Page 1: ...MODEL 3484A MULTIFUNCTION UNIT ...
Page 2: ...OPERATING AND SERVICE MANUAL MODEL 3484A MULTIFUNCTION UNIT hp Part No 03484 90000 Serials Prefixed 975 Copyright Hewlett Packard Company 1970 P O Box 301 Loveland Colorado 80537 U S A Printed JULY 1970 ...
Page 3: ...f addressed card below no postage necessary when mailed in the United States Type or print your full name and address in the spaces provided Be sure to enter the full serial number of the instrument The card will be used as a window address card in order to be sure the manual reaches the proper person The final manual will not be shipped until the address card is received INSTRUCTION MANUAL REQUES...
Page 4: ...0STA0t STAM N C f SSA l V Ill M AILED 1 N UNITED STATES POSTAGE WILL BE PAID BY l S T CLAS f_ M I T NO YT HEWLETT PACKARD COMPANY Cuatomer Service Center 333 Logue Avenue Mou ntaln V iew Callf orn la 9 40 40 I I 1 l l I I j I I ...
Page 5: ... 3 46 AC Voltage Measurements Option 043 3 7 Section III Cont d Page 3 47 3 48 3 51 3 52 3 53 3 54 Section AC or DC Coupled Measurement 3 7 Maximum Input Voltages 3 7 Response Time 3 7 Measuring Speed 3 7 Autoranging Time 3 7 AC Voltage Measurement Procedure 3 7 Page IV THEORY OF OPERATION 4 1 4 1 4 2 4 3 4 4 4 5 4 10 4 11 4 12 4 16 4 17 4 23 4 26 4 27 4 31 4 32 4 45 4 49 4 52 Section Introduction...
Page 6: ...ote Option Installation 2 3 2 3 Location of Switch Limit Stops 2 3 3 1 Front and Rear Panel 3 0 3 2 External Trigger Connections 3 2 3 3 Remote Connector JJ4 3 3 3 4 Isolated Remote Program Sequence 3 4 3 5 Guard Connection 3 5 4 1 Simplified Block Diagram 4 1 4 2 Simplified Diagram DC Amplifier 4 3 4 3 Autorange Control Circuits 4 4 4 4 Simplified Range Register Diagram 4 5 4 5 Remote Selection o...
Page 7: ...tion 043 allows the Model 3484A to make true rms ac voltage measurements on five ranges of 100 mV 1000 mY 34114A MULTIFUNCTION UNIT FUNCTION RANGE SAMP RATE HOU Jli T111a ZCRO JOY l OOV and IOOOV full scale with up to 50 overrange capability Range may be selected manually automatically or remotely This option is available for field installation as hp Model 11 I 53A True RMS AC Converter Assembly 1...
Page 8: ...00 V 1000 V Manual Automatic or Remote Upranges at 140 of range Downranges at 10 of range Automatic 0 01 of reading 0 01 of range 100 mV Range 0 01 of reading 0 02 of range All other ranges 0 01 of reading 0 01 of range 100 mV Range Filter Out 0 001 of reading 0 0005 of range C Filter A or B 0 001 of reading 0 0015 of range C All other ranges 0 001 of reading 0 0005 of range 0 c 950 microseconds V...
Page 9: ... Between LOW and GUARD terminals Between GUARD and Chassis 100 mV 1000 mV8nd 10 V ranges Greater than 101 ohms 100 V 1000 V ranges 10 megohms 0 1 Greater than 80 dB 50 to 60 Hz Filter out Greater than 80 dB Filter A Greater than 110 dB Filter B Greater than 160 dB Filter out 0 dB Filter A Greater than 30 dB at 50 Hz and above Filter B Greater than 80 dB at 50 Hz and above Manual or Remote Less tha...
Page 10: ... range 0 02 of reading 0 05 of range 10 megohm range 0 1 of reading 0 01 of range 1000 ohm thru 1000 kilohm ranges 0 02 of reading 0 01 of range 100 ohm range 0 02 of reading 0 05 of range 10 megohm range 0 1 of reading 0 01 of range 950 microseconds Variable from 1 to 25 per second with front panel control Front panel pushbutton 0 to 1000 per second 100 ohm t hru 100 kilohm ranges F ilt er out 1 ...
Page 11: ...nd with front panel control Front panel pushbutton 0 to 1000 per second 1 second to within 5 counts of final reading 1 second per range change 2 megohms 1 7 1 at full scale 70 1 at 10 of full scale 1500 V peak ac 10 Vdc 100 mV range 100 Vdc all other ranges 1500 V maximum ac de peak Section I DC COUPLED VAC DC 100 mV 1000 mV 10 V 100 V 1000 V Manual or Remote Upranges at 140 of range Downranges at...
Page 12: ...age 10 V or 100 V referenced to circuit common and Low side of unknown input Input Resistance 10 V Ref Range 100 kilohms 1 5 100 V Ref Range 100 kilohms 0 5 Ratio Measurement Selection Manual or Remote Ratio Range Selection Manual General Specifications Operating Temperature o0 c to 55 C Storage Temperature 40 c to 75 c Options and Accessories Available Option 041 Isolated Remote Control Requires ...
Page 13: ...re adjacent to and aligned with the coils on the other board See Figure 2 2 b Remove 3484A top and bottom guard covers MANY COMPONENTS AND AREAS WITHIN THE 3484A SHOULD NOT BE TOUCHED DIRT OR FINGERPRINTS CAN CAUSE CONTAMI NATI ON WHICH WILL DEGRADE THE OPER ATION OF THE INSTRUMENT WEAR CLEAN RUBBER OR COTTON GLOVES WHEN WORKING WITHIN THE INSTRUMENT c Remove the small printed circuit board having...
Page 14: ...of latch to release 3481A C 30272 INSTALLATION REMOVAL Model 3484A Slide drawlf in until latch is about two thirch closed Press front surftce of latch until draww is fully inserted and latch snaps into place Swing latch downward end slide drewer out of 3480A B Figure 2 1 Plug in Drawer Installation and Removal 2 2 ...
