B+K precision MDL Series Manuale utente

MDL Series

Programmable DC Electronic Load

Models: MDL001, MDL002, MDL200, MDL252,

MDL302, MDL305, MDL400, MDL505, MDL600

USER MANUAL

Safety Summary

The following general safety precautions must be observed during all phases of operation 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. We

assume no liability for the Customer’s failure to comply with these requirements.

ENVIRONMENTAL CONDITIONS

This instrument is intended for indoor use, pollution degree 2 environments. It is designed to

operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the

specifications tables for the AC mains voltage requirements and ambient operating temperature

range.

BEFORE APPLYING POWER

Verify that all safety precautions are taken. Note the instrument's external markings described

under "Safety Symbols".

GROUND THE INSTRUMENT

This product is a Safety Class 1 instrument (provided with a protective 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 cable, with the

ground wire firmly connected to an electrical ground (safety ground) at the power outlet. Note:

Any interruption of the protective (grounding) conductor or disconnection of the protective earth

terminal will cause a potential shock hazard that could result in personal injury.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

Do not operate the instrument in the presence of fumes or flammable gases.

KEEP AWAY FROM LIVE CIRCUITS

Operating personnel must not remove instrument covers except as instructed in this guide for

installing or removing electronic load modules. Component replacement and internal adjustments

must be made only by qualified service personnel. Do not replace 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 components.

DO NOT SERVICE OR ADJUST ALONE

Do not try to do some internal service or adjustment unless another person capable of rendering

first aid resuscitation is present.

Safety Symbols

Direct current

Alternating current

Both direct and alternating current

Protective earth (ground) terminal

Attention (refer to accompanying documents)

WARNING

The WARNING sign denotes 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 indicated conditions are fully understood and met.

CAUTION

The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which,

if not correctly performed or adhered to, could result in damage to or destruction of part or all of

the product. Do not proceed beyond a CAUTION sign until the indicated conditions are fully

understood and met.

Compliance Statements

Disposal of Old Electrical & 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, and 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 applicable requirements.

CE Declaration of Conformity

The DC electronic load meets the requirements of Low Voltage Directive 73/23/EEC and

Electromagnetic Compatibility Directive 89/336/EEC amended by 93/68/EEC.

Low Voltage Directive

-EN61010-1: 2001

EMC Directive

-EN50081-1

-EN50082-1

Table of Contents

Safety Summary.................................................................................... 2

Compliance Statements......................................................................... 4

Product Overview ................................................................................. 8

Description..............................................................................................................................8

Features ..................................................................................................................................9

Front Panel............................................................................................................................10

Rear Panel.............................................................................................................................11

Protection Functions..............................................................................................................12

Overvoltage Protection (OVP) ............................................................................................12

Overcurrent Protection (OCP).............................................................................................12

Overpower Protection (OPP) ..............................................................................................14

Overtemperature 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

Channel Number ...................................................................................................................24

Location ................................................................................................................................25

Input Voltage Selection..........................................................................................................27

Turn-On Checkout .................................................................................................................28

If the Electronic Load Does Not Turn On.................................................................................29

Load Connection ................................................................................. 30

Remote Sense Connection .....................................................................................................31

Parallel Connection................................................................................................................32

Mainframe 8-pin Control Connector.......................................................................................33

External Trigger Connections .................................................................................................34

External ON/OFF Control Connection.....................................................................................35

Mainframe Extension Connection ..........................................................................................35

PC Control Connection...........................................................................................................36

Operation ........................................................................................... 37

Operating Modes...................................................................................................................37

Constant Current (CC) mode...............................................................................................37

Constant Voltage (CV) Mode ..............................................................................................39

Constant Resistance (CR) Mode..........................................................................................40

Constant Power (CW) Mode ...............................................................................................41

Constant Impedance (CZ) Mode..........................................................................................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

Transient Operation ..............................................................................................................51

Continuous.........................................................................................................................51

