Kikusui PLZ164W, PLZ334W, PLZ1004W, PLZ164WA, PLZ664WA User Manual

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Part No. IB020915

Oct. 2015

USERS MANUAL

ELECTRONIC LOAD PLZ-4W Series

PLZ 164 W PLZ 164 WA PLZ 334 W PLZ 664 WA PLZ 1004 W

About the PLZ-4W series Manuals

Manual construction

Setup Guide

The setup guide is intended for first-time users of the PLZ-4W series. It gives an overview of the PLZ4W series, connecting procedures, safety precautions, etc. Please read through and understand this guide before operating the product.

Quick Reference

The quick reference briefly explains the panel description and the basic operation of the PLZ-4W.

User’s Manual (This manual, PDF)

User’s manual is intended for first-time users of the PLZ-4W series. It gives an overview of the PLZ4W series and describes various settings, measurement procedures, maintenance, safety precautions, etc.

Communication Interface Manual (HTML, partially PDF)

The Communication Interface Manual explains the settings and commands for remotely controlling the PLZ-4W series, using the communication interface and gives sample programs. The interface manual is written for readers with sufficient basic knowledge of how to control instruments using a personal computer.

PDF and HTML files are included in the accompanying CD-ROM. Adobe Reader 9.2 or later is required to view the PDF files. Microsoft Internet Explorer 9 or later is required to view the HTML files.

Please read through and understand the Operation Manual before operating the product. After reading, always keep the manuals nearby so that you may refer to it as needed. When moving the product to another location, be sure to bring the manuals as well. If you find any incorrectly arranged or missing pages in the manual, they will be replaced. If the manual gets lost or soiled, a new copy can be provided for a fee. In either case, please contact Kikusui distributor/ agent, and provide the “Kikusui Part No.” given on the cover. The Operation Manual has been prepared with the utmost care; however, if you have any questions, or note any errors or omissions, please contact Kikusui distributor/agent.

Firmware versions that this manual covers

This manual covers firmware versions 1.4X. When contacting us about the product, please provide us with:

The model (marked in the top section of the front panel) The firmware version (see page 2-9) The serial number (marked on the rear panel)

Trademarks

Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/ or other countries. Other company names and product names used in this manual are generally trademarks or registered trademarks of the respective companies.

Copyrights

Reproduction and reprinting of operation manual, whole or partially, without our permission is prohibited. Both unit specifications and manual contents are subject to change without notice.

Contents

Chapter 1 General Information 1-1

Chapter 2 Installation and Preparation 2-1

1.1 About This Manual - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-2

1.2 Product Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-2

1.3 PLZ-4W Series Lineup - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-3

1.4 Features - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-4

1.5 Overview of Controls - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-6

1.6 Options - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-8

2.1 Checking the Package Contents - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-2

2.2 Precautions Concerning Installation Location - - - - - - - - - - - - - - - - - - - 2-3

2.3 Precautions When Moving the Unit - - - - - - - - - - - - - - - - - - - - - - - - - - 2-4

2.4 Connecting the Power Cord - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-5

2.5 Grounding (Earth) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-6

2.6 Turning on The Power - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-7

2.7 Checking the ROM Version - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-9

2.8 Load Wiring - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-10

2.8.1 Precautions Concerning Wiring - - - - - - - - - - - - - - - - - - - - - - - 2-10

2.8.2 Connection to the Load Input Terminal on the Rear Panel - - - - - 2-14

2.8.3 Connection to the Load Input Terminal on the Front Panel - - - - 2-17

Chapter 3 For First Time Users 3-1

3.1 What Is an Electronic Load - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-2

3.2 Basic Flow of Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-3

3.3 Operating area of the PLZ-4W - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-6

3.4 Basic Operation Modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-7

3.4.1 Operation of the CC Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-7

3.4.2 Let's Use CC Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-9

Chapter 4 Names and Functions of Parts 4-1

4.1 Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-2

4.2 Rear Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-4

4.3 Operation Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-6

4.4 Display - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-12

Chapter 5 Basic Operation 5-1

5.1 Panel Control Basics - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-2

5.2 Turning On or Off the Load - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-3

5.3 Types of Protection Functions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-6

5.4 Setting the Protection Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-8

5.5 Operation Modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-9

PLZ-4W Contents 3

5.6 CC Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-10

5.7 CR Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-13

5.8 CV Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-16

5.9 CP Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-18

5.10 Soft start - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-20

5.11 Lock Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-22

5.12 Short Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-24

5.13 Menu Setup - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-25

5.14 Initialization - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-28

5.15 Response Speed - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-29

Chapter 6 Applied Operation 6-1

6.1 ABC preset memories - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-2

6.1.1 Saving to ABC preset memories - - - - - - - - - - - - - - - - - - - - - - - 6-3

6.1.2 Recalling ABC preset memories - - - - - - - - - - - - - - - - - - - - - - - - 6-3

6.2 Setup Memory - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-6

6.2.1 Saving to the Setup Memory - - - - - - - - - - - - - - - - - - - - - - - - - - 6-7

6.2.2 Recalling the Setup Memory - - - - - - - - - - - - - - - - - - - - - - - - - - 6-8

6.3 Switching Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-10

6.4 Setting the Slew Rate - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-12

6.5 Using the Elapsed Time Display and the Auto Load Off Timer - - - - - - - 6-13

6.6 Sequence Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-14

6.6.1 Overview of the Normal Sequence - - - - - - - - - - - - - - - - - - - - - 6-15

6.6.2 Sequence Editing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-18

6.6.3 Sequence Example (Normal Sequence) - - - - - - - - - - - - - - - - - 6-21

6.6.4 Overview of the Fast Sequence - - - - - - - - - - - - - - - - - - - - - - - 6-27

6.6.5 Fast Sequence Editing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-29

6.6.6 Sequence Example (Fast Sequence) - - - - - - - - - - - - - - - - - - - - 6-31

6.6.7 Executing, Pausing, Stopping the Sequence - - - - - - - - - - - - - - - 6-36

6.7 Remote Sensing Function - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-38

6.8 External Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-39

6.8.1 Overview and Precaution of External Control - - - - - - - - - - - - - - 6-39

6.8.2 J1/J2 connector - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-40

6.8.3 External Control of CC Mode - - - - - - - - - - - - - - - - - - - - - - - - 6-44

6.8.4 External Control of CR Mode - - - - - - - - - - - - - - - - - - - - - - - - 6-50

6.8.5 External Control of CP Mode - - - - - - - - - - - - - - - - - - - - - - - - 6-52

6.8.6 External Control of CV Mode - - - - - - - - - - - - - - - - - - - - - - - - 6-54

6.8.7 External Control of Load On and Load Off - - - - - - - - - - - - - - - 6-56

6.8.8 Trigger Signal Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-57

6.8.9 External Control of the Current Range - - - - - - - - - - - - - - - - - - 6-58

6.8.10 Alarm Signal Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-59

6.9 Monitor Signal Output - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-60

6.10 Parallel operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-62

6.10.1 Parallel Operation Using the Same Model - - - - - - - - - - - - - - - - 6-62

6.10.2 Parallel Operation Using Load Boosters - - - - - - - - - - - - - - - - - 6-65

6.10.3 Alarms during Parallel Operation - - - - - - - - - - - - - - - - - - - - - 6-66

4 Contents PLZ-4W

6.10.4 Response Speed during Parallel Operation - - - - - - - - - - - - - - - - 6-66

6.10.5 Slew Rate during Parallel Operation - - - - - - - - - - - - - - - - - - - - 6-66

6.10.6 Canceling the Parallel Operation - - - - - - - - - - - - - - - - - - - - - - 6-66

Chapter 7 Remote Control 7-1

7.1 Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-2

7.2 Interface Setup - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-3

7.2.1 GPIB Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-3

7.2.2 RS232C Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-4

7.2.3 USB Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-6

7.3 Contents of the accompanying CD-ROM - - - - - - - - - - - - - - - - - - - - - - 7-7

7.3.1 Installing the VISA Library - - - - - - - - - - - - - - - - - - - - - - - - - - 7-8

7.3.2 Installing the Software Application - - - - - - - - - - - - - - - - - - - - 7-10

7.4 Command Details - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-10

Chapter 8 Maintenance and Calibration 8-1

8.1 Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-2

8.1.1 Cleaning the Panels - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-2

8.1.2 Cleaning the Dust Filter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-2

8.1.3 Inspecting the Power Cord - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-3

8.1.4 Internal Inspection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-3

8.2 Confirming status of the fuse - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-4

8.3 Calibration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-5

8.3.1 Calibration Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-5

8.3.2 Preparation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-6

8.3.3 Calibration Procedure - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-7

8.4 Malfunctions and Causes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8-14

Chapter 9 Specifications 9-1

9.1 Electrical Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9-2

9.2 General Specifications ----------------------------- 9-8

9.3 Dimensions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9-10

Appendix A-1

A.1 Operating Area of the PLZ-4W - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-1 A.2 Basic Operation Modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-2

A.2.1 Operation of the CC Mode - - - - - - - - - - - - - - - - - - - - - - - - - - A-2 A.2.2 Operation of the CR Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - A-4 A.2.3 Operation of the CP Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - A-6 A.2.4 Operation of the CV Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - A-8 A.2.5 Operation of the CC+CV Mode - - - - - - - - - - - - - - - - - - - - - - A-10 A.2.6 Operation of the CR+CV Mode - - - - - - - - - - - - - - - - - - - - - - A-12

A.3 Operating Area of Each Model - - - - - - - - - - - - - - - - - - - - - - - - - - - - A-15

A.3.1 Operating Area of the PLZ164W - - - - - - - - - - - - - - - - - - - - - - A-15

PLZ-4W Contents 5

A.3.2 Operating Area of the PLZ334W - - - - - - - - - - - - - - - - - - - - - - A-16 A.3.3 Operating Area of the PLZ1004W - - - - - - - - - - - - - - - - - - - - - A-17 A.3.4 Operating Area of the PLZ164WA - - - - - - - - - - - - - - - - - - - - A-18 A.3.5 Operating Area of the PLZ664WA - - - - - - - - - - - - - - - - - - - - A-19

A.4 Sequence Program Creation Table - - - - - - - - - - - - - - - - - - - - - - - - - - A-20

Index I- 1

6 Contents PLZ-4W

Chapter 1 General Information

This chapter gives an overview and introduces the features of the PLZ-4W Series Electronic Loads.

PLZ-4W General Information 1-1

1.1 About This Manual

This operation manual covers the following PLZ-4W Series Electronic Loads.

• PLZ164W • PLZ164WA

• PLZ334W • PLZ664WA

• PLZ1004W

Product version covered

This operation manual covers electronic loads with ROM version 1.3x. When contacting us about the product, please provide us the following information.

• Model

• ROM version

• Manufacturing number (indicated at the lower section on the rear panel)

For the procedure of confirming the ROM version, see section 2.7, ?Checking the ROM Version.”

1.2 Product Overview

The PLZ-4W Series Electronic Load is a multifunctional system designed to offer the highest levels of reliability and safety. The electonic load contains a stable and high-performance current control circuit that enables high-speed load simulations. In addition, its CPU control feature works to improve operability and multifunctional capability.

The high-precision current settings provide you with sufficient resolution. Because the electonic load comes standard with GPIB, RS232C, and USB commu-

nication functions, it can easily be incorporated into wide-ranging test and inspection systems.

1-2 General Information PLZ-4W

1.3 PLZ-4W Series Lineup

The PLZ-4W Series consists of the electronic load and the load booster.

1. Electronic load (PLZ-4W or PLZ-4WA)

2. Load booster (PLZ-4WB)

Two types of the PLZ-4W Series are available depending on the input operating voltage.

1. Operating range of 1.5 V to 150 V. (PLZ-4W and PLZ-4WB)

2. Operating range of 0 V to 150 V. (PLZ-4WA)

■ Electronic load

Model

PLZ164W 33

PLZ334W 66 330

PLZ1004W 200 1 000

PLZ164WA 33

PLZ664WA 132 660

■ Load booster

Model

PLZ2004WB

*1. PLZ2004WB is a dedicated option for PLZ1004W.

Maximum Operating

Current (A)

Maximum Operating

Current (A)

400 1.5 to 150 2 000

Operating

Voltage (V)

1.5 to 150

0 to 150

Operating

Voltage (V)

Wattage (W)

165

Wattage (W)

PLZ-4W General Information 1-3

1.4 Features

In addition to the high-performance constant current, constant resistance, and constant power modes, the PLZ-4W Series Electronic Load offers wide variety of other features.

■ High-speed slew rate of 16 A/s (PLZ1004W)

The rise and fall slew rate of the current when switching at 2 % to 100 % (20 % to 100 % in M range) of the rated current in constant current mode is 16 A/s (PLZ1004W), which converts to rise and fall times of 10 s (all types).

This allows you to conduct more accurate DC power transient response tests and to generate simulated waveforms for use as dummy loads.

■ Variable slew rate

Unlike the conventional electronic loads that were configured using rise and fall times, the PLZ-4W allows configuration using slew rates (A/s) in constant current and constant resistance modes.

This allows you to optimize the voltage drop caused by the wire inductance that occurs when a load is switched or the transient control of the equipment under test (such as a constant voltage power supply).

■ Higher precision

Higher precision is offered for current settings. Resolution at low current settings is provided using a 3-range configuration. (A 0.01

mA resolution is possible at the L range of the PLZ164W.)

■ Operability

The PLZ-4W employs a large LCD. Measured values of voltage, current, and power at the load input terminal are indi-

cated at all times. The values are indicated using larger characters than other sections to improve the visibility.

Coarse and fine adjustments using the rotary knob are useful for setting values over a wide range.

The easy-to-use memory function enables repetitive tests.

■ 0 V input type

A 0 V input operating voltage type is available. This feature is a must for single cell tests of fuel cells. Moreover, the operating volt-

age of semiconductor devices is decreasing more and more due to the reduction of the power consumption and miniaturization of the semiconductor process. The 0 V input type can be used to evaluate the power supplies for these types of applications.

■ Sequence function

Sequence patterns set arbitrarily can be saved to built-in memory. Up to 10 normal sequence programs and 1 fast sequence program can be saved. Up

to 256 steps and 1024 steps can be saved for each normal sequence program and fast sequence program, respectively.

1-4 General Information PLZ-4W

The sequence pattern can be edited easily using the large LCD.

■ Useful function for battery discharge tests

The PLZ-4W can measure the time from load on to load off. When combined with the under voltage protection (UVP) function, the time from

when the battery discharge is started until the battery voltage falls to the cutoff voltage can be measured (time measurement).

In voltage measurement, the voltage immediately before the load turns off is measured. If you set a timer to turn off the load after a specified time elapses, you can measure the closed circuit voltage after a specified time elapses from the start of battery discharge (voltage measurement).

■ Load booster

To achieve large capacity at low cost, the PLZ1004W comes with a load booster (PLZ2004WB).

Using a single PLZ1004W as a master unit, up to four load boosters can be connected in parallel (9 kW, 1 800 A maximum).

■ Standard GPIB, RS232C, and USB communication functions

Because the electonic load comes standard with GPIB, RS232C, and USB communication functions, it can easily be incorporated into wide-ranging test and inspection systems.

Wide variety of systems can be configured when combined with the sequence function.

PLZ-4W General Information 1-5

1.5 Overview of Controls

AC INPUT

100-240V 47

63Hz

160VA MAX

KCC-REM-KEJ

PLZ-78270 2012/05

AC INPUT

100-240V 47

63Hz

160VA MAX

This section describes the controls on the electronic load and combined systems.

Operation using the control panel

The PLZ-4W employs a large LCD. Measured values of voltage, current, and power at the load input terminal are indicated at all times. The values are indicated using larger characters than other sections to improve the visibility.

Coarse and fine adjustments using the rotary knob are useful for setting values over a wide range.

Fig.1-1 Panel control

External communication interface

The PLZ-4W can be controlled from a PC. GPIB, RS232C, and USB communication functions come standard.

