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TM 11-6625-1514-15

D E P A R T M E N T O F T H E A R M Y T E C H N I C A L M A N U A L

ORGANIZATIONAL, DS, GS,

AND DEPOT MAINTENANCE MANUAL

HEWLETT-PACKARD

VOLTMETER

400D, 400H, 4001

VACUUM TUBE

MODELS

AND H02-400D

This copy is a reprint which includes current

pages from Changes 1.

H E A D Q U A R T E R S , D E P A R T M E N T O F T H E A R M Y

M A Y 1 9 6 7

Summary of Contents for 4001

Page 1: ...CAL MANUAL ORGANIZATIONAL DS GS AND DEPOT MAINTENANCE MANUAL HEWLETT PACKARD VOLTMETER 400D 400H 4001 VACUUM TUBE MODELS AND H02 400D This copy is a reprint which includes current pages from Changes 1 HEADQUARTERS DEPARTMENT OF THE ARMY M A Y 1 9 6 7 ...

Page 2: ...WARNING DANGEROUS VOLTAGES EXIST IN THIS EQUIPMENT Be careful when working on the power supplies and their circuits or on the 230 or 115 volt ac line connections DO NOT TAKE CHANCES ...

Page 3: ... indicated by a vertical bar in the margin 3 Added or revised illustrations are indicated by a vertical bar next to the figure caption 4 Remove old pages and insert new pages as indicated below Remove pages Insert pages None Warning page a b blank i and 1 0 i ii and 1 0 1 0 1 1 0 1 10 5 10 5 5 File this change sheet in front of the publication for reference purposes By Order of the Secretary of th...

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Page 5: ...WER IF YOU CANNOT TURN OFF THE ELECTRICAL POWER PULL PUSH OR LIFT THE PERSON TO SAFETY USING A WOODEN POLE OR A ROPE OR SOME OTHER INSULATING MATERIAL SEND FOR HELP AS SOON AS POSSIBLE AFTER THE INJURED PERSON IS FREE OF CONTACT WITH THE SOURCE OF ELECTRICAL SHOCK MOVE THE PERSON A SHORT DISTANCE AWAY AND IMMEDIATELY START ARTIFICIAL RESUSCITATION Change 1 a b blank ...

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Page 7: ...tallation Operation Check OPERATING INSTRUCTIONS Instrument Turn On General Operating Information Low Level Measurements and Ground Currents Measurement of Voltage Measurement of Decibels Impedance Correction Graph Use of Voltmeter Amplifier CIRCUIT DESCRIPTION Block Diagram Input Voltage Divider and Step Attenuator Broadband Voltmeter Amplifier Indicating Meter Circuit Power Supply MAINTENANCE Sc...

Page 8: ...bly 400D 75G Printed Circuit Board Assembly 400D 75F Printed Circuit Board Assembly 400D 65C NUMERICAL INDEXES Part No Numerical Index Hewlett Packard Stock No Index REFERENCE DESIGNATION INDEX AUXILIARY EQUIPMENT General Line Matching Transformer Model 11004A Bridging Transformer Model 11005A Final Performance Check Paragraph 6 1 7 1 7 2 7 3 7 4 7 5 7 6 10 1 10 3 10 7 10 8 Page 6 1 7 1 7 3 7 8 7 ...

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Page 10: ...Figure 1 1 TM 11 6625 1514 15 1 0 Change 1 ...

Page 11: ...d forward Discrepancy in Ship ment Report DISREP SF 361 as prescribed in AR 55 38 NAVSUPINST 4610 33B AFR 75 18 MCO P4610 19C DLAR 4500 15 1 A 4 Reporting Errors and Recom mending Improvements You can help improve this manual If you find any mistakes or if you know of a way to improve the pro cedures please let us know Mail your letter or DA Form 2028 Recommended Changes to Publications and Blank ...

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Page 13: ...millivolt to 300 g Accuracy Model 400D volts 400L 0 3 millivolt to 300 volts in 12 ranges providing full scale readings of the following voltages 2 of full scale 20 cps to 1 mc 3 of full scale 20 cps to 2 mc 0 001 0 100 10 00 5 of full scale 10 cps to 4 mc 0 003 0 300 30 00 0 010 1 000 100 00 Model 400H 0 030 3 000 300 00 1 of full scale 50 cps to 500 kc b Decibel Range 72 to 52 db in 12 ranges 2 ...