Pulse..................................................................................................................................52

Toggle................................................................................................................................53

Setting Up A/B Transient Operation ...................................................................................53

List Operation........................................................................................................................56

Setting Up List Operation Mode..........................................................................................56

Triggered Operation ..............................................................................................................60

Trigger Function .................................................................................................................60

Trigger Source....................................................................................................................60

Short Operation.....................................................................................................................60

Input On/Off Operation.........................................................................................................61

Von Operation.......................................................................................................................61

Setting Up Von Function.....................................................................................................62

Save and Recall Operation .....................................................................................................63

Module Controlling Link.........................................................................................................64

Voltage Failure Indication...................................................................................................65

Current Monitoring ............................................................................................................65

Digital I/O ..........................................................................................................................65

Remote Sense Function......................................................................................................66

External Analog Control......................................................................................................66

Automatic 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

Parity........................................................................................................................................73

RS-232 Flow Control.................................................................................................................74

RS-232 Connections .................................................................................................................74

RS-232 Troubleshooting...........................................................................................................75

Communication Setting......................................................................................................75

Specifications...................................................................................... 76

Supplementary Characteristics...............................................................................................78

SERVICE INFORMATION....................................................................... 79

LIMITED THREE-YEAR WARRANTY ....................................................... 80

Product Overview

This section describes the main features and menus of the MDL Series DC Electronic Load. The MDL

Series is comprised of two parts, mainframes and modules. The mainframes mentioned are the

MDL001 mainframe and the MDL002 mainframe extension. Modules in this series include the

MDL200, MDL252, MDL302, MDL305, MDL400, MDL505, and MDL600. Unless otherwise noted,

this document will refer to all of these instruments as “electronic load”. The range of each

module’s specific voltage, current, and power is listed in the Specifications section.

Description

The MDL Series is a multi-channel programmable DC electronic load system. With programming

and remote control capabilities, the MDL Series DC electronic load can provide multiple solutions

according to the requirements of your design and is suitable for testing a wide range of power

sources from multi-output DC power supplies to batteries, fuel cells, 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 four

additional module slots for a maximum of 16 channels. The electronic load is configured by

installing user-selectable modules into the mainframe and operated using the front panel keypad

and rotary knob. It can also be controlled remotely via USB, RS-232, LAN, or GPIB interface. The

electronic load modules all have similar functions, but may differ in range of input voltage, current,

and power. The high resolution voltage and current measurement system provides both accuracy

and convenience.

The electronic load can be used in one of five different operation modes: constant voltage (CV),

constant current (CC), constant resistance (CR), constant power (CW), or constant impedance (CZ).

All panel operation and programming functions are carried out on the MDL001 mainframe panel. A

wide range of dynamic loading applications can be simulated through user-programmable slew

rates, load levels, duration, and conducting voltage.

Features

CC/CV/CR/CW/CZ operating modes

Removable modules for easy system flexibility

Bright VFD display for both mainframe and modules

Power range up to 2400 W (4800 W with mainframe extension)

Supports up to 16 channels with mainframe extension

Operate identical modules in parallel mode for high current applications

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 84 user programmable steps

Adjustable slew rate in CC mode

Automatic test function

101 memory areas to save/recall setting parameters

Analog current control and monitoring

Remote sensing

Standard LAN, GPIB, USBTMC compliant USB, and RS-232 interfaces with SCPI protocol

support

OVP/OCP/OPP/OTP and reverse voltage protection

Front Panel

Figure 1 - MDL Series Front Panel

1) VFD DISPLAY

Displays electronic load information.

2) MODULE PANEL KEYS

Controls module functions. Refer to Module section for more details 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 these keys.

5) MAINFRAME NUMERIC ENTRY AND SHIFT KEYS

Refer to Mainframe section for more details on the use of these keys.

6) POWER SWITCH

Turns the system on or off.

7) MAINFRAME

8) MODULES

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