HP-2S-Manual-Moseley 电路图.pdf

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1、I . : HP Archive . . This vintage Hewlett Packard document was preserved and distributed by www. Please visit us on the web ! . . On-line curator: Tony Gerbic RadioFans.CN 收音机爱 好者资料库 OPERATING with this switch in the Time11 position, the X-axis operates as a time base with sweep ranges (in seconds)

2、corresponding to millivolt values on the switch selector scale. Sweeps available in the standard Model 2s are 7. 5, 15, 75, 150, and 750 seconds for full scale X-axis pen travel. m e n operating with the sweep circuit, variations in full scale time intervals of up to five times the calibrated values

3、 may be ob- tained by placing the X-range expander switch in the VAR1f position and adjusting the top knob of the range control. Use in this manner will not disturb the basic calibration of the timing circuits. With the Volts-Time switch (on the rear function e. Zero-Setting Controls . The zero-sett

4、ing controls are located on the control panel and consist of 10-turn potentiometers with counting dials. controls the electrical zero of the instrument can be set anywhere on the paper, or up to one scale-length to the left and below the lower-left hand By means of the zero- setting 8 h. corner of t

5、he paper regardless of the scale range setting. Hence, through proper adjustment of the controls, data can be plotted in any desired quadrant. A locking lever prevents the control knob from turning while the instrument is in operation. Pen Lift Switch The pen lift switch is at the bottom left of the

6、 control panel. down position it applies power to a relay on the carriage track mount to release a spring and lever mech- anism normally holding the pen from the paper. tion is furnished to provide automa- tic pen operation with the sweep switch. Power must be ION for the pen solenoid to operate; th

7、us with power removed from the in- strument the pen will always be in In the A lkemote posi- -Y RANGE SELECTOR -Y VARIABLE RANGE EXTENDER -Y FIXED-VARIABLESWITCH -LOCKING LEVER -Y ZERO CONTROL -X RANGE SELECTOR -X VARIABLE RANGE EXTENDER -X FIXED-VARIABLE SWITCH -LOCKING LEVER - X ZERO CONTROL -PEN

8、LIFT SWITCH -SWEEP SWITCH Control Panel, Mod. 2s Fig. 4 a non-writing position. point plotting, the contacts of the switch being shunted, through the con- nections to the point plotter receptacle, by an external accessory which supplies a rplottr signal. The UP position of this switch is also used f

9、or Time Interval Actuator Switch When using the time base feature, initiation of a selected time sw tion for the X-axis is accomplished with the toggle switch to the 1 : the pen lift switch. Movement of this switch down starts the tim Val; restoring to center position resets the circuit for the next

10、 op Remote position of the -,zn lift switch parallels internal contacts multaneous pen and sweep operation. Curve Follower - Record Switch reep ac- sight of e inter- er ation. for si- This control is located on the small panel at the rear of the machine. When the Autograf is used as a recorder the R

11、ecord-Follow switch must be in the Record position. fier is switched to the Curve Follower (C. F. )adapter receptacle located on the input plug panel. When in the Follow posttion the Y axis ampli- 9 i. Input Filter Switch The input filter switch is located on the rear exposed panel. two positions pr

12、oviding the following filter characteristics: This switch has Position 1: Normal: Low pass filter with 26 db of attenuation at 60 cycles and rapid cut-off at higher frequencies. With- out impairing normal re- corder performance, use of this filter will eliminate most forms of undesirable noise often

13、 present in labo- ra tor y test s e t-up s. Position 2: Maximum: Low pass filter with additional capacity re- sulting in more rapid cut-off at low frequencies. In this position it is ,possible to plot the output of an unfilter- Rear Function Panel, Mod. 2 s Fig. 5 ed half-wave 60 cycle rectifier. CA

14、UTION: When using this filter the recorder must be operated much slower than normal to avoid plotting errors caused by filter delay. Paper Requirements Recording is done on standard 11 x 16- 1/2 graph paper; the scales on the machine are accurately aligned with Moseley H- 100150, 10 x 10 to the inch

15、, or other similar papers may be used, such as Dietzgen #340 D- 10. k:- PenA s s embly 1. The pen assembly consists of a drum-type ink reservoir resting in a pivot mount which moves along the carriage beam. line leads from the reservoir to the point. paper by a lever system which is released by a re

16、lay. A rigid capillary tube feed The pen is raised from the Carriage Assembly . . The carriage assembly consists of an inverted rlUl beam with tracks on either side for the pen mount rollers and a rear pulley for the pen mount cable, a spring-loaded, roller-mounted !IT- squaret1 type carriage mount

17、which is cable-driven along a track at the lower front of the recording table, and a non-guiding roller mount at the rear. The drive sheave for 10 the pen mount cable is housed in the carriage mount. coupled to its drive spline shaft, assuring bind-free carriage travel. It is bellows- PEN LIFT BAR C

