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53 

Toggle 

In toggle mode, the electronic load will switch between A level and B level when receiving a trigger 
signal after the transient operation is enabled. The following picture shows the current waveform 
in toggle transient operation. 
 

 

Figure 27 - Toggle Transient Operation 

 

Setting Up A/B Transient Operation 

The following is a short tutorial of how to set up A/B transient operation for your electronic load. 
In this example, we will set up rise speed at 1 A/us and fall speed at 2 A/us. The electronic load will 
be in continuous transient mode and switch between 10 A and 2 A in durations of 0.002 s and 
0.003 s respectively. 
 

 
Note :  When setting up steps, make sure all transient level, slew, and width parameters are 
within the modules’ specified limits. 
 

 
 
 
 
 
 
 
 

Содержание MDL Series

Страница 1: ...MDL Series Programmable DC Electronic Load Models MDL001 MDL002 MDL200 MDL252 MDL302 MDL305 MDL400 MDL505 MDL600 USER MANUAL...

Страница 2: ...e earth terminal To minimize shock hazard the instrument chassis and cover must be connected to an electrical ground The instrument must be connected to the AC mains power through a grounded power cab...

Страница 3: ...s a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicate...

Страница 4: ...ictions adopting that Directive is marked as being put on the market after August 13 2005 and should not be disposed of as unsorted municipal waste Please utilize your local WEEE collection facilities...

Страница 5: ...ature Protection OTP 15 Reverse Voltage Protection LRV RRV 15 Menu List 16 Setup Menu 16 Configuration Menu 19 Automatic Test Menu 20 Installation 21 Inspection 21 Cleaning 21 Installing Modules 22 Ch...

Страница 6: ...de 42 Setting CV CC CR CW CZ Mode 44 Local Operation 45 Mainframe Panel 45 Module Panel 48 Module Panel Lock 49 Switching Channels 49 Channel Synchronization 49 VFD Indicator Function Description 50 T...

Страница 7: ...utomatic Test 66 Setting Up Test Files 66 Recall Test Files 71 Remote Operation 71 USB Interface 72 Ethernet Interface 72 GPIB Interface 72 RS 232 Interface 73 RS 232 Data Format 73 Baud Rate 73 Parit...

Страница 8: ...and photovoltaic arrays Up to four modules can be installed into the MDL001 mainframe to support up to a total of 8 channels Adding the MDL002 mainframe extension will enable the system to support fo...

Страница 9: ...Synchronous load on off function 16 bit voltage and current metering providing high resolution of 0 1 mV and 0 01 mA Transient mode up to 25 kHz List mode sequence mode minimum 20 us step width with 8...

Страница 10: ...ls on the use of these keys 3 ADJUSTMENT KNOB Used to change parameters 4 MAINFRAME FUNCTION KEYS Controls each channel s operating status Refer to Mainframe section for more details on the use of the...

Страница 11: ...ternal input control terminal 4 Current monitoring output 5 Digital I O and VF output terminal 6 Extended module interface 7 AC Power input socket 8 USB interface 9 Line voltage selection switch 110V...

Страница 12: ...panel will output TTL high voltage level You can control the output state of the power supply under test via this pin see Figure 31 Operations to Clear the OVP State Check whether the input voltage is...

Страница 13: ...select Alimit Delay and press Enter Input delay time before alarm and press Enter to confirm Current Limit Delay 3S 7 Press Esc key to exit menus If the electronic load s current value is above the se...

Страница 14: ...2 Press Shift to enter Configuration menu Sync On Set Von Meter Protect List Ext Ctrl Set About Exit 3 Press key to select Protect and press Enter to go into protection menu Max Power Set Alimit Stat...

Страница 15: ...P State When the electronic load temperature has dropped below the protection point press any key on the front panel or remotely send command PROTection CLEar The OTP displayed on the front panel will...

Страница 16: ...Load works in CZ mode CC CV RANGE Switch the range HIGH RANGE Set high range LOW RANGE Set low range I V R W SET Set the working current voltage resistance power value Vmax Amax Set up the maximum vol...

Страница 17: ...ode setting UPDATE DEF Real time update OLD No update when turning load ON OFF original value before use of rotary knob will be set TRIGGER SOUR Set up the trigger mode MANUAL DEF Manual trigger EXTER...