Page 14: ...nted in a stan dard 19 inch wide x 7 inch high relay rack space Re fer to Appendix C for Replacement Parts information 1 7 A voltmeter output signal is provided at the front panel OUTPUT terminals This output is proportional to the meter reading and has a waveshape similar to the applied signal This signal level is about 0 15 volts rms for a full scale meter reading regardless of the input signal ...

Page 15: ...itary contracts a modification of the Model 400D termed the H02 400D is equipped with a removable plug having the same pin configuration but constructed of corrosion resistant material In all other respects the H02 400D is the same as the Model 400D and carries the same Federal Stock Number The lower INPUT and OUTPUT signal terminals on the panel of the voltmeter are connected directly to the chas...

Page 16: ...TM 11 6625 1514 15 Section III 3 0 Figure 3 1 Voltmeter Front Panel Showing Controls and Connectors 00102 2 ...

Page 17: ...y constant circuit impedance The RANGE switch changes voltmeter sensitivity in 10 db steps accurate to within 1 8 db The RANGE switch position indicates the value of a full scale meter reading 3 6 CONNECTIONS Voltmeter test leads must be provided by the user The type of leads and probes used will depend upon the application as listed below a For connection to low impedance signal sources plain wir...

Page 18: ... from either the voltmeter or the signal source being measured at the power outlet as shown in figure 3 3 and by making sure that in the test setup no other ground loop is formed that can cause a ground current to flow in the voltmeter test leads Although the resultant voltage developed across a test lead is in the order of micro volt it is enough to cause noticeable errors in measurements of a fe...

Page 19: ...ment is made and refer to the Impedance Correction Graph described in paragraph 3 20 c To obtain the difference in dbm between measure ments made across different impedances convert each measurement to dbm using the Impedance Correction Graph described in paragraph 3 20 Then algebraically subtract the dbm levels being compared 3 20 IMPEDANCE CORRECTION GRAPH 3 17 MEASUREMENT OF DECIBELS 3 18 The D...

Page 20: ... by the impedance of a load applied to the OUTPUT terminals To check the effect of the applied load observe the meter reading obtained with no load connected to the OUTPUT terminals and then note any shift of reading when the external circuit is connected to the OUTPUT terminals If the shift is negligible the measurement is not being affected appreciably by the load Whenever the input signal is ch...

Page 21: ...TM 11 6625 1514 15 Section III Figure 3 4 Impedance Correction Graph 3 5 ...

Page 22: ...Figure 4 1 TM 11 6625 1514 15 Section IV 4 0 00102 2 ...

Page 23: ... volt ranges Fixed capacitor C106 permanently connected flattens frequency response on the 03 and 30 volt ranges 00102 2 4 6 Cathode follower V1 provides a constant high input impedance to the input voltage divider and INPUT ter minals of the voltmeter and provides a relatively low impedance in its cathode circuit to drive the step at tenuator The voltage gain factor across V1 is 0 95 4 7 BROADBAN...

Page 24: ... figure 5 10 The power supply furnishes regulated 250V d c voltage for the grid and plate bias circuits of tubes V1 through V5 unregulated 12 6V d c voltage for the heater supply of tubes V1 through V4 and 6 3V a c voltage for the heater supply of tubes V5 through V8 The power supply is designed to operate from either a 115 volt 10 or a 230 volt 10 a c power source of 50 to 1000 cps The primary wi...

Page 25: ...ies d c voltage for the tubes in the input cathode follower and TM 11 6625 1514 15 Section IV Paragraph 4 17 the amplifier The other section supplies a c voltage for the tubes in the power supply The voltage required for the heaters of tubes V1 through V4 is obtained from 6 3V and 7 3V secondary windings of transformer T1 which are series connected The voltage developed across the two series conne...

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Page 27: ... follows 5 3 PRECAUTIONS a Allow the voltmeter to operate for 20 minutes so that the meter movement will reach normal operating 5 4 Observe the following precautions temperature a Make no adjustments and replace no parts in the b Turn the voltmeter off and allow one minute for all voltmeter except as described in one of the following capacitors to discharge INSTRUMENT TYPE REQUIRED CHARACTERISTICS...

