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Fluke 415B, Instruction Manual

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Fluke 415B Instruction Manual Download Page 67

Summary of Contents for 415B

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Page 3: ...ce facility giving full details of the difficulty and include the model number type number and serial number On receipt of this information service data or shipping instructions will be forwarded to you 2 On receipt of the shipping instructions forward the instrument transportation prepaid Repairs will be made at the Service Facility and the instrument returned transportation prepaid SHIPPING TO M...

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Page 5: ... Procedure 2 3 2 12 Applications 24 3 THEORY OF OPERATION 3 1 3 1 Introduction 3 i 3 3 Block Diagram Analysis 3 1 3 8 Circuit Descriptions 3 1 3 25 Accuracy 3 2 4 MAINTENANCE 4 1 4 1 Introduction 4 3 Service Information 4 6 General Maintenance 4 15 Test Equipment Required for Maintenance 4 1 4 1 4 1 4 1 1 1 Introduction 1 2 General Description 1 6 Electrical Specifications 1 7 Mechanical Specifica...

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Page 7: ...ooting 4 5 5 LIST OF REPLACEABLE PARTS 5 1 5 1 Introduction 5 j 5 3 Columnar Information 5 1 5 4 How to Obtain Parts 5 1 5 7 Serial Number Effectivity 5 2 APPENDIX A FEDERAL SUPPLY CODE FOR MANUFACTURERS APPENDIX B LIST OF ABBREVIATIONS APPENDIX C SALES REPRESENTATIVES AND SERVICE CENTERS SCHEMATIC DIAGRAMS ii Rev 1 ...

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Page 9: ... 3 1 Model 41 SB Block Diagram 3 3 4 1 Test Equipment Required for Maintenance 4 2 4 2 Protection Circuit 4 3 4 3 Linearity Test 500 100 10 Volt Steps 4 4 44 Ripple on 125 Volt Supply 4 6 4 5 Ripple on High Voltage DC Output 4 8 5 1 High Voltage Power Supply 54 5 2 Chassis Assembly 5 6 5 3 Front Panel Assembly 5 7 54 Switch P C Assembly 5 9 5 5 High Voltage Rectifier P C Assembly 5 12 5 6 Series P...

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Page 13: ...odes together with the high voltage hand ling characteristics of vacuum tubes provide a depend able low noise level highly regulated output Applica tions of the Model 415B include calibration of voltmeters and powering of photomultiplier tubes high voltage klystrons or other devices with current requirements up to 30 milliamperes 1 6 ELECTRICAL SPECIFICATIONS OUTPUT VOLTAGE Adjustable from 0 to 31...

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Page 15: ...l to 10 000 feet STORAGE OR SHIPPING ALTITUDE Sea level to 50 000 feet VIBRATION Meets MIL T 945A SHOCK Meets MI L E 4 97 0A 20 g s 11 milliseconds in three principal axes TEMPERATURE COEFFICIENT OF OUTPUT Less than 20 ppm per C from 10 C to 40 C STORAGE TEMPERATURE 20 C to 70 C HUMIDITY 0 to 80 1 9 OUTLINE DRAWING 1 10 Figure 1 1 is an outline drawing showing all dimensions necessary for mounting...

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Page 17: ...guidelines for handling them 3 Using the procedures and packaging and bench techniques that are recommended The Static Sensitive S S devices are identified in the Fluke technical manual parts list with the symbo The following practices should be followed to minimize damage to S S devices 1 MINIMIZE HANDLING 2 KEEP PARTS IN ORIGINAL CONTAINERS UNTIL READY FOR USE 3 DISCHARGE PERSONAL STATIC BEFORE ...

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Page 19: ...SOLDERING IRONS SHOULD BE USED Anti static bags for storing S S devices or pcbs with these devices on them can be ordered from the John Fluke Mfg Co Inc See section 5 in any Fluke technical manual for ordering instructions Use the following part numbers when ordering thesespecial ba9 s 1 Dow Chemical John Fluke Part No 680892 680934 680942 680983 681023 Pink Poly Sheet 30 x 60 x 60 Mil P N RC AS 1...

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Page 21: ...ert the instrument from 115 to 230 volt operation proceed as follows Electrical changes are shown on the decal on the underside of the top cover and on the schematic in the back of this manual a Remove the jumpers between 1 and 2 and between 3 and 4 b Connect a jumper between terminals 2 and 3 c Change the fuse from a 3 ampere slow blow to a I 5 ampere slow blow 2 9 INITIAL OPERATION 2 10 The foll...