Страница 18: ...gs GATEWAY SET Gateway setting IP SET IP setting MASK SET Mask setting PORT SET Port setting EXIT EXPAND MODULE Module expansion ON Enable the function OFF DEFAULT Disable the function LANGUAGE SET Co...

Страница 19: ...this function PROTECT Load protecting function MAX POWER SET Set up hardware power protection state ALIMIT STATE Set up software current protection state ON Turn on software current protection state...

Страница 20: ...trol function REM SENSE SET Remote sense function ON Enable remote sense function OFF DEFAULT Disable remote sense function ABOUT Module production information MDL Channel production model SN Channel...

Страница 21: ...ided with each mainframe or module Mainframes include Power cord User manual Mainframe extension cable accessory MDL002 only Modules include Certificate of calibration and test report Optional accesso...

Страница 22: ...r This also applies to the MDL002 mainframe extension allowing a maximum of 4800 W total when connecting the MDL001 and MDL002 together The procedure of installing modules to the mainframe extension i...

Страница 23: ...23 Figure 3b Module Installation 4 Insert and slide the selected modules into the slot Figure 3c Module Installation 5 Insert and tighten module screws on rear panel...

Страница 24: ...ft With the MDL001 mainframe the total number of channels is 8 Channels 1 and 2 are next to the mainframe front panel while channels 7 and 8 are located on the left side Load channel number is fixed e...

Страница 25: ...on module channels are numbered 11 18 Location The operating temperature of the MDL Series DC Electronic Load is 0 to 40 A fan cools the electronic load by drawing air through both the top and front a...

Страница 26: ...ard 19 inch rackmount shelf Rack mount kit IT E153A is available for use with mainframe MDL001 and mainframe extension MDL002 When mounted there is no need to remove the bottom studs CAUTION Do not bl...

Страница 27: ...an input line voltage switch on the rear refer to Figure 9 If the indicated line voltage does not match your region please use the switch in the back of the unit to choose your input line voltage ins...

Страница 28: ...ELF TEST System self check CH1 2 3 4 5 6 7 8 SCAN 7 5 3 1 Detecting all installed modules e g CH01 CV OFF Vdc 0 0000V Adc 0 0000A Wdc 0 00W Displays information of channel 1 or the leftmost channel Us...

Страница 29: ...2 Verify the power line voltage setting The line voltage is set to the proper value for your country 110VAC or 220VAC when the electronic load is shipped from factory Change the line voltage setting i...

Страница 30: ...output terminals of the load and cover it after completing the connection Please pay attention to the type length and polarity when wiring Avoid using wires of minimum specification of heating which...

Страница 31: ...is more than 30 A Refer to Figure 11 Connection of Load and Device Under Test DUT for double terminal connection Remote Sense Connection If the lead length is relatively long there will be a voltage...

Страница 32: ...nnector must be higher than the negative terminal Parallel Connection Parallel connection can be applied between modules of the same model to increase current and power dissipation but it cannot be ap...

Страница 33: ...connections Figure 14 Mainframe Rear Panel 8 pin Control Connector Table 2 Control Connector Pinout Pin Signal Description 1 Trigger IN Trigger Signal Input 2 Trigger OUT Trigger Signal Output 3 ON OF...

Страница 34: ...making contact with a TTL pulse source it produces a trigger to change the setting value voltage current resistance etc e g switch in transient mode or create a pulse in dynamic pulse mode At the sam...

Страница 35: ...channel is set to ON and the channel s input state is ON pin 4 outputs a low TTL level signal If the input state is off pin 4 outputs a high TTL level signal Mainframe Extension Connection Figure 15...

Страница 36: ...ows how to connect the RS 232 cable between the electronic load and PC Procedure 1 Connect RS 232 cable 2 Power on the electronic load 3 Select channel number via keys 4 Enter System menu by pressing...

Страница 37: ...e programmed value regardless of the input voltage Figure 16 Constant Current Mode Ranges When working in CC mode you can press the Setup key to enter the RANGE menu Two overlapping ranges can be sele...

Страница 38: ...e Transient Current Level A B transient current level can be set on the front panel or by remote operation The load can continuously toggle between the two levels when transient operation is turned on...