Fig. 1-2 PLZ-4W and PC connection diagram

1-6 General Information PLZ-4W

Support for large capacity

Master (PLZ1004W)

Master Slave

Load booster (PLZ2004WB)

Slave (PLZ1004W)

Up to four PLZ2004WBs can be connected

Up to five PLZ-4Ws of the same type as the master device can be connected

PLZ-4W other than PLZ1004W

PLZ1004W

Up to five PLZ1004Ws can be connected

( )

To achieve large capacity at low cost, the PLZ1004W comes with a load booster (PLZ2004WB).

Using a single PLZ1004W as a master unit, up to four load boosters can be connected in parallel (9 kW, 1 800 A maximum).

In parallel operation without using load boosters, up to five electonic loads of the same type including the master unit can be connected in parallel (5 kW, 1000 A maximum).

Fig. 1-3 Parallel connection

PLZ-4W General Information 1-7

1.6 Options

Control flat cables

Control cable used to connect between the master unit and the slave unit (load booster) and between slave units. The following two types of cables are available.

Model Code Length Application

PC01-PLZ-4W 84540 300 mm

PC02-PLZ-4W 84550 550 mm Connect between the master unit and load booster

The two types of cables only differ in their length. The 550-mm PC02-PLZ-4W is required to connect the master unit and the load booster.

Analog remote contorol connector kit (OP01-PLZ-4W)

Connect between

unit (load booster) and between slave units

the master unit and the slave

A kit for connecting to the J1/J2 connector.

Pins 20 pcs.

Socket 1 pc.

Protection cover 1 set

1-8 General Information PLZ-4W

Rack Mounting Option

KRA3

KRA150

132.5 (5.22)

57 (2.24)

37.75 (1.49)

149

100

24.5

465 (18.31) 482 (18.98)

460 480

KRB3-TOS

KRB150-TOS

149

100

24.5

460 479

132 (5.20)

(2.24)

37.5

(1.48)

465 (18.31) 479 (18.86)

The following rack mounting options are available.

Item Model Applicable Model Note

Rack adapter

KRA3

(Fig. 1-4)

KRA150

PLZ164W PLZ334W PLZ164WA

KRB3-TOS

Rack mount bracket (Fig. 1-5)

PLZ664WA PLZ1004W

KRB150-TOS

For details, contact your Kikusui agent or distributor.

Inch rack EIA standard

Milli rack JIS standard

Inch rack EIA standard

Milli rack JIS standard

Unit: mm (inch)

Fig. 1-4 Rack adapter

Unit: mm (inch)

Fig. 1-5 Rack mount bracket

PLZ-4W General Information 1-9

1-10 General Information PLZ-4W

Chapter 2 Installation and

Preparation

This chapter describes the procedures of unpacking and preparation before using the PLZ-4W.

PLZ-4W Installation and Preparation 2-1

2.1 Checking the Package Contents

NOTE

Load input terminal cover (1 pc.) Lock plate (2 pcs.)

J1/J2 protection dummy plug (2 pcs.) [Attached to the product.]

Set of screws for the load input terminal (2 sets)

Power cord (1 pc.)

[Q1-500-085]

[P2-000-228]

[M1-100-012]

[M5-101-007]

[M4-100-007]

[84-49-0071]

or or

Setup Guide (1 pc.)

Quick Reference (Japanese 1sheet, English 1sheet)

CD-ROM (1 pc.)

Plug: NEMA5-15 Rating: 125 Vac/10A [85-AA-0003]

Plug: CEE7/7 Rating: 250 Vac/10A [85-AA-0005]

Plug: GB1002 Rating: 250 Vac/10A [85-10-0790]

The power cord that is provided varies depending on the destination for the product at the factory-shipment.

When you receive the product, check that all accessories are included and that the product and accessories have not been damaged during transportation.

If any of the accessories are damaged or missing, contact your Kikusui agent or distributor.

• It is recommended that all packing materials be saved, in case the product needs to be transported at a later date.

Fig.2-1 Accessories

2-2 Installation and Preparation PLZ-4W

2.2 Precautions Concerning Installation Location

This section describes the precautions to be taken when installing the unit. Make sure to observe them.

■ Do not use the unit in a flammable atmosphere.

To prevent the possibility of explosion or fire, do not use the unit near alcohol, thinner or other combustible materials, or in an atmosphere containing such vapors.

■ Avoid locations where the unit is exposed to high temperature or direct sunlight.

Do not place the unit near a heater or in areas subject to drastic temperature changes.

Operating temperature range: 0 C to +40 C (+32 F to +104 F) Storage temperature range: -25 C to +70 C ( -13 F to +158 F)

■ Avoid humid environments.

Do not place the unit in high-humidity locations--near a boiler, humidifier, or water supply.

Operating humidity range: 20 % to 85 % RH (no condensation) Storage humidity range: 0 % to 90 % RH (no condensation)

Condensation may occur even within the operating humidity range. In such case, do not use the unit until the condensation dries up completely.

■ Do not place the unit in a corrosive atmosphere.

Do not install the unit in a corrosive atmosphere or in environments containing sulfuric acid mist, etc. This may cause corrosion of various conductors and bad contacts of connectors inside the unit leading to malfunction and failure, or in the worst case, a fire.

However, operation in such environments may be possible through alteration. If you wish to use the unit in such environments, consult your Kikusui agent or distributor.

■ Do not place the unit in a dusty location.

Accumulation of dust can lead to electric shock or fire.

■ Do not use the unit where ventilation is poor.

The unit employs a forced air cooling system. Air is taken in from air inlet located on panels other than the rear panel and exhausted from the air outlet on the rear panel. Secure adequate space around the unit to prevent the possibility of fire caused by accumulation of heat.

Allow at least 20 cm of space between the air inlet/outlet and the wall (or obstacles). Hot air (approximately 20 C higher than the ambient temperature) is exhausted

from the air outlet. Do not place objects that are affected by heat near the air outlet.

PLZ-4W Installation and Preparation 2-3

■ Do not place objects on top of the unit.

Placing objects on top of the unit can cause failures (especially heavy objects).

■ Do not place the unit on an inclined surface or location subject to vibrations.

The unit may fall or tip over causing damages and injuries.

■ Do not use the unit in a location where strong magnetic or electric fields are nearby or a location where large amount of distortion and noise is present on the input power line waveform.

The unit may malfunction.

■ Do not use the unit near highly sensitive measuring instruments or transceivers.

The noise generated by the unit may affect them

■ Secure adequate space around the power plug.

Do not insert the power plug to an outlet where accessibility to the plug is poor. And, do not place objects near the outlet that would result in poor accessibility to the plug.

2.3 Precautions When Moving the Unit

When moving the unit to the installation location or when transporting the unit, note the following points.

■ Turn off the POWER switch.

Moving the unit while the power is turned on can cause electric shock or damage to the unit.

■ Remove all wiring.

Moving the unit with the cables connected can cause wires to break or injuries due to the unit falling over.

■ Hold the handle.

When lifting the unit, hold the handle on the side or top panel.

■ When transporting the unit, be sure to use the original packing materials.

Otherwise, damage may result from vibrations or from the unit falling during transportation.

2-4 Installation and Preparation PLZ-4W

2.4 Connecting the Power Cord

WARNING

NOTE

The power cord that is provided varies depending on the destination for the product at the factory-shipment.

• This product is designed to be connected to a power supply classified as

Overvoltage Category II. Do not connect to a power supply classified as Overvoltage Category III or IV.

• The power cord for 100-V system has a rated voltage of 125 VAC. If this

power cord is used at the line voltage of a 200-V system, replace the power cord with that satisfying that line voltage.

Have a qualified engineer select the appropriate power cord. If obtaining the right power cord is difficult, contact Kikusui distributor/agent.

• The power cord with a plug can be used to disconnect the PLZ-4W series from the

AC power line in an emergency. Connect the plug to an easily accessible power outlet so that the plug can be removed from the outlet at any time. Be sure to provide adequate clearance around the power outlet.

• Do not use the power cord that comes with the product as a power cord for other

equipment.

Check that the AC power supply is within the input power supply range

of the product.

Input voltage range: 100 VAC to 240 VAC

(100 V to 120 V and 200 V to 240 V for the PLZ164WA and PLZ664WA)

Frequency range: 47 Hz to 63 Hz

Check that the POWER switch is turned off.

Connect the power cord to the AC INPUT connector on the rear panel.

Use a power cord specified by Kikusui or one that has been selected by a qualified engineer.

Insert the power plug to the outlet.

PLZ-4W Installation and Preparation 2-5

2.5 Grounding (Earth)

WARNING

CAUTION

Three-pin outlet with proper grounding

Fig. 2-2 Grounding

• Electric shock may occur, if proper grounding is not furnished.

• This product is designed as a Class I equipment (equipment furnished with

electric shock protection through protective grounding in addition to the basic insulation). Be sure to connect the protective ground terminal to an appropriate earth ground.

• If you do not ground the product, malfunction may occur due to external

noise, or the noise generated by the product may become large.

Make sure to ground the unit for your safety. Connect the power cord to a three-pin power outlet with proper grounding.

2-6 Installation and Preparation PLZ-4W

2.6 Turning on The Power

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN /STOP

UVP

PAUS E

STORE

RECALL

ABC

LOAD

Th/TL

FREQ /DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET/VSET

LOCK

SHIFT

ABC

OPP /OCP

POWER

REMOTE

I MON

OUTOUT

TRIG

POWER switch

LOAD key

Load on indication LED

Overview of the procedure

Carry out this procedure without connecting anything to the DC INPUT (load input terminal). Turn on the POWER switch and then operate the LOAD key. At the end, turn off the POWER switch.

If an alarm occurs during operation, see section 5.3, “Types of Protection Functions.

Preparation Main operation Unit behavior

Do not connect anything to the load input terminal.

Turn on the POWER switch. Press the LOAD key.

The display section is activated. LOAD indication LED illuminates.

”

PLZ-4W Installation and Preparation 2-7

Fig. 2-3

Check that the POWER switch is turned off( ).

Check that the power cord is correctly connected.

See section 2.4, “Connecting the Power Cord” and 2.5, “Grounding (Earth).”

Check that nothing is connected to the DC INPUT (load input terminal) on the front and rear panels.

Turn the POWER switch on.

Push the ( ) side of the POWER switch to turn the PLZ-4W on. A self-test is executed. A special screen appears during the test at startup. A

normal display appears when the self-test is complete.

Check whether the display appears as shown in Fig. 2-4.

The measured value displayed using large numbers (section with mA, V, and W unit) indicates coarse zero.

The characters “SET” shown under the measured value is highlighted with an

Constant current (CC) mode is selected on this screen. Therefore, current can be entered.

CAUTION

underline. This indicates that basic settings can be entered in the selected operation mode. This condition in which characters “SET” is highlighted is called the basic set-

ting entry condition.

Fig. 2-4 Basic setting entry condition

6. Press the LOAD key and check that the LED above the key illuminates.

Press the LOAD key again and check that the LED above the key turns off.

Turn off the POWER switch to finish the operation check procedure.

The PLZ-4W saves the last setup conditions through the backup function even when the power is turned off. When the power is turned on the next time, the PLZ-4W returns to the conditions that were backed up.

• To prevent malfunction, allow at least 5 s between power cycles.

If the PLZ-4W does not operate as described in the procedure

If one of the following conditions applies to your case, carry out the corresponding procedure. If the condition does not change even after taking the countermeasure indicated below, contact Kikusui distributor/agent.

Nothing is displayed.

Check the power cord connection and power cycle the unit. Adjust the display contrast. For the adjustment procedure, see the next page.

Indicates an abnormal current or voltage.

Power cycle the unit.

An alarm occurs.

See section 5.3, “Types of Protection Functions.”

2-8 Installation and Preparation PLZ-4W

Adjusting the display contrast

Firmware Version ROM Version

1. While pressing the SHIFT key, use the rotary knob to adjust the con-

trast.

The result is saved.

2.7 Checking the ROM Version

Fig. 2-5 Model Information screen (PLZ164W)

Press the MENU (SHIFT+SET/VSET) key.

The menu screen is displayed.

Use the CURSOR key to select 4. Model Info.

The selected section is highlighted.

Press the ENTER key.

The Model Information screen of Fig. 2-5 is displayed.

Press the MENU (SHIFT+SET/VSET) key to close the menu.

PLZ-4W Installation and Preparation 2-9

2.8 Load Wiring

NOTE

CAUTION

To ensure that the functions of the PLZ-4W work accurately and reliably, all wires must be connected correctly to their loads.

• This operation manual refers to the terminal on the rear panel to which the equip-

ment under test is connected and current is supplied as load input terminal.

2.8.1 Precautions Concerning Wiring

Electric wire used

• Use a load wire with sufficient diameter for the current as well as non-flam-

mable or flame-resistant cover.

If the resistance of the load wire is large, a large voltage drop may occur when a current is supplied and the voltage at the load input terminal may fall below the minimum operating voltage. Refer to Table 2-1 and select thick wires as much as possible.

Table2-1 Nominal cross-sectional area of wires and allowable currents

Nominal Cross-

Sectional Area

]

[mm

2 14 (2.08) 27 10

3.5 12 (3.31) 37 -

5.5 10 (5.26) 49 20

8 8 (8.37) 61 30

14 6 (13.3) 88 50

22 4 (21.15) 115 80

30 2 (33.62) 139 -

38 1 (42.41) 162 100

50 1/0 (53.49) 190 -

60 2/0 (67.43) 217 -

80 3/0 (85.01) 257 200

100 4/0 (107.2) 298 -

125 - - 344 -

150 - - 395 300 200 - - 469 -

250 - - 556 -

325 - - 650 -

*Excerpts from Japanese laws related to electrical equipment.

AW G

(Reference Cross-

Sectional Area)

]

[mm

Allowable Current(*)

[A]

(Ta = 30 C)

Kikusui-Recom-

mended Current

[A]

2-10 Installation and Preparation PLZ-4W

Load wire inductance

EUT

PLZ-4W

ΔI/ΔT

E = Lx (ΔI/ΔT)

Load input terminal

The load wiring has an inductance (L). When the current (I) varies in short time period, it generates a large voltage at both ends of the wiring cable. This voltage applies to all of the load input terminals of the PLZ-4W when the impedance of the EUT is relatively small. The voltage generated by the load wire inductance (L) and the current varaiation (I) is expressed using the following equation.

Fig. 2-6 Load wire and inductance

In general, the wire inductance can be measured approximately 1 µH per 1 meter. If the 10 meters of load cables is wired between the EUT and the PLZ-4W with the current variation of 10 A/µs, the voltage generated by the wire inductance will be 100 V.

The negative polarity of the load input terminal is the reference potential of the external control signal, therefore, the device connected to the external control terminal may get malfunctioned.

When operating under the constant voltage (CV) mode or constant resistance (CR) mode or constant power (CP) mode, the load current is varied by the voltage at the load input terminal, so the operation can be affected easily by the generated voltage.

The wiring to the EUT should be twisted and the shortest as possible.

PLZ-4W Installation and Preparation 2-11

If the load wire is long or has a large loop, the wire inductance is increased. Conse-

Equipment under test

PLZ-4W Series Electronic Load

Keep the wire short

100 cm or less

Twi st

–

Example: R=10 Ω, C=100 μF

quently, the current variation at the time of switching operation will cause a large voltage drop.

When the value of instantaneous voltage drops under the minimum operating voltage depends on the generated voltage at the load input terminal, the response of recovery will be extensively delayed. In such event, the PLZ-4W may generate unstable oscillation or becomes into the hunting operation. In such condition, the input voltage may exceed the maximum input voltage and cause damage to the PLZ4W.

Voltage at the load input terminal

Current

Voltage at Load Input Terminal

When the voltage drops under minimum operating voltage, the electronic load may generate unstable oscillation or becomes into hunting operation.

ΔI

ΔT

Minimum operating voltage

Current

Example of waveform

Fig. 2-7 Waveform example: Generate unstable oscillation or hunting operation

You must be careful especially when the slew rate setting is high or switching is performed using large currents through parallel operation.

To prevent problems, connect the PLZ-4W and the equipment under test using the shortest twisted wire possible to keep the voltage caused by inductance within the minimum operating voltage and maximum input voltage range or set a low slew rate.

If the high-speed response operation is not required, set the lower response speed and decrease the slew rate setting.

