3700 SERIES user manual
Contents
1. button to confirm the current value 2 3 2 P set set up a constant power 3700 Series electronic load can be set up for a constant power Constant power setup procedure is as following Press P set SET POWER 30 0W NEW Enter the password Or jump to step 4 if the ENTER PASWORD keyboard is unlocked Press OK button it will return to step 2 ENTER PASWORD if your password is wrong for reentering Press P set to enter the original value which SET POWER 30 0W displayed on the LCD or enter a new value by NEW 72 2 using the number key or rotate Rotary SW to adjust the power value and then press the P set button for confirmation It will exit the setting up current operation at any procedure by press ESC button 2 3 3 R set set up a constant resistance 3700 Series electronic load can be setup for a constant resistance Constant resistance setup procedure is as following Press R set SET RISIS 200 0 NEW Enter the password Or jump to step 4 if the keyboard ENTER PASWORD is unlocked 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 8 3700 SERIES USER MANUAL Press OK button it will return to step 2 if your password is wrong for reentering Press R set to enter the original value which displayed on the LCD or enter a new value by using the number key or rotate Rotary SW to adjust the power2. Mounting rack 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 2 3700 SERIES USER MANUAL 1 3 Features 1 LCD display with back light 2 Number keypad 3 High resolution at 1mV 4 Protection for over current 5 Protection for over power 6 Adjustable constant resistance constant current and constant power output 7 Can be set by number key or rotary code switch 8 Power shut down memory function 9 Monitored by PC software 10 Mini size and light weight 11 Can be used in parallel connection 12 Programmable output 1 4 Dimension and Structure 1 4 1 Dimension Fig 1 Dimension of 3700 Series Programmable DC electronic load 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 3 3700 SERIES USER MANUAL 1 4 2 Structure 1 4 2 1 Front view Front panel is for users to operate and there is one LCD display one number keypad and one rotary keypad Please see the following picture Fig2 Front view of 3700 Series DC electronic load 1 LCD display 0 000A 0 000V OF 0 0W 0 000A_ IS The real current value voltage value and output status Fig3 LCD Display of 3700 Series electronic load The output power rated value constant power constant resistance and program output 2 Arrangement of the Keyboard In common state the keyboard will execute the prompting functions of the black words i Out ON OFF Switch ON OFF the output And in special
3. 1 Set up maximum current 2 Set up maximum power 3 Set up the programming 4 Set up the communication 5 Set up password 2 3 The operation of the function We know that there are 8 main functions and 5 sub functions of this electronic load the following will descript how to operate all of the functions Before any operation please connect the power and switch the power on then the power indicator will be lighted 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 6 3700 SERIES USER MANUAL 2 3 1 I set set up a constant current Set up a constant DC current output is the first main function of programmable DC electronic load 3710A electronic load provides two methods to set up the constant DC cur rent output by using the number keyboard and the rotary button Please see the following operation procedure Press I set SET CURR 0 00A NEW Enter the password Or jump to step 4 if the ENTER PASWORD keyboard is unlocked Press OK button it will return to step 2 if your ENTER PASWORD password is wrong for reentering Press I set to enter the original value which displayed SET CURR 2 00A on the LCD or enter a new value by using the number NEW key or rotate Rotary SW to adjust the voltage value and then press the I set button for confirmation It will exit the setting up voltage operation at any procedure by press ESC button For example how to set up th
4. Program Files Array Electronic Fig 1 5 Installation Interface 5 Set Installation Folder 1 1 6 This interface is set for select the setup type Generally select and click Typical and then select NEXT Fig 1 6 Installation Interface 6 Set Type 3700 Series Programmable DC Electronic Load 24 VERSION 1 0 2003 1 3700 SERIES USER MANUAL 1 1 7 This interface is to modify the file name and the default file name is ELECT Generally this step will not be used and it will be OK to directly click NEXT Fig 1 7 Installation Interface 7 Modify File Name 1 1 8 The system entering this interface please wait patiently for the files to be copied to your hard disk Fig 1 8 Installation Interface 8 Copy Files After the competition of the copy the system installation of the Electronic Load is finished 1 2 Start 1 2 1 As in Fig 1 9 select the file folder Start Program Array and then select and click the menu item Electronic And it will be OK Fig 1 9 Start the System 3700 Series Programmable DC Electronic Load 20 VERSION 1 0 2003 1 3700 SERIES USER MANUAL 1 2 2 The start diagram is as follows Programmable LEO Hlor il Fig 1 10 System Start Diagram 1 2 3 Enter the Main Interface Se J eee Fig 1 11 Main Interface of Electronic Load P PC and Panel ae Control State poe A Pon Saks e Power State of the Electronic Load These
