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1. Command Equivalent Keystroke on the front panel K1 Press Vdc key K2 Press Adc key K3 Press Vac key K4 Press Aac key K5 Press Q key K6 Press Diode key K7 Press Hz key K8 Press AUTO key K9 Press key K10 Press key K11 Press MinMax key K12 Press Hold key K14 Press REL key K15 Press Shift key K16 Press 2nd key K17 Press Vdc and Vac keys simultaneously K18 Press Adc and Aac keys simultaneously K19 Press Shift then keys on the front panel Increasing the intensity of VFD display K20 Press Shift then keys on the front panel Decreasing the intensity of VFD display 53 6 5 2 Set Commands e 51 command The S1 command is used to set up the measurement functions ranges and reading rates for the primary display in the meter The S1 command is followed by three parameters lt f gt lt r gt and x in order All characters for the lt gt lt r gt and x parameters must be in the upper case For detail information of using the S1 command see Table 6 4 and Table 6 6 Table 6 4 Descriptions for S1 Command Syntax Description S1 f r x In S1 command lt f gt lt r gt and x parameters are used to set up the primary display measurements f for specifying Measurement functions r for specifyin
2. JO 6 a J a secondary display Off 2nd Note 1 Press om then may turn off secondary display Note 2 Press to select the suitable range if the DCV AC ripple is over the scale of current range Note 3 Regarding secondary display function setting please refer to Section 3 10 40 e Measuring AC and DC current on rectification circuit To display AC current in primary display and DC current in secondary display or vise versus while testing a rectifier circuit user may check the DC current component and its AC ripples by taking a single measurement 1 Connect the meter to the unit under test as shown below qe m M ER _ _ SN euism DUAL DISPLAY MULTIMETER n fr E ngang A Lx m gcro 028383 emm gt Ll mA 2ND AUTO DC Cd a J C fl B EE m d coed P uu Comp a Lo ud on 1 5 Re J Iu Jl vy i _ DC AC CURRENT SOURCE V N WARNING 1 Select a correct input terminal according to the input range to be used 2 To avoid damaging the meter do not apply more than 12A to 12 input terminal 5A to select AC current measurement function for primary display 3 4 primary display A or toselect auto ranging or manual range for LY ma 4 V 2 to turn on 2ND annun
3. A dual Vacuum Fluorescent Display that allows two properties of input signal to be displayed at the same time e g DC voltage on one display and AC voltage on the other e Remote operation via RS 232 interface standard or IEEE 488 interface optional e 120 000 40 000 and 4 000 counts for different measuring rate Slow Rate 120 000 counts 2 readings sec Medium Rate 40 000 counts 5 readings sec Fast Rate 4 000 counts 20 readings sec e sensitivity in Vdc measurement e True RMS Vac with 20Hz to 100kHz bandwidth for 5492 and 40Hz to 30kHz for 5491 Vac Vdc RMS and Aac Adc RMS calculated Selectable 2 wire and 4 wire resistance measurements e Resistance measurements up to 120MQ with 1mQ resolution at slow reading rate or up to 300MQ with 10mQ and 100mQ resolution at medium and fast reading rate respectively e Wide dc and ac current measurement ranges 12mA 12 e Frequency measurements greater than IMHz with 0 01Hz best resolution e dBm measurement with variable reference impedance from 2Q to 80000 and audio power measurement capability e Zeroing mode REL to offset residual reading before taking a measurement e Compare mode to determine if a measurement 15 within above or below a designated range Hi Lo Pass e Dynamic recording mode to keep minimum and or maximum readings of measurements e CAL mode to provide electronic closed case calibration no
4. lt nnnnnns is a six digit number from 000000 to 199999 SR command is used to set the relative base for relative function Example SR 001000 Rate Range Relative base modifier to be Slow 120 000 V 1 000V Medium 400 00V 10 00V Fast 1 400 0V 10 0 V Notes The least setting digit is blank on the display of meter but it still uses to relative base To set least setting digit to 0 for fast mode as necessary Table 6 10 Descriptions for SO Command Syntax Description SO nn calculation SO nn command is used to select the reference impedance for dBm nn is a two digit decimal numeric number from 00 to 20 representing 21 different types of reference impedance Example Command string S015 to set reference impedance at 6000 nn Impedance nn Impedance nn Impedance 00 20 07 1100 14 5000 01 4Q 08 1240 15 6000 02 80 09 1250 16 8000 03 160 10 1350 17 9000 04 500 11 1500 18 10000 05 75Q 12 2500 19 12000 06 930 13 3000 20 80000 58 6 5 3 Query Commands e RO command R0 command is used for requesting the meter to return its current status The meter will then respond the following 10 digit character string to the host after receiving the RO command lt h h gt lt 8g 18 gt v x fj lt r 1 gt f 1 gt ry For detail information of using RO command please refer to Table 6 11 and T
5. MSS are set 1 and the rest of bits are reset 0 WAI Description Command required by IEEE 488 2 standard Non operational in the meter 76 7 5 2 SCPI Commands This subsection describes the SCPI subsystem commands for the meter Table 7 3 Some SCPI Symbol Conventions 1 O O scr commands Comtinaons of ser commands ABORT This commend have not any action on the meter SCPI approved e INITiate Subsystem INITiate IMMediate Description This command is defined in the SCPI standard It will initialize the meter but don t affect the settings in the setup menu INITiate IMMediate CONTinuous Boolean Description Set the meter at free run or data hold mode Parameter Boolean On 1 off 0 Example INIT CONT OFF or INIT CONT 0 Set the meter at data hold mode INITiate IMMediate CONTinuous Description Query the meter at which operation mode Response 0 data hold mode or 1 free run mode e CONFigure Subsystem CONFigure SCALar DISPlay RATE SLOW MEDI FAST gt Description Set the measurement rate type Parameter SLOW Select the slow measurement rate MED Select the medium measurement rate FAST Select the fast measurement rate CONFigure SCALar DISPlay RATE Description Return the measurement rate type 77 CONFigure SCALar VOL Tage DC lt numeric value gt 1 2 AC numeric value gt 1
6. Setup L t then to enter the setup mode to configure the remote interface parameters 4 or v to select the each tier menu items lor to select the parameters of the menu item St to enter second tier menu or to store the selected parameter The selected parameter is flashed in primary display Off aa to quit the tier menu To quit from the setup mode and this will save all parameter settings Table 3 7 describes the outline of the setup menu item Some menu items will be not displayed without GPIB interface meter option Table 3 7 Descriptions for Outline of Setup Menu Item First Tier Menu Second Tier Menu 1 Remote Mode Selection 1 Baud Rate 2 Parity 3 Data Bit 2 RS 232 Interface Parameters 4 Stop Bit 5 ECHO 6 Printer Only 1 Address 3 GPIB Interface Parameters 2 Talk 4 Beeper Mode Selection The items will be displayed when GPIB option is installed 27 Table 3 8 indicates the factory settings and user selectable communication parameters by using RS 232 interface standard and GPIB interface option Table 3 8 Communication Parameters Menu Item Factory Setting Selectable Parameters Remote RS 232 RS 232 or GPIB 9600 4800 2400 1200 600 300 Parity None None Odd or Even Data Bit 8 7ors Stop Bit 1 1or2 ECHO OFF ON or OFF Printer Only OFF ON or OFF Addre
7. The 2 annunciator is off in the secondary display area The display remains in Primary display mode 25 e Combination of Dual Display Settings Table 3 6 provides the available combination of inputs for the primary display and secondary display in the dual display mode Table 3 6 Descriptions for Combination of Dual Display Secondary Display Pind Vdc Vac Adc Aac Hz Display Vdc e e e e 1 e e e Adc e e e Aac e e e e 1 e Vac Vdc e 1 Adc 1 e 2 Hz e 2 e 2 e 1 9 e e Pr e e e e e dBm e e e The ranges of the secondary display are set by the primary display 2 The Frequency reading is corresponding to the current input signals other readings are corresponding to the voltage input signals 3 it is recommended to measure the resistance up to 1M Q in dual display mode Note In dual display mode keystroke response time is approximately 0 6 1 second User may need to select and press down a key until the meter responding to the Keystroke 26 3 10 Entering Setup Mode User may select computer interface set RS 232 interface standard or GPIB interface option and beeper mode on Setup Mode To ensure the remote interface will operate appropriately user may need to configure the remote interface parameters by following the procedures as shown below
8. Weight lt 3 0kgs Line Voltage 100V 120V 220V 240V ac 10 50 60Hz 16VA maximum Interface e RS 232 DB 9 male connector e Baud rates 9600 4800 2400 1200 600 300 e Data length 7 or 8 bits e Parity even odd none e Stop bit 1 or 2 bits e Echo on off e Print mode on off Safety Requirement Designed in compliance with EN61010 1 IEC1010 1 Installation Category 750VAC 1000VDC or CAT II 600V Pollution Degree 2 Environment EMC Requirement Designed in compliance with EN61326 1 103 B 1 Introduction Appendix B 5491 Specifications Appendix B describes the complete specifications of the 5491 5 1 2 Digit Dual Display Multimeter B 2 Technical Specifications e Specifications assumptions e One year calibration cycle e Operating temperature at 18 C to 28 C 64 4 F to 82 4 F Accuracy is expressed as of reading digits after 30 minutes warm up e Temperature coefficient Add 0 15 x the applicable accuracy C for 0 C to 18 C and 28 C to 50 C Relative Humidity RH up to 80 for 0 to 28 C 75 RH for 12MQ and above ranges of resistance measurement up to 70 for 28 C to 35 C up to 50 for 35 C to 50 C All specifications are specified under single display mode in operation only e Display Counts and Reading Rates Full Scale Display Counts Slow Med
9. each bit in ESR When a bit in the ESE is 1 the corresponding bit in the ESR is enable When any enabled bit in the ESR changes from 0 to 1 the ESB summary bit bit 5 of the STB register also goes to 1 Use ESE to write to this register and ESE to read this register e Operation Event Register The Operation Event Register assigns specified event to specific Operation Event Status Register bits Operation Status Register Bit O 3 are not used Bit 4 Measuring is set as 1 when the meter is at the end of a measurement cycle Bit 5 6 are not used Bit 7 Compare is set as 1 when the meter is operating in the compare mode Bit 8 2ND is set as 1 when the meter is operating in the dual display mode Bit 9 15 are not used Note Use CLS to clear event registers 74 7 5 Instructions of Command Sets 7 5 1 IEEE 488 2 Common Commands CLS Description Clear the Standard Event Status Register Operation Event Status Register Questionable Data Event Status Register and the Error Queue ESE lt NRf gt Description Set the Standard Event Status Enable Register Parameter lt NRf gt 0 to 255 Example ESE 140 Enable bits 2 QYE 3 DDE and 7 PON and disable all the other bits ESE Description Query the Standard Event Status Enable Register Response Integer Decimal equivalent of the register byte Range is 0 to 255 ESR Description Query the Standard Event Status Enable Register a
10. lt r gt and x parameters are used to set up the secondary display measurements f for specifying Measurement functions r for specifying ranges and x for specifying reading rate f is a necessary parameter for specifying the measurement functions lt f gt parameter is defined by a numeric value from 0 to 9 and character A Because the secondary display can only display DCV ACV DCA ACA and Frequency Hz functions therefore the available parameters are 0 1 4 p and lt r gt is an optional parameter for specifying measurement range The parameter value can be from 0 to 7 If lt r gt parameter is omitted x parameter should be omitted too The meter is set to auto ranging and will stay at the current reading rate X is an optional parameter for specifying a reading rate It is defined by a character S or F in which S is for slow rate for medium rate and F for fast rate If x parameter is not specified the meter will remain on its current reading rate without change Table 6 6 shows all available S2 command parameters and available combinations Example 1 S204S lt f gt lt r gt and x are all specified Set secondary display of the meter to DCV 120V with manual range and at slow reading rate Example 2 5242 x is omitted Set secondary display
11. 0 012 2 10 1MQ 400V 100mV 399 9 0 012 2 10 0MQ 1000V 1V 1000 0 012 2 10 0MQ Rate S Slow M Medium and F Fast 2 Use relative REL modifier 3 in Vdc 1000V range 5 over range 1050Vdc is readable 4 Input Impedance is in paralleled with capacitance lt 120pF e Maximum input voltage 1000Vdc or peak ac on any range e Response Time Approximately 1 0 second when the displayed reading reaches 99 9 dc value of the tested input signal at the same range Note When voltage measurement function is selected the Vdc input impedance is paralleled with an ac coupled 1 1 ac divider Noise Rejection Ratio Rate CMRR NMRR 02 gt 90dB at dc 50 60Hz 0 1 1kQUnbalanced S M F gt 50dB at 50 60Hz 0 1 1 CMRR is the Common Mode Reject Ratio 2 NMRR is the Normal Mode Rejection Ratio 93 e AC Voltage True RMS AC Coupling Mode Resolution and Full Scale Reading Range Resolution Full Scale Reading amp M F M F 120mV 400mV 1yuV 10uV 100uV 119 999 399 99 399 9 1 2V 4V 10uV 100uV 1mV 1 19999 3 9999 3 999 12V 40V 100uV 1mV 10mv 11 9999 39 999 39 99 120V 400V 1mV 10mv 100mv 119 999 399 99 399 9 750V 750V 10mV 100mV 1V 750 00 0 750 0 759 In Vac 750V range 5 over range 787 5V rms is readable Accuracy Pata Range Accuracy 1
12. 6 1 indicates the factory settings and user selectable communication parameters by using RS 232 interface 49 Null Modem Cable 2 2 Q e Q 9 gt Ore ie Ore 9 09 09 O03 Figure 6 1 RS 232 connecting diagrams between the meter and a PC e Setup Procedures for RS 232 Parameter User may select computer interface and set RS 232 interface on Setup Mode To ensure the remote interface will operate appropriately user may need to configure the remote interface parameters Please refer to operation procedures of Section 3 10 Entering Setup Mode Table 6 1 RS 232 Interface Parameters Item Parameter Factory Setting Selectable Parameter Hades Son 9600 4800 2400 1200 600 and 300 2 Parity None None Odd or Even 3 Data Bit 8 7 or 8 4 Stop Bit 1 1or2 5 ECHO OFF ON or OFF 6 Printer Only OFF ON or OFF 50 6 4 Using Commands Note All RS 232 commands must be entered in the upper case 6 4 1 Types of Commands The RS 232 commands are grouped in three types KEY commands SET commands and QUERY commands e Key Commands There are 16 pushbutton keys on the front panel of the meter User may use the Key commands K1 to lt K16 gt for directly simulating a single keystroke by pressing on the front panel push button via RS 232 interface User may also use other Key commands lt 17 gt to lt K20 gt for simulating combin
13. C Maintenance C 1 Introduction Appendix C describes the basic maintenance procedures to the 5 1 2 Digit Dual Display Multimeter Z WARNING To avoid electrical shock or damaging the meter never get water inside the case C 2 Cleaning the Meter Before cleaning the meters make sure the power is switched in OFF position and the power cord is disconnected from the AC outlet To clean the meter wipe the dirty parts with gauze or soft cloth soaked with diluted neutral detergent Do not get too wet to prevent the detergent from penetrating into inside parts and causing damages After cleaning leave the instrument until it dries completely C 3 Configure the Line Voltage A Caution Before setting the line voltage selector the main power should be turned off and remove Power cord from the meter This meter operates on a 100V 120V 220V or 240V AC 50 60Hz line voltage source Extract the fuse drawer from the AC socket with the aid of a screwdriver to move the fuse holder with the voltage selector from the fuse holder Pull out the fuse link from the fuse holder with the voltage selector Replace a new fuse with a rated voltage in accordance with specific required line voltage Select the voltage according to users Local line voltage If the line voltage used is 230V be sure to switch the line voltage selection to 240V 117 C 4 Accessories and Replacement Parts Standard Accessories Supplied Mod