In the case of DC operation also, the phase lag of the current may cause instability in the PLZ-4W control inducing oscillation. In this case also, connect the PLZ-4W and the equipment under test using the shortest twisted wire possible. If only DC operation is required, a capacitor and a resistor may be connected to the load input terminal as shown in Fig. 2-8 to alleviate oscillation. In this case, use the capacitor within its allowable ripple current.

Fig. 2-8 Length of wiring

2-12 Installation and Preparation PLZ-4W

■ Operation when the response speed is changed

CAUTION

Fig. 2-9 Overvoltage alarm

CAUTION

Equipment

under test

PLZ-4W Series Electronic Load

DC150 V

–

Fig. 2-11 Reverse connection alarm

You can change the response speed in CC mode (CC+CV mode) and CR mode (CR+CV mode).

In some cases, the wire inductance increases and the phase lag of the current may cause instability in the PLZ-4W control inducing oscillation.

In such case, you can decrease the response speed to assure stable operation.

• For a description of response speed, see section 5.15, “Response Speed.”

Overvoltage

• Do not apply voltage exceeding the maximum voltage of 150 VDC to the

The maximum voltage that can be applied to the load input terminal is 150 VDC. Voltage exceeding the maximum cannot be used.

If overvoltage is applied, an alarm message appears along with a beeping alarm, and the load is turned off. In this case, immediately lower the voltage of the equipment under test.

load input terminal, as it may cause damage.

Polarity

• If the polarity is reversed, overcurrent may damage the EUT and PLZ-4W.

Be sure to match the polarities between the load input terminal and the equipment under test.

Fig. 2-10 Connection by paying attention to the polarity

If the polarity is reversed, an alarm message appears along with a beeping alarm. In this case, turn off the power of the equipment under test within 30 seconds after the alarm is activated. (the beeping alarm sounds when a reverse voltage of 0.6 V or greater is applied).

PLZ-4W Installation and Preparation 2-13

2.8.2 Connection to the Load Input Terminal on the Rear

I10 line

I20 line

I25 line

I15 line

Cut the sleeve to match the wire diameter by using the gauge as a reference.

Lock plate

Insert the lock plate to the groove on the side of the terminal.

Panel

Using the terminal cover

The load input terminal cover that comes with the package is used by passing through the load wire.

If the wire that you are using is thick and cannot be passed through the cover sleeve (where the wire is passed through), cut and adjust the size of the sleeve to match the thickness of the wire.

Use trial and error so that you don't cut too much of the sleeve.

Fig. 2-12 Load input terminal cover

Attaching the lock plate

The lock plate is used to fix the load input terminal cover to the rear panel. Once attached, you do not have to remove it. When using the load input terminal

cover for the first time, attach the lock plate in advance.

Fig. 2-13 Attachment of the lock plate

2-14 Installation and Preparation PLZ-4W

Connection procedure of the load input terminal on the rear panel

WARNING

CAUTION

Bolt (M8 x 18)

Spring washer (M8)

Load input terminal cover

Nut (M8)

Crimp terminal

Be sure to use the set of screws provided with the package.

• Do not touch the load input terminal while the PLZ-4W is turned ON, as it

may lead to electric shock. In addition, be sure to use the load input terminal cover.

• The load input terminals on the front and rear panels are coupled inside

the PLZ-4W. A voltage applied to one end will appear on the other end.

• Do not connect equipment to the load input terminals on the front and rear

panels simultaneously, as it can cause damage.

• There is a danger of breakdown. Do not connect the equipment under test

to the load input terminal when the load is turned on.

• There is a danger of overheat. Attach crimping terminal to the wire and use

the set of screws that came with the package for connection.

Turn off the POWER switch.

Check that the output of the equipment under test is off.

Connect the load wire to the load input terminal on the rear panel.

Use the load input terminal cover. See Fig. 2-12 on how to use the cover. For the connection procedure of the load wire, see Fig. 2-14.

Fix the load input terminal cover to the rear panel using the lock plate.

Pass the inner pin of the lock plate through the hole on the side of the cover. For details, see Fig. 2-15.

Connect the load wire to the output terminal of the equipment under test.

Check the polarity of the connection.

Fig. 2-14 Connection to the load input terminal on the rear panel

PLZ-4W Installation and Preparation 2-15

Fig. 2-15 Attachment of the load input terminal cover

Move the cover until the edge touches the panel, and pinch the section indicated by the arrow to raise the side surface.

With the side surface of the cover raised, insert the lock plate pin into the hole.

Top view

Check that the left and right lock plate pins are securely inserted in the cover holes.

Removing the load input terminal cover.

Open the lock plate left and right, and remove the pin from the hole of the cover.

2-16 Installation and Preparation PLZ-4W

2.8.3 Connection to the Load Input Terminal on the Front Panel

WARNING

CAUTION

NOTE

Spring washer (M6)

Crimp terminal

Cover

Knob

Attach so that the wire passes through this section.

The load input terminal on the front panel can be used to easily connect the equipment under test and the PLZ-4W.

• Do not touch the load input terminal while the PLZ-4W is turned ON, as it

may lead to electric shock.

• The load input terminals on the front and rear panels are coupled inside

the PLZ-4W. A voltage applied to one end will appear on the other end.

• Do not connect equipment to the load input terminals on the front and rear

panels simultaneously, as it cause damage.

• There is a danger of breakdown. Do not connect the equipment under test

to the load input terminal when the load is turned on.

• There is a danger of overheat. Attach crimping terminal to the wire and use

the set of screws that came with the package for connection.

• The specifications of the PLZ-4W are for the load input terminal on the rear panel.

• The maximum input current to the load input terminal on the front panel is 66 A.

It is automatically limited to 66 A.

Turn off the POWER switch.

Check that the output of the equipment under test is off.

Connect the load wire to the load input terminal on the front panel.

For the connection procedure of the load wire, see Fig. 2-16.

Connect the load wire to the output terminal of the equipment under test.

5. Check the polarity of the connection.

PLZ-4W Installation and Preparation 2-17

Fig. 2-16 Connection to the load input terminal on the front panel

2-18 Installation and Preparation PLZ-4W

Chapter 3 For First Time Users

This chapter describes for first time users, the operation modes of the PLZ-4W and matters that users should be familiar with in operating the PLZ-4W.

PLZ-4W For First Time Users 3-1

3.1 What Is an Electronic Load

SWITCHING

165W

ELECTRONIC LOAD

1.5-150V 0-33A

PLZ164W

ENTER

SHORT

EDIT

SLEW RATE

RUN STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET VSET

LOCK

LOCAL

CURSOR

COARSE/FINE

SHIFT

ABC

OPP OCP

DEL

INS

DC INPUT

165W

1.5

150V

33A

REMOTE

I MON

OUTOUT

TRIG

POWER

DC INPUT

165W

1.5

150V

33A

REMOTE

I MON

OUTOUT

TRIG

SWITCHING

1000W

ELECTRONIC LOAD

1.5-150V 0-200A

PLZ1004W

ENTER

SHORT

EDIT

SLEW RATE

RUN STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET VSET

LOCK

LOCAL

CURSOR

COARSE/FINE

SHIFT

ABC

OPP OCP

DEL

INS

POWER

When measuring the characteristics of the power supply in designing a power supply, a load that is applied to the power supply is required. An electronic load refers to a device that uses semiconductors (transistors) in place of a variable resistor to act as a load. Because voltage and current can be controlled freely on a semiconductor, the load can be controlled arbitrarily by embedding a control circuit.

The electronic load is used as (1) a load for various electronic circuits, (2) a load for characteristics tests and life tests of various DC power supplies such as a switching power supply and primary and secondary batteries, and (3) a load for aging. The sequence function can be used to simulate the load tests of power supplies with large load fluctuation (such as a power supply for a printer) in a condition that is close to the actual load.

Fig.3-1 PLZ164W (1.5 V input type), PLZ164WA (0 V input type), and

PLZ334W (1.5 V input type)

Fig. 3-2 PLZ664WA (0 V input type) and PLZ1004W (1.5 V input type)

3-2 For First Time Users PLZ-4W

3.2 Basic Flow of Operation

This section runs through the precautions concerning installation and preparation, the use of the operation panel, and functions that are convenient for performing experiments and tests.

• For details on the precautions concerning installation and preparation, see chap-

ter 2, "Installation and Preparation.”

Preparations before using the PLZ-4W

Precautions to be taken when installing or moving the PLZ-4W

Be sure to read section 2.2, "Precautions Concerning Installation Location” when installing the PLZ-4W.

When moving the PLZ-4W, be sure to turn off the power and remove the power cord. When lifting the PLZ-4W, hold the handle on the side or top panel.

• Avoid using the PLZ-4W in a dusty environment, an environment

with poor ventilation, on an inclined surface, a location subject to vibrations, or a location subject to strong magnetic or electric fields.

• Do not obstruct the air inlet on the front panel and the air outlet on

the rear panel.

Always ground the PLZ-4W

Be sure to earth ground the PLZ-4W before turning on the power to prevent electric shock.

Precautions to be taken when connecting the equipment under test

• Be sure to turn off the power when touching the load input terminal

(front and rear panels) or when connecting the load. Be especially careful of the polarity of the connection between the load input terminal and the equipment under test.

• Use a load wire with sufficient diameter for the current as well as

non-flammable or flame-resistant cover.

• Do not connect equipment under test to the load input terminals on

the front and rear panels simultaneously.

On using the PLZ-4W

Precaution to be taken when turning on the power

Check that there are no irregularities in the input power supply or power cord before turning on the power. After connecting the power cord, turn on the POWER switch to turn on the PLZ-4W.

• Allow at least 5 seconds between power cycles.

• If you feel something is wrong with the PLZ-4W, turn off the power

switch. Then, remove the power plug from the outlet or remove the power cord from the PLZ-4W.

PLZ-4W For First Time Users 3-3

Warming up the PLZ-4W

CAUTION

0.00mA 0.000

0.000

0.000 A

0.01

mA/μs

SET

33A 150V

Fine adjustment

Coarse adjustment

NOTE

To perform stable measurements, allow the PLZ-4W to warm up for at least 30 minutes before starting tests. While the PLZ-4W is warming up, check the operation of the PLZ-4W and the connection of the equipment under test.

Voltage drop in the load wire

If the load wire is long, a voltage drop occurs due to the resistance of the cable. If the amount of voltage drop caused by the wire cannot be ignored or if you wish to set the resistance, voltage, and current accurately, execute remote sensing before making measurements. For the setup procedure of the remote sensing function, see section 6.7, "Remote Sensing Function.”

How to use the operation panel

The PLZ-4W is controlled from the operation panel on the front panel. If you make an invalid selection or perform an invalid key operation, a beep is sounded to notify the error. In particular, please familiarize yourself with the use of the SHIFT key that changes the key function.

• For a description of the functions of each key, see chapter 4, "Names and Func-

tions of Parts.”

• To prevent the possibility of electric shock, never touch the load

input terminal while the equipment under test is connected and the power is turned on. When touching the load input terminal, be sure to turn off the equipment under test.

■ Function of the LOAD key

If you press the LOAD key when the load is turned off, the LOAD LED illuminates, and the load turns on. If you press the LOAD key when the load is turned on, the LOAD LED turns off, and the load turns off.

• There is a danger of breakdown. Turn off the load when applying the out-

put of the equipment under test to the PLZ-4W. Then, turn the load on. If you are making the connection with the load turned on, be sure to turn off the output of the equipment under test. If a relay or electromagnetic switch is inserted between the load input terminal and the output terminal of the equipment under test, turn on the relay or electromagnetic switch when the load is turned off. Then, turn the load on.

■ How to use the rotary knob

The rotary knob is used when setting values such as the current and resistance. Turning the rotary knob to the right increases the value and turning it to the left decreases the value. In addition, you can press the rotary knob to switch between coarse adjustment and fine adjustment. When the “” shown at the upper right corner of the screen is large, coarse adjustment is active; when it is small, fine adjustment is active. When setting a value, use coarse adjustment to set the value roughly, and then switch to fine adjustment to set value precisely.

3-4 For First Time Users PLZ-4W

• You can traverse the full scale of values by turning the rotary knob ten and a few

turns. Fine adjustment changes values at 1/10 of the rate of coarse adjustment.

■ Pop-up menu operation

0.00mA0.000

0.000

SLEWRATE

0.000

0.01

mA/μs

SET

H 33A 150V

CR CV

Pop-up menu

Some keys show a pop-up menu when you press the key. If you press the key again while the menu is shown, the selected item switches. Each time you press the key, the selected item switches one by one to the next item. When you finish the key operation, the item at that point is selected, and the pop-up menu automatically clears.

■ How to use the SHIFT key

The SHIFT key is used to switch the function of each key. If you press a key without holding down the SHIFT key, the function indicated above the key is enabled; if you press a key while holding down the SHIFT key, the function indicated below the key is enabled.

For example, if you press the SET/VSET key without holding down the SHIFT key, the SET/VSET (indicated in black) function is enabled. If you press the SET/VSET key while holding down the SHIFT key, the MENU (indicated in blue) is enabled.

This manual denotes the operation of holding down a key while holding down the SHIFT key as SHIFT+(notation above the key). For example, when selecting the MENU key, this manual denotes it as MENU (SHIFT+SET/VSET). In this case, press the SET/VSET key while holding down the SHIFT key.

Saving the setup conditions

You can use the memory function to save the settings that you are using. The ABC preset memories can save three separate sets of settings of each range of each operation mode. The setup memory can save 100 sets of the current setup condition and the contents of the ABC preset memories in that condition. The information saved to the memory is backed up even when the power is turned off (the information is saved until the PLZ-4W is initialized).

• For a description of the ABC preset memories, see section 6.1, "ABC preset

memories.” For a description of the setup memory, see section 6.2, "Setup Memory.”

• For a description of initialization, see section 5.14, "Initialization.”

Performing waveform simulation

The sequence function is used to perform waveform simulation. The sequence function automatically executes the time change of the waveform specified arbitrarily one operation at a time. The program information that you create is backed up even when the power is turned off.

• For a description of the sequence function, see section 6.6, "Sequence Func-

tion.”

Maintenance and transportation after use

Before performing maintenance work, be sure to turn off the power and remove the power plug from the outlet or the power cord from the PLZ-4W.

• For details on maintenance, see chapter 8, "Maintenance and Calibration.”

• If the PLZ-4W requires repairs or readjustment, do not open the

outer cover by yourself. Contact your Kikusui agent.

• When transporting the PLZ-4W, remove the power cord and cables,

and use the original packing materials.

PLZ-4W For First Time Users 3-5

3.3 Operating area of the PLZ-4W

0.1

100

0.1 1 10 Input current [A]

Input voltage [V]

Actual operating area

165 W

150

1.5

0.3

1.1

Logarithmic scale

Operating area where specifications are guaranteed

0.5

0.3

010

Input current [A]

Input voltage [V]

Operating area where specifications are guaranteed

1.5

2.0

1.3

Actual operating area

Low voltage area

<1.5 V

Logarithmic scale

0.1

0.3

100

0.1 1 10

Input current [A]

Input voltage [V]

Operating area where specifications are guaranteed

165 W

150

1.1

0.5

0.3

010

Input current [A]

Input voltage [V]

Operating area where specifications are guaranteed

1.5

2.0

Low voltage area

As shown in Fig. 3-3, the PLZ-4W can be used within the area enclosed by the constant voltage line according to the rated voltage (L1), the constant power line according to the rated power (L2), the constant current line according to the rated current (L3), and the constant voltage line according to the minimum operating voltage (L4) (operating area where specifications are guaranteed). For PLZ-4Ws with the minimum operating voltage of 0 V, the specifications are guaranteed at input voltages at 0 V and greater. For 1.5 V input types, the specifications are guaranteed at input voltages of 1.5 V and greater. If the current is decreased, these types can be used even at voltages lower than 1.5 V. However, the specifications are not guaranteed. (Actual operating area)

Minimum voltage at which the current starts flowing to the PLZ-4W is approximately 0.3 V.

