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Summary of Contents for BK Precision MDL4U Series
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Page 2: Table Of Contents
Contents Compliance Information EMC ................5 IEC Measurement Category &... - Page 3 PC Control Connection ............Operations Operation Modes .
- Page 4 6.16 Remote Operation ............. . . 6.16.1 USB Interface .
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Page 5: Emc
Compliance Information 1.1 EMC EC Declaration of Conformity - EMC Compliance was demonstrated to the following specifications listed in the Official Journal of the European Communities: EMC Directive 2014/30/EU. EN 61010-1:2010 Safety requirements for electrical equipment for measurement, control, and laboratory use Part 1: General requirements... -
Page 6: Iec Measurement Category & Pollution Degree Definitions
Compliance Information 1.2 IEC Measurement Category & Pollution Degree Definitions Measurement Category (CAT) - classification of testing and measuring circuits according to the types of mains circuits to which they are intended to be connected. Measurement Category other than II, III, or IV : circuits that are not directly connected to the mains supply. -
Page 7: Product End-Of-Life Handling
Compliance Information 1.3 Product End-of-Life Handling The equipment may contain substances that could be harmful to the environment or human health if improperly handled at the product’s end of life. To avoid release of such substances into the environment and to reduce the use of natural resources, we encourage you to recycle this product to an appropriate system that will ensure that most of the materials are reused or recycled appropriately. - Page 8 Compliance Information Symbols - HIGH VOLTAGE - possibility of electric shock. WARNING – Statements or instructions that must be consulted in CAUTION order to find out the nature of the potential hazard and any actions which must be taken. On (Supply). This is the AC mains connect/disconnect switch on the front of the instrument.
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Page 9: Electrical Power
Safety Notices The following safety precautions apply to both operating and maintenance personnel and must be followed during all phases of operation, service, and repair of this instrument. Before applying power to this instrument: • Read and understand the safety and operational information in this manual. •... - Page 10 Safety Notices Ground the Instrument To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical safety ground. This instrument is grounded through the ground conductor of the supplied, three- conductor AC line power cable. The power cable must be plugged into an approved three-conductor electrical outlet.
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Page 11: Environmental Conditions
Safety Notices Environmental Conditions This instrument is intended to be used in an indoor pollution degree 2 environment. The operating temperature range is 0 C to 40 C and 20% to 80% relative humidity, with no condensation allowed. ∘ ∘ Measurements made by this instrument may be outside specifications if the instrument is used in non- office-type environments. - Page 12 Safety Notices Do not operate instrument if damaged If the instrument is damaged, appears to be damaged, or if any liquid, chemical, or other material gets on or inside the instrument, remove the instrument’s power cord, remove the instrument from service, label it as not to be operated, and return the instrument to B&K Precision for repair.
- Page 13 Safety Notices Do not touch live circuits Instrument covers must not be removed by operating personnel. Component replacement and internal adjustments must be made by qualified service-trained maintenance personnel who are aware of the hazards involved when the instrument’s covers and shields are removed.
- Page 14 Safety Notices Servicing Do not substitute parts that are not approved by B&K Precision or modify this instrument. Return the instrument to B&K Precision for service and repair to ensure that safety and performance features are maintained. Fuse replacement must be done by qualified service-trained maintenance personnel who are aware of the instrument’s fuse requirements and safe replacement procedures.
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Page 15: Introduction
Introduction 3.1 Product Overview Figure 3.1 MDL4U/MDL4UB Series The MDL4U/MDL4B Series is a multi-channel modular programmable electronic load system, offering seven(MDL4U)/nine(MDL4UB) module options with power capacities ranging from 150 W to 600 W to test various power sources, including multi-output DC power supplies, batteries, fuel cells, and photovoltaic arrays. - Page 16 Introduction Model MDL4U200 MDL4U252 MDL4U302 MDL4U305 MDL4U400 MDL4U505 MDL4U600 Power 200 W *250 W / 50 W *300 W / 300 W 300 W 400 W 500 W 500 W Operating Voltage 80 V 80 V 80 V 500 V 80 V 500 V 80 V...