Page 15: ...t wires are kept in the same order COUNTERCLOCKWISE STOP POSITION Without Ohms j Set FUNCTION switch to VOC and remove knob k Remove FUNCTION switch mounting nut and carefully slide the switch as far as possible toward the rear of the instrument l Rotate clockwise limit stop one position clockwise as shown in Figure 2 3 Make certain that the counterclockwise stop is in the correct position If the ...
Page 16: ...umber of the instrument In any correspondence identify the instrument by model number and full serial number Model 3484A 2 8 Place instrument in original container with appro priate packing material and seal well with strong tape or metal bands Jf original container is not available one can be purchased from your nearest hp Sales and Service Office 2 9 If original container is not to be used proce...
Page 17: ...HP Archive This vintage Hewlett Packard document was preserved and distributed by www hparchive com Please visit us on the web Prepared by on line curator Tony Gerbic For FREE Distribution Only ...
Page 18: ...3484A IN HD UOV1 a II OVll MU II r 1J lt 10 Terminal switch Selects front or rear input term inals 11 Rear Input terminals 12 Remote connector Allows remote control of Range Sampling Filter or Ratio mode 3480A B Option 002 13 Ratio mode switch Permits manual or remote selection of Ratio mode 3480A B Option 002 14 Ratio Range switch Selects 10 V or 100 V reference input range 3480A B Option 002 15 ...
Page 19: ... range may be made by grounding the appro priate pin on Remote Connector JI4 If none of the range program lines is grounded the 3484A will automatically select the highest range 1000 V or 10 Mn Remote programming instructions are given in Paragraph 3 19 and Figure 3 3 shows the Remote Connector J 14 3 7 SAMPLE CONTROL 3 8 AUTOMATIC SAMPLING TI1e automatic sampling rate is variable from one sample ...
Page 20: ...additional External Trigger com mands arc blocked until after the completion of the measurement 3 17 Non delayed External Trigger When the jumper on the Range and Function Assembly A3 is connected in the OUT position the External Trigger command is applied immediately to the 3480A B Sample Generator Consequently if the time between trigger commands is less than the response time for the function a...
Page 21: ... selection of function range filtering or ratio is accomplished by single line connection to ground In addition Isolated Remote programming requ ires a ground connection to the Program Accept line JJ4 pin 14 for a minimum of SO µsec to set the selected program into the Isolated Remote circuits Program storage then allows the program lines to be returned to IILGII or open until it is desired to mak...
Page 22: ...am change is desired T 4 and TS may occur simultaneously T6 Program Flag signal goes LOW to indicate com pletion of programming An External T rigger com mand may now be applied T1 Selection of new program All desired program lines must be LOW during Program Accept Command T2 Program Accept Command to change program Minimum time between T4 and T2 is SO micro seconds Figure 34 Isolated Remote Progra...
Page 23: ... RA RB Rl R2 R3 placing the LOW and GUARD terminals at the same de voltage above ground Since there is no potential difference between these terminals current due to common mode voltages does not flow through the LOW terminal and Zl but instead flows through the GUARD terminal and Z2 and does not affect the voltage measurement 3 30 If common mode voltages are not expected to be a problem the GUARD...
Page 24: ...ION 042 3 39 FILTER SELECTION 3 6 Model 3484A Because of noise generated in the resistance under measure ment filtering may be required for quiet readings greater than 100 H2 In most cases FILTER A position should be adequate When measuring higher resistances on the 10 Mn range capacitance changes caused by movement of hands or test leads may cause changes in the measurement Selection of FILTER B ...
Page 25: ...dding an external 10 µF blocking capacitor Section III 3 48 MAXIMUM INPUT VOLTAGES 3 49 Maximum input voltages permissible in the VAC DC function are 1500 V peak ac 1500 Vdc or a total peak value ac de of 1500 V 3 50 In the VAC AC function peak ac input limit is 1500V and total peak voltage limit ac dc is 1500V The de voltage input limit on the JOO mV range is IO V and 100 Von all other ranges The...
Page 26: ... REAR terminals Connect input voltage and read measurement on front panel display Model 3484A NOTE Due to the nature of the ac converter design the display will not be zero when the input is shorted and readings below 10 of full scale may not be accurate If a measurement falls below 10 of scale switch to the next lower range I ...
Page 27: ...ly A3 INPUT LOW GUARO Al TRUE RMS AC 4 I CONVERTER OPTION CM3 A7 MA N 0 TO 1 S V REM OHMSIOC flllEll SELECTION A3 4 4 FEEDBACK ATTENUATOR The gain of the DC Amplifier is adjusted by varying the amount of feedback voltage Since the amount of feed back is inversely proportional to the feedback resistance the correct resistance for each range and function is selected by reed relays These relays are a...
Page 28: ...tput assumes level of K input LOW et s0 sets Q output HIGH LOW at R0 sets Q output HIGH FLIP FLOP A LOW at either input causes the co rresponding output to be HIGH Table 4 2 Logic Symbols INVERTER If input is HIGH output is LOW or LOW input produces HIG H ou tput FLIP FLOP A negative going input pulse changes the state of the flip flop FLI P FLOP Model 3484A A LOW at eit her input causes the co rr...
Page 29: ...eakage current in the field effect transistor lClA from causing an offset voltage at the input 4 9 When the instrument is on the 100 mV range the Overload Protection circuit limits the voltage at the gate of IClA to about 1 8 V On all other ranges the limit is about 18 V This circuit in conjunction with the resistance and zener diodes in the input circuit prevents an excessive input voltage from d...
Page 30: ...s at the end of any sample period in which the measurement is 14000 or greater or less than 1000 unless either the highest or lowest range has been reached Figure 4 3 is a diagram of the Autorange Con trol circuits 44 4 18 Downrange Control The operation of the NANO gates used in the 3484A is such that all inputs must be HIGH to produce a LOW output Conversely if any input is LOW the output will b...
Page 31: ... from HIGH to LOW The Downrange Enable line is LOW and the diode in the Rl output line is forward biased allowing the negative going transition to pass through and change the state of Flip Flop 2 In the same manner the negative going R2 output changes the state of Flip Flop 3 The Range Register content then becomes 001 and the 1000 mV range is selected Table 4 3 Range Register Content RANGE R1 R2 ...