5. data It means that you needn t to set up again for the usually requirement and it bring your much ease to use The recall operation is as following Press Recall button FERRET 2K WEERA KK Enter the number of the set data which you want to recall from 1 to 10 by using the number key or rotate RECALL 1 the rotary button to change the number you want recall Press Enter button to confirm if the number is out RECALL of the range from 1 to 10 it will retune to Step 2 for reenter It will exit the Recall operation at any procedure by press ESC button 2 3 6 Switch ON OFF power output The output of 3700 Series type electronic load should be off when it is powered users can change the output status by using ON OFF button The button is a turn over button when the original output is ON press the button then the output will be changed to OFF status when the original output is OFF press the button then the output will be changed to ON status 2 3 7 The function of the Menu 3700 Series electronic load provides a Menu operation for some special functions The operation and function are as following Step 1 Press Menu button Step 2 The LCD display the menu functions one by one MAX CURRENT SET user can use the UP and DOWN button to change MAX POWER SET the selecting each function Press Enter button PROGRAM SET to execute the selected function COMMUNICATION SET ADRESS SET SAVE OPTI
6. mode it will change into the functions of the orange color words R set Set up constant resistance value I set Set up constant current value P set Set up constant power value Fig4 Key board of 3700 Series DC electronic load Menu Menu function operation W The down moving key mV mA Represent mV at the voltage mode and represent mA at the current mode 3700 Series Programmable DC Electronic Load 4 VERSION 1 0 2003 1 3700 SERIES USER MANUAL 3 Rotary code switch and function keys gt The right moving key ADJUST OK Confirmation key Fig5 Rotary and function keys 1 4 2 2 Back view Wire rack PC connection interface fan wrap Change over Switch Fig6 Back view The fuse can be changed easily by using a small screw driver Please use a fuse within the range of 0 3 0 5A 3700 Series Programmable DC Electronic Load 5 VERSION 1 0 2003 1 3700 SERIES USER MANUAL Chapter 2 Operation 2 1 General operation 1 Connect the electronic load with PC 3311 Cable COW i a E 3700 Series electronic load Fig 2 1 Connect the electronic load with PC 2 2 Function introduction 2 2 1 Main functions 1 Set up a constant current output 2 Set up a constant power output 4 Set up a constant resistance output 5 Store 10 sets of date which had been set up 6 Recall the stored data 7 Start Stop 8 Switch ON OFF the electronic load output 2 2 2 Sub functions
7. this time the title of the interface change into COM Setting Running and the communication is normal Then the Communication Address can be set Before setting the Communication Address be sure that the PC is in control of the Load Thus the new address can be effective otherwise it will reduce the stop of the communication The two switches in the middle of the top side are used to adjust the control of the lower machine the Load and the power After running turn the two switches to the top and then all the set can be effective The ON OFF State of the p The Control of PC ai and the Panel Lower Machine Load J J i Ot ET Fig 2 2 the Control of the Lower Machine Load and the PC OFF Turn off the Power Supply ON Turn On the Power Supply SELF Control by the Panel PC The Control of the PC 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 25 3700 SERIES USER MANUAL 2 2 The Current Limit and the Power Limit Set fiz 63 f The Power Limit Current Ta Power Limit Fig 2 3 Limit Setup Only after the value is set can the current and power be set Otherwise there will be an alarming dialogue frame Electronic Load xi You Must Setting Limit First 2 3 The Current Value the Power Value and the Resistance Value Set AIEI PEI tay _ i Fig 2 4 1 Setup the Current Value the Power Value and the Resistance Value Using Rotary When a parameter need to be set