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Page 17: Features
Introduction 3.2 Features • Power range: up to 2400 W • Voltage range: up to 600 V • Current range: up to 120 A • Operating modes: CC, CV, CR, CW • Removable modules for system configurability • Supports up to 16 channels with dual-channel modules •... -
Page 18: Front Panel
Introduction 3.4 Front Panel Figure 3.2 MDL4U Front Panel Item Name Description VFD Display Displays electronic load information. Module Panel Keys Controls module functions. Refer to Module section for more details. Rotary Knob Used to change parameters. Mainframe Function Keys Controls each channel’s operating status. - Page 19 Introduction Figure 3.3 MDL4UB Front Panel Item Name Description VFD Display Displays electronic load information. Module Panel Keys Controls module functions. Refer to Module section for more details. Rotary Knob Used to change parameters. Mainframe Function Keys Controls each channel’s operating status. Refer to Mainframe for more details. Mainframe Numeric Keypad Used to enter precise values when adjusting parameters.
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Page 20: Rear Panel
Introduction 3.5 Rear Panel Figure 3.4 MDL4U Rear Panel Item Name Description RS232 Interface Serial COM interface (DB9) used for remote of the unit. Not Used For factory use only. GPIB Interface GPIB interface used for remote control of the unit. Module Input Terminal Load input termianls. - Page 21 Introduction Figure 3.5 MDL4UB Rear Panel Item Name Description RS232 Interface Serial COM interface (DB9) used for remote of the unit. Not Used For factory use only. GPIB Interface GPIB interface used for remote control of the unit. Module Input Terminal Load input termianls.
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Page 22: Protection Functions
Introduction 3.6 Protection Functions The electronic load has the following protection functions: Overvoltage protection (OVP), overcurrent protection (OCP), overpower protection (OPP), overtemperature protection (OTP), and local and remote reverse voltage protection (LRV/RRV). The mainframe will act appropriately once any of the above protections are active. You can press any button on the front panel to restore the protection function. -
Page 23: Overcurrent Protection (Ocp)
Introduction 3.6.3 Overcurrent Protection (OCP) The electronic load includes both hardware and software overcurrent protection features. Hardware OCP - The electronic load’s maximum input current will be limited to approximately 110% of the current range. Once the hardware OCP is triggered, the status register’s OC bit will be set. When the hardware OCP is removed, the status register’s OC bit will be reset. -
Page 24: Overpower Protection (Opp)
Introduction 3.6.4 Overpower Protection (OPP) The electronic load includes both hardware and software OPP features. Hardware OPP – In the event that the electronic load’s input power exceeds the set power protection limit, the hardware OPP will limit the power. Once the hardware OPP is triggered, the status register’s OP bit will be set. -
Page 25: Overtemperature Protection (Otp)
Introduction 3.6.5 Overtemperature Protection (OTP) Each module has an overtemperature protection circuit, which will turn off the input if the internal temperature exceeds safe limits. When the electronic load’s internal circuit temperature is over 85°C, the load will enable OTP. Input will automatically be turned off and the VFD will display OTP. At the same time the OT and PS bits in the status register will be set and remain until they are reset. -
Page 26: Menu List
Introduction 3.7 Menu List The following menus can be viewed on the VFD display. Use the keys to scroll through the menu list. Press the Enter key to enter the selected menu function. Use the keys to scroll through the VFD screen and press Enter key to enter its submenu. Press Esc to go back to the previous menu selection. -
Page 27: System Menu
Introduction System Menu Press to enter the System menu. MENU INITIALIZE INITIALIZE DEFAULT SET Resume all configuration to default settings POWER ON SET RST (DEFAULT) Set the load’s input state to default at power on SAV0 Set the load’s input state to SAV0 at power on BUZZER SET Set up the buzzer state Enable the function... - Page 28 Introduction System Menu Cont... RS232 SET BAUDRATE SET Set up the communication baud rate 4800 (DEFAULT) 9600 19200 38400 57600 115200 PARITY SET Set up the communication parity NONE (DEFAULT) EVEN HANDSHAKE SET Select the handshake protocol NONE (DEFAULT) CTS/RTS XON/XOFF GPIB ADDRESS GPIB address setting...
