the appropriate verification table 3 Press to enter the calibration menu Press again to begin the adjustment procedure 4 Use the knob and to set the number in the display to the actual input value and press 5 Perform ...

Page 87: ... Measure and note the voltage offset present at the end of the measurement cable by shorting the ends of the Channel 210 measurement cable Be sure to use a copper wire and allow enough time for the residual thermal offset to stabilize usually about 1 minute 4 Connect the input cable to the calibrator output and set the calibrator to output 10V Allow enough settling time for any thermal offset volt...

Page 88: ...stment procedure Be sure to allow time for thermal offsets to stabilize usually about 1 minute 3 Use the knob and to set the number in the display to the difference of the calibrator output and the measured offset from step 3 and press Using the previous example values enter 10 µV minus 10 001 volts or 10 000990 volts 4 When the adjustment finishes verify that new readings fall within 30 µV of the...

Page 89: ...he plug in module and allow a 45 minute warm up period before verification or adjustment Use shielded twisted pair PTFE insulated cables to reduce settling and noise errors Keep the input cables as short as possible Remove all user wiring and connections from the plug in modules before verification or adjustment Use 4 wire Ohms measurement techniques for checking relay contact resistance Check dir...

Page 90: ...a function or range is changed on a module The 34908A multiplexer contains 40 channels which are switched HI only using only 20 relays Each relay is used to switch HI on two different channels and only one channel can be closed at a time The channels are arranged such that channels 01 and 21 use different contacts on the same relay The remaining channels are also paired in the same manner Channels...

Page 91: ...tion For these measurements the 34901A is not installed in the 34970A Record the 4 wire ohms measurements from the external DMM in the table below Note The connections to the external DMM are different for each of Tests 1 2 4 and 5 Be sure to verify the connections shown in the table below for each of the four tests External DMM Ohmmeter Connections Test HI LO HI Sense LO Sense Measured Value 1 L4...

Page 92: ...d to make shorts across the channels in Tests 6 through 39 Probe here for F501 measurement Probe here for F502 measurement Probe here for L402 measurement Connections for 34901A Verification Tests 1 through 5 Note Be sure to probe the components at the indicated locations on the module Chapter 4 Calibration Procedures Relay Verification 90 ...

Page 93: ... digits Enable reading monitoring by pressing on the selected channel or use the ROUTe MON command Record the 4 wire ohms measurements from the external DMM in the following table External DMM Ohmmeter Connections Test Channel Configured HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured 6 Ch 20 P2 P2 P1 P1 __________ Ohms 2 00Ω K421 7 Ch 20 P2 P2 P3 P3 __________ Ohms 8 Subtract Tes...

Page 94: ...e channel shown in the Channel Closed column below module in slot 200 Turn the Monitor Mode off and select Banks Joined from the Advanced menu Record the 4 wire ohms measurements from the external DMM in the following table External DMM Ohmmeter Connections Test Channel Closed HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured 11 Ch 1 P2 P2 P1 P1 __________ Ohms 2 00Ω K401 12 Ch 2 P2...

Page 95: ...h 14 P2 P2 P1 P1 __________ Ohms 2 00Ω K414 25 Ch 15 P2 P2 P1 P1 __________ Ohms 2 00Ω K415 26 Ch 16 P2 P2 P1 P1 __________ Ohms 2 00Ω K416 27 Ch 17 P2 P2 P1 P1 __________ Ohms 2 00Ω K417 28 Ch 18 P2 P2 P1 P1 __________ Ohms 2 00Ω K418 29 Ch 19 P2 P2 P1 P1 __________ Ohms 2 00Ω K419 30 Ch 21 P4 P4 P5 P5 __________ Ohms 31 Subtract Test 30 Test 4 __________ Ohms 2 00Ω K522 32 Ch 22 P4 P4 P5 P5 ____...

Page 96: ...4 wire ohms measurements below Add a copper short between the L and H terminals on Channel 20 Record the measured value as Test 34 in the table below Using the external DMM make a 4 wire ohms measurement between the L and I terminals on Channel 21 Record the measured value as Test 35 in the table below External DMM Ohmmeter Connections Test Channel Closed HI LO HI Sense LO Sense Measured Value Tes...

Page 97: ...s 2 00Ω K521 Tests 38 39 Open all channels on the module by performing a Factory Reset Close Channel 21 module in slot 200 Remove the 34901A from the 34970A and do not reinstall it for the remaining tests Using the external DMM make a 4 wire ohms measurement between the L and I terminals on Channel 22 Record the measured value as Test 38 in the following table External DMM Ohmmeter Connections Tes...

Page 98: ...omponents at the indicated location For these measurements the 34902A is not installed in the 34970A Record the 4 wire ohms measurements from the external DMM in the table below Note The connections to the external DMM are different for each of Tests 1 2 and 3 Be sure to verify the connections shown in the table below for each of the three tests External DMM Ohmmeter Connections Test HI LO HI Sens...

Page 99: ...Connections for 34902A Verification Tests 1 through 4 Probe here for L302 and L301 measurements Module Reference 4 Chapter 4 Calibration Procedures Relay Verification 97 ...

Page 100: ...51 2 digits Enable reading monitoring by pressing on the selected channel or use the ROUTe MON command Record the 4 wire ohms measurements from the external DMM in the following table External DMM Ohmmeter Connections Test Channel Configured HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured 5 Ch 16 P3 P3 P1 P1 __________ Ohms 6 Subtract Test 5 Test 1 __________ Ohms 2 00Ω K326 7 Ch ...

Page 101: ... For each test close only the channels shown in the Channels Closed column below module in slot 200 Turn the Monitor Mode off and select Banks Joined from the Advanced menu Record the 4 wire ohms measurements from the external DMM in the following table External DMM Ohmmeter Connections Test Channels Closed HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured 11 Ch 16 1 P3 P3 P1 P1 ___...

Page 102: ...16 10 P3 P3 P1 P1 __________ Ohms 2 00Ω K310 21 Ch 16 11 P3 P3 P1 P1 __________ Ohms 2 00Ω K311 22 Ch 16 12 P3 P3 P1 P1 __________ Ohms 2 00Ω K312 23 Ch 16 13 P3 P3 P1 P1 __________ Ohms 2 00Ω K313 24 Ch 16 14 P3 P3 P1 P1 __________ Ohms 2 00Ω K314 25 Ch 16 15 P3 P3 P1 P1 __________ Ohms 2 00Ω K315 26 Ch 16 15 P3 P3 P4 P4 __________ Ohms 2 00Ω 27 Subtract Test 26 Test 25 __________ Ohms 2 00Ω K316...

Page 103: ...om the CM terminal to the NO terminal on each channel 4 Install the module in slot 100 Open Channel 01 through 20 Remove the module from the 34970A 5 Measure the resistance from the CM terminal to the NC terminal on each channel Note In general a new relay should have a contact resistance of less than 0 2Ω Relays with contact resistance in excess of 1 2Ω should be replaced Module Reference 4 Chapt...

Page 104: ...tions on page 87 2 Connect coppers shorts from H to L on each of the eight columns COL1 through COL8 as shown below Connect four dual banana plugs to the four rows as shown below ROW1 through ROW4 Be sure to route your wiring for proper strain relief and install the module cover Install the 34904A in slot 200 of the 34970A Connections for 34904A Verification Tests Chapter 4 Calibration Procedures ...

Page 105: ...______ Ohms 2 00Ω K103 4 Ch 14 44 P1 P1 P4 P4 __________ Ohms 2 00Ω K104 5 Ch 15 45 P1 P1 P4 P4 __________ Ohms 2 00Ω K105 6 Ch 16 46 P1 P1 P4 P4 __________ Ohms 2 00Ω K106 7 Ch 17 47 P1 P1 P4 P4 __________ Ohms 2 00Ω K107 8 Ch 18 48 P1 P1 P4 P4 __________ Ohms 2 00Ω K108 9 Ch 21 41 P2 P2 P4 P4 __________ Ohms 2 00Ω K201 10 Ch 22 42 P2 P2 P4 P4 __________ Ohms 2 00Ω K202 11 Ch 23 43 P2 P2 P4 P4 __...

