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Storing readings in buffer

The reading buffer in the Model 2000 is flexible and capable. It has three controls, which are

found in the

TRACe

susbsystem. There are commands to control:

•

The size of the buffer (in readings).

TRACe:POINts <NRf>

•

Where the data is coming from (before or after the CALCulate1 math post-processing).

TRACe:FEED SENSe1

store unprocessed readings

TRACe:FEED CALCualte1

store math processed readings

•

Select buffer control mode.

TRACe:FEED:CONTrol NEVer

immediately stop storing readings

TRACe:FEED:CONTrol NEXT

start now, stop when buffer is full

The following example program sets up the Model 2000 to take 20 readings as fast as it can

into the buffer, then reads the data back after the buffer has filled.

C-6

Example Programs

Содержание 2000

Страница 1: ...Model 2000Multimeter User s 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...

Страница 2: ...IRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS INC HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES...

Страница 4: ...Revision includes a revised copy of this print history page Revision A Document Number 2000 900 01 November 1994 Revision B Document Number 2000 900 01 February 1995 Revision C Document Number 2000 90...

Страница 5: ...n sient over voltages Installation Category II connections require protection for high transient over voltages often associated with localAC mains connections Assume all measurement control and data I...

Страница 6: ...manual explains dangers that might result in personal injury or death Always read the associated information very carefully before performing the indicated procedure The CAUTION heading in a manual ex...

Страница 7: ...2 17 Measuring voltage 2 18 Measuring current 2 22 Measuring resistance 2 24 Measuring frequency and period 2 26 Measuring temperature 2 28 Math 2 30 Measuring continuity 2 34 Testing diodes 2 35 3 M...

Страница 8: ...ATus subsystem 5 52 SYSTem subsystem 5 61 TRACe subsystem 5 68 Trigger subsystem 5 70 UNIT subsystem 5 74 A Specifications Accuracy calculations A 7 Optimizing measurement accuracy A 10 Optimizing mea...

Страница 9: ...UT test system 3 13 Trigger link connections 3 13 Operation model for triggering example 3 14 DIN to BNC trigger cable 3 16 Buffer locations 3 18 Using limit test to sort 100 10 resistors 3 21 Front p...

Страница 10: ...recision data format 32 data bits 5 29 IEEE754 double precision data format 64 data bits 5 29 Measurement event register 5 53 Questionable event register 5 54 Operation event register 5 55 Measurement...

Страница 11: ...2 common commands and queries 4 39 5 SCPI Command Reference Signal oriented measurement command summary 5 3 CALCulate command summary 5 8 DISPlay command summary 5 9 FORMat command summary 5 9 ROUTe...

Страница 12: ...cimal command codes E 11 Typical addressed command sequence E 13 Typical addressed command sequence E 13 IEEE command groups E 14 Model 2000 interface function codes E 15 F IEEE 488 and SCPI Conforman...

Страница 13: ...1 General Information...

Страница 14: ...peak DC current from 10nA to 3A AC RMS current from 1 A to 3A Two and four wire resistance from 100 to 120M Frequency from 3Hz to 500kHz Thermocouple temperature from 200 C to 1372 C Some additional c...

Страница 15: ...ual Safety symbols and terms The following symbols and terms may be found on the instrument or used in this manual The symbol on the instrument indicates that the user should refer to the operating in...

Страница 16: ...ossible future reshipment The following items are included with every Model 2000 order Model 2000 Multimeter with line cord Safety test leads Model 1751 Accessories as ordered Certificate of calibrati...

Страница 17: ...eads The test leads are terminated with a banana plug with retractable sheath on each end Model 8606 High Performance Probe Tip Kit Consists of two spade lugs two alligator clips and two spring hook t...

Страница 18: ...gger Link connectors e g Model 7001 Switch System The Model 8501 1 is 1m long the Model 8501 2 is 2m long Model 8502 Trigger Link Adapter Allows you to connect any of the six Trigger Link lines of the...

Страница 19: ...2 Basic Measurements...

Страница 20: ...rs DC and AC voltage measurement connections and low level voltage considerations Measuring current Covers DC andAC current measurement connections and current fuse replacement Measuring resistance De...

Страница 21: ...within functions and operations If scanner card in stalled manually scans channels OPEN Opens all channels on internal scanner card stops scanning CLOSE Closes selected internal channel STEP Steps thr...

Страница 22: ...ious selection AUTO Enables disables autorange 5 Annunciators asterisk Reading being stored diode Instrument is in diode testing function speaker Beeper on for continuity or limits testing more Indica...

Страница 23: ...INPUT LO to make DC current and AC cur rent measurements Also holds current input fuse 3A 250V fast blow 5 20mm SENSE 4 WIRE Used with INPUT HI and LO to make 4 wire resistance measure HI and LO ments...

Страница 24: ...D REPLACE FUSE WITH SAME TYPE AND RATING CAUTION FOR CONTINUED PROTECTION AGAINST FIRE HAZARD REPLACE FUSE WITH SAME TYPE AND RATING RS232 1 3 5 2 4 6 VMC EXT TRIG FUSE LINE 250mAT SB 100 VAC 120 VAC...

Страница 25: ...o DIN connector for sending and receiving trigger pulses among other instru ments Use a trigger link cable or adapter such as Models 8501 1 8501 2 8502 8504 4 RS 232 Connector for RS 232 operation Use...

Страница 26: ...r connections are made instrument chassis is connected to power line ground through the ground wire in the power cord Failure to use a grounded outlet may result in per sonal injury or death due to el...

Страница 27: ...lace it with the type listed in Table 2 1 CAUTION For continued protection against fire or instrument damage only replace fuse with the type and rating listed If the instrument repeatedly blows fuses...

Страница 28: ...essages are listed in Appen dix B NOTE If a problem develops while the instrument is under warranty return it to Keithley Instruments Inc for repair If the instrument passes the self tests the firmwar...

Страница 29: ...circuit e g alligator clips spade lugs etc for hands off measurements Do not use test leads that decrease voltage spacing These diminishes arc protection and create a hazardous condition Use the follo...

Страница 30: ...figuration as user settings 1 Configure the instrument as desired for USER default 2 Press SHIFT then SAVE 3 Use the and keys to select YES or NO 4 Press ENTER To restore factory or user settings 1 Pr...

Страница 31: ...ts Range Rate Frequency and Period Digits Range Relative Value Rate Function GPIB Address Language Limits Beeper High limit Low limit mX b Scale factor Offset Percent References On No effect On 4 Fast...

Страница 32: ...Mode Junction Temperature Relative Value Rate Thermocouple Units Triggers Continuous Delay Source On 10 Moving average Auto Off 0 0 Medium 1 PLC Off No effect No effect No effect Off 1 10 Internal 5...

Страница 33: ...Digits AC Digits DC Filter Count Mode Range Relative Value Rate AC Rate DC No effect 75 5 On 10 Moving average Auto Off 0 0 Medium Medium 1 PLC DETector BANDwidth 30 Table 2 2 cont Factory defaults Se...