Страница 39: ...his reason the firmware allows the user to program slew rate values outside of the specified slew rate ranges The minimum transition time for all programmable slew rates is also limited in cases where...

Страница 40: ...to PASS upon completion If the DUT operates outside the configured values the test will FAIL upon completion Note These parameters are used for Automatic Test ONLY Voltage Level Set the voltage level...

Страница 41: ...for the test to PASS upon completion If the DUT operates outside the configured values the test will FAIL upon completion Note These parameters are used for Automatic Test ONLY Immediate Resistance Le...

Страница 42: ...PASS upon completion If the DUT operates outside the configured values the test will FAIL upon completion Note These parameters are used for Automatic Test ONLY Immediate power level Set the power le...

Страница 43: ...SS upon completion If the DUT operates outside the configured values the test will FAIL upon completion Note These parameters are used for Automatic Test ONLY Immediate Impedance level Set the impedan...

Страница 44: ...to select Range selection menu Press Enter key to enter the Range selection menu and press key to choose Low Range or High Range Press Enter key to confirm CH01 HIGH RANGE LOW RANGE 5 Press key to se...

Страница 45: ...oltage or current via the front panel keys When the load is repowered on the mainframe will scan all the installed modules once again and can recall the parameters from the last time it was powered of...

Страница 46: ...o enter the specific channel s menu For example pressing this key allows you to set up A B transient mode and CC CV CR CW CZ mode For more details view the Menu List section On Off This key is used to...

Страница 47: ...her menus and functions Shift System Press this key combination to enter the System menu Shift Config Press this key combination to enter the Configuration menu Shift Program Press this key combinatio...

Страница 48: ...ch A B transient preset value L R dual channel modules Switch the left right channels Press this key rotary knob to control the two channels Short Used for short testing This allows the load to simula...

Страница 49: ...switch channels 1 Press Chan number key 2 Press Chan key 3 Press the number key of the channel in SETUP menu Channel Synchronization If you want to change the synchronization of the channels you can...

Страница 50: ...s the module s operating mode VFD display screen shows four lines of numbers The first line shows the measured voltage value The second line shows the measured current value The third line shows the m...

Страница 51: ...is similar to continuous mode except that the transient points are controlled by explicit triggers instead of an internal transient generator Continuous In this mode the electronic load generates a re...

Страница 52: ...you can set A B level A B width and A B slew rate via the mainframe keypad The electronic load will automatically switch to A level after maintaining A width time Then it will switch to B level The e...

Страница 53: ...Setting Up A B Transient Operation The following is a short tutorial of how to set up A B transient operation for your electronic load In this example we will set up rise speed at 1 A us and fall spe...

Страница 54: ...confirm CH01 Rise Speed Set 1 00A Us 6 Press key to select the fall slope setting and press Enter For 2A us input 2 and press Enter to confirm CH01 Fall Speed Set 2 00A Us 7 Press key to select A leve...

Страница 55: ...put CH01 CC ON Vdc 0 0000V Adc 0 0000A Wdc 0 00W 16 Press Tran key on channel 1 module to enable transient operation 17 Press Trig key on mainframe panel to trigger transient operation Transient Opera...

Страница 56: ...The list file can be saved in non volatile memory where it can be quickly recalled Users can edit up to 7 groups of List files in CC mode only In List operation mode the electronic load begins to enab...

Страница 57: ...ss Enter FUNCTION MODE RECALL LIST EDIT LIST EXIT 6 Press key to select high range or low range and press Enter to confirm High Range Low Range 7 Input number of steps in List Input value and press En...

Страница 58: ...r to confirm Repeat Count 1 16 Select memory position to save list file Input value and press Enter to confirm CH01 Save list file 1 17 Press key to select Function Mode and press Enter Select List an...

Страница 59: ...LIST SLEW 1 2 Sets List step 1 slew rate LIST WIDTH 1 1 Sets List step 1 width LIST LEVEL 2 1 Sets List step 2 level LIST SLEW 2 2 Sets List step 2 slew rate LIST WIDTH 2 2 Sets List step 2 width LIST...

Страница 60: ...cation port 4 Bus trigger When bus trigger is set the load will enable a trigger operation as soon as the load receives the trigger command GET or TRG 5 Timer trigger When timer trigger is set the mai...

