8540 DC Load User Manual - 首頁
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1. BK PRECISION 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 2008 B amp K Precision Corp Printed in China version 0408112. indicate a fail to the test sequence The top display will show SP where is the step number that triggered the error At this point you will hear rapid beeping for 5 seconds before the sequence ends YT Ie aniseed 8540 150W DC Electronic Load on oO mp AO BIO EO BIO For safety the input terminal will automatically be turned OFF after the error condition occurs O v Shor cv O O w 20a Ler Cy a O A OFF Snit O Knob incremental values The following table shows the incremental changes in the set value when the knob is turned corresponding to which cursor LED is lit Cursor voltage current Resistance Increment position Increment Increment 0 3A 1A 100 999 Q 100 Q 0 30A 10A 1000 4000 Q 1000 Q 0 30A 1000 4000 Q 100 Q 0 30A 0 1 10 Q 0 001 Q 0 3A 0 001A 10 99 Q 0 01 QO 0 01 V 0 30A 0 01A WOA 0 1 10 Q 0 01 Q0 Specifications 0 10 V 0 05 0 1 FS Load Regulation 0 60 V 0 05 0 1 FS 0 1 0 1 FS 0 30 A 0 1 0 15 FS CV Mode 5 A 2 co gt 0 1 10 Q 1 0 8 FS 0 001 Q CR Mode 10 99 Q 1 0 8 FS 0 01 0 0 10 W 1 0 5 FS 1 mW Power Measurement 10 99 W 1 0 5 FS 10 mW 100 150 W 1 0 5 FS 100 mW 88 x 175 x 282 mm Dimension W x xP 3 5 x 6 9 x 11 10 inches 2 7 kg Weight net 6 pounds Specifications and information are subject to change without notice Please visit www bkprecision com for the most c
3. 7 Select upper limit of input current This parameter is used to limit testing or test setups that must stay within a customized range of values Change this value to the upper bound limit for the input current If current exceeds this limit while the sequence is running this step it will stop and show an error condition See Error Condition section for details In this example we will set to 30 00 A Press to go and configure the next parameter Step 8 Select lower limit of input current This parameter is used to limit testing or test setups that must stay within a customized range of values Change this value to the lower bound limit for the input current If current is less than this limit while the sequence is running this step it will stop and show an error condition See Error Condition section for details In this example we will set to 0 00 A Press to go and configure the next parameter 1 Qa eee 8540 150W DC Electronic Load on p AO BO EO BO Programmable Range 0 00 30 00 Use the keys to change cursor position shown by the LED light next to either A B C or D These four denotes cursor position with A selecting the most significant figure and D the least significant figure gt Oz K lt O ofs ofs off off dof oles le Qa See 8540 150W DC Electronic Load ioe v mp AO BO EO BO Of ols ogjelg gt Oz lt O ols og ofgjelf Progra
4. CC LED The load is now in CC mode Set the current value by pressing the or keys to select the digit to adjust then turn the knob to change its value After setting the current value press the key to turn the load on 8540 Indicates which digit to adjust Constant Voltage Mode Press the key to turn on the CV LED The load is now in CV mode Set the voltage value by pressing the or keys to select the digit to adjust then turn the knob to change its value After setting the voltage value press the key to turn the load on Set value B JEDN 8540 150W DC Electronic Load Constant Resistance Mode Press the imode key to turn on the BK PRECISION CR LED The load is now in CR mode 150W DC Electronic Load Set the resistance value by pressing the or keys to select the digit to adjust then turn the knob After setting the voltage value press AIO BIO KO BIO the key to turn the load on Input on off The load can be toggled on and off by pressing the key The programmed setting is not affected The OFF LED will be lit when the load is off P EAEri 8540 Change the displayed values 150w Dc electronic Load The electronic load usually displays the actual voltage and current values Press the lView key to display the preset voltage current or resistance AIO BIO EO BIO value and the actual power Press the key again to return to the current voltage display OCP function OCP Press the key t
5. s you can start running those sequences by doing the following Only 25 steps can be run at one time Press key to run programmed steps 0 to 24 Press ak to run programmed steps 25 to 49 El view Press View key to run programmed steps 50 to 74 Press key to run programmed steps 75 to 99 When sequence is running a beep sound will occur whenever it jumps to the next step Although programmed steps can be set with minimum resolution of 1 mA 1 mV 1 mQ when running the sequence the minimum display resolution will only be 10 mA 10 mV 10 mQ The running sequence will stop if the step data value is 0 000 It will not run all 25 steps in each sequence unless each step has a data value greater than 0 000 CAUTION Once a sequence starts running other key press will interrupt the setting but the sequence will still continue to run until it ends Additionally the input will turn ON automatically To stop the sequence immediately go into the LIST menu and exit again This will stop the sequence but input status will remain ON if it was already ON prior to entering the LIST menu Otherwise turning the power switch OFF will be the quickest and safest way to end the run Error Condition The upper and lower limit voltage and current parameters in each step configuration sets test boundaries While a sequence is running if the measured voltage or current exceeds these boundaries an error condition will occur to