Страница 34: ...ER the unit automatically displays the address selection 3 Use the and keys to toggle from ADDRess to the numeric entry Notice the val ues are blinking 4 Use the and keys to change the numeric entries...

Страница 35: ...ssage display The annunciators indicate various states of operation See Figure 2 1 for a complete listing of annunciators Status and error messages Status and error messages are displayed momentarily...

Страница 36: ...e 4 Connect test leads to the source as shown in Figure 2 4 CAUTION Do not apply more than 1000V peak to the input or instrument damage may occur The voltage limit is subject to the 8 107V Hz product...

Страница 37: ...between ranges Sudden shifts in reading To minimize pick up keep the voltage source and the Model 2000 away from strongAC mag netic sources The voltage induced due to magnetic flux is proportional to...

Страница 38: ...activation of heating and air conditioning systems To minimize the drift caused by thermal EMFs use copper leads to connect the circuit to the Model 2000 A banana plug generates a few microvolts A cl...

Страница 39: ...Range 1VAC Offset 100 counts 1 0mV Input 100mV RMS The offset is seen as the last digit which is not displayed Therefore the offset is negligible If the REL feature were used to zero the display the...

Страница 40: ...manual ranging use the RANGE and keys to select a measurement range consistent with the expected current 4 Connect test leads to the source as shown in Figure 2 5 CAUTION Do not apply more than 3A 25...

Страница 41: ...the socket 3 Remove the fuse and replace it with the same type 3A 250V fast blow 5 20mm The Keithley part number is FU 99 1 CAUTION Do not use a fuse with a higher current rating than specified or ins...

Страница 42: ...INPUTS button in the appropriate position 2 Select the measurement function by pressing 2 or 4 3 Pressing AUTO toggles autoranging Notice the AUTO annunciator is displayed with autoranging If you wan...

Страница 43: ...ble Optional shield Note Source current flows from the INPUT HI to INPUT LO terminals SHIFT CH1 REM TALK LSTN SRQ STAT REL FILT 4W BUFFER MATH REAR SCAN TIMER STEP CH2 CH3 CH4 CH5 CH6 CH7 CH 8 CH9 CH1...

Страница 44: ...quency crosses the zero level The Model 2000 uses a reciprocal counting technique to measure frequency and period This method generates constant measurement resolution for any input fre quency The mu...

Страница 45: ...between INPUT HI and INPUT LO or instru ment damage may occur 4 Take a reading from the display See Section 3 Measurement Options for information that explains the configuration options for frequency...

Страница 46: ...rd such as a Model 7057A 7402 or 7014 installed in a Model 7001 or 7002 Switch System Connections 2001 MULTIMETER Model 2000 SHIFT CH1 REM TALK LSTN SRQ STAT REL FILT 4W BUFFER MATH REAR SCAN TIMER ST...

Страница 47: ...or referenced at Channel 1 Typically a thermocouple card uses a single reference junction The Model 2000 can simulate a reference junction temperature or use the reference junction on a switching card...

Страница 48: ...math key 2 Configure the parameters for the math operation Press ENTER when done Press SHIFT then the related math function to end the calculation NOTES Once enabled for a function the mX b and percen...

Страница 49: ...ng will be expressed as a percent deviation from the reference value The percentage calculation is performed as follows where Input is the normal display reading Reference is the user entered constant...

Страница 50: ...verted to dBm then REL is applied to dBm If REL is applied after dBm has been selected dBm math has REL applied to it Configuration To set the reference impedance perform the following steps 1 After s...

Страница 51: ...to dB then REL is applied to dB If REL is applied after dB has been selected dB has REL applied to it Configuration To set the reference voltage perform the following steps 1 After selecting dB the p...

Страница 52: ...he test current flows from the INPUT HI as shown in Figure 2 9 Threshold resistance level You can define a threshold resistance from 1 to 1000 The factory setting is 10 Follow these steps to define th...

Страница 53: ...the test current do following 1 Press SHIFT then 2 Use the and keys to scroll through the three test current selections The diode test measures voltages on the 3V range for the 1mA test current and th...

Страница 54: ...2 36 Basic Measurements...

Страница 55: ...3 Measurement Options...

Страница 56: ...dings digits of resolution and measurement rate Trigger operations Uses a trigger model to explain trigger modes and sources Buffer operations Discusses the reading storage buffer and buffer statistic...

Страница 57: ...range per keypress The selected range is displayed for one second If the instrument displays the OVERFLOW message on a particular range select a higher range until an on range reading is displayed Use...

Страница 58: ...er uses a first in first out stack When the stack becomes full the measurement conversions are averaged yielding a reading For each subsequent conversion placed into the stack the oldest conversion is...

Страница 59: ...Reference Displayed Reading A rel value can be as large as the highest range Selecting a range that cannot accommodate the rel value does not cause an overflow condi tion but it also does not increase...

Страница 60: ...common mode and normal mode rejection In between settings are a compromise between speed and noise The RATE parameters are explained as follows FAST sets integration time to 0 1 PLC Use FAST if speed...

Страница 61: ...Fast bandwidth 300Hz to 300kHz the output of the analog RMS converter nearly pure DC at these frequencies is simply measured at 1 PLC 16 6ms Table 3 1 lists the rate settings for the various measurem...

Страница 62: ...ast channel remains displayed To restore trig gers use the SHIFT HALT keys Once the Model 2000 is taken out of idle operation proceeds through the flowchart Control source and event detection The cont...

Страница 63: ...duration of the delay The maximum is shown following 99H 99M 99 999S Press ENTER to accept the delay or EXIT for no change Changing the delay to MANual on one function changes the delays on all functi...

Страница 64: ...ion is to open the pre vious channel if closed and close the next channel Using the hold feature provides an auto settling time for the scanner relays Each open close transition will restart the hold...

Страница 65: ...the Trigger Link rear panel connector as External Trigger EXT TRIG input andVoltmeter Complete VMC output The EXT TRIG line allows the Mod el 2000 to be triggered by other instruments The VMC line al...

Страница 66: ...would want the Model 2000 to output a trigger after the settling time of each measurement External triggering example In a typical test system you may want to close a channel and then measure the DUT...

Страница 67: ...PUT Card 1 7011 MUX Card WARNING NO INTERNAL OPERATOR SERVICABLE PARTS SERVICE BY QUALIFIED PERSONNEL ONLY WARNING NO INTERNAL OPERATOR SERVICABLE PARTS SERVICE BY QUALIFIED PERSONNEL ONLY CAUTION FOR...

Страница 68: ...n operation is referenced to the operation model shown in Figure 3 8 Idle Bypass B Wait for Trigger Link Trigger Scan Channel C Output Trigger Trigger D No Scanned 10 Channels Yes 7001or 7002 Make Mea...

Страница 69: ...an ten channels operation loops back up to point B where it waits for an input trigger and Remember that the Model 2000 operation is at pointA waiting for a trigger The output Channel Ready pulse from...

Страница 70: ...he factory setting the Model 8502 Trigger Link Adapter must be used to interface with instruments having BNC trig ger connections It has two micro DIN connectors and six BNC connectors one for each tr...