14. FUNCTION TKDATA DECLARE SUB TKECHO DEMO BAS This program set the meter to record Vdc measurement on the primary display and Vac measurement on the secondary display The results will also be printed on the computer screen Runs on MS DOS QBasic 1 1 Microsoft Quick BASIC 4 5 Notice When use this program the RS 232 of the meter should be set the following parameters 1 BAUD 9600 2 DATA 8 BIT 3 PRITY NONE 4 STOP 1BIT 5 6 PRINT OFF This program uses COM1 to communicate with the meter i Version 1 2 Modified By CC Tung May31 2002 OPEN COMI 9600 N 8 1 CD CS DS FOR RANDOM AS 1 Open COMI for communication 9600 baud no parity 8 data bits 1 stop bit ignore Data Carrier Detect DCD Clear To Send CTS and Data Set Ready DSR signals CMD RST Reset the meter PRINT 1 CMD TKECHO TKECHO CMD S101 PRINT 1 CMD TKECHO CMD S211 PRINT 1 CMD TKECHO SLEEP 3 CMD PRINT 1 CMD PRINT TKDATA V TKECHO CMD R2 PRINT 1 CMD PRINT TKDATA V TKECHO CLOSE 1 Send command to the meter Waiting gt and checking if the command is executed successfully Waiting gt to make sure the meter is in power on initial state Set primary display to Vdc function auto ranging mode Send command to the meter Waiting gt and checking if the command is executed
15. Frequency 1 2 1 7 24 ACV DCV 0 4 0 5 0 7 ACA DCA 0 4 0 5 0 7 91 Reading Rates on Dual Display Readings Sec Measurement Functions Slow Medium Fast DCV ACV 0 7 1 0 1 9 DCA ACA 0 7 1 0 1 9 DCV DCA 0 7 1 0 1 9 DCV ACA 0 2 0 2 0 5 ACV ACA 0 2 0 2 0 5 ACV DCA 0 7 1 0 1 9 ACV Frequency 0 5 0 7 1 1 ACA Frequency 0 6 0 8 1 3 ACV DCV DCV 0 5 0 6 0 9 ACA DCA DCV 0 1 0 2 0 4 ACA DCA ACV 0 1 0 2 0 4 ACA DCA DCA 0 5 0 6 0 9 dBm ACV Reference Q 2 1 4 2 11 9 dBm ACV ACV 0 7 1 0 1 7 dBm ACV DCV 0 6 1 0 1 7 dBm ACV Frequency 0 7 1 0 1 7 Note 1 Above table shows some common combinations and applications of using dual display Note 2 Using RS 232 or GPIB remote interface the reading rate approximates to normal mode 92 DC Voltage Resolution Full Scale Reading and Accuracy 1 Full Scale Accuracy Typical Input Rate Range Resolution Reading TC MEE 4 120mV 1uV 119 999 0 012 8 2 10 0MQ 1 2V 10V 1 19999 0 012 5 10 0MQ S 12V 100uV 11 9999 0 012 5 11 1MQ 120V 1mV 119 999 0 012 5 10 1MQ 1000V 10mV 1000 00 0 012 5 10 0MQ 400mV 10uV 399 99 0 012 5 10 0MQ 4V 100uV 3 9999 0 012 5 11 1MQ M 40V 1mV 39 999 0 012 5 10 1MQ 400V 10mV 399 99 0 012 5 10 0MQ 1000V 100mV 1000 0 9 0 012 5 10 0MQ 400mV 100V 399 9 0 012 2 10 0MQ 4V 1mV 3 999 0 012 2 11 1MQ F 40V 10mV 39 99
16. If a signal input is applied to the 12A input terminal the meter will not select the range to 12A automatically User will need to select the current measurement range to 12A manually 2 5 Using the Pushbuttons The meter functions and operations can be selected by pressing the pushbuttons on the front panel select A summary of pushbuttons is shown in Figure 2 4 Pushbuttons can be used in three ways User can e Press a single button to select a function or operation EXAMPLE SY Press oe to select AC volts for the primary display Press a combination of buttons one after the other EXAMPLE 2 5e to select AC volts for the primary display and then d hz to select the frequency measurement S SMFPEAK HOLD REL dBm 42W eel OO EI 0 6 LELEEELELE lt p f Rate Setup Nf Power N Min Local Max Ref Q Hold 1 Power Switch 6 Secondary Display Selection 2 Measurement Function Selection 7 Local Setup 3 Range Comparator Selection 8 Reading Rate Selection 4 Calibration Mode Button 9 Arithmetic Function Selection 5 Shift key 10 Hold Reference Figure 2 4 Front Panel Pushbuttons e Press multiple buttons simultaneously EXAMPLE LN d e H 5 and zd simultaneously to select True RMS AC volts and DC volts calculated on the p
17. Operation 6 1 Introduction Section 6 describes how to operate the meter via standard RS 232 interface It also explains the detail information of all RS 232 interface command sets used in the meter The remote control operation enables the user either to manually operate the meter via a terminal or executes a host computer program automatically 6 2 RS 232 Interface Overview The port serial contains of D type 9 pin male connector on rear panel of the meter is used to communicate the meter with a host computer or terminal via RS 232 standard interface Figure 6 1 shows the RS 232 connecting diagram between the meter and a host computer RS 232 interface is a serial binary data interchange which operates from 300 to 9600 baud rate and the distance between any two RS 232 interface can be extended up to 50 feet RS 232 port of the meter is designed in full duplex which makes the meter more reliable and efficient in data taking 6 3 RS 232 Interface Parameters Set up In order to operate the meter via a host computer or terminal the parameters in RS 232 interface within the meter has to match the parameters in the serial interface provided by the host or terminal The following procedures will guide the user to set up RS 232 interface parameters within the meter to comply RS 232 interface with the host The default settings of the meter at factory are 9600 baud rate non parity 8 data bits and 1 stop bit 9600 n 8 1 Table
18. Reading Rod PLE amp Shunt Resistor 12mA 0 1uA 11 9999 lt 0 15V 100 S 120mA 1 119 999 lt 1 5V 100 12 100A 11 9999 lt 0 6V 0 010 40mA 1pA 39 999 lt 0 5V 100 M 120mA 104A 119 99 1 5V 100 12A 1mA 11 999 0 6V 0 010 40mA 100A 39 99 0 5V 100 F 120mA 100 119 9 lt 1 5V 100 12A 10mA 11 99 0 6V 0 010 1 Typical at full scale reading and rms voltage across the input terminals Accuracy REG Range Accuracy 1 year 1 40 to 50 Hz 50 to 2k Hz 2 to 5 kHz 12mA 2 5 200 1 5 200 3 200 S 120mA 2 5 200 1 5 200 3 200 12A 3 300 3 200 40mA 2 5 80 1 5 80 3 80 M 120mA 2 5 30 1 5 30 3 30 12A 3 30 3 30 40mA 2 5 10 1 5 10 3 10 F 120mA 2 5 5 1 5 5 3 5 12 3 5 3 5 1 Specified accuracy at input gt 5 of full scale e Measurement method True RMS e Maximum Crest Factor 3 0 at full scale e Response Time Approximately 1 5 seconds when the displayed reading reaches 99 9 ac rms value of the tested input signal at the same range 110 e AC Current True RMS AC DC Coupling Mode Resolution Full Scale Reading and Burden Voltage Rate Range Resolution Full Scale Reading ge amp Shunt Resistor 12mA 0 1uA 11 9999 lt 0 15V 100 S 120mA 1 119 999 1 5V 100 12A 100A 11 9999 0 6V 0 010 40mA 1pA 39 999 0 5V 100 M 120mA 10uA 119 99
19. and then read the display The meter will select the appropriate range automatically and an annunciator on the display will indicate the units of the measurement value shown Turn off power to the circuit and disconnect the meter from the tested circuit NOTE After making a high current measurement using the 12A input thermal voltages are generated that may create errors when making high resolution low level dc measurements of volts amps or ohms It requires ten minutes to allow the thermals to settle out before making low level measurements in order to obtain the best accuracy 11 2 VOLTAGE Figure 2 5 Voltage Resistance or Frequency Measurements AY MULTIMETER VY Rate Setup Power Ta x UE ON Ref Rest or Hold Rel 2nd gt gt CURRENT Figure 2 6 Current or Frequency Measurements e Diode and Continuity Tests Each press of Pa toggles the diode and continuity functions Both functions cannot be selected for the secondary display The diode test measures the forward voltage of a semiconductor junction at approximately 0 5mA The beeper generates a single beep tone when the input voltage drops below 0 7V approximately 1 4kQ and generates a continuous beep tone when the input voltage drops belo
20. annunciator remains on when a function button is pressed the secondary display will display the reading taken from the new measurement function selected The summary of ranges and scale values are shown in Table 3 3 and Table 3 4 for slow rate and medium fast rate respectively 21 DUAL DISPLAY MULTIMETER S PEAK HOLD MIN MAX REL dBm 4 2 W 9t en DT ET CL EIL B SU TT Baer auro oe ao cour am M 4 M Ki C E S Y Rate Setup f Min f Local Max Comp Ref Q vf Power Switch 6 Secondary Display Button Measurement Function Buttons 7 Local Setup Button Range Comparator Buttons 8 Reading Rate Button Calibration Mode Button 9 Arithmetic Function Buttons Shift Key 10 Hold Reference Imped Button Figure 3 3 Front Panel Pushbuttons Table 3 3 Range Scale Value in Slow Reading Rate Fees Ranging Py mewemiummmwow e Mm mmuimamamemw CASA Te vA ums ums 200a o om awa aw 120 126 xn aw m ona e wu Pete 1 4200mA for 5492 only 2 10A dc or ac rms continuous 12A dc or ac rms for 30 seconds maximum 3 In order to eliminate the noise interference which might be induced to the test leads it is recommended to use a shielded test cable for measuring resistance above 120KQ 22 Table 3 4 Range Scale Value in Medium Fast Readi
21. input terminals Figure 2 7 Diode Continuity Test BANA RESISTANCE WARNING To avoid damaging to the meter do not apply a voltage exceeding 500 V peak between the input terminals Figure 2 8 2 Wire O Continuity Test 2 7 Rack Mounting User can mount the meter into a standard 19 inch rack using RK 01 for single meter Rack Mount Kit The front and rear protective holsters can be removed when mount the meter into a rack To install RK 01 rack mount kit refer to following procedures and Figure 2 9 or the instructions provided with it 1 Adjusting the handle of the meter to its upward vertical stop position refer to Figure 2 3 and pull the ends all the way out 2 Removing two protective holsters out of the front panel and rear panel of the meter 3 Installing the rack mount ears onto the left and right hand side of the meter frame by using four screws provided with RK 01 4 Paste two blind plates on the handle hole 5 Mount the meter with RK 01 into the standard 19 rack Figure 2 9 Installing the Rack Mount Kit This page is subject to be blank Section 3 Front Panel Operation 3 1 Introduction This section provides a complete description of each operation that can be performed by using the pushbuttons on the front panel All related information for operations and functions are grouped together 3 2 Front Panel Operations The follow
22. internal adjustments 1 3 Options and Accessories At the moment one option is available for 5492 only which option can be installed at the factory and a field installable retrofit kit option is also available IEEE 488 interface Option GP5492 provides full programmability There are two types of programming commands IEEE 488 2 Common Commands and Standard Commands for Programmable Instruments SCPI The SCPI commands used in this device is conformance with the SCPI Standard Version 1993 0 Standard accessories come with the meter are Power cord Protective holsters Front and Rear Operation Manual TL36 Test leads ACOI for TL 36 Maximum Measurement Ratings 1kVdc 10A dc or ac rms continuous and 12 or ac rms for 30 seconds maximum Available optional accessories are listed as below TL35 Test leads 02 Insulation piercing clip AC 02 Lantern tip extension probe for TL 35 AC 03 Alligator clip KCOl dwire test cable set with Kelvin clippers AK 5491 RS 232 PC Link software GP5492 IEEE 488 GPIB Interface Upgrade Only for 5492 RK 01 Rack mount kit used for single meter Maximum Measurement Ratings 1kVdc 10A dc or ac rms continuous and 12A dc or ac rms for 30 seconds maximum 1 4 How to use this manual This manual is designed to help the user to get a quick start Though it is not necessary to read the entire manual to operate the unit effectively we recommend the manual
23. read the display reading without loosing the reading 32 Operation Procedures d to enable Data Hold mode the annunciator HOLD will be shown on the primary display e i again to disable Data Hold mode Note The Data Hold mode can be used for other arithmetic functions such as dBm REL and Min Max e Selecting REL Relative Modifier When the modifier is selected the reading on the primary display is the value difference between Rel relative base and the current measurement value The definitions of REL modifier is defined as follows Displayed reading Measurement value Rel Note The relative function can be selected for primary display only e Setting Rel Relative Base for REL Modifier 2 M to enable the REL modifier and the primary display reading will be stored as a relative base The primary display will then be zeroed and REL annunciator will be lit on the primary display The secondary display will not be affected When REL modifier is selected Rel Shift then to toggle in and out the relative base REL selection SOS E Auto Annunciator REI is lit on the primary display then using j V ee Shift Hold and to change the relative base value for REL modifier calculation again to disable REL modifier Opera
24. returned by the meter reading LEFT rd ibcnt PRINT reading reading Convert READINGS to its numeric value and add to the accumulator sum sum VAL reading NEXT i Continue FOR loop until 10 measurements are read Print the average of the 10 readings PRINT The average of the 10 readings is sum 10 Call the IBONL function to disable the hardware and software 88 CALL ibonl dvm 0 Subroutine DVMERR This subroutine will notify you that the meter returned an invalid serial poll response byte The error message will be printed along with the serial poll response byte The NI 488 function IBONL is called to disable the hardware and software The STOP command will terminate this program SUB dvmerr msg spr STATIC PRINT msg PRINT Status Byte amp H HEX spr 6 Call the IBONL function to disable the hardware and software CALL ibonl dvm 0 STOP END SUB Subroutine GPIBERR This subroutine will notify you that a NI 488 function failed by printing an error message The status variable IBSTA will also be printed in hexadecimal along with the mnemonic meaning of the bit position The status variable IBERR will be printed in decimal along with the mnemonic meaning of the decimal value The status variable IBCNT will be printed in decimal The NI 488 function IBONL is called to disable the hardware and software The STOP command will terminate this program SUB gpiberr msg STATI
25. successfully Set secondary display to Vac function auto ranging mode Send command to the meter Waiting gt and checking if the command is executed successfully Wait for 3 sec Read primary display reading Send command to the meter Print the value on computer screen Waiting gt and checking if the command is executed successfully Read secondary display reading Send command to the meter Print the value on computer screen Waiting gt and checking if the command is executed successfully Release COMI END of the program 63 FUNCTION TKDATA LINE INPUT 1 RDS TKDATA END FUNCTION SUB TKECHO LINE INPUT 1 PROMPTS PROMPTS RIGHTS PROMPTS 2 IF PROMPTS lt gt gt AND PROMPTS lt gt gt THEN LOCATE 24 1 PRINT COMMAND EXECUTE ERROR END IF END SUB Read COM1 Convert a string to numeric value and return the value to main program Get a string from COMI Check if PROMPT lt LF gt gt Discard lt LF gt Tf not successful then Set the printing position to Line 24 column 1 Print error message 64 e Example Program Using Turbo C include lt stdio h gt include lt conio h gt define COMI 0x3f8 define COM2 0x2f8 define COM3 0x3e8 define COM4 0x2e8 define RS232 COMI void init_rs232 void void send char char read void void send buffer char vo
26. to DCA 120mA with manual range and the reading rate will not be affected Example 3 S27 Both r and x are omitted Set secondary display to frequency with auto ranging and the reading rate will not be affected 55 Table 6 6 S1 S2 Commands and lt f gt lt r gt x Parameters Parameter S1 S2 X lt I gt Function lt f gt S Slow M Medium F Fast 0 Auto range Auto range 1 120mV 400mV 2 1 2V 4V vag 9 3 12V 40V 4 120V 400V 5 1000V 1000V 0 Auto range Auto range 1 120mV 400mV Vac 1 2 1 2V 4V 3 12V 40V 4 120V 400V 5 750V 750V 0 Auto range Auto range 1 1200 4000 2 2 1 200 4kQ 1 3 12kQ 40kQ NA 4 120kQ 400kQ 5 1 2MQ 4MQ 3 6 12MO 40MO 7 120MO 300MO 0 Auto range Auto range 4 1 12mA 40mA 2 120mA 120mA P 5 3 1 2A 2 1 24 2 4 12A 12A 1 0 Auto range Auto range Diode 6 N A 1 12 25 0 Auto range Auto range 1 1200Hz 1200Hz Hz 7 2 12kHz 12kHz 3 120kHz 120kHz 4 1MHz 1MHz 0 Auto range Auto range 1 120mV 400mV 1 2 1 2V 4V V ac dc 8 N A 3 12V 40V 4 120V 400V 5 750V 750V 0 Auto range Auto range 1 12 40 A ac dc 9 N A 2 120mA 120mA 3 1 2 2 1 2 2 4 12 12 0 1200 4000 1 1200 4000 2 1 2kQ 4kQ Continuity A N A 1 3 12kQ 40kQ Q 2 wire 4 120kQ 400kQ 5 1 2MQ 4MQ 6 12MQ 40MQ 7 120MQ 300MQ 1 Not Applicable For 5492 only 56 Table 6 7 De