6. INSTRUCTION BK PRECISION MANUAL MT ERLT Model 8540 60V 30A 150W DC Electronic Load 854 BK PRECISION 8540 150W DC Electronic Load Set Recall CC V Short CV A e Ce a w 30A cR A OFF Shift Safety Regulations To avoid electrical shock do not open the cabinet Refer servicing to qualified personnel only To avoid injuries always disconnect power discharge circuits and remove external voltage sources before touching components KEEP AWAY FROM LIVE CIRCUITS We cannot accept responsibility for any direct or indirect financial damage or loss of profit that might occur when using the electronic load The instrument chassis and cover must be connected to an electrical ground Certification We certify that this product met its published specifications at time of shipment from the factory Notice The information contained in this document is subject to change without notice Please consult the B amp K Precision website www bkprecision com for the latest version Compliance Statements Disposal of Old Electrical amp Electronic Equipment Applicable in the European Union and other European countries with separate collection systems This product is subject to Directive 2002 96 EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment WEEE and in jurisdictions adopting that Directive is marked as being put on the market after August 13 2005 an
7. d should not be disposed of as unsorted municipal waste Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all p applicable requirements Safety Symbols Connect it to safety earth ground using the wire recommended in the user s manual A N High voltage danger The symbol on an instrument indicates that the user should refer to the operating instructions located in the manual Initial Check Unpacking the instrument This instrument was carefully inspected before shipment Upon receipt inspect the instrument for damage that might have occurred in transit If any sign of damage is found notify your B amp K Precision distributor Check the list of supplied items Verify that you have received the following items with your power supply If anything is missing contact your authorized B amp K Precision distributor 8540 DC Electronic load Power cord Instruction manual Power Requirements The 8540 can operate on 110V AC or 220V AC line input Before connecting the power cord to an AC outlet make sure the voltage selector in the rear is set to the correct line voltage Additionally please check that you have the correct fuse inserted in the fuse box below the AC input receptacle The fuse to use is referenced in the below table 110V AC 99 V to 121 V TO 500 mA 250V 220V AC 198 V to 242 V TO 250 mA 250V To access the fuse first disconnect the po
8. e key to confirm selection of the displayed storage group There are 40 groups that can be stored le Qa See 8540 150W DC Electronic Load ioe v p AO BO EO BIO of e s olgjolg r Oz lt O ofgjof okok EAEN 8540 150W DC Electronic Load AO BIO EAO BIO Q g wn v O O gt O K lt O slog oglogl Ele of O O YT I aniseed 8540 150W DC Electronic Load wn v p AO BIO eO BIO Of alg ofeJolsl gt O lt O Ofglolg offjolf Store Operation To save the load s settings to a register internal memory press the Cand Save keys The _ A D LEDs will blink together Press the E9 or E gt orf lView orma keys to save the settings to non volatile memory Pressing A will store to A location B to B location C to C location D to D location Hence users can save up to four settings in each group Note you may do this for any of the 40 different groups assigned in the previous paragraph Choose Storage Group Each settings can store two parameters The mode of operation i e CC CV CR and the values set for that mode Recall Operation Press the Hig and Gb Recall keys The Recall LED will turn on which means you may recall settings from the currently chosen group Press the ma or E or GiView or GiMede keys to recall the desired setting When the Recall LED is lit the other keys are disabled To exit the recall state press the and Recall keys aga
9. hen press the key The display will show OCP Over Current Protection This is the maximum current that will be allowed Use the and keys and the knob to set the AO BO EO BIO value NOTE The input of the electronic load will be turned off automatically if the OCP value is lower than the actual current value The default OCP setting is 30 A REL function rEL BK PRECISION After setting OCP press io eniey 8 Oe erone toad the REL setting Use the knob to select ON or OFF The default is OFF which means the display will show your set value on the top display while you make AIO BO EO BIO adjustments It will then blink for 2 seconds before toggling the display to show measured voltage If users want to adjust the set value using knob while see the measured voltage and current simultaneously without interruption select ON IF ate red 8540 150W DC Electronic Load 8540 Key sound bEEP Press again to turn the key sound ON or OFF bEEP Use the rotary knob to make your selection Set address Add Press Clview twice to skip the address menu and advance to the next menu This setting is for factory use only and should be ignored Choose Storage Group Grp Press the lWiew key to see the storage group GrP setting Use the ma and keys and knob to choose the storage group Each group can store four instrument settings Each setting can store two parameters see storage operation Press th
