HP 400E Operating And Service Manual Download Page 53

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Section VIII

Models 400E/400EL

NOTE

If any of the parts listed in Change

are changed to values shown in

Table

6-1

and Schematic Figure

7-1,

app parts should be changed.

CHANGE NO.3

CHANGE NO.4

CHANGE NO.5

CHANGE NO.6

CHANGE NO. 7

CHANGE NO. 8

CHANGE NO. 9

8-2

Change A2R44 to R·: fxd met flm 150 ohms

1070; -hp- Part Number

0757-0284.

Change A2R16 to R: fxd comp 8 2 kilohms

5%; -hp- Part Number

0683-8235.

Delete A2R72, A2R73, A2R74, A2CR20, A2CR21, A2C44.

Change A2Q3 to TSTR: Si PNP 2N3638; -hp- Part Number 1853-0016.

Change A2Q4 to TSTR: Ge PNP 2N118 3; -hp- Part Number 1850-0064.
Change A2R67 to R: fxd comp 390 ohms

5%; -hp- Part Number 0683-3915

and delete A2CR22.

Section VI Replaceable Parts and Figure 7-1 Schematic Diagram

Delete: A2R67 and A2CR22.

Change A2C12 to C: fxd 110 pF

5%; -hp- Part Number 0140-0194.

Section VI Replaceable Parts

00400-66502 printed circuit board has different location for relay connections:

AIKI and AIK2. Check configuration of relay connections and order part
numbers shown according to location of relay terminals.

DDDD

0490-0195

0490-0478

0490-0196

0490-0343

RELAY BOTTOM VIEWS

Table 6-1 Replaceable Parts and Figure 7-1 Schematic:

Change A2Q5 to -hp- Part Number 1855-0068 and A2R16 to 8 2 kilohms

5%, -hp- Part Number 068 3-8 325. If A2Q5 should be defective, replace both

A2Q5 and A2R16 with latest part numbers to reduce noise.

Table 6-1 Replaceable Parts and Figure 7-1 Schematic

Change A2R73, R74 to 4.7 kilohms, -hp- Part Number 0683-4725. Replace

with latest part numbers to reduce noise produced by A2CR20 and CR21.

Table 6-1 Replaceable Parts and Figure 7-1 Schematic.

Delete: A2R75.

Table 6-1 Replaceable Parts and Figure 7-1 Schematic.

Delete:A2C45.

Table 6-1 Replaceable Parts.

Change  15  connector power  cord  to  -hp- Part  Number  1251-0148 .
Change Panel  rear  to  00400-00202.
Change  Cord  Assy  power  to  8120-0078 .

Summary of Contents for 400E

Page 1: ...OP RATI G AND SERVICE MA UAL AC VOLTMETER u ttlU I _ _ I 1 ll 1 _n_ 400E 400EL Ito 1 10 HEWLETT PACKARD l g m 8 m I ...

Page 2: ...Verso Filler Page z z ...

Page 3: ...dating Changes WARNING I To help minimize the possibility of electdcal fire or shock hazards do not expose this instrument to rain or excess moisture hp Manual Part No 00400 90020 Microfiche Part No 00400 90067 Copyright Hewlett Packard Company 1966 P O Box 301 Loveland Colorado 80537 U S A Printed January 1980 ...

Page 4: ...to hp from another country Hewlett Packard warrants that its software and firmware designated by hp for use with an instrument will execute its programming instructions when properly installed on that instrument Hewlett Packard does not warrant that the operation of the instrument or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY The foregoing warranty shall not ap...

Page 5: ...helllutic Description _ _ _ 4 1 4 9 Impedunce Converter _ 4 1 4 12 Meter Amplifier 4 2 4 15 Meter Bridge 4 3 4 20 AC Output Circuit 4 3 4 22 Power Supply _ 4 3 Section V MAINTENANCE 5 Introduction 5 3 Required Equipment 5 5 Mechunicul Zero Adjust Puge 5 1 5 1 5 1 400E Only 5 1 5 7 Performunce Checks 5 5 9 5 24 5 27 5 29 5 31 Accurucy und Frequency Response Tests Input Impedunce Check AC to DC Conv...