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Page 29: Configuration Menu
Introduction Configuration Menu Press to enter the Configuration menu. Configuration Menu SYNC ON SET Setup Synchronization ON / OFF function ON (DEFAULT) Turn on synchronization function Turn off synchronization function VON POINT Set the load’s Von point VON LATCH Von latch state ON (DEFAULT) Turn on Von latch Turn off Von latch... - Page 30 Introduction Configuration Menu Cont... LIST FUNCTION MODE Select mode FIXED Choose fixed operation mode LIST Choose list operation mode RECALL LIST Recall list operation file EDIT LIST Edit list operation file HIGH RANGE Edit high range of list operation LOW RANGE Edit low range of list operation EXT.
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Page 31: Installation
Installation 4.1 Inspection This instrument was carefully inspected before shipment. Upon receipt, inspect the instrument for damage that might have occurred during transit. If any sign of damage is found, please notify your B&K Precision distributor. The following standard and optional accessories are provided with each mainframe or module. Mainframes include: •... -
Page 32: Installing Modules
Installation 4.3 Installing Modules Static electricity may damage load modules. Please install modules according to standard electrostatic prevention. Avoid touching joints and circuit boards. Any combination of modules up to 2400 W total in the MDL4U001 mainframe in any order. This also applies to the MDL4U002 mainframe extension, allowing a maximum of 4800 W total when connecting the MDL4U001 and MDL4U002 together. - Page 33 Installation Figure 4.2 Removing Rear Cover Screws Figure 4.3 Module Installation 6. Install more modules in other slots following the same process (stes 2 through 5). 7. Reconnect the power cord.
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Page 34: Channel Number
Installation Figure 4.4 Tighten Module Rear Screws 4.4 Channel Number The channel number for all modules is determined by the location of the modules in relation to the mainframe and ordered from right to left. With the MDL4U001 mainframe, the total number of channels is 8. -
Page 35: Location
Figure 4.7 Single and Dual Channel Modules Numbering 4.5 Location The operating temperature of the MDL4U Series DC Electronic Load is 0 to 40 ℃. A fan cools the electronic load by drawing air through both the top and front, and then exhausting it out the back. -
Page 36: Input Voltage Selection
Installation 4.6 Input Voltage Selection The electronic load can work under 110/220V±10% AC input, identified by an input line voltage switch on the rear (refer to Figure 4.8). 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, install appropriate fuse (refer to Table below), and then insert power cord. -
Page 37: Turn-On Checkout
Installation 4.7 Turn-On Checkout When you turn on the electronic load, the front-panel display will light up briefly while the electronic load performs its power-on self-test. The following table shows the procedure of the self-test. Mainframe VFD Display Description BIOS Ver 1.20 VFD displays software version SYSTEM SELF TEST System self-check... - Page 38 Installation Product Fuse specification (110 VAC) Fuse Specification (220 VAC) MDL4U001 T5A, 250 V T2.5A, 250 V MDL4U002 T5A, 250V T2.5A, 250 V Table 4.2 Fuse Specifications 4. Replace fuse. Use a flat-bladed screwdriver to open the small plastic cover under the AC input connector on the rear panel of the load and then replace with matching fuse.
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Page 39: Load Connection
Load Connection Parallel Connection ............. . Mainframe 8-pin Control Connector . - Page 40 Load Connection Generally speaking, if the wires are short enough, they can control a voltage drop of less than 0.5 V. In addition, bonding them together can reduce induction and noise. Connect wire from positive terminal of module to positive terminal of device. Similarly, connect the corresponding negative terminal. Figure illustrates a typical connection of the module with the device to be measured.
