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Electrometer Calibration Standard

Instruction Manual

A G R E A T E R

M E A S U R E O F C O N F I D E N C E

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Summary of Contents for 5156

Page 1: ...Model 5156 Electrometer Calibration Standard Instruction Manual A G R E A T E R M E A S U R E O F C O N F I D E N C E ...

Page 2: ...E FOR ANY DIRECT INDIRECT SPECIAL INCI DENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRU MENTS INC HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES SUCH EXCLUDED DAMAGES SHALL INCLUDE BUT ARE NOT LIMITED TO COSTS OF REMOVAL AND INSTALLATION LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON OR DAMAGE TO PROPERTY Keithle...

Page 3: ...Model 5156 Electrometer Calibration Standard Instruction Manual 01995 Keithley Instruments Inc All rights reserved Cleveland Ohio U S A January 1999 Second Printing Document Number 5156 901 01 Rev B ...

Page 4: ...he user should incorporate immediately into the manual Addenda are numbered sequentially When a new Revision is cre ated all Addenda associated with the previous Revision of the manual are incorpo rated into the new Revision of the manual Each new Revision includes a revised copy of this print history page Revision A Document Number 51 YOI 01 December 1994 Addendum A Document Number 5156 901 02 No...

Page 5: ...d Installation Cat egory I and Installation Category II as described in the International Electrotechnical Com mission IEC Standard IEC 60664 Most measurement control and data I O signals are Installation Category I and must not be directly connected to mains voltage or to voltage sources with high transient over voltages Installation Category II connections require pro tection for high transient ...

Page 6: ...refer to the operating in structions located in the manual The symbol on an instrument shows that it can source or measure 1000 volts or more including the combined effect of normal and common mode voltages Use standard safety precautions to avoid personal contact with these voltages The WARNING heading in a manual explains dangers that might result in personal injury or death Always read the asso...

Page 7: ... downloading of 5 156 characterized data to 6517 Electrometer MAX INPUT VOLTAGE 2OOVpeak CONNECTORS One 3 Lug Triax for meter Six BNC s for Calibrator connection ENVIRONMENT Operating 23 C 3 C 30 60 R H non condensing TEMPERATURE STABILIZATION 4 hours in Environment PHYSICAL Case Dimensions 114mm high x 165mm wide x 184mm deep 4 5 in x 6 5 in x 7 2 in Net Weight 1 7kg 3 8 lb Shipping Weight 4 lkg ...

Page 8: ...ng for shipment Optional accessories Section 2 Operation Introduction Definition of a standard Panel familiarization Top panel Prontpanel Charge filter Test conslderatmn Recommended voltage calibrators Current standard operation Current connections Current calculations pica1 calibrator voltages Charge standard operation Charge connections Charge calculations Typical calibrator voltages 5 5 6 6 8 8...

Page 9: ...e Model 6517A Electrometer Section 3 Maintenance Introduction Connector cleaning Factory characterization User characterization Updating standards values Front panel IEEE 488 bus Viewing characterized values Replaceable parts Factory service Schematic diagram I9 19 I9 I9 20 20 20 22 23 23 23 ii ...

Page 10: ... Figure 2 5 Figure 2 6 Figure 2 7 Figure 2 8 Figure 2 9 Top panel Front panel Charge filter Charge filter schematic Current standard connections Charge standard connections Unguarded resistance connections Guarded resistance connections Digital I O connections 7 8 9 9 I1 I3 I5 I7 I8 111 ...

Page 11: ...le 2 l Recommended voltage calibrators 10 Table 2 2 pica1calibrator voltages for current standard operation 12 Table 2 3 Typical calibrator voltages for charge standard operation 14 Section 3 Maintenance Table 3 l Calibration commands 2 I ...

Page 12: ...s Features Model 5156 features include Highly stable characterized standard resistors and capacitors ensure witi cation and calibration integrity Characterization data is supplied with the unit Internal memory stores standards values to simplify calibrating the Model 6517 Electromctcr Triax and BNC connectors simplify connections to the desired standard l Supplied charge filter minimizes the effec...