8. 0 then press OK to confirm and then LCD will display 8 At this time you need to enter a time value for the second step the range of this time value is from 1 to 7200 seconds such as 60 seconds so you should enter 60 then press OK to confirm and the LCD will display 9 At this time you need to enter a power value for third step such as 150W so you should enter 150 then press OK to confirm and then LCD will display 10 At this time you need to enter a time value for the third step such as 120 seconds so you should enter 120 then press OK to confirm and the LCD will display 3700 Series Programmable DC Electronic Load 14 VERSION 1 0 2003 1 3700 SERIES USER MANUAL 11 At this time if you select ONE TIME and press OK to confirm then the constant power will be provided by this load at the following schedule Step 1 SOW for 30 seconds Step 2 100W for 60 seconds Step 3 150W for 120 seconds If you select REPEAT and press OK to confirm then the constant currents schedule as the above will be provided repeatedly 3 Set a program to provide a constant Resistance Output 1 Select RESISTANCE OUT press OK to confirm 2 The LCD will display 3 Enter the step number if you want to set 3 steps then enter 3 then press OK to confirm Please pay attention to the range of this value is from 1 to 11 Maximum is 11 steps 4 The LCD will display 5 You need to enter a resistance valu
9. 7 Set up SAVE OPTION 18 2 3 7 8 EXIT FUnction cccccsccsscsscessesesetseteeeseeeees 18 ElectronicLoad Software Chapter 1 System Installation eee 20 1 Wlnstallationiin nies nied ait eee ee 20 1 2 Start the System ite tte ien ea 22 1 3 Uninstall the System eeeeesesseeseeersesrersrsseseeee 24 Chapter 2 Functions Introduction eee 25 2 1 COM Port Set Interface eee eseeeereeeeee 25 2 2 The Current Limit and the Power Limit Set 26 2 3 The Current Value the Power Value and the Resistance Value Setup cceeseeeseeeeeeeeeeees 26 2 4 Programming Setting Interface eee 27 2 5 The Explanation to the Receiving Zone 28 Chapter 3 Maintenance and Service eee 29 3700 SERIES USER MANUAL CAUTION Before switching on the DC Electronic load the protective earth terminal of this instru ment must be connected to the protective conductor of the AC line power cord The AC line plug shall be inserted only in a socket outlet provided with a negated by the use of an extension cord or power cable without a protective grounding conductor SAFETY NOTES The following general safety precautions must be observed during all phases of operation service and repair of this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument The Manufacturer assumes no liability for the
10. ERSION 1 0 2003 1 8 3700 SERIES USER MANUAL ElectronicLoad Software Electronic Load is mainly to test the equipment to know how much voltage or current it can bear to reduce the accidents in which the machine may be burnt in case of not knowing the voltage and current of it and to ensure the use of some expensive machines 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 19 3700 SERIES USER MANUAL Chapter 1 System Installation 1 1 Installation 1 1 1 Put the CD ROM into the CDROM driver and select to setup ElectronicLoad Software The following initializing figure as in Fig 1 1 will be displayed Fig 1 1 The Initialization Interface of the Installation 1 1 2 The system entering the following interface press NEXT to continue Fig 1 2 Installation Interface 2 1 1 3 The system entering this interface if you don t want to continue to install you can click NO to exit the installation And if you want to continue click Yes button Fig 1 3 Installation Interface 3 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 20 3700 SERIES USER MANUAL 1 1 4 The system entering this interface enter some words or numbers idly in the Serial frame and click NEXT Fig 1 4 Installation Interface 4 1 1 5 The system entering this interface click Browse to select the installation folder And the defaulted folder is C
11. ON KEY LOCK EXIT It will exit the Menu operation at any procedure by press ESC button 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 10 3700 SERIES USER MANUAL The menu operation includes MAX CURRENT SET MAX POWER SET PROGRAM SET COMMUNICATION SET ADDRESS SET SAVE OPTION KEY LOCK Function We will descript the details as following 2 3 7 1 Set up the maximum current When you select the MAX CURRENT SET function the LCD will display You can set the current value by using the number keyboard or rotating the ROTARY button Then confirm the value by pressing OK button 2 3 7 2 Set up the maximum power When you select the MAX POWER SET function the LCD will display as You can set the power value by using the number keyboard or rotating the ROTARY button Then confirm the value by pressing OK button 2 3 7 3 Program Set When you select the PROGRAM SET the LCD will display as Users can set constant current constant power and constant resistance format by using the up and down key or the rotary button and then confirm it by pressing OK button The detail procedure of setting up is as following 1 Set a program to provide a constant Current Output 1 Select CURRENT OUT press OK to confirm 2 The LCD will display 3 Enter the step number if you wan to set 3 steps then enter 3 then press OK to confirm Please pay attention to the range of thi