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Page 41: Parallel Connection
Load Connection 5.1 Parallel Connection Parallel connection can be applied between modules of the same model to increase current and power dissipation, but it cannot be applied between different modules. Modules can be paralleled in CC, CR, or CW mode, but cannot be paralleled in CV mode. Each module will dissipate the power it has been programmed at. -
Page 42: Mainframe 8-Pin Control Connector
Load Connection 5.2 Mainframe 8-pin Control Connector The mainframe’s 8-pin control terminal on the rear panel is shown below. This is used for external trigger and ON/OFF control connections. Figure 5.3 Mainframe Rear Panel 8-pin Control Connnector Signal Description Trigger IN Trigger Signal Input Trigger OUT Trigger Signal Output... -
Page 43: External Trigger Connections
Load Connection 5.3 External Trigger Connections There is five kinds of trigger modes.To set the trigger mode: 1. Press the ( ) to enter the System menu. 2. Press the navigation keys to select Trigger Source. 3. Press the navigation keys to select the desired trigger mode. 5.3.1 Trigger Modes Manual Trigger Mode To use the front panel trigger mode, set the trigger source to MANUAL. -
Page 44: External On/Off Control Connection
Load Connection Bus Trigger Mode To use BUS trigger mode, set the trigger source to BUS. Connect the electronic load by GPIB, USB, or Ethernet communication interface. When the TRIG command is received, the load will produce a trigger signal. Timer Trigger Mode To use timer trigger mode, set the trigger source to TIMER. -
Page 45: Mainframe Extension Connection
Load Connection 5.5 Mainframe Extension Connection Figure 5.5 Mainframe Extension Connection The Extended Mainframe interface is used to connect the mainframe extension to expand the number of channels. Up to 16 total channels can be supported when mainframe is connected to the mainframe extension. -
Page 46: Pc Control Connection
Load Connection 5.6 PC Control Connection The MDL4U Series DC Electronic Load can achieve remote control via USB, RS-232, LAN, or GPIB interface, but only one interface can be used at a time. To choose the interface: 1. Connect communication cable before powering on. -
Page 47: Operations
Operations 6.1 Operation Modes The electronic load has the following operation modes: 6.1.1 Constant Current (CC) Mode ........... . 6.1.2 Constant Voltage (CV) Mode . - Page 48 Operations CC Vmax/Vmin Limits The Vmax and Vmin parameters refer to the voltage high and low limit for the automatic test mode. During automatic test mode, the device test under test (DUT) must be operating within the configured values for the test to PASS upon completion.
- Page 49 Operations Slew Rate Measurement and Actual Transition Time Current slew rate is defined as the change in current over time. A programmable slew rate allows a controlled transition from one load setting to another. The actual transition time is defined as the time for the input to change from 10% to 90%, or 90% to 10% of the programmed current values.
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Page 50: Constant Voltage (Cv) Mode
Operations 6.1.2 Constant Voltage (CV) Mode In CV mode, the electronic load will attempt to sink enough current to cnotrol the source voltage to the programmed value. Figure 6.3 Constanct Voltage Mode CV Ranges When working in CV mode, you can Press the the key to enter the RANGE menu. -
Page 51: Transient Voltage Level
Operations Transient Voltage Level A/B transient voltage level can be set on front panel or by remote operation. The electronic load can continuously toggle between the two levels when transient operation is turned on. -
Page 52: Constant Resistance (Cr) Mode
Operations 6.1.3 Constant Resistance (CR) Mode In CR mode, the electronic load is equivalent to a constant resistance, as shown in figure 6.4. The electronic load will linearly change the current, according to the input voltage. Figure 6.4 Constant Resistance Mode CR Ranges When working in CR mode, you can Press the the key to enter the RANGE menu. -
Page 53: Transient Resistance Level
Operations Transient Resistance Level A/B transient resistance level can be set on front panel or by remote operation. The load can continuously toggle between the two levels when transient operation is turned on. -
Page 54: Constant Power (Cp) Mode
Operations 6.1.4 Constant Power (CP) Mode In CP mode, the electronic load will consume a constant power. When input voltage increases, the input current will dexrease, while power (P = V * I) will remain the same. Figure 6.5 Constant Power Mode CP Ranges When working in CW mode, you can Press the the key to enter the RANGE menu. - Page 55 Operations Transient Power Level A/B transient power level can be set via the front panel or by remote operation. The electronic load can continuously toggle between the two levels when transient operation is turned on.