Page 6: ...d Components 5 15 6 1 Standard Abbreviations _ 6 1 6 2 Code of Manufacturers 6 2 6 3 Replaceable Parts 6 3 LIST OF ILLUSTRATIONS Figure Page I I Models 400E and 400EL AC Voltmeters I I 2 1 Power Cords 2 1 3 2 Location of Controls and Indicators 3 2 3 1 External Battery Connection 3 3 3 3 Isolation Trailsformer 3 3 3 4 Impedance Correction Graph 34 4 1 Simplified Block Diagram 4 1 4 2 Meter Bridge ...

Page 7: ...ny electrical instrument in such an environment constitutes a definite safety hazard KEEP AWAY FROM LIVE CIRCUITS Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made by qualified maintenance personnel Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable remo...

Page 8: ...to 4MHz Net 6 lbs 2 7 kg Shipping 8 Ibs 4 kg AC DC Converter Output 1Vdc output for full I scale meter deflection linear output for Model Dimensions 6 1 2 in high 5 1 8 in wide II in 400E EL deep 165 I X 130 2 x 279 4 mm Models 400E 400E L Accuracy of full scale of Reading Frequency Range 10 Hz 40 Hz 500 1 kHz 2 Hl 4 MHz 10 MHz 001 vt 003 V 01 V 3 V 10 V 30 V 100 V 300 V I I 12 5 2 5 11 0 12 5 2 5...

Page 9: ...pecifications 1 4 OPTIONS AVAILABLE_ 1 5 OPTIO N 01 400E ONLYl 1 6 Option 01 places the dB scale uppermost for greater resolution when making dB measurements INFORMATION 1 7 OPTION02 1 8 Option 02 adds a relative reference adjustment to the 400E EL The REL REF control allows a continuous reduction in sensitivity by a maximum of 3 dB in order to make relative voltage or dB measurements 1 9 I N S TR...

Page 10: ...um Overload AC sinewave voltages input to the 1 mV through 1 V ranges must not exceed the values shown 5K 10K 20K FREQUENCY Hz 30K AC sinewaves input t o the 3 V through 300 V ranges must not exceed 500 V rms The limit of 300 V dc must not be exceeded on any range 40K 400 8 3889 Models 400E 400EL 22 v 50K ...

Page 11: ...7 POWER CORDS 2 8 Figure 2 1 illustrates tile standard power plug configurations tllat are used tllroughout tile United States and in other countries The hp part number directly below each drawing is the part number for a 400EjEL power cord equipped with a power plug of that configuration If the appropriate power cord is 110t included with the instrument notify the nearest hp Sales and Service Off...

Page 12: ...of the instrument for shipment Refer to Paragraph 2 23 if the original container is to be used 2 24 if it is not If you have any questions contact YtJur local hp Sules and Service Office See Appendix B for office locations 2 2 Model 400E EL NOTE If the instrument is to be shipped to Hewlett Packard for service or repair attach a tag to the instrument identifying the owner and indicating the servic...

Page 13: ...nd rms calibrated any distortion will affect the accuracy of the measurement Table 3 1 shows t he errors caused by distortion Ensure that 115 230 V ac slide switch on the rear panel matches line voltage used and connect power to the instrument Mechani cally zero the instrument using the proce dure outlined in Paragraph 5 5 To operate the ModeI400E EL with battery power connect two 35 to 55 volt ba...

Page 14: ...in order to make relative readings easier o RANGE Selector Selects full scale reading of meter DB reading on scale adds algebraically to dB setting of RANGE selector CD line ON Toggle Switch Applies primary power CD LINE Indicator Lamp Indicates application of primary power o FUSE 1 8A Protects instrument against current overload 0 115 230 Volt Slide Switch Selects 1 15 or 230 volts ac for line op...

Page 15: ...r correction at that point The correction for 50 ohms is 1O SdBm and the corrected reading is 40 SdBm Section III 3 10 Ac to Dc Converter a Follow steps a through e in Paragraph 3 8 b Connect the rear panel DC OUTPUT terminals to a dc measuring device with a high input impedance The dc output resistance is 1000 ohms and if it is loaded the dc output signal will be inaccurate c The dc output is a 0...