12. Programmable DC Electronic Load 3700 SERIES user manual GAUTION i inc S cared Sir tecdh deat herat one Seat pauses es 1 SAFETY NOTES ma wai a an a 1 Chapter 1 General Introduction eects 2 1 1 General Introduction ccccccesesseeseeeteeseeseeesees 2 1 2 Specification nee 13 Features iccscon hea aea EE E EEEE 3 1 4 Dimension and Structure s ssseeseseeseeseseeseeereeeee 3 14 1 Dimension nresnain 3 VAD SUCHUIE ie oes beech e aa etd 4 1422 1 Prone VEW a aN aia eens 4 1 4272 Back VIEW er R ees 5 Chapter 2 Operation is ioeina 6 2 1 General Operation eee eseneeeeeeseteeeeteeeeees 6 2 2 Function Introduction 6 2 2 1 Main fUnctions ccccceesceseesceseeesseseeeseesseeseees 6 2 2 2 SUD fUNCTIONS ccccccesceseeseeeseeseeesseeeeeseeeseeseees 6 2 3 The Operation of the Functions 6 DQ Sel ES A E E E E teens har ceeesees aes aed 7 DBZ PSC cig oases E T E ETA iatdiina douse 8 2 323 EN A EAER E OE EE E 8 2 3 4 Store Data Function sssessessessoseesessessesseseeseeses 9 2 3 5 Recall Data FUunction ccccececcesseessesseeteeseeees 10 2 3 6 Switch ON OFF of power output 10 2 3 7 The function of the Menu cceeeeeeeeeeeeeees 2 3 7 1 Set up the Limit Current eee 2 3 7 2 Set up the Limit Power ia 2 3 7 3 PIOSTAM Set ayena a n 2 3 7 4 Set up the Communication ee 17 2 3 7 5 Set up Communication Address 0 254 17 2 3 7 6 Set up Locking Keyboard eee 18 2 3 7
13. ata repeatedly or once After the competition of the setup click the confirming button Enter to exit this interface Do not skip this step Do remember that the data don t send to the power supply at this time Return to the main interface and can the set data be sent aiii The button on the left is to send and read data and the button on the right is to stop reading data 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 27 3700 SERIES USER MANUAL 2 5 The Explanation to the Receiving Zone The Current Reading Read the Current Input Low a The red light means the output of is negative Conversely it is normal Ower Hot ia The red light means being over hot Conversely it is normal Cret Voliage a The red light means being over voltage Conversely it is normal Liver Powar e The red light means being over power Conversely it is normal 150 10 01i 2345678 8 100012 1314 pli 44567 8 9 WUD 11h Dynamically Running Diagram Dragging the mouse on the top can scan the data 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 28 3700 SERIES USER MANUAL Chapter 3 Maintenance and Service During the process of communication there may be the pause situation of the communication for the maladjustments And at this time the COM SETTING interface may be used Confirm the COM Port and Baud Rate of the previous page and then adjust the valu
14. customer s failure to comply with these requirements Ground the Instrument This product is provided with a protective earth terminal To minimize shock hazard the instrument chassis and cabinet mush be connected to an electrical ground The in strument must be connected to the AC Electronic Load mains through a three conductor power cable with the third wire firmly connected to an electrical ground safety ground at the power outlet For instruments designed to be hard wired to the AC power lines supply mains connect the protective earth terminal to a protective conductor before any other connection is made Any interruption of the protective grounding conductor or discon nection of the protective earth terminal will cause a potential shock hazard that could result in personal injury If the instrument is to be energized via an external autotransformer for voltage reduction be certain that the autotransformer common ter minal is connected to the neutral earthed pole of the AC power lines supply mains Keep Away From Live Circuits Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made by qualified service personnel Do not components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always disconnect power discharge circuits and remove external voltage sources before touching component