27. to be read thoroughly in order to use the meter to its full advantages First scan the Tables of contents to be familiar with the outline of the manual Then read Getting Started in Section 2 2 Refer to the appropriate section of the manual as needed The contents of each section are summarized below Section 1 Introduction Introducing the general information of features options accessories and operation manual for the 5 1 2 digit Dual Display Multimeters Section 2 Getting Started Introducing how to prepare the meter for operation and to start taking basic front panel operations and measurements quickly Section 3 Operating the Meter from the Front Panel Providing a complete description of each operation which can be performed by using the pushbuttons on the front panel All related information for operations and functions are grouped together Section 4 Measurement Application Examples Describing how to use the meter in more advanced and sophisticated operations and applications Section 5 Calibrating the Meter Describing the basic information to calibrate the meter if necessary Section 6 RS 232 Remote Operation Describing how to connect the meter to a terminal or a host computer and operate the meter via RS 232 interface Section 7 GPIB Remote Operation 5492 Option Describing how to connect the meter to a terminal or a host computer and operate the meter via GPIB interface Appendices
28. 000 5000 3000 2500 1500 1350 1250 1240 1100 930 750 500 160 80 40 20 If reference impedance 2 4 8 or 16Q is selected the dBm modifier is displayed in Watts power Operation procedures Condition 1 PA Ga d uf on the secondary display Va 1 PAR L eo sht to store the selected value then the reference impedance currently used will be displayed or Vv to scroll to the desired value of reference impedance Operation Example Set the reference impedance to 1000Q for dBm calculation S AUTO AC e g Me OC A d EI w Ref Q 5 2 shift Hal Pl Shit p n AUTO 30 Ld m J Condition 2 LN Z Y Z 2 then e to enter dBm calculation mode p ES r p or to scroll to the desired impedance value shown as the following operation example Operation Example S ELE EI d COL IU w Bm Z 2 NET Ayia BI UU A EXIT e Using MINMAX Modifier for Dynamic Recording MINMAX modifier enables the meter to store the minimum and the maximum input signals measured since the MINMAX modifier was selected The definitions of MIN and are defined as follows MIN Minimum value of calculation results for measured signal MAX Maximum value of calculation results If MAX modifier is se
29. 0V 100uV 1mV 10mV 11 9999 39 999 39 99 120V 400V 1mV 10mV 100mV 119 999 399 99 399 9 750V 750V i0mV 100mv 1V 750 00 750 0 759 7 In Vac 750V range 5 over range 787 5V rms is readable Accuracy Rate Range Accuracy 1 year 1 40 to 50 Hz 50 to 5k Hz 5 to 30 kHz 120 000mV 2 200 1 5 200 3 300 1 20000V 2 200 1 5 200 3 300 12 0000V 2 200 1 5 200 3 300 120 000V 2 200 1 5 200 3 300 750 00V 2 200 1 5 200 3 300 2 400 00mV 2 80 1 5 80 3 100 4 0000V 2 80 1 5 80 3 100 M 40 000V 2 80 1 5 80 3 100 400 00V 2 80 1 5 80 3 100 2 750 0V 2 80 1 5 80 3 100 2 400 0mV 2 10 1 5 10 3 12 4 000V 2 10 1 5 10 3 12 F 40 00V 2 10 1 5 10 3 12 400 0V 2 10 1 5 10 3 12 750V 2 10 1 5 10 3 12 2 1 Specified accuracy at input gt 5 of full scale 2 Specified accuracy for input voltage at frequency lt 20kHz e Measurement method True RMS e Maximum Crest Factor 3 0 at full scale e Maximum input voltage 750V rms 1100V peak ac 2 107 V Hz product on any range normal mode input 1x106 v Hz product on any range common mode input e Input Impedance 1MQ in parallel with capacitance 120pF e Response Time Approximately 1 5 seconds when the displayed reading reaches 99 9 ac rms value of the tested input signal at the same range 107 e AC Voltage True RMS AC DC Co
30. 0kQ 10 39 999 50A 0 12 3 0 1 3 M 400kQ 100 399 99 5uA 0 12 3 0 1 3 4MQ 1000 3 9999 500nA 0 2 3 0 2 3 40MQ 1kQ 39 999 50nA 1 5 3 1 5 3 300MQ 10kQ 299 99 10nA 5 0 5 5 0 5 4000 100mQ 399 9 0 5mA 0 15 2 2 0 195 2 4kQ 10 3 999 100pA 0 12 2 0 1 2 40kQ 100 39 99 50A 0 12 2 0 1 2 F 400kQ 1000 399 9 5A 0 12 2 0 1 2 4MQ 1kQ 3 999 500nA 0 2 2 0 2 2 40MQ 10kQ 39 99 50nA 1 5 2 1 5 2 300MQ 100kQ 299 9 10nA 5 0 2 5 0 2 1 In order to eliminate the noise interference which might be induced to the test leads it is recommended to use a shielded test cable for measuring resistance above 120KQ 2 Use relative REL modifier Open Circuit Voltage lt 5 0V dc e Zeroing error 0 050 or less excluding test lead resistances in each range when REL modifier is used e Response time Approximately 1 5 seconds for 12MQ and ranges below 12M O approximately 5 seconds for 40MQ range approximately 10 seconds for 120MQ approximately 25 seconds for 300MQ range e Maximum Input Protection 500V dc or ac rms 112 e Diode Test Continuity Rate Maximum Reading Resolution S 1 19999V 10uV M 2 4999V 100uV F 2 499V 1mV Open Circuit Voltage lt 5 0V dc e Test Current Approximately 0 5mA dc e Audible Tone Continuous beep for continuity and single tone for normal forward biased diode or semiconductor junction e Continuity le
31. 0pF e Response Time Approximately 2 5 seconds when the displayed reading reaches 99 9 ac dc rms value of the tested input signal at the same range 108 e DC Current Rate Range Resolution 1 eee j Reading amp Shunt Resistor 12 0 1pA 11 9999 0 1 20 0 15V 100 S 120mA 1 119 999 0 1 8 lt 1 5V 100 12A 1004A 11 9999 0 5 8 0 6V 0 010 40mA 1 39 999 0 2 8 lt 0 5V 100 M 120mA 10 119 99 0 2 3 1 5V 100 12A 1mA 11 999 0 5 3 lt 0 6V 0 010 40mA 10 39 99 0 2 2 lt 0 5V 100 F 120mA 1004A 119 9 0 2 2 1 5V 100 12A 10mA 11 99 0 5 2 lt 0 6V 0 010 1 Typical at full scale reading and voltage across the input terminals 2 Use relative REL modifier Maximum Input and Overload Current Protection for dc and ac current mA Input Terminal 1200mA dc or ac rms and protected with 2A 250V IEC 127 sheet 1 fast blow fuse 12A input terminal 10A dc or ac rms continuous or 12A dc or ac rms for 30 seconds maximum and protected with 15A 500V breaking capacity 10 000A fast blow fuse e Response Time Approximately 1 0 second when the displayed reading reaches 99 9 dc value of the tested input signal at the same range 109 e AC Current True RMS AC Coupling Mode Resolution Full Scale Reading and Burden Voltage Rate Range Resolution Full Scale
32. 1 5V 100 12A 1mA 11 999 0 6V 0 010 40mA 104A 39 99 0 5V 100 F 120mA 100uA 119 9 1 5V 100 12A 10mA 11 99 0 6V 0 010 1 Typical at full scale reading and rms voltage across the input terminals Accuracy RS Range Accuracy 1 year 1 50 to 2k Hz 2 to 5 kHz 12mA 1 5 200 3 200 S 120mA 1 5 200 3 200 12A 3 200 40mA 1 5 82 3 82 M 120mA 1 5 32 3 32 12A 3 32 40mA 1 5 12 3 12 120 1 5 7 3 7 12 3 7 1 Specified accuracy at input gt 5 of full scale e Measurement range Vdc and Vac are automatically set at the same range e Measurement method True RMS AC DC e Maximum Crest Factor 3 0 at full scale e Response Time Approximately 2 5 seconds when the displayed reading reaches 99 9 rms value of the tested input signal at the same range 111 e Resistance 2 wire O and 4 wire H 1 Full Scale Test Accuracy 1 year ate Range Resolution Reading Current 2 wire 4 wire 1200 1mQ 119 999 0 5mA 0 15 8 2 0 1 8 2 1 2kQ 10 1 19999 0 5mA 0 12 5 0 1 5 2 12kQ 100mQ 11 9999 100 0 12 5 2 0 1 5 S 120kQ 10 119 999 100A 0 12 5 0 15 5 1 2MQ 100 1 19999 1uA 0 12 5 0 1 5 12MQ 1000 11 9999 100nA 0 5 5 0 5 5 120MQ 1kQ 119 999 10nA 3 5 8 3 5 8 4000 10mQ 399 99 0 5mA 0 15 5 2 0 1 5 2 4kQ 100ma 3 9999 100 0 12 3 2 0 1 3 4
33. 19999 0 005 2 0 5V rms 1 Specified accuracy at input gt 5 of full scale 2 If tested frequency is greater than 1MHz it will be displayed but no specified accuracy is guaranteed e Measurement method True RMS e Maximum Crest Factor 3 0 at full scale e Maximum input voltage 750V rms 1100V peak ac 2x107 V Hz product on any range normal mode input 1x106 v Hz product on any range common mode input e Input Impedance 1MQ in parallel with capacitance 120pF e Response Time Approximately 1 2 seconds when the displayed reading reaches 99 9 frequency value of the tested input signal at the same range 101 e dBm decibel calculation Reference Impedance 20 2 500 1350 8000 40 750 1500 9000 ao 930 2500 10000 160 2 1100 3000 12000 1240 5000 80000 1250 6000 1 Reference impedance is displayed the secondary display 2 Reading displayed in watts Audio Power 3 Default reference impedance Range and Accuracy Voltage dBm 3 Range 1 2 Input Voltage 20 to 45 to 10 to Range 6000 Ref 45 Hz 10k Hz 100 kHz 120mV 6mV 120mV 42 20 16 20 1 0 0 2 1 0 1 2V 120mV 1 2V 16 20 3 80 0 8 0 1 0 8 12V 1 2V 12V 3 80 23 80 0 8 0 1 0 8 120V 12V 120V 23 80 43 80 0 8 0 1 0 8 1000V dc 120V 1000V 43 80 62 22 _ 9 _ 750V 120V 750V 43 80 59 72 400mV 20mV 400mV 31 76 5 74 1 0 0 2 1 0 4V 400mV 4
34. 2 numeric value 1 DCAC numeric value 1 Description Set the primary and secondary display to voltage measurement function for the DCV ACV or AC DC mode The numeric value parameter is used to configure the measurement range 1 2 has the same syntax as SCPI channel list syntax Use 1 to select the primary display function and Q2 to select the secondary display function Parameter numeric value For volts range 0 12 0 4 1 2 4 12 40 120 400 750 1000 V 91 1 02 For the primary display and secondary display setting Example CONF VOLT DC Set the primary display to DC volts CONF VOLT AC 2 Set the secondary display to AC volts CONF VOLT ACDC 0 12 1 Set the primary display to AC DC volts 120mV range CONFigure SCALar CURRent DC lt numeric value gt 91 1 92 AC lt numeric value gt 1 2 ACDC lt numeric value gt 1 DCAC lt numeric value gt 1 Description Set the primary and secondary display to current measurement function for the DCA ACA or AC DC mode The lt numeric value gt parameter is used to configure the measurement range 1 1 2 has the same syntax as SCPI lt channel_list gt syntax Use 1 to select the primary display function and 2 to select the secondary display function Parameter numeric value For current range 0 012 0 04 0 12 1 2 12 A 1 1 2 For the primary an
35. 2A to Lo 12A 2 dc or ac rms Q VUQUHz to Lo 500V dc or acrms VUQUHz to Lo 500V dc or acrms Sense Hi to Sense Lo 250V dc or ac rms Any terminal to earth 1000V dc or peak ac Up to 1200mA for 5492 up to 120mA only for 5491 2 10A dc or ac rms continuous and 12A dc or ac rms for 30 seconds maximum 20 3 5 Initialization of Measurement Conditions e Power up default configuration Status When turning the meter on it assumes its power up configuration The power up configuration set at the factory is shown in Table 3 2 As configuration data for IEEE 488 address RS 232 baud rate data bit stop bit parity and echo are stored in the non volatile memory they are not changed when power is cycled off and on until the configurations are changed by the user Table 3 2 Default configuration Status Function YC Reading Rate Slow Mode 120 000 Counts Secondary Display mode Secondary Display mode OFF CA mode 1 Hi 199999 199999E 0 Comparator Lo 000000 000000E 0 Constant 3 6 Selecting A Measurement Function Press a function button shown in Figure 3 3 to select a measurement function To select ac dc total true RMS readings press and or and Simultaneously When user selects a function annunciator turns on to indicate the function selected If the secondary display has been selected and the 2ND function
36. 4 to turn on DND annunciator in secondary display A V 5 m to select Frequency Hz measurement function for secondary display 4 or to select auto ranging or manual range for 6 E secondary display Off md may turn off secondary display Note 1 Press uil then Note 2 Regarding secondary display function setting please refer to Section 3 10 43 4 3 Measuring Resistance by using 2 wire Mode 1 Connect a resistor under test to V O Hz and Lo input terminals as shown below gt AL AY MULTIMETER rs O lr s 2w CAL HEEL CEU 2 LI tL sw f Power l D V ay adn Hz Mn Loca shift 2 a 7 Comp do A a res poa and CJ EL m RESISTANCE Co NWARNING Do not apply a voltage exceeding 500 V peak between Hz and Lo input terminals 2 E EA to select the 2 wire Q measurement function 2 W annunciator will be on in the primary display 3 e i or v to select auto ranging or manual range for primary display Note When measuring low resistance use REL modifier function to reduce the measurement error created by the test leads resistan
37. Appendix A 5492 Specifications Appendix B 5491 Specifications Appendix C Maintenance Section 2 Getting Started 2 1 Introduction Section 2 describes the front panel operational keys displays input terminals and rear panel of the meter adjusting handle explains general operating features 2 2 Getting Started e Unpacking and Inspecting the Meter Carefully remove the meter from its shipping container and inspect it for possible damage or missing items If the meter is damaged or something is missing contact the place of purchase immediately Save the container and packing material in case user has to return the meter e Front Panel The front panel shown in Figure 2 1 has three main elements the input terminals on the left the primary secondary displays and the pushbuttons The pushbuttons are used to select major functions ranging operations and function modifiers These elements are described in detail in Section 3 Front Panel mA Fuse Protective Holster Receptacle N So le 24 A N 2 E Primary Secondary Power Display Display Switch SMF PEAK HOLD MIN MANIKEL dBm 4 2 W em 1 el CIO LT EI TED ICE TL ve ac coup ont Y w Y Rate Setup He A Q 2w 4w k J X f x V Local Shift Min Max KT UEM A HDAC A dBm f Comp Lo Rei A A Auto Hold gr gt Input Function Ranging Arithmetic 2
38. C PRINT msg PRINT ibsta amp H HEXS ibsta 6 lt IF ibsta AND EERR THEN PRINT ERR IF ibsta AND TIMO THEN PRINT TIMO IF ibsta AND EEND THEN PRINT END IF ibsta AND SROI THEN PRINT SROI IF ibsta AND ROS THEN PRINT ROS IF ibsta AND SPOLL THEN PRINT SPOLL IF ibsta AND EEVENT THEN PRINT EVENT IF ibsta AND CMPL THEN PRINT CMPL 89 IF ibsta AND LOK THEN PRINT LOK IF ibsta AND RREM THEN PRINT REM IF ibsta AND CIC THEN PRINT CIC IF ibsta AND AATN THEN PRINT ATN IF ibsta AND TACS THEN PRINT TACS IF ibsta AND LACS THEN PRINT LACS IF ibsta AND DTAS THEN PRINT DTAS IF ibsta AND DCAS THEN PRINT DCAS PRIN gt PRINT iberr iberr IF iberr EDVR THEN PRINT EDVR lt DOS Error gt IF iberr ECIC THEN PRINT ECIC lt Not CIC gt IF iberr ENOL THEN PRINT ENOL lt No Listener gt IF iberr EADR THEN PRINT EADR lt Address error gt IF iberr EARG THEN PRINT EARG lt Invalid argument gt IF iberr ESAC THEN PRINT ESAC lt Not Sys Ctrlr gt IF iberr EABO THEN PRINT EABO lt Op aborted gt IF iberr ENEB THEN PRINT ENEB lt No GPIB board gt IF iberr EOIP THEN PRINT EOIP lt Async I O in prg gt IF iberr ECAP THEN PRINT ECAP No capability gt IF iberr EFSO THEN PRINT EFSO File sys error gt IF iberr EBUS THEN PRINT EBUS Command error gt IF iberr ESTB THEN PRIN
39. DATA lt number value gt RECord MINimum RELative BASE number value STAT lt Boolean gt MODE INITiate IMMediate Set dBm reference impedance Set and query the comparator Set the dynamic recording mode Set the relative base Query the calculation function Reset meter without changing setup CONTinuous Set the meter at free run or data hold operation mode CONTinuous READ Query the operation mode Read the display value READ SYSTem Read the both display values Subsystem ERRor Read the error message VERSion Return the firmware version Note Std commands means defined in SCPI standard and New commands are not defined 7 6 Remote Program Examples using GPIB interface e Example Using Quick BASIC GPIBEXAMPLE BAS This sample program is for reference only It can only be expected to function with a Digital Multimeter This program reads 10 measurements from the meter and averages the sum The status variables IBSTA IBERR and IBCNT are defined in QBDECL BAS Each bit of IBSTA and each value of IBERR are defined in QBDECL BAS as a mnemonic constant for easy recognition in application programs In this example these mnemonic definitions are logically ANDed with the variable IBSTA to determine if a particular bit has been set The mnemonic definitions are equated with the variable IBERR to determine