Page 106: ... 37 47 P3 P3 P4 P4 __________ Ohms 2 00Ω K307 24 Ch 38 48 P3 P3 P4 P4 __________ Ohms 2 00Ω K308 25 Ch 41 11 P4 P4 P1 P1 __________ Ohms 2 00Ω K401 26 Ch 42 12 P4 P4 P1 P1 __________ Ohms 2 00Ω K402 27 Ch 43 13 P4 P4 P1 P1 __________ Ohms 2 00Ω K403 28 Ch 44 14 P4 P4 P1 P1 __________ Ohms 2 00Ω K404 29 Ch 45 15 P4 P4 P1 P1 __________ Ohms 2 00Ω K405 30 Ch 46 16 P4 P4 P1 P1 __________ Ohms 2 00Ω K4...

Page 107: ... the DMM Be sure to use the correct SMB connectors for the module 3 Install the module in slot 100 4 Close Channel 11 5 Measure the resistance on the DMM 6 Repeat steps 4 and 5 for Channels 12 13 and 14 7 Repeat steps 2 3 4 5 and 6 for the channels connected to COM2 Note In general a new relay should have a contact resistance of less than 0 5Ω Relays with contact resistance in excess of 1Ω should ...

Page 108: ...o read Plug in Module Test Considerations on page 87 Test 1 See the diagram on page 107 for the required connections for this test be sure to probe the inductor at the indicated location For this measurement the 34908A is not installed in the 34970A Record the 4 wire ohms measurements from the external DMM in the table below External DMM Ohmmeter Connections Test HI LO HI Sense LO Sense Measured V...

Page 109: ...Module Reference Note Be sure to probe from the right hand side of the inductor Connections for 34908A Verification Test 1 4 Chapter 4 Calibration Procedures Relay Verification 107 ...

Page 110: ...1 as follows DC volts 10 volt range and 51 2 digits Enable reading monitoring by pressing on the selected channel or use the ROUTe MON command Record the 4 wire ohms measurements from the external DMM in the following table External DMM Ohmmeter Connections Test Channel Configured HI LO HI Sense LO Sense Measured Value Test Limit Relay Measured 2 Ch 01 H Com L Com H Com L Com __________ Ohms 3 Sub...

Page 111: ...l the 34908A in slot 200 of the 34970A For each test shown in the table starting on the next page close only the channels shown in the Channels Closed column closing one channel will open the previously closed channel Record the 4 wire ohms measurements from the external DMM in the table Module Reference Connections for 34908A Verification Tests 4 through 43 4 Chapter 4 Calibration Procedures Rela...

Page 112: ... Ch 10 H Com L Com H Com L Com __________ Ohms 2 00Ω K410 K422 14 Ch 11 H Com L Com H Com L Com __________ Ohms 2 00Ω K411 K422 15 Ch 12 H Com L Com H Com L Com __________ Ohms 2 00Ω K412 K422 16 Ch 13 H Com L Com H Com L Com __________ Ohms 2 00Ω K413 K422 17 Ch 14 H Com L Com H Com L Com __________ Ohms 2 00Ω K414 K422 18 Ch 15 H Com L Com H Com L Com __________ Ohms 2 00Ω K415 K422 19 Ch 16 H C...

Page 113: ...Com __________ Ohms 2 00Ω K410 K422 34 Ch 31 H Com L Com H Com L Com __________ Ohms 2 00Ω K411 K422 35 Ch 32 H Com L Com H Com L Com __________ Ohms 2 00Ω K412 K422 36 Ch 33 H Com L Com H Com L Com __________ Ohms 2 00Ω K413 K422 37 Ch 34 H Com L Com H Com L Com __________ Ohms 2 00Ω K414 K422 38 Ch 35 H Com L Com H Com L Com __________ Ohms 2 00Ω K415 K422 39 Ch 36 H Com L Com H Com L Com ______...

Page 114: ... Considerations on page 87 2 Connect a calibrated thermocouple with an accuracy of 0 1 C or better to one of the following channels For the 34901A Channel 10 For the 34902A Channel 8 For the 34908A Channel 10 3 Install the module in slot 100 4 Place the J Type calibrated thermocouple at a known temperature ice bath or calibrator 5 Select Channel 110 or 108 Configure the channel as follows TEMPERAT...

Page 115: ...ls 6 and 16 Keep the thermistor leads as short as possible Locate the thermistor as near to the input connectors as possible 2 Install the plug in module in the mainframe in slot 200 Apply power and allow a 2 hour warm up 3 Set 10 kΩ thermistor measurements on Channels 206 and 217 or 206 and 211 Before executing each test you must press to enable reading monitoring on the selected channel or use t...

Page 116: ...tput values with unique calibration constants 1 Make connections to analog output channels as shown below 2 For each analog output set each output value in the table below Compare measurement results to the appropriate test limits shown in the table DAC Output Quick Check Measured Output Error from Nominal 1 year 0 000 V 10 000 V Q 0 000 V 10 000 V 20 mV 45 mV 34907A To DMM To DMM Chapter 4 Calibr...

Page 117: ...3 Set the analog output to 00 000 V 4 Press to enter the calibration menu Press again to begin the adjustment procedure 5 Use the knob and to set the number in the display to the measured output value and press to complete the adjustment 6 Set the analog output to 10 000 V 7 Press to enter the calibration menu Press again to begin the adjustment procedure 8 Use the knob and to set the number in th...

Page 118: ...116 ...

Page 119: ...5 Theory of Operation 5 ...

Page 120: ...ed descriptions of the circuitry contained in the schematics chapter System Block Diagram on page 119 Floating Logic on page 120 Memory on page 123 Earth Referenced Logic on page 124 Power Supplies on page 125 Front Panel on page 127 Backplane on page 128 Internal DMM on page 129 Switch Modules on page 138 Multifunction Module on page 151 The self test procedures are described in chapter 6 118 ...

Page 121: ...ram is shown on page 221 Not all systems have an Internal DMM In these systems the internal DMM connections to the analog bus and the floating logic are left open The major portions of each block are described in the following sections 5 Chapter 5 Theory of Operation System Block Diagram 119 ...

Page 122: ...troller U205 custom ASIC U209 calibration memory U201 12 MHz clock oscillator U204 and microprocessor supervisor U104 The microprocessor supervisor U104 performs the following functions Monitors the regulated 5V floating supply and generates the reset signal for main controller U205 when the voltage drops below operating levels Monitors the unregulated side of the 5V floating supply in order to ge...

Page 123: ...e PREADJ is used to adjust the precharge amplifier offset voltage in U101 on the internal DMM assembly A4 A full UART controlled serial port is used to communicate with the I O processor through optoisolators U303 and U214 Data is sent in an 11 bit frame at a rate of 187 5 kbits second The 11 bit frame is configured for one start bit nine data bits and one stop bit A timer is used to measure the p...

Page 124: ...sed on a 100 year calendar it accurately tracks leap years until its two digit year counter rolls over U209 uses the battery backed 5V_NV supply DMM support U209 provides conversion logic for the analog to digital converter and a counter for both the ADC and the frequency measurement features of the DMM When used for the ADC the COMP input functions both as a clocked comparator and the slope count...

Page 125: ...8000H thru FFFFH any selected 32 Kbyte page of ROM or RAM The memory is organized with a 16 bit data bus AD 15 0 and a 19 bit address bus MA 19 1 The memory address is produced by U209 latching the address present on AD 15 0 when U205 asserts ALE_FLT Reads of memory are always 16 bits wide there is a single RD_N signal Writes however can be byte wide and therefore U209 produces both a high byte wr...