15. e DC Electronic Load 17 VERSION 1 0 2003 1 3700 SERIES USER MANUAL 2 3 7 6 Set up locking key board After you locked the keyboard you must enter the correct password to unlock it then you can use the number keys and the ROTARY button This function is for the safety of the using of electronic load When you select the KEY LOCK function the LCD will display as Users can enter 4 numbers or letters as the password by pressing the number button or by using and button or ROTARY button to change the number or ASCII number which will be your password and confirm the password by pressing Enter button 2 3 7 7 Set up SAVE OPTION This function is for saving the last set up of the current power and resistance It will save much time of users when the users will need the same setup value It will display the same current power and resistance value when the electronic load is powered on for every time When you select the SAVE OPTION function the LCD will display as Users can change the selection by using UP and DOWN keys or rotating the ROTARY button and confirm the selec tion by pressing OK button To select SAVE I P R means to save the last set up of current power and resis tance To select DON T SAVE means don t save the last set up voltage value 2 3 7 8 EXIT function When the EXIT function is selected you will exit the Menu operation 3700 Series Programmable DC Electronic Load 1 V
16. e for the first step Please pay attention to the range of this resistance value such as 100 so you should enter 100 then press OK to confirm and then the LCD will display 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 15 3700 SERIES USER MANUAL 6 At this time you need to enter a time value Please pay attention to the range of this time value is from 1 to 7200 seconds maximum is 7200 seconds such as 30 seconds so you should enter 30 then press OK to confirm and then LCD will display 7 At this time you need to enter a resistance value for the second step Pay attention the range of this value such as 200 so you should enter 200 then press OK to confirm and then LCD will display 8 At this time you need to enter a time value for the second step the range of this time value is from 1 to 7200 seconds such as 60 seconds so you should enter 60 then press OK to confirm and the LCD will display 9 At this time you need to enter a resistance value for third step such as 300 so you should enter 300 then press OK to confirm and then LCD will display 10 At this time you need to enter a time value for the third step such as 120 seconds so you should enter 120 then press OK to confirm and the LCD will display 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 16 3700 SERIES USER MANUAL 11 At this time if you select ONE TIME and p
17. e of OldAddr When the COM Setting Running interface is displayed this means that the last communi cation has used this address This is only being used when the set address has been forgotten Then set the NewAddr to this new address and click Write button to send At this time change the data of the OldAddr otherwise the Write will be no effective In the process of adjustment COM Port Setting Interface is still being the Com Setting This means the failure of communication Then the user can adjust the old address into zero and try it If the system runs normal when it is powered on The communication stops suddenly while the user is adjusting the Limit the current the power or the resistance At this time the user should open the COM Port Setting Interface turn the OldAdd to zero and do not save it Then you return to the main interface and click the running button and maybe the communication will be good Be sure that before changing the address the PC must be in charge of the lower machine the Load While the COM Port Setting Interface being open the old address is the address of the last communi cation Remembering it may be helpful 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 29
18. e output current at 3 12A 1 To set up by using number keyboard Step Press I set button Step2 Enter the password by using the number keyboard if the keyboard is unlocked please do step4 Step3 Press OK button if the password is wrong please do step2 for reentering Step4 Press 3 1 and 2 button to enter the voltage value Step5 Press I set button to confirm the voltage value 2 To set up by using Rotary SW 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 1 If the key board is unlocked by password directly rotate the Rotary SW button andvoltage will be continually changed from the previews value according the rotation At the beginning the cursor will be shown on the last number of the value which is indicated on the LCD you can move the cursor to the first number second number etc by using lt and gt buttons and then rotate to change each num ber and let it stay at 3 12 A Please see the following figures Then press I set to confirm the value 3700 SERIES USER MANUAL 2 If the keyboard is locked by password Step1 Press V set button Step2 Enter the password by using the number keyboard Step3 Press Enter button if the password is wrong please do step2 for reentering Step4 Rotate the Rotary SW button to change the value the operation is as the same as item 1 Step5 Press I set