40. Display Shift Terminals Buttons Buttons Buttons Selection Button Figure 2 1 Front Panel e Rear Panel The rear panel shown in Figure 2 2 contains a line fuse the power line cord connector an RS 232 interface connector and a cutout for IEEE 488 interface optional connector e Line Power e Figure 2 2 illustrates the location of the Line Voltage Selector with Fuse Holder housing If user has already done so plug the line cord into the connector on the rear of the meter The meter will operate at any line voltage between 90Vac and 264Vac when line voltage selector is set properly and its frequency range is at 50 60Hz For operation safety DO NOT APPLY a line voltage that exceeds the range specified to line cord connector on the rear panel of the meter IEEE 488 I F Connector Power Line Cord Connector RS 232 Connector Earth Ground Terminal Screw Line Voltage Selector with Line Voltage Fuse Panel Fuse Holder Housing Selection Table Protective Holster Available with IEEE 488 Interface Option only Otherwise covered with Plastic Decal Figure 2 2 Rear Panel N CAUTION BEFORE TURNING THE METER ON MAKE SURE THE LINE VOLTAGE SELECTOR IS SET TO THE CORRECT POSITION FOR APPLIED LINE VOLTAGE TO THE POWER LINE CORD CONNECTOR e The line voltage selector is settable for 100Vac 120Vac 220Vac and 240Vac line voltages e T
41. F S M F 120mV 400mV 1pV 10uV 100uV 119 999 399 99 399 9 1 2V 4V 10uV 100uV 1mV 1 19999 3 9999 3 999 12V 40V 100uV 1mV 10mV 11 9999 39 999 39 99 120V 400V 1mV 10mV 100mV 119 999 399 99 399 9 750V 750 10mV 100mV 1V 750 00 750 0 7 750 7 Vdc and Vac are automatically set at the same range 2 in 750V range 5 over range 787 5V rms is readable Accuracy Rate Range Accuracy 1 year 1 45 to 10k Hz 10 to 30 kHz 30 to 100 kHz 120 000mV 0 2 100 1 5 300 5 300 1 20000V 0 2 100 1 100 3 200 S 12 0000V 0 2 100 1 100 3 200 120 000V 0 2 100 1 100 3 200 750 00V 0 2 100 1 100 3 200 2 400 00mV 0 2 45 1 5 83 5 125 4 0000V 0 2 43 1 43 3 83 M 40 000V 0 2 43 1 43 3 83 400 00V 0 2 43 1 43 3 83 750 0V 0 2 43 1 43 3 83 2 400 0mV 0 2 7 1 5 12 5 18 4 000V 0 2 7 1 7 3 12 F 40 00V 0 2 7 1 7 3 12 400 0 0 2 7 1 7 3 12 750V 0 2 7 1 7 3 12 2 1 Specified accuracy at input gt 5 of full scale 2 For input lt 500V rms e Measurement method True RMS AC DC Maximum Crest Factor 3 0 at full scale e Maximum input voltage 750V rms 1100V peak ac 2 107 V Hz product on any range normal mode input 1x106 v Hz product on any range common mode input e Input Impedance 1MQ in parallel with capacitance lt 120pF e Response Time Approximately 2 5 second
42. MM lt literal gt form of the literal used as the command parameter BUS DC AC 71 7 4 3 Status Reporting The meter status registers conform to the SCPI and IEEE 488 2 standards e Status Byte Register STB Foren ROS MSS Ese wav oues zo o 9 Bit O 1 are not used Bit 2 ERRQ This bit indicates whether or not the Error Queue is empty It s set to 1 when the Error Queue is not empty Bit 3 QUES Summarizes the Questionable Data Signal Status Event Register It s set to 1 when one or more enable Questionable Event Register are set to TRUE Bit 4 MAV Summarizes the Output Queue It s set to 1 when the Output Queue is not empty Bit 5 ESB Summarizes the Standard Event Status Register ESR It s set to 1 when one or more enable ESR bits are 1 Bit 6 ROS MSS Requesting service and Master summary status When RQS bit is set to 1 the meter asserts the SRQ control line on the IEEE 488 interface You can do a serial poll to read the Status Byte Register When STB is used to read the Status Byte Register the MSS bit indicates the Master summary status Bit 7 OPER Summarizes the Operation Status Event Register It s set to 1 when one or more enable Operation Status Event Register are set to TRUE Note 1 The Status Byte Register can be read with either a serial poll or the STB query 2 The register is cleared at power up 72 e Service Request E
43. Mode Resolution Full Scale Reading and Burden Voltage Rate Range Resolution Full Scale Reading Sees ii amp Shunt Resistor 12mA 0 1 11 9999 lt 0 15V 100 120mA 1pA 119 999 lt 1 5V 100 1200mA 10A 1199 99 lt 0 3V 0 10 12A 100A 11 9999 lt 0 6V 0 010 40mA 1 39 999 0 5V 100 120mA 10 119 99 1 5V 100 i 1200mA 100A 1199 9 lt 0 3V 0 10 12A 1 11 999 0 6V 0 010 40mA 10 39 99 0 5V 100 120mA 100A 119 9 lt 1 5V 100 1200mA 1mA 1199 lt 0 3V 0 10 12A 10mA 11 99 0 6V 0 010 1 Typical at full scale reading and rms voltage across the input terminals Accuracy HU Range Accuracy 1 year 45 to 2k Hz 2 to 10 kHz 12mA 0 5 100 2 200 120mA 0 5 100 2 200 1200mA 0 5 100 2 200 12A 1 100 40mA 0 5 42 2 80 120mA 0 5 15 2 30 1200mA 0 5 15 2 30 12A 1 15 40 0 5 7 2 12 120 0 5 4 2 7 1200mA 0 596 4 2 7 12A 1 4 1 Specified accuracy at input gt 5 of full scale e Measurement range Vdc and Vac are automatically set at the same range e Measurement method True RMS AC DC e Maximum Crest Factor 3 0 at full scale e Response Time Approximately 2 5 seconds when the displayed reading reaches 99 9 rms value of the tested input signal at the same range 98 e Resistance 2 wire O and 4 wire 1 Full Scale Test Ac
44. Section 1 Introduction 1 1 Introducing the 5 1 2 Digit Dual Display Bench Multimeters NOTE 1 This operation manual contains information and warning that must be followed to ensure user operation safety and to retain the meter safety condition 2 The term 5492 and 5491 will be used to refer to respective models when descriptions for either model is applied 3 The term meter will be used to refer to both 5492 and 5491 when descriptions are applied to both models AA Precaution TO ENSURE PERSONAL SAFETY AND TO AVOID DAMAGING THE METER AND THE EQUIPMENT CONNECTED READ GETTING STARTED IN SECTION 2 2 BEFORE USING THE METERS The Dual Display Multimeter 5492 amp 5491 also referred to as the meter in this manual are 5 1 2 d igit multimeters with 120 000 count high resolution Both meters are designed for bench top field service and system applications with a high performance price ratio Complete specifications are provided in Appendix A for 5492 and B for 5491 respectively With the RS 232 computer interface standard the meter is fully programmable for use on the RS 232 interface With the IEEE 488 computer interface optional installed the 5492 is fully programmable for use on IEEE 488 1 interface bus 1987 The meter is also designed in compliance with supplemental standard 488 2 1987 1 2 Features The main features provided by the meter are
45. T ESTB lt Status byte lost gt IF iberr THEN PRINT ESRQ lt SRQ stuck on gt IF iberr ETAB THEN PRINT ETAB Table Overflow PRINT ibcnt ibcnt 6 Call the IBONL function to disable the hardware and software CALL ibonl dvm 0 STOP END SUB 90 Appendix A 5492 Specifications A 1 Introduction Appendix A describes the complete specifications of the 5492 5 1 2 Digit Dual Display Multimeter A 2 Technical Specifications e Specifications assumptions e One year calibration cycle e Operating temperature at 18 C to 28 C 64 4 F to 82 4 F Accuracy is expressed as of reading digits after 30 minutes warm up e Temperature coefficient Add 0 15 x the applicable accuracy C for 0 C to 18 C and 28 C to 50 C Relative Humidity RH up to 80 for 0 to 28 C 75 RH for 12MQ and above ranges of resistance measurement up to 70 for 28 C to 35 C up to 5096 for 35 C to 50 C All specifications are specified under single display mode in operation only e Display Counts and Reading Rates Full Scale Display Counts Slow Medium Fast 119 999 39 999 3 999 Reading Rates on Single Display Readings Sec Measurement Functions Slow Medium Fast DCV 2 5 20 DCA 2 5 20 Diode 2 5 20 ACV 2 4 2 20 ACA 2 4 2 20 2 wires Q 2 4 17 4 wires O 4MQ 1 2MQ range and below 0 6 0 8 0 9 4 wires 12M O range and above 1 4 1 7 1 9
46. V 5 74 14 26 0 8 0 1 0 8 40V 4V 40V 14 26 34 26 0 8 0 1 0 8 S EIS 400V 40V 400V 34 26 54 26 0 8 0 1 0 8 1000V dc 400V 1000V 54 26 62 22 3 NT _ 750 400V 750V 54 26 59 72 2 in Vac 750V range 5 over range is readable 1 Auto ranging is used when dBm function is selected 3 Reading displayed in dB when REL modifier is used 0 For input voltage at frequency between 45Hz to 1kHz 0dBm 1 mW 6000 Reference Impedance e Resolution 0 01dB at slow and medium rate 0 1dB at fast rate for all ranges e CMRR gt 90dB for dc signal Response Time Same as ac voltage and ac current measurements 102 A 3 General Specifications General Items Specifications Warm up time At least 30 minutes Temperature Coefficient Add 0 15 x the applicable accuracy C at 0 C to 18 C and 28 C to 50 C Operating Temperature 0 C to 50 C 32 F to 122 F Storage Temperature 20 C to 60 C Altitude Up to 2000 M Pollution Degree Over voltage Category CAT II 600V and CAT 1 1000V Relative Humidity e Up to 80 for 0 C to 28 C 75 RH for 12MQ and above ranges of resistance measurement Up to 70 for 28 C to 35 C e Up to 50 for 35 C to 50 C Common Mode Voltage 1000V dc or peak ac rms maximum between any input and earth ground Dimension Approx 255 w x 105 h x 305 d mm with holsters
47. V 1000 00 0 02 5 10 0MQ 400mV 10uV 399 99 0 02 5 10 0MQ 4V 100uV 3 9999 0 02 5 11 1MQ M 40V 1mV 39 999 0 02 5 10 1MQ 400V 10mV 399 99 0 02 5 10 0MQ 1000V 100mV 1000 0 0 02 5 10 0MQ 400mV 100V 399 9 0 02 2 10 0MQ 4V 1mV 3 999 0 02 2 11 1MQ F 40V 10mV 39 99 0 02 2 10 1MQ 400V 100mV 399 9 0 02 2 10 0MQ 1000V 1V 1000 3 0 02 2 10 0MQ Rate S Slow M Medium and F Fast 2 Use relative REL modifier 3 in Vdc 1000V range 5 over range 1050Vdc is readable 4 Input Impedance is in paralleled with capacitance 120pF e Maximum input voltage 1000Vdc or peak ac on any range e Response Time Approximately 1 0 second when the displayed reading reaches 99 9 dc value of the tested input signal at the same range Note When voltage measurement function is selected the Vdc input impedance is paralleled with an ac coupled 1 1 ac divider Noise Rejection Ratio Rate CMRR NMRR 02 gt 90dB at dc 50 60Hz 0 1 S M F gt 50dB at 50 60Hz 0 1 1kQUnbalanced CMRR is the Common Mode Reject Ratio 2 NMRR is the Normal Mode Rejection Ratio 106 AC Voltage True RMS AC Coupling Mode Resolution and Full Scale Reading Range Resolution Full Scale Reading S M amp F S M F S M F 120mV 400mV 1pV 10uV 100uV 119 999 399 99 399 9 1 2V 4V 10uV 100uV 1mV 1 19999 3 9999 3 999 12V 4
48. able 6 12 Table 6 11 Descriptions for RO Command and Response Syntax Response Description RO RO command is used to read the status of the meter The meter will respond the following character string lt h hg gt lt 9 192 gt lt V gt lt X gt lt f gt lt I gt lt fo gt lt Io gt Response Description lt h ho gt lt h hz gt is a two digit hex number each digit contains 4 bit binary codes Bit 7 4 and Bit 3 0 respectively to represent eight types of status about the meter lt h gt and hz representations are described as follows lt gt indicates the results of compare COMP function and whether the meter is operating in a dual display mode lt h2 gt represents the ON OFF status for other four types of arithmetic function Example If lt h h2 gt contains a character string A8 convert it to an 8 bit binary format 10101000 that means the meter is in Dual display mode compare function is ON and the result of compare is Pass h hz Bit Status 0 1 7 Compare mode off on 6 Relative mode off on hi 5 dB mode off on 4 dBm mode off on 3 Display Mode Single Dual 2 Hi hz 1 Compare Result 0 Lo 59 Table 6 11 Descriptions for RO Command and Response cont d Response Description lt 9192 gt lt 9192 gt is a two di
49. ally as shown in above example MEL Measurement Reading Ne Comp JANT shit lt AL Note Arithmetic functions can be operated for primary display only 36 Table 3 9 Descriptions for Combined Arithmetic Functions Arithmetic Function oe Result Description Operation Sequence Generated The measurement value is calculated 5 to a dBm modifier 2 REL dBm result O is taken as a REL base Min value of relative dB is recorded as a new REL base Max value of relative dB is recorded as anew REL base A COMP is performed to based on the 5 COMP results of and 3 14 Entering Calibration Mode A CAUTION TO AVOID DAMAGING THE DEFAULT CALIBRATION DATA STORED IN NON VOLATILE MEMORY A CALIBRATION TO THE METER CAN ONLY BE DONE BY AN AUTHORIZED SERVICE CENTER WITH APPROPRIATE EQUIPMENT THE WARRANTY IS NOT GUARANTEED IF THE SEALED LABEL ON THE CAL BUTTON LOCATED ON THE FRONT PANEL DISPLAY SCREEN IS BROKEN FOR MORE INFORMATION ABOUT CALIBRATION REFER TO SECTION 5 CALIBRATING THE METER The meter is designed with closed case calibration capability no internal adjustment To enter calibration mode by pressing the CAL button located on the upper right position of the front panel 37 This page is subject to be blank 38 Section 4 Measurement Application Examples 4 1 Introduction Section 4 describes some ad
50. ation keystroke functions see complete Key commands description on Table 6 3 For example user may use the following command sets to select the meter at Vdc 120V measurement range Step Command Equivalent Keystroke Response 1 lt K1 gt Select Vdc function 2 lt 9 gt Select range 3 lt 9 gt Select one more range up 4 lt 9 gt Select one more range up 5 lt 9 gt Select one more range up at 1000Vdc 6 lt K10 gt Select one range down to 120Vdc This above operations will be more complicated and time consuming but it would be convenient for special applications and make a virtual instrument application easier Please refer to Section 6 5 1 for detail information about Key Commands e Set Commands Unlike Key commends Set command controls the meter operations through a string of commands For example to set the meter at Vdc 120V range user may only need one command string S104 S for setting 1 for primary display 0 for Vdc function 4 for 120V range Please refer to Section 6 5 2 for detail information about Set Commands 51 e Query Commands The purpose of Query commands is used for requesting the meter to respond its current status An example of a query command R1 is used for requesting the meter to respond its primary display characters Please refer to Section 6 5 3 for detail information about Query Commands 6 4 2 Command Syntax e Ech
51. ature of 19 26 C and a relative humidity of below 75 5 3 Warm up Allow up to at least 60 minutes warm up time before performing calibration or a verification test to the meter After exposure or storage in a high humidity condensing environment 2 hours warm up time is essentially required 47 5 4 Recommended Test Equipment The test equipment requirements listed in Table 5 1 or equivalents are required to perform the calibration and performance verification test procedures Alternative equipment may be used as long as the accuracy is at least as good as those listed Table 5 1 Standard Equipment Requirements Standard Operating Accuracy Recommended Source Range Required Equipment DC Volt Fluke 5520A vonage Range 0 to 1000VDC lt 0 002 p i Calibrator equivalent AC Volt Fluke 5520A vonage Range 0 to 750V 1kHz lt 0 03 and Calibrator equivalent DC Current 10mA to 100mA lt 0 01 Fluke 5520A or Calibrator 1A to 10A lt 0 03 equivalent AC Current 10mA to 1000mA 1kHz lt 0 1 Fluke 5520A or Calibrator 1A to 10A 1kHz t 0 2 9 equivalent 1000 3600 1kQ 3 6k Fluke 5520A 10kO 36kO 100kQ lt 0 01 Hd ous i Resistance 360kQ 1MQ 3 6MQ Calibrator 10M9 20M9 lt 0 05 Fluke 5520A or 100M9 200MQ lt 0 5 equivalent Audio Level Fluke 5520A 4010 evel 4V 1000Hz lt 0 001 yi 2 Generator equivalent 48 Section 6 RS 232 Remote