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Page 23: ... LAMP Illuminates when high voltage is available at OUTPUT connectors POWER LAMP Illuminates when power is applied to control circuit and transformer HIGH VOLTAGE SWITCH Applies voltage to high voltage rectifier when STDBY RESET lamp is illuminated HIGH VOLTAGE STDBY RESET LAMP indicates completion of time delay by illuminating 30 seconds after line power is applied HIGH voltage switch must be in ...

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Page 25: ...the HIGH VOLTAGE switch is set to ON In this case step d above would follow step f If the HIGH VOLTAGE switch is set to ON immedi ately after the STDBY RESETlamp illuminates any overload will cause the output voltage to oscillate between ON and STDBY RESET The oscillation can be stopped or prevented by cor recting the overload condition g To remove the high voltage from the output con nector set t...

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Page 27: ... extinguish and the HIGH VOLTAGE ON lamp will illuminate f Null the differential voltmeter by adjusting the OUT PUT VOLTAGE dials The accuracy of the voltage measured is from 0 01 to 0 05 depending on the accuracy of the differential voltmeter used g Set the HIGH VOLTAGE switch to STDBY RESET h Repeat steps d through g for as many calibration points as desired 2 16 For calibration of instruments f...

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Page 29: ...415B Figure 2 3 OPERATION WITH A REFERENCE DIVIDER Rev 1 2 5 ...

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Page 31: ...ne leakage current at high voltage in insulators capacitors and test instruments Proceed as follows a Connect the equipment as shown in Figure 2 4 The protection circuit shown in Figure 2 4 provides pro tection to the voltmeter by limiting the input to less than one volt in the event of a short in the component under test The resistors must be non inductive composition Allen Bradley type b Set the...

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Page 33: ...e output voltage con stant The front panel meter provides an indication of output level 3 8 CIRCUIT DESCRIPTIONS 3 9 Time Delay 3 10 When the POWER switch is set to ON ac is applied to the series pass tube filaments and to the auxiliary supply There is a 30 second delay before high voltage can be supplied This permits the auxil iary voltages to reach operating level and insures that voltage contro...

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Page 35: ...ltages of 95 20 10 and 110 volts The raw dc 125 volt output of the supply is fed to the regulator on the Amplifier P C Assembly 3 21 125 Volt Regulator 3 22 The 12 1 volt regulator consists of Ql through Q5 and their associated circuitry on the Amplifier p C Assembly CH and Q5 comprise a differential amplifier Q2 is an emitter follower regulator which serves as a 100 volt source for the emitter of...

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Page 37: ...SUPPLY BIAS VOLTAGES ERROR AMP REFERENCE TUBE SERIES PASS TUBES OVER CURRENT CIRCUIT PREFERENCE DIVIDER j DC OUTPUT VOLTAGE CONTROL RESISTORS D OUTPUT VOLTAGE CONTROL SIGNAL TIME DELAY CONTROL SIGNAL Figure 3 1 MODEL 41 5B BLOCK DIAGRAM ...

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Page 39: ...e a 1 000 ohm 2 watt resistor in the shorting lead 4 8 Cleaning 4 9 Periodic cleaning of the Model 415B is desirable Any contamination particularly on the high voltage capacitors will cause corona discharge which will appear as noise in the output voltage Removal of dust with low pressure compressed air or a vacuum cleaner should be all that is normally required 4 10 Components may be cleaned usin...

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Page 41: ...e performance of the Model 415B These tests may be used for incoming inspection periodic inspection and precalibration checks It is recommended that these tests be performed after circuit repair and before each calibration 4 20 The load line and ripple checks do not depend on any calibration adjustments and a fault detected by testing can usually be isolated by performing the checks in the subsect...

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Page 43: ...vary with contact resistance Make comparative readings with load on front and back output terminals f Disconnect the load resistor and see the POLARITY switch to negative g Repeat the measurements of steps d and e 4 26 RIPPLE This test determines whether the residual ac component superimposed on the dc output is within specified limits Ripple is usually higher with negative polarity output Proceed...

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Page 45: ...crewdriver to adjust R26 With negative output polarity the case of this resistor is 83 volts above chassis ground With positive polarity output the case would be 3083 volts above chassis ground e If the potentiometer is at its limit or the adjustment can not be achieved refer to paragraphs 4 46 and 4 48 f Set the POLARITY switch to Positive and observe that the output is within the limits of step ...