The PLZ-4W detects no signal at an input voltage less than or equal to approximately 0.3 V and an input current less than or equal to approximately 1 % of the range rating. If the input voltage is gradually increased from 0 V, no current will flow until 0.3 V is exceeded. Once a current greater than or equal to 1 % of the range rating (When PLZ-4W is set by the M range: greater than or equal to 1 % of H range) starts flowing, the current can flow at voltages less than equal to 0.3 V.

If the minimum operating voltage (L5) in the actual operating area is reached, the operating status on the display indicates C.R using outline characters (see section

4.4, "Display”).

PLZ164W

(1.5 V input type)

H range

PLZ164WA

(0 V input type)

H range

Fig. 3-3 Operating area

3-6 For First Time Users PLZ-4W

3.4 Basic Operation Modes

The following six operation modes are available on the PLZ-4W.

1. Constant current mode (CC mode)

2. Constant resistance mode (CR mode)

3. Constant power mode (CP mode)

4. Constant voltage mode (CV mode)

5. Constant current and constant voltage mode (CC+CV mode)

6. Constant resistance and constant voltage mode (CR+CV mode)

Below is a description of the most basic CC mode. For a detailed description, see appendix A.2, "Basic Operation Modes.”

3.4.1 Operation of the CC Mode

In CC mode, the current is kept constant even when the voltage changes.

■ CC mode operation

When the PLZ-4W is used in CC mode, the PLZ-4W operates as a constant current load as shown in Fig. 3-4. The PLZ-4W sinks the specified current (I) independent of the output voltage of the constant-voltage power supply (V1).

Constant-voltage

power supply

PLZ-4W Series

Electronic Load

Voltage [V]

Current is constant even when the voltage changes

Current [A]

CCsettingvalue

Fig. 3-4 Equivalent circuit of the constant current load and operation

■ Transition of the operating point

We will consider the case when checking the load characteristics of the constantvoltage power supply of Fig. 3-4 using CC mode.

PLZ-4W For First Time Users 3-7

Fig. 3-5 Transition of the operating point in CC mode (OPP trip point)

Input current [A]

Input voltage [V]

Logarithmic scale

(OPP setting)

Constant power line

Operating area

OPP trip point

NOTE

Fig. 3-5: Operation on segment AB

If the voltage of the constant-voltage power supply is set to V1 and the input current (load current) of the PLZ-4W is increased, the operating point moves along segment AB.

When point B is reached, overpower protection (OPP) trips. At this point, two types of operation are available on the PLZ-4W depending on the protection action setting of the OPP.

If the protection action is set to LOAD OFF, an alarm screen indicating OPP appears, and the load turns off.

If protection action is set to LIMIT, the operating status indicates OPP, and the PLZ4W sinks current as a constant power load at point B. Even if you attempt to increase the input current, the current is limited at point B. If you decrease the input current, the OPP is cleared, and the operating status indicates C.C. The PLZ-4W returns to CC mode, and the operating point moves along segment AB.

Table3-1 OPP action (protect action)

3-8 For First Time Users PLZ-4W

Fig. 3-5: Operation on segment CD

If the voltage of the constant-voltage power supply is set to V2 and the input current (load current) of the PLZ-4W is increased, the operating point moves along segment CD. Point D is the maximum current at the range being used.

• The OPP action (protection action) and the OPP value are set in advance. For a description of the action setting, see section 5.13, "Menu Setup.” For a description of the OPP value setting, see section 5.4, "Setting the Protection Function.” For a description of the operating status indication, see section 4.4, "Display.”

Point B

LOAD OFF

LIMIT

Turns off the load (stops the current flow). The PLZ-4W no longer operates as a load.

CC mode ends. OPP continues, and the PLZ-4W sinks current as a constant power load.

3.4.2 Let's Use CC Mode

SWITCHING

165W

ELECTRONIC LOAD

1.5-150V 0-33A

PLZ164W

ENTER

SHORT

EDIT

SLEW RATE

RUN STOP

UVP

PAUS E

STORE

RECALL

ABC

LOAD

Th/TL

FREQ DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET VSET

LOCK

LOCAL

CURSOR

COARSE/FINE

SHIFT

ABC

OPP OCP

DEL

INS

REMOTE

I MON

OUTOUT

TRIG

SWITCHING

165W

ELECTRONIC LOAD

1.5-150V 0-33A

PLZ164W

ENTER

SHORT

EDIT

SLEW RATE

RUN STOP

UVP

PAUS E

STORE

RECALL

ABC

LOAD

Th/TL

FREQ DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET/ VSET

LOCK

LOCAL

CURSOR

COARSE/FINE

SHIFT

ABC

OPP/ OCP

DEL

INS

POWER switch

LOAD key

RANGE/VRANGE key

MODE key

Rotary knob

OPP/OCP

key

SET/VSET

key

NOTE

This section describes the procedure of setting the operation mode to CC and turning on the load. Below is the flow of the operating procedure. Please familiarize yourself with the keys used in this procedure.

■ Operating procedure and operation panel

1) Turn on the power and check that the load is turned off.

2) Set the operation mode, range, current value, and the OPP value.

3) Turn on the load.

4) Change the current value.

5) Turn the load off.

Fig. 3-6 Keys used in CC mode

■ Explanation of the operation

1. Turn on the power.

Push the ( ) side of the POWER switch to turn on the power to the PLZ-4W. Check that the LOAD LED is turned off. If the LED is illuminated, press the LOAD key to turn off the load.

• When the load is turned ON, you cannot switch the operation mode and range.

PLZ-4W For First Time Users 3-9

2. Select CC mode.

0.00mA0.000

0.000

SLEWRATE

0.000

0.01

mA/μs

SET

H 33A 150V

CR CV

0.00mA0.000

0.000

SLEWRATE

1.000

0.01

mA/μs

SET

H 33A 150V

LM0.33A

3.3A

33A

0.00mA0.000V

0.000W

0.000

SET

H 33A 150V

181.5

OPP

Press the MODE key to show the operation mode pop-up menu. If CC is not highlighted, press the MODE key repetitively until CC is high-

lighted. When the pop-up menu closes, check that CC appears on the display.

Select the current range.

Press the RANGE key to show the current range pop-up menu. Each time you press the RANGE key while the menu is displayed, the current

range switches in the order L (LOW), M (MIDDLE), and H (HIGH). When the desired range is highlighted, stop pressing the key.

Along with L, M, or H, the full scale value of the respective range is displayed. This value varies depending on the model.

Select the voltage range.

Press the VRANGE (SHIFT+RANGE) key to show the voltage range pop-up menu.

Each time you press the VRANGE key while the menu is displayed, the voltage range switches between 15 V and 150 V. When the desired range is highlighted, stop pressing the key.

Set the current value.

Press the SET/VSET key to illuminate the SET/VSET key. While viewing the display, turn the rotary knob. You can press the rotary knob to switch between coarse adjustment and fine

adjustment. First, use coarse adjustment to roughly set the value, and then switch to fine adjustment to adjust the value precisely.

Set the OPP value.

Press the OPP/OCP key to illuminate the OPP/OCP key and show the OPP value on the display.

While viewing the display, turn the rotary knob. You can press the rotary knob to switch between coarse adjustment and fine

adjustment. First, use coarse adjustment to roughly set the value, and then switch to fine adjustment to adjust the value precisely.

Turn on the load.

Press the LOAD key to illuminate the LOAD LED and allow the current to flow.

At this point, the display shows the measured values (current, voltage, and power) at the load input terminal.

Change the current setting.

Turn the rotary knob while the load is turned on to change the current setting. However, the current value cannot be set greater than the maximum value of

the selected range.

Turn off the load.

Press the LOAD key to turn off the LOAD LED.

3-10 For First Time Users PLZ-4W

Chapter 4 Names and

Functions of Parts

This chapter describes the names and functions of switches, connectors, and displays on the front panel and rear panel.

PLZ-4W Names and Functions of Parts 4-1

4.1 Front Panel

WARNING

CAUTION

SWITCHING

165W

ELECTRONIC LOAD

1.5-150V 0-33A

PLZ164W

ENTER

SHORT

EDIT

SLEW RATE

RUN /STOP

UVP

PAUS E

STORE

RECALL

ABC

LOAD

Th/TL

FREQ /DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET /VSET

LOCK

LOCAL

CURSOR

COARSE/FINE

SHIFT

ABC

OPP /OCP

DEL

INS

DC INPUT

165W

1.5

150V

33A

REMOTE

I MON

OUTOUT

TRIG

[1] DC INPUT

[5] I MON OUT

[6] TRIG OUT

[7] REMOTE

[4] POWER

[2] Air intake [3] Handle

• Do not touch the load input terminal while the PLZ-4W is turned ON, as it may lead to electric shock.

In addition, be sure to use the load input terminal cover.

• The load input terminals on the front and rear panels are coupled inside the PLZ-4W. A voltage applied to one end will appear on the other end.

• Do not connect equipment to the load input terminals on the front and rear panels simultaneously, as it cause damage.

• Avoid using the PLZ-4W in a dusty environment or an environment with poor ventilation.

• Do not obstruct the air intake on the front panel and the air outlet on the rear panel.

4-2 Names and Functions of Parts PLZ-4W

Fig.4-1 Front panel (PLZ164W)

[1] DC INPUT (load input terminal on the front panel)

NOTE

The terminal on the front panel that can be used to easily connect the equipment under test and the PLZ-4W. The load input terminal is also available on the rear panel, and is connected in parallel with the load input terminal on the front panel.

• For the connection procedure, see section 2.8.3, “Connection to the Load Input Terminal on the Front Panel.”

• The specifications of the PLZ-4W are for the load input terminal on the rear panel.

The load input terminal on the front panel may not satisfy the specifications.

• The maximum input current to the load input terminal on the front panel is 66 A.

It is automatically limited to 66 A.

[2] Air intake (louver)

Takes in air to cool the inside of the PLZ-4W. A dust filter is furnished on the inside. Clean the dust filter periodically.

• For details, see section 8.1.2, “Cleaning the Dust Filter.”

[3] Handle

Used to lift the PLZ-4W. The handle is provided on the side panel on the PLZ1004W and the PLZ664WA. It is provided on the top panel on other models.

[4] POWER switch

Power switch of the PLZ-4W. Push ( ) to turn on, push ( ) to turn off. Turn the POWER switch on while holding down the ENTER key initializes the

panel settings to factory default.

• For a description of turning on the power, see section 2.6, “Turning on The Power.”

• For a description of initial settings, see section 5.14, “Initialization.”

[5] I MON OUT connector

Output connector used to monitor the current. Connect a voltmeter or oscilloscope to monitor the current.

• For details, see section 6.9, “Monitor Signal Output.”

[6] TRIG OUT connector

Outputs pulse signals during sequence operation or switching operation.

• For details, see section 6.9, “Monitor Signal Output.”

[7] REMOTE connector

Connector for future functional expansion.

PLZ-4W Names and Functions of Parts 4-3

4.2 Rear Panel

WARNING

CAUTION

AC INPUT

100-240V 47

63Hz

160VA MAX

KCC-REM-KEJ

PLZ-78270 2012/05

AC INPUT

100-240V 47

63Hz

160VA MAX

[1] DC INPUT

[4] Remote sensing terminal

[7] RS232C

[6] GPIB

[8] USB

[3] AC INPUT

[5] Manufacturing number

[2] Air outlet

[9] J1/J2

[10] EXT CONT

• Do not touch the load input terminal while the PLZ-4W is turned ON, as it may lead to electric shock.

In addition, be sure to use the load input terminal cover.

• The load input terminals on the front and rear panels are coupled inside the PLZ-4W. A voltage applied to one end will appear on the other end.

• Do not connect equipment to the load input terminals on the front and rear panels simultaneously, as it cause damage.

• Avoid using the PLZ-4W in a dusty environment or an environment with poor ventilation.

• Do not obstruct the air intake on the front panel and air exhaust on the rear panel with objects. In particular, allow at least 20 cm of space behind the PLZ-4W.

Fig. 4-2 Rear panel (PLZ164W)

4-4 Names and Functions of Parts PLZ-4W

[1] DC INPUT (load input terminal on the rear panel)

Terminal used to connect the equipment under test to the PLZ-4W. It is connected in parallel with the load input terminal on the front panel.

• For the connection procedure, see section 2.8.2, “Connection to the Load Input Terminal on the Rear Panel.”

[2] Air outlet

Exhausts the internal air using the cooling fan to cool the inside of the PLZ-4W.

[3] AC INPUT connector

Connector used to connect the power cord.

• For a description of the connection, see section 2.4, “Connecting the Power Cord.”

[4] Remote sensing terminal

Terminal used to connect the sensing wires when correcting the voltage drop caused by the resistance of the load wire.

• For details, see section 6.7, “Remote Sensing Function.”

[5] Manufacturing number (serial No.)

Manufacturing number of the PLZ-4W.

[6] GPIB connector

Connector used to connect the GPIB cable when controlling the PLZ-4W externally.

• For a description of the interface setup, see section 7.2.1, “GPIB Control.”

[7] RS232C connector

Connector used to connect the RS232C cable when controlling the PLZ-4W externally.

• For a description of the interface setup, see section 7.2.2, “RS232C Control.”

[8] USB connector

Connector used to connect the USB cable when controlling the PLZ-4W externally.

• For a description of the interface setup, see section 7.2.3, “USB Control.”

[9] J1/J2 connector

Input/Output connector used to control the PLZ-4W externally using external voltage, resistance, relay contact, etc.

J1 is assigned to external control; J2 is assigned to parallel operation.

• For details on external control and the connector, see section 6.8.1, “Overview and Precaution of External Control.”

[10] EXT CONT

Variable resistor used to adjust the full scale and offset settings of the PLZ-4W with respect to the input value of the external control source (voltage or resistance).

PLZ-4W Names and Functions of Parts 4-5

4.3 Operation Panel

SWITCHING

165W

ELECTRONIC LOAD

1.5-150V 0-33A

PL Z164W

ENTER

SHORT

EDIT

SLEW RATE

RUN STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET VSET

LOCK

LOCAL

CURSOR

COARSE/FINE

SHIFT

ABC

OPP OCP

DEL

INS

[1] LOAD

[5] SHIFT

[4] LOCAL/LOCK

[3] CURSOR

[2] Rotary knob

If you press a key while holding down the SHIFT key, the function indicated below the key is enabled.

NEX

Fig. 4-3 Operation Panel

[1] LOAD key

The current that flows through the PLZ-4W is turned on and off each time you press the key. When the load is turned on, the LED illuminates (green).

[2] Rotary knob

The rotary knob is used to set various types of values on the PLZ-4W. By pressing the rotary knob you can switch between coarse adjustment and fine adjustment.

COARSE/FINE

When set to coarse adjustment, “ ” appears on the screen. You can traverse the full scale of values by turning the rotary knob ten and a few turns When set to fine adjustment, “ ” appears. The value changes at 1/10 of the rate of coarse adjustment.

Contrast

You can change the display contract by turning the rotary knob while holding down the SHIFT key.

[3] CURSOR key

Moves the cursor up and down or right and left when selecting an item on the menu

4-6 Names and Functions of Parts PLZ-4W

screen.

INS/DEL/PREV/NEXT

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ /DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP /OCP

[10] OPP OCP/UVP

[9] SLEW RATE/SHORT

[8] RANGE/VRANGE

[7] SET VSET/MENU

[6] MODE/+CV

T/VS

Operate the keys while holding down the SHIFT key to turn pages (PREV/NEXT) on the menu screen or insert (INS) or delete (DEL) steps of the sequence function.

[4] LOCAL/LOCK key

LOCAL

Switches to panel control (local control) when the PLZ-4W is being controlled remotely.

LOCK

Pressing this key while holding down the SHIFT key (SHIFT+LOCAL) locks the PLZ-4W. Pressing the LOCK (SHIFT+LOCAL) key while the PLZ-4W is locked releases the lock. When releasing the lock, keep holding the key until a beep is heard.

• For details, see section 5.11, “Lock Function.”

[5] SHIFT key

Switches the function of each key. If you press a key without holding down the SHIFT key, the function indicated above the key is enabled; if you press a key while holding down the SHIFT key, the function indicated below the key is enabled.

