4 ½ Digit and 50,000 Count Bench Multimeters USER MANUAL - PDF

Model 2831E, 5491B 4 ½ Digit and 50,000 Count Bench Multimeters USER MANUAL Notice The information contained in this document is subject to change without notice. Safety Notice Supplement As described

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Model 2831E, 5491B 4 ½ Digit and 50,000 Count Bench Multimeters USER MANUAL Notice The information contained in this document is subject to change without notice. Safety Notice Supplement As described in the International Electrotechnical Commission (IEC) Standard IEC 664, digital multimeter measuring circuits (e.g., B&K Models 2831E and 5491B) and the USB terminal are Installation Category II (CATII). The AC input terminal is rated CAT I. This equipment is POLLUTION DEGREE 2, INDOOR USE product. Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation, service, and repair of this instrument. Before applying power, follow the installation instructions and become familiar with the operating instructions for this instrument. GROUND THE INSTRUMENT To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical ground. This instrument is grounded through the ground conductor of the supplied, three-conductor ac power cable. The power cable must be plugged into an approved three-conductor electrical outlet. Do not alter the ground connection. Without the protective ground connection, all accessible conductive parts (including control knobs) can render an electric shock. The power jack and mating plug of the power cable meet IEC safety standards. DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard. KEEP AWAY FROM LIVE CIRCUITS Instrument covers must not be removed by operating personnel. Component replacement and internal adjustments must be made by qualified maintenance personnel. Disconnect the power cord before removing the instrument covers and replacing components. Under certain conditions, even with the power cable removed, dangerous voltages may exist. To avoid injuries, always disconnect power and discharge circuits before touching them. DO NOT SERVICE OR ADJUST ALONE 2 Do not attempt any internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present. DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT Do not install substitute parts or perform any unauthorized modifications to this instrument. Return the instrument to B&K Precision for service and repair to ensure that safety features are maintained. WARNINGS AND CAUTIONS WARNING and CAUTION statements, such as the following examples, denote a hazard and appear throughout this manual. Follow all instructions contained in these statements. A WARNING statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in injury or death to personnel. A CAUTION statement calls attention to an operating procedure, practice, or condition, which, if not followed correctly, could result in damage to or destruction of parts or the entire product. WARNING: Do not alter the ground connection. Without the protective ground connection, all accessible conductive parts (including control knobs) can render an electric shock. The power jack and mating plug of the power cable meet IEC safety standards. WARNING: To avoid electrical shock hazard, disconnect power cord before removing covers. Refer servicing to qualified personnel. CAUTION: Before connecting the line cord to the AC mains, check the rear panel AC line voltage indicator. Applying a line voltage other than the indicated voltage can destroy the AC line fuses. For continued fire protection, replace fuses only with those of the specified voltage and current ratings. CAUTION: This product uses components which can be damaged by electro-static discharge (ESD). To avoid damage, be sure to follow proper procedures for handling, storing and transporting parts and subassemblies which contain ESD-sensitive components. 3 SAFETY SYMBOL This symbol on an instrument indicates that the user should refer to the operating instructions located in the manual. Electrical Shock hazard. Chassis ground symbol. CAT I (1000V) CAT II (300V) IEC Measurement Category II. Inputs may be connected to mains (up to 300 VAC) under Category II overvoltage conditions. IEC Measurement Category II. Inputs may be connected to mains (up to 300 VAC) under Category II overvoltage conditions. Compliance Statements Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems) This product is subject to Directive 2002/96/EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment (WEEE), and in jurisdictions adopting that Directive, is marked as being put on the market after August 13, 2005, and should not be disposed of as unsorted municipal waste. Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements. 4 Table of Contents Notice... 2 Safety Notice Supplement... 2 Safety Summary... 2 Chapter 1 General Information Feature Overview Incoming Inspection... 