Страница 71: ...math operations are performed Buffered data is overwritten each time the stor age operation is selected The data is volatile it is not saved through a power cycle The following paragraphs discuss sto...

Страница 72: ...atistics For any of the buffer statistics maximum minimum av erage statndard deviation the STAT annunciator is on 3 Use the EXIT key to return to the normal display RDG NO 10 Reading Value RDG NO 9 Re...

Страница 73: ...e xi is a stored reading n is the number of stored readings The STD DEV value is the standard deviation of the buffered readings The equation used to calculate the standard deviation is where xi is a...

Страница 74: ...ltimeter to beep or not when readings are inside or outside of the limit range Setting limit values Use the following steps to enter high and low limit values 1 Press the SHIFT LIMITS keys to view the...

Страница 75: ...status NEVER OUTSIDE INSIDE Press ENTER when done When the multimeter returns to the normal display the HI IN LO status is displayed along with the reading To disable limit testing press SHIFT ON OFF...

Страница 76: ...ernational Electrotechnical Commission IEC Stan dard IEC 664 scanner cards are Installation Category I and must not be connected to mains Scanning overview A scanner lets you switch among a number of...

Страница 77: ...nnels continuously Press OPEN to open all channels Using OPEN and CLOSE keys The OPEN and CLOSE keys control channels on the internal scanner card only The keys allow you to directly Close a specific...

Страница 78: ...er can bypass the idle state Operation will wait until the programmed control source event occurs Channel counter For scanning the scan list length maximum channel less minimum channel is used to bypa...

Страница 79: ...Timer Event Detection Delay Device Action Output Trigger More Readings Reading Count Trigger counter Yes No More Channels Yes No Scan List Length Sample counter Figure 3 13 Front panel trig gering wi...

Страница 80: ...annel in the scan list MAXimum CHANnel and press ENTER to con firm 7 The next selection is for timed scans This is the Timer control source in the trigger model It sets a user specified interval for s...

Страница 81: ...output triggers Scanning also goes through the scan list twice but sends an output trigger only at the end of each scan With a reading count 0002 less than the scan list length 10 stepping yields two...

Страница 82: ...ds ten channels scanned immediately with an output trigger at the end of the scan With the timer OFF and the delay set to MANual for five seconds stepping and scanning through the channels is timed th...

Страница 83: ...rigger RECALL 10 readings RDG CNT 0010 DELAY MAN 00H 00M 05 000S STEP 10 channel closures at 5 second intervals 10 output triggers SCAN 10 channel closures at 5 second intervals 1 output trigger RECAL...

Страница 84: ...re an external scan of the first ten channels Set the Model 2000 for external triggers by pressing EXT TRIG The display will be dashes Press STEP or SCAN on the Model 2000 The asterisk and STEP or SCA...

Страница 85: ...ASYNCHRONOUS CHAN COUNT 10 SCAN CONTROL SCAN COUNT 1 Model 2000 from factory setup SHIFT CONFIG TYPE EXT MIN CHAN 001 MAX CHAN 010 TIMER OFF RDG CNT 0010 ENTER EX TRIG STEP or SCAN STEP RECALL 10 rea...

Страница 86: ...Calibration The CAL selections are used to view the calibration date and next due date to perform cali bration and to view the number of times calibration has been performed Some of the items are pass...

Страница 87: ...4 Remote Operation...

Страница 88: ...remote interfaces GPIB bus RS 232 interface You can use only one interface at a time The factory interface selection is the GPIB bus You can select the interface only from the front panel The interfa...

Страница 89: ...IT For more information about the RS 232 interface see section RS 232 operation GPIB bus The GPIB bus is the IEEE 488 interface You must select a unique address for the Model 2000 multimeter The addre...

Страница 90: ...uage you select determines the remote operations allowed To select a programming language follow these steps 1 Access the GPIB configuration options by pressing SHIFT then GPIB You see GPIB ON with GP...

Страница 91: ...except for the self test and calibration commands The com mands are listed in Appendix D See the Models 196 199 Digital Multimeter user manuals for more information about remote programming Fluke Mod...

Страница 92: ...ogramming terminal that you are connect ing to the Model 2000 multimeter can support the baud rate you selected Both the multimeter and the other device must be configured for the same baud rate To se...

Страница 93: ...ceiving device is ready Perform the following steps to set flow control 1 Access the RS 232 configuration by pressing SHIFT and then RS232 You see RS 232 ON assuming you have already selected the RS 2...

Страница 94: ...2 shows the pinout for the connector If your computer uses a DB 25 connector for the RS 232 interface you will need a cable or adapter with a DB 25 connector on one end and a DB 9 connector on the oth...

Страница 95: ...adopted by the IEEE Institute of Electrical and Electronic Engineers in 1975 The Model 2000 multimeter conforms to these standards IEEE 488 1987 1 IEEE 488 1987 2 This standard defines a syntax for s...

Страница 96: ...d different screws which were silver colored Do not use these types of connectors on the Model 2000 mul timeter because it is designed for metric threads Figure 4 3 shows a typical connecting scheme f...

Страница 97: ...88 bus NOTE You can only have 15 devices connected to a IEEE 488 bus including the controller The maximum cable length is either 20 meters or two meters times the number of de vices whichever is less...

Страница 98: ...SHIFT then GPIB You see GPIB ON with GPIB blinking 2 Go to Address choice by pressing the key You see ADDR 16 3 Go to the numeric field by pressing the key 4 Enter a new address from 0 30 by using the...

Страница 99: ...and addresses the Model 2000 multimeter to talk The following example program fragment demonstrates how OUTPUT and ENTER commands are used Note that the commands assume address 16 which is the factory...

Страница 100: ...address the instrument to listen after setting REN true before it goes into remote Note that the instrument need not be in remote to be a talker Program fragment PRINT 1 remote 16 Place the Model 200...

Страница 101: ...INT 1 abort Talker idle state turn off TALK annunciator LLO local lockout Use the LLO command to prevent local operation of the instrument After the unit receives LLO all its front panel controls exce...

Страница 102: ...nd that prevents the process ing of any other device command A DCL does not affect instrument settings and stored data Programfragment PRINT 1 clear Clear all devices SDC selective device clear The SD...

Страница 103: ...er event occurs The command TRIGGER just sends GET Any other listeners are triggered when the command is executed SPE SPD serial polling Use the serial polling sequence to obtain the Model 2000 serial...

Страница 104: ...sing it to talk with the correct MTA My Talk Address command TALK is off when the unit is in the talker idle state Place the unit in the talker idle state by sending an UNT Untalk command addressing i...

Страница 105: ...SB Questionable Summary Bit MAV Message Available ESB Event Summary Bit RQS MSS Request for Service Master Summary Staus OSB Operation Summary Bit Error Queue Output Queue Trig Trig Note RQS bit is in...

Страница 106: ...an event register An event register is a latched read only register whose bits are set by the corresponding condition register Once a bit in an event register is set it remains set latched until the r...

Страница 107: ...he appropriate bits of the enable registers To program and query the Standard Event Status Register use the ESE and ESE Common Commands respectively All other enable registers are programmed and queri...