Page 16: ... essentially the same as o peration of the standard 400E The dB scale reads from 15 to 2 instead of from J tn lnci j nl 1r p ci It thp top of the scale for better resolution 3 14 400E EL WITH OPTION 02 3 15 Option 02 adds a relative referEnce adjustment to the 400E EL This adjustment llows a meter indication to be varied by 3dB Use the REL REF adjustment to set the meter at arlY reference OdB for ...

Page 17: ...volt range the Post 1 IMPEDANCE I INPuT I CONVERTER I ATTEN I I I INPUT I I I I I I I I I L ___________ J OC El_ 34A SHIELD POST ATTEN Attenuator is switched back to the 30dB position and then it attenuates lOdB per step on the higher ranges Variable capacitor S2C2 is adjusted on the 003 volt range with a 3mV 8MHz input to adjust the 8MHz response of the 003 volt range With a full scale input on a...

Page 18: ...rument against destructive overloads 4 11 A field effect transistor A2Q5 is used in the input stage of the impedance converter because of its characteristically high input impedance and good frequency response A2R 17 adjusts the dc bias of the 4 2 impedance converter The output is taken from the emitter circuit of A2Q7 and applied to the post attenuator and then applied to the meter amplifier The ...

Page 19: ...s equal to the current into the bridge 4 18 During the negative half cycle A2CRI 6 conducts and draws current from the feedback path dotted line Part of the current goes through A2C36 Section IV and A2CR16 into the amplifier and part goes through A2R53 and the meter to ground The current through A2R53 turns on A2Q14 and the current from A2Q14 goes through A2R54 and A2CR 16 to the amplifier Again t...

Page 20: ...Verso Filler Page z z ...

Page 21: ...he instrument and pro tective covers removed Such maintenance should be performed only by service trained personnel who are aware of the hazards in volved for example fire and electrical shock Where maintenance can be performed without power applied the power should be removed ...

Page 22: ...nput I Frequency Range dc to 10MHz DC Standard Output Adjustable to 0 45V I V and 3V hp Model 740B DC Standard Accuracy 0 1 or better Differential Voltmeter 0 10 MV See Figure 5 2 for schematic Reference a Resistor fxd 6500 ohms I a hp Part No 0811 0392 Supply b Resistor var 500 ohms 5 b hp Part No 2100 0324 10 turn c Resistor var 50 ohms 5 c hp Part No 2100 1481 10 turn d Battery I 34 volts d Mal...

Page 23: ...f a routine performance check 5 ACCURACY AND FREQUENCY RESPONSE TESTS 5 10 The accuracy and frequency response tests compare the Model 400E EL with its accuracy specifications Three methods are given in the following paragraphs Any one of the three procedures can be used dependent upon the test equipment available and the desired accuracy to which the 400E EL is to be checked The procedure using t...

Page 24: ...I volt only can be used on the expanded scale 3 and I volt can be attenuated by the 652A range switch at less accuracy b Turn the 652A to the expanded scale and adjust the REF SET control for 0 or OdB c Change the frequency to those in Table 5 2 and 5 3 Adjust the 652A AMPLITUDE control until 0 is read on the expanded scale of the meter The dc output of the 400E EL should be within tolerances list...

Page 25: ... 6 5 0 30 0 020 10 M 3 3 00 5 0 949 0 0475 i 1 0 1 00 5 1 00 0 05 2 I 2 00 6 5 0 633 0 0411 i 0 5 0 50 8 0 50 0 04 1 1 00 15 0 316 0 03481 0 3 0 30 12 0 30 0 036 These tolerances can also be used on the ollowing ranges 10mV 100mV NOTE The test oscillator used must have very low distortion Jess than 1 A thermal converter and an average responding circuit react differently to distortion and any dist...

Page 26: ... Tolerances Frequency I Millivolt Range Only Frequency I Millivolt Range Only Hz Yoltage Meter mY IX Output Hz Yoltage Meter mY IX Output Input of reading Yolts Input of reading Yolts 10 1 00mY 1 00 5 1 00 0 05 lOOk 1 00mY 1 00 1 1 00 0 005 0 5mY 0 50 7 6 0 50 0 038 0 5mY 0 50 2 0 50 0 0045 O 3mY 0 30 10 8 0 30 0 033 O 3mY 0 30 3 3 0 30 0 0043 40 1 00mY I OO 1 00 0 02 500k 1 00mY 1 00 1 1 00 0 02 ...