19. just put the mouse on the red point of the relative rotary and rotate But the rotary just set the value roughly And if the values need to be set accuracy the keyboard needs to be used Fig 3 4 2 Setup the Current Power and Resistance Using the Keyboard 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 26 3700 SERIES USER MANUAL If a parameter needs to be set click the Set button relative to the parameter setup and then click the Enter key to send Explanation to the buttons of the keyboard A set Click it before the current is set and then setup 0 30A P set Click it before the power is set and then setup 0 150W R set Click it before the resistance is set and then setup 0 150 A P R represents the max value of each parameter 30A 150W 150i 2 4 Programming Setting Interface Click the button on the top in the main interface mt inen the following diagram will be displayed Fig 2 5 Program Setting Interface On the above the date can only be set once by Rotary and keyboard Otherwise ten sets of data can be set by this interface After set the item ElectronicLoadSetting and make clear to set the current the power or the resistance the other can be set It is not needed to set 10 steps ReadParam Step is to set the step number for you to read the set parameter The value cannot be larger than the data step number you set ReadParam State is to set the reading mode of the d
20. n press OK to confirm and the LCD will display 11 At this time if you select ONE TIME and press OK to confirm then the constant current will be provided by this load at the following schedule Step 1 1A for 2 seconds Step 2 2A for 5 seconds Step 3 3A for 10 seconds If you select REPEAT and press OK to confirm then the constant currents schedule as the above will be provided repeatedly 2 Set a program to provide a constant Power Output 1 Select POWER OUT press OK to confirm 2 The LCD will display 3 Enter the step number if you wan to set 3 steps then enter 3 then press OK to confirm Please pay attention to the range of this value is from 1 to 11 Maximum is 11 steps 4 The LCD will display 5 You need to enter a power value for the first step Please pay attention to the range of this power value such as 50W so you should enter 50 then press OK to confirm and then the LCD will display 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 13 3700 SERIES USER MANUAL 6 At this time you need to enter a time value Please pay attention to the range of this time value is from 1 to 7200 seconds maximum is 7200 seconds such as 30 seconds so you should enter 30 then press OK to confirm and then LCD will display 7 At this time you need to enter a power value for the second step Pay attention to the range of this power value such as 100W so you should enter 10
21. ress OK to confirm then the constant power will be provided by this load at the following schedule Step 1 100 for 30 seconds Step 2 200 for 60 seconds Step 3 300 for 120 seconds If you select REPEAT and press OK to confirm then the constant currents schedule as the above will be provided repeatedly 2 3 7 4 Set up the communication This function is for monitoring the output data of the electronic load by using a computer When you select COMMUNICATION SET function the LCD will display as Users can change the communication setup by using UP and DOWN keys or rotating the ROTARY button and confirm the value by pressing OK button BUAD RATE 4800 represent BUAD rate 4800bps BUAD RATE 9600 represent BUAD rate 9600bps BUAD RATE 19200 represent BUAD rate 19200bps BUAD RATE 38400 represent BUAD rate 38400bps 2 3 7 5 Set up communication address 0 254 This communication address function is for monitoring multi electronic load system In the system one computer can monitor 255 DC electronic load at the most by the connecting RS232 and 485 bus So we should give each electronic load an address When you select ADDRESS SET function the LCD will display as Users can change the communication address value by using UP and DOWN keys or rotating the ROTARY but ton and confirm the value by pressing Enter button The range of the address value is from 0 to 254 3700 Series Programmabl
22. s Do Not Substitute Parts or Modify Instrument Because of the danger of introduction additional hazards do not install substitute parts or perform any unauthorized modification to the instrument Return the instrument to a qualified dealer for service and repair to ensure that safety features are main tained 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 1 3700 SERIES USER MANUAL Chapter 1 General Introduction 1 1 General Introduction 3700 Series Programmable DC Electronic Load is a kind of mini size DC programmable electronic load with nice appearance Also it is equipped with back light LCD display number keypad and rotary code switch which let it much easier to use Voltage current and power can all be displayed on the LCD or computer and tableau is distinct and clear It can be operated at con stant current mode constant resistance mode and constant power mode It is an essential in strument for scientific research education laboratory test service and so on institutions 1 2 Specification Input quantity 1 DC 0 360V DC 0 360V 0 300 0 000 3 999 0 2 3mV 4 00 35 999 0 2 30mV 36 0 360 0V 0 3 300mV 0 000 2 999 0 2 3mA 3 00 30 00 0 2 30mA Over voltage over current over power over heat polarity reversing connection AC 110 220 available 60 50HZ Software users manual AC power cable handlebars Communication cable for RS232 Purchase Option Parts Communication cable for RS485