Page 32: ...gh the RANGE switch turning on the appropriate Range Relay Driver 4 32 DELAY GENERATOR AND SAMPLE CONTROL CIRCUITS The Delay Generator provides sufficient delay time to allow 4 6 for response time of the amplifier This delay follows each autorange command and may also follow an External Trigger command At the end of the delay period a trigger command is appLied to the 3480A Btrigger circuit A bloc...
Page 33: ...utton While the Delay Flip Flop output is LOW the capacitor in the Trigger circuit is grounded Then when the Delay Flip Flop is reset a trigger command is applied to the 3480A B 4 40 Delay and External TriggerG ating 441 The Delay and External Trigger Gating circuits are shown in Figure 4 7 When the EXT TRJG DELAY jumper on Range and Function Assembly A3 is connected in the OUT position the output...
Page 34: ...he Program Input a Program Accept Command is required to accomplish isolated programming This command must go from 2 4 V or greater to 0 5 V or less for a minimum of 50 microseconds PROGRAM INPUT l 3484A 9 0319 4 47 Approximately 10 microseconds after application of a Program Accept Command t he ACC signal Figure 4 8 goes LOW resetting the flip flop output to LOW About 10 microseconds later the si...
Page 35: ...stors used in the input stage are connected as source followers to maintain a high input impedance Range switching is accomplished by varying the attenuation of the Attenuator Amplifier and the Post Attenuator 4 55 The Post Amplifier is a broadband non inverting amplifier having a fixed gain of 10 This amplifier also has a differential stage and a push pull output stage The Thermo couple Protectio...
Page 36: ... kilohm 0 005 10 kilohms 0 005 100 kilohms 0 005 1 megohm 0 005 10 megohms 0 025 DC Voltmeter Range 100 mV full Adjustments to 300 V full scale T roubloshooting Must be floating DC Differontial Resolution 0 1 mV Adjustments Voltmeter Accuracy 0 005 Troubleshooting Oscilloscope Bandwidth de to 450 kHz Troubleshooting Sensitivity 0 005 V cm Sweep 0 1 ms cm 5 0 Model 3484A RECOMMENDED MODEL hp Model ...
Page 37: ...outine performance check If the 3484A is found to be out of specifications at any point in this procedure refer to Paragraph 5 13 Adjustmenl Procedure or to the Troubleshooting Pro cedure Paragraph 5 34 DC STANDARD DIFFERENTIA L VOLTMETER hp 7408 1 1 1 5 4 VDC ACCURACY AND LINEARITY CHECK The following procedure checks the accuracy of the attenuator and the accuracy and linearity of the de amplifi...
Page 38: ...e standard to 3484A input as shown in Figure 5 2 using a 10 MQ 1 resistor for Rs The capacitor in parallel with Rs reduces the effect of noise Connect jumper across Rs Set 3484A RANGE to 10 V FUNCTION to VDC b Set de standard output to 10 000 V Table 5 2 DCV Accuracy and Linearity Check DC STANDARD 3484A DISPLAY LIMITS VOLTAGE RANGE 100 000 mV lOOmV 99 97 mV to 100 03 mV 90 000 mV 100 mV 89 97 mV ...
Page 39: ...ak common mode voltage to resultant error in reading with 1 kn unbalance in either lead a Connect a I kn resistor between 3484A HlGH and LOW terminals and connect HIGH to GUARD as shown in Figure 5 3 b Set 3484A FUNCTION to VDC RANGE to 10 V Note 3480A B display c Connect de standard to 3480A B 3484A as shown in Figure 5 3 connecting LOW side of standard output to 3480A B chassis ground A rear pan...
Page 40: ...sistor provides a low source impedance for the 3484A The ac voltmeter must be battery operated b Set 3484A FUNCTION to VDC RANGE to 10 V FILTER to A WI DE RANGE OSCILLATOR hp 200CD 3484A B 30 374 l Oµ F I VOLTMETER hp 427A a r c With oscillator turned off note 3480A B reading d Turn oscillator on and adjust frequency to SOHz Using ac voltmeter as a monitor adjust oscillator output to 7 07 Vrms I 0...
Page 41: ...k 0 005 10 000 k 2 counts 100 k 100 k 0 005 100 00 k 2 counts 1000 k 1 M 0 005 1000 0 k 2 counts 10 M 10 M 0 025 10 000 M 11 counts Section V 5 12 VAC ACCURACY OPTION 043 AC voltage accuracy checks are given in the Model 11 I53A Operating and Service Manual 5 13 ADJUSTMENT PROCEDURES 5 14 The following procedures should be performed only after it has been determined from the Performance Checks tha...
Page 42: ...t 1000 MV R39 AG CLEAN HANOL IHG IS ft OU IUO ON COMPONENTS C I OAlltOS l O ASSY S LUKAG P t THS CAUSED IY NOIEN UNlS UtO DllltT ON co l ON NTS Olt PC I OUt DS WIL l lltlDUC ACCUIUC R l llt TO UlltVICI t IAMUAL 011t PfllOPlllt HANDLING Tt CHNIOUES GUARD COVER IN PLACE I R1S0 R1 2 0 R26 0 TOP VIEW RS 0 A4 And A5 0 R1 O RS i8 a a a a 0000 RS 0 AS A2 A1 GUARD COVER REMOVED Figure 5 6 Location of Adju...
Page 43: ...it the difference between positive and negative indications h Set 3484A RANGE to 1000 mV Adjust de standard output to 999 95 mV Section V 1 Adjust l 000 mV A2R39 for display alternating betweenn 999 9 mV and 1000 0 mV j Reverse polarity of input to 999 95 mV Dis play should alternate between 999 9 mV and 1000 0 mV 1 not adjust 1000 mV A2R39 slightly to split difference between positive and negativ...
Page 44: ...n Step d f Set RANGE to I0 kn Connect test leads to JO kn resistor Adjust RI 2 IOK ADJ for display of I0 000 kn g Set RANGE to 100 kn FILTER to A Connect test leads to 100 kn resistor Adjust RS l OOK ADJ for display of 100 00 kn h Set RANGE to 1000 kn Connect test leads to 1 Mn resistor Adjust R8 lOOOK ADJ for display of 1000 0 kn i Set RANGE to 10 Mn For quiet readings at 10 Mn a FILTER B setting...