Page 27: ... 1 5 Il 0 Il 5 Il UJ 0 z Ci t 5 UJ Il l 0 1 5 2 0 1 3 1 2 2 3 CI F S 0 READING Il o Il Il UJ 3 0 f Z Ci I f r R 40 F S F S 2 l t 1I t J l 3 L L __ ___L __1 __ L o 1 3 1 2 2 3 F S Il o Il Il UJ C1 a t UJ Il Il 0 Il Il UJ z Ci t UJ Il 0 Section V I F S 1 READING 4 r r 1 r r r 3 1 r t 1 5 F S 1 5 READING 6 _6L _ __ LI_______ I o 10 8 6 4 2 0 2 4 6 8 10 0 1 3 1 2 213 t 2 5 F S 2 5 READING 1 3 1 2 2 3 ...

Page 28: ...mal converter and a 1 volt output from the dc standard Models 400E 400EL f Repeat steps a through d in this paragraph using the one volt thermal converter and the 50 ohm output of the test oscillator Set the 400E EL to the 1 volt range 5 20 Range Tracking Test 5 21 The range tracking test checks the accuracy of the 400E EL with a 1 3 scale input over its entire frequency range 5 22 After verifying...

Page 29: ...attenuator between the BNC T connector and the 400EjEL INPUT d Using the oscillator amplitude control as coarse adjustment and resistor R4 as a fine adjustment set the oscillator output so that the thermal converter output nulls the reference supply output e Repeat step d for each frequency listed in Table 5 2 If the 400E EL is within specifications the meter indication and the dc output will be w...

Page 30: ...12 volts This should occur at a frequency of 132kHz or greater verifying an input capacity of 12pF or less on the 3 volt range Models 400E 400EL d Repeat steps a and b with the 400E EL on the 1 volt range e Increase the test oscillator frequency until the 400E EL indication drops to 0 707 volts This should occur at a frequency of 63 5kHz or greater verifying an input capacity of 25pF or less on th...

Page 31: ... remove the top or bottom covers remove the Phillips screws holding the cover slide the cover about 1 inch to the rear and lift it off To replace the cover reverse the removal procedure If it is necessary to remove a side cover remove the four Phillips screws and lift it off NOTE Connect a dc voltmeter to TPI The volt age should be 26 2V Connect a dc voltmeter to TP2 The voltage should read 26 2V ...

Page 32: ...trol as a coarse adjustment and R4 Figure 5 2 as a fine adjustment increase the oscillator output until the thermal converter exactly nulls the reference supply output Models 400E 400EL i Adjust S2C2 for a digital voltmeter indication of 1 000 O 04Vdc The 400E EL should read 3 16 O l 58mV NOTE Check at 6 and 4MHz Amplitude can be lowered at 4MHz by mOving A2Cl i and C13 closer together j Lower the...

Page 33: ... using the attenua tor For greater accuracy the calibrator output can be monitored by the ac differential voltmeter and the ADJUSTMENT 400E ELINDICATION I METER DC OUTPUT A2R38 10mV O l mV R2 I 000 to 005Vdc A2C28 10mV to 5mV I 000 0 05Vdc S2C2 3mV 0 15mV 0 949 0 047Vdc A2R44 ImV 0 01mV 1 000 O 005Vdc AIr 2 3V 0 03V 0 949 to 004Vdc AC INTERNAL CALIBRATION adjustment can be used to adjust the calib...

Page 34: ...voltage input Adjust the oscillator s fine control for an exact meter reading on the 400E EL The reading on the oscillator s meter should be within tolerance n Repeat steps h thru m for descending ranges at full scale and 1 3 full scale using the appropriate tables for tolerances Below 50mV do not use Figure 5 5 position A as the calibrator is more accurate than the differential voltmeter at these...

Page 35: ...le wobbles 12 Low line transients 13 Transients on range change l V to 3V 14 Peaking at 5MHz 10 15 Voltage slightly low on 1mV range 16 Low voltage 10 and 20Hz near full scale 5 48 TROUBLESHOOTING 8 Extreme condition check A2Q5 Q6 and Q7 Small variation change value of A2RI8 Refer to Table 5 11 9 AC output circuit Check A2QI5 and QI6 Refer to Paragraph 5 58 and Table 5 11 10 Meter Amplifier Circui...