Страница 108: ...Bit ESB of Status Byte Register See Figure 4 10 B15 B8 B15 B8 OR Idle Idle state of the 2000 Trig Triggering Meas Measuring Logical AND OR Logical OR B15 B11 Idle B10 B9 B8 B7 B6 Trig B5 Meas B4 B3 B...

Страница 109: ...B5 B4 B3 B2 LL B1 B0 BFL ROF HL RAV Reading Available HL High Limit LL Low Limit ROF Reading Overflow B11 B11 B11 B13 B9 B14 B8 B15 OR Questionable Condition Register Questionable Event Enable Registe...

Страница 110: ...ue clears the MAV bit in the Status Byte Register Read a message from the Output Queue by addressing the Model 2000 multimeter to talk af ter the appropriate query is sent Error queue The Error Queue...

Страница 111: ...3 EAV B2 B1 B0 OR SRE SRE Status Byte Register Service Request Enable Register OSB Operation Summary Bit MSS Master Summary Status RQS Request for Service ESB Event Summary Bit MAV Message Available Q...

Страница 112: ...ce was requesting service by pulling on the SRQ line For a description of the other bits in the Status Byte Register see Common commands STB The IEEE 488 2 standard uses the following common query com...

Страница 113: ...Service Request Enable Register is cleared 0 When the masked summary bit in the Status Byte Register sets it isANDed with the corresponding cleared bit in the Service Request Enable Register The logi...

Страница 114: ...Byte Register This allows subsequent serial polls to monitor bit B6 for an SRQ occurrence generated by other event types After a se rial poll the same event can cause another SRQ even if the event reg...

Страница 115: ...ommands are included in the trigger model ABOrt RCL SYST PRES Language Change No Yes Idle and Initiate Trigger Signal Control Source Trigger Source Immediate Trigger Source External Trigger Source Tim...

Страница 116: ...by pressing the TRIG key The Model 2000 Mul timeter must be in LOCAL mode for it to respond to the TRIG key Press the LOCAL key or send LOCAL 16 over the bus to remove the instrument from the remote...

Страница 117: ...d number 2 to 100 of valid hold readings readings within the window have occurred If one of the hold readings is not within the window then the instrument acquires a new seed reading and repeats the h...

Страница 118: ...b Parameter b required SYSTem PRESet No parameter used Put at least one space between the command word and the parameter Brackets Some command words are enclosed in brackets These brackets are used t...

Страница 119: ...meter is used the instrument is programmed to the RST default value When the MINimum parameter is used the instrument is programmed to the lowest allowable value When the MAXimum param eter is used th...

Страница 120: ...ue TRIGger TIMer MAXimum Queries the largest allowable value Case sensitivity Common commands and SCPI commands are not case sensitive You can use upper or lower case and any case combination Examples...

Страница 121: ...e immediate imm Rule exception The short form version of the following command uses only the first two letters of the word TCouple tc If the fourth letter of the command word is a consonant retain it...

Страница 122: ...the command levels until the command is executed Multiple command messages You can send multiple command messages in the same program message as long as they are separated by semicolons Here is an exa...

Страница 123: ...on commands and SCPI commands in the same message Both common commands and SCPI commands can be used in the same message as long as they are separated by semicolons A common command can be executed at...

Страница 124: ...ent and are separated by semicolons Items within the same query are separated by commas The following example shows the response message for a program message that contains four single item query comm...

Страница 125: ...he Standard Event Enable Register Read the Standard Event Enable Register and clear it Returns the manufacturer model number serial number and firmware revision levels of the unit Set the Operation Co...

Страница 126: ...gram the Standard Event Enable Register This command is sent with the decimal equivalent of the binary value that determines the desired state 0 or 1 of the bits in the register This register is clear...

Страница 127: ...ent Status Register sets Since both of these events are unmasked enabled the occurrence of any one of them causes the ESB bit in the Sta tus Byte Register to set Read the Standard Event Status Registe...

Страница 128: ...n response to the OPC query command Bit B1 Not used Bit B2 Query Error QYE A set bit indicates that you attempted to read data from an empty Output Queue Bit B3 Device dependent Error DDE A set bit in...

Страница 129: ...n levels of the digital board ROM and display board ROM B7 B6 B5 B4 B3 B2 B1 B0 0 1 0 1 0 1 Bit Position Event Decimal Weighting Value Value 1 Event Bit Set 0 Event Bit Cleared Events PON Power On URQ...

Страница 130: ...in idle state the Model 2000 immediately sets the OPC bit and returns to OCIS When used with the INITiate or INITiate CONTinuous ON command the OPC bit of the Standard Event Status Register will not...

Страница 131: ...it two seconds GOSUB ReadRegister Read register to show that OPC is not set PRINT 1 output 16 abort Place 2000 back in idle GOSUB ReadRegister Read register to show that OPC is now set END ReadRegiste...

Страница 132: ...ll not be sent to the Output Queue and the MAV bit will not set until the Model 2000 goes back into the idle state The initiate operations are not considered finished until the instrument goes into th...

Страница 133: ...s installed Description The response message indicates the presence or absence of an optional scanner card For ex ample 0 No scanner card installed 200X SCAN Scanner card installed RCL Recall Return t...

Страница 134: ...e setup configuration can be saved and recalled SRE NRf Service Request Enable Program service request enable register SRE Service Request Enable Query Read service request enable register Parameters...

Страница 135: ...ervice Request Enable Register send the following command SRE 48 Where ESB bit B5 Decimal 32 MAV bit B4 Decimal 16 NRf 48 The contents of the Service Request Enable Register can be read using the SRE...

Страница 136: ...details Bit 1 Not used Bit 2 ErrorAvailable EAV A set bit indicates that an error or status message is present in the Error Queue The message can be read using one of the following SCPI com mands SYS...

Страница 137: ...esult 0 or 1 in the Output Queue When the Model 2000 is addressed to talk the coded re sult is sent from the Output Queue to the computer A returned value of zero 0 indicates that the test passed and...

Страница 138: ...of INITiate are not considered complete until the Model 2000 returns to idle By sending the WAI command after the INITiate command all subsequent commands will not execute until the Model 2000 goes ba...

Страница 139: ...5 SCPI CommandReference...

Страница 140: ...Oriented Measurement Commands Covers the signal oriented measure ment commands These commands are used to acquire readings SCPI command subsystems reference tables Includes a summary table for each S...

Страница 141: ...bsequent measurements on the specified function Basically this command places the instrument in a one shot measurement mode You then use the READ command to trig ger a measurement and acquire a readin...

Страница 142: ...mand FETCh Description This query command requests the latest post processed reading After send ing this command and addressing the Model 2000 to talk the reading is sent to the computer This command...

Страница 143: ...continuous initiation is enabled the operation re starts at the beginning of the Trigger Model If the instrument is in the idle state INITiate takes the instrument out of the idle state If continuous...

Страница 144: ...n this command is sent the following commands execute in the order that they are presented ABORt CONFigure function READ When ABORt is executed if continuous initiation is disabled the instru ment goe...

Страница 145: ...al characters do not have to be included in the program message Do not use brackets in the program message Angle brackets are used to indicate parameter type Do not use angle brackets in the program m...

