HP-3484A-Manual-Multifunction-Unit 电路图.pdf

《HP-3484A-Manual-Multifunction-Unit 电路图.pdf》由会员分享，可在线阅读，更多相关《HP-3484A-Manual-Multifunction-Unit 电路图.pdf（98页珍藏版）》请在收音机爱好者资料库上搜索。

1、MODEL 3484A MULTIFUNCTION UNIT RadioFans.CN 收音机爱 好者资料库 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 RadioFans.CN 收音机爱 好者资料库 _J I N

2、0 0 I 0 N CJ 0STA0t! STAM! N!:Cf.SSAlV Ill MAILED 1 N UNITED STATES POSTAGE WILL BE PAID BY l . S T CLAS l - Model 3484A Section I SECTION GENERAL INFORMATION 1-1. INTRODUCTION. The hp Model 3484A Multifunction Unit, in conjunction with either the Model 3480A or 3480B Digital Voltmeter, makes 4-digi

3、t de voltage measurements, with up to 50% overrange capability. Full scale ranges of I 00 m V, IOOOmV, lOV, IOOV, and IOOOV may be selected manually, automatically, or remotely. Polarity selection and display arc automatic. The degree of filtering desired may also be selected manually or remotely. R

4、esistance and true rms ac voltage measurements may be made if Options 042 and 043 are added. 1-2. OPTIONS. 1-3. ISOLATED REMOTE OPTION 041. Option 041 provides remote programming connections which are isolated from the Model 3484A internal circuits. All external connections arc referenced to chassis

5、 (power line) ground. This option is available for field installation as -hp- Model 11151 A, Isolated Remote Assembly. Option 041 cannot be used unless the Model 3480A/B is equipped with Isolated BCD Output Option 004. 1-4. OHMS/DC CONVERTER OPTION 042. Option 042 allows the Model 3484A to make resi

6、stance measurements on six ranges of I 00 n, 1000 n, 10 kS1, 100kS1, 1000kS1, and JOMS1 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 l l l 52A, Ohms/DC Converter Assembly. 1-

7、5. TRUE RMS AC CONVERTER OPTION 043. Option 043 allows the Model 3484A to make true rms ac voltage measurements on five ranges of 100 m V, 1000 m Y, 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

8、 be selected manually, automatically, or remotely. This option is available for field installation as -hp- Model 11 I 53A, True RMS AC Converter Assembly. 1-6. SPECIFICATIONS. Complete specifications for the Model 3484A and 3480A/B combination are given in Table 1-1. 1-7. INSTRUMENT AND MANUAL IDENT

9、IFICATION. Hewlett-Packard uses a two-section serial number. If the first section (serial prefix) of the serial number on your instrument does not agree with those on the title page of this manual, change sheets supplied with the manual will define the differences between your instrument and the Mod

10、el 3484A described in this manual. Some serial numbers may have a letter separating the two sections of the number. This letter indicates the country in which the instrument was manufactured. 1-8. ACCESSORY EQUIPMENT AVAILABLE. 1-9. The Model 1 I I 48A Plug-in Extender Cable allows the plug-in unit

11、to operate outside the 3480A/B to facilitate servicing. 110. The Model 11149A Remote Programming Cable is 6 feet Jong and is terminated at one end by a connector which mates with the 3484A rear panel remote connector Jl4. The other end of the cable is unterminated. 1-11. For additional information r

12、egarding optional equip- ment, contact your nearest -hp- Sales and Service Office, listed in Appendix B. FILTER TERMINAL Figure 1-1. Model 3484A Multifunction Unit. 1 -1 Section I 12 Model 3484A Table 1-1. Specifications. The following specifications apply to the Model 3484A Multifunction Unit used

13、in the Model 3480A/B Digital Voltmeter. DC VOLTS Full Scale Voltage Ranges 50% Overrange capability on all ranges; maximum input 1200 V. Range Selection Automatic Ranging Polarity Selection and Display Voltage Accuracy 24 hours (23C 1c, less than 50% relative humidity) 90 days (25C s0c, less than 95

14、% relative humidity) Temperature Coefficient o 0c to 55c Measuring Speed Reading Period Reading Rate (without range change) Automatic Manual Trigger External Trigger Response Time Autorange Time 100 mV, 1000 mV, 10 V, 100 V, 1000 V Manual, Automatic, or Remote Upranges at 140% of range Down ranges a

15、t 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 ra

16、nges: (0.001 % of reading + 0.0005% of range)/0c 950 microseconds Variable from 1 to 25 per second with front panel control Front panel pushbutton 0 to 1000 per second Without range change: Filter out: 1 msec to within 1 count of final reading when triggered coincident with step input voltage. Filte

