Keithley 485 User Manual Download | Manualshive

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Summary of Contents for 485

Page 1: ...MODEL 485 AUTORANGING PICOAMMETER QUICK REFERENCE GUIDE...

Page 2: ...struction Manual for complete information and essential safety infor mation With the Model 4853 IEEE 488 interface installed the Model 485 can be controlled over the IEEE 488 bus This booklet also co...

Page 3: ...ERIOD 300ms TEMPERATURE COEFFICIENT z f0 1 x applicable accuracy specificationper T MAXIMUM COMMON MODE VOLTAGE BOVrms DC to 60Hz sine wave ANALOG OUTPUT Output Voltage lV 10000 counts Except lOOmV 1O...

Page 4: ...ltin personal injuryor death SAFETY PRECAUTIONS 1 Before operation ground the instrument through a properly earth grounded power receptacle 2 Before servicing disconnect the instrumentfrom the power l...

Page 5: ...layedraadjng is present input RCL Indicates that the displayed reading is recalleddata BAT Indicates that the battery requires recharghg operates only if the battery pack option Model 1758 is instalie...

Page 6: ...e of current measurement for the Model 485 The range may be selected manuallyor automatically With manual range selection always use the range that allows the greatest amount of resolution Operation M...

Page 7: ...NPUT RESISTANCE WITH ZERO CHECK ENABLED Current Maximum Effective Ranae lmut Resistance 2nA 1 1GMl Impedance In Zero Check Overload 9MWX3IpF 1 Select range 2 Depress ZEFtO CHECK The ZERO CHECK button...

Page 8: ...e For example assume that the REL levelis Id and the Model 495 is manuallyset to the w range The maximum positive displayed reading before overranging would be 0 9999 This isbecause the A D converterw...

Page 9: ...tton and the displaywiil read 0 0 zero The measured current is now the 0 0 zero point for the log function The mathematical equation for the log function is shown as follows Input Display Log I I 1 Am...

Page 10: ...orage and begin data store A Pressand hold in the STO CLR button 6 The rates are scrolled on the display Tithe rates are described below C Releasethe STWCLR button when the desired rate is displayed D...

Page 11: ...n Operation 1 Pressthe STOKLR button to start the data store operation ISTO an nunciatoron the displayisturn on At thispointthe Model 465 starts storing readings 2 Hold in the STOKLR button to selectt...

Page 12: ...ximum holdfeature detects and holdsthe highestand lowest readingswhile in the data store mode This action isindependent of the storage rate and runs at a rate of three readingsper second This function...

Page 13: ...the Model 465 input Example place the Model 465 to the 2Ofi range and apply 19 066 NOTE Consultthe Model 465 InstructionManual for detailed methods of creating the proper calibrationlevels 5 Adjust th...

Page 14: ...leto the Model 485 RANGE LOG RELATIVE ZERO CHECK TRIGGER EOI STORE DIGITAL CALIBRATION SRQ RO Auto Range ROignored in calibrationmode Rl 2nA R2 20nA R3 200 nA R4 Z UI R5 20 A R6 266d R7 2mA W Off Dl O...

Page 15: ...t Status Word on next read DATA FORMAT GO Send Prefuc Gl Do Not Send Prefix TERMINATOR Y ASCII ASCII character Y CR LF CR LF YiLF CR LF CR Y X None EXECUTE X Execute other device dependent commands PO...

Page 16: ...MODEL 4953 PRIMARY ADDRESS SWITCH SET AT 22 10110 TALKER ONLY TO MODE 1pljijJpg 1 ADDRESSABLE MODE DATA FORMAT Reading NDCA 1 2345 E 9 CR LF 1 iiiti N Normal 0 Overflow C Zero Check Z Relative 15...

Page 17: ...STATUS 485 CDRZKT MdMeY CR LF r 7YzJLsIgdl D DEFAULT 4 8 5 C x D 0 R x Z 0 K 0 T 0 M 0 0 0 CR ILFI R sfk cts Front Panel Reflects 1 Front Panel 16...

Page 18: ...e Cycle power to the instrument 2 Pressand hold in the STOKLR button The followingtalk ratesscroll on the display r 0 every reading r 1 1 reading per second r 2 1 reading per 10 seconds r 3 1 reading...

Page 19: ...led programmingin formation can be found in the manual These programs displayone readhg at the output of the controller The program providesan ASCII string variable output of the form NDCA O DoOO OCR...

Page 20: ...tails 4 Place the instrument software disc in the default drive type LOAD DECL and press the return key 5 Enter the following program into the computer pressingthe return key after each lineis typed L...

Page 21: ...130 GOT0 120 140 V CALL IBONL fM485 V Prompt for wmmand string See if program is to be halted If null command string go back and get another Address 485 to listenand sand command string Assign readin...

Page 22: ...5 to the w range and take a readingtype in R4TlX and depressthe RETURN key 7 The disolavwill read NDCA O OOOOE 6when the Model 485 is in zero ctL cic PROGRAM 10 DIM A 2O BS 20 20 ZS CHRS 28 30 INPUYTE...

Page 23: ...END LINE k8yaft8r each lineis 4 Depress the RUN key 5 The displaywill read TEST SETUP 6 To programthe Model 465 to the 2 range and take a reading type in R4TlX and depressthe END LINE key 7 The displ...

Page 24: ...read TEST SETUP 6 To program the Model 485 to the w range and tak8 a reading type in R4TlX and depressthe CONTINUE key 7 The displavwill read NDCA O OOOOE 6when the Model 485 is in Zero Check PROGRAM...

Page 25: ...ENTER key after each line is 8 The displaywill r d NDCA Zero Check PROGRAM 10 REMOTE 722 20 INPUT I EST SETUP A 30 OUTPUT 722 AS 40 ENTER 722 B4 50 PRINT BS 60 GOT020 70 END 5 Pressthe HP 9815 RUN ke...

Page 26: ...ower left comer 6 To program the Model 485 to the 2 range and take a readingtype in R4TlX and press the EXECUTE key 7 The displaywill read NDCA 0 0000E 6 when the Model 485 is in Zero Check PROGRAM CO...

Page 27: ...ETURN key after each line 4 Type in RUN 5 The displaywill read TEST SETUP 6 To program the Model 485 to the 2 A rangeand take a reading type in R4TlX and pressthe RETURN key 7 The displaywiil read NDC...

Page 28: ...s follows LINK IPHILD IBLIB 6 Type RUN IPHILD and depress the RETURN key 7 The disolavwill read ENTER ADDRESS 8 Type in iand depress the RETURN key 9 The displaywill read TEST SETUP 10 To programthe M...

Page 29: ...18 I IBRECV NPUT BO PRlADR INPUT II 1 0 CALL PUTSTR 0 NPUT CALL IBUNT 07 GOT012 END Wntalk the 485 IRepeat 28...

Page 30: ...To program the Model 465 to the 2 range and take e reading type in R4TlX and depress the RETURN key 7 The displaywill read NDCA O OOOOE 6when the Model 485 is in Zero Check PROGRAM 10 OPEN 622 20 INP...

Page 31: ...F2 key to run the program The CRT will prompt with COMMAND 6 TVpe in the desired command For example To program the instru ment to the w range and take a reading type in R4TIX and press the return key...

Page 32: ...TestInstrumentation Group 28775 Aurora Road Cleveland Ohio 44139...

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