Страница 146: ...at STATe b STATe IMMediate IMMediate DATA Subsystem to control CALC 2 Select math format MEAN SDEViation MAXimum MINimum or NONE Query math format Enable or disable calculation Query state of math fun...

Страница 147: ...ling power cancels all user defined messages 2 RST and SYSTem PRESet has no effect on the state of the message mode Cycling power disables OFF the message mode 3 RST and SYSTem PRESet has no effect on...

Страница 148: ...2 to 10 channels Query internal scan list Specify external scan list 2 to 800 channels Query external scan list Select scan operation INTernal EXTernal or NONE Query scan operation 1 10 1 10 NONE Tab...

Страница 149: ...th to configure bandwidth Specify bandwidth 3 to 300e3 Query bandwidth 1 3 ON 0 OFF 6 Note 10 OFF 30 CURRent DC NPLCycles n NPLCycles RANGe UPPer n UPPer AUTO b AUTO REFerence n STATe b STATe ACQuire...

Страница 150: ...configure bandwidth Specify bandwidth 3 to 300e3 Query bandwidth 1 757 5 ON 0 OFF 6 Note 10 OFF 30 VOLTage DC NPLCycles n NPLCycles RANGe UPPer n UPPer AUTO b AUTO REFerence n STATe b STATe ACQuire R...

Страница 151: ...al filter 1 100e6 ON 0 OFF 7 Note 10 OFF FRESistance NPLCycles n NPLCycles RANGe UPPer n UPPer AUTO b AUTO REFerence n STATe b STATe ACQuire REFerence DIGits n DIGits AVERage TCONtrol name TCONtrol CO...

Страница 152: ...thermocouple type Path to configure reference junction Select reference type SIMulated or REAL Query reference type Specify simulated temperature in C 0 to 50 Query simulated temperature Path to conf...

Страница 153: ...ate of reference Use input signal as reference Query reference value Specify measurement resolution 4 to 7 Query resolution 10 0 OFF 7 DIODe CURRent RANGe UPPer NRf UPPer Paths to configure diode test...

Страница 154: ...n register Return status registers to default states Path to access error queue Read the most recent error message Specify error and status messages for queue Read the enabled messages Specify message...

Страница 155: ...of front panel controls RS 232 only Place 2000 in remote RS 232 only Lockout front panel controls RS 232 only Turn the keyclick on off Query the keyclick status Query power line frequency Note ON ON...

Страница 156: ...9 or INF Query measure count Set delay 0 to 999999 999 sec Enable or disable auto delay Query state of delay Query delay Select control source IMMediate TIMer MANual BUS or EXTernal Query control sour...

Страница 157: ...Select ACV measurement units V DB or DBM Path to set DB reference voltage Specify reference in volts le 7 to 1000 Query DB reference Path to set DBM reference impedance Specify reference impedance 1 t...

Страница 158: ...command is used to specify the format for the CALC1 math calcula tions With NONE selected no CALC1 calculation is performed With MXB or PERCent selected and enabled see STATe the result of the calcu l...

Страница 159: ...MATh PERCent ACQuire Use input signal as target value Description This action command is used to acquire the present input signal reading and use it as the target value for the Percent calculation STA...

Страница 160: ...C2 math calculation The calculation operations for CALC2 use data stored in the buffer With NONE selected no CALC2 calculation is performed With any of the other formats selected and CALC2 enabled see...

Страница 161: ...ion and read the result is to use the query form of the command IMMediate When this command is sent the cal culation is performed and the result is queried Program This example assumes that there are...

Страница 162: ...K for the temperature function TEMP A limit value is not range sensitive A limit of 1 for DCV is 1V on all measurement ranges STATE b CALCulate3 LIMit 1 STATE b Control LIMIT1 test Parameters b 0 or...

Страница 163: ...on will remain until it is cleared by the CLEar IMMediate command IMMediate CALCulate3 IMMediate Perform CALC3 Description When you change the configuration of the limit test the next reading is eval...

Страница 164: ...frozen All front panel controls except LOCAL are disabled Normal display op eration can be resumed by using the ENABle command to enable the display or by putting the Model 2000 into local mode press...

Страница 165: ...enables and disables the text message mode When enabled a defined message is displayed When disabled the message is removed from the display A user defined text message remains displayed only as long...

Страница 166: ...over the bus con tains the elements specified by the ELEMents command The specified el ements are sent in a particular order The ASCII data format is in a direct readable form for the operator Most B...

Страница 167: ...is 64 bits long Byte 1 7 0 Header 0 Byte 2 7 0 Byte 3 7 0 Byte 4 7 0 s e f s sign bit 0 positive 1 negative e exponent bits 8 f fraction bits 23 Normal byte order shown For swapped byte order bytes s...

Страница 168: ...is sent as fol lows Byte 1 Byte 2 Byte 3 Byte 4 Single precision Byte 1 Byte 2 Byte 8 Double precision For reverse byte order the data format for each element is sent as follows Byte 4 Byte 3 Byte 2 B...

Страница 169: ...ading to the channel number of a switching card If not scanning the channel number is 0 UNITs This element attaches the function unit to the reading and the chan nel unit internal or external to the c...

Страница 170: ...rmined by the present measurement function With a 2 wire function selected i e DCV 2 pole switching will be performed at the scanner card The specified channel 1 through 10 will close With a 4 wire fu...

Страница 171: ...e the LSELect name command in Scan commands to disable scan operations OPEN ALL ROUTe OPEN ALL Open all input channels Description This command is used to open all input channels 1 through 10 on the i...

Страница 172: ...closed channels Description This query command is used to determine which channels on the internal scanner card are closed After sending this command and addressing the in strument to talk a list of a...

Страница 173: ...ls is not allowed For exam ple 1 4 is valid 1 2 4 is not valid See the instruction manual of the internal scanner card for details on scan ning EXTernal list ROUTe SCAN EXTernal list Define external s...

Страница 174: ...to select and perform the desired scan operation When INTernal is selected the Model 2000 scans the channels of the internal switching card according to how the scan is configured see SCAN INTer nal E...

Страница 175: ...oltage RESistance Select 2 wire Resistance FRESistance Select 4 wire Resistance PERiod Select Period FREQuency Select Frequency TEMPerature Select Temperature DIODe Select Diode Testing CONTinuity Sel...

Страница 176: ...g returned by this command is the raw reading minus 1 0 Calculated MATH readings cannot be read with this command see the CALCulate subsystem for information on how to read math calcula tions The read...

Страница 177: ...reading for the Hold process COUNt NRf SENSe 1 HOLD COUNt NRf Specify Hold count Parameter NRf 2 to 100 Specify Hold count Query COUNt Query Hold count Description This command is used to specify the...

Страница 178: ...ntegration period measurement speed for the basic measuement func tions except Frequency and Period is set using the NPLCycle command NPLC Number of Power Line Cycles expresses the integration period...

Страница 179: ...ading is ohms 2 and 4 DEFault 3 ACI and DCI 757 5 ACV 1000 DCV 100e6 and MINimum 0 All functions MAXimum Same as DEFault Query RANGe UPPer Query ACI measurement range RANGe UPPer DEFault Query RST def...