8 Chapter 2 Overview Front Panel Overview Annunciators on Screen Front Panel Menu Reference Front Panel Menu Overview Rear Panel Summary Power up Power Line Connection Input Terminals Power-up Sequence High Energy Circuit Safety Precautions Power-on Defaults Warm-up time Display Chapter 3 Basic Measurements Preparation Measuring Voltage Connections Measuring Current Connections Front Panel Fuse Replacement Measuring Resistance Connections Measuring Frequency and Period Trigger Level and Measurement Errors Gate Time Connections Measuring Continuity Connections Testing Diode Connections Measuring True RMS AC+DC Connections Using the 2 nd parameter display Math Functions Percent 3.9.2 db Calculation dbm Calculation Chapter 4 Measurement Options Measurement configuration Range Relative Rate Trigger Operations Trigger procedure Reading Hold MAX / MIN Limit Operations Enabling limits Setting Limit Values System Operations Beeper Control Baud rate Selecting the Terminal Character Key Sound Chapter 5 Remote Operation USB & RS Serial Interface Operation USB interface configured as virtual COM RS232 interface Sending and receiving data Selecting Baud Rate Software Protocol Data Format Chapter 6 SCPI Command Reference Command structure Command Syntax Commands and command parameters Short-form Rules Basic Rules of Command Structure Multiple Command Rules Command Path Rules Command Reference DISPlay subsystem FUNCtion subsystem VOLTage subsystem CURRent subsystem RESistance subsystem FREQuency and PERiod subsystem TRIGger subsystem FETCH Subsystem 6.3.9 SYSTem Subsystem Common Commands Chapter 7 Specifications SERVICE INFORMATION LIMITED WARRANTY Chapter 1 General Information 1.1 Feature Overview The 2831E 4½ digit and 5491B 50,000 count multimeters provide measurements with high accuracy, great stability and fast measurement rates. The meters provide a maximum measurement rate of 25 readings/sec and a 0.02% and 0.03% DC voltage basic accuracy for model 5491B and 2831E respectively. Both meters have broad ranges that can measure: DC voltage up to 1000 V AC (RMS) voltage up to 750 V DC current up to 20 A AC (RMS) current up to 20 A Two -wire resistance up to 20 MΩ (50 MΩ for model 5491B) Frequency from 10 Hz to 1 MHz Some additional capabilities: Full range of functions: In addition to those listed above, the meter functions include period, db, dbm, continuity, diode testing, max, min and percent. Programming languages and remote control interfaces: The meters are programmable via USB (Virtual COM) interface using SCPI commands 1.2 Incoming Inspection Please inspect the instrument mechanically and electrically upon receiving it. Unpack all items from the shipping carton, and check for any obvious signs of physical damage that may have occurred during transportation. Report any damage to the shipping agent immediately. Save the original packing carton for possible future reshipment. The following items are included with every order: Multimeter Test leads Power cord Spare fuse Operation Manual Calibration certificate and test report Verify that all items above are included in the shipping container. If anything is missing, please contact B&K Precision. 8 Chapter 2 Overview 2.1 Front Panel Overview The front panel of the multimeter is shown in Figure 2-1. This figure includes some important abbreviated information that should be reviewed before operating the instrument. 2. Math function key 1. Function keys Input terminals Primary Display Secondary Display On /off Switch Current Input fuse 5. Range 4. Menu 3. 2 nd Display 7. Shift/local 6. Hold/Trig Selection Operation And speed key Key Key Figure 2-1 Front Panel 1. Measurement Function keys (shifted and unshifted) Select measurement function: DC voltage and current, AC voltage and current, resistance, continuity, frequency, period, db, dbm, True RMS AC+DC and diode test. 2. Math function keys Select the math function: Rel, %, Max/Min, Comp and Hold nd Display and speed key Changes reading rate: Fast, Medium and Slow. turns on/ off the 2 nd parameter display. 4. Menu operation keys Open/Close menu Move through selections within menu level, command level or parameter level Move through selections within menu level, command level or parameter level. Move up a level. Move down a level. (ENTER) Save the change made on parameter level, and return to the command level. Cancel the change made on parameter level, and return to the command level. 9 5. Range and Combination function selecting keys Select a 2 nd display parameter Select a 2 nd display parameter Select a higher range and disable auto ranging. Select a lower range and disable auto ranging. 6. Trig/Hold Key Trig Toggle between auto ranging and manual ranging. Trigger a measurement from the front panel. Trig Hold a reading on the display. 