10. imit while the sequence is running this step it will stop and show an error condition See Error Condition section for details In this example we will set to 60 00 V Press to go and configure the next parameter Step 6 Select lower limit of input voltage This parameter is used to limit testing or test setups that must stay within a customized range of values Change this value to the lower bound limit for the input voltage If voltage is less than this limit while the sequence is running this step it will stop and show an error condition See Error Condition section for details In this example we will set to 0 00 V Press to go and configure the next parameter 1 a eel 8540 150W DC Electronic Load on p AO BO EO BO Programmable Range 0 00 60 00 Use the keys to change cursor position shown by the LED light next to either A B C or D These four denotes cursor position with A selecting the most significant figure and D the least significant figure gt Oz K lt O ofs ofs off off dof oles le art zee 8540 150W DC Electronic Load ioe v mp AO BO EO BO Of ols ogjelg gt Oz lt O ols og ofgjelf Programmable Range 0 00 60 00 Use the keys to change cursor position shown by the LED light next to either A B C or D These four denotes cursor position with A selecting the most significant figure and D the least significant figure Step
11. in Short When the keys are pressed the load simulates a short circuit In CC and CR modes the maximum short circuit current value is 1 2 times the current range In CV mode the short circuit current is the same as setting the CV operation to 0 1 V Note that the short circuit current in CV mode will be less than the short circuit current in CC or CR modes Current range switch 3 30 A The Bait and keys switch between the 3 A and 30A ranges The 30A LED is lit when the load is on the 30 Arange The current resolution is 10 mA for the 30 A range and 1 mA for the 3 A range Checking the set value The electronic load usually displays the actual voltage and current values at the load s terminals To check the set value press the 4 or b keys The set value display will blink showing you the currently set value You can use the knob to change it It will stop blinking after 3 seconds and revert to the previous display You can also turn the knob to see the set value Verify Firmware To verify the firmware version of your DC Electronic load do the following First power off the unit Then hold down the button Turn the power switch ON while holding down the button The top display will show VEr and bottom display will show a number which is the firmware version of your load LIST mode for firmware version 1 60 or above only LIST mode is an added feature applicable for newer firmware versions of 8540 specifica
12. lly version 1 60 or above This feature allows users to program a list of sequence steps that may be useful in some automated test applications or Go No Go type of testing This feature can only be used when the load is booted into this mode It cannot be used in conjunction with normal operating mode that allows you to quickly set your settings or do save recall setup operations Users can choose to either run in normal operating mode or in list mode How to access LIST function To boot the instrument into LIST mode first power OFF the instrument Now press and hold the key while switching the power to ON At this point the load will enter LIST function and all other keys will not function like it would in normal mode They will instead be used for setting up and controlling list mode LIST mode structure The LIST mode feature allows users to program and store into internal memory up to 4 sequences with maximum of 25 steps in each sequence The storage memory is broken down into 4 blocks for storing sequences We will refer these sequences as A B C and D Sequence A stores step 0 to 24 25 steps total Sequence B stores step 25 to 49 25 steps total Sequence C stores step 50 to 74 25 steps total Sequence D stores step 75 to 99 25 steps total Users can store a combine all 4 sequences total of 100 steps but are only allowed to run one sequence for maximum of 25 steps at a time Programmable List Settings When