Page 126: ...face circuits and the floating measurement logic is accomplished through an optically isolated bi directional serial interface Isolator U214 couples data from U305 to microprocessor U205 Isolator U303 couples data from U305 to microprocessor U205 U305 also Controls power to the backplane as well as all rear panel interfaces GPIB RS 232 Alarms External Triggers Backplane power is turned on or off b...

Page 127: ... by bridge rectifier CR105 filter capacitor C104 and regulator U103 The output of CR105 is sensed by U104 and compared to the the voltage from battery BT101 U104 turns on the 5 V floating supply through Q120 If the output of CR105 falls below 6 8 V U104 provides a PWRFAIL signal to the main processor At initial power on U104 resets the main processor with the FLT_RST line This supply powers all fl...

Page 128: ... U320 and U302 The rear panel interfaces GPIB RS 232 Alarms and external triggers are powered from the switched 5V_BP supply to ensure that when power is turned off no voltages are present at the interfaces The 5V_ER supply is switched by Q101A and Q101B to create the 5V_BP backplane and fan power supplies Undervoltage sensor U102 provides the earth reference controller reset at initial power on C...

Page 129: ... segment and 18 volts for an off segment The 11 V cathode bias for the display is provided by the main pc boards filament winding center tap bias circuit A1CR108 A1R106 and A1C106 shown on the power supply schematic see page 224 Keyboard scanning is accomplished through a conventional scanned row column key matrix Keys are scanned by outputting data at microprocessor U1 port pins P0 0 through P0 4...

Page 130: ...voltages by E101 E102 RV101 RV102 R101 R160 L101 L102 and C109 P105 makes the analog bus connection to the internal DMM Digital Bus The digital bus uses 10 lines for communication and control P104 makes the digital bus connection to the earth referenced logic and floating logic Signal P101 P102 P103 Pins Comments Slot ID A6 A7 A8 Unique binary code for each slot DATA_IN B6 Serial module data from ...

Page 131: ...M Block Diagram The internal DMM block diagram is shown on the system block diagram on page 221 A portion of the block diagram is shown below Backplane Main Controller 5 Chapter 5 Theory of Operation Internal DMM 129 ...

Page 132: ...ay for each measuring function All relay coils are driven from U150 Function K102 K103 K104 Sense at 0 1 V 10 Vdc 100 V 300 Vdc 2 Wire Ohms 4 Wire Ohms AC Voltage Frequency Period 3 A 1A DC I 100 mA 10 mA DC I 1A AC I Set Set Reset Reset Set Set Reset Set Reset Set Reset Set Set Reset Reset Reset Reset Reset Set 1 Set Reset 2 Reset 2 Reset Reset Reset Reset Set U101 5 U102 12 U101 5 3 AC_IN AC_IN ...

Page 133: ... of MC and MZ Autozero off disables the dynamic switching of the amplifier input However a new MZ value is automatically taken whenever a new function or range is selected even if autozero is turned off In the dc voltage function ranging is accomplished through both input relay switching K102 K104 and solid state switching U101 As a result the input to the ADC has the same nominal 10 V value for a...

Page 134: ...ance U102A in parallel with the unknown input resistance while applying the 500 nA current source The result is computed from the measured data The internal 10 MΩ resistance is determined whenever a zero calibration is performed In the 2 wire ohms function the voltage drop is measured across the Input HI and Input LO terminals In the 4 wire ohms function the voltage is measured across the HI Sense...

Page 135: ... force a reference voltage across the selected current source range resistor 5 kΩ 50 kΩ 500 kΩ 1 MΩ by U201B The resulting precision current flows through JFET Q202 and protection circuit Q203 to Q211 and CR202 to relay K102 where it is switched to the Input HI terminal for ohms measurements The protection circuits are designed to protect the ohms current source from inadvertently applied voltages...

Page 136: ... the input to the ac circuit may contain a dc bias from the applied ac signal Input coupling capacitor C301 blocks the dc portion of the input signal Only the ac component of the input signal is measured by the multimeter The ac circuit voltage ranging comprises two gain stages U301 and U305 U312 The voltage gains for each stage are tabulated below Function Range Shunt Resistor 1st Stage 2nd Stage...

Page 137: ...F ON OFF OFF OFF ON The output of the 2nd stage is connected to the rms to dc converter stage Any residual dc offset from the amplifier stages is blocked by capacitor C316 Buffer U307 drives the input to the rms to dc converter as well as the frequency comparator U310A input The rms to dc converter has two selectable averaging filters C318 and C318 plus C321 for the analog computer circuit of U308...

Page 138: ...teer fixed positive or negative reference currents onto the integrator capacitor to cancel or balance the accumulated input charge The level shifted R403 and R406 output of the integrator is checked every 2 66 µs by the A1U209 COMP input Logic state machines in A1U209 control the U411 current steering to continuously seek an approximate 2 5 V level on the integrator amplifier output FLASH If the A...

Page 139: ...converted by the on chip ADC of CPU A1U205 The instrument precision voltage reference is U403 Resistor R409 provides a stable bias current for the reference zener diode R408 and CR404 provide a bias to assure that the reference zener biases to 7 V during power up IC U400A amplifies the voltage reference to 10 V while amplifier U401A inverts the 10 V reference to 10 V The reference voltages force p...

Page 140: ... Channel MUX with T C Compensation 142 34902A 16 Channel Reed MUX with T C Compensation 144 34903A 20 Channel Actuator 146 34904A 4 X 8 Matrix Switch 147 34905A 50 Ω Dual 4 1 VHF MUX 148 34906A 75 Ω Dual 4 1 VHF MUX 148 34908A 40 Channel Single Ended MUX with T C Compensation 149 Switch Module Control A simplified block diagram of a typical module controller is shown below Chapter 5 Theory of Oper...

Page 141: ... communications use an 11 bit protocol a start bit 8 data bits an attention bit and a stop bit The attention bit is 1 if the 8 data bits are an address command or 0 if the 8 data bits modify or provide data for the previously sent command The module controller uses the hardwired slot ID bits to decode the serial bit stream address When the address command message address matches the slot ID the pl...

Page 142: ... use a buffered 5 Volt power supply U101 supplies two drive enable lines DR_EN and 5NL_EN that connect Vcc from the digital bus with the relay drive lines through Q101 5R or 5NL To minimize the current through DGND caused by static discharge the ground return ZGND is isolated from the backplane ground through a bead L102 Relay Drivers Two types of single coil relays are used on the switch modules ...

Page 143: ...el in the row column driver circuitry the appropriate row driver PNP transistor is turned on connecting the 5R supply to the positive side of several relay coils and ZGND is applied to the negative side of the desired relay coil through a column driver NPN transistor To reset a relay ZGND is applied through an NPN row driver transistor and 5R through a PNP column driver Tree latching relays are dr...

Page 144: ...m the module controller are divided into five control lines by the binary to octal converter U109 The row latch U102 and column latches U103 and U104 control the relays The row drivers are divided into four groups of set and reset drivers Each group of row drivers controls five relays The column drivers operate as a pair There are ten column drivers each controlling two relays The analog bus backp...

Page 145: ...ources are connected to channels 1 through 10 and the sense is obtained from channels 11 through 20 K421 and K423 control the connection to the analog bus for measurements using the Internal DMM The current measurement channels are selected by relay K522 Relays K523 and K524 short the inputs when a channel is not selected Relay K521 makes the connection to the analog bus for measurement by the Int...

Page 146: ...try has of two groupings of latches relay drivers and relays The 16 voltage and resistance measurement channels are directly driven Tree switching controls the 2 wire 4 wire Ohms operation and connections to the analog bus The reed relays are non latching and the relay driver and 5R is applied while a channel is closed Chapter 5 Theory of Operation Switch Modules 144 ...

Page 147: ...pendent of each other and this configuration is used for 4 wire Ohms multiplexing where the Ohms current source is connected to channels 1 through 8 and the sense is obtained from channels 9 through 16 Relays K326 and K328 control the connection to the analog bus for measurements using the internal DMM Module Reference 5 Chapter 5 Theory of Operation Switch Modules 145 ...