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Page 56: Setting Cv,Cc,Cr, Cw Mode
Operations 6.1.4.1 Setting CV,CC,CR, CW Mode To set up an operation mode from the front panel: 1. Power on the electronic load. Self-test 2. Press the keys to select the channel to be edited, such as channel 1. CH01 CC OFF 3. -
Page 57: Local Operations
Operations 6.2 Local Operations 6.2.1 Mainframe Panel The front panel keys are effective only in the local mode. When the load is powered on, it works in local mode automatically (unless any of the remote interfaces are connected to a device controlling it). Select a channel number and set parameters such as voltage or current via the front panel keys. - Page 58 Operations 1. VFD Display When powering on, the VFD screen will light up and show the instrument’s firmware version. Then the system will begin power-on self-test, check all the installed modules of the load, and display every channel’s number, voltage, and current measurements. 2.
- Page 59 Operations 3. Entry/Shift Key Description Numeric Keys These are number input keys. This key can be used to exit any working state. This key is used for decimal. These keys are used to move up and down the menu selection. This key is used to confirm selection.
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Page 60: Module Panel
Operations 6.2.2 Module Panel Figure 6.7 Module Front Panel 1. VDF Display: Bright VFD display shows module‘s operating mode. -
Page 61: Module Panel Lock
Operations 2. Panel Keys Description Switch A/B transient preset value. (single channel modules) Switch the left/right channels. Press the this key + rotary knob to control the two channels. (dual-channel modules) Short Used for short testing. This allows the load to simulate a short circuit at the input. Mode Switches the operating mode (CC, CR, CV, or CW). -
Page 62: Switching Channels
Operations 6.3 Switching Channels There are three ways to switch channels: 1. Press the the + number keys. 2. Press the the keys. 3. Press the the number key of the channel in the Setup menu. 6.4 Channel Synchronization To change the synchronization of the channels: 1. -
Page 63: Module Vfd Indicator Function Description
Operations 6.5 Module VFD Indicator Function Description Figure indicates Figure 6.8 Load Module VFD Panel The indicator of the dual-channel module’s left/right channel. If you want to edit left/right channel parameters, first select the channel using the L/R key. Single-channel module will always display R. Indicates that the module input is off. -
Page 64: Transient Operation
Operations Short Is displayed when short circuit function is enabled on the module. Tran Is displayed when TRANSIENT mode is enabled on the module. List Is displayed when selecting LIST mode in the Configuration menu. Sense Is enabled in remote sense function. There is no need to set this in the menu, as you only need to link the circuit to remote sense terminals and ‘Sense’... -
Page 65: Pulse
Operations In CC mode, transient testing can be used to check the stability of the source voltage. Transient functions have two current levels (A level, B level), which should be in the same range (high range or low range). You can set the A/B level delay time and the rise/fall slew rate via the mainframe keypad. The slew rate determines the rate at which the level changes. -
Page 66: Toggle
Operations 6.6.3 Toggle The lectronic 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 6.11 Toggle Transient Operation 6.6.4 Setting Up A/B Transient Operation Thee following is a short tutorial of how to set up A/B transient operation for the electronic load. - Page 67 Transient Operation Programming Example In remote mode, the following commands can be used to setup the same parameters used in the tutorial above. (refer to MDL4U Series Programming Guide for more information).