Page 36: ... f the voltage at pin 22 is low pull the wht orn yel wire from pin 22 and measure the ac signal at the wire It should be 3 mY If the voltage on the wire is proper the t rouble is i n the meter 5 1 4 Models 400E 400EL ampl ifier If i t isn t correct the trouble is either in the Post At tenuator or the Impedance Converter 5 5 5 To check the Impedance Converter measure the ac voltage at its output A2...

Page 37: ...ge at high frequencies i ncrease resistance o to 24 pF Adjust 8 and 10 MHz frequency response Normally not loaded Used to raise response 5 pF 12 pF 24 pF 0 160 0763 0 1 40 0201 0 1 60 0196 18 to 22 I F Adjusts 10 and 20 Hz frequency response on all ranges Increasing the capacitance increases the response 39pF to zero Affects 10 MHz response 36 kilohms to 68 kilohms Adj usts the bias level at A2Q5 ...

Page 38: ... t 0 03 t 0 03 t 0 09 3 00 0 1 5 1 00 t 0 1 0 j t 0 03 t 0 03 0 03 t 0 06 1 00 0 1 5 1 00 0 05 j 0 0 t 0 0 1 0 0 1 0 03 1 00 0 05 0 30 0 032 j 0 0 1 t 0 0 1 0 0 1 0 02 0 30 t 0 032 0 30 t 01 5 I I t 003 t 003 t 003 t 009 0 30 t 01 5 DC Output I V 0 949 t 0 047 J t 0 004 7 t 0 0047 t 0 0095 t 0 047 0 949 t 0 047 0 3 1 6 t 0 032 j t 0 0032 t 0 0032 0 0063 t 0 032 0 3 16 t 0 032 1 00 t 0 05 1 t 0 005...

Page 39: ...l m m f r m m g mV f V mV nA NC N NO fl HR e J K l M MP P Table 6 1 Standard Abbreviations _n r_ he tL levelels per second NPO Slde diameter n Impregnated OSf ncandescent rnsulatlonied oM kl hml l 1 0 3 0hms 00 kilohertz 1 0 3 hertz p nductor p A linear taper pc loganthmlc taper pf Pi o mIlliampereIs 10 3 amperes p o megahertz 1 0 6 he u pos megohm s 1 0 6 ohms poly metal tslm p o l manufacturer p...

Page 40: ...ric C o Schenectady N Y 1 2305 2 6 3 6 5 Gries Reproducer Corp New Rochelle NY 1 0804 28480 Hewlett Packard Co Palo Alto CA 94 304 56289 Sprague Electric Co North Adams MA 0 1 247 70563 Amperite Co Inc Union City NJ 07083 70903 Belden Mfg C o Chicago I L 606 2 2 7 1 400 Bussmann Mfg Div St Louis MO 63 1 2 1 7 2 1 3 6 E lectro Motive Mfg Co Inc Willimantic CT 0 6 2 2 6 7 2 9 8 2 Erie Technological ...

Page 41: ...cw C fxd elect luF 75 10 25 I dcw C fxd mica 82pF 5 C fxd Ta elect 100uF 20 10 l dcw C fxd elect 10uF 100 10 25 I dcw C fxd mica 39pF 5 C fxd Ta elect 0 22uF 10 35 I dcw C fxd A I elect 500uF 75 10 10 I dcw C f x d Ta elect 6 8 I F 10 35 1 dcw C fxd cer 0 1 I F 8 0 20 50l dcw C fxd AI elect 450uF 30 10 3 I dcw C fxd cer durez coated di sc 0 01uF 80 20 10 I dcw C fxd Ta elect 4 7uF 10 35 I dcw C fx...

