KEI 2001 Quick Reference Guide 电路图.pdf

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1、 Model 2001 Multimeter Quick Reference Guide RadioFans.CN 收音机爱 好者资料库 Model 2001 Multimeter Quick Reference Guide 1992, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio 44139 U.S.A. Document Number: 2001-903-01 Rev. B RadioFans.CN 收音机爱 好者资料库 Table of Contents Safety Precautions. 1 Intr

2、oduction . 5 Operation Summary. 6 Multiple Displays.11 Menu Structures. 13 Default Conditions. 32 Error and Status Messages . 48 IEEE-488.2 Common Commands and Queries. 56 SCPI Command Subsystems . 58 RadioFans.CN 收音机爱 好者资料库 1 Safety Precautions The following safety precautions should be observed be

3、fore using this product and any associated instrumentation. Al- though some instruments and accessories would normally be used with non-hazardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualifi ed personnel who recognize shock haz

4、ards and are familiar with the safety pre- cautions required to avoid possible injury. Read the operating information carefully before using the product. The types of product users are: Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring tha

5、t the equipment is operated within its specifi cations and operating limits, and for ensuring that operators are adequately trained. Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instrument. They must be protected from

6、 electric shock and contact with hazardous live circuits. Maintenance personnel perform routine procedures on the product to keep it operating, for example, setting the line volt- age or replacing consumable materials. Maintenance proce- dures are described in the manual. The procedures explicitly s

7、tate if the operator may perform them. Otherwise, they should be performed only by service personnel. Service personnel are trained to work on live circuits, and per- form safe installations and repairs of products. Only properly trained service personnel may perform installation and service procedu

8、res. Exercise extreme caution when a shock hazard is present. Le- thal voltage may be present on cable connector jacks or test fi xtures. The American National Standards Institute (ANSI) 2 states that a shock hazard exists when voltage levels greater than 30V RMS, 42.4V peak, or 60VDC are present. A

9、 good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring. Users of this product must be protected from electric shock at all times. The responsible body must ensure that users are pre- vented access and/or insulated from every connection point. In

10、some cases, connections must be exposed to potential human contact. Product users in these circumstances must be trained to protect themselves from the risk of electric shock. If the cir- cuit is capable of operating at or above 1000 volts, no conduc- tive part of the circuit may be exposed. As desc

11、ribed in the International Electrotechnical Commis- sion (IEC) Standard IEC 664, digital multimeter measuring circuits (e.g., Keithley Models 175A, 199, 2000, 2001, 2002, and 2010) are Installation Category II. All other instruments signal terminals are Installation Category I and must not be connec

12、ted to mains. Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance limited sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to limit fault current and voltag

13、e to the card. Before operating an instrument, make sure the line cord is connected to a properly grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use. For maximum safety, do not touch the product, test cables, or any

14、other instruments while power is applied to the circuit under test. ALWAYS remove power from the entire test sys- tem and discharge any capacitors before: connecting or dis- connecting cables or jumpers, installing or removing switching cards, or making internal changes, such as install- ing or remo

15、ving jumpers. 3 Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured. The instrument a

16、nd accessories must be used in accordance with its specifi cations and operating instructions or the safety of the equipment may be impaired. Do not exceed the maximum signal levels of the instruments and accessories, as defi ned in the specifi cations and operating information, and as shown on the

17、instrument or test fi xture panels, or switching card. When fuses are used in a product, replace with same type and rating for continued protection against fi re hazard. Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections. If you

18、 are using a test fi xture, keep the lid closed while power is applied to the device under test. Safe operation requires the use of a lid interlock. If a screw is present, connect it to safety earth ground us- ing the wire recommended in the user documentation. The symbol on an instrument indicates

19、that the user should refer to the operating instructions 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 pre- cautions to avoid personal contact with these

20、 voltages. The WARNING heading in a manual explains dangers that might result in personal injury or death. Always read the asso- ciated information very carefully before performing the indi- cated procedure. ! 4 The CAUTION heading in a manual explains hazards that could damage the instrument. Such