Page 45: ...n heat to component side of printed circuit board 5 28 REED REPLACEMENT 5 29 Recd switches must be handled very carefully Clean rubber gloves or finger cots must be worn or the reed must be handled by the metal leads only When replacing reed switches be careful not to bend the leads Stress on the leads may break the glass seal or cause the switch to be inoperative The leads of most replacement ree...
Page 46: ...e consistently high or low on a certain de range and the trouble cannot be corrected by performing 5 10 Model 3484A the Adjustment Procedures in Paragraph 5 13 information in the following paragraphs and Table 54 should locate the source of trouble 5 38 Attenuation is l l in the three lower ranges and I I 00 in t he I00 V and I000 V ranges If leakage resistance is present across attenuator resisto...
Page 47: ...ge Relay Driver circuit However if the problem is limited to only one function the trouble is more likely in t he range relays for that function or the Function Selection Circuits VAC AC and VAC DC functions use the same range relay circuits If the decimal and function indications are correct but the numerical display is off by a factor of 10 or 100 the trouble could be either in the range relays ...
Page 48: ...isplay is approximately one half of A 1K3 shorted 1000 mV input voltage Input resistance Paragraph 10 v 5 5 is 200 kilohms 100 v Display is zero for any input voltage Al K2 open 1000 v 100 mV Input resistance is 10 megohms A 1K2 shorted 1000 mV Paragraph 5 5 10 V All Input resistance is 10 megohms or less A7K1 A7K2 or A7K11 Ranges Paragraph 5 5 shorted All Display noise does not change regardless ...
Page 49: ...ger The Hold Circuit output goes LOW when the Delay Flip Flop is triggered and remains LOW until the flip flop is reset Tl s output prevents the 3480A B from sampling automatically The Print Command signal is HIGH during the delay period This signal is applied to a gating circuJt to prevent external triggering during this time These conditions will cause sampling to stop if the Delay Flip Flop is ...
Page 50: ...with respect to temperature coefficient specifications Therefore if one of the factory selected components on this assembly requires replacement the printed circuit assembly A2 should be returned to the factory See Paragraph 5 31 for repair and exchange information If it is necessary to replace one of these components in the field the replacement must be the same value as the original 5 60 A6R7 Th...
Page 51: ...10M0 10 k input reads 1 megohm All Linearity is bad On all ranges except AGKG open Ranges 100 ohm range readings are nearly correct for full scale inputs Readings are high toward lower end of range On 100 ohm range lower readings are nearly correct but full scale input reads high 1000 Readings are high by a factor of 10 10000 or greater 10 k n 100 kO A2K1 open 1000 kO 10M0 1 M input reads OVERLOAD...
Page 52: ...I I ...
Page 53: ...illl Jll to Port No 0370 0978 MPl 2 change 5060 949 to 0370 0979 Mf l 2 ch rnyc 5060 5950 to 0370 0980 MPl 4 change 5060 5951 to 0370 0981 MP14 change 5060 5952 to 0370 0982 MPl 4 change 5060 5953 to 0370 0983 MPl 4 change 5060 5954 to 0370 0984 Page 7 13 Replace R6 and R7 with R6A 4 45M and R6B 4 45M CHANGE 1 FOR SERIAL NO 975 00126 AND ABOVE Page 6 2 Change hp Part No of A1C1 to 0160 3623 C f xd...
Page 54: ...ilter positions may locate the faulty relay The charts below the Attenuator schematic in Figure 7 3 list relays closed in the various ranges and filter positions 13 If zero cannot be adjusted in Step 10 current is being injected into the circuit either by A2ICIA or the current compensating circuit A2Qll 13 14 If zero adjusts with amplifier input LOW lead con nected directly to INPUT LOW trouble is...
Page 55: ...lay IS I 5999 on all ranges disconnect either end of A2R52 Display should go to zero 6 Check A2CR22 for possible short 7 Reconnect A2R52 Proceed to Step 18 4 If display IS 15999 on all ranges disconnect either end of A2R55 Display should go to zero 8 Check A2CR23 for possible short 9 Reconnect A2R55 Proceed to Step 18 Disconnect jumper between A3TP4 and A3TP2 5 Disconnect amplifier input HIGH red ...
Page 56: ...ifier Assembly Using a clip lead connect test point BAL I to BAL 2 mar ed I and 2 on printed circuit board Rotate OARSE ZERO A2R7 from one extreme to t e other Display should change from 15999 to 15999 Adjust display to as near zero as possibl with A2R7 19 Replace A2CR39 20 If display can be adjusted from 15999 to 15999 disconnect jumper from BAL I to BAL 2 Connect clip lead from common connection...
Page 57: ...eading should be the same as de standard output FAILS 2 If de voltmeter reading is the same as INPUT voltage trouble is in 3480A B Refer to 3480A B Operating and Service Manual 3 Replace 3480A B Amplifier Assembly and dis connect short from Em to Sense Disconnect de voltmeter Disconnect one end of either A2CRl4 or I 5 Display should be approximately 15 990 v Section V 4 If display is correct and l...
Page 58: ...100 mV 1000 mV 10 V and 100 V CR may be shorted 10 If mV light stays on while decimal changes as follows right center center and right center and left C24 may be shorted or R3 Flip Flop IC14 may be defective 11 Disconnect input short and apply 1 5 V to INPUT terminals Should uprange to I0 V range 12 If instrument does not downrange trouble is probably in Downrange Gate Downrange Limit Gate or the ...
Page 59: ... to 500 2 mV 700 00 mV 1000 mY 699 8 mY to 700 2 mY 900 00 mV 1000 mV 899 8 mV to 9002 mY 1000 00 v 1000 mV 999 8 mV to 1000 2 mY 10 0000 v 10 v 9 998 v to 10 002 mV 9 0000 v 10 v 8 998 v to 9 002 v 7 0000 v 10 v 6 998 v to 7 002 v 5 0000 v JO V 4 998 v to 5 002 v 3 0000 v 10 v 2 999 v to 3 001 v 1 0000 v JO V 0 999 v to l 001 v 10 000 v 100 v 09 99 v to 10 01 v 100 000 v JOO V 99 98 v to 100 02 V...