Page 148: ...are for control purposes arranged into 8 rows by 10 columns The row latch U102 and column latches U103 and U104 control the relays The row drivers are divided into four groups of set and reset drivers Each group of row drivers controls five relays The column drivers operate as a pair There are ten column drivers each controlling two relays The 34903A provides 20 channels of Form C switching Chapte...

Page 149: ...ys divided into 4 rows by 8 columns The row latch U102 and column latch U103 control the relays The row drivers are divided into four groups of set and reset drivers Each group of row drivers controls eight relays The column drivers operate as a pair There are eight column drivers each controlling four relays The relays are arranged in 4 rows by 8 columns Module Reference 5 Chapter 5 Theory of Ope...

Page 150: ...fers relay drivers and relays one for each multiplexer bank Bank1 latch U102 and Bank2 latch U103 control the relays The bank drivers are divided into six groups of set and reset drivers Each set and reset driver controls one relay The column drivers operate as a pair There are six column drivers each controlling a relay The relays are arranged into two independent banks Chapter 5 Theory of Operat...

Page 151: ...rranged into 8 rows by 10 columns Tree switching controls bank selection and connections to the analog bus The row latch U102 and column latches U103 and U104 control the relays The row drivers are divided into four groups of set and reset drivers Each group of row drivers controls five relays The column drivers operate as a pair There are ten column drivers each controlling two relays The analog ...

Page 152: ...channel is connected to the common is performed by relay K422 Channels are paired 20 channels apart Ch 1 with Ch 21 Ch 2 with Ch 22 etc Relay K421 connects the common to the backplane analog bus for use with the internal DMM Chapter 5 Theory of Operation Switch Modules 150 ...

Page 153: ... 16 bit analog outputs Multifunction Control Components in this discussion are located on the A1 circuit assembly 34907 66501 The schematics are included in Chapter 8 starting on page 261 A simplified block of the module control circuit is shown below Module Reference 5 Chapter 5 Theory of Operation Multifunction Module 151 ...

Page 154: ...se an 11 bit protocol a start bit 8 data bits an attention bit and a stop bit The attention bit is 1 if the 8 data bits are an address command or 0 if the 8 data bits modify or provide data for the previously sent command The module controller uses the hardwired slot ID bits to decode the serial bit stream address When the address command message address matches the slot ID the plug in is selected...

Page 155: ...on the totalizer counts pulses with TTL trigger levels With the jumper at P102 in the AC position the trigger level is at zero The GATE and GATE input signals control when counting occurs If no signal is connected the totalizer counts any changing signal on the inputs A TTL low on the GATE input or a TTL high on GATE input will halt counting Count edge selection is controlled from a U101 port bit ...

Page 156: ... is used to provide the 15V supplies to U505 and U506 The 15V supplies also are used at the input of the totalizer U502 provides the 5 V supply used by the DACs A line from U101 P0 4 is used to control the output of U510 After a reset or power up U510 is held in the shutdown state U101 turns on the DC DC converter in response to commands from the main controller The main controller paces the turn ...

Page 157: ...d into the input latches U105 and U106 simultaneously MOSFETs are used to provide the low level output and 74HC240 s are used to provide the high level output During an output low a logic high level is applied to the gate of the MOSFET causing it to conduct and creating a low resistance path from the data line to ZGND In this state the MOSFET is capable of sinking an externally supplied current of...

Page 158: ...ut signal level is above 1 4 Vdc a voltage greater then 2 1 Vdc is applied to the non inverting input of the comparator causing its output to go high When the input signal is less than 1 4 Vdc a voltage less than 2 1 Vdc is applied to the comparator s non inverting input causing its output to go low This ensures an input voltage 1 4 Vdc is interpreted as a TTL low level and an input 1 4 Vdc is int...

Page 159: ...6 Service 6 ...

Page 160: ...159 Types of Service Available on page 160 Repackaging for Shipment on page 161 Cleaning on page 161 Electrostatic Discharge ESD Precautions on page 162 Surface Mount Repair on page 162 To Replace the Power Line Fuse on page 163 also depicted on page 42 Troubleshooting Hints on page 163 Self Test Procedures on page 167 Battery Check and Replacement on page 172 Disassembly on page 174 158 ...

Page 161: ...age setting See If the Instrument Does Not Turn On on page 42 Does the instrument fail self test Verify that the correct power line voltage is selected See If the Instrument Does Not Turn On on page 42 Remove all input connections to the instrument Errors may be induced by ac signals present on the input wiring during a self test Long test leads can act as an antenna causing pick up of ac signals ...

Page 162: ...e remaining warranty of the defective 34970A Agilent Unit Exchange Contact your nearest Agilent Technologies Service Center to arrange to have your instrument replaced In the U S call 800 829 4444 Select Option 3 followed by Option 1 Note Agilent Unit Exchange applies to the 34970A mainframe only Plug in modules are not supported as exchange assemblies When exchanging the 34970A do not ship plug i...

Page 163: ...e or metal bands If the original shipping container is not available place your unit in a container which will ensure at least 4 inches of compressible packaging material around all sides for the instrument Use static free packaging materials to avoid additional damage to your unit Agilent suggests that you always insure shipments Cleaning Clean the outside of the instrument and plug in modules wi...

Page 164: ...ve all plastic styrofoam vinyl paper and other static generating materials from the immediate work area Use only anti static solder suckers WARNING SHOCK HAZARD Only service trained personnel who are aware of the hazards involved should remove the instrument covers To avoid electrical shock and personal injury make sure to disconnect the power cord from the instrument before removing the covers Su...

Page 165: ...ed within the last year see page 63 The instrument s circuits allow troubleshooting and repair with basic equipment such as a 61 2 digit multimeter Unit is Inoperative Verify that the ac power cord is connected to the instrument Verify that the front panel On Standby switch has been pushed Verify that the power line fuse is installed and not open see page 42 The instrument is shipped from the fact...

Page 166: ...er and power supplies Try to operate the instrument from a remote interface If remote operations are normal the display should be replaced or repaired Isolate the internal DMM by removing it The instrument should operate and pass self test without the internal DMM installed Disassembly procedures start on page 174 Unit Fails Self Test Verify that the correct power line voltage setting is selected ...

Page 167: ...o check the power supplies remove the instrument cover as shown on page 174 The power supplies can be checked from the bottom of the instrument as shown below Be sure to use the correct ground point when checking the supplies Continued on the next page W a r n i n g Exposed Mains Do Not Touch 18 V float 18 V float 5 V float Ground Float 6 Vrms filament Chassis Earth Reference 5 V Earth Referenced ...

Page 168: ... V No 6 Vrms Filament Yes Check that the input to the supply voltage regulator is at least 1 V greater than its output Circuit failures can cause heavy supply loads which may pull down the regulator output voltage Always check that the power supplies are free of ac oscillations using an oscilloscope All plug in modules use the 5 V backplane supply Some plug in modules generate their own local powe...

Page 169: ... shows PASS for five seconds and the instrument returns to the last measurement function Plug in Module Self Test No user self test exists for the plug in modules The plug in modules perform their own self test when power is applied Additionally the mainframe checks two way communication with all plug in modules at power on Each plug in module also performs error checking at regular intervals duri...

Page 170: ...alue in the ADC slope counters A failure is detected when a sync interrupt is not recognized and a subsequent time out occurs 604 A D slope convergence failed The input amplifier is configured to the measure zero MZ state in the 10 V range This test checks whether the ADC integrator produces nominally the same number of positive and negative slope decisions 10 during a 20 ms interval 605 Cannot ca...

Page 171: ...mV range The dc amplifier gain is set to X100 The measure customer MC input is connected to the internal TSENSE source which produces 0 6 volts A 20 ms ADC measurement is performed and checked for a overload response 612 Ohms 500 nA source failed This test configures to the 10 V dc range with the internal 10 M 100 1 divider A4U102 connected across the input the 500 nA Ohms current source is connec...