[LOAD]

MENUVRAN

HORTV

Fig. 4-4 Operation panel (LOAD)

[6] MODE/+CV key

MODE

Pressing this key when the load is turned off switches the operation mode. Press the MODE key to show the operation mode pop-up menu. Each time you

press the MODE key while the menu is displayed, the operation mode switches in the order CC, CR, CV, and CP.

When in switching mode (SW ON key is illuminated) or CC+CV or CR+CV mode, you cannot select the CV and CP operation modes on the pop-up menu. You cannot select the operation mode when the short function is enabled.

PLZ-4W Names and Functions of Parts 4-7

+CV

Pressing this key while holding down the SHIFT key (SHIFT+MODE) adds constant voltage mode (+CV) to CC mode or CR mode.

When in CC mode, this operation switches the mode to CC+CV; when in CR mode, this operation switches the mode to CR+CV. The current mode is indicated on the display.

[7] SET/VSET/MENU key

SET/VSET

Enters the basic setting (current, conductance, voltage, or power). This key illuminates when you can change the basic setting.

In CC+CV mode, current and voltage are selected alternately each time you press the key. In CR+CV mode, conductance and voltage are selected alternately each time you press the key.

Pressing this key while holding down the SHIFT key (SHIFT+SET VSET) shows the menu setup screen for setting the functions of the PLZ-4W and changing the settings.

• For details, see section 5.13, “Menu Setup.”

[8] RANGE/VRANGE key

RANGE

Switches the current, conductance, or voltage range according to the operation mode.

Pressing the RANGE key when the load is turned off shows the range pop-up menu. Each time you press the RANGE key while the menu is displayed, the range switches in the order L, M, and H. You cannot select the range when the load is turned on or when the short function is enabled.

VRANGE

Pressing this key while holding down the SHIFT key (SHIFT+RANGE) switches the voltage range.

Pressing the VRANGE (SHIFT+RANGE) key when the load is turned off shows the range pop-up menu. Each time you press the VRANGE (SHIFT+RANGE) key while the menu is displayed, the range switches in the order 15 V and 150 V. You cannot select the range when the load is turned on or when the short function is enabled.

[9] SLEW RATE/SHORT key

SLEW RATE

Sets the slew rate value. This key illuminates when you can change the slew rate. You cannot select the slew rate in CV or CP mode.

• For details, see section 6.4, “Setting the Slew Rate.”

SHORT

Pressing this key while holding down the SHIFT key (SHIFT+SLEW RATE) sets or clears the short function. A short icon is displayed while the short function is enabled. You cannot select the short function in switching, CV, or CP mode.

• For details, see section 5.12, “Short Function.”

4-8 Names and Functions of Parts PLZ-4W

[10] OPP/OCP/UVP key

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ /DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP /OCP

[11] SW ON

[12] FREQ DUTY/Th

[13] LEVEL/%

Th/TL

OPP/OCP

Sets the voltage for tripping the overpower protection (OPP) or the current for tripping the overcurrent protection (OCP). This key illuminates when you can set the OPP or OCP.

• For details, see section 5.4, “Setting the Protection Function.”

UVP

Pressing this key while holding down the SHIFT key (SHIFT+OPP/OCP) enables you to set the voltage for tripping the undervoltage protection (UVP).

• For details, see section 5.4, “Setting the Protection Function.”

[SWITCHING]

SW O

Fig. 4-5 Operation panel (SWITCHING)

[11] SW ON key

Turns on or off the switching mode. The switching mode is valid in CC mode or CR mode. The SW ON key illuminates in switching mode. You cannot select switching mode when the short function is enabled.

• For details, see section 6.3, “Switching Function.”

[12] FREQ/DUTY/Th/TL key

FREQ/DUTY

Sets the switching frequency and duty cycle in switching operation. This key illuminates when you can set the switching frequency or duty cycle. FREQ and DUTY settings switch each time you press the key.

Th/TL

Pressing this key while holding down the SHIFT key (SHIFT+FREQ DUTY) enables you to set the switching time (Th: High side, TL: Low side) in switching operation. This key illuminates when you can change the switching time. Th and TL settings switch each time you press the key. You cannot select the switching time in CV or CP mode.

PLZ-4W Names and Functions of Parts 4-9

[13] LEVEL/% key

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ /DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP /OCP

[16] A/EDIT

[17] B/RUN STOP

[18] C/PAUSE

[15] ENTER

[14] RECALL/STORE

LEVEL

Sets the switching level in switching operation. This key illuminates when you can change the switching level.

Pressing this key while holding down the SHIFT key (SHIFT+LEVEL) enables you to set the switching level in terms of a percentage (0.0 % to 100.0 %) of the current setting. This key illuminates when you can change the switching level. You cannot select the switching level in CV or CP mode.

[PRESET/SEQ]

TORE

Fig. 4-6 Operation panel (PRESET/SEQ)

[14] RECALL/STORE key

RECALL

Recalls the panel settings saved to the setup memory. You cannot select this key when the load is turned on.

• For details, see section 6.2, “Setup Memory.”

STORE

Pressing this key while holding down the SHIFT key (SHIFT+RECALL) saves the current panel settings to the setup memory.

4-10 Names and Functions of Parts PLZ-4W

[15] ENTER/ABC key

ENTER

Confirms various types of values during menu setup.

• Pressing the ENTER key when an alarm is activated resets the alarm. However, the alarm will be activated again if you do not correct the cause of the alarm.

ABC

Pressing this key while holding down the SHIFT key (SHIFT+ENTER) saves the current settings to the ABC preset memories.

• For details, see section 6.1, “ABC preset memories.”

[16] A/EDIT key

Use this key to recall the settings stored in memory A or save the current settings to memory A.

EDIT

Pressing this key while holding down the SHIFT key (SHIFT+A) shows the sequence edit screen.

• For details, see section 6.6, “Sequence Function.”

[17] B/RUN/STOP key

Use this key to recall the settings stored in memory B or save the current settings to memory B.

RUN/STOP

Pressing this key while holding down the SHIFT key (SHIFT+B) shows the sequence execution screen. Pressing RUN/STOP (SHIFT+B) when sequence operation is being executed aborts the operation.

[18] C/PAUSE key

Use this key to recall the settings stored in memory C or save the current settings to memory C.

PAUSE

Pressing this key while holding down the SHIFT key (SHIFT+C) pauses the sequence being executed. Pressing the PAUSE (SHIFT+C) key when the operation is paused resumes the sequence.

PLZ-4W Names and Functions of Parts 4-11

4.4 Display

0.00mA 0.000V

0.000W

SLEWRATE

0:06:23

0.000

0.01

mA/μs

SET

H 33A 150V

C . C

[1] Range display [2] Status display

[3] Measured value display

[5] Elapsed time display

[7] Basic setting display

[8] Multi display

[4] Operation status display

[6] Operation mode display

33A

You can change the display contract by turning the rotary knob while holding down the SHIFT key. The contrast setting is backed up even when the power is turned off.

Fig. 4-7 Display

[1] Range display

Displays the current and voltage range.

LEWRATE

[2] Status display

Displays (from the left) the lock, remote, and rotary knob coarse/fine adjustment status.

[3] Measured value display

Displays the measured values of current (A), voltage (V), and wattage (W).

[4] Operation status display

Displays the current operation mode when the load is turned on.

[5] Elapsed time display

Displays the elapsed time since the load was turned on. By factory default, the elapsed time display (Count Time) is turned off (not shown).

To show the elapsed time, turn it on from the menu settings. You can also automatically turn off the load after a specified time elapses after the load is turned on (Cut Off).

• For details of menu setup, see section 5.13, “Menu Setup.”

[6] Operation mode display

Displays the specified operation mode.

[7] Setup display

4-12 Names and Functions of Parts PLZ-4W

Displays the basic setting in the specified operation mode.

[8] Multi display

Displays various settings and current status according to the condition.

Chapter 5 Basic Operation

This chapter describes the operating procedure of each operation mode and other basic functions.

PLZ-4W Basic Operation 5-1

5.1 Panel Control Basics

0.00mA0.000

0.000

SLEWRATE

0.000 A

0.01

mA/μs

SET

H 33A 150V

Fine adjustment

0.000

mA/μs

Coarse adjustment

NOTE

0.00mA0.000

0.000

SLEWRATE

0.000 A

0.01

mA/μs

SET

H 33A 150V

CR CV

Pop-up menu

• For a description of the functions of each key, see chapter 4, “Names and Functions of Parts.”

■ Function of the LOAD key

■ How to use the rotary knob

The rotary knob is used when setting values such as the current and resistance. Turning the rotary knob to the right increases the value and turning it to the left decreases the value. In addition, you can press the rotary knob to switch between coarse adjustment and fine adjustment. When the  shown at the upper right corner of the screen is large, coarse adjustment is active; when it is small, fine adjustment is active. When setting a value, use coarse adjustment to set the value roughly, and then switch to fine adjustment to set value precisely.

• Fine adjustment changes values at 1/10 of the rate of coarse adjustment. When

you turn the rotary knob while pressing the LOCAL key in the coarse adjustment, you can set the value more roughly.

■ Pop-up menu operation

Some keys show a pop-up menu when you press the keys. If you press the key again while the menu is shown, the selected item switches. Each time you press the key, the selected item switches one by one to the next item. When you finish the key operation, the item at that point is selected, and the pop-up menu automatically clears.

■ How to use the SHIFT key

This manual denotes the operation of pressing a key while holding down the SHIFT key as SHIFT + (notation above the key). For example, when selecting the MENU key, this manual denotes it as MENU (SHIFT + SET/VSET). In this case, press the SET/VSET key while holding down the SHIFT key.

5-2 Basic Operation PLZ-4W

5.2 Turning On or Off the Load

CAUTION

“Turning on the load” refers to the operation of supplying current to the PLZ-4W. “Turning off the load” refers to the operation of cutting off the current to the PLZ4W. The LOAD key is used to turn on or off the load. Please remember the expression “turning on the load” and “turning off the load”, as they are used frequently in this manual.

• When the step-by-step procedure to turning on/off the load was incorrectly performed, it may cause the damage to the PLZ-U. Be sure to follow the procedure as instructed to turning on/off the load.

Load On

1. Check that load is turned off.

Apply the output of the DUT to the input of the PLZ-U. In case the relay or the electromagnetic switch is used for the connection between the load input terminal and the output terminal of the DUT, turn on the relay or the electromagnetic switch.

Press the LOAD key to turn on the load.

Load Off

1. Press the LOAD key to turn off the load.

Turn off the output of the DUT. In case the relay or the electromagnetic switch is used for the connection between the load input terminal and the output terminal of the DUT, turn on the relay or the electromagnetic switch.

Functions related to turning on or off of the load

The PLZ-4W provides the following functions related to the turning on or off of the load.

■ Starting with the load turned on

By factory default, the load is not turned on unless you press the LOAD key after turning on the POWER switch.

If you select “2. Configuration” | “2. Power On” from the menu and set the Load On setting to on, the load is turned on when you turn on the POWER switch.

• For a description of changing the menu setup, see section 5.13, “Menu Setup.”

PLZ-4W Basic Operation 5-3

■ Displaying the elapsed time after the load is turned on

By default, the elapsed time after the load is turned on is not displayed. If you select “1. Setup” | “1. Function” from the menu and set the Count Time set-

ting to on, the time from load on to load off can be displayed. This function is useful when used in conjunction with the UVP in the discharge test

of batteries and capacitors.

• For a description of changing the menu setup, see section 5.13, “Menu Setup.”

■ Turning off the load after a specified time elapses

By default, the load on timer is off. If you select “1. Setup” | “4. Cut Off” from the menu and set the time in “Time,” the

load automatically turns off after a specified time elapses after the load is turned on. When the load turns off, a pop-up window appears indicating the input voltage at

the time the load was turned off. This function is useful in discharge tests of batteries and capacitors.

• For a description of changing the menu setup, see section 5.13, “Menu Setup.”

■ Turning on or off the load externally

You can also turn on or off the load using an external signal through a relay or other similar methods.

• For a description of external control, see section 6.8.7, “External Control of Load On and Load Off.”

■ Starting up the input current of the PLZ-4W responds to follow

the rise time of the output voltage

In the constant current (CC) mode and the constant resistance (CR) mode, you can set to start up slowly of the input current of the load (soft start).

• For a description of soft-start, see section 5.10, “Soft start.”

5-4 Basic Operation PLZ-4W

When the DC power supply and the DUT are connected in series,

PLZ164WA PLZ664WA

DC power supply

DUT

Load input terminal

and turning on/off of the DUT. (PLZ164WA/PLZ664WA only)

The following describes for testing the DUT (in CC mode) when the DUT (an openclose device such as a switch) is connected between the load input terminal of the PLZ-4W and the output of the DC power supply.

Fig.5-1 Connecting the DC power supply and the DUT in series

As for the type of 0 V input model PLZ164WA/PLZ664WA, when the connection between the DC power supply and the PLZ164WA/PLZ664WA is opened circuit, a reverse voltage is applied to the load input terminal, and the alarm is occurred to turn off the load by the reverse-connection detection (REV). For the REV, see section 5.3, “Types of Protection Functions.”

■ To avoid the occurance of alarm by the reverse-connection detection (REV)

To avoid the occurrence of alarm by the REV, set the operation mode to the "CC+CV" mode, then it is necessary to set the voltage value of the CV at lower than the voltage "V" specified in the Fig. 5-1 when the current flows. The alarm can not be avoided in the CC mode. For the operation mode, see section 5.5, “Operation Modes.”

Turn off the DUT.

Set the operation mode of the PLZ-4W to the "CC+CV" mode.

Set the voltage of the CV for approximately 1 V lower than the output voltage of the DC power supply.

For the setting of voltage, see “Operating procedure of CC+CV mode” in section 5.6, “CC Mode.”

Set the current of the CC complied to the condition of the DC power supply.

Press the LOAD key to turn on the load.

Turn on the output of the DC power supply.

Turn on the DUT.

Turn off the DUT when the test is finished.

Even when you follow the procedure specified above, the alarm may occurs, in such case, it may be required to change the voltage setting of CV to prevent the alarm occurance. For details, contact your Kikusui agent or distributor.

PLZ-4W Basic Operation 5-5

5.3 Types of Protection Functions

The protection function automatically turns off or limits the load when an input that can damage the internal circuit of the PLZ-4W appears and to protect the equipment under test.

When a protection function trips, an alarm is activated. When an alarm is activated, the load is turned off (or limited), and the ALARM STATUS of the J1 connector on the rear panel (pin 16) turns on (open collector output by a photocoupler).

There are two types of protection functions: those that allow you to set the trip point and those with a fixed trip point. In addition, for the OCP and the OPP, you can specify whether to turn off or limit the load when the protection trips.

• For the operation of the protection function in each operation mode, see appendix A.2, “Basic Operation Modes.”

Overcurrent protection (OCP)

The protection trips when a current that is equal to or exceeds the specified overcurrent value or 110 % of the maximum current of each range flows. At this point, the load is turned off (LOAD OFF) or the current is limited (LIMIT).

To change the protect action, select “1. Setup” | “2. Protect Action” | “OCP” and specify LIMIT or LOAD OFF.

When LIMIT is specified, the alarm is cleared when the alarm condition is corrected.

• For a description of setting the overcurrent value, see section 5.4, “Setting the Protection Function.”

• For a description of changing the menu setup, see section 5.13, “Menu Setup.”

Overvoltage protection (OVP)

The protection trips when a voltage that is equal to or exceeds 110 % of the maximum input voltage is applied. At this point, the load is turned off.

Overpower protection (OPP)

The protection trips when a power that is equal to or exceeds the specified overpower value or 110 % of the maximum power of each range is applied. At this point, the load is turned off (LOAD OFF) or the current is limited (LIMIT).

To change the protect action, select “1. Setup” | “2. Protect Action” | “OPP” and specify LIMIT or LOAD OFF.

When LIMIT is specified, the limit is cleared when the alarm condition is corrected.

• For a description of setting the overpower value, see section 5.4, “Setting the Protection Function.”

• For a description of changing the menu setup, see section 5.13, “Menu Setup.”

5-6 Basic Operation PLZ-4W

Undervoltage protection (UVP)

The protection trips when the voltage that is equal to or falls below the specified voltage. At this point, the load is turned off. The undervoltage protection can be disabled (OFF).