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Page 68: List Operation
Operations CURRent:TRANsient:MODE CONTinuous CURRent:TRANsient:ALEVel 10 CURRent:TRANsient:AWIDth 0.2ms CURRent:TRANsient:BLEVel 2 CURRent:TRANsient:BWIDth 0.3ms TRANsient ON TRIGger:IMMediate 6.7 List Operation List mode lets you generate complex sequences of input changes on a single channel with rapid and precise timing, which may be synchronized with internal or external signals. This is useful when running test sequences with a minimum amount of overhead. -
Page 69: Setting Up List Operation Mode
Operations 6.7.1 Setting Up List Operation Mode The following is a quick tutorial of how to set up List Mode for your electronic load. 1. Power on the electronic load. 2. Press the keys to select the channel to be edited. 3. - Page 70 Operations 20. Select memory position to save list file. Input value and press the key to confirm. 21. Press the key to select Function Mode and press the 22. Select List and press the to confirm. 23. Press the key twice to exit menus. 24.
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Page 71: Trigger Operation
Operations 6.8 Trigger Operation The trigger operation can be used in the following operations: transient pulse output, triggered output, and list output. The electronic load has five kinds of trigger modes to synchronously trigger the tested instrument. Before enabling the trigger function, the trigger source must be selected. 6.8.1 Manual Trigger When manual trigger mode is active, pressing the Trig key on the front panel will enable a trigger operation. -
Page 72: Short Operation
The load/unload speed of On/Off operation is not dependent on the rise/fall slew rate. When in remote control mode, send the SCPI command “INPut ON” to turn the input on (refer to MDL4U Series Programming Guide for more information on remote commands). 6.11 Von Operation The Von voltage value can be set to control the voltage turn on state for the electronic load. - Page 73 Operations Figure 6.13 Von LATCH Load’s Working Range Setting Up the Von Function The following is a quick tutorial of how to set up the Von function for your electronic load. In this example, Channel 1 Von is enabled and set to 5 V. 1.
- Page 74 Operations Figure 6.14 Von LATCH Load’s Working Range 7. Press the key to select Von Latch and press the key. 8. Select On and press the key to confirm. 9. Press the key twice to exit menus. 10. Press the key to turn on the electronic load’s input.
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Page 75: Save And Recall Operation
Operations 6.12 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, and more. Up to 101 groups of setting parameters can be saved. Group 0 can be used for power-up settings. Groups 1 through 100 can be used for automatic testing parameters. -
Page 76: Module Controlling Link
Operations 6.13 Module Controlling Link There is an 8-pin terminal and current monitoring connector on every module’s rear panel. Figure 6.15 Single-Channel Control Module Link Signal Description Ground Voltage fault indication terminal Digital input terminal Digital output terminal I OUT Current monitoring output SENSE + Voltage remote measuring terminal ( + ) -
Page 77: Digital I/O
6.14 Automatic Test The automatic test function of the MDL4U Series electronic load is useful for simulating various tests and allows the user to edit up to 10 program files. Each file has 10 steps and up to 100 steps can be edited and saved into the EEPROM. -
Page 78: Configuring Instrument Settings
Operations 6.15.1 Configuring Instrument Settings The automatic test runs a program that uses the settings stored into the internal EEPROM memory. Each program can run 10 sequences, and each of these sequences is correlated to instrument settings that are stored within a designated group of internal EEPROM memory. They are designated according to the table below: Save Table PROGRAM 1... - Page 79 Operations 4. Press the key to enter the Mode menu. 5. Press the key to select the operating mode. Every step’s mode can be edited. Press the key to confirm. 6. Press the key to select ISet. 7. Press the to enter the menu and set the working current.
- Page 80 Operations 17. The MDL4U Series with mainframe extension can support a maximum of 16 channels. 0 represents the MDL4U001 mainframe and 1 represents the MDL4U002 mainframe extension. 7531 indicates channels 1, 3, 5, and 7 have been equipped with electronic load modules.
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Page 81: Recall Test Files
Operations Figure 6.16 pf Delay Time 25. Repeat steps 17 through 20 and set the rest of the steps’ load on/off time. 26. Set condition for when to stop testing. – COMPLETE means to stop test when all steps are completed. –... - Page 82 Operations 1. Press to enter the Program menu. 2. Press key to select Recall Prog and press 3. Input the saved program number and press to recall the saved testing file. 4. To run the program, press key to select Run Program and press 5.