21、damage may invalidate the warranty. Instrumentation and accessories shall not be connected to hu- mans. Before performing any maintenance, disconnect the line cord and all test cables. To maintain protection from electric shock and fi re, replace- ment components in mains circuits, including the pow

22、er trans- former, test leads, and input jacks, must be purchased from Keithley Instruments. Standard fuses, with applicable national safety approvals, may be used if the rating and type are the same. Other components that are not safety related may be purchased from other suppliers as long as they a

23、re equivalent to the original component. (Note that selected parts should be purchased only through Keithley Instruments to maintain ac- curacy and functionality of the product.) If you are unsure about the applicability of a replacement component, call a Keithley Instruments offi ce for information

24、. To clean an instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with no case or chassis (e.g., data acqui

25、sition board for installation into a computer) should never require cleaning if handled according to instructions. If the board be- comes contaminated and operation is affected, the board should be returned to the factory for proper cleaning/servic- ing. 2/99 5 Introduction This quick reference guid

26、e includes summary informa- tion on front panel and IEEE-488 operation for the Model 2001 Multimeter. For detailed information, con- sult the Model 2001 Operators Manual, the Model 2001 Calibration Manual, and the Model 2001-SCAN Scanner Card Instruction Manual. All Keithley product names are tradem

27、arks or registered trade- marks of Keithley Instruments, Inc. Other brand and product names are trademarks or registered trademarks of their respective holders. 6 Operation Summary Default Confi guration The Model 2001 can save from one to ten user setups in memory, depending on the installed memory

28、 option. You can select one of the user setups as the power-on default, or have the instrument power up to either of the two factory defaults (optimized for “BENCH” or “GPIB” operation). Reset the instrument to “BENCH” defaults from the front panel by performing the following steps: 1. Press the MEN

29、U key to display the main menu: MAIN MENU SAVESETUPGPIBCALIBRATION TESTLIMITSSTATUS-MSGGENERAL 2. If the SAVESETUP option is not blinking, press the key until it is blinking and then press ENTER to view the setup menu: SETUP MENU SAVERESTOREPOWERONRESET 3. Select the RESET option and press ENTER to

30、view the reset menu: RESET ORIGINAL DFLTS BENCHGPIB 4. Select the BENCH option and press ENTER. The following message is displayed: RESETTING INSTRUMENT ENTER to conrm; EXIT to abort 5. Press ENTER to confi rm. The display will show DC voltage readings with autorange enabled. 7 Assuming the Model 20

31、01 is set to primary address 16, the instrument can be reset and the reading displayed on the computer CRT from the IEEE-488 bus with the following code fragment: 100 OUTPUT 716;“:syst:pres” 110OUTPUT 716;“:fetc?” 120 ENTER 716;A$ 130 PRINT A$ Instrument Connections Each measurement function has an

32、appropriate connec- tion scheme. Connections for all functions can be found in Section 3 of the Model 2001 Operators Manual. The following steps summarize making DC voltage mea- surements with the Model 2001: 1. Select the front input jacks with the INPUTS button (outer position for front jacks, inn

33、er position for rear). 2. Using the set of supplied test leads, connect the Model 2001 to a DC voltage source (e.g., a battery) as shown in Figure 1. 3. Use the RANGE keys to select autoranging or a manual range. Pressing the AUTO range key tog- gles autoranging. You can select a different range wit

34、h the RANGE and RANGE keys. The fol- lowing code statement enables autoranging on the DCV function: 100 OUTPUT 716;“:volt:dc:rang:auto on” 8 Changing the Confi guration Each measurement function and operation has the default settings that are listed in Table 18. For example, the default settings for

35、 DC voltage are as follows: Measurement speed (integration time) Normal, 1 power line cycle. Digital fi lter Advanced, 10 readings, 1% noise tol- erance, moving average. Display resolution 6.5 digits. If these settings are not suffi cient for your application, they can be changed through confi gurat