Page 172: ...ent source is connected to produce a nominal 5 V signal A 20 ms ADC measurement is performed and the result is checked against a limit of 10 mV to 70 mV at the output of the rms to dc converter 619 Ohms 1 mA source failed This test configures the 10 V range with the internal 1 0 M 100 1 divider A4U102 connected across the input The 1 mA current source is connected A 20 ms ADC measurement is perfor...

Page 173: ...rge amplifier voltage offset is calculated The A1U205 DAC output is set to about 1 5 volts and the precharge offset is measured again The gain of the offset adjustment is calculated This test assures a precharge amplifier offset is achievable 624 Unable to sense line frequency This test checks that the LSENSE logic input to A1U205 is toggling If no logic input is detected the meter will assume a 5...

Page 174: ...eriods at temperatures above 40 C with the ac power removed The battery is not used whenever the ac line power is applied to the instrument The internal battery may be monitored to verify operation as described below A low battery will typically give errors when ac line power is removed and then re applied Any of the following errors may indicate a low battery 201 Memory lost stored state 202 Memo...

Page 175: ...ove AC line power 2 Remove the cover see page 174 If installed remove the Internal DMM A4 assembly see page 176 3 Turn the instrument over and unsolder the three battery terminals from the bottom of the circuit board Use proper through hole soldering techniques and equipment Remove the battery and dispose of properly 4 Install solder and verify the new battery Battery Battery 6 Chapter 6 Service B...

Page 176: ...mum of 6 in lbs 0 68 newton meter W A R N I N G SHOCK HAZARD Only service trained personnel who are aware of the hazards involved should remove the instrument covers Dangerous voltages may be encountered with the instrument covers removed C A U T I O N To prevent damage to the fan do not over tighten the fan screws Torx is a registered trademark of Camcor Textron Inc Chapter 6 Service Disassembly ...

Page 177: ...General Disassembly 4 3 2 1 6 Chapter 6 Service Disassembly 175 ...

Page 178: ...Internal DMM Disassembly 3 2 1 Chapter 6 Service Disassembly 176 ...

Page 179: ...e When reassembling the front panel be sure to route the front panel cable as shown above Do not allow the front panel cable to touch the digital ribbon cable Maximum Torque 6 in lbs 0 68 n m 2 1 6 Chapter 6 Service Disassembly 177 ...

Page 180: ...Additional Chassis Disassembly 1 2 Chapter 6 Service Disassembly 178 ...

Page 181: ...Plug In Module Disassembly Needle nose Pliers 6 Chapter 6 Service Disassembly 179 ...

Page 182: ...180 ...

Page 183: ...7 Replaceable Parts 7 ...

Page 184: ...rer s List on page 216 Parts are listed in alphanumeric order according to their schematic reference designators The parts lists include a brief description of the part with applicable Agilent part numbers and manufacturer part number To Order Replaceable Parts You can order replaceable parts from Agilent using the Agilent part number or directly from the manufacturer using the manufacturer s part...

Page 185: ...LE FRONT 02362 34401 45011 MP2 34401 86010 1 KIT BUMPERS COVER 02362 34401 86010 MP3 34970 00101 1 CARD CAGE LEFT 02362 34970 00101 MP4 34970 00102 1 CARD CAGE RIGHT 02362 34970 00102 MP5 34970 40201 1 FRNT PANEL ASSY 02362 34970 40201 MP6 34970 44111 2 COVER PLATE PLASTIC 02362 34970 44111 MP7 34970 49321 1 WINDOW FRONT 02362 34970 49321 MP8 34970 68501 1 FAN 02362 34970 68501 MP9 34970 86201 1 P...

Page 186: ...T_A C181 0160 8367 1 CAP FXD 1uF 10 10 V CER 06352 C2012X5R1A105K C183 0160 5947 6 CAP FXD 1000pF 50 V 02010 08055C102KATA C201 0160 7798 CAP 0 1UF 50V 10 X7R 0805 02010 08055C104KAT_A C204 C205 0160 7798 CAP 0 1UF 50V 10 X7R 0805 02010 08055C104KAT_A C209 0160 7798 CAP 0 1UF 50V 10 X7R 0805 02010 08055C104KAT_A C212 C214 0160 7798 CAP 0 1UF 50V 10 X7R 0805 02010 08055C104KAT_A C218 0160 5945 CAP ...

Page 187: ... SGL TO 220 CS 07179 576802B04000 E105 E106 1205 0686 HEAT SINK SGL TO 220 CS 07179 576802B04000 E120 E124 9170 1584 CORE SHLD BEAD 09808 25Z0805 0SR E201 9170 1584 CORE SHLD BEAD 09808 25Z0805 0SR E202 E203 9170 1506 2 CORE MAGNETIC 06352 HF50ACB201209 E204 9170 1584 CORE SHLD BEAD 09808 25Z0805 0SR E206 E208 9170 1584 CORE SHLD BEAD 09808 25Z0805 0SR E301 9170 1663 1 CORE SHIELDING BEAD 11702 FB...

Page 188: ...C08052A0R00JL R114 R115 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R118 R120 0699 3053 31 RESISTOR 100K 1 1W TKF TC 0 100 02995 9C08052A1003FKR R130 R131 0699 3034 17 RESISTOR 1K 1 1W TKF TC 0 100 06337 9C08052A1001FKR R132 0699 3053 RESISTOR 100K 1 1W TKF TC 0 100 02995 9C08052A1003FKR R133 0699 2643 RESISTOR 0 5 1W TKF TC 0 300 06337 9C08052A0R00JL R183 0699 3067 1 RESISTOR 1...

Page 189: ...99 3077 1 RESISTOR 1M 1 1W TKF TC 0 100 06337 9C08052A1004FKR R314 0699 3035 1 RESISTOR 1 47K 1 1W TKF TC 0 100 06337 9C08052A1471FKR R315 0699 3034 RESISTOR 1K 1 1W TKF TC 0 100 06337 9C08052A1001FKR R330 R331 0699 2977 RESISTOR 681 1 1W TKF TC 0 100 06337 9C08052A6810FKR R340 0699 2965 RESISTOR 46 4K 1 1W TKF TC 0 100 06337 9C08052A4642FKR R350 0699 3058 RESISTOR 100 1 1W TKF TC 0 100 06337 9C08...

Page 190: ...2 3 IC SCHMITT TRIG CMOS ACT INV HEX 02037 MC74ACT14DR2 U305 34970 88803 1 PROG PART LOWER LEVEL 1821 1876 02362 34970 88803 U306 1820 7312 IC SCHMITT TRIG CMOS ACT INV HEX 02037 MC74ACT14DR2 U307 1820 6863 1 IC UART WITH FIFO 03406 PC16550DV U308 1820 6823 1 IC INTERFACE DRVR RCVR CMOS TPL 888 BIT 02037 MC145407DWR2 U309 1822 0639 1 IC HPIB CONTROLLER 03677 14063 501 U310 1820 6175 1 IC INTERFACE...

Page 191: ...A2612FKR R2 0699 3039 1 RESISTOR 2 61K 1 1W TKF TC 0 100 06337 9C08052A2611FKR R3 R4 0699 3053 2 RESISTOR 100K 1 1W TKF TC 0 100 02995 9C08052A1003FKR R5 R7 0699 3051 4 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R8 R10 0699 3058 3 RESISTOR 100 1 1W TKF TC 0 100 06337 9C08052A1000FKR R11 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR U1 34970 88812 1 PGM D 1820 8905 8 BIT ...

Page 192: ...10K P101 P103 1252 8025 3 CONN DIN VERT MALE 48PIN 02010 16 8477 048 001 025 P104 1252 3442 1 CONN POST TYPE 100 PIN SPCG 6 CONT 03418 705 55 0075 P105 1252 3441 1 CONN DIS RA M SPIN SMC 03418 705 55 0074 P106 34970 61611 1 BACKPLANE CABLE 00003 34970 61611 R101 0699 1327 1 RESISTOR 1M 1 125W TKF TC 0 100 04935 9C12063AFKR R160 0699 4820 1 RESISTOR 220 5 AXIA1 5W TC 0 200PPM 05524 RNX 3 8N220RJM R...