52. ce and contact resistance in the test loop 0 1Q 0 50 typical 44 4 4 Measuring Resistance by using 4 wire Mode 1 To measure resistance using 4 wire mode firstly connect two test leads from V O Hz and Sense Hi terminals to one side of the resistor under test and then connect the other two test leads from Lo and Sense Lo terminals to the other side of the resistor under test as shown below F x OFF RESISTANCE N WARNING Do not apply a voltage exceeding 250 V peak between Sense Hi and Sense Lo terminals and 500 V peak between V Q H7 and Lo input terminals Z 2 2 Fa ia to select 4 wire Q measurement function 4 W annunciator will be on in the primary display Jon E 2 Bi e A or to select auto ranging or manual range for primary display 45 4 5 Note Measuring True RMS AC DC The meter can measure the true rms value of ac voltages and currents When d and or e and pressed simultaneously the meter will measure the dc and ac signals alternatively then calculate and display the ac dc rms value by using the following formula actde RMS 4 de 4 ac When voltage ac dc measurement function is selected the Vdc input impedance is paralleled with an ac coupled 1 1M4 ac divider Measure
53. ce parameters within the meter to comply GPIB interface with the host The default settings of the meter at factory are address 8 and talk off Table 7 1 indicates the GPIB interface factory settings and user selectable communication parameters 69 Table 7 1 GPIB Interface Parameters Item Parameter Factory Setting Selectable Parameter 1 Address 8 0 to 30 2 Talk OFF ON or OFF 7 4 Commands Summary Note All commands must be entered in the upper case 7 4 1 Overview of Command Type and Formats There are two types of the meter programming commands IEEE 488 2 common commands and Standard Commands for Programmable Instruments SCPI The SCPI commands used in the meter are in conformance with the SCPI standard Version 1993 0 e Common Command Format The IEEE 488 2 standard defines the common commands as commands that perform functions like reset self test and status byte query Common commands always come with the asterisk character and may include parameters Some examples of Common commands like IDN RST CLS SRE e SCPI Command Format and Query Format The SCPI commands control instrument functions A subsystem command has a hierarchical structure that usually consists of a top level or root keyword one or more lower level keywords and parameters The following example shows a command and its associated query A CONFigure VOLTage DC 0 12 Set the primary display to t
54. ciator in secondary display oY display to select DC current measurement function for secondary Auto lt or to select auto ranging or manual range for 6 J 2 secondary display Off 2nd may turn off secondary display Note 1 Press SWt then Note 2 Regarding secondary display function setting please refer to Section 3 10 41 e Measuring AC voltage and frequency on an AC circuit To display AC voltage in primary display and the frequency in secondary display or vise versus while measuring an AC signal user may check AC voltage and its frequency of an AC Power Supply or circuit by taking a single measurement 1 Connect the meter to the unit under test as shown below 8 8 AC VOLTAGE SOURCE N 3 288 2 Z A UJ primary display Ly m DUAL DISPLAY MULTIMETER LIL Lt Lt Lt 2ND AUTO Y Setup Min Max Local Ref Q Rel Rel Va M Power a ON OFF to turn on 2ND annunciator in secondary display S CL s AHE display Auto lt 6 pu to select AC voltage measurement function for primary display A or toselect auto ranging or manual range for to select Frequency Hz measurement function for secondary secondar
55. curacy 1 year ate Range Resolution Reading Current 2 wire 4 wire 1200 1mQ 119 999 0 5mA 0 1 8 0 05 8 2 1 2kQ 10 1 19999 0 5mA 0 08 5 0 05 5 2 12kQ 100mQ 11 9999 100 0 06 5 2 0 05 5 S 120kQ 10 119 999 10 0 06 5 0 05 5 1 2MQ 100 1 19999 1uA 0 06 5 0 05 5 12MQ 1000 11 9999 100nA 0 3 5 0 3 5 120MQ 1kQ 119 999 10nA 3 0 8 3 0 8 4000 10mQ 399 99 0 5mA 0 1 5 2 0 05 4 5 2 4kQ 100ma 3 9999 100uA 0 08 3 2 0 05 3 40kQ 10 39 999 50A 0 06 3 0 05 3 M 400kQ 102 399 99 5uA 0 06 3 0 05 3 4 1000 3 9999 500nA 0 15 3 0 15 3 40MQ 1KQ 39 999 50nA 1 5 3 1 5 3 300MQ 10kQ 299 99 10nA 5 0 5 5 0 5 4000 100mQ 399 9 0 5mA 0 1 2 2 0 05 2 4kQ 10 3 999 100uA 0 08 2 0 05 2 40kQ 102 39 99 50pA 0 06 2 0 05 2 F 400 1000 399 9 5A 0 06 2 0 05 2 4 1kQ 3 999 500nA 0 15 2 0 15 2 40MQ 10kQ 39 99 50nA 1 5 2 1 5 2 300MQ 100k 299 9 10nA 5 0 2 5 0 2 1 In order to eliminate the noise interference which might be induced to the test leads it is recommended to use a shielded test cable for measuring resistance above 120KQ 2 Use relative REL modifier Open Circuit Voltage 5 0V dc e Zeroing error 0 050 or less excluding test lead resistances in each range when REL modifier is used e Response time Approximately 1 5 seconds for 12MQ and ranges below 12M O approximate
56. d Burden Voltage Rate Range Resolution Full Scale Reading e amp Shunt Resistor 12mA 0 1 11 9999 0 15V 100 120mA 1pA 119 999 1 5V 100 3 1200mA 10 1199 99 lt 0 3V 0 10 12A 100A 11 9999 lt 0 6V 0 010 40mA 1pA 39 999 0 5V 100 120mA 10 119 99 1 5V 100 1200mA 1004A 1199 9 lt 0 3V 0 10 12A 1mA 11 999 0 6V 0 010 40mA 104A 39 99 0 5V 100 E 120mA 100A 119 9 1 5V 100 1200mA 1mA 1199 lt 0 3V 0 10 12A 10mA 11 99 lt 0 6V 0 010 1 Typical at full scale reading and rms voltage across the input terminals Accuracy Anus Range Accuracy 1 year 20 to 45 Hz 45 to 2k Hz 2 to 10 kHz 12mA 1 5 100 0 5 100 2 200 120mA 1 5 100 0 5 100 2 200 1200mA 1 5 100 0 5 100 2 200 12A 2 100 1 2A 1 100 40mA 1 5 40 0 5 40 2 80 120mA 1 5 12 0 5 12 2 30 1200mA 1 5 12 0 5 12 2 30 12 2 12 lt 1 2 1 12 40 1 5 5 0 5 5 2 10 120mA 1 5 2 0 5 2 2 5 1200 1 5 2 0 5 2 2 5 12 2 2 lt 1 2 1 2 1 Specified accuracy at input gt 5 of full scale e Measurement method True RMS e Maximum Crest Factor 3 0 at full scale e Response Time Approximately 1 5 seconds when the displayed reading reaches 99 9 ac rms value of the tested input signal at the same range 97 e AC Current True RMS AC DC Coupling
57. d secondary display setting Example CONF CURR DC Set the primary display to DC current CONF CURR AC 0 12 2 Setthe secondary display to AC current 120mA range CONF CURR ACDC 1 Set the primary display to AC DC current CONFigure SCALar DIOCtest 78 Description Set the primary display to diode with continuity test CONFigure SCALar FREQuency lt numeric value 91 1 92 Description Set the primary and secondary display to frequency measurement function The numeric value parameter is used to configure the measurement range 1 1 2 has the same syntax as SCPI channel list syntax Use 1 to select the primary display function and 92 to select the secondary display function Parameter numeric value For frequency range 1200 1 2E 4 1 2E 5 1E 6 Hz 1 1 2 For the primary and secondary display setting Example CONF FREQ 1 2E 4 Set the primary display to frequency 12KHz range CONF FREQ 1200 Set the secondary display to frequency 1200Hz range CONFigure SCALar RESistance 2W xnumeric value gt iW xnumeric value Description Set the primary display to 2 wire or 4 wire resistance measurement function The numeric value parameter is used to configure the measurement range Parameter numeric value For resistance range 120 400 1200 4000 1 2E 4 4E 4 1 2E 5 4E 5 1 2E 6 4E 6 1 2E 7 4E 7 1 2E 8 3E 8 Example 1 2E 4 Set the pri
58. e CMRR gt 90dB for dc signal e Response Time Same as ac voltage and ac current measurements 115 B 3 General Specifications General Items Specifications Warm up time At least 30 minutes Temperature Coefficient Add 0 15 x the applicable accuracy C at 0 C to 18 C and 28 C to 50 C Operating Temperature 0 C to 50 C 32 F to 122 F Storage Temperature 20 C to 60 C Altitude Up to 2000 M Pollution Degree Over voltage Category CAT 1I 600V and CAT 1 1000V Relative Humidity e Up to 80 for 0 C to 28 C 75 RH for 12M and above ranges of resistance measurement e Up to 70 for 28 C to 35 C Up to 50 for 35 C to 50 C Common Mode Voltage 1000V dc or peak ac rms maximum between any input and earth ground Dimension Approx 255 w x 105 h x 305 d mm with holsters Weight 3 0kgs Line Voltage 100V 120V 220V 240V ac 10 50 60Hz 16VA maximum Interface RS 232 DB 9 male connector e Baud rates 9600 4800 2400 1200 600 300 e Data length 7 or 8 bits e Parity even odd none e Stop bit 1 or 2 bits e Echo on off e Print mode on off Safety Requirement Designed in compliance with EN61010 1 IEC1010 1 Installation Category 750VAC 1000VDC or CAT II 600V Pollution Degree 2 Environment EMC Requirement Designed in compliance with EN61326 1 116 Appendix
59. e the handle adjust it to the vertical stop position and pull the ends all the way out 1 Viewing Position 1 4 Viewing Position 2 1 b a Hi 2 E gt K oe cj J N Li gt J L Sy J 2 Carrying Position n T Th c E 5 Viewing Position a 1 Li 15 LL i sy nt Pu v 3 Remove Handle Position f U T TA Cm Figure 2 3 Adjusting Handle 2 3 Turning the Meter ON To turn the meter on press the Power button to IN position located on the lower right of the front panel When the meter is turned on the primary and secondary displays light for about 2 seconds while an internal self test running by its digital circuitry If the button is pressed while the power up sequence is in progress all segments and annunciators of the entire display remain on until another button is pressed Then the power up sequence continues After the meter completing its power up sequence it resumes the power up measurement configuration stored in non volatile memory The power up default configuration status set at factory is shown in Table 3 2 2 4 Selecting Current Input Terminals and Measurement Range If current dc or ac is being measured in the Auto ranging mode with a signal input on the 1200mA terminal 5492 or 120mA terminal 5491 the meter will select the range automatically
60. either measurement speed or noise rejection which affects accuracy see Table 3 5 The annunciators and slow medium and fast respectively indicates selected rate on the primary display e then ve to select the different reading rate of measurement The meter will be operated in one of the three reading rates sequentially S gt M gt F gt S gt M if user repeats the above procedures once after the other Table 3 5 Display Reading Rates for Single Function Measurements Reading Rate Digits Display Counts 1 2 Readings per Second SLOW 5 1 2 119 999 2 MEDIUM 4 1 2 39 999 5 FAST 3 1 2 3 999 20 In Vdc 1000V range display counts will be limited up to 1200 00 1200 0 and 1200 for slow medium and fast reading rate respectively 2 In Vac 750V range 1000Vrms is readable Note 1 The reading rate is not selectable when using Frequency function Note 2 At dBm function enable 0 01dBm resolution for Slow or Medium rate and 0 1dBm for Fast rate 3 9 Selecting Secondary Display e Enable the Secondary Display Mode Zi els then function buttons 5 and to enable the secondary display mode The 2nd annunciator is in the secondary display area e To Disable the Secondary Display Mode on Off 2 then 2 to disable the secondary display mode
61. el Description Power Cord TL 36 Test Leads Red and Black AC 01 Cap for TL 36 2pcs 481 408 9 001 Operation manual 198 304 9 001 Fuse 2A 250V Fast Blow 6 x 31mm For 5492 only 198 305 9 001 Fuse 250mA 250V Fast Blow 6 x 31mm For 5491 only Optional Accessories Model Description RS232 cable AK 5491 PC Link software TL 35 Test leads Red and Black AC 02 Lantern tip extension probe for TL 35 KC 01 4 Wires test cable set with Kelvin clips Alligator clip Red AC 03 d k Alligator clip Black RK 01 Rack mount kit for single meter TH 02 Insulation piercing clip 198 306 9 001 Fuse 15A 500V Fast Blow 10 3 x 38 1mm 118
62. equency response 39 4 2 1 Dual Display Operation Examples This section will describe some practical operations of using dual display features e Measuring DC voltage and AC ripple on a rectification circuit To display DC voltage in primary display and AC voltage in secondary display or vise versus while testing a rectifier circuit user may check the DC voltage supplied and its AC ripples by taking a single measurement 1 Connect the meter to the unit under test as shown below f TN DUAL DISPLAY MULTIMETER 94 5 f NOICC r1 1 1 L1 uH 2 b dw I LI L I mv 2ND Iu Foy OY Rae sep Power 697 m Hz A un Local Shift aa C L Ji ON OFF peac 7 dim Com lo Ref f 2 A a uf 8 Re 2nd F 6 8 usce MW Y AZ DC AC VOLTAGE SOURCE p fees O AA f zv Do 7 to select DC voltage measurement function for primary display A or toselect auto ranging or manual range for a primary display 5 f 2nd g 4 to turn on 2ND annunciator in secondary display 3 i to select AC voltage measurement function for secondary display A or to select auto ranging or manual range for
63. es 99 9 frequency value of the tested input signal at the same range 114 e dBm decibel calculation Reference Impedance 20 2 500 1350 8000 40 2 750 1500 9000 ao 930 2500 10000 160 2 1100 3000 12000 1240 5000 80000 1250 6000 Reference impedance is displayed on the secondary display 2 Reading displayed in watts Audio Power 3 Default reference impedance Range and Accuracy Voltage dBm 3 Range 1 2 Input Voltage 40 to 50 to 5 to Range 6000 Ref 50 Hz 5k Hz 30 kHz 120mV 6mV 120mV 42 20 16 20 1 0 1 0 1 0 1 2V 120mV 1 2V 16 20 3 80 0 8 0 6 0 8 12V 1 2V 12V 3 80 23 80 0 8 0 6 0 8 120V 12V 120V 23 80 43 80 0 8 0 6 0 8 1000V dc 120V 1000V 43 80 62 22 19 9 750V 120V 750V 43 80 59 72 400mV 20mV 400mV 31 76 5 74 1 0 1 0 1 0 4V 400mV 4V 5 74 14 26 0 8 0 6 0 8 40V 4V 40V 14 26 34 26 0 8 0 6 0 8 ME 400V 40V 400V 34 26 54 26 0 8 0 6 0 8 1000V dc 400V 1000V 54 26 62 22 19 9 750V ac 400V 750V 54 26 59 72 1 Auto ranging is used when dBm function is selected 2 in Vac 750V range 5 over range is readable 3 Reading displayed in dB when REL modifier is used 0 For input voltage at frequency between 45Hz to 1kHz e 0dBm 1 mW 6000 Reference Impedance e Resolution 0 01dB at slow and medium rate 0 1dB at fast rate for all ranges
64. g ranges and x for specifying reading rate f is a necessary parameter for specifying the measurement functions f parameter is defined by a numeric value from 0 to 9 and character A r is an optional parameter for specifying measurement range lt r gt parameter is defined by a numeric value from 0 to 7 If lt r gt parameter is omitted x parameter should be omitted too The meter will be set at auto ranging X is an optional parameter for specifying a reading rate It is defined by a character S or F in which S is for slow rate for medium rate and F for fast rate If x parameter is not specified the meter will remain on its current reading rate without change Table 6 6 shows all available S1 command parameters and available combinations Example 1 S104S lt f gt r and x are all specified Set primary display of the meter to DCV 120V with manual range and at slow reading rate Example 2 S142 x is omitted Set primary display to DCA 120mA with manual range and the reading rate will not be affected Example 3 S17 Both r and x are omitted Set primary display to frequency with auto ranging and the reading rate will not be affected 54 Table 6 5 Descriptions for S2 Command Command Description S2 f r x In S2 command lt f gt
65. git hex number each digit contains 4 bit binary codes Bit 7 4 and Bit 3 0 respectively to represent eight types of status about the meter lt 91 gt indicates the status for four types of meter operation go indicates the ON OFF status for other four types of meter operation Example If lt h h2 gt contains a character string 18 convert it to an 8 bit binary code 00011000 that means the meter is under Auto ranging for Primary Display 1 Auto Ranging and the reading is on hold lt 9192 gt Status 0 1 7 CAL Mode off on 6 2nd Function off on 79 5 Shift Key off on 4 Hold Reading off on 3 1 Auto Ranging off on 2 2 Auto Ranging off on 1 MIN Recording off on 0 MAX Recording off on Vv v is a single numeric numbers 0 1 2 or 3 used for representing the intensity level of VFD display on the meter lt v gt 0 1 2 3 Intensity Level 50 60 75 100 x Xx indicates the status of reading rate of the meter This character may contain one of three different characters S M or F in which S represents for slow rate M for medium rate and F for fast rate fir fj indicates the measurement function in primary display It contains and numeric value from 0 to 9 and character A fjr r1 is primary display measurement range The value is from 1 to 7 Please refer to Table 6 11 for an available value f and lt r gt are simila