• For a description of setting the undervoltage value, see section 5.4, “Setting the Protection Function.”

Reverse-connection detection (REV)

The protection trips when a reverse voltage is applied to the load input terminal. At this point, the load turns off.

In this case, turn off the power of the equipment under test within 30 seconds after the protection detects a reverse voltage.

For the PLZ164WA or the PLZ664WA, when the REV activates while the test connecting with the DC power supply and the DUT in series, see “When the DC power supply and the DUT are connected in series, and turning on/off of the DUT. (PLZ164WA/PLZ664WA only)” in section 5.2, “Turning On or Off the Load.”

Overheat protection (OHP)

The protection trips when the temperature inside the power unit exceeds 95C. At this point, the load is turned off.

Check whether the air intake on the front panel and the air outlet on the rear panel are being obstructed.

Alarm input protection

The protection trips when a low level (TTL) signal is applied to the ALARM INPUT (pin 10) of the J1 connector on the rear panel.

Reset the alarm on the equipment connected to external control, and then reset the alarm on the PLZ-4W.

■ Clearing alarms

You can press the ENTER key when an alarm is activated to reset the alarm. However, note that the alarm will be activated again, if the cause of the alarm is not corrected.

PLZ-4W Basic Operation 5-7

5.4 Setting the Protection Function

You can set trip points for the OCP, OPP, and UVP.

■ Setting the OPP and OCP

The OPP and the OCP activate an alarm and turn off the load or limit the power or current when overpower or overcurrent occurs. When LOAD OFF is specified, a pop-up window appears when an alarm is activated.

By default, the PLZ-4W is set up to limit the power or current. The protect action is specified from the menu.

• For a description of changing the menu setup, see section 5.13, “Menu Setup.”

With the load turned off, check the operation mode.

OCP is not indicated in CC mode. OPP is not indicated in CP mode.

Select OPP or OCP.

Press the OPP/OCP key.

The OPP/OCP key illuminates.

Select the one you wish to set.

Select OPP or OCP. OPP or OCP is highlighted each time you press the OPP/OCP key. Highlight

the one you wish to set.

Set the overpower or overcurrent value.

While viewing the display, turn the rotary knob to set the value.

■ Setting the UVP

When the input voltage that is equal to or falls below the specified value, an alarm is activated, the load is turned off, and a pop-up window appears. If the Count Time setting is on, the time from load on to load off is displayed in the pop-up window.

Select UVP.

Press the UVP (SHIFT+OPP/OCP) key.

The UVP key illuminates.

Set the undervoltage value.

While viewing the display, turn the rotary knob to set the value. If you are not using the undervoltage protection, select OFF.

5-8 Basic Operation PLZ-4W

5.5 Operation Modes

CC＋CV CR＋CV

CR CV CP

（MODE）

（MODE）（MODE）

（MODE）（MODE）（MODE）

（＋CV）（＋CV）

NOTE

The following four operation modes are available on the PLZ-4W. Furthermore, constant voltage mode (+CV) can be added to CC and CR modes.

• Constant current mode (CC mode and CC+CV mode)

• Constant resistance mode (CR mode and CR+CV mode)

• Constant voltage mode (CV mode)

• Constant power mode (CP mode)

■ Switching operation modes

You can switch the operation mode by pressing the MODE key when the load is turned off. Press the MODE key to show the operation mode pop-up menu. Each time you press the MODE key while the menu is displayed, the selected item switches one by one to the next item.

When you finish the key operation, the operation mode at that point is selected, and the pop-up menu automatically clears. The operation mode is indicated on the display.

By pressing +CV (SHIFT+MODE) in CC mode or CR mode, you can add CV mode.

The figure below shows the transition of operation modes.

PLZ-4W Basic Operation 5-9

Fig. 5-2 Transition of operation modes

• You can add +CV mode even when the load is turned on.

5.6 CC Mode

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

In CC mode, you set the current [A]. You can also add +CV mode to CC mode.

Overview of the procedure

Select the operation mode, and set the current value. Turn on the load and change the current value. Finally, turn off the load to cut off the current.

Preparation Main operation Unit behavior

Check that the load is turned off. Set the operation mode.

■ Operating procedure of CC mode

Fig. 5-3 Keys used in CC mode

Check that the load is turned off.

Check that the LOAD LED is turned off. If it is on, press the LOAD key to turn it off.

Select the operation mode.

Press the MODE key.

Press the MODE key repetitively until CC is highlighted on the menu. After selecting the operation mode, check that CC is indicated on the display.

Turn on the load. Change the current value. Turn off the load.

An operation mode pop-up menu appears.

The display shows the voltage, current, and wattage at the load input terminal.

Select the current range.

Press the RANGE key.

A current range pop-up menu appears.

Each time you press the RANGE key while the menu is displayed, the range switches in the order L, M, and H.

When the desired range is highlighted, stop pressing the key. Along with L, M, or H, the full scale value of the respective range is displayed.

This value varies depending on the model.

5-10 Basic Operation PLZ-4W

4. Select the voltage range.

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

Press the VRANGE (SHIFT+RANGE) key.

A voltage range pop-up menu appears.

Each time you press the VRANGE key, the voltage range switches between 15 V and 150 V.

When the desired range is highlighted, stop pressing the key.

Set the current value.

Check that the display is in the basic setting entry condition (the characters “SET” is highlighted).

While viewing the display, turn the rotary knob. First, use coarse adjustment to roughly set the value, and then switch to fine

adjustment to adjust the value precisely.

Turn on the load.

Press the LOAD key.

The LOAD LED illuminates, and the current flows.

The display shows the measured values (voltage, current, and wattage) at the load input terminal.

Change the current setting.

Turn the rotary knob to change the current setting. The current value cannot be set greater than the maximum value of the selected

range.

Turn off the load.

Press the LOAD key.

The LOAD LED turns off, and the current is cut off.

■ Operating procedure of CC+CV mode

Fig. 5-4 Keys used in CC+CV mode

Check the operation mode.

Check that CC is indicated on the display.

Select the operation mode.

Press the +CV (SHIFT+MODE) key.

The mode switches to CC+CV.

Check that CC+CV is indicated on the display.

PLZ-4W Basic Operation 5-11

3. Select the current range and voltage range.

Press the RANGE key to select the current range. Press the VRANGE (SHIFT+RANGE) key to select the voltage range.

Set the current and voltage values.

Check that the display is in the basic setting entry condition (the characters “SET” is highlighted).

While viewing the display, turn the rotary knob. To switch between current and voltage settings, press the SET/VSET key.

Turn on the load.

Press the LOAD key.

The LOAD LED illuminates, and the current flows.

The display shows the measured values (voltage, current, and wattage) at the load input terminal.

Change the current or voltage setting.

Turn the rotary knob to change the setting. To switch between current and voltage settings, press the SET/VSET key.

Turn off the load.

Press the LOAD key.

The LOAD LED turns off, and the current is cut off.

5-12 Basic Operation PLZ-4W

5.7 CR Mode

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

In CR mode, you set the conductance [S], an inverse of the resistance. The resistance calculated from the conductance is also displayed.

• Conductance [S] = 1/resistance []

You can also add +CV mode to CR mode. In CR+CV mode, only the conductance is displayed.

Overview of the procedure

Select the operation mode, and set the resistance. Turn on the load and change the conductance. Finally, turn off the load to cut off the current.

Preparation Main operation Unit behavior

Check that the load is turned off. Set the operation mode.

■ Operating procedure of CR mode

Fig. 5-5 Keys used in CR mode

Check that the load is turned off.

Check that the LOAD LED is turned off. If it is on, press the LOAD key to turn it off.

Select the operation mode.

Press the MODE key.

Press the MODE key repetitively until CR is highlighted on the menu. After selecting the operation mode, check that CR is indicated on the display.

Turn on the load. Change the conductance. Turn off the load.

An operation mode pop-up menu appears.

The display shows the voltage, current, and wattage at the load input terminal.

PLZ-4W Basic Operation 5-13

3. Select the current and conductance range.

Press the RANGE key.

A current range pop-up menu appears.

Each time you press the RANGE key while the menu is displayed, the range switches in the order L, M, and H.

When the desired range is highlighted, stop pressing the key. Along with L, M, or H, the full scale value of the respective range is displayed.

This value varies depending on the model. You cannot select separately the range for current and conductance.

Select the voltage range.

Press the VRANGE (SHIFT+RANGE) key.

A voltage range pop-up menu appears.

Each time you press the VRANGE key, the voltage range switches between 15 V and 150 V.

When the desired range is highlighted, stop pressing the key.

Set the conductance [S].

Check that the display is in the basic setting entry condition (the characters “SET” is highlighted).

While viewing the display, turn the rotary knob. First, use coarse adjustment to roughly set the value, and then switch to fine

adjustment to adjust the value precisely. When you press the SET/VSET key, the resistance calculated from the conduc-

tance is indicated at the multi display.

Turn on the load.

Press the LOAD key.

The LOAD LED illuminates, and the current flows.

The display shows the measured values (voltage, current, and wattage) at the load input terminal.

Change the conductance setting.

Turn the rotary knob to change the conductance setting. The conductance cannot be set greater than the maximum value of the selected

range.

Turn off the load.

Press the LOAD key.

The LOAD LED turns off, and the current is cut off.

5-14 Basic Operation PLZ-4W

■ Operating procedure of CR+CV mode

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

Fig. 5-6 Keys used in CR+CV mode

Check the operation mode.

Check that CR is indicated on the display.

Select the operation mode.

Press the +CV (SHIFT+MODE) key.

The mode switches to CR+CV.

Check that CR+CV is indicated on the display.

Select the current range and voltage range.

Press the RANGE key to select the current range. Press the VRANGE (SHIFT+RANGE) key to select the voltage range.

Set the conductance and voltage.

Check that the display is in the basic setting entry condition (the characters “SET” is highlighted).

While viewing the display, turn the rotary knob. To switch between conductance and voltage settings, press the SET/VSET key.

Turn on the load.

Press the LOAD key.

The LOAD LED illuminates, and the current flows.

The display shows the measured values (voltage, current, and wattage) at the load input terminal.

Change the conductance setting.

Turn the rotary knob to change the conductance setting. The conductance cannot be set greater than the maximum value of the selected

range.

Turn off the load.

Press the LOAD key.

The LOAD LED turns off, and the current is cut off.

PLZ-4W Basic Operation 5-15

5.8 CV Mode

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

In CV mode, you set the Voltage [V].

Overview of the procedure

Select the operation mode, and set the voltage value. Turn on the load and change the voltage value.

Finally, turn off the load to cut off the current.

Preparation Main operation Unit behavior

Check that the load is turned off. Set the operation mode.

■ Operating procedure of CV mode

Fig. 5-7 Keys used in CV mode

Check that the load is turned off.

Check that the LOAD LED is turned off. If it is on, press the LOAD key to turn it off.

Select the operation mode.

Press the MODE key.

Press the MODE key repetitively until CV is highlighted on the menu. Check that CV is indicated on the display.

Turn on the load. Change the voltage value. Turn off the load.

An operation mode pop-up menu appears.

The display shows the voltage, current, and wattage at the load input terminal.

Select the current range.

Press the RANGE key.

A current range pop-up menu appears.

Each time you press the RANGE key while the menu is displayed, the range switches in the order L, M, and H.

When the desired range is highlighted, stop pressing the key. Along with L, M, or H, the full scale value of the respective range is displayed.

This value varies depending on the model.

5-16 Basic Operation PLZ-4W

4. Select the voltage range.

Press the VRANGE (SHIFT+RANGE) key.

A voltage range pop-up menu appears.

Each time you press the VRANGE key, the voltage range switches between 15 V and 150 V.

When the desired range is highlighted, stop pressing the key.

Set the voltage value.

Check that the display is in the basic setting entry condition (the characters “SET” is highlighted).

While viewing the display, turn the rotary knob. First, use coarse adjustment to roughly set the value, and then switch to fine

adjustment to adjust the value precisely.

Turn on the load.

Press the LOAD key.

The LOAD LED illuminates, and the current flows.

The display shows the measured values (voltage, current, and wattage) at the load input terminal.

Change the voltage setting.

Turn the rotary knob to change the voltage setting. The voltage value cannot be set greater than the maximum value of the selected

range.

Turn off the load.

Press the LOAD key.

The LOAD LED turns off, and the current is cut off.

PLZ-4W Basic Operation 5-17

5.9 CP Mode

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

In CP mode, you set the wattage (W).

Overview of the procedure

Select the operation mode, and set the wattage.

Turn on the load and change the wattage. Finally, turn off the load to cut off the current.

Preparation Main operation Unit behavior

Check that the load is turned off. Set the operation mode.

■ Operating procedure of CP mode

Fig. 5-8 Keys used in CP mode

Check that the load is turned off.

Check that the LOAD LED is turned off. If it is on, press the LOAD key to turn it off.

Select the operation mode.

Press the MODE key.

Press the MODE key repetitively until CP is highlighted on the menu. After selecting the operation mode, check that CP is indicated on the display.

Turn on the load. Change the wattage. Turn off the load.

An operation mode pop-up menu appears.

The display shows the voltage, current, and wattage at the load input terminal.

Select the current range.

Press the RANGE key.

A current range pop-up menu appears.

Each time you press the RANGE key while the menu is displayed, the range switches in the order L, M, and H.

When the desired range is highlighted, stop pressing the key. Along with L, M, or H, the full scale value of the respective range is displayed.

This value varies depending on the model.

5-18 Basic Operation PLZ-4W

4. Select the voltage range.

Press the VRANGE (SHIFT+RANGE) key.

A voltage range pop-up menu appears.

Each time you press the VRANGE key, the voltage range switches between 15 V and 150 V.

When the desired range is highlighted, stop pressing the key.

Set the wattage value.

Check that the display is in the basic setting entry condition (the characters “SET” is highlighted).

While viewing the display, turn the rotary knob. First, use coarse adjustment to roughly set the value, and then switch to fine

adjustment to adjust the value precisely.

Turn on the load.

Press the LOAD key.

The LOAD LED illuminates, and the current flows.

The display shows the measured values (voltage, current, and wattage) at the load input terminal.

Change the wattage setting.

Turn the rotary knob to change the wattage setting. The wattage value cannot be set greater than the maximum value of the

selected range.

Turn off the load.

Press the LOAD key.

The LOAD LED turns off, and the current is cut off.

PLZ-4W Basic Operation 5-19

5.10 Soft start

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

1. Setu

2. Configuration

4. Model Info

PREV NEXT

3. Calibration

The PLZ-4W can be set to start up slowly of the input current of the PLZ-4W (soft start) in the constant current (CC) mode and the constant resistance (CR) mode when the applying voltage and the turning on the load at the same time, or when the voltage applied with 0 V input of the load input while the load is turned on.

When the soft start time is appropriately set, the distortion of output voltage from the DUT can be suppressed. Set the soft-start in accordance with the rise time of the DUT.

Rise time of the DUT Rise time of the PLZ-4W

Input current

Time

Input current

When soft start time is inappropriate When soft start time is appropriate

Fig. 5-9 Difference in operation by the setting of soft start time

■ Procedure

Fig. 5-10 Keys used in soft start

Check that the load is turned off.

Check that the LOAD LED is turned off. If it is on, press the LOAD key to turn it off.

Select the menu setup.

Press the MENU (SHIFT + SET/VSET) key.

The menu appears.

Time

5-20 Basic Operation PLZ-4W

Select Setup.

Press the or CURSOR key several times until Setup is highlighted on the menu.

When highlighted, press the ENTER key.

4. Select Function.

Setu

1. Function

2. Protect Action

4. Cut Off

5. Res

onse

PREV NEXT

3. Memor

Function

Count Time :

OFF

Soft Start :

1ms

Press the or CURSOR key several times until Function is highlighted on the menu.

When highlighted, press the ENTER key.

Select soft start time.

Check that the cursor is blinking by Soft Start on the menu, and turn the rotary knob to select the soft start time.

Exit from the menu.

Press the MENU (SHIFT + SET/VSET) key.

The display returns to the basic setting entry condition (the characters “SET” is highlighted).

The soft start time is set.