Page 60: ...11 Ohmmeter Accuracy Check Range 100 n 1000 n 10 kn 100 kn 1000 kn 10 Mn Input 100 n 1 kn 10 kn 100 kn 1 Mn 10 Mn READING TEST LIMITS 100 00 n offset 7 counts 1000 0 n offset 2 counts 10 000 kn 2 counts 100 00 kn 2 counts 1000 0 kn 2 counts 10 000 Mn 11 counts ...
Page 61: ...o J her11 L lnduccor I in linear taper log loprtlhmlc 11pcr mA mllliampere s 10 J amperes MHz megahertz I0 hercz Mn megohm IO ohms met nm melll rum mrr manufacturer ms mJlllsecond mtg mounling mV millivoil s 10 3 volts µP mlcroruad s 14 micr econd s µV mlcrovoh s 10 6 voltJ my Mytu nA nanoampere s I0 91mpera NC normally closed Ne neon NO normally open NPO nepllve pOllllve zero iero temperature coe...
Page 62: ...ude coil hp 9100 3216 Coil Electromagnetic for K8 hp R1 0698 7619 1 R fxd flm 100kilohms1 5W 19647 MP312 obd 03482 01205 1 Shield Resistor hp 03482 01206 1 Heat Sink hp 0380 0474 1 Spacer bushing teflon 98291 227262 0520 0133 1 Screw RH 2 56 x 1 2 0610 0001 1 Nut Hex 2 S6 2190 0045 1 Lockwasher Helical No 2 30S0 0098 1 Washer Flat No 2 30S0 0494 1 Washer Flat teflon 3050 0495 1 Washer Shoulder tef...
Page 63: ...1902 0766 4 Diode 18 2 v 5 04713 SZ10939 257 CR16 thru CR19 1901 0025 Diode Si 03877 SG 817 obd CR20 1902 0766 Diode 18 2 v 5 04713 SZ10939 257 CR21 1901 0025 Diode Si 03877 SG 817 obd CR22 CR23 1901 0546 2 Diode Si 17856 FN1705 CR24 CR25 1901 0025 Diode Si 03877 SG 817 obd CR26 1902 0766 Diode 18 2 V 5 04713 sz10939 257 CR27 thru CR29 1901 0025 Diode Si 03877 SG 81 7 CR30 No t assigned CR31 thru ...
Page 64: ...MF 1 10 32 obd R31 Factory selected value R32 0757 0422 1 R fxd flm 909 ohms 1 1 8 W 14674 C4 obd R33 2100 0755 R var 1 kilohm 5 ww 75042 ST 100 4 R34 0698 4393 1 R fxd flm 73 2 oh ms 1 1 8 W 14674 C4 obd R35 0683 1025 R fxd comp 1 kilohm 5 1 4 W 01 121 CB1025 R36 0698 3119 1 R fxd met flm 6 98 kilohms 1 1 2 W 91637 MFF 1 2 10 obd R37 0811 2861 1 R 988 kilohms 0 05 prec ww hp R38 2100 2216 R var 5...
Page 65: ...C obd C17 0160 0154 1 C fxd mylar 0 0022 microfarad 10 200 vdcw 56289 192P22292 PTS C18 0160 0362 C fxd mica 510 pF 5 72136 RDM15F511J3C obd C19 0140 0145 C fxd mica 22 pF 5 14655 obd C20 0160 0362 C fxd mica 510 pF 5 72136 RDM1 5F511J3C obd C21 0160 0165 1 C fxd mylar 0 056 microfarad 10 200 vdcw 56289 192P56392 PTS C22 0150 0121 1 C fxd cer 0 1 micr ofarad 20 80 5 vdcw 56289 5C50B1 CML C23 0150 ...
Page 66: ...W 01121 CB2231 R6 R7 0684 1021 R fxd comp 1 kilohm 10 1 4 W 011 21 CB1021 RS 0684 1031 R fxd comp 10 kilohms 10 1 4 W 011 21 CB1031 R9 0684 1511 1 R fxdcomp 150ohms 10 1 4W 01121 CB151 1 R10 0757 0436 1 R fxd flm 4 32 kilohms 1 1 8 W 14674 C4T O obd R11 R12 0684 2231 R fxd comp 22 kilohms 10 1 4 W 01121 CB2231 R13 0698 5912 1 R fxd flm 1 20 megohm 1 1 2 W 91637 MFF 1 2 10T 1 obd R14 thru R16 0757 ...
Page 67: ... SN14656 J1 1251 2034 1 Connector Printed circuit 71785 252 10 30 300 K1 0490 0851 1 Relay Reed hp L1 thru L 13 9140 0210 13 Coil Molded choke 100 microhenries 5 82142 15 1315 12J L 14 L 15 9140 0129 2 Coil Molded choke 220 microhenries 5 82142 15 1315 20J 0 1 thru 06 1854 0071 6 TSTR Si NPN hp R1 0684 3921 1 R fxd comp 3 9 kilohms 10 1 4 W 01121 CB3921 R2 0684 8221 3 R fxd comp 8 2 kilohms 10 1 4...
Page 68: ...2 0180 0291 1 C f xd 1 0 microfarad 10 35 vdcw 90201 TAS105K035PIA C3 thru C5 0150 0093 C fxd cer 0 01 microfarad 80 20 100 vdcw 72982 Type 801 K80001 1 CR 1 thru CR6 1901 0040 12 Diode Si 30 wiv 30 mA 2 pF 2 ns 07263 FDG1088 obd CR7 1902 3149 1 Diode Breakdown 9 09 V 5 0471 3 SZ10939 170 CR8 thru CR11 1901 0040 Diode Si 30 wiv 30 mA 2 pF 2 ns 07263 FDG1088 obd CR12 1901 0546 2 Diode Si 03877 SG 8...