66. he DC voltage measurement function and select the 120mV range B CONFigure RANGe Return the range of the primary display measurement CONFigure is a root level keyword with the second level keyword VOL Tage and 0 12 is the command parameter The query command ends with a question mark 70 Note SCPI stems from IEEE488 1 and IEEE 488 2 Although the IEEE 488 2 standard addressed some instrument measurements it principally dealt with common commands and syntax or data formats Please refer to the IEEE488 2 and SCPI reference manual for more information 7 4 2 Response Message Data Types Response messages are data from the meter to a computer in response to a query A query is a command followed by a question mark Table 7 2 contains explanations of data types Table 7 2 Response Message Data Types Data Type Explanations Examples 100000 10000 NRI An integer 123 100 NES This numeric representation has an explicit radix 13 23455 00002 gt point 3 45678 NR This representation has an explicit radix point and 1 2E 2 0 1E 0 lt gt an exponent 0 12E 3 9E 9 Accepts lt NR1 gt lt NR2 gt and lt NR3 gt data types Po Flexible numeric representation lt NRf gt NER 100 255 16 only positive integers A single ASCII encoded byte is return for the O or 1 OFF or ON Boolean settings query T ASCII encoded bytes corresponding to the short SLOW MID I
67. he correct fuse ratings 250mA fuse for 100Vac or 120Vac is selected and 125mA fuse for 220Vac or 240Vac is selected e Case Panels and Holsters To avoid electric shock or injury do not operate the meter without panels or case in place The meter is provided with special designed anti slippery protective holsters on the front and rear panel sides shown in Figure 2 1 and 2 2 The holsters provide a protection to both front and rear panels of the meter as well as its corners User may stack up one meter on the top of the other without concerning the slide off of the units shown in Picture 2 1 The holsters can be easily removed when install the rack mounted ears to the meter in order to mount the meter into a 19 inch standard rack Refer to Section 2 7 for Rack Mounting procedures Picture 2 1 Stack up the Meters with Holsters e Grounding the Meter The meter is grounded through power cord To avoid electric shock or injury grounding wire in the power line cord must be connected e Operating in Explosive Atmospheres The meter does not provide explosion protection for explosive gasses or arcing components Do not operate the meter in such circumstances e Adjusting Handle For bench top use the handle can be adjusted to provide three viewing angles For viewing positions pull the ends out to a hard stop about 1 4 inch on each side and rotate it to one of four stop positions shown in Figure 2 3 To remov
68. id tkecho char char tkdata char int scan key void int err void main void char buffer 35 clrscr init 152320 printf Initial RS232 n send buffer RSTV15In tkecho gt 015 n tkecho gt 015 n send_buffer S101 015 n tkecho 1015n send buffer S21110151n tkecho 1015n sleep 3 send_buffer R1 015 n printf s tkdata buffer thecho gt 015 n send_buffer R2 015 n printf s tkdata buffer tkecho gt 015 n getch h Clear screen Initial RS232 interface Print Initial RS232 on screen Send RST to meter l Waiting gt and checking if the command is executed successfully Waiting gt to make sure the meter is in power on initial state Send S101 to meter Waiting gt and checking if the command is executed successfully Send S101 to meter Waiting gt and checking if the command is executed successfully Wait for 3 seconds Send 1 to meter Read primary display reading Print primary display reading on computer screen Waiting gt and checking if the command is executed successfully Send R2 to meter Read primary reading Print secondary display reading on computer screen Waiting gt and checking if the command is executed successfully printf Press any key to continue Wait for a key 65 void in
69. ing operations can be performed from the front panel e Select a measurement function Vdc Vac Adc Aac resistance frequency and diode continuity test for the primary and secondary display e Take a measurement and display a reading e Select the manual or auto range mode AUTO e Manually select a measurement range for the primary display e Select function modifier that cause the meter to display relative readings REL minimum or maximum values MIN MAX or decibels dBm and dB or to enter the Data Hold mode HOLD to hold a reading on the primary display e Change the measurement rate SLOW MEDIUM FAST e Set the dB reference impedance e Take a measurement and compare COMP it against a tolerance range Hi Lo or Pass Use the editor to select from option list to enter a relative constant base or to enter a HI LO range for the compare COMP mode e Configure the computer interface RS 232 or IEEE 488 e Take an audio power reading e Send measurement directly to a printer or terminal through the RS 232 interface RS 232 print only mode These and other front panel operations are described in the remainder of Section 3 3 3 Primary and Secondary Displays The meter has a 5 1 2 digit Vacuum Fluorescent dual display This display shows measurement readings annunciator and messages The annunciator indicates measurement units and the meter s operating configuration The dual display allow
70. it_rs232 void outporthb RS232 3 0x80 outportb RS2321 0x00 outporth RS232 0x0c outporth RS232 3 0x03 outporthb RS232 4 0x03 outportb RS2321 0x00 void send_buffer char buffer unsigned int i for i 0 i lt 20 i send buffer i putchar buffer i if buffer i n break void tkecho char buffer unsigned int i 0 while 1 if buffer i read putchar buffer i if buffer i n break itt char tkdata char buffer unsigned int i 0 while 1 buffer i read break iH buffer i 0 return buffer j void send char p unsigned int retry 0 Enable DLAB 600bps 115200bps 9600bps 8N1 INER Send a string to RS 232 Wait for a specific string Get a string from RS232 and return the decimal point position if 00120 amp amp buffer iJ n i gt 30 if buffer i gt 33 amp amp buffer i 126 66 err l while retry lt 10000 if 0x20 amp inporth RS232 5 outportb RS232 p err 0 break char read void unsigned int retry 0 err l while retry lt 30000 if 0x01 amp inporth RS232 5 err 0 break return inportb RS232 j 67 This page is subject to be blank 68 Section 7 GPIB Remote Operation Option 7 1 Introduction This section describes how to operate the meter via GPIB inte
71. ium 119 999 39 999 3 999 Reading Rates on Single Display Readings Sec Measurement Functions Slow Medium Fast DCV 2 5 20 DCA 2 5 20 Diode 2 5 20 ACV 2 4 2 20 ACA 2 4 2 20 2 wires 2 4 17 4 wires 4MQ 1 2MQ range and below 0 6 0 8 0 9 4 wires 12MQ range and above 1 4 1 7 1 9 Frequency 1 2 1 7 2 4 ACV DCV 0 4 0 5 0 7 ACA DCA 0 4 0 5 0 7 104 Reading Rates on Dual Display Readings Sec Measurement Functions Slow Medium Fast DCV ACV 0 7 1 0 1 9 DCA ACA 0 7 1 0 1 9 DCV DCA 0 7 1 0 1 9 DCV ACA 0 2 0 2 0 5 ACV ACA 0 2 0 2 0 5 ACV 0 7 1 0 1 9 ACV Frequency 0 5 0 7 1 1 Frequency 0 6 0 8 1 3 ACV DCV DCV 0 5 0 6 0 9 ACA DCA DCV 0 1 0 2 0 4 ACA DCA ACV 0 1 0 2 0 4 ACA DCA DCA 0 5 0 6 0 9 dBm ACV Reference Q 2 1 4 2 11 9 dBm ACV ACV 0 7 1 0 1 7 dBm ACV DCV 0 6 1 0 1 7 dBm ACV Frequency 0 7 1 0 1 7 Note1 Above table shows some common combinations and applications of using dual display Note2 Using RS 232 or GPIB remote interface the reading rate approximates to normal mode 105 e DC Voltage Resolution Full Scale Reading and Accuracy 1 Full Scale Accuracy Typical Input Rate Range Resolution Reading year 4 120mV 1uV 119 999 0 02 8 10 0MQ 1 2V 10uV 1 19999 0 02 5 10 0MQ S 12V 100uV 11 9999 0 02 5 111M2 120V 1mV 119 999 0 02 5 10 1MQ 1000V 10m
72. lected the display indicates the latest maximum reading until next measurement reading exceeds the previous recorded reading If MIN modifier is selected the display indicates the latest minimum reading until next measurement reading drops below the previous recorded reading If MINMAX mode is selected the display indicates the actual value of input signal 31 Note 1 When MINMAX dynamic recording mode is selected the measurement range will be changed to the manual range and will be locked on the current measurement range until the MINMAX mode is disabled and user selects other ranges or auto ranging mode is enabled Note 2 If the beep mode is set to ON the beeper will emit a single tone when an effective maximum or minimum value is recorded Operation Procedures Z Pa max to enable MINMAX modifier The recording mode will rotate as the following sequences if keep pressing the key gt MinMax gt Min gt MinMax gt fered Off then disable MINMAX modifier e Operation Example ON shit 2 Ly Po 4 Selecting HOLD Data Hold Modifier The Data Hold function allows user to freeze the display This feature is useful when user wants to keep the current measurement reading user may press HOLD to freeze the display and then
73. ly 5 seconds for 40MQ range approximately 10 seconds for 120MQ approximately 25 seconds for 300MQ range e Maximum Input Protection 500V dc or ac rms 99 e Diode Test Continuity Rate Maximum Reading Resolution S 1 19999V 10uV M 2 4999V 100uV F 2 499V 1mV Open Circuit Voltage lt 5 0V dc e Test Current Approximately 0 5mA dc e Audible Tone Continuous beep for continuity and single tone for normal forward biased diode or semiconductor junction e Continuity level Approximately below 50mVdc e Maximum Input Protection 500V dc or ac rms e Resistance Continuity 2 wire Rate Range Resolution Maximum Reading Accuracy S 1200 1 119 999 0 1 8 7 M 4000 10mQ 399 99 0 1 5 F 4000 100mQ 399 9 0 1 2 Use relative REL modifier Open Circuit Voltage lt 5 0V dc e Test Current Approximately 0 5mA dc e Audible Tone Continuous beep for reading is less than 100 e Zeroing error 0 050 or less excluding test lead resistances in each range when REL modifier is used e Maximum Input Protection 500V dc or ac rms 100 e Frequency Resolution Full Scale Reading and Accuracy Range Measurement Resolution Full Scale Accuracy Input Sensitivity Hz Range Hz Hz Reading 1 year 1 Sine wave 1200 5 to1200 1199 99 0 005 3 12k 10 to 12k 11 9999 0 005 2 40mV rms 120k 100 to 120k 119 999 0 005 2 02 1 to 1M 10 1
74. mary display to resistance 12kQ range CONFigure SCALar FUNCtion 1 2 Description Return the measurement function Use 1 to select the primary display function and 2 to select the secondary display function Response lt literal gt format Return the type string DCV DC voltage function ACV AC voltage function AC DCV AC DC volts coupling mode DCA DC current function ACA AC current function AC DCA AC DC volts coupling mode Hz Frequency function RES2W Resistance 2 wire function 9 RESAW Resistance 4 wire function 10 DIOC Diode with Continuity test 11 NONE No function only for secondary display OND tn FW NY 79 CONFigure SCALar OFFDual Description Turn off the secondary display CONFigure SCALar OFFRecord Description Exit the dynamic recording mode MAX MIN CONFigure SCALar RANGe AUTO Boolean 1 2 Description Enable or disable the auto range mode Parameter Boolean On 1 off 0 CONFigure SCALar RANGe AUTO 1 1 2 Description This queries return the auto range status Response 1 enable or O disable CONFigure SCALar RANGe DIRection UPIDOWN 1 1 2 Description Change measurement range increases it by one step Parameter lt UP gt increases it by one step lt DOWN gt decreases it by one step CONFigure SCALar RANGe 91 1 92 Description Return the meas
75. ment example To take a true rms voltage ac dc measurement on an ac signal assuming the input is 10Vims 1kHz sine wave ac signal and with a dc offset voltage 5 volts the meter will read and display the results approximately as 1 52 102 11 1803 volts 46 Section 5 Calibrating the Meter 5 1 Introduction N CAUTION TO AVOID DAMAGING THE DEFAULT CALIBRATION DATA STORED IN A NON VOLATILE MEMORY A CALIBRATION TO THE METER CAN ONLY BE DONE BY AN AUTHORIZED SERVICE CENTER AND QUALIFIED PERSONNEL WITH APPROPRIATE EQUIPMENT THE WARRANTY WILL BE EXPIRED IF THE SEALED LABEL ON THE CAL BUTTON OF THE FRONT PANEL IS BROKEN FORE DETAIL INFORMATION ABOUT CALIBRATION PROCEDURES PLEASE CONTACT FACTORY OR AUTHORIZED DISTRIBUTOR It is recommended to recalibrate and verify the meter at least once a year to ensure it meets the original designed performance and specifications The meter is designed with closed case calibration capability no internal adjustment To enter calibration mode by pressing the CAL button located in the hole on the upper right position of the front panel display screen The meter can be calibrated and verified by keystrokes via the front panel or through RS 232 interface or optional IEEE 488 command with appropriate equipment and qualified personnel only 5 2 Environmental Condition Calibration or verification test should be performed under laboratory condition with an ambient temper
76. n error message CALL ibdev 0 1 0 T10s 1 0 dvm IF dvm lt 0 THEN CALL gpiberr Ibdev Error Clear the internal or device functions of the meter If the error bit EERR is set in IBSTA call GPIBERR with an error message CALL ibcir dvm IF ibsta AND EERR THEN CALL gpiberr Ibclr Error Reset the meter by issuing the reset RST command Instruct the meter to measure the volts alternating current VAC using auto ranging AUTO If the error bit EERR is set in IBSTA call GPIBERR with an error message wrt RST CALL ibwrt dvm 6 wrt IF ibsta AND EERR THEN CALL gpiberr Ibwrt Error wrt CONF VOLT AC CALL ibwrt dvm 6 wrt IF ibsta AND EERR THEN CALL gpiberr Ibwrt Error Initialize the accumulator of the 10 measurements to zero sum 0 Establish FOR loop to read the 10 measurements The variable i will serve as a counter for the FOR loop FOR i 1 TO 10 Request the measurement by sending the instruction READ Ifthe error bit EERR is set in IBSTA call GPIBERR with an error message wrt READ CALL ibwrt dvm wrt IF ibsta AND EERR THEN CALL gpiberr Ibwrt Error Read the meter measurement If the error bit EERR is set in IBSTA 6 call GPIBERR with an error message rd SPACE 11 CALL ibrd dvm rd IF ibsta AND EERR THEN CALL gpiberr Ibrd Error Remove blank spaces in RD and assign resulting buffer to READINGS Print measurement
77. nable Register SRE The Service Request Enable Register that enables or disables i e masks corresponding summary messages in the Status Byte Register The SRE is cleared at power up Refer to Status Byte Register for the bit functions Use SRE to write to this register and SRE to read this register e Standard Event Status Register ESR PON PON CME EXE DDE QYE OPC CME DDE owe o Bit 0 OPC Operation complete This bit is generated in response to the OPC command and indicates that the interface is ready to accept another message Bit 1 is not used Always set to 0 Bit 2 QYE Query Error Attempt has been made to read the Output Queue when no output is present or pending Or both input and output buffer are full Bit 3 DDE Device Dependent Error Incorrect input during calibration or RS 232 input buffer overflow Bit 4 EXE Execution Error Parameter is wrong or unknown Bit 5 CME Command Error Command is wrong or unknown Bit 6 is not used Always set to 0 Bit 7 PON Power On Power has been cycled off and on since the last time the ESR was read Note 1 The Standard Event Status Register can be read by the ESR query 2 The register is cleared at power up or use ESR and CLS commands 73 e Standard Event Status Enable Register ESE The Standard Event Status Enable Register is a mask register that allows the host to enable or disable mask
78. nce The allowed value are 2 4 8 16 50 75 93 110 124 125 135 150 250 300 500 600 800 900 1000 1200 8000 ohm Example CALC DBM IMP 1000 Set the dBm impedance value to 10000 CALCulate RELative STAT Boolean Description Enable or disable the relative REL calculation mode When meter enters the relative mode auto ranging is disabled and using the primary display reading as the relative base Parameter Boolean On 1 off 0 CALCulate RELative BASE numeric value Description Meter enters the relative calculation mode Auto ranging is disabled Parameter numeric value is a six digit number Relative base 199999 to 199999 Example CALC REL BASE 123456 Set the relative base to 123456 Notes The least setting digit is blank on the display of meter for fast mode To set least setting digit to 0 for fast mode as necessary CALCulate LIMit STAT Boolean Description Enable or disable the comparator mode Parameter Boolean On 1 off 0 82 CALCulate LIMit UPPer DATA numeric value LOWer DATA numeric value Description Set the compare limits values upper and lower limit value Parameter numeric value is a six digit number For value range 199999 to 4 199999 Example CALC UPP 123456 Set the upper limit value to 123456 CALC LOW 123456 Set the lower limit value to 123456 Notes The least setting digit is blank on the display