23. s value is from 1 to 11 Maximum is 11 steps 3700 Series Programmable DC Electronic Load 11 VERSION 1 0 2003 1 3700 SERIES USER MANUAL 4 The LCD will display 5 You need to enter a current value for the first step Please pay attention to the range of this value of this type DC Load such as 1 A so you should enter 1 then press OK to confirm and then the LCD will display 6 At this time you need to enter a time value Please pay attention to the range of this time value is from 1 to 7200 seconds maximum is 7200 seconds such as 2 seconds so you should enter 2 then press OK to confirm and then LCD will display 7 At this time you need to enter a current for the second step Please pay attention to the range of this current value such as 2A so you should enter 2 then press OK to confirm and then LCD will display 8 At this time you need to enter a time value for the second step the range of this time value is from 1 to 7200 seconds such as 5 seconds so you should enter 5 then press OK to confirm and the LCD will display 9 At this time you need to enter a current for third step such as 3A so you should enter 3 then press OK to confirm and then LCD will display 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 12 3700 SERIES USER MANUAL 10 At this time you need to enter a time value for the third step such as 10 seconds so you should enter 10 the
24. two lights may be on at the same time And it is possible that one of them is on or neither of them is on That the PC Self light is on means the PC is in the charge of the Electronic Load Conversely it is in charge of its panel That the Power State light is on means the power of the Electronic Load is on Conversely it is off Before exiting the run program the control of the Electronic Load must be reurned to the machine itself and it must confirmed that the power is off The functions of the seven buttons in the up are as follows Run Run the Program Pause Stop Running COM Setting COM Port Set Program Setting Program Set Send Data Send Data Stop Send Stop Sending Data Close Stop Communication 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 23 3700 SERIES USER MANUAL 1 3 Uninstall the System It will be OK to select Uninstall Elect from the system start menu Remember to close the system before uninstalling otherwise it will be no way to run the command 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 24 3700 SERIES USER MANUAL Chapter 2 Functions Introduction 2 1 COM Port Set Interface Notes Do remember to be sure that the control of the Load is in the PC when setting a ECA Fig 2 1 COM Port Setting Interface The system entering this interface please confirm the COM and the Baud Rate And at
25. value and then press the R set button for confirmation ENTER PASWORD SET RISIS 200 0 NEW _ 50 0 It will exit the setting up current operation at any procedure by press ESC button 2 3 4 Store data function To users this is a good function for ease using If you want to use current output resistance output and power output schedule as following in one hour you can edit a program as the require ment and then store it in the memory of 3700 Series DC electronic load as a number When you need it just recall it 11 20 minute 10A 21 30 minute 15A 31 45 minute 10A The store operation always be done after editing a program schedule for current output resis tance output and power output the operation is as following Press Store button Enter the set value for store number from 1 to 10 by using the number key or rotate the rotary button to change the set value number for store Press Store button to confirm the set value if the number is out of the range from 1 to 10 it will retune to Step 2 for reenter sea A xk STORE 1 STORE It will exit the store operation at any procedure by press ESC button 3700 Series Programmable DC Electronic Load VERSION 1 0 2003 1 3700 SERIES USER MANUAL 2 3 5 Recall data function In the last paragraph we know that we can store 10 programs of the electronic load in the memory Also you can recall any one program from the stored
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