Page 69: ...ohms 1 1 S W 91637 CMF 1 10 32T 1 obd R17 069S 3449 2 R fxd flm 2S 7 kilohms 1 1 SW 14674 C4 7 0 obd R1S R19 06S4 1S31 7 R fxd comp 1S kilohms 10 1 4 W 01121 CB1831 R20 0698 3515 1 R fxd flm 5 9 kilohms 1 1 8 W 14674 C4 T 0 obd R21 0698 3151 1 R fxd flm 2 S7 kilohms 1 1 8 W 91637 CMF 1 10 32 T 1 obd R22 0757 0401 R fxd flm 100 ohms 1 1 8 W 91637 CMF 1 10 32T 1 obd R23 OS1 1 2S73 1 R fxd prec ww 9 ...
Page 70: ... 0417 Latch hp 0510 1033 1 Retainer Push on round 78553 C1617 010 1 obd MPS 4040 0451 1 Front panel hp 0510 1105 4 Retainer Push on round 78553 C1617 010 1 obd MP9 03484 00201 1 Subpanel Front hp 5040 4539 Bracket Mounting hp 0380 0948 Spacer hp 2190 0047 Lockwasher No 6 2360 0196 Screw FH 6 32 x 3 8 MP10 5060 5947 1 Knob Assy Terminal hp MP11 5060 5948 1 Knob Assy Filter hp MP12 5060 5949 1 Knob ...
Page 71: ...0 0016 Lockwasher 3 8 2950 0001 Nut Hex 3 8 32 S3 3100 2710 2190 0016 1 Switch Rotary filter Lockwasher 3 8 76854 obd 2950 0001 Nut Hex 3 8 32 S4 3100 2717 1 Switch Rotary function 76854 obd 2190 0016 Lockwasher 3 8 2950 0001 Nut Hex 3 8 32 S5 3101 1242 1 Switch Pushbutton 81073 46 1016 2190 0027 1 Lockwasher 1 4 3101 0126 1 Nut Switch mounting 81073 30C1023 03484 01201 1 Shield Guard top hp 2360 ...
Page 72: ...Section VI 0 0 0 0 MPI MP2 0 0 0000 S4 S2 MP7 MPl4 MPl3 MPl 2 6 12 Model 3484A 1 MP9 SI MPS MP I MP2 MP3 MPll MPIO Figure 6 1 Location of Miscellaneous Parts ...
Page 73: ...tors are shown within assem bly outlines Prefix with assembly number for com plete designator 2 Component values are shown as follows unless other wise noted Capacitance in microfarads Resistance in ohms Inductance in microhenries 3 Average value shown Optimum value selected at factory 4 Denotes assembly 5 Denotes main signal path 6 Denotes feedback path 7 s I ___ ____ Denotes screwdriver adjustme...
Page 74: ...Section VII Model 3484A I A4 And AS 0 0 0 A6 0 0 0 AJ 0000 A2 Al 0 TOP VIEW BOTTOM VIEW Figure 7 1 Location of Assemblies 7 2 ...
Page 75: ...NGE SELECTION MAN RANGE SWITCH RELAY AUTO DRIVERS __ I OHMS MANUAL FILTER FILTER SELECTION RELAY DRIVERS RANGE REMOTE AUTO RANGE REGISTER ENABLE DECODING OHMS IDELAY TIME AUTO ENABLE I AUTO ENABLE I AUTORANGECOMMAND DELAYED DELAY UPRAN GE TRIGGER GENERATOR UPRANGE ENABLE INITIATE From 34BOA B UPRANGE GATING AUTO ENABLE I AUTO RANGE COMMAND DELAY ENABLE CLOCK CONTROL____ I RANGE From 3480A B REGIST...
Page 76: ...TE DELAY GENERATOR EXTERNAL TRIGGER GATING AUTO ENABLE DELAY ENABLE PRINT COMMAND V Model 3484A fJ iaoA 0 0 15 v E1N I TO POLARITY I AMPLIFIERS I I VARIABLE I FEEDBACK SENSE I tRANGE I FUNCTION ANNUNCIATOR AND DECIMAL RANGE I DRIVERS FUNCTION RANGE RANGE AND FUNCTION BCD INFORMATION HOLD CIRCUIT TO DISPLAY CIRCUITS TO BCD 0 UTPUT CIRCUITS t igR ri MANUAL MANUAL AND GGER DELAYED _J__ TRIGGER CIRCUI...
Page 77: ...NNE CTI O N I l I I I I I I I I IN O N 00 1 1 0 V 0 a a a a ua a a cr uuuu1uuuu I I I I I l I I Al hp Part No 03482 66501 A2 hp Part No 03482 66502 Components in shaded areas are critical to operati on under vary ing t emperatu re condit ions If one of t hese co mponents is defective refer to Paragraph 5 31 10 L I A ...
Page 78: ... IO N SELECTED OU T A B FILTER RE L AYS CLOS ED A I K7 AIK5 A 2K3 A l K4 A I K5 AI K6 A2K 3 RELAY DRI VE From A3 I 14 I IOOV s FROM A30 23 I I I CRl9 IOOOV 1 1 I I FROM A30 24 I IOOOV L ____ R54 120K 30V 30V T SET TP ll V C6 200pF 30V 30V Rl5 60o4K C4 CRll 13V O I Rl9 l l BK I Cl 560pF R27 11 0 30V I CI CONNECTIONS NC 30V R30 lo62K l R28 110 CONSTANT QJRRENT SOURCE3 J o sv 20o4V l CONSTAN T CURREN...
Page 79: ...E4 6 1 111 I C7 i OI I I fl RZC 99oBK I lK5A __ J _______ __ K5B fl L4 i OIZ I CR 13 I zov r i IK4A lK48 I I f j lK6 12 J p t R26 LOW CURRENT I I R2 110 GROUND 20KM CR 39 2 o3V I VSET J2 POWER f 4 TP SU PPLY I GROUND p I 004V CR40 I I 2o3V I I 30V I HI GH I r 1 I Cl 1 C5 c 3 I z ov T 0 39 CURRENT H GROU ND I v l l I C JRRFNT f l 0 1 zov i gBz 010 I I F1Wo At o E J r 11 I CRl5 CRl6 FILTER B DRIVE _...