Страница 61: ...tate for the electronic load When the input voltage exceeds the Von voltage value the electronic load s input state turns on This function can protect a DUT when its voltage goes below a specified lev...

Страница 62: ...Working Range Setting Up Von Function The following is a quick tutorial of how to set up the Von function for your electronic load In this example we will set the Channel 1 Von point to 5 V and enable...

Страница 63: ...able Von LATCH function Save and Recall Operation The stored settings of all channels can be recalled The stored parameters include operation mode voltage current values slew rate transient setting an...

Страница 64: ...Group number Recall Group 0 2 Input the Group number 0 100 you previously saved your parameters to and press Enter key to recall Recall Group 9 Module Controlling Link There is an 8 pin terminal and c...

Страница 65: ...under OVP or reverse protection condition pin 2 VF will output a high level signal Current Monitoring The current monitoring terminal will output 0 10 V analog signal accordingly to 0 full range of t...

Страница 66: ...ctronic load to regulate the input current of the electronic load 10 V indicates the full range of electronic load s current rating Automatic Test The automatic test function of the MDL Series electro...

Страница 67: ...nce 1 2 3 4 5 6 7 8 9 10 Save Group 41 42 43 44 45 46 47 48 49 50 PROGRAM 6 Sequence 1 2 3 4 5 6 7 8 9 10 Save Group 51 52 53 54 55 56 57 58 59 60 PROGRAM 7 Sequence 1 2 3 4 5 6 7 8 9 10 Save Group 61...

Страница 68: ...of testing voltage In this example the first step is 5 8V Press and then Enter to confirm Voltage Upper Limit 5 800V 6 Press key to move the cursor to Vmin 0 000V and press Enter to set the lower limi...

Страница 69: ...e steps needed to test For example if you want to test 4 steps press 1 2 3 4 0 stands for the tenth step If you want to cancel a step press the number key again to cancel Press Enter to confirm your s...

Страница 70: ...s Press keys to select condition and press Enter to confirm Stop Condition Complete Failure 23 Program chain is used when you need to link to the next file to be tested For example if you need to link...

Страница 71: ...er and press Enter to recall the saved testing file Program Select NO 1 3 To run the program press key to select Run Program and press Enter PROG 01 Stop Result 4 Press Start key to start automatic te...

Страница 72: ...The device is SR1 capable The device is RL1 capable The device is DT1 capable Ethernet Interface Use a network cable to connect PC through Ethernet interface of the electronic load Press Shift on the...

Страница 73: ...nnected to another DTE such as a PC COM port through a null modem cable NOTE The RS 232 settings in your program must match the settings specified in the front panel System menu Press Shift on the fro...

Страница 74: ...stop sending characters until the electronic load issues the X ON which it will do once its input buffer has dropped below half full The electronic load recognizes X_ON and X_OFF sent from the contro...

Страница 75: ...cables or adapters must be used as described under the RS 232 connector Note that even if the cable has the proper connectors for your system the internal wiring may be incorrect The interface cable...

Страница 76: ...A 5 4 V at 30 A 1 8 V at 120 A CV Mode Range Low 0 18 V High 0 80 V 0 80 V 0 80 V 0 500 V 0 80 V 0 500 V 0 80 V Resolution Low 1 mV High 10 mV Accuracy Low 0 05 0 02 FS 0 05 0 025 FS 0 05 0 02 FS High...

Страница 77: ...2 5 A us Accuracy within 40 of programmed value Measurement Readback voltage Range Low 0 18 V 0 18 V 0 18 V 0 18 V 0 18 V 0 18 V 0 18 V High 0 80 V 0 80 V 0 80 V 0 500 V 0 80 V 0 500 V 0 80 V Resolut...

Страница 78: ...vironmental limits are as follows Operating temperature 0 to 40 C Storage temperature 10 to 60 C Humidity Indoor use 95 Dimensions and weight Model Type Dimensions W x H x D Weight MDL001 Mainframe 44...

Страница 79: ...ds 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 ch...

Страница 80: ...instrument via our website at www bkprecision com 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 warra...

Страница 81: ...22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 2015 B K Precision Corp Printed in China v011315...

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