18、APILLARY FEED LINE DRUM TYPE RESERVOIR ECCENTRIC -MOUNTED ADJUSTING ROLLER Pen Assembly Fig. 6 2. ELECTRICAL DATA Po we r Re quire ment s : from 220 volts and/or 50 cps are available on special order. performance the third prong of the AC power cord should be grounded. 115 volts, 60 cps, single phas

19、e, approximately 100 voltamperes. Special models operating For optimum Vacuum Tubes: Standard RETMA vacuum tubes are used as follows : 4 12AX7 Twin Triodes 4 12AB5 Beam Power Amplifiers Input Data Signals: the original information. The input signals must vary at a rate within the response capabiliti

20、es of the machine and have amplitudes within the scale ranges of the recorder. An appropriate input filter setting may be used to render the input reasonably free of AC ripple or other transient disturbances. CAUTION: Input voltages in excess of 500 volts should not be used. The Autograf input termi

21、nals must be supplied with DC signals which are linear functions of Input Connections: fie right side of the instru- drain is required, the machine may be used as a self-balancing potentiometer by disconnecting the binding post straps located on the small panel at the rear of the machine. The input

22、panel is on ment. In operations where minimum current When these straps are removed the input voltages bypass the input I T attenuators and the full sensitivity of the instrument is utilized. controls should be in the 5 and 7. 5 mv positions and the source resistance should be 1500 ohms or less. red

23、uce the servo dead zone, particularly if the source resistance is high. It should be noted with these straps removed and nothing connected to the input terminals, the servos will not operate. The attenuator The amplifier gain may have to be increased to Grounding: A chassis ground terminal is locate

24、d near the two sets of input terminals. terminal the instrument may be connected to a common grounding point with the apparatus under test. By use of this Y AXIS BATTERY (E-1008 a I O I B ) Y ATTENUATOR(R-IOOB a 1 0 9 ) P COMPONENTS Y ZERO POT. (R-119B) X ATTENUATOR (R-IOOA THRU 109A) X ZERO POT (R-

25、119A) X AXIS BATTERY(B-1008 IOIA) INPUT FILTER BOARD BATTERY RELAY( K-100) lOTOR DRIVE UNIT (M-1006) AMPLIFIER -5-107 -J-108 J-102 J-IO3 ; _ L G N D . R-121 B -J-104 Side View, Mod. 2 s Fig. 7 3. PERFORMANCE DATA Accuracy and Re solution: Response Speeds: As shipped from the factory, the Autograf ha

26、s initial accuracy of .25% of full scale on all ranges. Resolution is within this figure. Both axes have identical response, requiring a maximum of 1 second for full scale travel. The pen traverses the 11 side of the ,paper; the carriage moves along the 16-1/2 side. Voltage Ranges and Each axis of t

27、he Model 2s Autograf provides variable selector switch and potentiometer can be used to continuously extend the maximum voltage acceptable by each range about 5 times. The X axis ranges are 0 to 7.5, 15, 75, 150 and 750 millivolts; 0 to 1. 5, 7. 5, 15, 75 and 150 volts. The Y axis ranges are 0 to 5,

28、 10, 50, 100 and 500 millivolts; 0 to 1, 5, 10, 50 and 100 volts. The X axis scales from 7. 5 mv to 15 volts have an input sensitivity of 133,333 ohms per volt. axis scales from 5 mv to 10 volts, have an input sensitivity of 200,000 ohms per volt. The 50, 75, 100 and 150 volt scales have an input se

29、nsitivity of 200,000 ohms per volt. have an input resistance of 2 megohms. used, sensitivity is decreased only if the input voltage actually exceeds the fixed range setting. for all fixed ranges are as follows: Sensitivity: 10 voltage ranges. In addition, the fixed- The Y The 50, 75, 100 and 150 vol

30、t scales If the variable range extender is The sensitivity, input resistance, and full current drain I Range Sensitivity (ohms/volt) Y axis: 5 mv 200,000 10 mv 200,000 50 mv 200,000 100 mv 200,000 500 mv 200,000 1v 200 , 000 5v 200 , 000 10 v 200 , 000 50 v 40 , 000 100 v 20 , 000 X axis: 7.5mv 133,

31、333 15 mv 133,333 75 mv 133,333 150 mv 133,333 750 mv 133,333 1 . 5 133,333 7.5v 133,333 15 v 133,333 75 v 26,667 150 v 13, 3.33 Full Scale current drain (micro -ampe re s) 5 5 5 5 5 5 5 5 25 50 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 37.5 75 Input (ohms) re si stanc e 1 , 000 2,000 10,000 20 , 000 100 , 00

32、0 200,000 1,000 , 000 2,000 , 000 2,000,000 2,000 , 000 1 , 000 2 , 000 10,000 20,000 100,000 200 , 000 1,000,000 2,000,000 2,000 , 000 2,000,000 13 X-Axis Sweep Ranges and Linearity: Sweep ranges correspond numerically in seconds to the millivolt ranges on the X-range selector scale. These sweeps,