Page 80: ...0 0 0 0 0 888 88 8 RS 9 R9 7 e LOGIC GND OUT 0 0 0 0 0 0 0 0 0 0 0 0 0 I v u I R2 I IC4 I 1 ics 1 cs I ICIO I C6 IC I 3 I I I J1s 8 CRl5 CRl6 CRl7 d7 C Rl9 J6 L OOOOOOOOOO A IC l6 I IC l7 I 8 I IC20 IC 2 1 8 8 P12 8 0 0 I I IC22 I I IC2 3 8 8 J2 I I IC2 4 I I 8 8 8 8 CR2 1 CR22 OHM REM DC AC AC AC DC 0 0 0 0 0 IOOMV IOOOMV IOV IOOV IOOOV IOM AUTO 0 0 0 0 0 0 0 FIL B FI L A RF KOC 0 0 0 0 5 10 I I ...
Page 81: ...0 NOTE I f inslrumMI does not hove OHMS Option 0 42 posi t ion of Ronqe switch is not used 3484A J 3034 4 21 1 9 1 8 1 7 1 6 L l RANGE l Knob for inst r ument s with OHMS Opt ion COPYRIG HT 1970 BY HEWLETT PACKARD COMPAN Y IOMn RANGE IOOOV IOOOKn I RAN GE IOOV IOOKn RllNGE IOV IOKn RANGE IOOOMV IOOOnl RAN GE IOOMV IOOn RAN GE TOP VI EW 5V 7 Knob f or inst rument s wi thout OHMS Option 10 VIEW FROM...
Page 82: ...IOV IOK l IOOOMV IOOOn IOOMV IOO l RI R2 R3 0 0 0 I 0 0 0 I 0 I I 0 0 0 I I 0 I 1 0 H IG H 0 2 4V OR GREATER o LO W o sv OR LESS 23 JS t EXTERNAL EXTERNAL TRIGGER TRIGGER From Pl2 23 From J l4 1 9 Ri R3 I I I 0 I I I 0 I 0 0 I I I 0 0 I 0 DELAYED TRIGGER INITIATE To Deloy F IC6 2 3 TR IGGER Model 3484A Section VII INHIB IT f HOLD CIRCUI T s Tg1 HOLD R27 4 7K R22 4 7K 4 8 PRINT COMMAND To Pl2 48 C2...
Page 83: ...1 C25 CR24 INHIBI TO I IC7 l 1 lclll I ICl5 I I IC B I I IC l2 I 88 s RB 9 R9 I IC9 I ICIO CRl9 I liC131 I I I 15 8 J6 L OOOOOOOOOO A ICl6 I ICl7 I e I ICl8 l RG3 I LAG CLK c IC19 _c21 J e LOGIC GND I IC20 IC2 1 8 8 P12 8 0 0 I I I IC22 I IC23 8 8 J2 I I E XT TR IG DELAY I 8 8 IC24 IN OUT I 8 8 CR2 1 CR22 OHM REM DC AC AC AC DC 0 0 0 0 0 IOOMV IOOOMV IOV IOOV IOOOV IOM AUTO 0 0 0 0 0 0 0 FILB FILA...
Page 84: ... f FILTER RELAY DRIVE 5V OHMS 3 i I PROGRAM 6 13 r 3484A E 30 3 43 POWER SUPPLY GROUND LAMP GROUND HIGH CURR ENT i GROUND Knob for instruments with OHMS and AC Options I 29 I V CRl7 f I CRIS I ii I I J6 I I L t i 6 0HMS ENABLE tCRIB CRl5 TOP VIEW 5V OHMS ENABLE o 5V OHMS ENABLE DC ENABLE R33 22K 30V 5V I JI I DC FUNCTION A RELAY VOLTAGE I To AIKl 3 A2K2 J2 I XIO RELAY 5 DRIVE I ToA2KI I G _l___ PO...
Page 85: ...M 1 o l I FILTER B PROGRAM IFILTERI 53 5 TI 7 Kl I I2e 0 26 1 1 25 Jl4 I J1 s r I D B DELAY To Delay Generator FILTER A DRIVE t i To Jl J J2 E IOV IOKn ENABLE IOOMV IOOn ENABLE _ _ ______ FILTER B DRIVE IOOV IOOKll To JI H J2 D ENABLE IOOOMV IOOO l ENABLE IOOOV IOOOKn ENABLE l________________________________ IFILTER I 53 0 3 4 I 0 7 VIEW FROM REAR NOTE For a ll Enable Signals LOW Enable HIGH Not E...
Page 86: ...4 C3 us 014 j ooo7 14 IC3 8 0 0 0 0 0 0 0 0 R1 R2 C4 R3 R4 0 Rs 0 JS 0000000000 A CIRCUIT SIDE hp REMOTE Part No 11151 66502 PROGRAM ASSEMBLY 10 J4 Cl Cl2 LI LB C2 L2 C3 L3 Cl3 CD I u L9 I Cl4 a LIO u 7 I Cl5 I IC4 s Cl6 L8_ __Jl4 Cl7 C4 CIO CIB L4 RI Lii CS R2 Cl9 L5 R3 _ _Ll2 C6 R4 C20 L6 RS Ll3 C7 Cll RB L7 030 Ll4 ____ _ _ I R9 ICS 002 LIS 14 S 040 0 R6 06 010 R7 Oas CRI COMPONENT SIDE hp Part...
Page 87: ...n IOOV IOOKn RATIO EXTERNAL TRIGGER PRINT COM PR1R or M_ _ r M __ _____ _ p 1 M _ tA M Nr i_______ Fi CR7 ACC ris 100 Cl2 _ 0021 5 7 ri10 100 Cl4 0021 5 7 CR9 ACC fl 9 100 Cl3 0021 5 7 CR8 ACC C20 0021 II C4 00027 C7 0021 R5 5V 5V RI 2o7K 5V I R3 IOK 12 IC3 13 10 C3 0027 L ___ r r _ _ _ _ _ J f _ _ _ _ J _ _ II 1 51A J 303 53 CHASSIS GROUND_ COPYRIGHT 1970 BY HEWLETT PACKARD PROGRAM ACCEPT Program...