Страница 180: ...ange Query AUTO Query auto range on or off Description These commands are used to control auto ranging With auto ranging en abled the instrument automatically goes to the most sensitive range to per f...

Страница 181: ...nimum value for specified function MAXimum Maximum value for specified function Query REFerence Query programmed reference value REFerence DEFault Query RST default reference value REFerence MINimum Q...

Страница 182: ...SENSe 1 CURRent DC REFerence ACQuire Acquire reference for DCI SENSe 1 VOLTage AC REFerence ACQuire Acquire reference for ACV SENSe 1 VOLTage DC REFerence ACQuire Acquire reference for DCV SENSe 1 RES...

Страница 183: ...digits DEFault 6 digits for DCI DCV 2 4 FREQ PER 5 digits for ACI ACV TEMP MINimum 3 for DCI ACI ACV DCV 2 4 TEMP MAXIMUM 6 digits for DCI ACI ACV DCV 2 4 TEMP Query DIGits Query selected resolution D...

Страница 184: ...ilter is configured TCONtrol name SENSe 1 CURRent AC AVERage TCONtrol name Select filter type for ACI SENSe 1 CURRent DC AVERage TCONtrol name Select filter type for DCI SENSe 1 VOLTage AC AVERage TCO...

Страница 185: ...AVERage COUNt n Specify filter count for TEMP Parameters n 1 to 100 Specify filter count DEFault 10 MINimum 1 MAXimum 100 Query COUNt Query filter count COUNt DEFault Query the RST default filter cou...

Страница 186: ...the bandwidth simply specify approximately the frequency of the input signal The Model 2000 will automatically select the optimum bandwidth setting NOTE For bandwidth setting of 3 and 30 the normal A...

Страница 187: ...name SENSe 1 TEMPerature TCouple RJUNction 1 RSELect name Specify reference junction type Parameters name SIMulated Use simulated temperature as reference REAL Use a measured temperature as reference...

Страница 188: ...le is currently selected C F or K Typically 0 or 23 C is used as the simulated reference tem perature REAL TCOefficient n SENSe 1 TEMPerature TCouple RJUNction 1 REAL TCoefficient n Parameters n 0 099...

Страница 189: ...r diode test Parameters NRf 0 to 1e 3 Specify diode test current Query UPPer Query selected range Description There are three current ranges available for the diode test 10 A range 100 A range and the...

Страница 190: ...s are used to read the event registers After sending one of these commands and addressing the Model 2000 to talk a decimal val ue is sent to the computer The binary equivalent of this value determines...

Страница 191: ...r Available BAV Set bit indicates that there are at least two readings in the trace buffer Bit B8 Buffer Half Full BHF Set bit indicates that the trace buffer is half full Bit B9 Buffer Full BFL Set b...

Страница 192: ...ror will clear after successful calibration of the instrument Bits B9 through B13 Not used Bit B14 Command Warning Warn Set bit indicates that a Signal Ori ented Measurement Command parameter has been...

Страница 193: ...block of the Trigger Model Bits B6 through B9 Not used Bit B10 Idle Set bit indicates that the instruments in the idle state Bits B11 through B15 Not used Trig B14 B12 B15 B11 B10 B9 B8 B7 B6 B5 B4 B1...

Страница 194: ...riate register Each event enable register is used as a mask for events see EVENt for de scriptions of events When a bit in an event enable register is cleared 0 the corresponding bit in the event regi...

Страница 195: ...Weighting Value Value 1 Enable Questionable Event 0 Disable Mask Questionable Event Events Warn Command Warning Cal Calibration Summary Temp Temperature Summary Cal B13 B9 B8 B15 B14 2 8 256 2 14 1638...

Страница 196: ...EVENt for register bit descriptions After sending one of these commands and addressing the Model 2000 to talk a decimal value is sent to the computer The binary equivalent of this decimal value indica...

Страница 197: ...on in the register On power up the Error Queue is empty When the Error Queue is empty the message 0 No error is placed in the Error Queue The messages in the queue are preceded by a number Negative nu...

Страница 198: ...Appendix B The following exam ples show various forms for expressing a message numlist Numlist 110 Single message 110 140 222 Messages separated by commas 110 222 Range of messages 110 through 222 11...

Страница 199: ...t command PRESet SYSTem PRESet Return to SYSTem PRESet defaults Description This command returns the instrument to states optimized for front panel op eration SYSTem PRESet defaults are listed in the...

Страница 200: ...ers up to the RST default conditions With PRES select ed the instrument powers up to the SYStem PRESet default conditions De fault conditions are listed in the SCPI tables Tables 5 2 through 5 11 With...

Страница 201: ...n first out FIFO register that can hold up to 10 messages Every time you read the queue the oldest message is read and that message is then re moved from the queue If the queue becomes full the messag...

Страница 202: ...aced in the idle state by first disabling continuous initiation INITiate CONTinuous OFF and then sending the ABORt command After sending the STATe command readings can be re started by sending INITiat...

Страница 203: ...ey 31 RATE key 16 TEMP key 32 EXIT key Query KEY Query last pressed key Description This command is used to simulate front panel key presses For example to select DCV you can send the following comman...

Страница 204: ...FFER MATH REAR SCAN TIMER STEP CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 CH10 HOLD TRIG FAST MED SLOW AUTO ERR EXIT ENTER DIGITS RATE REL FILTER TRIG EX TRIG STORE RECALL OPEN CLOSE DCV DCI MX B dBm ACV ACI 2 4...

Страница 205: ...is action command is used to place the Model 2000 in the remote state In remote the front panel keys will be locked out if local lockout is asserted see RWLock Note that this command can only be sent...

Страница 206: ...he buffer a subsequent store will overwrite the old readings If the sub sequent store is aborted before the buffer becomes full you could end up with some old readings still in the buffer FREE command...

Страница 207: ...us CONTrol name TRACe FEED CONTrol name Specify buffer control Parameters name NEVer Disables buffer storage NEXT Fills buffer and stops Query CONTrol Query buffer control Description This command is...

Страница 208: ...ON Enable continuous initiation Query CONTinuous Query continuous initiation Description When continuous initiation is selected ON the instrument is taken out of the idle state At the conclusion of al...

Страница 209: ...ault count COUNt MINimum Queries lowest allowable count COUNt MAXimum Queries largest allowable count Description This command is used to specify how many times operation loops around in the trigger o...

Страница 210: ...easure event control source Parameters name IMMediate Pass operation through immediately EXTernal Select External Triggering as event TIMer Select timer as event MANual Select manual event BUS Select...

Страница 211: ...action command is used to bypass the specified control source when you do not wish to wait for the programmed event Keep in mind that the instru ment must be waiting for the appropriate event when the...

Страница 212: ...ecify the units for temperature measurements VOLTage commands AC name UNIT VOLTage AC name Specify ACV units Parameters name V AC voltage measurement units DB dB AC voltage measurement units DBM dBm A...

Страница 213: ...ce level When dBm units is selectedACV dBm measurements are made using the specified dBm reference impedance The reference impedance is specified in ohms and is not range dependent For example a dBm r...