PLZ-4W Basic Operation 5-21

5.11 Lock Function

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

LOCAL

SHIFT

ABC

OPP / OCP

0.00mA0.000

0.000

SLEWRATE

0.500

0.01

mA/μs

SET

H 33A 150V

Key icon

The PLZ-4W can be locked to prevent erroneous operation such as inadvertently changing the settings or overwriting the memory or sequence. The functions that can be used and those that cannot be used when the lock function is enabled are indicated below.

Table5-1 Lock function

Functions that can be used Functions that cannot be used

Sequence execution Sequence construction

ABC preset memory recall

Setup memory recall

Load on/off Setting change

Lock set/clear Memory store (save)

5-22 Basic Operation PLZ-4W

Fig. 5-11 Keys used in the lock function

■ Setting the lock

1. Set the lock.

Press the LOCK (SHIFT+LOCAL) key.

A key icon is indicated on the display, and the PLZ-4W is locked.

When locked, you can only carry out the following key operations: turn on or off the load, execute sequences, recall ABC preset memories, recall setup memories, and release the lock.

■ Releasing the lock

1. Release the lock.

Hold down LOCK (SHIFT+LOCAL) for a few seconds until a beep is heard.

The key icon clears, and the lock is released.

■ Locking the PLZ-4W at power on

By default, the PLZ-4W is not locked at power on. You can change the setting from the menu so that the PLZ-4W is locked at power on.

Check that the load is turned off.

Check that the LOAD LED is turned off. If the LED is illuminated, press the LOAD key to cut off the current.

2. Select the menu setup.

1. Setu

2. Configuration

4. Model Info

PREV NEXT

3. Calibration

1. Master/Slave

2. Power On

4. External

PREV NEXT

3. Interface

Configuration

Power On

Key Lock :

Load On :

OFF

Press the MENU (SHIFT + SET/VSET) key.

The menu appears.

Select Configuration

Press the or CURSOR key several times until Configuration is highlighted on the menu. When highlighted, press the ENTER key.

Select Power On.

Press the or CURSOR key several times until Power On is highlighted on the menu. When highlighted, press the ENTER key.

Select key lock.

Press the CURSOR key to move the blinking cursor by Key Lock on the menu.

Turn the rotary knob to the right to display ON and left to display OFF. To lock the PLZ-4W at power on, select ON.

Exit from the menu.

Press the MENU (SHIFT + SET/VSET) key.

The display returns to the basic setting entry condition (the characters “SET” is highlighted).

When you turn on the PLZ-4W the next time, it will be locked. To perform panel operation, hold down LOCK (SHIFT+LOCAL) for a few

seconds until a beep is heard to release the lock.

PLZ-4W Basic Operation 5-23

5.12 Short Function

CAUTION

Equipment under test

PLZ-4W Series Electronic Load

Relay

Relay for high current

J1 connector on the rear panel

–

<19> <20>

Driver circuit

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

0.00mA0.000

0.000

SLEWRATE

0.500

0.01

mA/μs

SET

H 33A 150V

Short icon

The short function is used to immediately set the maximum current (CC mode) or minimum resistance (CR mode).

When the short function is enabled, the short signal output of the J1 connector is turned on. The short signal output terminal is connected to a relay contact (30 VDC/ 1 A) and can be used to drive an external relay for high current to short the load input terminal.

For a description of the J1 connector, see “J1 and J2 Connectors” in section 6.8, “External Control.”

• Be sure to use a dedicated driver circuit to drive the relay for high current.

Fig. 5-12 Connection example of a relay for high current

■ Procedure

Fig. 5-13 Keys used in the short function

Execute the short function.

With the load turned on, press the SHORT (SHIFT+SLEW RATE) key.

A short icon appears. When in CC mode, the value is set to the maximum current; when in CR mode, the value is set to the minimum resistance.

• The short function setting cannot be saved to the setup memory.

Clear the short function.

Press the SHORT (SHIFT+SLEW RATE) key again.

The short icon clears, and the PLZ-4W returns to the original condition before the short function was executed.

5-24 Basic Operation PLZ-4W

5.13 Menu Setup

1. Setu

2. Configuration

4. Model Info

PREV NEXT

3. Calibration

Setu

1. Function

2. Protect Action

4. Cut Off

5. Res

onse

PREV NEXT

3. Memor

1. Master/Slave

2. Power On

4. External

PREV NEXT

3. Interface

Configuration

1. CC(Low

)

2. CC(Mid

)

4. CC 15V

5. CC 150V

3. CC(High

)

Calibration

[ PLZ164W ]

To function settings

Displays specific information about the model that you are using.

To calibration items See chapter 8, “Maintenance and Calibration.”.

VERSION

Model Information

SUB 1.00 MAIN 1.02

To environmental settings Items on this screen are confirmed by power cycling the PLZ-4W.

1. Setu

2. Configuration

4. Model Info

PREV NEXT

3. Calibration

The menu is used to change the operating conditions of the PLZ-4W and the default settings of functions.

This section describes the operations on the menu and a list of menu items. The hierarchical structure of the menu is shown below.

PLZ-4W Basic Operation 5-25

Fig. 5-14 Menu hierarchy

■ Procedure

1. Check that the load is turned off.

Check that the LOAD LED is turned off. If it is on, press the LOAD key to turn it off.

Select the menu setup.

Press the MENU (SHIFT + SET/VSET) key.

Select the menu.

Press the or CURSOR key several times until the desired menu item is highlighted on the menu. When highlighted, press the ENTER key.

• To exit from the menu, press the MENU (SHIFT + SET/VSET) key.

The menu appears.

• Operation of selecting menu items

Setu

1. Function

2. Protect Action

4. Cut Off

5. Res

onse

PREV NEXT

3. Memor

Function

Count Time :

OFF

Soft Start :

1ms

NOTE

You can also select the menu item by turning the rotary knob. Turning the rotary knob to the right moves the highlight downward; turning it to the left moves the highlight upward.

Then, select the next menu.

Press the or CURSOR key several times until the desired menu item is highlighted on the menu. When highlighted, press the ENTER key.

A setup item screen of the function is displayed.

• Next page and previous page

To return to the previous screen, press the PREV (SHIFT+ ) key. To move to the next screen (or select a menu item and move to the next screen), press the NEXT (SHIFT+ ) key.

Select the setup item.

Press the or CURSOR key several times until the cursor moves next to the desired setup item.

Select the value.

Turn the rotary knob to the right or left to select the value of the item. To move to another item, press the or CURSOR key several times to

move the cursor.

Exit from the menu.

Press the MENU (SHIFT + SET/VSET) key.

The display returns to the basic setting entry condition (the characters “SET” is highlighted).

• In Configuration setting, power cycle the PLZ-4W after finishing the menu setup. The new setting is confirmed by power cycling the PLZ-4W.

5-26 Basic Operation PLZ-4W

Table5-2 Menu items

Menu name 1 Menu name 2 Item name Values <*1>

1. Setup 1. Function Soft Start 1 ms 50 ms, 100 ms, 200 ms

Count Time (elapsed time display) OFF

2. Protect Action OCP LIMIT

OPP LIMIT, LOAD OFF

3. Memory ABC Preset Memory Recall SAFETY

4. Cut Off Time (auto load off timer) OFF

5. Response – 1/1, 1/2, 1/5, 1/10

2. Configura-

tion

1. Master/Slave Operation MASTER

Parallel (MASTER only) -

Load booster (MASTER: PLZ1004W only) -, 1, 2, 3, 4

2. Power On

3. Interface Control GPIB, RS232C, USB

GPIB Address 1

RS232C Baudrate 2 400, 4 800, 9 600, 19200 bps

Load On

Key Lock

, 2, 3, 4, 5

OFF

OFF, ON

to 30

, 2 ms, 5 ms, 10 ms, 20 ms,

, ON

, LOAD OFF

, DIRECT

, 000:00:01 to 999:59:59

, SLAVE

, ON

Data 8 (fixed)

Stop 1, 2

Parity NONE

Ack (acknowledge) OFF

USB VID 0x0B3E (display only)

PID xxxx (display only)

S/N xxxx (display only)

4. External Control OFF

LoadOn IN LOW, HIGH

3. Calibration 1. CC (Low)

2. CC (Mid)

3. CC (High)

4. CV 15V

5. CV 150V

4. Model info MODEL (Model) PLZxxxW

VERSION SUB (Firmware version) x.xx

To the calibration screen (see chapter 8, “Maintenance and Calibration.”)

, ON

, V, R, Rinv (Inverse)

VERSION MAIN (ROM version) x.xx

*1:Underlined values are factory default values.

PLZ-4W Basic Operation 5-27

5.14 Initialization

CAUTION

The backup function of the PLZ-4W retains the current settings, menu settings, and memory contents (ABC preset memories and setup memory) even when the POWER switch is turned off. You can initialize the PLZ-4W settings to factory default by carrying out the following operation.

• For a description of the ABC preset memories, see section 6.1, “ABC preset memories.” For a description of the setup memory, see section 6.2, “Setup Memory.”

• For a description of the default menu settings, see Table 5-3.

• Use caution because the contents of ABC preset memories and the setup

memory are also cleared when the PLZ-4W is initialized.

■ Initializing the PLZ-4W

1. While holding down the ENTER key, turn on the POWER switch.

SET CLR appears when the display turns on.

Release the ENTER key when the next information appears. The PLZ-4W settings are initialized.

Table 5-3 Factory default settings

Item Panel settings

OCP value Maximum value Minimum value

OPP value Maximum value Minimum value

UVP value OFF OFF

Current 0 A Full scale of H range

Conductance 0 S Full scale of H range

Voltage Minimum value Full scale of H range

Wattage 0 W Full scale of H range

Current range H H

Voltage range 150 V 150 V

Load on/off Load off Load off

Operation mode CC CC

Slew rate Minimum value of H range Maximum value of H range

Setup memory settings

(all 100 sets)

ABC preset memories Settings above in each mode Settings above in each mode

Menu setup See Table 5-2. See Table 5-2.

5-28 Basic Operation PLZ-4W

5.15 Response Speed

The PLZ-4W operates by detecting the input current or voltage and feeding back those values. You can set the response speed of the negative feedback control. The response speed can be specified in CC mode (CC+CV mode) and CR mode (CR+CV mode). You can decrease the response speed to assure stable operation.

If the load wire is long or has a large loop, the wire inductance is increased. Consequently, the current variation at the time of switching operation will cause a large voltage drop.

In such condition, the input voltage may fall below the minimum operating voltage of the PLZ-4W causing the current waveform to be distorted. In some cases, the input voltage may exceed the maximum input voltage and cause damage to the PLZ4W. You must be careful especially when the slew rate setting is high or switching is performed using large currents through parallel operation.

In such case, it is important that you use the shortest twisted wire possible for the connection. Then, decrease the slew rate setting or lower the response speed so that the voltage induced by the inductance is within the minimum operating voltage and the maximum input voltage range of the PLZ-4W.

In the case of DC operation also, the phase lag of the current may cause instability in the PLZ-4W control inducing oscillation. In this case also, use the shortest twisted wire possible for the connection, and achieve stable operation by lowering the response speed.

■ Response speed type and performance

The following four levels are available. Select one of the levels.

1/1: Normal response speed 1/2: 1/2 the normal response speed (Slows down by a factor of 2.) 1/5: 1/5 the normal response speed (Slows down by a factor of 5.)

1/10:1/10 the normal response speed (Slows down by a factor of 10.) The default setting is 1/1. Settings other than 1/1 slow down the speed and affect the performance of soft start

and slew rate as well as the rise and fall times of load on/off. The slew rate in turn affects the switching operation.

■ Setting the response speed

You can set the response speed of the PLZ-4W using “1. Setup” | “2. Response” from the menu.

For a description of changing the menu setup, see section 5.13, “Menu Setup.” When using parallel operation or high speed load simulations (such as switching

function), refer to the “Technical Note for the electronic load (PLZ-4W), When operating under parallel operation or high-speed load simulations” as provided as separate sheet and set the response speed properly.

PLZ-4W Basic Operation 5-29

5-30 Basic Operation PLZ-4W

Chapter 6 Applied Operation

This chapter describes functions such as ABC preset memories, switching function, and sequence function that are used in actual applications.

PLZ-4W Applied Operation 6-1

6.1 ABC preset memories

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

Three separate sets of settings for each range of each operation mode can be saved to memories A, B, and C. Settings are saved or recalled after determining the operation mode and range. Settings (A, B, and C) saved in the current operation mode at the current range can be recalled.

Table6-1 Memory Overview

Operation mode Range A B C

CC CR CP

CV Voltage

Current

CC+CV

H Current



CR+CV Voltage

L CurrentHM

current, resistance, and wattage voltage

In CC+CV and CR+CV modes, the settings are saved to the memories of CC, CR, and CV modes.

In CC, CR, and CP modes, the settings according to the current range are saved to the memories A, B, and C. In CV mode, the settings according to the voltage range are saved. In CC+CV and CR+CV modes, the voltage and current values are saved.

ABC preset memories can be recalled even when the load is turned on.

Fig.6-1 Keys for ABC preset memories

6-2 Applied Operation PLZ-4W

6.1.1 Saving to ABC preset memories

Three separate sets of settings for each range of each operation mode can be saved to memories A, B, and C. The settings can be saved even when the load is turned on.

Select the ABC preset memories.

First, switch to the desired operation mode and set the range and value.

Next, press the ABC (SHIFT+ENTER) key.

Three keys A, B, and C illuminate.

Save to the memory.

Press the A, B, or C memory key.

The pressed key illuminates.

[The settings are saved to the selected memory. The key that is illuminated turns off when the setting is changed.

6.1.2 Recalling ABC preset memories

There are two methods for recalling memories: SAFETY and DIRECT. By default, the SAFETY method is selected.

SAFETY

In this method, you check the memory contents on the display before actually recalling the settings.

DIRECT

In this method, the settings saved to memory A, B, or C are recalled directly. The recalled settings are immediately applied as current settings.

■ Changing to the DIRECT method

By default, the SAFETY method (in which the memory contents are checked on the display before actually applying them) is selected. If set to the DIRECT method, the settings of the recalled memory are applied immediately. The recall method is switched from the menu.

Check that the load is turned off.

Check that the LOAD LED is turned off. If it is on, press the LOAD key to turn

it off.

Select the menu setup.

Press the MENU (SHIFT+SET/VSET) key.

The menu appears.

PLZ-4W Applied Operation 6-3

3. Select Setup.

Press the or CURSOR key several times until Setup is highlighted on the menu. When highlighted, press the ENTER key.

Select Memory.

Press the or CURSOR key several times until Memory is highlighted on the menu. When highlighted, press the ENTER key.

Select the recall method of ABC preset memories.

Turn the rotary knob to the right to display SAFETY and left to display DIRECT. To switch to the direct method, select DIRECT.

Exit from the menu.

Press the MENU (SHIFT+SET/VSET) key.

The recall method of ABC preset memories are set.

■ Recalling ABC preset memories (SAFETY)

1. Select the memory.

Set the operation mode and range according to the memory to be recalled. Next, press the key (A, B, or C) to be recalled.

The pressed key illuminates, and the settings stored to the memory are shown on the display.

Recall the memory.

To recall the memory, press the ENTER key. To change to another memory, press the desired key (A, B, or C), check the set-

tings, and press the ENTER key.

The settings are applied when you press the ENTER key.

■ Recalling ABC preset memories (DIRECT)

1. Recall the memory.

Set the operation mode and range according to the memory to be recalled.

Press the key (A, B, or C) to be recalled.

The pressed key illuminates, and the current settings are changed to the settings that were stored.

