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Summary of Contents for 510

Page 1: ... MODEL 510 MEGOHMMETER AND ACCESSORIES KEITHLEY INSTRUMENTS INC CLEVELAND OHIO ...

Page 2: ...eable parts list APPENDIX Accessories i Model 51 036 Test Leads Model 5101 Component Adapter Model 5102 Volume Reoistivity Adapter Models 51024 and 51060 Cables Measuring technique ii Introduction Speed of indication Component measurements Volume resistivity Special shielded enclosures Use of other than standard test potentids ASTMReprint Rear Cover 510 If58 ...

Page 3: ...conventiona ohmmeter is eliminated An accuracy within l of the scale length is maintained at every point on the scale this is equivalent to an accuracy of about lO of the reGiotance being measured It is limited only by the meter accuracy and is about as good a6 conventional megohmmeter circuits at mid scale but superior to conventional circuits at other than mid scale meter readings Test potential...

Page 4: ...e and pro electrification when desired PR0TECTIVEFEATURNS All test potentials are removed when the operating switch is in the discharge position Similarly a switch is included in the test fixtures Models 5101 and 5102 that automatically grounds al 1 electrodes when the cover is raised The instrument cannot be damaged by short circuits ACCESSORIES SUPPLIED Model 51036 Test Leads 36 inches long sepa...

Page 5: ...ENANCE Section IV The power supply comprises a Sola regulating transformer a rectifier filter system and a two stage electronic regulator Selenium rectifiers SR5 through SR9 provide a half wave rectified output which is filtered by R401 c402 and C403 R Q and X403 are used to equalize the voltage across the series capacitors Following the filter is an electronic regulator employing 6 as a series tu...

Page 6: ...used in the Model 510 and ite proper functioning depends upon a constant power line frequency of 60 cps A 50 cps model is available b Turn the Test Charge Discharge switch to Discharge c Turn the Calibrate Test Potential switch to Calibrate 107 ohms a Turn the power switch to ON and wait a minute or two for the tubes to reach operating temperature e Set the Cal 107 potentiometer located on the pan...

Page 7: ... ha8 been operating for about five minutes it should be realigned to eliminate the effects of warmup drift After this ha8 been done no more calibrations should be necessary during the following eight hour period m To rebalance the amplifier eet the Calibrate Test Potential switch to 5 volts end the Test Charge Discharge switch to Discharge Then adjust the Amp Bal potentiometer reads 107 on the lef...

Page 8: ...rcumstances even though the tubes in the regulator have been changed but it should be checked after a tube change The tubes used in the V2 and V3 positions are selected matched and labelled 5886 5 and 5886 6 respectively Replacements are sold in pairs only The tube used at Vl is not selected When inspecting or replacing the electrometer tubes the glass base should not be touched with the hands bec...

Page 9: ...i Y 5 ...

Page 10: ...c T VOLTAGE AND RESISTANCE WART ...

Page 11: ...eas cho6 Sameas 406 Capacitor tubular electrolytic 150 mfd 15OV Sameas 406 Sameas C405 Capacitor tubular electrolytic 4 mf d 600 Fuse 1 5 amp 3AG Panel meter O 200 microamp Resistor composition 22K 16 7 Resistor deposited carbon 50 ohm lgb I Resistor deposited carbon 150 ohm Resistor deposited carbon 2K l W Resistor deposited carbon 300 ohm l W Potentiometer composition 1K Resistor composition 22M...

Page 12: ...sited carbon 200K l 31 R123 Resistor deposited carbon 70K l J 124 Sameas RlO6 R125 Resistor deposited carbon 5K l J 126 Resistor deposited carbon 250 ohm J 4W R127 Resistor deposited carbon 1 7X l J R128 Sameas Rl 09 Rl29 Resistor hi meg 1011 ohms R130 Resistor deposited carbon lK 1 J R131 Resistor deposited carbon OK l 1W X132 Sameas Xl15 x401 Resistor composition 680 ohm lO W R402 Resistor compo...

Page 13: ...or deposited carbon lK l 1W Resistor deposited carbon PK l 1W Resistor deposited carbon 1OK I 1W Sames s R406 Resistor composition 470 ohm lO same a8RJ 16 Real or composition I 00 ohm lO W Resistor wirewound 1250 ohm 5 5W same as 416 Sameas X419 Resistor composition l OOK lO 2W Relay special Rectifier selenium bridge Rectifier selenium 130 65 ma printed circuit style Rectifier selenium 13Ov 65 ma ...