Page 42: ...207 02 1854 0033 2 TSTR Si NPN 2N3391 24446 2N3391 03 1853 0062 1 TSTR Si PNP 2N3645 07263 2N3645 04 1853 0006 1 TSTR Si PNP 2N3134 04713 2N3134 1205 0033 Heat disapator semiconductor for A204 05820 NF 207 05 1855 0082 1 TSTR Si FET P Cha nnel hp 06 1854 0073 2 TSTR S i NPN 2N3478 86684 2N3478 07 1853 0009 2 I TSTR S i PNp hp 1205 0018 1 Heat disapator semiconductor for A207 05820 NF 203 08 1854 0...

Page 43: ... fxdmetflm 200 ohms t 1 1 8W 75042 CEA T O obd R49 0757 0273 R fxdmetflm 3010ohms 1 1 8W 75042 CEA T O obd R50 0698 4434 1 R fxdmetflm 2320ohms 11 1 8W 75042 CEA obd R51 0757 0284 1 R fxdmetflm 150 ohms 11 1 8W 75042 CEA obd R52 0684 1011 R fxdcomp 100 ohms 10 1 4W 01121 CB1011 R53 0751 0283 1 R fxdmetflm 2000 ohms 1 1 8W 75042 CEA obd R54 0698 3358 1 R fxdmetflm 1000 ohms 1 1 8W 75042 CEA T O obd...

Page 44: ...ns 03877 SC5050 Rl 0757 0715 R fxd met flm 150 ohms J l 1 4W 75042 CEA T O obd R2 0757 0069 R fxd met flm 121 ohms 1 1 4W 75042 CE8 T O obd R3 0757 0178 R fxd met flm 100 ohms 1 1 4W 75042 CEB T O obd R4 0698 4119 R fxd met flm 410 26 ohms 0 1 1 4W 19701 MF6C T 3 obd R5 0698 4118 R fxd met flm 277 48 ohms 0 1 1 4W 75042 CEA T O obd R6 0698 4119 R fxd met flm 410 26 ohms 0 1 1 4W 19701 MF6C T 3 obd...

Page 45: ...atod hp MP14 5060 0703 2 Frame 6 X 11 sub module hp MP15 5060 0727 2 Foot Ass y 1 3 module hp MP16 0590 0052 2 Nut Tinnerman 78553 C 8020 632 24B MP17 5000 5838 2 Bracket cover retainer hp MP18 00400 64103 1 Cover top with handle hp MP19 5000 8565 2 Cover side 6 X 11 SM hp MP20 5000 8571 1 Cover bottom 5 X 11 SM hp MP2 1 MP22 1510 Q91 Bdg Post Assy grey red hp MP23 MP24 1510 0107 8dg Post Assy gre...

Page 46: ...TO EARTH GROUND S3 J5 AC OUTPUT LINE 1I 230 1 tlO 48 440 10VA MAX X El C 04 4 400E EL 9 0476 LEFT SIDE VIEW t MP28 t J MP18 Handle inc luded wit h top cover BACK VIEW Refer to Misc Page 6 6 for handle kit I I i t M P10 MP9 o Figure 6 1 Mechanical Parts NOTE The following hardware not shown MP16 Nut tinnerman MP17 Bracket cover retainer MP29 Lock washer ext ernal MP30 Sc rew top and bottom cover MP...

Page 47: ...Models 4OOE 400EL Section VI 400E Ec a 0490A Figure 6 2 Chassis and Switch Components 6 9 6 10 ...

Page 48: ...Verso Filler Page z z ...

Page 49: ...SEMBLY OR SUBASSEMBLY DESIGNATION S OR BOTH FOR COMPLETE DESIGNATION 2 COMPONENT VALUES ARE SHOWN AS FOLLOWS UNLESS OTHERWISE NOTED RESISTANCE IN OHMS CAPACITANCE IN MICROFARADS 3 DENOTES ASSEMBLY DENOTES MAIN SIGNAL PATH ________________ DENOTES MAIN FEEDBACK PATH 4 ALL DC VOLTAGES ARE 10 EXCEPT THE BASE AND EMITTER OF Q8 WHICH IS 20 5 AVERAGE VALUE SHOWN OPTIMUM VALUE SELECTED AT FACTORY 6 t REF...