Page 193: ...13 89 1 5 kV CER C0G 02010 MA30SA1R8CAA C303 0160 6098 1 CAP FXD 680pF 5 50 V CER C0G 02010 12065A681JATA C304 0160 5973 1 CAP FXD 6 8pF 50 V 02010 08055A6R8DATA C305 0160 6096 1 CAP FXD 470pF 5 50 V CER C0G 02010 12065A471JATA C306 0160 5972 1 CAP FXD 5 6pF 8 93 50 V CER C0G 02010 08051A5R6DATA C307 0160 5967 CAP FXD 100pF 5 50 V CER C0G 03292 0160 5967 C308 C310 0160 6497 CAP FXD 0 1uF 25 V 0201...

Page 194: ...AL 70V 100MA T0 236AA 02910 BAV99 K102 K104 0490 1896 3 RLY 2C 2A 220V 60WATT 3V COIL LATCHING 12921 G6SU 2 DC3 L101 9140 1244 2 INDUCTOR 1MH 5 3 4W MMX4 8LG MM Q 30 05524 IMC 18121000 0UH 5 L102 9140 1238 3 INDUCTOR 10UH 5 2 8W MMX3 4LG MM Q 30 02366 KL32TE100J L106 9140 1244 INDUCTOR 1MH 5 3 4W MMX4 8LG MM Q 30 05524 IMC 18121000 0UH 5 L110 L111 9140 1238 INDUCTOR 10UH 5 2 8W MMX3 4LG MM Q 30 02...

Page 195: ...6 RESISTOR 24K 5 1W TKF TC 0 200 05524 CRCW2512243J R184 0699 4821 RESISTOR 75K 5 2512 200V 1W TC 200 05524 CRCW2512753J R196 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R197 0699 3049 1 RESISTOR 8 25K 1 1W TKF TC 0 100 06337 9C08052A8251FKR R198 0699 3034 1 RESISTOR 1K 1 1W TKF TC 0 100 06337 9C08052A1001FKR R201 0699 3404 1 RESISTOR 400K 1 125W TF TC 0 2 06337 5023ZT400K0F R20...

Page 196: ...C12063AFKR R420 0699 1389 1 RESISTOR 8 25K 1 125W TKF TC 0 100 06337 9C12063A8251FKR R421 0699 1318 RESISTOR 1K 1 125W TKF TC 0 100 04935 9C12063AFKR R422 0699 1360 1 RESISTOR 46 4 1 125W TKF TC 0 100 04935 9C12063AFKR R430 0699 1503 1 RESISTOR 05 100 TKF 02995 9C12063A00R0JLR R440 0699 1406 RESISTOR 42 2K 1 125W TKF TC 0 100 04935 9C12063AFKR R441 0699 1394 1 RESISTOR 14 7K 1 125W TKF TC 0 100 04...

Page 197: ...37JR U309 1820 5790 2 IC SHF RGTR CMOS HC SYNCHRO SERIAL IN 02910 74HC4094D U310 1826 1572 1 IC COMPARATOR PRCN DUAL 8 PIN PLSTC SOIC 02910 LM393D U311 1820 5790 IC SHF RGTR CMOS HC SYNCHRO SERIAL IN 02910 74HC4094D U312 1826 4084 IC OP AMP ANLG SINGLE 8 PIN PLSTC SOIC 03285 AD825AR U400 U401 1826 2420 IC OP AMP LP DUAL 8 PIN PLSTC SOIC 03285 AD706JR U402 1826 1991 1 IC OP AMP HS SINGLE 8 PIN PLST...

Page 198: ...04 1902 1574 3 DIODE ZNR 6 8V 6 TO 236 SOT 23 02910 BZX84C6V8 CR106 1902 1574 DIODE ZNR 6 8V 6 TO 236 SOT 23 02910 BZX84C6V8 CR107 1906 0291 24 DIODE DUAL 70V 100MA T0 236AA 02910 BAV99 CR201 CR220 1906 0291 DIODE DUAL 70V 100MA T0 236AA 02910 BAV99 CR221 CR222 1906 0395 DIODE DUAL 75V TO 253 02910 BAS28 CR320 CR322 1906 0291 DIODE DUAL 70V 100MA T0 236AA 02910 BAV99 CR323 CR324 1906 0395 DIODE DU...

Page 199: ...PN SI SOT 23 TO 236AB 12125 KST2222A Q211 1853 0525 TRANSISTOR PNP SI TO 236AA PD 200MW 02237 MMBT2907 Q212 Q213 1854 1053 TRANSISTOR NPN SI SOT 23 TO 236AB 12125 KST2222A Q214 1853 0525 TRANSISTOR PNP SI TO 236AA PD 200MW 02237 MMBT2907 Q215 1854 1053 TRANSISTOR NPN SI SOT 23 TO 236AB 12125 KST2222A Q216 Q217 1853 0525 TRANSISTOR PNP SI TO 236AA PD 200MW 02237 MMBT2907 Q218 1854 1053 TRANSISTOR N...

Page 200: ... 3970 RES 10K 1 063W 06337 232270461003 R114 R115 0699 3067 2 RESISTOR 14 7K 1 1W TKF TC 0 100 06337 9C08052A1472FKR R117 R121 0699 2973 5 RES 215 FIXED THIN FILM 06337 9C08052A2150FKR R147 0699 3051 49 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R148 0699 3077 1 RESISTOR 1M 1 1W TKF TC 0 100 06337 9C08052A1004FKR R149 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R150 R1...

Page 201: ...D 2 INP 02037 MC74ACT132D U150 1818 6821 1 FRAM SERIAL 4K FMZ4C04 S 14543 FM24C04 S U151 U152 1821 4861 2 IC INTERFACE MISC 12186 DS75S XU101 1200 1592 1 SOCKET IC PLCC 44 CONT SQUARE J LEAD 01380 3 822275 1 Y101 0410 4009 1 CERO RES 12MHZ 1 0 8 00830 PBRC 12 0BRN07 7 Chapter 7 Replaceable Parts 34901A 20 Channel Multiplexer 199 ...

Page 202: ...TO 236 SOT 23 02910 BZX84C6V8 CR106 1902 1574 DIODE ZNR 6 8V 6 TO 236 SOT 23 02910 BZX84C6V8 CR107 1906 0291 1 DIODE DUAL 70V 100MA T0 236AA 02910 BAV99 CR201 CR210 1906 0395 DIODE DUAL 75V TO 253 02910 BAS28 CR211 1902 1572 1 DIODE ZNR 15V 5 TO 236 SOT 23 PD 35W 02910 BZX84 C15 J101 1252 8024 1 CONN POST TYPE 100 PIN SPCG MTG END 05525 26 8477 048 002 025 J401 J403 0360 2624 3 CONN TERMINAL BK RA...

Page 203: ...W TKF TC 0 100 06337 9C08052A1004FKR R149 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R150 R151 0699 2973 RES 215 FIXED THIN FILM 06337 9C08052A2150FKR R155 0699 3947 RESISTOR 1K 1 063W TKF TC 0 200 06337 9C0603A1001FL R157 0699 3947 RESISTOR 1K 1 063W TKF TC 0 200 06337 9C0603A1001FL R160 R162 0699 2973 RES 215 FIXED THIN FILM 06337 9C08052A2150FKR R166 R168 0699 3034 RESISTOR ...