7. Shift/Local keys Used to access shifted keys. (LOCAL) Cancel remote control mode and back to the LOCAL mode. 2.2 Annunciators on Screen Figure 2-2 Display Annunciators FAST MED SLOW TRIG HOLD REL MATH DC AC Fast reading rate Medium reading rate Slow reading rate Indicates trigger (front panel, bus) selected. Reading HOLD function is enabled Relative reading displayed A math operation is enabled (%, db, dbm). (Speaker) Beeper on for continuity testing function (Diode) Instrument is in diode testing function COMP DC operation is enabled AC operation is enabled Limit testing function is enabled 10 HI/IN/LO RMT AUTO Max/Min ERR SHIFT Indicates the limit testing results Multimeter is in remote control mode Auto ranging enabled MAX / MIN operation is enabled Hardware or remote control error detected Accessing shifted keys 2.3 Front Panel Menu Reference A:MATH MENU 1: HI LIMIT 2: LO LIMIT 3: PERC REF 4: db REF 5: dbm REF 1. HI LIMIT Set the high limit for limit testing. 2. LO LIMIT Set the low limit for limit testing. 3. PERC REF Set the reference value for PERCENT function 4. db REF Set the db reference voltage value. 5. dbm REF Set the dbm reference impedance value. B:TRIGGER MENU 1: TRIG MOD 1. TRIG MOD Select IMMediate, Manual or Bus trigger source mode. C:SYSTEM MENU 1: BEEP STA 2: BAUD RAT 3: TX TERM 4: RETURN 5: KEY SONG 6: REVISION 1. BEEP STA Enable or disable the beeper function 2. BAUD RAT Select the baud rate for USB (virtual COM) or RS232 (Model 5491B only) operation. 3. TX TERM Set the terminal character for USB (virtual COM) or RS232 (Model 5491B only) operation, which identifies the end of a command string 4. RETURN Sets whether to enable Echo of the sent SCPI commands in return string. (i.e. if ON, sending *IDN? will return with *IDN? and model information on two separate lines). 5. KEY SONG Enable or disable the key sound when you press a key. 6. REVISION Shows the model number and firmware version of the instrument. 11 2.4 Front Panel Menu Overview The menu is organized in a top-down tree structure with three levels (menus, commands and parameters) as shown in Figure 2-3. You can use down ( ) or up ( ) to move menu tree from one level to another. Each of the three levels has several horizontal choices which you can view by using left ( ) or right ( ). Menus Commands Parameters Figure 2-3 Menu Tree To turn on the menu, press (Menu). To turn off the menu, press (Menu), or press any of the function or math keys on the front panel. To confirm a change on the parameter level, press (ENTER). To cancel a change on the parameter level, press (Menu). Note: If you press on the menu level, this is the top level of the menu and you cannot go any higher; similarly if you press on the parameter level, this is the bottom level of the menu and you cannot go any lower. 12 2.5 Rear Panel Summary The rear panel of the multimeter is shown in Figure 2-4. This section includes important information that should be reviewed before operating the instrument Figure 2-4 Rear Panel 1. USB Device Port Connection port for USB remote control. 2. Grounding Chassis Grounding terminal 3. Power-Line Fuse-Holder Assembly The multimeter can be configured for line voltage of 110/220 V ± 10% AC at line frequency of 50/60 Hz ± 5%. Power-line fuse is used for instrument protection. (220 V/500 ma or 110 V/1 A) Note: Please use the same-type fuse. To verify and replace the fuse, remove the power cable and pull out the fuse holder. To select between line voltage operations of 110 V or 220 V, turn the grey colored fuse holder until the correct line voltage label is shown on the outer window of the fuse holder. It should say 110 or 220 depending which way you turn it. 4. RS232 Communication Port (Model 5491B only) Connection port for remote control via RS 2.6 Power up Power Line Connection Follow the procedure below to connect the multimeter to line power and turn on the instrument. 1. Check to make sure that the line voltage is in the correct range of 110 V or 220 V ± 10% (198 V to 242 V) and line frequency is in the range of 60 Hz or 50 Hz ± 5% (or 47.5 to 52.5 Hz) and that the line voltage switch is in the correct position before connecting the power cord. To check, first look at the label on the fuse compartment to verify if it is shown as 110 or 220. If it is not switched to the correct one, open up the fuse compartment and turn the grey fuse holder until it shows the correct voltage label (110 or 220) on the outer part of the fuse compartment. Then, check to make sure correct fuse value is used for the selected voltage operation. CAUTION: Operating the instrument on an incorrect voltage may cause damage to the instrument, possibly voiding the warranty. 2. Before plugging in the power cord, make sure that the front panel power switch is in the off position. 