Page 88: ...021 5Il CR3 ACC ri1 100 Cl 0021 g IJ CRI ACC r2 100 C2 0021 I CR2 Section VII D 4 1 c 6 9 i TERNAL TRIGGER ENCODE PRINT COMMAND FLAG INTERFACE HOLD INHIBIT Jl4 REMOTE CONNECTOR Fl LTER A PROGRAM FILTER B PROGRAM IOOOKn PROGRAM OHMS PROGRAM VAC DC PROGRAM VAC AC PROGRAM NOTES 1 ACC on A5 Proc irom Accept Siona I 2 iiiJ on A4 l Isol ated Prooram Accept siQnal 3 Isolated YOl taoe supplied by 34BOAIB ...
Page 89: ... Q e V R33 Rl4 TPl eQ Q R34 Rl8 8 a CR V R24 QQ __ir i io B cR 1 R21 _ O IC R35 R23 II TP C RC4 9 R26 v u___ _J C3 CR2 R2 2 I s R 0 9 R27 __ V V CR5 C5 I___ c J Q Q R30 R6 KI v J l J CR l2 r Q 1 B R36 3484A B 30388 V R29 CRl7 A6 hp Port No 11152 66501 Rev A ...
Page 90: ...7K C5 01t IOMEG ADJ RELAY VOLTAGE r oRIVE CIRCU1rs 30V R24 90K TPI E1N 10 I To Pl2 33 I I r r I OHMS t DRIVE r v O V E R L O R lsECTION J I I I I I CR6 TP3 30V A 30V I I l CI POWER OI SUPPLY rt s GROUND i HIGH I CURRENT rt 3 f i GROUND v 1 v LOW 1 CURRENT r of GROUNOV i I v 5V Hf 5V I 20V t Ef 20V I CR7 9 09V 21VZ LC2 1 0 OSI OHMS r Bk 1 6 f OHMS ENABLE L____________ _ 11152A D 3034 COPYRIGH 1970 ...
Page 91: ...0000000 1 L 3 0 3_c _J z z oii P12 S 0 0 P12 33 FUNCTION ASSEMBLY A3 CDllPOIEIT SIDE FRONT OF INSTRUMENT z ffi E 0 u Model 3484A w 2 c E 0 J2 r I 0 0 0 0 0 0 0 0 0 0 Lo 3 3_o_o_o_ _J Jl w w u gg LI 0 0 0 0 0 0 0 0 0 0 I A _9_o_o_c _ c _c _o_ _ VAC ACI voe n 2 0 4 0 6 0 5V 7 0 20V 9 0 SAMPLE RATE HOLD 11 0 TRIG PUSHBUTTON NO 13 0 POWER SUPPLY GROUND 15 0 1000 mV 1000 n RANG E 17 0 100 V 100 kO RANG...
Page 92: ...6 0 s s TRIGGER 22 47 PRINT COMMAND OUTPUT FLAG Ct 0 EXT TRIGGER 23 48 PRINT COMMAND 0 w COMP OUT 24 49 CLOCK CONTROL _ j UPRANGE 25 50 DOWNRANGE P12 PLUG IN CONNECTOR Viewed from inside rear panel I J _ J VACIAC PROGRAM PROGRAM ACCEPT I 14 VAC DC PROGRAM FILTER BPROGRAM I 15 OHMS PROGRAM FILTERAPROGRAM 116 1000 kn RANGE PROGRAM INTERFACE HOLD INHIBIT 17 5 RATIO PROGRAM PRINT COMMAND OUTPUT FLAG 1...
Page 93: ...N 3 Jl PINS J2 PIN 4 J3 PINS H FF l 29 JS PIN 9 J14 PIN 25 SAMPLE RATE J3 PINS K AA INPUT GUARO TERMINAL TERMINAL SWITCH ISOLATEO CIRCUIT GROUNO OPTION 0041 Jl PINS 10 15 S J3 PINS 7 H J48 PINS RATIO REF INPUT LOW OPTION 002 TRANSFORMER CENTER TAP SHIELOS Jl PINS 12 L N J2B PIN 4 J3 PINS 5 E J4BPIN 4 J5B PIN 4 REAR GUARD FR 0NT o GUARD CHASSIS POWER LINE GROUND wLOW CURRENT GROUNO wHIGH CURRENT GR...
Page 94: ...l Digitran Co Pasadena Cal Transistor Electronics Corp Minneapolis Minn Westinghouse Electric Corp Electronic Tube Div Elmira N Y Filmohm Corp New York N Y Cinch Graphik Co City of Industry Cal Silicon Transistor Corp Carle Place N Y Avnet Corp Culver City Cal Fairchild Camera Inst Corp Semiconductor Div Mountain View Cal Minnesota Rubber Co Minneapolis Minn Birtcher Corp The Monterey Park Cal Syl...
Page 95: ... Semiconductor Corp New Haven Conn Carling Electric Inc Hartford Conn Circle F Mfg Co Trenton N J George K Garrett Co Div MSL Industries Inc Philadelphia Pa Federal Screw Products Inc Chicago Ill Fischer Special Mfg Co Cincinnati Ohio General Industries Co The Elyria Ohio Goshen Stamping Tool Co Goshen Ind JFD Electronics Corp Brooklyn N Y Jennings Radio Mfg Corp San Jose Cal Groove Pin Corp Ridge...
Page 96: ... Ill 94375 Automatic Metal Products Co Brooklyn N Y 94682 Worcester Pressed Aluminum Corp Worcester Mass 94696 Magnecraft Electric Co Chicago Ill 95023 George A Philbrick Researchers Inc Boston Mass 95146 Alco Elect Mfg Co Lawrence Mass 95236 Allies Products Corp Dlania Fla 95238 Continental Connector Corp Woodside N Y 95263 Leecraft Mfg Co Inc Long Island N Y 95265 National Coil Co Sheridan Wyo 9...
Page 97: ...01 OOLAD CODE LIST Manufact urer Dayton Rogers Mfg Co Siemens America Inc Molex Products Company Mallory Capacitor Co Colorado Screw Machine OF Model 3484A MANUFACTURERS Addre ss Minneapolis Minn New York N Y Downers Grove Ill Indianapolis Ind Loveland Colo ...
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