13. mmable Range 0 00 30 00 Use the keys to change cursor position shown by the LED light next to either A B C or D These four denotes cursor position with A selecting the most significant figure and D the least significant figure Step 9 Repeat step configurations Repeat steps 1 8 except in step one select step number as an increment to the next step Create a sequence of 5 steps with the following parameters Voltage Voltage Current Current Limit Limit Limit Limit 2 000V 5s _ 60 00V 0 00V 30 00A 0 00A 110 000 5s _ 60 00V 0 00V 30 00A 0 00A 5s Q 5s A 5s 0 000A 5s 60 00v 0 00V 30 00A 0 00A Steps 4 has been set with data value of 0 000 A to denote the end of the sequence Always set the last step of your sequence to 0 000 under data value if the sequence has less than 25 steps Otherwise the load will only stop at the step that contains either a data value of 0 or after the 25t step Step 10 Save and Exit LIST menu Once finished press the key then press key to save and exit the programmed sequence s Users can program all 100 steps 0 to 99 at once without having to select the memory storage group Following the example the below sequence is programmed and can be ran from the instrument 10 0 CR 2V CV 2A CC 1A CC S SS SS oo a E 5 seconds 5 seconds 5 seconds 5 seconds Run Programmed Sequence After programming and saving the sequence
14. or Voltage display indicator BK PRECISION 8540 Voltage or preset current 150W DC Electronic Load Set Recall CC voltage or resistance value CC mode indicator Recall indicator Shot CV CV mode indicator Short indicator Step B memory B v Step A memory A 30A CR indi Step C memory C CR mode indicator Step D memory D 30A mode selector indicator OFF Shift Shift indicator Current or power value Input off indicator Power display indicator Current display indicator Memory save shift lt ___ Save Recall Recall shift Left arrow memory A Right arrow memory B Function setup shift lt Setup SS AP 3 30A 3 30A selector shift Switch memory C Mode selector memory D Short on off lt Short Input on off button Shift button Aic ow input _ __ rs js Input Main power on off Input POWER gt Quick Start Set the line voltage selector on the back panel to your local line voltage 110 VAC or 220 VAC Change the fuse to the correct fuse according to the table under Initial Check section Confirm that both changes are correct BEFORE connecting the power cord to the DC load and a wall power socket Turn on the power to the DC load by flipping the power switch to I position Set value Constant Current Mode Press the key to turn on the 150W DC Electronic Load
15. programming each step users can program the following Note Words in bold is the parameter name and words in is what s shown on the top display of the instrument when the parameter in bold is selected Type tyPE Refers CC CV CR modes Data dAt Refers to the actual step value Units are in amps A for CC volts V for CV and ohms Q for CR mode Delay Time dt Refers to the step time which is the time to hold the programmed step value Programmable range 0 4 seconds to 25 seconds HV HU Refers to upper limit of the input voltage LV LU Refers to the lower limit of the input voltage HA HA Refers to the upper limit of the input current LA LA Refers to the lower limit of the input current Denotes parameters that can be used for Go No Go or limits testing Refer to Setup List Parameters section below for details Setup List Parameters Below is an example with step by step instructions on setting up a sequence using list modes Step 1 Select step number to program If not already boot the instrument into LIST mode by holding the key while switching on the power button Press Shit then to enter the LIST menu for programming LIST parameters The display will look like the one on the right If you want to program from the first step leave it shown on the bottom display as 0 In this example we will start from 0 After entering all parameters as
16. signed for the step the menu system will automatically go back to this setup screen with step number automatically incremented by 1 You only need to adjust this if you want to edit a programmed step later on or if you want to program a different step Press to go and configure the next parameter Step 2 Select type Bottom display will show the type for step 0 Use the knob to select between CC CV or CR type When running the list this step will set the load to the selected type of operation In this example we will select CC Press to go and configure the next parameter YT EDE 8540 150W DC Electronic Load wn g mk AO BIO COO DO Programmable Range 0 99 Use the keys to change cursor position shown by the LED light next to either A B C or D These four denotes cursor position with A selecting the most significant figure and D the least significant figure O v Shor cv O O w 20a Ler OOO A OFF Snin O YT Ie Qa eee 8540 150W DC Electronic Load wn g p AlO BO COO BO Users can create a sequence with a mixed combination of different types in each step i e One step can run in CC while another step in CV gt O lt O olg ofs olek dg off ole Step 3 Select step value Select the data value you want programmed for the selected step If you enter 0 000 this denotes the end of the sequence and it will stop on this s