Page 13: ...ate the warranty Specifications Model 5156 specifications ax located at the front of this document Unpacking and inspection Inspection for damage Upon receiving the Model 5156 carefully inspect it for any signs of obvious physical damage Report any such damage to the shipping agent immediately Handling precautions When handling the calibration standard take care not to touch the connector insulato...

Page 14: ...l Optional accessories The following optional accessories are recommended for use with the Model 5156 Model 4851 BNC Shorting Plug Shorts HI and LO terminals of Model 5156 BNC jacks when using the unit as a resistance or capacitance standard Model 6171 J Slot Male to Z Lug Female Triax Adapter Allows connection of 2 slot triax cables to the Model 5156 triax OUTPUT jack Model 7051 BNC Cables BNC to...

Page 15: ... to potentially lethal voltages Definition of a standard A standard is a component whose value has been accurately measured and whose stability variation in value over time can be accurately predicted Generally such standards are measured by equipment with uncertainty that is traceable to NIST National Institute of Standards and Technology standard values Model 5156 specifications stated at the fr...

Page 16: ...onductor while the shell of each jack is connected to chassis ground OUTPUT Jack This 3 lug triax jack is normally connected to the input of the instrument being tested The center conductor is internally connected to each of the resistance and capacitance standards the inner ring is connected to SHIELD and the outer ring is at chassis ground WARNING To assure proper safety grounding always connect...

Page 17: ... r71 Figure 2 l Top panel ...

Page 18: ...onnections TO 6517 DIGITAL I O Jack This DIN jack connects the unit to the Model 6517 Electrometer when cnlihrating that instrument Use the supplied data trans fer cable to make the connection Figure 2 3 shows the configuration of the supplied charge filter The purpose of the filter is to minimize the effects of rapid voltage calibrator rise times that would otherwise affect charge measurements To...

Page 19: ...ate of 23 3 C Do not touch triax or BNC jack insulators If the insulators become contami nated they should he carefully clenncd as covcrcd in Section 3 Keep caps on connecting jacks when not in USC Use only quality connecting cables and keep cables as short aspossible Do not flex or vibrate cables while making measurements Perform all tests at a stable ambient temperature and humidity recommended ...

Page 20: ...T PUT jack to the instrument INPUT jack before applying voltages to the standard Connect the appropriate resistance standard jack to the DC voltage calihra tar using a BNC cable and adapter Be sure that the Model 5156 SHIELD and CHASSIS jacks on the front panel are connected together CAUTION Do not apply more than 200V peak to the Model 5156 Current calculations The generated current value may he ...

Page 21: ...Example Assume that the calibrator voltage is 2OV and that the actual value of the IOGQ resistor is 9 9GQ The generated current is I 20V 9 9GQ I 2 020202nA Figure 2 5 Current standard connections II ...

Page 22: ...tion as a charge standard When making connections be sure to Connect the Model 5156 OUTPUT jack to the INPUT jack of the instru ment being tested using a suitable triax cable WARNING To assure proper grounding connect the Model 5156 OUT PUT jack to the instrument INPUT jack before applying voltages to the standard Connect the charge filter OUTPUT jack to the BNC jack of the capacitance standard be...

Page 23: ...J Model 5156 Electrometer Calibration Standard Connect Cable Shield to Output LO Figure 2 6 Charge standard connections 13 ...

Page 24: ...r voltage is ZV and that the actual value of the 100 F capacitor is lOl 3nF The generated charge is Q 2Vx 101 3nF Q 202 6nC Typical calibrator voltages Table 2 3 summakes typical calibrator voltages capacitance standards used and the resulting charge values which arc based on nominal capacitance values Table 2 3 Typical calibrator vokqesfor charge standard operation Calibrator voltage 2v 2ov 2v 2o...

Page 25: ...n making connections Connect the Model 5156 OUTPUT jack to the instrument INPUT jack using a suitable triax cable Connect the Model 4851 BNC Shorting Plug to the RNC jack associated with the desired rcsistancc standard Bc sure the SHIELD and CHASSIS jacks on the front panel arc conncctcd together Figure 2 7 Unglrarded resistance connections 15 ...