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Page 47: ...c approach to trouble shooting is followed A good understanding of the prin ciples of operation is necessary to efficient trouble shooting and it is recommended that you review Section IH before attempting to troubleshoot the instrument in detail 4 38 The following troubleshooting procedure is in such sequence that it can be applied to any unit in cluding one in which the trouble is totally unknow...

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Page 49: ...volt age should be between 120 and 130 volts Over a line voltage range of 103 to 127 volts the dc output should vary less than 2 5 millivolts from the in dication at 115 volts d the 125 volt supply fails to regulate or the value of output voltage is incorrect refer to paragraph 4 46 5 MS CM Figure 4 4 R IPPLE ON 1 25 VOLT SUPPLY 4 43 ERROR AMPLIFIER CHECK This procedure determines quickly whether ...

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Page 51: ... across Rl R2 and R3 on the Switch P C Assembly One or more of these jumpers may have been removed in the original factory calibration b Connect the differential voltmeter between the cathode of CR2 on the Amplifier P C Assembly and chassis ground and measure the output of the reference tube VI The output of the reference tube should be between 83 3 and 85 05 volts e The transistors may be checked...

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Page 53: ...lows POWER POLARITY OUTPUT VOLTAGE dials OFF Negative First dial to 2500 second dial to 500 others to zero b Connect a 0 05 microfarad 5000 volt capacitor and the protection circuit shown in Figure 4 2 in series between the OUTPUT connector and the input of a preamplifier Gain 100 Connect the pre amplifier output to the input of an oscilloscope c Set the POWER and HIGH VOLTAGE switches to ON and o...

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Page 55: ...ber which uniquely identifies the item to the original manufacturer is listed in the MFR PART NO column If a component must be ordered by description the type number is listed f The TOT QTY column lists the total quantity of the item used in the instrument Second and subsequent listing of the same item are referenced to the first listing with the abbreviation REF In the case of optional subassembl...

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Page 57: ...howing its location to other parts of the instrument is usually most helpful A Model 415B serial number 488 thru 688 691 thru 693 696 697 699 thru 713 715 and 716 B Model 415B serial number 689 690 694 695 698 714 717 and on 5 7 SERIAL NUMBER EFFECTIVITY C Model 41 5B serial number 689 690 694 695 698 714 717 thru 1779 5 8 A Use Code column is provided to identify certain parts that have been adde...

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Page 59: ...sembly See Figure 5 4 High Voltage Rectifier P C Assembly See Figure 5 5 Series Pass P C Assembly See Figure 5 6 Amplifier P C Assembly See Figure 5 7 Bleeder P C Assembly See Figure 5 8 Connector Type BNC accessory not illustrated 1702 219873 89536 1702 219873 415A 4001 1702 219881 89536 1702 219881 415A 4002 1702 219899 89536 1702 219899 415A 4003 1702 219907 89536 1702 219907 415A 4004 1702 219...

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Page 63: ...9536 6005 102822 Switch wafer OUTPUT VOLTAGE Switch interlock spdt Transformer power 1 15 230V Transformer power 100 115V Coupler A3R23 Cover top not illustrated Detent assembly switch S3 Detent assembly switch S4 Detent assembly switch S5 S6 Detent assembly switch S7 Foot rubber not illustrated Plate switch locating between detents and front panel 5107 167817 76854 Type HC 1 5104 115196 01963 E13...

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Page 65: ...415B Rev 1 Figure 5 2 CHASSIS ASSEMBLY ...

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Page 67: ... 1 FI Fuse slow blow 1 1 2 amp 250v for 230v operation not illustrated 5101 109231 71400 Type MDX 1 1 J1 Connector female Type BNC 2106 162982 95712 3651 2 REF Ml Meter 500 0 500 ua 50Q 2901 221721 89536 2901 221721 1 SI Switch POWER toggle dpst 5106 114835 04009 81024 GB 1 S2 Switch HIGH VOLTAGE toggle dpdt 5106 157883 73559 2GL50 63 1 XF1 Holder fuse 2102 100107 71400 HKP 1 11 Handle chrome plat...

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Page 69: ... met flm lk 1 l 2w 4705 151324 R21 Res met flm lk 1 l 2w 4705 151324 R22 Res met flm 499ft 1 l 2w 4705 151514 R23 Res var ww 600ft 10 2w 4702 155523 R24 Res met flm 2 67M 1 2w 4705 169391 R25 Res met flm 2 67M 1 2w 4705 169391 R26 Res var ww 500ft 10 l l 4w 4702 113258 R27 Res met flm 405 1 l 2w S3B Switch section OUTPUT VOLTAGE 5107 167809 S4 Switch section OUTPUT VOLTAGE 5107 155978 89536 1702 2...