Page 28: ...REPLACEMENT OF SPECIAL PARTS 5 14 PRECISION RESISTORS AND INDUCTORS Sev eral parts used in the voltmeter have closer tolerances than those used in most test equipment Resistors R104 R105 R108 and R111 through R116 are pre cision components If these resistors require replace ment use the same value and type as the original as shown in the parts breakdown If different values are used or component po...

Page 29: ...element voltages at the tube sockets and compare readings with the values shown in the voltage and resistance diagram in figure 5 8 Apply a test signal to the input and measure the voltage of the test signal while tracing it through each coupling network and each stage of amplification Compare readings with those shown in the block diagram figure 4 1 In figure 4 1 an a c current probe H P Model 45...

Page 30: ...TM 11 6625 1514 15 Section V Figure 5 3 Left Side View of Voltmeter Chassis 5 4 00102 3 ...

Page 31: ...9 5 22 TESTING VOLTMETER PERFORMANCE 5 23 The following test procedure checks the accuracy and stability of the voltmeter at low and high frequencies 00102 3 and with low and high line voltages It can be used for comprehensive incoming inspection for proof of per formance and for trouble shooting If the readings are within specifications during these tests the voltmeter is operating properly This ...

Page 32: ...ve Check high voltage winding of transformer T1 Replace defective component b Rectifier CR3 or circuit component b Check for 12 6 volts dc across output of defective rectifier CR3 Check resistors R66 and R68 If tubes V1 and V2 are not lighted check capacitor C39 Replace defective component c Diode CR1 or CR2 defective c Replace diode paragraph 5 15 5 Meter indication normal on low ranges 001 to 3 ...

Page 33: ...range initially set AMPLITUDE control for 0 volts output Then note volt 00102 3 reading noted in step d k Turn the frequency response test set RANGE SELECTOR to EXTERNAL Set the external oscillator frequency to 400 cps adjust the oscillator output level to obtain a reading of 9 on the 0 to 1 VOLTS scale of the voltmeter Then adjust the METER SET control on the frequency response test set to obtain...

Page 34: ...sfactorily If operation is unsatisfactory make calibration and frequency response adjustments as directed in paragraph 5 24 5 8 5 24 CALIBRATION AND FREQUENCY RESPONSE ADJUSTMENTS 5 25 Calibration and frequency response adjustments may be required when components other than those in the power supply circuit are replaced After replacing any of these components carry out the voltmeter performance te...

Page 35: ...volt range h Set the RANGE switch on the voltmeter under test to 001 i Set the oscillator for 400 cps output frequency and adjust its output level to obtain a reading at 0 9 on the voltmeter scale j Adjust the frequency response test set METER SET control to obtain a meter reading at SET LEVEL on the test set This standardizes the monitoring point of the output level k Set the RANGE SELECTOR and F...

Page 36: ...Figure 5 8 TM 11 6625 1514 15 Section V 5 10 00102 3 ...

Page 37: ...TM 11 6625 1514 15 Section V Figure 5 9 Diagram of RANGE Switch 5 11 ...

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Page 39: ...Figure 5 10 TM 11 6625 1514 15 Section V 00102 3 5 13 ...

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Page 41: ...d in the Units per Assy column of the Group Assembly Parts List are in the case of assemblies the total quantity used in the Voltmeter at the location indicated In the case of component parts indented under the assembly the quantity listed is the quantity used per assembly The quantities specified in any one entry therefore are not necessarily the total used per complete Voltmeter Refer to the Num...

Page 42: ...epot O R level manufacture c CODE A ASSEMBLE ASSEMBLY NOT PRO CURED 1 CODE A is applied to assemblies made up of two or more units each of which carry individual part numbers and descriptions and which may be assembled by any maintenance level 6 2 2 CODE A1 is applied to assemblies made up of two or more parts each of which carry individual part numbers and description and which may be assembled o...

Page 43: ...ctron Tube Division of Radio Corp of America Harrison N J 71785 72765 72982 73734 75915 78189 Cinch Mfg Corp Chicago Ill 88044 Aeronautical Standards Group Departments of Navy and Air Force Washington D C Drake Mfg Co Chicago Ill Erie Resistor Corp Erie Pa 91506 Augat Bros Inc Attleboro Mass Federal Screw Products Co Chicago Ill 91637 Dale Products Inc Columbus Nebr Littlefuse Inc Des Plaines Ill ...