79. nd clears the register Response Integer Decimal equivalent of the register byte Example ESR Return 32 if bit 5 CME is set 1 and the rest of the bits are reset 0 IDN Description Query the Meter identification Response Return the following information Model and Firmware version OPC Description Set the Operation Complete bit in the Standard Event Status Register when all pending device operations are complete 75 OPC Description This command pauses program execution until all operations are completed Response Return a 1 after all pending operations are complete RST Description Place the meter in its power on reset state This command does not affect 1 the Service Register Enable or the Standard Event Status Enable 2 the Output Queue and interface parameter SRE lt NRf gt Description Set the Service Request Enable Register bits Parameter NRf 0 to 255 The value of bit 6 and unused bits are ignored when set the register Example SRE 56 Enable bits 3 QUES 4 and 5 ESB in the Service Request Enable register SRE Description Query the Service Request Enable Query Register Response Integer Decimal equivalent of the register byte Return value is 0 to 252 STB Description Query the Status Byte Register Response Integer Decimal equivalent of the register byte Example STB Return 96 if bit 4 and 6
80. ng Rate Range Seale Auto angina v woman __ _ Miu 0 vA ums mens 00m o oeae eO _ awa awa 200m __ w OO 1 4200mA for 5492 only 2 10A dc or ac rms continuous 12A dc or ac rms for 30 seconds maximum 3 In order to eliminate the noise interference which might be induced to the test leads it is recommended to use a shielded test cable for measuring resistance above 120KQ More operations of selecting a measurement function are described below Z N P 4 to select DC voltage measurement P 4 to select AC voltage measurement PP e J 7 to select DC current measurement VA to select AC current measurement 2 e Z N to select frequency measurement AN dBm e y to select Diode or Continuity measurements by toggling the key SO f PA waw to toggle in and out of the 2W 4W resistance measurements mode dBm 5 Shift then to select dBm calculation and simultaneously to select DC AC RMS volts calculation e 2 A and ind simultaneously to select DC AC RMS amps calculation 23 3 7 Selecting Measurement Range and v X a Ranging operations are performed by using the and Iv butto
81. ns see Figure 3 3 Measurement ranges can be selected automatically by the meter in Auto ranging or manually operated by the user e Auto Ranging 5 to toggle in out of manual ranging When meter is in auto range mode the AUTO annunciator is lit In auto range the meter selects the next higher range automatically when a reading is greater than full scale If no higher range is available OL overload will be displayed on primary or secondary display Likewise the meter will automatically selects a lower range when a reading is less than approximately 9 5 of the full scale e Manual Range Press to toggle in and out of manual ranging The range user is in will become the selected range when user enters the manual range mode In manual range the meter remains in the selected range regardless of input Press to toggle back to auto ranging Manual range can be performed either on readings shown in the primary display or secondary display e Selecting AMeasurement Range To manually select a range to toggle in and out of the manual ran ing mode or 88g 8 and In manual range mode v to select higher range or lower range to the desired one 24 3 8 Selecting Measurement Rate Rate The meter takes measurements at one of three user selectable rates SLOW MEDIUM and FAST Rate selection allows user to maximize
82. o With echo ON the meter echoes returns all the characters whatever it receives e Terminator A terminator is a character sent by a host which identifies the end of a command string In RS 232 applications a valid terminator consists of two byte data CR Carriage Return and lt LF gt Line Feed e Prompts When a host sends a command string to the meter through RS 232 interface the meter executes the command and returns one of the prompts as shown on Table 6 2 Table 6 2 RS 232 Return Prompts The meter is reset to power up initialisation status Prompts e Return result After the meter executes a query command the return of the result will be in the following format RESULT CR lt LF gt lt PROMPT gt lt CR gt lt LF gt 52 If RS 232 of the meter is under print only mode the meter will print out the measured data when the measurement cycle is completed The format of printed data will be shown as one of the following 1 Measurement Data CR lt LF gt for only primary display mode is enabled or 2 lt Measurement Data 1 gt lt Measurement Data 2 gt lt CR gt lt LF gt for both primary display and secondary display mode are enabled 6 5 Instructions of Command Sets 6 5 1 Key Commands Table 6 3 Descriptions for Key Commands
83. of meter for fast mode To set least setting digit to 0 for fast mode as necessary CALCulate LIMit FAIL Description Return the compare result Response 1 0 PASS 1 LO CALCulate RECord MAXimum MINimum Description Set the dynamic recording mode The dynamic recording mode causes the meter to store the minimum and maximum readings Example CALC REC MAX Set meter to maximum recording mode CALC REC MIN Set the meter to minimum recording mode e READing Subsystem READ 1 1 2 Description Return the display value of output buffer after the next triggered measurement is complete Use 1 to select the primary display and 2 to select the secondary display Response Numeric data transferred as ASCII byte in NR3 format Example READ Return the value shown on the primary display For example might output 12 3456E 0 READ Description Return both display values of output buffer after the next triggered measurement is complete Response Numeric data transferred as ASCII byte in lt NR3 gt lt NR3 gt format Example READ For example might output 1 23456E 0 12 34566E 0 83 e SYSTem Subsystem SCPI approved SYSTem VERSion Description Return the firmware version of the meter SYSTem ERRor Description Return the next message from the system error queue Response lt string gt format Table 7 5 is a list of SCPI error message
84. play reading is 110 234 when the meter executes command R2 command After executing R2 command the meter will return the current readings in its secondary display For example a returned character string 3 0000 0 representing the primary display reading is 3 0000 when the meter executes R2 command If the meter is operating under primary display mode it will return a character gt RALL command RALL command is a combination of RO R1 and R2 The meter will return the meter status primary display readings and secondary display readings in sequence For information regarding R0 R1 and R2 please see Table 6 11 and Table 6 12 RST command RST command can reset the meter to its power up initialization status without shutting down the line power It is useful to refresh the meter in warm start RV command RV command is used to read the firmware version and model type of the meter 5492 or 549 The syntax of returned character string is specified by lt Vx xx gt lt m gt It contains two parts of character string separated by a comma in between lt Vx xx gt represents the current firmware version and lt m gt represents the model name lt m gt 6 for 5492 m 5 for 5491 For example a returned character string V1 00 5 represents 5491 installed with firmware version V 1 00 62 6 6 Remote Program Examples using RS 232 interface e Example Using Quick BASIC DECLARE
85. r to f and r but representing the secondary display status instead If the meter is operated under single display mode f and r2 will not be returned For detail information of interpreting the lt f gt lt r gt and lt f2 gt lt r2 gt please refer to Table 6 12 60 Table 6 12 lt f gt lt r gt and f2z r Response for RO Command 1 TE Pa E Range unction ESES MZOS Sow Rate Med Rate Fast Rate 1 120mV 400mV 2 1 2V 4V Vdc 3 12V 40V 4 120V 400V 5 1000V 1000V 1 120mV 400mV 2 1 2V 4V Vac 3 12V 40V 4 120V 400V 5 750V 750V 1 1200 4000 Q 2 wire 2 2 1 2kQ 4kQ 3 12kQ 40kQ N A 4 120kQ 400kQ 5 1 2MQ 4MO O 4 wire 3 6 12MO 40MQ 7 120MQ 300MO Ade 1 12mA 40mA 2 120mA 120mA 3 1 2 2 1 2 2 4 12 12 6 N A 1 1 2V 2 5V 1 1200Hz 1200Hz T 2 12kHz 12kHz 3 120kHz 120kHz 4 1MHz 1MHz 1 120mV 400mV 2 1 2V 4V V ac dc 8 N A 3 12V 40V 4 120V 400V 5 750V 750V 1 12mA 40mA 1 2 120mA 120mA A ac dc 9 N A 3 4 24 0 IAA 4 12A 12A 1 1200 4000 2 1 2KQ 4kQ Continuity 1 1260 acko Ol2 wire A N A 4 120kQ 400kQ 5 1 2MQ 4MO 6 12MO 40MQ 7 120MQ 300MO Not Applicable 2 For 5492 only 61 R1 command After executing R1 command the meter will return the current readings in its primary display For example a returned character string 110 234E 0 represents the primary dis
86. rface It also explains the detail information of all IEEE 488 2 command sets and Standard Commands for Programmable Instruments SCPI used in the meter The remote control operation enables the user either to manually operate the meter via a terminal or executes a host computer program automatically 7 2 Description of the GPIB The GPIB is a bus structure that links the meter to desktop computers and others GPIB controlled instruments to form an automated measurement system GPIB can connect up to 15 devices on one contiguous bus star or linear bus network Total transmission path length is 2 meters times number of devices whichever is less with a maximum of 3 meters separating any two devices Asynchronous 8 bits parallel data transfer using a 3 wire handshake One megabyte per second maximum over limited distances actual data rate depends upon the capability of the slowest device involved in the transmission 7 3 GPIB Interface Parameters Set up With the optional GPIB IEEE 488 interface installed the meter is fully programmable for used on the IEEE 488 1 interface bus 1978 The meter is also designed to comply with the supplemental standard IEEE 488 2 1987 In order to operate the meter via a host computer or terminal the parameters in GPIB interface within the meter has to match the parameters in the bus interface provided by the host or terminal The following procedures will guide the user to set up GPIB interfa
87. rimary Display indications Secondary Display indications Reading rate S M F Auto range AUTO Data Hold mode HOLD Dynamic recording MIN MAX Relative mode REL dBm indicator dBm 2wire 4 wire Q 4 2W Diode Continuity mode Primary Numeric data display 10 Measurement unit 11 2 Numeric data display 12 Measurement unit 13 2ND function enabling 2ND 14 Auto range AUTO 15 Remote state REMOTE 16 Compare function COMP 17 Shift mode S 18 Calibration mode CAL Figure 3 1 Dual Display Illustrations 3 4 Input Terminals The input terminals shown in Figure 3 2 are located on the left side of the front panel The meter is protected against overloads up to the limits shown in Table 3 1 Exceeding these limits poses a hazard to both the meter and operator Ohm 4W Sense High Terminal Input High Terminal for Volts Ohms Hz Diode Continuity Measurements 12mA 1200mA Range DC AC Current Input and Ohm 4W Sense Low Terminal Input Low and Common Terminal COM 12A Range Current Input Terminal for 12A Range DC AC Current Measurement 12mA 120mA 1200mA mA Fuse amp Holder 2A for 5492 250mA for 5491 Figure 3 2 Input Terminals Table 3 1 Input Protection Limits Input Terminal Maximum Allowable Input V Hz Hi to Lo 1000V dc 750V ac rms 1100V peak 2x1 0 V Hz V Q Hz Hi to Lo normal mode or 1x10 V Hz common mode 1
88. rimary display More detail operations are described in Section 3 2 6 Basic Measurement Examples This section describes the basic measurement procedures via operations in front panel These procedures as follows provide the user who wants to get a quick start but does not want to read the entire manual thoroughly But it is still recommended to read this manual thoroughly in order to fully utilize all advantages in the meter e Voltage Resistance or Frequency Measurements Press the desired function button and connect the test leads TL 36 or TL 35 as described in Section 1 3 as shown in Figure 2 5 to measure voltage resistance or frequency The meter will select the appropriate range in the auto range mode and an annunciator on the display will indicate measurement units NOTE Excessive error may occur when making measurements with I to 10 uV resolutions after measuring high voltage up to 1000 volts dc It requires two minutes before making low level measurements e Current Measurements To measure current connect the test leads to mA input terminal or 12A input terminal for measured current above 1200mA 5492 120mA 5491 as shown in Figure 2 6 Be sure to turn off the power in the circuit to be measured before taking current measurement Break the circuit on the groundside to minimize the common mode voltage to be measured and place the meter in series at that point Turn on power to the circuit
89. s then 5 and repeat the above steps to set and store the lower limit value Note 1 After the upper and or the lower limits counts have been set up the upper and or the lower limits can be used for all ranges However at different range the upper and or the lower limits represent different values according to their respective counts Note 2 The Compare function can be used with other arithmetic functions such as REL MINMAX and dBm modifiers e Operation Example Setting up the compare limits LO or PASS for Vdc measurement 35 3 13 Combinations of Arithmetic Functions The meter allows the user to use multiple arithmetic functions dBm MINMAX REL HOLD and COMP simultaneously The result of one arithmetic function can be computed again as shown in the following operation procedure flowchart Example Using the following procedures to set the upper and the lower limit values for COMP function When using the multiple arithmetic functions any types of modifier calculation can is be combined together as the operations shown above For example if Rel selected while dBm modifier is enabled the result of the dBm calculation becomes a relative base O for new measurements The sequences and the results of the combined arithmetic functions are shown in Table 3 9 step by step when all types of arithmetic functions are activated sequenti
90. s when the displayed reading reaches 99 9 rms value of the tested input signal at the same range 95 e DC Current Rate Range Resolution n RD Accuracy 1 year pecu pups di Reading amp Shunt Resistor 12mA 0 1pA 11 9999 0 05 15 2 0 15V 100 120mA 1 119 999 0 05 5 1 5V 100 1200mA 10 1199 99 0 15 5 0 3V 0 10 12A 1004A 11 9999 0 2 5 lt 0 6V 0 010 40mA 1 39 999 0 1 6 0 5V 100 120mA 10 119 99 0 1 3 lt 1 5V 100 1200mA 1004A 1199 9 0 15 3 lt 0 3V 0 10 12A 1mA 11 999 0 2 3 lt 0 6V 0 010 40mA 10 39 99 0 1 2 lt 0 5V 100 F 120mA 1004A 119 9 0 1 2 1 5V 100 1200mA 1mA 1199 0 15 2 lt 0 3V 0 10 12A 10mA 11 99 0 2 2 lt 0 6V 0 010 0 Typical at full scale reading and voltage across the input terminals 2 Use relative REL modifier e Maximum Input and Overload Current Protection for dc and ac current mA Input Terminal 1200mA dc or ac rms and protected with 2A 250V IEC 127 sheet 1 fast blow fuse 12A input terminal 10A dc or ac rms continuous or 12A dc or ac rms for 30 seconds maximum and protected with 15A 500V breaking capacity 10 000A fast blow fuse e Response Time Approximately 1 0 second when the displayed reading reaches 99 9 dc value of the tested input signal at the same range 96 e AC Current True RMS AC Coupling Mode Resolution Full Scale Reading an