33、for full scale travel, are A variation of up to five times the indicated Sweep linearity is governed by the cir- 7. 5, 15, 75, 150, and 750 seconds. fixed intervals may be obtained by operation of the X-range expander control with the switch in the llVAR1f position. cuit constants and normally does

34、not vary more than t 270. - Calibration Stability: Short term calibration drift of the Autograf is negligible. Long term calibration change due to aging of the reference cells will accrue at the rate of .25% each 6 months. During the 12 to 18 months expected life of the reference cell, this drift ca

35、n be compensated by recalibrating the recorder when maximum accuracy is required. Calibration procedure is given in the Maintenance section of this manual. 14 Calibration Stability: (Sweep Range s) facture. operation of the time base. life of the reference cells. Sweep intervals are established by s

36、pecial com- ponent selection for each instrument during manu- Initial accuracy will be maintained during the normal The reference cells used for axis calibration also supply voltage for RRIME #Ay 8CREW 8TABILItIWO DOLUU CAILC CA88AOL THRU MOUNT BC LLQWI- COUPLED SWWC 8HfAVf CABLE THREAD H O u I Rear

37、 View, Model 2s Fig. 8 . SECTION I1 - OPERATION A. OPERATING INSTRUCTIONS (As two-axis recorder) For sa.iisfactory operation of the Autograf the phenomena to be recorded must: a. Be reduced to direct current, the available voltage being a linear function of the original information. b. Have amplitud

38、es within the scale ranges of the recorder (XT input; 7. 5 mv to 150 v; Y input: 5 mv to 100 v; range can be extended to 500 v, each axis). c. Vary at a rate within the response capabilities of the instrument. Frovided the above signal conditions are met, the Autograf maybe placed into operation as

39、follows: 1. Connect the power cord to a 115 volt, 60 cps line and turn the unit on by moving the Power switch to the IlUPtt position. that power is applied. The pilot light will indicate 2. Place ink in the pen reservoir. Do not completely fill the reservoir and use Esterline-Angus recording ink onl

40、y. pen tip. This is done using a hypodermic syringe. Apply a syringe to the filler hole to force i n k through to the 3. Load paper as follows: a. Place pen lift switch in I1UPt (vertical) position so that pen is off the paper. b. Turn the servo switch OFF. (down position). c. Push the carriage by h

41、and to approximately 4 from the left-hand end of the recording table. d. Slide paper under the carriage onto the paper bed. e. Align paper with table edge scales. f. Turn vacuum switch rrON1l. and smooth out paper surface. Readjust alignment of paper with scales g. When paper is to be removed, turn

42、off vacuum switch to save wear on P-P. 4. Connect the X and Y components of the data to be recorded to the X and Y input terminals and set the scale range switches to the expected maximum value s. 15 5. 6. 7. With the pen lifted from the paper, turn the right-hand toggle switch (servo switch) to the

43、 TJP position to energize the two servos, and move the Record-Follow switch to the Record position. dry run through its range and its position on the paper set by adjusting the Zero-setting controls 2 s desired. paper and the data run through its range to produce the desired record. To establish acc

44、urate zero offset in the Y or X axis connect the desired offset voltage to the appropriate input terminals and adjust the zero setting control so as to bring the carriage or pen index into exact agreement with the 0 mark on the corresponding scale. The input data can now be The pen may now be lowere

45、d to the The right-hand, servo-energizing, toggle switch applies 115 volt, 60 cps power to the fixed phase windings of the two drive motors, and 6. 3 volts to the chopper. PO sition whenever the Autograf is not being operated, thereby lowering power dissipation, and avoiding unnecessary wear of the

46、balancing poten- tiometers and other mechanical parts. This switch should be placed in the stand-by, or rOFF When a voltage in excess of the scale setting is applied to either input terminal the servo will move quickly to one end of travel and strike the drive mechanism stop. from damage. which allo

47、ws the motor to continue running until the data signal is reduced to an on-scale value. the stops for prolonged periods as heating of the motor and excessive clutch wear may result. These stops protect the balancing potentiometers The driving mechanism also incorporates a slip- clutch The Autograf s

48、hould not be allowed to run against B. OPERATING INSTRUCTIONS (Using X-axis as TIME BASE) 1. 2. 3. 4. 5. 6. P Prepare recorder as in steps 1 through 3 of paragraph A. above. Connect data to be recorded to Y input terminals. Place function switch (on rear panel) in TIME position. Select total time in

49、terval desired on combination X-range switch. Data may now be dry-run as in step 5, paragraph A by operating TIME switch to ST. mote position and movement of TIME switch to IST automatically low- ers pen and starts the sweep action. Observe precautions outlined in steps 6 and 7, paragraph A. When recording is desired, place pen-lift switch in re- L. TYPICAL RECORDING FERFORMANCE 8