Page 44: ...MBER FOR AN ELECTRONIC OR ELECTRICAL illustration PART IF THE REFERENCE DESIGNATION IS KNOWN Find the index number on the Group Assembly 8 Parts List page to determine the complete de scription HOW TO FIND THE ILLUSTRATION FOR A PART IF THE PART NUMBER IS KNOWN 9 5 Refer to the Part No Numerical Index in Section VIII and find the part number 6 Turn to Section VII and find the first figure and 10 i...

Page 45: ... Vacuum Tube Voltmeter 7 1 D H L H02 1 400D 400H 400L H02 400D 400D 44B 2520 0006 400D 400H 400L H02 400D 400D 44B AN526 832 10 VACUUM TUBE VOLTMETER 28480 1 VACUUM TUBE VOLTMETER 28480 1 VACUUM TUBE VOLTMETER 28480 1 VACUUM TUBE VOLTMETER 28480 1 CABINET ASSEMBLY 28480 1 ATTACHING PARTS SCREW MACHINE 2 00102 2 7 1 ...

Page 46: ... 14L 15 LENS INDICATOR LIGHT 72765 1 7 2140 0012 12 LAMP INCANDESCENT 6 8 VOLT 1 2 pin base 93519 8 1450 0022 2020 AE LAMPHOLDER 2 pin base 72765 1 9 3101 0001 80994 H SWITCH TOGGLE SPST 04009 1 10 0370 0035 0370 0035 1 11 D H02 1120 0005 1120 0005 MULTIMETER REPLACEMENT 1 28480 H 1120 0301 1120 0301 MULTIMETER REPLACEMENT 1 28480 L 1120 0098 1120 0098 MULTIMETER REPLACEMENT 1 28480 12 1400 0015 1...

Page 47: ... higher assembly 0170 0002 663UW20504 CAPACITOR FIXED PAPER 2 DIELECTRIC 2 0 µf 20 400 wvdc 84411 1390 0020 INSULOID N3 CLAMP LOOP 85628 3 ATTACHING PARTS 2420 0001 510 061810 01 NUT ASSEMBLED WASHER 78189 3 0180 0063 30D120A1 CAPACITOR FIXED ELECTROLYTIC 1 500 µf 100 10 3 wvdc 56289 0180 0033 30D133A1 CAPACITOR FIXED ELECTROLYTIC 1 50 µf 6 wvdc 56289 400D 75H 400D 75H BRACKET CAPACITOR 28480 1 AT...

Page 48: ...CTRON TUBE 91506 1 23 1200 0020 51A12272 SOCKET ELECTRON TUBE 71785 1 24 0400 0013 5P 1 GROMMET PLASTIC 28520 1 25 D H L 8120 0050 CS 9941 PH151 CABLE ASSEMBLY POWER 1 7 5 FT ELECTRICAL 70903 H02 H02 400D H02 400D PWR CABLE ASSEMBLY POWER 1 PWR CORD CORD ELECTRICAL 28480 H02 CS 9941 PH151 CABLE POWER ELECTRICAL 70003 1 7 5 FT W O PLUG H02 1251 0037 MS24663 CONNECTOR PLUG ELECTRICAL 1 96906 26 9100...

Page 49: ...s s 3050 0100 AN960 6 WASHER FLAT 88044 1 2420 0001 510 061810 01 NUT ASSEMBLED WASHER 78189 1 34 0160 0024 PKM 4P5 CAPACITOR FIXED PAPER 1 DIELECTRIC 0 5 µf 10 400 wvdc 14655 35 1400 0016 781 CLAMP LOOP 83330 1 ATTACHING PARTS 2390 0001 COML SCREW ASSEMBLED WASHER 6 32 by 1 1 2 in lg s s 78189 2420 0001 510 061810 01 NUT ASSEMBLED WASHER 78189 1 36 0687 4711 RC20GF471K RESISTOR FIXED COMPOSITION ...