Page 204: ...INAL BK RA FEM 12PIN 13389 M1 040 0001 9 K208 0490 1896 20 RLY 2C 2A 220V 60WATT 3V COIL LATCHING 12921 G6SU 2 DC3 K301 K320 0490 1896 RLY 2C 2A 220V 60WATT 3V COIL LATCHING 12921 G6SU 2 DC3 L101 L102 9170 1663 2 CORE SHIELDING BEAD 11702 FBMH4532HM132 T L105 9170 1584 4 CORE SHLD BEAD 09808 25Z0805 0SR L109 L111 9170 1584 CORE SHLD BEAD 09808 25Z0805 0SR MP1 34901 60001 KIT MODULE COVER CASE 0236...

Page 205: ... TC 0 100 06337 9C08052A1002FKR R114 0699 2973 6 RESISTOR 215 1 1W TKF TC 0 100 06337 9C08052A2150FKR R115 0699 3067 RESISTOR 14 7K 1 1W TKF TC 0 100 00746 MCR10 F X 1472 R116 R118 0699 2973 RESISTOR 215 1 1W TKF TC 0 100 06337 9C08052A2150FKR R120 R121 0699 2973 RESISTOR 215 1 1W TKF TC 0 100 06337 9C08052A2150FKR R122 R127 0699 3034 RESISTOR 1K 1 1W TKF TC 0 100 00746 MCR10 F X 1001 R140 0699 30...

Page 206: ...A FEM 4 PIN 13389 M1 040 0001 8 K101 K108 0490 1896 32 RLY 2C 2A 220V 60WATT 3V COIL LATCHING 12921 G6SU 2 DC3 K201 K208 0490 1896 RLY 2C 2A 220V 60WATT 3V COIL LATCHING 12921 G6SU 2 DC3 K301 K308 0490 1896 RLY 2C 2A 220V 60WATT 3V COIL LATCHING 12921 G6SU 2 DC3 K401 K408 0490 1896 RLY 2C 2A 220V 60WATT 3V COIL LATCHING 12921 G6SU 2 DC3 L101 L102 9140 1782 2 INDUCTOR 4 7uH 10 10 06352 NLC565050T 4...

Page 207: ... 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R131 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R133 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R141 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R143 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R147 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R148 0699 3053 ...

Page 208: ...052A1002FKR R273 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R281 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R283 R284 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R287 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR U101 34903 88801 1 PROGMD 1821 1876 MCU N87C52 02632 34903 88801 U102 U103 1820 5752 2 IC FF CMOS HC D TYPE POS...

Page 209: ... 1584 5 CORE SHLD BEAD 09808 25Z0805 0SR L170 L171 9140 1782 2 INDUCTOR 4 7uH 10 10 06352 NLC565050T 4R7K MP1 34901 60001 KIT MODULE COVER CASE 02362 34901 60001 P1 P10 1250 1377 10 CONNECTOR RF SMB JACK PC W O STDF 50 OHM 03621 5164 5003 09 For 34906A 75Ω RF Multiplexer P1 P10 1250 2339 10 CONNECTOR RF SMB JACK PC W O STDF 75 OHM 03621 131 8701 301 Q101 1854 1053 12 TRANSISTOR NPN SI SOT 23 TO 23...

Page 210: ... 1 RESISTOR 100K 1 1W TKF TC 0 100 02995 9C08052A1003FKR R149 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R151 R152 0699 3034 7 RESISTOR 1K 1 1W TKF TC 0 100 06337 9C08052A1001FKR R154 0699 3034 RESISTOR 1K 1 1W TKF TC 0 100 06337 9C08052A1001FKR R155 0699 3061 1 RESISTOR 261 1 1W TKF TC 0 100 06337 9C08052A2610FKR R156 R158 0699 3067 3 RESISTOR 14 7K 1 1W TKF TC 0 100 06337 9C0...

Page 211: ...010 08055C103KATA C401 0160 7798 CAP 0 1UF 50V 10 X7R 0805 02010 08055C104KAT_A C402 0160 5945 CAP FXD 0 01uF 50 V 02010 08055C103KATA C502 C505 0160 7798 CAP 0 1UF 50V 10 X7R 0805 02010 08055C104KAT_A C506 0160 5945 CAP FXD 0 01uF 50 V 02010 08055C103KATA C507 C508 0160 7798 CAP 0 1UF 50V 10 X7R 0805 02010 08055C104KAT_A C510 0180 4116 1 CAP FXD 22uF 20 V TA 00039 NRD226M20R12 C511 0160 6218 1 CA...

Page 212: ...LD BEAD 09808 25Z0805 0SR L201 L202 9140 1782 2 INDUCTOR 4 7uH 10 10 06352 NLC565050T 4R7K L501 L502 9140 1638 2 INDUCTOR 10UH 10 10 2 7W MMX3 4LG MM 06352 NLC322522T 100K L510 9140 2152 1 L SMT 22uH 20 1 32A 05524 LPE 4841 220UH 20 B L515 L516 9140 1238 2 INDUCTOR 10UH 5 2 8W MMX3 4LG MM Q 30 02366 KL32TE100J MAL510 34907 00601 1 SHIELD 02631 34907 00601 MAP102 1258 0209 1 JUMPER REMOVABLE TWO PO...

Page 213: ... 1 1W TKF TC 0 100 06337 9C08052A8251FKR R148 0699 3053 RESISTOR 100K 1 1W TKF TC 0 100 02995 9C08052A1003FKR R151 R153 0699 2643 3 RESISTOR 0 5 1W TKF TC 0 300 06337 9C08052A0R00JL R166 R168 0699 3034 RESISTOR 1K 1 1W TKF TC 0 100 06337 9C08052A1001FKR R205 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR R211 R214 0699 2973 RESISTOR 215 1 1W TKF TC 0 100 06337 9C08052A2150FKR R215 ...

Page 214: ...T TRIG CMOS ACT INV HEX 02037 MC74ACT14DR2 U104 1820 4220 1 IC GATE CMOS HC OR QUAD 2 INP 02910 74HC32D U105 U106 1820 5752 6 IC FF CMOS HC D TYPE POS EDGE TRIG COM 02910 74HC574D U107 1821 0055 1 IC SCHMITT TRIG CMOS ACT NAND QUAD 2 INP 02037 MC74ACT132D U108 1826 2116 1 IC OP AMP LP DUAL 8 PIN PLSTC SOIC 02037 MC34182D U109 1826 1594 1 IC COMPARATOR GP SINGLE 8 PIN PLSTC SOIC 04078 LM311D U110 1...

Page 215: ... 6 8V 6 TO 236 SOT 23 02910 BZX84C6V8 CR106 1902 1574 DIODE ZNR 6 8V 6 TO 236 SOT 23 02910 BZX84C6V8 CR107 1906 0291 22 DIODE DUAL 70V 100MA T0 236AA 02910 BAV99 CR201 CR220 1906 0291 DIODE DUAL 70V 100MA T0 236AA 02910 BAV99 CR221 CR222 1906 0395 DIODE DUAL 75V TO 253 02910 BAS28 CR223 1906 0291 DIODE DUAL 70V 100MA T0 236AA 02910 BAV99 CR224 CR225 1906 0395 DIODE DUAL 75V TO 253 02910 BAS28 J101...

Page 216: ...53 0525 TRANSISTOR PNP SI TO 236AA PD 200MW 02237 MMBT2907 Q224 1854 1053 TRANSISTOR NPN SI SOT 23 TO 236AB 12125 KST2222A Q225 1853 0525 TRANSISTOR PNP SI TO 236AA PD 200MW 02237 MMBT2907 Q226 Q227 1854 1053 TRANSISTOR NPN SI SOT 23 TO 236AB 12125 KST2222A Q228 1853 0525 TRANSISTOR PNP SI TO 236AA PD 200MW 02237 MMBT2907 Q229 1854 1053 TRANSISTOR NPN SI SOT 23 TO 236AB 12125 KST2222A Q230 1853 05...