Страница 214: ...t For ex ample a dB reference level of 1 is 1V on all DCV measurement ranges DBM IMPedance n UNIT VOLTage DC DBM IMPedance n Specify dB reference Parameters n 1 to 9999 Specify reference impedance Que...

Страница 215: ...A Specifications...

Страница 216: ...6 30 6 45 6 5 1 1000 000 V9 1 mV 10 1 20 6 35 6 45 6 5 1 Resistance15 100 0000 100 1 mA 30 30 80 40 100 40 8 6 1 000000 k 1 m 1 mA 20 6 80 10 100 10 8 1 10 00000 k 10 m 100 A 20 6 80 10 100 10 8 1 100...

Страница 217: ...d and Noise Rejection Rate Readings s Digits RMS Noise 10V Range NMRR12 CMRR13 10 PCL 5 6 1 5 V 60 dB 140 dB 1 PCL 50 6 4 V 60 dB 140 dB 0 1 PCL 500 5 22 V 80 dB 0 01 PCL 2000 4 150 V 80 dB DC Notes 1...

Страница 218: ...ges and ACI all ranges 6 4 35 FAST 300 Hz 300kHz Additional Low Frequency Errors of reading SLOW MED FAST 20Hz 30Hz 0 0 3 30Hz 50Hz 0 0 50Hz 100Hz 0 0 1 0 100Hz 200Hz 0 0 0 18 200Hz 300Hz 0 0 0 10 300...

Страница 219: ...0 5 C 0 68 C Temperature Notes 1 For temperatures 100 C add 0 1 C and 900 C add 0 3 C 2 Temperature can be displayed in C K or F 3 Accuracy based on ITS 90 4 Exclusive of thermocouple error 5 Specifi...

Страница 220: ...ACE GPIB IEEE 488 1 IEEE 488 2 and RS 232C GENERAL POWER SUPPLY 100V 120V 220V 240V 10 LINE FREQUENCY 45Hz to 66Hz and 360Hz to 440Hz automatically sensed at power up POWER CONSUMPTION 22 VA OPERATING...

Страница 221: ...ent and resistance calculations are performed in exactly the same manner using the pertinent specifications ranges and input signal values Calculating AC characteristics accuracy AC characteristics ac...

Страница 222: ...can be shown that 0 998815V has an uncertainty of 36 96445 V or 0 998778V to 0 998852V using one year specifications of the 1VDC range Expressing 0 998778V as dBm and expressing 0 998852V as dBm Thus...

Страница 223: ...10mV 36 V or 10 036mV to 9 964mV Applying the voltage reading accuracy into the dB equation yields Thus the actual reading accuracy is 60dB 0 031213dB to 60dB 0 031326dB dBm and dB for other voltage i...

Страница 224: ...tance Select 6 digits 10 PLC filter ON up to 100 readings fixed range Use REL on DC voltage and 2 wire resistance measurements Use 4 wire resistance measurements for best accuracy AC voltage and AC cu...

Страница 225: ...ent and resistance Select 3 digits 0 01 PLC filter OFF fixed range AC voltage and AC current Select 3 digits 0 01 PLC filter OFF fixed range Temperature Select 3 digits 0 01 PLC filter OFF For all fun...

Страница 226: ...A 12 Specifications...

Страница 227: ...B Statusand ErrorMessages...

Страница 228: ...annot create program Expression error Hardware missing Data corrupt or stale Out of memory Illegal parameter value Too much data Parameter data out of range Settings conflict Parameter error Arm deadl...

Страница 229: ...or Invalid separator Syntax error Invalid character Command error EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE 000 No error SE 101 121 122 123 124 125 126 161 171 174 301 302 303...

Страница 230: ...4 w zero error 100k 4 w zero error 10M 4 w sense lo zero error 1k 4 w full scale error 10k 4 w full scale error 100k 4 w full scale error 1M 4 w full scale error 10M 4 w full scale error 10m adc zero...

Страница 231: ...lost GPIB address lost Power on state lost AC calibration data lost DC calibration data lost Calibration dates lost GPIB communication language lost Questionable Calibration Questionable Temperature R...

Страница 232: ...te Error DDC Mode IDDC Error DDC Mode IDDCO Error EE EE EE EE EE EE 962 963 964 965 966 Keithley 199 Serial Poll Byte Events DDC Ready DDC Reading Done DDC Buffer Half Full DDC Buffer Full DDC Reading...

Страница 233: ...C Example Programs...

Страница 234: ...r instruments a single number was used to denote each range The parameter of the SCPI RANGe command is given as the maximum value to measure The instrument interprets this parameter and goes to the ap...

Страница 235: ...CALL SEND 16 rst status Set range for each function to measure CALL SEND 16 volt dc rang 1 status CALL SEND 16 volt ac rang 20 status CALL SEND 16 res rang 80 status Switch to DC volts and take readi...

Страница 236: ...automatically arm the Model 2000 for triggers The following program sets up the Model 2000 to take one reading each time it receives an external trigger pulse Example program to demonstrate one shot...

Страница 237: ...for the Model 2000 to indicate that the buffer is full This is not a complete program Not shown are the commands to configure the trigger model and the reading buffer see the next example The example...

Страница 238: ...or after the CALCulate1 math post processing TRACe FEED SENSe1 store unprocessed readings TRACe FEED CALCualte1 store math processed readings Select buffer control mode TRACe FEED CONTrol NEVer immed...

Страница 239: ...20 status TRACe subsystem is not affected by RST CALL SEND 16 trac poin 20 status CALL SEND 16 trac feed sens1 feed cont next status Start everything CALL SEND 16 init status Initialize reading while...

Страница 240: ...eak before make operation You can use the scanner card two ways One is to issue a command to close a particular chan nel before sending other commands to take readings The other way is to program the...

Страница 241: ...odel in IDLE state set function to DCV CALL SEND 16 rst status Close channel 1 take DC voltage reading CALL SEND 16 rout clos 1 read status reading SPACE 80 CALL ENTER reading length 16 status PRINT r...

Страница 242: ...n reads the readings from the buffer Example program to demonstrate using the scan list For QuickBASIC 4 5 and CEC PC488 interface card Edit the following line to where the QuickBASIC libraries are on...

Страница 243: ...SEND 16 init status Initialize reading while the 2000 is busy taking readings reading SPACE 2500 WaitSRQ IF NOT srq THEN GOTO WaitSRQ CALL SPOLL 16 poll status IF poll AND 64 0 THEN GOTO WaitSRQ CALL...

Страница 244: ...16 trac cle status CALL SEND 16 sample coun 10 status CALL SEND 16 form elem read unit status CALL SEND 16 read status reading SPACE 300 CALL ENTER reading length 16 status PRINT reading Controlling t...

Страница 245: ...1 SENS VOLT DC DIG 4 4 digit PRINT 1 FORM ELEM READ Reading only PRINT 1 TRIG COUN 1 Trig count 1 PRINT 1 SAMP COUN 100 Sample count 100 PRINT 1 TRIG DEL 0 No trigger delay PRINT 1 TRIG SOUR IMM Immed...