17、r A : 200 msec to within 1 count of final reading Filter B: 1 second to within 1 count of final reading Filter out: 4 msec per range change Filter A : 200 msec per range change Filter B: 1 second per range change 1 1 Model 3484A Table 11. Specifications (Contd). DC VOL TS (Cont di Input Characterist

18、ics Input Resistance Effective Common Mode Rejection (Ratio of peak common-mode voltage to resultant error in reading with 1 kilohm unbalance in either lead) DC AC Normal Mode Rejection (Ratio of peak normal-mode signal to resultant error in reading) Filter Selection Zero Offset Voltage Stability (a

19、t constant temperature) Voltage Temperature Coefficient (0c to ss0c1 Current 12s0c s0c1 Current Temperature Coefficient 10c to ss0ci Noise Maximum Input Voltage Between HIGH and LOW terminals Between LOW and GUARD terminals Between GUARD and Chassis 100 mV, 1000 mV 8nd 10 V ranges: Greater than 101

20、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 Les

21、s than 10 microvolts per week Less than 1 microvolt per 0c Less than 10 pA Less than 1 pA per 0c Less than 20 microvolts peak-to-peak (unfiltered). Peak-to-peak noise is less than 20 microvolts 95% of the time since the noise amplitude approximates a Gaussian distribution where the standard deviatio

22、n (rms value) equals 5 microvolts. 1200 V peak 200 V peak 500 V peak Section I 1-3 Section I Model 3484A Table 11. Specifications. (Contd) 14 OHMS (OPTION 042) Full Scale Ranges 50% Overrange capability on all ranges Range Selection Automatic Ranging Measurement Accuracy 24 hours (23C 1c. less than

23、50% relative humidity) 90 days 12s0c s0c, less than 95% relative humidity) Measuring Speed Reading Period Reading Rate (Without range change) Automatic Manual Trigger External Trigger Response Time (Full scale step input, without range change) Autorange Time Input Characteristics Voltage across unkn

24、own resistance Maximum current through unknown resistance 100 ohms, 1000 ohms, 10 kilohms, 100 kilohms, 1000 kilohms 10 megohms Manual, Automatic, or Remote Upranges at 140% of range Down ranges at 10% of range 1000 ohm thru 1000 kilohm ranges: (0.01% of reading + 0.01% of range) 100 ohm range: (0,.

25、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

26、second with front panel control Front panel pushbutton 0 to 1000 per second 100 ohm t hru 100 kilohm ranges (Filter out): 1 msec to within 1 count of final reading 1000 kilohm range (Filter A): 200 msec to within 1 count of final reading 10 megohm range (Filter A): 2 seconds to within 1 count of fin

27、al reading Note: Due to noise generated in the unknown resistance, filtering may be required for quiet readings with inputs greater than 100 kilohms. Response times for inputs below full scale, wit h filtering, are proportionately less t han those shown. Filter out: 4 msec per range change Filter A

28、: 200 msec per range change Filter B: 1 second per range change 1 V at full scale on all ranges 10 mA on 100 ohm range r - Model 3484A AC VOLTS (OPTION 043) Full Scale Voltage Ranges 50% Overrange capability on all ranges; maximum input 1500 V peak Range Selection Automatic Ranging Response Selectio

29、n of AC or DC Coupling Accuracy ( 10!6 to 150% of range; less than 108 Volt-Hertz) 24 Hours (23C 1c, less than 50% relative humidity 90 days (25c 5C. less than 95% relative humidity) Measuring Speed Reading Period Reading Rate (without range change) Automatic Manual Trigger External Trigger Response

30、 Time (Full scale step input, without range change) Autorange Time Input Characteristics Input Resistance Crest Factor Maximum Input Voltage Table 1-1. Specifications. (Contd) AC COUPLED VAC (AC) 100 mV, 1000 mV, 10 V, 100 V, 1000 V Manual or Remote Upranges at 140% of range Downranges at 1 0% of ra

31、nge Responds to true rms value of ac input signal. (Internally ac coupled) Manual or Remote 20 Hz to 1 MHz: (0.05% of reading + 0.02% of range) 20 Hz to 1 MHz: :(0.05% of reading + 0.05% of range) 950 microseconds Variable from 1 to 25 per second with front panel control Front panel pushbutton 0 to

32、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 1 500 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,

33、1000 V Manual or Remote Upranges at 140% of range Downranges at 10% of range Responds to true rms value of ac and de input signal. Reading = V!DC) 2 + (ACrms)2 With external 10 microfarad coupling capacitor, responds to ac component only, for measurements down to 1 Hz. Manual or Remote DC: 0.1% of r