Page 50: ...2 0 1 115 rH 02 E3 B4 5 E 01 B4 1 0 4 1 7 C4 67 1 D7 D4 68 D7 C 69 07 I C4 70 115 C6 71 115 5 n 4 C5 7 1 117 D4 74 117 I e6 75 B4 6 7 8 Z RZ RI A 1 CR5 Q CR2 V C4 J C J e TP3 _ _ C_2_0_ B c J Ru CR7 C3 R4 CR4 R5 8 CCI J eTPI 2 r C 2 l_ kJ C8 c C5 1 e R8 C7 lTP2 CRI ll CR3 Q R7 RII o CR6 R67 ___ CR8 _ 3 R9_ CR22 RI O YEl L J R40 R7S R41 R42 R72 IR 4 R4S R4 3 OCR 13 C 30 R66 C32 Q V R33 R30 R3 4 C2S...

Page 51: ......

Page 52: ... 04254 to 04854 5 thru 12 14 1208A18153 to 1131AI2604 536 04855 to 05503 6 thru 12 14 1208A18968 Earlier 536 05504 to 08353 7 thru 12 14 400E 1208A21368 Earlier 400EL 1208A21319 Earlier 536 08354 to 09153 8 thru 12 14 400E 1208A21489 thru 23849 400EL 1208A21549 thru 23898 536 09154 to 09553 9 thru 12 14 400E 1208A23848 Earlier 400EL 1208A23898 Earlier 949 09554 to 09753 10 thru 12 14 400E 1208A240...

Page 53: ...ceable Parts 00400 66502 printed circuit board has different location for relay connections AIKI and AIK2 Check configuration of relay connections and order part numbers shown according to location of relay terminals DDDD 0490 0195 0490 0478 0490 0196 0490 0343 RELAY BOTTOM VIEWS Table 6 1 Replaceable Parts and Figure 7 1 Schematic Change A2Q5 to hp Part Number 1855 0068 and A2R16 to 82 kilohms 5 ...

Page 54: ...t 400EL Option 02 MP12 5020 5388 Meter trim 113 module MP18 00400 64102 Cover top with handle MP19 5000 0703 Cover side 6 x 11 SM MP20 5000 0711 Cover bottom 5 x 11 SM CHANGE NO 13 Instruments that fall within this band of serial numbers have a 500 p F capacitor across the output terminals This capacitor made the meter response too slow and is no longer being used CHANGE NO 14 Table 6 1 Change A1 ...

Page 55: ...commended model should be an hp Model 3466 c The DC Standard recommended model should be a Systron Donner Model M 107A d The Voltmeter Calibrator should be deleted from the table P 5 2 Figure 5 1 Accuracy Test Setup should be altered to show the use of the Fluke 5200A ACk Calbrator rather than the hp Model 745A p_ 5 4 Figure 5 2 Accuracy and Frequency Response Test Setup should be altered to show ...

Page 56: ...Figure 5 2 Delete paragraphs 5 45 5 46 and 5 47 Plge5 12 Delete Figure 5 5 Alternate Calibration and Fre quency Test Setup 25 June 1984 1 Millivolt Rlngl Only Frequlncy Hz Voltlge Meter mV DC Output Input 1 of reading Volts 100 k 1 00 mV 1 00 1 1 00 0 005 0 5 mV 0 50 2 0 50 0 0045 0 3 mV 0 30 3 3 0 30 0 0043 500 k 1 00 mV 1 00 1 1 00 0 02 0 3 mV 0 30 3 3 0 30 0 013 4 M 1 00 mV 1 00 5 1 00 0 05 0 3...

Page 57: ... C8 C2 R41 R4Z C23 8 C24 RI6 RI8 0 10 CRI2 R73 R2 2 C26 CR20 C22 CI6 R27 CI5 CIZ C5 G R8 1 TP2 R72 CRI3 R36 R26 C30 RI4 R20 e CRI CR3 Q R _ B R66 R47 Q R46 RZ8 CI3 8 R48 R 5I R76 R24 J CR6 R67 _ __ CR8 R45 R50 C46 CII I C32 8 C31 I RZI R 2 3 _3R9_ Q3 RIO R43 R 78 V R68 CR22 C41 R60 R56 R64 R61 RS 39_ R63 r 5 R6Z Q RS8 lw l _ C4S C40 C38 TP5 R49 C29 C3 5 Q R37 D RS2 C33 RS4 C34 R 3 CRIS C 47 Q CRI6...

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