3. Connect the female end of the supplied power cord to the AC receptacle on the rear panel. Connect the other end of the power cord to a grounded AC outlet. WARNING: The power cord supplied with the multimeter contains a separate ground wire for use with grounded outlets. When proper 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 personal injury or death due to electric shock. 4. Turn on the instrument by pressing the front panel power switch and instrument is ready for measuring Input Terminals The input terminals are shown in Figure 2-5. The multimeter is protected against overloads up to the limits as shown in table 2-1. Exceeding these limits may result in a hazard to both the multimeter and operator. 14 2 ma-200 ma for 2831E, 5 ma-500 ma for model 5491B range DC/AC current input terminal for DC/AC current Input-High terminal for Volts, ohms, Hz, period, diode and continuity measurements Common terminal 2 A (5 A for model 5491B) and 20 A range current input terminal for DC/AC current measurement T1AL/250 V type fuse for the ma measurement range Figure 2-5 Input terminals Table 2-1 Input protection Limits Function Input Terminals Maximum Allowable Input DCV to COM 1010V DC ACV,HZ to COM 757.5V AC RMS,1000V Peak ma, HZ 500mA to COM 200mA (Model 5491B: 500 ma) DC or AC RMS 20A,HZ 20A to COM 20A DC or AC RMS Ω to COM 500V DC or AC RMS, to COM 500V DC or AC RMS All functions Any terminals to earth 1000V DC or 1000V peak AC Power-up Sequence On power-up, the multimeter performs self-tests on its EPROM and RAM and lights all segments and annunciators for about 1 second. If a failure is detected, the instrument momentarily displays an error message and the ERR annunciator turns on. If the instrument passes self-tests, the firmware revision will be displayed momentarily High Energy Circuit Safety Precautions To optimize safety when measuring voltage in high energy distribution circuits, read and use the directions in the following. When making measurements in high energy circuits, use test leads and accessories that meet the following requirements: Test leads and accessories must be fully insulated. Only use test leads that can be connected to the circuit (e.g., alligator clips, spade lugs, etc.) for 15 hands-off measurements. Do not use test leads or accessories that decrease voltage spacing. This diminishes arc protection and creates a hazardous condition. Use the following sequence when measuring high energy circuits: 1. De-energize the circuit using a regular installed connect-disconnect device, such as a circuit breaker, main switch, etc. 2. Attach the test leads to the circuit under test. Use appropriate safety rated test leads. 3. Set the multimeter to the proper measurement function and range. 4. Energize the circuit using the installed connect-disconnect device and make measurements without disconnecting the multimeter. 5. De-energize the circuit using the installed connect-disconnect device. 6. Disconnect the test leads from the circuit under test. WARNING: The maximum common-mode voltage (voltage between COM and the chassis ground) is 500V peak. Exceeding this value may cause a breakdown in insulation, creating a shock hazard Power-on Defaults 2831E and 5491B have a factory default setting for the power-on setting. Since the basic measurement procedures in this manual assume the factory defaults, reset the instrument to the factory settings when following step-by-step procedures. Table 2-2 lists the factory default settings. Table 2-2 Factory Default Settings Setting Factory Default Function DCV Range AUTO Rate Medium Remote/Local Local Trigger Mode Immediate Relative Mode OFF Compare Mode OFF HI Limit +1 Lo Limit -1 Percent Mode OFF Reference +1 Max/Min Mode OFF Reading Hold OFF Secondary Display Mode OFF Cal Mode OFF 16 2.6.6 Warm-up time The multimeter is ready for use as soon as the power-up sequence has completed. However, to achieve rated accuracy and stability, allow the instrument to warm up for half an hour. If the instrument has been subjected to extreme temperatures, allow additional time for internal temperatures to stabilize. 2.7 Display The display of the multimeter is primarily used to display readings, along with the units and type of measurement. Annunciators located on the left, right and bottom indicate various states of operation. See section 2.2 for a complete listing of annunciators. 17 Chapter 3 Basic Measurements 3.1 Preparation One of the first things you would like to do with your multimeter is to become acquainted with its front panel. We have provided some exercises in foregoing chapters about preparations for use and operations of front panel. The front panel has six rows of keys to select various functions and operations. Most keys have a shifted function printed in blue above the key. To perform a shifted function, press (the Shift annunciator will turn on). Then, press the key that has the desired label above it. For example, to select the AC ACV current function, press then press (ACI). If you accide
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