36、ion menus. For example, to confi gure the DC voltage function to store high speed measurements, follow these steps: 1. Press CONFIG key and then the DCV key to view Figure 1. Typical DC voltage connections NEXT DISPLAY PREV POWER DCVACVDCIACI24FREQTEMP RELTRIGSTORERECALL INFOLOCALCHANSCANCONFIGMENUE

37、XITENTER RANGE AUTO FILTERMATH RANGE 2001 MULTIMETER SENSE 4 WIRE HI INPUT LO INPUTS CAL 500V PEAK F R FRONT/REAR 2A 250V AMPS 350V PEAK 1100V PEAK Model 2001 Caution : Maximum Input = 1100V peak DC Voltage Source Input Resistance = 10M on 1000V and 200V ranges ; 10G on 20V, 2V and 200mV ranges. = 1

38、M on DCV peak spikes measurement. 9 the DCV confi guration menu: CONFIGURE DCV SPEEDFILTERRESOLUTION 2. Select SPEED from the menu, then press ENTER. The multimeter displays the following menu: DCV MEASUREMENT SPEED NORMALFASTMEDIUMHIACCURACY SET-SPEED-EXACTLYSET-BY-RESLN 3. Using the cursor keys, s

39、elect the FAST option, then press ENTER. Since the resolution is set to AUTO, where it defaults to a value appropriate for the speed, it will be set to 4.5d automatically. 4. Press EXIT to return to the normal display. To store readings in the instruments data storage buffer, perform the following:

40、1. Press the STORE key. The following message is dis- played: STORE 00100 READINGS Use , , , , ENTER, EXIT, or INFO 2. Use the cursor and RANGE keys to change the number of readings stored, or just press ENTER to start storing readings. To recall the stored readings, perform the following: 1. Press

41、RECALL to view the readings. The following message is displayed with the cursor on the least signifi cant digit of the reading number: 10 +000.0000 mVDC Rdg#+00000 Time =+000.000000 sec 2. Use the RANGE keys to increment and decrement the reading number and scroll through the buffer. 3. The NEXT and

42、 PREV DISPLAY keys can be used while recalling readings to access additional buffer data, such as maximum and minimum readings. The following code fragment confi gures the Model 2001 for high speed DC voltage readings, stores 100 readings, and sends the readings over the bus: 100 OUTPUT 716;“:syst:p

43、res” 110OUTPUT 716;“:volt:dc:nplc 0.01” 120 OUTPUT 716;“:trac:clear” 130 OUTPUT 716;“:trac:feed calc” 140 OUTPUT 716;“:trac:egr full” 150 OUTPUT 716;“:trac:poin 100” 160 OUTPUT 716;“:trac:feed:cont next” 170 OUTPUT 716;“:trac:data?” 180 ENTER 716;A$ 190 PRINT A$ 11 Multiple Displays Each measurement

44、 function has its own set of “multiple displays” shown on the bottom line of the front panel display. To scroll through the multiple displays available for the present function, repeatedly press and release the NEXT DISPLAY key. The same action with the PRE- Vious DISPLAY key does a reverse scroll t

45、hrough the displays. To return to the default reading display, just press and hold either key. Table 1. Multiple displays by function FunctionNext display AllBar graph Zero-centered bar graph Maximum and minimum values Relative and actual values Calculated and actual values (see Note 1) Limits bar g

46、raph (see Note 1) Adjacent channel readings (see Note 2) DC voltageDC volts, AC ripple voltage and frequency Positive peak spikes and highest value Negative peak spikes and lowest value Positive and negative peak spikes AC voltageAC RMS voltage, frequency, and crest factor AC RMS, average, and peak

47、voltages DC current (none specifi c to function) AC currentAC RMS (or average) current and frequency AC RMS and average current 2-wire resistanceSource current Voltage drop across DUT 4-wire resistanceSource current Voltage drop across DUT Lead resistance FrequencyPeriod calculation Trigger level 12 TemperatureCelsius, Fahrenheit, and Kelvin units RTD resistance (or thermocouple voltage) Reference junction (thermocouples only) Data storage buffer Maximum and minimum values Average and standard deviation Notes: 1. Multiple displays for calculated values and limi