17. te return shipping address contact name phone number and description of problem Limited One Year Warranty B amp K Precision Corp warrants to the original purchaser that its products and the component parts thereof will be free from defects in workmanship and materials for a period of one year from date of purchase B amp K Precision Corp will without charge repair or replace at its option the defective product or its component parts The returned product must be accompanied by proof of the purchase date in the form of a sales receipt To obtain warranty coverage in the U S A this product must be registered by completing a warranty registration form on www bkprecision com within fifteen 15 days of purchase Exclusions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs The warranty is void if the serial number is altered defaced or removed B amp K Precision Corp shall not be liable for any consequential damages including without limitation damages resulting from loss of use Some states do not allow limitations of incidental or consequential damages So the above limitation or exclusion may not apply to you This warranty gives you specific rights and you may have other rights which vary from state to state B amp K Precision Corp 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 714 921 9095 Intentionally left blank
18. tep The maximum value will depend on the type selected in previous step See programmable range on the right for reference In this example we will enter 1 000 A Press to go and configure the next parameter Step 4 Select delay time dt on the top display refers to delay time for the selected step In this example we will set it to 5 seconds Press to go and configure the next parameter Ie anise eT 8540 150W DC Electronic Load AO BIO GOO BO Programmable Range 0 000 CC 0 100 CV 0 100 CR 30 00 CC 60 0 CV 4000 CR Use the keys to change cursor position shown by the LED light next to either A B C or D These four denotes cursor position with A selecting the most significant figure and D the least significant figure EON 8540 150W DC Electronic Load Q e d iv Canal O s O O R O AO BIO EO BIO O O pe lt s O gt Oz lt O sl H O O Programmable Range 0 4 seconds to 25 seconds Use the keys to change cursor position shown by the LED light next to either A B C or D These four denotes cursor position with A selecting the most significant figure and D the least significant figure Step 5 Select upper limit of input voltage This parameter is used to limit testing or test setups that must stay within a customized range of values Change this value to the upper bound limit for the input voltage If voltage exceeds this l
19. urrent product information ro oo oo gt gt Warranty Service Information Warranty Service Please go the service and support section on our website www bkprecision com to obtain a RMA Return the product in the original packaging with proof of purchase to the address below Clearly state on the RMA the performance problem and return any leads probes connectors and accessories that you are using with the device Non Warranty Service Please go the service and support section on our website www bkprecision com to obtain a RMA Return the product in the original packaging to the address below Clearly state on the RMA the performance problem and return any leads probes connectors and accessories that you are using with the device Customers not on an open account must include payment in the form of a money order or credit card For the most current repair charges please refer to the service and support section on our website Return all merchandise to B amp K Precision Corp with pre paid shipping The flat rate repair charge for Non Warranty Service does not include return shipping Return shipping to locations in North America is included for Warranty Service For overnight shipments and non North American shipping fees please contact B amp K Precision Corp B amp K Precision Corp 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 714 921 9095 Include with the returned instrument your comple
20. wer cord and then remove the fuse cartridge Power on procedure Turn on the instrument by pressing the main power switch on the front panel of the unit The instrument will automatically revert to the last setting before the power was turned off The 9 pin D sub connector in the rear is for factory use only This instrument does not offer remote control interface or programmability About the 8540 The B amp K Precision 8540 DC electronic load 60V 30A 150W can sink DC current in constant current constant voltage and constant resistance modes Measured values have 10 mV and 1 mA resolution Shorts can be simulated Storage is provided for up to 40 groups with 4 instrument setups per group The instrument is easy to use and will find many uses for testing DC power supplies batteries and DC to DC converters Constant Current CC mode Constant Voltage CV mode Constant Resistance CR mode Features Full digital control a1mV 1mA measurement resolution aCompact size Bright readable LED display Operating modes CC CV CR alnput on off control sHigh reliability due to OCP OVP over current over voltage protection uStorage for 40 groups 4 setups each mEasy operation 40 groups are applicable for units with firmware version 1 60 or above For versions below 1 60 100 groups are available Go to Verify firmware section to determine your instrument version Panel layout Setup indicat
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