Страница 246: ...C 14 Example Programs...

Страница 247: ...D Models196 199and 8840A 8842ACommands...

Страница 248: ...ge is intended to be used only over the IEEE 488 bus Using front panel controls in conjunction with this language may cause erratic operation In this case results cannot be guaranteed Table D 1 Models...

Страница 249: ...eference junction temperature Default conditions L0 L1 Restore factory default conditions and save L1 Save present machine states as default conditions Data format G0 G1 G2 G3 G4 G5 G6 G7 Reading with...

Страница 250: ...a D Display up to 12 character message a character Cancel display mode Scanning N0 N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 N12 N13 N14 N15 N16 N17 N18 N19 N20 Open all stop scanning or stepping if applicab...

Страница 251: ...ode max channel is 9 Scan mode max channel is 10 Thermocouple J0 J1 J2 Type J thermocouple Type K thermocouple Type T thermocouple O0 O1 Simulated reference junction for temperature function Real refe...

Страница 252: ...ls CAUTION The 8840A 8842A language is intended to be used only over the IEEE 488 bus Using front panel controls in conjunction with this language may cause erratic operation In this case results cann...

Страница 253: ...LF only Enable EOI only Disable all output terminators Clear X0 Device clear resets 8842A to default conditions Clear error register Single trigger Trigger measurement GET G0 G1 G2 G3 G4 G5 G6 G7 G8 G...

Страница 254: ...rmocouple Type T thermocouple Temperature unit J0 J1 J2 C default K F Thermocouple refer ence junction M0 M1 Select simulated junction default Select real junction channel 1 for 2001 TCSCAN card Scann...

Страница 255: ...E IEEE 488 BusOverview...

Страница 256: ...listener a de vice will receive information To simplify the task of keeping track of the devices a unique ad dress number is assigned to each one On the bus only one device can talk at a time and is a...

Страница 257: ...listener indicates that it is ready to listen 2 The talker places the byte of data on the bus and indicates that the data is available to the listener 3 The listener aware that the data is available...

Страница 258: ...ces including the controller Thus any number of talk ers and listeners up to that limit may be present on the bus at one time Although several devices may be commanded to listen simultaneously the bus...

Страница 259: ...VICE 4 ONLY ABLE TO TALK DAV NRFD NDAC IFC ATN SRQ REN EOI D IO1 8 DATA 8 LINES HANDSHAKE BUS MANAGEMENT DATA BUS DATA BYTE TRANSFER CONTROL GENERAL INTERFACE MANAGEMENT DEVICE 2 ABLE TO TALK AND LIST...

Страница 260: ...a and multiline commands and are bidirectional The data lines operate with low true logic Bus management lines The five bus management lines help to ensure proper interface control and management Thes...

Страница 261: ...the data lines the source checks to see that NRFD is high indicating that all active devices are ready At the same time NDAC should be low from the previous byte transfer If these conditions are not m...

Страница 262: ...e E 1 IEEE 488 bus command summary Command type Command State of ATN line Comments Uniline Multiline Universal Addressed Unaddressed Common SCPI REN Remote Enable EOI IFC Interface Clear ATN Attention...

Страница 263: ...itting addresses or multiline com mands SRQ Service Request SRQ is asserted by a device when it requires service from a con troller Universal multiline commands Universal commands are those multiline...

Страница 264: ...ET is an addressed command many devices respond to GET without addressing Address commands Addressed commands include two primary command groups and a secondary address group ATN is true when these co...

Страница 265: ...by the Standard Commands for Programmable Instruments SCPI Consortium s SCPI standard Generally these commands are sent as one or more ASCII characters that tell the device to perform a particular ope...

Страница 266: ...NAK SYN ETB CAN EM SUB ESC FS GS RS US LLO DCL PPU SPE SPD SP 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4 5 6 7 8 9 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 UNL A B C D E F G H I J K L M N O 0...

Страница 267: ...the listen command and the SDC command byte itself Table E 4 gives a typical common command sequence In this instance ATN is true while the instrument is being addressed but it is set high while sendi...

Страница 268: ...ATTENTION DCL DEVICE CLEAR IFC INTERFACE CLEAR REN REMOTE ENABLE SPD SERIAL POLL DISABLE SPE SERIAL POLL ENABLE ADDRESS COMMAND GROUP LISTEN TALK LAG LISTEN ADDRESS GROUP MLA MY LISTEN ADDRESS UNL UN...

Страница 269: ...been addressed to talk L Listener Function The ability for the instrument to receive device dependent data over the bus from other devices is provided by the L function Listener capabilities L4 of the...

Страница 270: ...nes the ability of the Model 2002 to have readings triggered C Controller Function The instrument does not have controller capabilities C0 TE Extended Talker Function The instrument does not have exte...

Страница 271: ...F IEEE 488andSCPI ConformanceInformation...

Страница 272: ...change Options Input buffer size Queries that return more than one response message unit Queries that generate a response when parsed Queries that generate a response when read Coupled commands Functi...

Страница 273: ...n complete messages Not applicable See Common Commands in Sec tion 4 Not applicable Not applicable See Common Commands in Sec tion 4 See Common Commands in Sec tion 4 See Status structure in Section 4...

Страница 274: ...ONT NEV NEV Sense Subsystem Commands RANG UPP REF ACQ RANG AUTO REF OFF presently displayed reading ROUT CLOS ROUT OPEN ALL ROUT SCAN INT ROUT SCAN LSEL ROUT SCAN LSEL ROUT SCAN LSEL NONE NONE INT Val...

Страница 275: ...cation Query 4 47 POINts command 5 68 POSetup name command 5 62 PRESet command 5 61 PRESET command 5 58 QUEue commands 5 59 RANGe commands 5 41 RCL Recall 4 47 READ command 5 5 REFerence n commands 5...

Страница 276: ...t detection 3 8 Event registers 4 20 Example programs C 1 External scan card use 3 22 External scanning 3 30 External triggering 3 11 External triggering example 3 12 External triggering with BC conne...

Страница 277: ...ASIC 4 5 programming 4 12 R Rack mount kits 1 6 Range 2 35 3 3 Rate 3 6 READ command 5 5 Reading hold autosettle 3 10 Rear panel summary 2 6 Recalling readings 3 18 Relative 3 5 Remote operation 4 1 R...

Страница 278: ...g diodes 2 35 Thermal EMFs 2 20 Thermocouple commands 5 49 Threshold resistance level 2 34 Timing 3 28 Trigger level 2 26 Trigger model 3 8 Trigger model operation 4 30 Trigger model GPIB operation 4...

Страница 279: ...Unstable Overload Will not read applied input Calibration only Certificate of calibration required Data required attach any additional sheets as necessary Show a block diagram of your measurement inc...

Страница 280: ...1 64 53 20 20 Fax 01 60 11 77 26 GERMANY Landsberger Strasse 65 82110 Germering 089 84 93 07 40 Fax 089 84 93 07 34 GREAT BRITAIN Unit 2 Commerce Park Brunel Road Theale Berkshire RG7 4AB 0118 929 750...

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