Page 50: ... 2w ML R 11 47 0170 0063 148P22394 CAPACITOR FIXED PLASTIC 1 DIELECTRIC 0 020 µf 10 400 wvdc 56289 48 0816 0017 C 10 6 3K RESISTOR FIXED WIRE WOUND 1 6 3K 10 10w 35434 49 0687 6841 RC20GF684K RESISTOR FIXED COMPOSITION 1 680K 10 1 2w MIL R 11 50 0690 4731 RC32GF473K RESISTOR FIXED COMPOSITION 4 47K 10 1w MIL R 11 51 0693 1031 RC42GF103K RESISTOR FIXED COMPOSITION 1 10K 10 2w MIL R 11 52 400D 75F 4...

Page 51: ...025 777 CLAMP LOOP 83380 1 ATTACHING PARTS 2420 0001 510 061810 01 NUT ASSEMBLED WASHER 78189 2 66 0761 0001 N25 8 2K RESISTOR FIXED FILM 8 2K 5 1w 1 14674 67 0687 1251 RC20GF125K RESISTOR FIXED COMPOSITION 1 1 2M 10 1 2w MIL R 11 68 2100 0077 2100 0077 RESISTOR VARIABLE 4 ohm 20 1w 1 28480 69 0690 1001 RC32GF100K RESISTOR FIXED COMPOSITION 1 10 ohm 10 1w MIL R 11 70 1882 0005 61 6911 RECTIFIER ME...

Page 52: ...CAPACITOR FIXED MICA DIELECTRIC 1 47 pf 10 500 wvdc MIL C 5 2 0887 1531 RC20GF153K RESISTOR FIXED COMPOSITION 1 15K 10 1 2w MIL R 11 3 0150 0009 315 000 C0G0 100D CAPACITOR FIXED CERAMIC 1 DIELECTRIC 10 pf 0 5 pf 500 wvdc 72982 4 400D 26G 400D 26G RESISTOR ASSEMBLY Matched set of 6 1 wire wound resistors replaceable only as a set 28480 5 0140 0014 CM15E560J CAPACITOR FIXED MICA DIELECTRIC 1 56 pf ...

Page 53: ...r assembly 1 0690 6831 RC32GF683K RESISTOR FIXED COMPOSITION 1 68K 10 1w MIL R 11 2 0687 1041 RC20GF104K RESISTOR FIXED COMPOSITION 1 100K 10 1 2w MIL R 11 3 0730 0065 DC 1 90 5K RESISTOR FIXED FILM 90 5K 1 1w 1 19701 4 0730 0076 DC 1 166K RESISTOR FIXED FILM 166K 1 1w 1 19701 5 0690 1241 RC32GF124K RESISTOR FIXED COMPOSITION 1 120K 10 1w MIL R 11 6 0690 5631 RC32GF563K RESISTOR FIXED COMPOSITION ...

Page 54: ... CM20B681K CAPACITOR FIXED MICA DIELECTRIC 1 680 pf 10 500 wvdc MIL C 5 11 0689 2425 RC32GE142J RESISTOR FIXED COMPOSITION 2 2 4K 5 1w MIL R 11 12 0693 2731 RC42GF273K RESISTOR FIXED COMPOSITION 4 27K 10 2w MIL R 11 13 0140 0025 CM15E680K CAPACITOR FIXED MICA DIELECTRIC 1 68 pf 10 500 wvdc MIL C 5 14 9140 0040 42µH 10 COIL RF 42 µh 10 99849 1 PHENOLIC FORM 15 400D 75G 1 400D 75G 1 PRINTED CIRCUIT ...

Page 55: ...IRE WOUND 2 10 ohm 0 5 1 2w 28480 4 2100 0108 2100 0108 RESISTOR VARIABLE 100 ohm 30 1 3w 1 28480 5 400D 26C 400D 26C RESISITOR FIXED WIRE WOUND 1 205 ohm 0 5 28480 6 400D 60A 400D 60A COIL RADIO FREQUENCY 0 05 µh 28480 2 7 0813 0009 CS 2 125 RESISTOR FIXED COMPOSITION 1 125 ohm 10 2w 91637 8 0130 0002 557 000 U2P0 34R CAPACITOR VARIABLE CERAMIC 1 DIELECTRIC 8 50 pf 350 wvdc 72982 9 0727 0018 DC 1...