Page 26: ...tions Connect the Model 51S6 OUTPUT jack to the instrument INPUT jack using a suitable triax cable Conncct the Model 48 51 BNC Shorting Plug to the BNC jack associated with the desired resistance standard Remove the link between the SHIELD and CHASSIS jacks If instrument common is not connected to chassis ground connect the Model 5156 CHASSIS jack to the instrument common input terminal If the tes...

Page 27: ...r COMMON Figure 2 8 Guarded resistance connections 17 ...

Page 28: ...meter In order to calibrate the Model 6517A the Model 5156 must be connected to the DIGITAL I O jack of the clec trometer as shown in Figure 2 9 For detailed information on using the Model 5156 for Model 65 l7A verification and calibration refer to the Model 6517A Calibration Manual Model 5156 Electrmeter Calibrator Standard Figure 2 9 Di qiral l 0 connections I8 ...

Page 29: ...environ ment before use Factory characterization Model 5156 resistance and capacitance standards should be characterized at least once a year to ensure calibration integrity Because of the difficulty in obtaining test equipment with sufficient accuracy it is strongly recommended that the unit be returned to the factory for characterization See Factory service below for information on returning the...

Page 30: ...nter new standard values USCthe up range key to scroll through num bers or use the down range key to scroll through letters 3 Save the new values then pressthe EXIT key to return to normal display IEEE 488 bus Table 3 l summarizes Model 6517 bus commands Follow the steps below to program new standards values I Send the following command to unlock Model 5156 calibration using the password cAL uNPR ...

Page 31: ...ON if a Model 5156 is connected or 0 if Ol These commands control the Model 5156 Send IOOMO resistor value Request 1OOMn resistor value Send IGP resistor value Request lG61 resistor wluc Send IOGQ resistor value Request lOGS2resistor value Send IOOGO rcsintor value Rcqucst 1OOGQresistor value Send IOOOpF 1nF capacitor value ClOOOP ClOON Nr f ClOON DxrE Year aOnth Date DATE NINE Year ao th Date NDU...

Page 32: ...234567X9 ABCDEFGHIJ KLMNOPQRSTUVWXYZ all lower case lcttcrs are converted to upper case Unlock the save abilily The correct password must be sent to unlock the save ability Default 5lS6 Viewing characterized values To view standards values from the front panel select the CALICAL OPTNIEW CONST selection then sclcct the desired standard value to display To request values over the bus simply send the...

Page 33: ...carton or the equivalent and include the following information l Call the Repair Department at I 800 552 1 I15 for a Rctum Material Autho rization RMA number Write ATTENTION REPAIR DEPARTMENT and the RMA number on the shipping label Advise asto the warranty status of the unit Fill out and include the service form located at the back of this manual Be sure to indicate the type of service required S...

Page 34: ... a ...

Page 35: ...3 F Factory characterization Fclctoryservice 23 Features I Front panel 8 G General inf rmati n I Guarded perado 16 H Handling precautions 2 5 19 I Inspection Cmdamage 2 M Maintenance 19 Manual addenda 1 0 Operation 5 Optional accessuries 1 OUTPUT jack 6 I Panel Camiliaization 6 R Recommended vologc calibrators 9 Repacking f r fihipment Replaceable parts 23 Rcsistanccstandardoperation 15 S Safety s...

Page 36: ...U Unguarded operation 15 Unpacking and inspection 2 Updating standardsvalues Front pun 4 20 IEBM8X bus 20 User characterization 19 V Viewing characterized values 22 ...

Page 37: ...Service Form ...

Page 38: ...ithley Instruments Inc All other trademarks and trade names are the property of their respective companies Keithley Instruments Inc 28775Aurora Road Cleveland Ohio 44139 440 248 0400 Fax 440 248 6168 1 888 KEITHLEY 534 8453 www keithley com Copyright 2000 Keithley Instruments Inc No 2193 Printed in the U S A 4 2001 ...

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