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Page 71: ...4158 Figure 5 4 SWITCH P C ASSEMBLY Re 5 9 ...

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Page 75: ...dpdt 230 vac 4504 221234 89536 4504 221234 1 K3 Relay armature dpdt 230 vac 4504 220111 89536 4504 220111 2 2 K4 Relay armature dpdt 230 vac 4504 220111 89536 4504 220111 REF R1 Res comp 68k 10 Iw 4704 109629 01121 GB6831 1 R2 Res comp 39052 10 2w 4704 110049 01121 HB3911 1 R3 Res comp 1052 10 l 2w 4704 108092 01121 EB1001 2 R4 Res comp 10052 10 2w 4704 109934 01121 HB1011 1 R5 Res var ww lk 20 l ...

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Page 77: ...5 5 HIGH VOLTAGE RECTIFIER P C ASSEMBLY Rev 1 ...

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Page 79: ...er lOv 4803 113324 07910 1N961A REF CR6 Diode zener llOv 4803 168104 04713 1N3045A 1 1 O Tstr silicon PNP 4805 218388 07263 2N3645 3 2 Q2 Tstr silicon PNP 4805 218388 07263 2N3645 REF Q3 Tstr silicon PNP 4805 218388 07263 2N3645 REF Q4 Tet r j s t con NPN Ri 1 3U STTICOn JN FN 1 UTfi S b MW fttZ Res comp 22Q 10 l 2w 4704 108670 f S3C 01121 EB2201 1 R2 Res comp 10S2 10 l 2w 4704 108092 01121 EB1001...

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Page 81: ...415B 1 ES PASS P C ASSEMBLY ...

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Page 83: ...p 270ft 5 l 2w 4704 159616 01121 EB2715 1 R16 Res comp 680ft 10 l 2w 4704 108712 01121 EB6811 1 R17 Res comp 47k 5 l 2w 4704 108738 01121 EB4735 REF R18 Res comp 4 7k 10 l 2w 4704 108381 01121 EB4721 2 VI Tube tested type 8068 5701 156422 89536 5701 156422 2 2 V2 Tube tested type 8068 5701 156422 5701 156422 REF Use part number 4805 168716 as Q4 replacement for all serial numbers Rev 1 5 15 ...

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Page 85: ...er I2v 4803 159780 07910 1N759 1 CR2 Diode silicon 1 amp 100 piv 4802 116111 05277 1N4S17 2 CR3 Diode silicon 1 amp 100 piv 4802 116111 05277 1N4817 REF CR4 Diode silicon 1 amp 600 piv 4802 112383 05277 1N4822 REF CR5 Diode silicon 1 amp 600 piv 4802 112383 05277 1N4822 REF DS1 Lamp neon Type NE2E 3902 100347 71744 NE2E 2 DS2 Lamp neon Type NE2E 3902 100347 71744 NE2E REF Qi Tstr silicon NPN 4805 ...

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Page 89: ...TO 01121 EB1531 01121 EB3015 01121 EB8231 01121 EB3931 TOT REC USE QTY QTY CODE 4704 108126 01121 EB1041 1 4704 108381 01121 EB4721 REF 4704 108597 0112 1 EB1025 1 4705 151324 75042 Type CEC TO REF 4704 108258 01121 EB2741 2 4704 108258 01121 EB2741 REF 4704 108407 01121 EB1251 1 4704 108605 01121 EB2221 1 4705 151324 75042 Type CEC TO REF 4702 113092 71450 Type 110 REF 4704 218719 01121 3155 1567...

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Page 91: ... HB2251 REF R3 Res comp 2 2M 10 2w 4704 167304 01121 HB2251 REF R4 Res comp 2 2M 10 2w 4704 167304 01121 HB2251 REF R5 Res comp 2 2M 10 2w 4704 167304 01121 HB2251 REF R6 Res comp 2 2M 10 2w 4704 167304 01121 HB2251 REF H R7 Res comp 68 5 l 2w 4704 178384 01121 HB6805 1 5 fa Wire assembly Series Pass tube 6008 219980 89536 6008 219980 2 6r 1 R1 tnOH MtOt ZJ HB nos r iLZ j au l r 7 Figure 5 8 BLEED...

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