Page 56: ... MIL R 11 3 2100 0151 2100 0151 RESISTOR VARIABLE 500 ohm 20 1 5w 1 28480 4 0757 0839 DC 1 10K RESISTOR FIXED FILM 10 K 1 1 metal film 1 2 w 19701 5 0140 0084 CM35E472J CAPACITOR FIXED MICA DIELECTRIC 1 4700 pf 5 500 wvdc MIL C 5 6 0687 1001 RC20GF100K RESISTOR FIXED COMPOSITION 2 10 ohm 10 1 2w MIL R 11 7 0687 5601 RC20GF560K RESISTOR FIXED COMPOSITION 1 56 ohm 10 1 2w value selected at factory o...

Page 57: ...TM 11 6625 1514 15 Section VIII Numerical Index SECTION VII NUMERICAL INDEXES PART NO NUMERICAL INDEX 00102 3 8 1 ...

Page 58: ...TM 11 6625 1514 15 Section VIII Numerical Index HEWLETT PACKARD STOCK NO INDEX 8 2 00102 3 ...

Page 59: ...TM 11 6625 1514 15 Section IX Reference Designation Index SECTION IX REFERENCE DESIGNATION INDEX 00102 3 9 1 ...

Page 60: ...TM 11 6625 1514 15 Section IX Reference Designation Index 9 2 00102 1 ...

Page 61: ...TM 11 6625 1514 15 Section IX Reference Designation Index 00102 1 9 3 ...

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Page 63: ...Kc and 600 Kc midfrequency value Balance Better than 40 db over entire frequency range Power Handling Capacity 22 dbm 10 volts across 600 ohms Dimensions 2 inches wide 2 inches long and 4 inches high Weight 12 oz 10 6 The Model 11004A is used to terminate a 600 ohm unbalanced line to a 135 or 600 ohm balanced line A two position toggle switch the 600 Ω BRIDGING switch provides termi nating or brid...

Page 64: ...such at the H P Models 400D H and 400L and Distortion and Wave Analyzers such as the H P Models 330B C and 330D to work from balanced lines without dis turbing the circuits under test It will bridge transmission lines at 10 000 ohms and is equipped with a switch to allow 600 ohm line termination 10 9 When it is desired to terminate a bal anced communications system into unbalanced measuring equipm...

Page 65: ...5 8 high overall 2 db to 45 Kc Shipping Weight 6 lbs Table 10 3 Replaceable Parts H P Part No Description Mfr I Mfr part No TQ 0340 0090 0730 0011 0730 0029 1510 0006 1610 0007 3101 0001 Insulator binding post R fxd 638 ohms 1 w R fxd 10 K ohms 1 w Binding post black Binding post red Switch toggle 1 28480 2 99459 2 94459 1 28480 1 28480 3 04009 0340 0090 obd obd 1510 0006 1510 0007 obd 4 1 1 1 3 1...

Page 66: ...al bridging type of 600 ohm setup showing balanced to unbalanced line confirmation Figure 10 3B Typical setup showing unbalanced to 135 ohm balanced line configuration Figure 10 4 Typical measurement setup Figure 10 5 Signal generator setup Figure 10 6 Model 11005A bridging transformer 10 4 AGO 7945A ...

Page 67: ...to the secondary of the transformer 2 Switch the transformer to the bridging position and adjust the generator for an output of 0 db at 100 KHz 3 Connect the meter to the 600 ohm primary of the transformer There should be less than 0 3 db loss 4 Repeat the test in the range between 5 KHz and 600 KHz The reading should not vary more than 1 db b Bridging Transformer Model 11005A Not applicable Chang...

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Page 69: ... G WICKHAM Major General United States Army The Adjutant General Distribution Active Army USAMB 1 USACDCEC 1 USACDCCEA 1 USACDCCEA Ft Huachuca 1 USASTRATCOM 8 USASTRATCOM PAC 5 1st LOGCOMD 6 HAROLD K JOHNSON General United States Army Chief of Staff 2d LOGCOMD 6 9th LOGCOMD 5 Eighth USA 6 SAAD 6 TOAD 6 LEAD 3 NG None USAR None For explanation of abbreviations wed see AR 320 50 ...

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