91. s you to see two properties e g Vac and frequency of the input signal you are measuring The display contains two major parts primary display and secondary display See figure 3 1 The primary display contains of larger digits and annunciators and is located on the left side of the dual display Readings using the relative REL minimum maximum MIN MAX touch hold HOLD or decibels dBm modifier can be shown on the primary display only The secondary display contains of a set of smaller digits on the right side of the EJ dual display To press then followed by a function button to turn the secondary display on and press then followed by ES to turn the secondary display off If the secondary display has been turned on and selected a measurement function for the secondary display the reading on the primary display will not be affected NOTE If user select ini for the primary display only a diode test voltage will be shown on the secondary display continuity is restricted to the primary display only Neither function modifiers REL dBm HOLD nor MINMAX can be selected in the secondary display ape 1880832 TO DC C MP dBm XT TRIG T LOCAL STO RCL 2 10 13 14 15 16 18 Primary Display Secondary Display S MF PEAK HOLD MIN MAX REL dBm 4 2 W en exl ET ET ET ET LT EE 00 2ND AUTO EXT TRIG REI P
92. scriptions for SH Command Syntax Description SH s nnnnnn SH command is used to set high limit in counts for compare function S is a sign symbol for the high limit can be set as or nnnnnn is a six digit decimal number from 000000 to 199999 66 Example SH 102345 Rate Range High limit to be Slow 120 000 V 102 345V Medium 400 00V 1023 45V Fast 1 400 0V 1023 4 V Notes 1 Theleast setting digit is blank on the display of meter but it still uses to compare function To set least setting digit to 0 for fast mode as necessary Table 6 8 Descriptions for SL Command Syntax Description SL lt s gt lt nnnnnn gt function S is a sign symbol or SL command is used to set the low limit in counts for compare COMP 66 nnnnnn is six digit decimal number from 000000 to 199999 Example SL 098765 Rate Range Low limit to be Slow 120 000 V 98 765V Medium 400 00V 987 65V Fast 1 400 0V 987 6 V Notes 1 The least setting digit is blank on the display of meter but it still uses to compare function To set least setting digit to 0 for fast mode as necessary 57 Table 6 9 Descriptions for SR Command Syntax Description SR lt s gt lt nnnnnn gt S is a sign symbol or GG
93. ss 8 0 to 30 Talk OFF ON or OFF Beeper ON ON or OFF The Beeper mode is not a communication related parameter but to simplify the meter operation 3 11 Selecting Local Operation Mode Varn f uis p J return the operation control priority from remote mode computer controlled to local mode user controlled 28 3 12 Operating Arithmetic Functions e Using dBm Modifier The dBm measurement is used for decibel conversion of power per 1mW consumption into a 600Q load and can be applied to Vdc and Vac measurement functions only Voltage measurement is converted to dBm by using the following formula dBm 10x 10010 1000 x measurement value reference impedance r gt dBm then to toggle in and out dBm modifier mode when measuring Vdc or Vac function with default reference impedance 6000 The meter will displays the dBm modifier on the primary display and displays the reference impedance on the secondary display User may then use and v to rotate the selection of different impedance as desired when the selection mode is enabled the reference impedance selection is shown on the secondary display area 29 e Selecting Reference Impedance for dBm Modifier Z Ref eV st then to toggle in and out the Reference Impedance selection mode Any of the following 21 types of reference impedance may be selected 8000Q 12000 10000 9000 8000 6
94. that might occur during operation Table 7 5 SCPI Error Message 085 zl No error Parameter not allowed Command err Data type error Illegal parameter value 84 7 5 3 SCPI Command Summary pT a ea CONFigure SCALar Configure meter to perform specified CURRent Set the current measurement mode lt numeric value gt L 1 2 AC lt numeric value gt 1 a o2 DC DlOCtest Set the primary display to diode with the continuity test DISPlay Set and query the measurement rate type RATE lt SLOW MED FAST gt RATE FREQuency OI GI Set the meter to frequency measuring FUNCtion 1 2 Query the measurement function OFFDual peste Turn off the 2ND display OFFRecord Eg Turn off the dynamic recording mode RANGe Set the measurement range AUTO lt Boolean gt 1 2 AUTO 9 1 2 lt UP DOWN gt DIRection 1 2 RANGe L1 22 Query the measurement range RESistance Set the resistance measurement mode 2W numeric value gt 4W knumeric value gt VOLTage Set the voltage measurement mode knumeric value gt 1 2 lt numeric value gt 1 lt numeric value gt L 1 2 85 CALCulate Set the calculation function DBM IMPedance lt reference gt STAT lt Boolean gt LIMit FAIL LOWer DATA lt number value gt STAT lt Boolean gt UPPer
95. the error code The subroutine GPIBERR is called when a NI 488 function fails The error message is printed along with the status variables IBSTA IBERR IBCNT The subroutine DVMERR is called when the serial poll response byte indicates the meter does not have valid data to send The error message and the serial poll response byte are printed The NI 488 function IBONL is called from the main body of the program or from the two subroutines GPIBERR and DVMERR When the second parameter of the function IBONL is zero the software and hardware are disabled Execution of this program is terminated after the call to the function IBONL to disable the software and hardware The STOP command or END command will terminate this program QBDECL BAS contains constants declarations and subroutine prototypes REM INCLUDE qbdecl bas GPIBERR is an error subroutine that is called when a NI 488 function fails DVMERR is an error subroutine that is called when the meter does not have valid data to send DECLARE SUB gpiberr msg DECLARE SUB dvmerr msg spr CLS PRINT Read 10 measurements from the meter PRINT Assign a unique identifier to the meter and store in the variable DVM IBDEV opens an available device and assigns it to access GPIBO with a primary address of 1 a secondary address of 0 a timeout of 10 seconds the END message enabled and the EOS mode disabled If DVM is less than zero call GPIBERR with a
96. tion Example To enable REL modifier for Vdc measurement 33 LX Rel s AEL Ll shit Rel AA BN AY gt d r1 r1 E r1 x Rel A AA EAI a e Using COMP Compare Function COMP function compares the measurement inputs with the pre set upper and lower limits The compare function calculation expression is based on counts without decimal point HI Measurement value gt High HI limit value LO Measurement value Low LO limit value PASS High limit value gt Measurement value gt Low limit value When COMP function is enabled the actual measurement value will be shown in primary display and a comparison result HP LO or PASS will be shown in secondary display Operation Procedures exes Comp E 2 then to enable the COMP function Press 9 then Comp lt Auto again to disable the compare function e Setting a Compare Limit Value Using the following procedure to set the high and the low limit values for COMP function KOS hi 9 then to enter the high limit set up mode 34 The upper limit will be shown in primary display A vor to change this value gt 74 P St to store the high limit value in counts T1 feum E S P r
97. upling Mode Resolution and Full Scale Reading Range 1 Resolution Full Scale Reading S M amp F S M F S M F 120mV 400mV 1uV 10uV 100uV 119 999 399 99 399 9 1 2V 4V 10V 100uV 1mV 1 19999 3 9999 3 999 12V 40V 100uV 1 10 11 9999 39 999 39 99 120V 400V 1mV 10mV 100mV 119 999 399 99 399 9 750V 750V 10mV 100mV 1V 750 00 2 750 00 759 Vdc and Vac are automatically set at the same range 2 in Vac 750V range 5 over range 787 5V rms is readable Accuracy Rata Range Accuracy 1 year 1 50 to 5 kHz 5 to 30 kHz 120 000mV 1 5 200 3 300 1 20000V 1 5 200 3 300 S 12 0000V 1 5 200 3 300 120 000V 1 5 200 3 300 750 00V 1 5 200 3 300 2 400 00mV 1 5 82 3 100 4 0000V 1 5 82 3 100 M 40 000V 1 5 82 3 100 400 00V 1 5 82 3 100 2 750 0V 1 5 82 3 100 2 400 0mV 1 5 12 3 15 4 000V 1 5 12 3 15 40 00V 1 5 12 3 15 400 0V 1 5 12 3 15 2 750V 1 5 12 3 15 2 0 Specified accuracy at input gt 5 of full scale 2 Specified accuracy for input voltage at frequency lt 20kHz e Measurement method True RMS AC DC e Maximum Crest Factor 3 0 at full scale e Maximum input voltage 750V rms 1100V peak ac 2 107 V Hz product on any range normal mode input 1x106 v Hz product on any range common mode input e Input Impedance 1MQ in parallel with capacitance 12
98. urement range Use 1 to select the primary display and 2 to select the secondary display Response Return the range value as Table 7 4 Example CONE RANG Query the primary display measurement range CONF RANG 2 Query the secondary display measurement range 80 Table 7 4 Return values of measurement range Slow Rate Return Medium Fast Return Value Rate Value 120mV 0 12 400mV 0 4 1 2V 1 2 4V 4 DC Voltage 12V 12 40V 40 120V 120 400V 1000V 1000 1000V 120mV 0 12 400mV 1 2V 1 2 4V AC Voltage 12V 12 40V 120V 400V 750V 750V 12mA 40mA DC AC 120mA 120mA Current 1200mA 1200mA 12A 12A 120 400 1 2K 4K 12K 40K Resistance 120K 400K 1 2M 4M 12M 40M 120M 300M 1200Hz 1200Hz 12KHz 12KHz 120KHz 120KHz 1MHz 1MHz Function Frequency None for 2ND display 81 eCALCulate Subsystem CALCulate MODE Description Query the calculate mode type Response literal format Return the type string DBM dBm calculate REC record calculate LIM comparator calculate REL relative calculate NOR normal mode Example Return LIM DBM REC the status is comparator dBm and record mode on CALCulate DBM STAT Boolean Description Enable or disable the dBm calculation mode Parameter Boolean On 1 off 0 CALCulate DBM IMPedance reference Description Set dBm reference impedance Parameter refere
99. vanced features and applications that help the user to operate the meter more effectively The user must be familiar with the basic measurement operations described in Section 2 and Section 3 and has a basic understanding of electronics knowledge 4 2 Applications for Using Dual Display The dual display capability is one of the most useful features provided with the meter User may take the advantages to greatly enhance the test and measurement capabilities Some common combinations and applications of using dual display are provided in Table 4 1 Table 4 1 Typical Combinations and Applications for Using Dual Display Prima Seconda oe Applications EW e Testing DC to AC or AC to DC converter circuit Dese e Measuring DC level and AC ripple of power supply e Testing power supply load regulation e Checking loop current and voltage drop level ETT A Testing line and load regulation Adc e Testing AC to DC or DC to AC converters E e Measuring DC level and AC ripple of power supply e Testing transformer e Measuring AC frequency response of amplifier circuit e Adjusting AC motor control e Measuring AC ripple and DC current of power supply Den e Measuring current dissipation for power supply analysis Referencefl SetingdBreferenceimpedansandshowdEm 0 votageanaaem ___ amm vae AC votage ana dem dim e e Checking fr
100. vel Approximately below 50mV dc e Maximum Input Protection 500V dc or ac rms e Resistance Continuity 2 wire Rate Range Resolution Maximum Reading Accuracy S 1200 1mQ 119 999 0 15 8 1 M 4000 10mQ 399 99 0 15 5 F 4000 100m2 399 9 0 15 2 Use relative REL modifier Open Circuit Voltage lt 5 0V dc e Test Current Approximately 0 5mA e Audible Tone Continuous beep for reading is less than 100 e Zeroing error 0 050 or less excluding test lead resistances in each range when REL modifier is used e Maximum Input Protection 500V dc or ac rms 113 e Frequency Resolution Full Scale Reading and Accuracy Range Measurement Resolution Full Scale Accuracy Input Sensitivity Hz Range Hz Hz Reading 1 year 1 Sine wave 1200 5 to1200 1199 99 0 01 5 12k 10 to 12k 11 9999 0 01 3 50mV rms 420k 400 to 120k 119 999 0 01 3 un Specified accuracy at input gt 5 of full scale 2 If tested frequency is greater than 1MHz it will be displayed but no specified accuracy is guaranteed e Measurement method True RMS e Maximum Crest Factor 3 0 at full scale e Maximum input voltage 750V rms 1100V peak ac 2x107 V Hz product on any range normal mode input 1x106 v Hz product on any range common mode input e Input Impedance 1MQ in parallel with capacitance 120pF e Response Time Approximately 1 2 seconds when the displayed reading reach
101. w 50mV approximately 1009 Readings are displayed in the 1 2V range at the slow measurement rate and 4V range at the medium and fast measurement rates OL is displayed for voltage above 1 2V at the slow measurement rate and 2 5V at the medium and fast measurement rates If the diode continuity test is performed at the slow reading rate readings are displayed in 10uUV resolution on the 1 19999V 1 2V range The continuity test measures the resistance of a tested circuit with 2 wire method at approximately 0 5mA and determines whether a circuit is intact The beeper generates a continuous beep tone when the input resistance value is less than approximately 10Q For continuity test the measurement range will be fixed at 120Q range if the slow reading rate is selected The measurement range will be fixed at 400Q range if the medium or fast reading rate is selected Press buds to select diode test function then connect the test leads across the diode under test as shown in Figure 2 7 Reversing the polarity will reverse bias the diode Phen again to select continuity test function then connect the test Press leads or across the tested circuit as shown in Figure 2 8 E Power Setup ON OFF Rel Off f e 59 Shift a A n Hoa 2m gt WARNING To avoid damaging to the meter do not apply a voltage exceeding 500 V peak between the
102. y display Note 1 Press 9 then Off 2nd may turn off secondary display A or to select auto ranging or manual range for Note 2 Regarding secondary display function setting please refer to Section 3 10 42 e Measuring DC voltage and DC current on a transistor circuit or load To display DC voltage in primary display and the frequency in secondary display or vise versus while testing a transistor amplifier circuit user may check its Hg or calculate its DC load consumption by using dual display 1 Connect the meter to the unit under test as shown below _ a ae r DUAL DISPLAY MULTIMETER og ou 0 ogg l l l l v 20 AUTO DC C ee ELI oe f J C V Hi Y Rate 3 f Power S LA t Win Loca Shit C LOAD J Lan ES ON ore dim Com Re Rea ren A yoa Rel A DC VOLTAGE SOURCE NV N N WARNING 1 Select a correct input terminal according to the input range to be used 2 To avoid damaging the meter do not apply more than 12A to 12A input terminal 2 5 to select AC voltage measurement function for primary display 4 or to select auto ranging or manual range for Or 3 J Am primary display Z Cun
103. year 1 20 to 45 Hz 45 to 10k Hz 10 to 30 kHz 30 to 100 kHz 120 000mV 1 100 0 2 100 1 5 300 5 300 1 20000V 1 100 0 2 100 1 100 3 200 S 12 0000V 1 100 0 2 100 1 100 3 200 120 000V 1 100 0 2 100 1 100 3 200 750 00V 1 100 2 0 2 100 1 100 3 200 400 00mV 1 40 0 2 40 1 5 80 5 120 4 0000V 1 40 0 2 40 1 40 3 80 M 40 000V 1 40 0 2 40 1 40 3 80 400 00V 1 40 0 2 40 1 40 3 80 750 0V 1 40 2 0 2 40 1 40 3 80 400 0mV 196 5 0 2 5 1 5 10 5 15 4 000V 1 5 0 2 5 1 5 3 10 F 40 00 196 5 0 2 5 1 5 3 10 400 0V 1 5 2 0 2 5 1 5 3 10 750V 1 5 2 0 2 5 1 5 3 10 9 1 Specified accuracy at input gt 5 of full scale 2 For input lt 200V rms 3 For input lt 500V rms e Measurement method True RMS Maximum Crest Factor 3 0 at full scale e Maximum input voltage 750V rms 1100V peak ac 2 107 V Hz product on any range normal mode input 1x106 v Hz product on any range common mode input e Input Impedance 1MQ in parallel with capacitance 120pF e Response Time Approximately 1 5 seconds when the displayed reading reaches 99 9 ac rms value of the tested input signal at the same range 94 e AC Voltage True RMS AC DC Coupling Mode Resolution and Full Scale Reading Range 1 Resolution Full Scale Reading S M amp F S M

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