34、ange 1 Hz to 10 Hz: 1% of reading 10 Hz to 20 Hz: (0.1% of reading + 0.05% of range) 20 Hz to 1 MHz: (0.05% of reading + 0.02% of range) DC: 0.5% of range 1 Hz to 10 Hz: 1% of reading 10 Hz to 20 Hz: (0.1% of reading + 0.05% of range) 20 Hz to 1 MHz: (0.05% of reading + 0.05% of range) 950 microseco

35、nds Variable from 1 to 25 per second with front panel control Front panel pushbutton 0 to 1000 per second 15 seconds to within 5 counts of final reading 3 seconds per range change 2 megohms 1% 7:1 at full scale 70: 1 at 10% of full scale 1500 V peak ac 1500 Vdc 1500 V maximum ac +de (peak) 1-5 Secti

36、on I Ratio (3480A/B Option 0021 Display is proportional to the ratio of the input de voltage, ac voltage, or resistance to the external + 10 Vdc or + 100 Vdc reference voltage applied to rear panel Ratio terminals. Ratio accuracy (+ 10 Vor + 100 V) 5% reference input: Same as accuracy specifications

37、 for basic function. (+ 10 V or + 100 VI + 5% to + 35% or(+ 10 V or + 100 VI - 5% to - 13% Reference input: Add 0.02% of reading to basic accuracy specifications. Ratio (Reference) Input Characteristics 1-6 Input Voltage: + 10 V or + 100 V referenced to circuit common and Low side of unknown input.

38、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: o0c to 55C Storage Temperature: -40c to+ 75c Options and Accessories Available Option 041, Is

39、olated Remote Control (Requires 3480A/B Option 0041 Option 042, Ohms Converter Option 043, True rms AC Converter Other Accessories Available Plug-in Extender Cable (for servicing plug-in units) Remote Program Cable (for all plug in units) Model 3484A - Model 11151A Model 11152A Model 11153A Model 11

40、148A Model 11149A Model 3484A Section Il SECTION II INSTALLATION 2-1. INTRODUCTION. This section contains information and instructions nec- essary for installing the Model 3484A Multifunction Unit in the Model 3480A/B Digital Voltmeter. In addition, in- structions are given for installing the availa

41、ble options in the 3484A. This section also includes initial inspection procedures and instructions for repackaging for shipment. 2-2. INITIAL INSPECTION. This instrument was carefully inspected both mechanically and electrically before shipment. It should be free from mars or scratches and in perfe

42、ct electrical order upon receipt. To confirm this, the instrument should be in- spected for physical damage in transit, and the electrical performance should be tested using the procedure outlined in Paragraph S-3. If there is damage or deficiency, see the warranty inside the front cover of this man

43、ual. 2-3. INSTALLATION. Instructions for installing the Model 3484A in the 3480A/B Digital Voltmeter are given in Figure 2-1. Installation instructions for the Model 3480A/B are given in the 3480A/B Operating and Service Manual. 2-4. INSTALLATION OF ISOLATED REMOTE OPTION 041. The following procedur

44、e gives instructions for installing the Model 111 SI A Isolated Remote Assembly (Option 041) in the 3484A. If it is desired to operate remotely a 3484A having Isolated Remote, in a 3480A/B that does not haye Isolated BCD Option 004, remove the Isolated Remote Assembly by reversing the installation p

45、rocedure. a. Visually check the assembly to make sure that the molded coils offset from one printed circuit board are 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 TOUCH

46、ED. DIRT OR FINGERPRINTS CAN CAUSE CONTAMINATION 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 cable attached, from printed circuit connector JS on the top side of the mas

47、ter board, near the rear of the instrument. d. Hold the Isolated Remote Assembly as near as possible to the position it will occupy in the 3484A and insert the small printed circuit board into printed circuit connector J4. See Figure 2-2. e. Insert the other end of the Isolated Remote Assembly into

48、connector JS on the master board. f. If the 3484A has Option 043 true rms ac converter installed, remove hold down screws and tilt the ac converter assembly so that the master board is accessible. g. Secure the Isolated Remote Assembly by instaJUng a screw through the master board into the spacer on the Remote Assembly. This screw should be a 6-32 x 1/4 pan head pozidriv machine screw with lockwasher, -hp Part No. 2360-0113. h. Replace ac converter assembly. i. Replace top and bottom guard covers. 2-5. INSTALLATION OF OHMS CONVERTER OPTION 042. a. Remove 3484A top guard cover. WEAR CLEAN R