Page 14: ...a 71354 includes CJ Ol Power transformer Stancor 841 6 VWUUDI tube type 5886 vacuum tube type vacuum tube type 5886 sold 8 s matched pair Vacuum tube type 12AV7 vacuum tube type 6 4 vacuum tube type 12 4 1 Vacuum tube type 12AX7 Vacuum tube type OG3 same as v7 Input connector 5 conductor Cannon RSK U4 3lSL Pilot lamp 51 two per instrument w 5886 5886 EV 12AU7 6 4 EV l B4A EV 12AX7 EV OG3 IV 7 ...

Page 15: ...el 510 when tosti esis tars capacitors and other small parts It is designed to attach directly to the Model 310 Megohm meter See Sectiou ii ComponentMeasurements Model 3102 Volume Hesistivity Adapter is a shielded enclosure exter _ _ _ I_ nally similar to Model 5101 It has a set of electrodes which facili tate making volume resistivity measurements andis fully described in Section ii Volume Resist...

Page 16: ...oss the micro microammeter as in the special case of the Model 51036 Test Leads Spurious current leakage is avoided by using excellent insulation ma terial such as teflon or polyethylene in the test leads and fixtures and by guarding all leakage paths The spurious charges or static electricity can be avoided by handling the test sample as little as possible before measuring it A 200 foot piece of ...

Page 17: ...nat the capacitor is completely charged before mov ing the switch to the Test position The effects of 60 cps pickup by the specimen ars eliminated by a 500 mmf capacitor located in the connector housing and connected across the input of the micro microammeter Because of the capacitor however the response of tho amplifier and meter are slowed or instance to read gO of f ial value in 2 5 secon3 8 on...

Page 18: ...rs giving the volume resistivity in ohm centimeters r i CND r l The Keithley Model 5102 Volume Resistivity Adapter provides the desired electrode configuration in a shielded box which can be connected directly to the Model 510 Graphite or aquadag or silver conducting paint elect rode patterns should be painted or stencilled on the surfaces as described in the ASTMSnecification The electrode dimens...

Page 19: ...ard electrodes can be connected to plug8 which are inserted into the HI and Guard jacks Fig 510 T 18 a dia gram of the Model 5101 used in this fashion Measuring Volume Resistlvity using the Model 5101 ComponentAdapter If temperature coefficients of resistance or the high temperatLn e perform ance of insulating material are of interest the specimen and holder are mounted in an oven For temperatures...

Page 20: ...igure 510 10 illustrates a variation of the guarded elec trode connection for measuring volume resistivity of these sheets or for quick compari sions of resistances between sheets Here the surface leakage path is very long and with materials which are known to have good surface properties Che surface resistance is much higher than the volume resistance The weight is chosen large enough and heavy e...

Page 21: ... water vapor from the air or by water films oil films and salts resulting from fingerprints Similes problems can arise if the graphite used in making an electrode on a sample is streaked acro88 the gap to the Guard or if the sample is put on the rings of the volume resistivity holder 80 that it is poorly centered and the HI and Guard are nearly short circuited by the central electrode MEASURING WI...

Page 22: ... is above ground by the potentialE2 and care must be exer cised In handling samples The discharge switch cannot diecharge the sample except for the contribution of El All previous commentoregarding shielding against stray 60 cppspickup apply E2 must be a very stable source if the reading is to be valid A battery is preferable in most cases especially if the teat sample is capacitative Measurement ...

Page 23: ... ...

Page 24: ...w 499 n l l 2 w DCb 91637 DCF l 2 Rl2 499 DCb 91637 DCF l 2 R12 499 DCb 91637 DCF l 2 R12 499 DCb 91637 DCF l 2 Rl2 499 DCb 91637 DCF l 2 Rl2 499 R122 DCb 91637 DCF l 2 R12 499 7 change to the following page 24 Circuit De g Value Rating R123 499 cl l l 2 w R124 499 0 l l 2 w R125 499 n l l 2 w R126 499 n l l 2 w TYPO DCb DCb DCb DCb Mfg Mfg Keithley Fig Code Part No Part No Ref 91637 DCF l 2 R12 4...

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