6-4 Applied Operation PLZ-4W

0.00mA0.000V

0.000W

SLEWRATE

8.000

0.01

mA/s

SET

H 33A 150V

8.000 A

12.00 V

8.000 A

0.00mA0.000V

0.000W

CC+CV

SLEWRATE

8.000

0.01

mA/s

SET

H 33A 150V

8.000 A

( )

[Save to ABC preset memory]

[Recall ABC preset memory]

ABC

Press ENTER. (SAFETY only)

ENTER

s )N###2#6OR#0MODESAVESONESETTING

3ETTINGS SWITCHUSING3%463%4

3ETTING

( )

ABC

ENTER

/PERATIONMODE

2ANGESETTING

/PERATIONMODE

2ANGESETTING

2ECALLSTHESETTINGCURRENTRESISTANCE VOLTAGEORPOWERTHATHADBEENSAVED TOPRESETMEMORY!"OR#ATTHECURRE OPERATIONMODEANDRANGESETTING

3AVESONESETTINGCURRENTRESISTANCE VOLTAGEORPOWERATTHECURRENT OPERATIONMODEANDRANGESETTINGTO PRESETMEMORY!"OR#

&OREXAMPLEIFYOUPRESS!THESETTINGOF !ATTHECURRENTRANGEOF!AND VOLTAGERANGEOF6ISSAVEDTO

memory A.

0RESSTHEKEYOFTHE MEMORYTOBE RECALLED

0RESSTHEKEYOFTHE SAVEDESTINATION

memory.

Press ABC.

3()&4%.4%2

s )N###6OR#2#6MODESAVESTWOSETTINGS

2ECALLSTHETWOSETTINGSCURRENTOR RESISTANCEANDVOLTAGETHATHADBEEN SAVEDTO

preset

MEMORY!"OR#AT THECURRENTOPERATIONMODEANDRANGE SETTING

&OREXAMPLEIFYOUPRESS!THESETTINGSOF !AND6ATTHECURRENTRANGEOF! ANDVOLTAGERANGEOF6ARESAVEDTO

memory A.

3AVESTWOSETTINGSCURRENTORRESISTANCEAND VOLTAGEATTHECURRENTOPERATIONMODEAND RANGESETTINGTO

preset

MEMORY!"OR#

[Save to ABC preset memory]

[Recall ABC preset memory]

0RESSTHEKEYOFTHE SAVEDESTINATION

memory.

Press ABC.

3()&4%.4%2

Press ENTER. (SAFETY only)

0RESSTHEKEYOFTHE MEMORYTOBE RECALLED

PLZ-4W Applied Operation 6-5

Fig. 6-2 Contents stored to the ABC preset memories

6.2 Setup Memory

The setup memory can store up to 100 sets (0 to 99) of the current conditions of the items shown below. You can attach a memo using up to 15 characters to each memory set. The stored settings can be recalled as necessary.

■ Settings that are saved

• Operation mode (CC, CR, CV, or CP, and enabled/disabled condition of +CV)

• Basic settings (current, resistance, voltage, and power)

• Range setting (RANGE/VRANGE)

• Slew rate value (SLEW RATE)

• Switching frequency and duty cycle (FREQ/DUTY)

• Switching time (Th/TL)

• Switching level and ratio (LEVEL/%)

• Protection setting (OCP/OPP/UVP)

• Contents of ABC preset memories (A/B/C)

Table 6-2 Contents saved to a single memory set

Operation mode Range A B C Other settings

H CC CR

CV Voltage

CC+CV CR+CV Voltage

Current

H CurrentHM

L CurrentHM

current, resistance, wattage voltage other values (slew rate, switching, and pro-

tection)

6-6 Applied Operation PLZ-4W

Fig. 6-3 Keys for the setup memory

SWITCHING

165W

ELECTRONIC LOAD

1.5-150V 0-33A

PL Z164W

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

LOCAL

CURSOR

COARSE/FINE

SHIFT

ABC

OPP / OCP

DEL

INS

0.00mA0.000

0.000

SET

H 33A 150V

. 1

STORE

ENTER

. 1:

Program

SLEWRATE

1.012

A /μs

Memo entry area

NOTE

6.2.1 Saving to the Setup Memory

1. Select the setup memory.

First, set the operation mode, range, and settings as desired. Next, press the STORE (SHIFT+RECALL) key.

The STORE key blinks.

The setup memory store screen appears. The store screen shows the last number of the memory to which settings were saved previously (0 by default).

Select the memory number.

Turn the rotary knob to show the number of the memory to which settings are to be saved.

Enter a memo.

Press the CURSOR key. The cursor blinks below the number. Turn the rotary knob in this condition to select a character.

After selecting a character, press the key to move the cursor to the right, and continue entering characters. To move to the left, press the key. You can register up to 15 characters.

• You can return to the memory number selection by pressing the CURSOR key

PLZ-4W Applied Operation 6-7

when entering characters.

• If you press the PREV (SHIFT+ ) key or STORE (SHIFT+RECALL) key, the settings are not saved to the setup memory, and the display returns to the basic setting entry condition (the characters “SET” is highlighted).

4. Save the settings to the setup memory.

0.00mA0.000

0.000

SET

H 33A 150V

. 1

RECALL

ENTER

SLEWRATE

1.012

A /μs

NOTE

Press the ENTER key.

The STORE key illuminates.

The settings described above are saved to the memory. If settings are already stored at the selected memory number, the settings are overwritten.

The STORE key remains illuminated while the saved settings are used.

6.2.2 Recalling the Setup Memory

1. Check that the load is turned off.

Select the setup memory.

Press the RECALL key.

The RECALL key blinks.

The setup memory recall screen appears. The recall screen shows the number of the memory to which settings were saved previously (0 by default).

Select the number of the memory to be recalled.

Turn the rotary knob to show the number of the memory to be recalled.

• When a memo is attached, it is displayed under the memory number.

• If you press the PREV (SHIFT+ ) key or RECALL key, the settings are not recalled from the setup memory, and the display returns to the basic setting entry condition (the characters “SET” is highlighted).

Recall the setup memory.

Press the ENTER key.

The RECALL key illuminates.

The settings in the memory are recalled.

The RECALL key remains illuminated while the recalled settings are used. If you change the settings, the RECALL key turns off.

• The setup memory cannot be recalled when the load is turned on.

• The setup memory can store most of the settings including the operation mode and range setting. Note that if the stored settings differ from the current operation mode or range setting, they will be switched.

6-8 Applied Operation PLZ-4W

0.00mA0.000V

0.000W

SLEWRATE

8.000

0.01

mA/μs

SET

H 33A 150V

0.00mA0.000V

0.000W

CC+CV

SLEWRATE

8.000

0.01

mA/μs

SET

H 33A 150V

Press RECALL.

ENTER

s )N###2#6OR#0MODE

3ETTINGS SWITCHUSING3%463%4

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2ANGESETTING

/PERATIONMODE

2ANGESETTING

RECALL

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. 1

STORE

ENTER

. 1

RECALL

ENTER

RECALL

STORE

. 1

STORE

ENTER

. 1

RECALL

ENTER

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;3AVETOTHESETUPMEMORY=

;2ECALLTHESETUPMEMORY=

Press STORE.

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press ENTER.

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press ENTER.

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preset

PLZ-4W Applied Operation 6-9

Fig. 6-4 Contents stored to the setup memory

6.3 Switching Function

Th TL

FREQ

0[A

] (

0 %

)

LEVEL[A

]

(%)

SET

[A]

(

100 %

)

Edge where the pulse is output from the TRIG OUT connector

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

Switching refers to the operation of executing two load current settings repetitively. The switching function operates in CC and CR modes. The switching function is suited to transient response characteristics test of regulated DC power supplies.

You can perform various tests by setting the switching frequency, ON/OFF ratio of the switch (duty cycle), switching level, and switching time. You can also set the slew rate of the current change. (See section 6.4, “Setting the Slew Rate.”)

When the switching operation is in progress, a trigger signal is output from the TRIG OUT connector on the front panel. A pulse is output at the edges indicated by the circles in Fig. 6-5.

Fig. 6-5 Characteristics diagram of a switching waveform

Fig. 6-6 Keys used in the switching function

■ Operating Procedure

1. Select the switching level.

Press the LEVEL key.

The LEVEL key illuminates.

The maximum value that can be specified is the value specified in the current operation mode, and the minimum value is 0 A or 0 mS. If you press the % (SHIFT+LEVEL) key, you can enter the level in terms of a percentage of the current setting (0.0 % to 100.0 %).

To reenter the level using a value, press the LEVEL key again.

Set the switching level.

While viewing the display, turn the rotary knob to set the value. You can press the rotary knob to switch between coarse adjustment and fine

adjustment.

6-10 Applied Operation PLZ-4W

3. Turn on the switching mode.

NOTE

Press the SW ON key.

The SW ON key illuminates, and the switching mode is enabled.

• Setting the switching function using frequency and duty cycle

Select switching frequency and duty cycle.

Press the FREQ/DUTY key.

The FREQ/DUTY key illuminates.

Switching frequency (FREQ) or duty cycle (DUTY) is highlighted alternately each time you press FREQ/DUTY.

Highlight the one you wish to set.

Set the switching frequency and duty cycle.

While viewing the display, turn the rotary knob to set the value. You can press the rotary knob to switch between coarse adjustment and fine

adjustment.

• You can set the switching frequency in the range of 1 Hz to 20 kHz, but if the frequency is set high, limitation is placed on the upper limit of the duty cycle. The resolution (Hz and kHz) switches automatically.

• Setting the switching function using time

Select the switching time.

Press the Th/TL (SHIFT+FREQ/DUTY) key.

The Th/TL key illuminates.

The high side (Th) and the low side (TL) of the switching time is highlighted alternately each time you press Th/TL (SHIFT+FREQ/DUTY).

Highlight the one you wish to set.

Set the switching time.

While viewing the display, turn the rotary knob to set the switching time on the high side and low side.

• The settings for the switching operation can be changed even when the load is turned on.

■ Operation when the response speed is changed

You can change the response speed in CC mode (CC+CV mode) and CR mode (CR+CV mode).

In some cases, the wire inductance increases and a large voltage drop occurs due to changes in the current or the phase lag of the current may cause instability in the PLZ-4W control inducing oscillation.

In such case, you can decrease the response speed to assure stable operation.

• For details, see section 5.15, “Response Speed.”

PLZ-4W Applied Operation 6-11

6.4 Setting the Slew Rate

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAUSE

STORE

RECALL

ABC

LOAD

Th/TL

FREQ / DUTY

PRESET

SEQ

LEVEL

VRANGE

RANGE

SW ON

MODE

LOAD

SET / VSET

LOCK

SHIFT

ABC

OPP / OCP

The slew rate defines the slope for changing the current when the current is changed rapidly such as by using the switching function in CC and CR modes. On the PLZ4W, you set the amount of change in the current per unit time according to the current range.

The slew rate is activated when the setting value is changed such as by switching during turning the load to on.

In CR mode, the values that can be specified (maximum slew rate at each range) are 1/10th the values of CC mode. For the detailed values, see section 9.1, “Electrical Specifications.”

Fig. 6-7 Keys for the slew rate

■ Procedure

1. Selects the slew rate.

Press the SLEW RATE key.

The SLEW RATE key illuminates.

Sets the slew rate value.

While viewing the display, turn the rotary knob to set the slew rate value. You can press the rotary knob to switch between coarse adjustment and fine

adjustment.

6-12 Applied Operation PLZ-4W

6.5 Using the Elapsed Time Display and the

Time

Voltage

UVP detection voltage

V1:

V2:

Voltage after the specified time elapses

Tcutoff

Tcount

Tcutoff:

Tcount:

Elapsed time display (Count Time)

Auto load off timer (Cut Off Time)

0.00mA0.000

0.000

SET

H 33A 15V

ALARM

ENTER

SLEWRATE

2.500

A /μs

UVP

0:20:03

0.00mA0.000

0.000

SET

H 33A 15V

TIME UP

ENTER

VOLTAGE

1.644 V

SLEWRATE

2.500

A /μs

Auto Load Off Timer

Two convenient functions are available for the discharge tests of batteries.

• Measure the time from discharge start until the cutoff voltage is reached (time

measurement).

• Measure the closed circuit voltage after a specified time elapses from discharge

start (voltage measurement).

Fig. 6-8 Count Time and Cut Off Time

■ Elapsed time display (Count Time)

In time measurement, the PLZ-4W can measure the time from load on to load off. As a load off condition, the cutoff voltage is set to the voltage specified for the UVP

function. When the load turns off, a pop-up window appears indicating the time from load on to load off.

By default, the elapsed time after the load is turned on is not displayed. To turn on this function, select “1. Setup” | “1. Function” from the menu and set the Count Time setting to on.

• For a description of changing the menu setup, see section 5.13, “Menu Setup.”

• For a description of the UVP function, see section 5.3, “Types of Protection

Functions.” and section 5.4, “Setting the Protection Function.”

■ Auto load off timer (Cut Off Time)

In voltage measurement, the voltage immediately before the load turns off is measured. As a load off condition, a timer is set to turn off the load after a specified time elapses. When the load turns off, a pop-up window appears indicating the input voltage immediately before the load was turned off.

By default, the load on timer is off. To turn on the timer, select “1. Setup” | “4. Cut Off” from the menu and set the time in Time.

The setting range is 000 hour 00 minute 01 second to 999 hours 59 minutes 59 seconds (000:00:01 to 999:59:59).

• For a description of changing the menu setup, see section 5.13, “Menu Setup.”

PLZ-4W Applied Operation 6-13

6.6 Sequence Function

Time

100 s Ramp (RAMP ON) 7A

150 s Step (RAMP OFF) 7A

80 s Ramp (RAMP ON)

0.5A

Step 1 Step 3Step 2

Input current

10A

Execution (RUN)

Input current

STEP

910

(Execution interval)

Trigger output

TIME BASE

Sequence is a function that automatically executes instructions specified in advance one operation at a time. By specifying a sequence of operations (steps), various waveform simulations can be executed. The sequence that you create is saved by the backup function even when the power is turned off.

■ Normal sequence and fast sequence

There are two execution modes in the sequence function of the PLZ-4W: normal speed and fast speed.

• Normal sequence

A normal sequence can be set and executed from the PLZ-4W operation panel. In addition, the communication function can be used to set and execute the sequence from an external controller. The execution time can be assigned to each step. You can pause a sequence using PAUSE and resume a sequence using an external trigger input.

• Fast sequence

A fast sequence can be set and executed from the PLZ-4W operation panel. In addition, the communication function can be used to set and execute the sequence from an external controller. Each step is executed at high speeds. The high time resolution allows high-speed simulations. Each step is spaced evenly, and up to 1024 steps can be executed.

Fig. 6-9 Normal sequence execution example

Fig. 6-10 Fast sequence execution example

6-14 Applied Operation PLZ-4W

Kikusui PLZ164W, PLZ334W, PLZ1004W, PLZ164WA, PLZ664WA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Chapter 1 General Information

1.1 About This Manual

1.2 Product Overview

1.3 PLZ-4W Series Lineup

1.4 Features

1.5 Overview of Controls

1.6 Options

2.1 Checking the Package Contents

2.2 Precautions Concerning Installation Location

2.3 Precautions When Moving the Unit

2.4 Connecting the Power Cord

2.5 Grounding (Earth)

2.6 Turning on The Power

2.7 Checking the ROM Version

2.8 Load Wiring

2.8.1 Precautions Concerning Wiring

2.8.3 Connection to the Load Input Terminal on the Front Panel

Chapter 3 For First Time Users

3.1 What Is an Electronic Load

3.2 Basic Flow of Operation

3.3 Operating area of the PLZ-4W

3.4 Basic Operation Modes

3.4.1 Operation of the CC Mode

3.4.2 Let's Use CC Mode

4.1 Front Panel

4.2 Rear Panel

4.3 Operation Panel

4.4 Display

Chapter 5 Basic Operation

5.1 Panel Control Basics

5.2 Turning On or Off the Load

5.3 Types of Protection Functions

5.4 Setting the Protection Function

5.5 Operation Modes

5.6 CC Mode

5.7 CR Mode

5.8 CV Mode

5.9 CP Mode

5.10 Soft start

5.11 Lock Function

5.12 Short Function

5.13 Menu Setup

5.14 Initialization

5.15 Response Speed

Chapter 6 Applied Operation

6.1 ABC preset memories

6.1.1 Saving to ABC preset memories

6.1.2 Recalling ABC preset memories

6.2 Setup Memory

6.2.1 Saving to the Setup Memory

6.2.2 Recalling the Setup Memory

6.3 Switching Function

6.4 Setting the Slew Rate

6.6 Sequence Function