Page 217: ...STOR 215 1 063W TKF TC 0 200 06337 9C0603A2150FL R201 R233 0699 3051 RESISTOR 10K 1 1W TKF TC 0 100 06337 9C08052A1002FKR U101 34901 88822 1 PRGM D 1821 1876 02632 34901 88822 U102 U105 1820 5752 4 IC FF CMOS HC D TYPE POS EDGE TRIG COM 02910 74HC574D U109 1820 5941 1 IC DCDR DEMUXR CMOS ACT BIN 8 TO 1 LINE 03406 74ACT138SC U141 1821 0055 1 IC SCHMITT TRIG CMOS ACT NAND QUAD 2 INP 02037 MC74ACT132...

Page 218: ...RESISTIVE CO BOONE NC US 02883 TEMIC SILICONIX INC SANTA CLARA CA US 02910 PHILIPS SEMICONDUCTORS EINDHOVEN NL 03038 INTL RECTIFIER CORP LOS ANGELES CA US 03285 ANALOG DEVICES INC NORWOOD MA US 03287 GENERAL SEMICONDUCTOR IND INC TEMPE AZ US 03292 CORNING GLASS WORKS CORNING NY US 03406 NATIONAL SEMICONDUCTOR CORP SANTA CLARA CA US 03418 MOLEX INC LISLE IL US 03677 AMERICAN MICRO SYSTEMS INC SANTA...

Page 219: ... US 09235 FOX ELECTRONICS FT MEYERS FL US 09454 PRECISION RESISTIVE PRODS INC MEDIAPOLIS IA US 09808 STEWARD INC CHATTANOOGA TN US 09891 KOA CORPORATION INA SHI NAGANO KEN JP 09939 MURATA ELECTRONICS NORTH AMERICA INC LONG BEACH CA US 10421 EPSON AMERICA INC TORRENCE CA US 10858 LINEAR TECHNOLOGY CORP MILPITAS CA US 11302 MAXIM INTEGRATED PRODUCTS SUNNYVALE CA US 11484 JOSLYN ELECTRONIC SYSTEMS DI...

Page 220: ...Chapter 7 Replaceable Parts Manufacturer s List 218 ...

Page 221: ...8 Schematics 8 ...

Page 222: ...34901A 20 Channel Multiplexer Component Locator on page 238 34901A 20 Channel Multiplexer Schematics starting on page 239 34902A 16 Channel Multiplexer Component Locator on page 244 34902A 16 Channel Multiplexer Schematics starting on page 245 34903A 20 Channel Actuator Component Locator on page 249 34903A 20 Channel Actuator Schematics starting on page 250 34904A 4x8 Matrix Component Locator on p...

Page 223: ...Agilent 34970A System Block Diagram 221 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 224: ...34970 66501 sheet 1 of 2 A1 Component Locator top 222 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 225: ...34970 66501 sheet 2 of 2 A1 Component Locator bottom 223 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 226: ...34970 66501 sheet 1 of 4 A1 Power Supply Schematic 224 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 227: ...34970 66501 sheet 2 of 4 A1 Floating Logic Schematic 225 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 228: ...0 66501 sheet 3 of 4 A1 Earth Referenced Logic Schematic 226 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 229: ...34970 66501 sheet 4 of 4 A1 Memory Schematic 227 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 230: ...02 sheet 1 of 1 A2 Display and Keyboard Component Locator top 228 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 231: ...70 66502 sheet 1 of 1 A2 Display and Keyboard Schematic 229 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 232: ...970 66503 sheet 1 of 1 A3 Backplane Component Locator 230 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 233: ...34970 66503 sheet 1 of 1 A3 Backplane Schematic 231 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 234: ... 66504 sheet 1 of 2 A4 Internal DMM Component Locator top 232 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 235: ...6504 sheet 2 of 2 A4 Internal DMM Component Locator bottom 233 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 236: ...s indicating the cycle count on backplane relays 1 2 and 3 which correspond to relays K102 K103 and K104 respectively See chapter 5 in the User s Guide for more information Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 237: ...04 sheet 2 of 4 A4 Input Amplifier and Ohms Current Schematic 235 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 238: ...34970 66504 sheet 3 of 4 A4 AC Schematic 236 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 239: ...34970 66504 sheet 4 of 4 A4 A D Converter Schematic 237 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 240: ...1 sheet 1 of 1 34901A 20 Channel Multiplexer Component Locator 238 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 241: ...66501 sheet 1 of 5 34901A 20 Channel Multiplexer Schematic 239 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 242: ...66501 sheet 2 of 5 34901A 20 Channel Multiplexer Schematic 240 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 243: ...66501 sheet 3 of 5 34901A 20 Channel Multiplexer Schematic 241 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 244: ...66501 sheet 4 of 5 34901A 20 Channel Multiplexer Schematic 242 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 245: ...66501 sheet 5 of 5 34901A 20 Channel Multiplexer Schematic 243 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 246: ...1 sheet 1 of 1 34902A 16 Channel Multiplexer Component Locator 244 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 247: ...66501 sheet 1 of 4 34902A 16 Channel Multiplexer Schematic 245 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 248: ...66501 sheet 2 of 4 34902A 16 Channel Multiplexer Schematic 246 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 249: ...66501 sheet 3 of 4 34902A 16 Channel Multiplexer Schematic 247 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 250: ...66501 sheet 4 of 4 34902A 16 Channel Multiplexer Schematic 248 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 251: ...01 sheet 1 of 1 34903A 20 Channel Actuator Component Locator 249 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 252: ... 66501 sheet 1 of 3 34903A 20 Channel Actuator Schematic 250 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 253: ... 66501 sheet 2 of 3 34903A 20 Channel Actuator Schematic 251 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 254: ... 66501 sheet 3 of 3 34903A 20 Channel Actuator Schematic 252 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 255: ...4 66501 sheet 1 of 1 34904A 4x8 Matrix Component Locator 253 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 256: ...34904 66501 sheet 1 of 3 34904A 4x8 Matrix Schematic 254 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 257: ...34904 66501 sheet 2 of 3 34904A 4x8 Matrix Schematic 255 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 258: ...34904 66501 sheet 3 of 3 34904A 4x8 Matrix Schematic 256 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 259: ...6 66501 sheet 1 of 1 34905A 34906A RF Multiplexer Component Locator 257 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 260: ...34906 66501 sheet 1 of 2 34905A 34906A RF Multiplexer Schematic 258 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 261: ...34906 66501 sheet 2 of 2 34905A 34906A RF Multiplexer Schematic 259 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 262: ...01 sheet 1 of 1 34907A Multifunction Module Component Locator 260 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 263: ... 66501 sheet 1 of 5 34907A Multifunction Module Schematic 261 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 264: ... 66501 sheet 2 of 5 34907A Multifunction Module Schematic 262 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 265: ... 66501 sheet 3 of 5 34907A Multifunction Module Schematic 263 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 266: ... 66501 sheet 4 of 5 34907A Multifunction Module Schematic 264 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 267: ... 66501 sheet 5 of 5 34907A Multifunction Module Schematic 265 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 268: ...1 sheet 1 of 1 34908A 40 Channel Multiplexer Component Locator 266 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 269: ...66501 sheet 1 of 3 34908A 40 Channel Multiplexer Schematic 267 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 270: ...66501 sheet 2 of 3 34908A 40 Channel Multiplexer Schematic 268 Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches Fold Here Fold Here Binder Edge LH Page Õ Foldout Cut Size 9 x 19 inches ...

Page 271: ...66501 sheet 3 of 3 34908A 40 Channel Multiplexer Schematic 269 Fold Here Fold Here Fold Here Fold Here Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches Ô Binder Edge RH Page Foldout Cut Size 9 x 19 inches ...

Page 272: ......

Page 273: ...5A 34906A 34907A System Related Operations Display State Error Queue Stored States Factory Reset State DC Volts Autorange 51 2 digits 1 PLC 10 MΩ fixed for all DCV ranges Automatic Delay Count Not Reset When Read Rising Edge Factory Reset State Empty All Readings are Cleared All Statistical Data is Cleared Immediate Front Panel 10 Seconds Remote Immediate Front Panel Continuous Remote 1 Scan Sweep...

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