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Page 83: Remote Operation
Operations 6.16 Remote Operation There are four types of communication interfaces available: USB, Ethernet, GPIB, and RS232. Figure 6.17 Communication Interfaces... -
Page 84: Usb Interface
Operations 6.16.1 USB Interface Use Type A to Type B USB cables to connect the electronic load and the PC. All electronic load functions are programmable over the USB. Press on the front panel to enter the System menu. Select Communication and choose USBTMC-USB488. -
Page 85: Rs232 Data Format
Operations RS232 Interface Use a cable with two COM interfaces (DB9) to connect the electronic load and PC. It can be activated by selecting RS-232 in Communication of the System menu. There are two COM interfaces on the rear panel of the MDL4U001 mainframe: the left 9-pin COM interface is the RS-232 communication interface and the right 9-pin COM serial port connection is not for use. -
Page 86: Rs232 Flow Control
Operations RS232 Flow Control The RS232 interface supports the following flow control options. For each case, the electronic load will send a maximum of five characters after hold-off is asserted by the controller. The electronic load is capable of receiving as many as fifteen additional characters after it asserts hold-off. •... -
Page 87: Communication Settings
Operations RS232 Troubleshooting If you are having trouble communicating over the RS-232 interface, check the following: • The computer and the electronic load must be configured for the same baud rate, parity, number of data bits, and flow control options. Note that the electronic load is configured for 1 start bit and 1 stop bit (these values are fixed). -
Page 88: Specifications
Specifications Modular Programmable DC Electronic Load MDL4U Series Specifications Model MDL4U200 MDL4U252 MDL4U302 MDL4U305 MDL4U400 MDL4U505 MDL4U600 Input rating Input Voltage 0 to 80 V 0 to 80 V 0 to 80 V 0 to 500 V 0 to 80 V... - Page 89 Modular Programmable DC Electronic Load MDL4U Series Specifications Specifications Model MDL4U200 MDL4U252 MDL4U302 MDL4U305 MDL4U400 MDL4U505 MDL4U600 Readback voltage 0 to 18 V Range High 0 to 80 V 0 to 500 V 0 to 80 V 0 to 500 V 0 to 80 V 0.1 mV...
- Page 90 Modular Programmable DC Electronic Load MDL4UB Series Specifications Specifications Model MDL4U102B MDL4U200B MDL4U252B MDL4U302B MDL4U305B MDL4U400B MDL4U502B MDL4U505B MDL4U600 Input rating Input Voltage 0.1 to 80 V 0 to 80 V 0 to 80 V 0 to 80 V 0 to 600 V 0 to 80 V 0.1 to 600 V 0 to 600 V...
- Page 91 Modular Programmable DC Electronic Load MDL4UB Series Specifications Specifications Model MDL4U102B MDL4U200B MDL4U252B MDL4U302B MDL4U305B MDL4U400B MDL4U502B MDL4U505B MDL4U600B Readback Voltage 0 to 18 V Range High 0 to 80 V 0 to 600 V 0 to 80 V 0 to 600 V 0 to 80 V 0.1 mV 1 mV...
- Page 92 Modular Programmable DC Electronic Load MDL4U Series Specifications Specifications Mechanical Specifications Model MDL4U001 MDL4U002 MDL4U200 MDL4U252 MDL4U302 MDL4U305 MDL4U400 MDL4U505 MDL4U600 Type Mainframe Mainframe extension Module Dimensions 17.3” x 7” x 21.6” 17.3” x 7” x 21.6” 3.2” x 6.7” x 22.6” (82 x 170.5 x 573 mm) (W x H x D) (440 x 177.3 x 549 mm)
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Page 93: Service Information
Service Information Warranty Service: Please go to the support and service section on our website at bkprecision.com to obtain an 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. -
Page 94: Limited Three-Year Warranty
LIMITED THREE-YEAR WARRANTY B&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 three years from date of purchase. B&K Precision Corp. will, without charge, repair or replace, at its option, defective product or component parts.
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