Kikusui PLZ164WL, PLZ334WL User Manual

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PART NO. IB021036

Oct. 2015

Installation and

Preparation

User’s Manual

PLZ-4WL Series Electronic Load

PLZ164WL PLZ334WL

Basic Functions

Advanced Operations

Sequences

External Control

Maintenance

Specifications

App

This manual is intended for users of the product or persons

About PLZ-4WL Series Manual

teaching other users on how to operate the product.

The manual assumes that the reader has knowledge about Power Supply.

• User’s manual (this manual) User's manual is intended for first-time users of the PLZ4WL series. It gives an overview of the PLZ-4WL series and describes various settings, measurement procedures, maintenance, safety precautions, etc. This manual is designed to be read from beginning to end. You can review this manual when you are confused about an operation or when a problem occurs.

• The communication interface manual The communication interface manual describes the content of the commands. The interface manual is written for readers with sufficient basic knowledge of how to control instruments using a personal computer.

• Quick Reference The quick reference briefly explains the panel description and the basic operation of the PLZ-4WL.

• Setup Guide The setup guide is intended for first-time users of the PLZ4WL series. It gives an overview of the PLZ-4WL series, connecting procedures, safety precautions, etc. Please read through and understand this guide before operating the product.

Trademark acknowledgements

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.

PDF and HTML files are included in the accompanying CDROM. 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.

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.

Product ROM versions that this manual

covers

This manual applies to products with firmware versions 1.0X.

When contacting us about the product, please provide us with:

The model (marked in the top section of the front panel) The ROM version (see page 16) The serial number (marked in the rear panel)

2 PLZ-4WL

• The PLZ164WL Electronic Load is also referred to as the

Notations used in this manual

WARNING

CAUTION

DESCRIPTION

See

Memo

Product Overview

PLZ164WL, the PLZ334WL Electronic Load is also referred to as the PLZ334WL

• The word computer used in the text is a collective term for personal computers and workstations.

• The following markings are used in this manual.

Indicates a potentially hazardous situation which, if ignored, could result in death or serious injury.

The PLZ-4WL Series Electronic Load is a multifunctional system designed to offer the highest levels of reliability and safety. The electronic load contains a stable and highperformance 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 electronic load comes standard with GPIB, RS232C, and USB communication functions, it can be easily incorporated into a wide range of test and inspection systems.

PLZ-4WL Series Models

Indicates a potentially hazardous situation which, if ignored, may result in damage to the product or other property.

Indicates information that you should know.

Explanation of terminology or operation principle.

Indicates reference to detailed information.

Indicates menu settings that you select. The menu item to the left of the > symbol is a higher level menu.

SHIFT+key name

Indicates an operation that requires you to press a key indicated in blue letters while holding down SHIFT.

Indicates useful information.

Model Maximum

Operating Current

PLZ164WL 50 A 0.3 V to 30 V 165 W

PLZ334WL 100 A 0.3 V to 30 V 330 W

Operating Voltage

Power

Features

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

High-speed slew rate of 50 A/µs (PLZ334WL)

The rise and fall slew rate of the current when the PLZ-4WL switches at 2 % to 100 % (20 % to 100 % in M range) of the rated current in constant current mode is 50 A/µs (PLZ334WL), which corresponds to fast rise and fall times of 1.6 µs (for all types). This allows you to conduct accurate transient-response tests of DC power supplies and to accurately generate simulated waveforms for use as dummy loads.

Variable slew rate

In constant current mode, the PLZ-4WL allows configuration using slew rates (A/ µs). This allows you to optimize the voltage drop caused by the wire inductance that occurs when a load is switched or to optimize the transient control of the equipment under test (such as a constant-voltage power supply).

Higher precision

Higher precision is offered for current settings. High resolution for minute current settings is provided using

a 3-range configuration. (0.02 mA resolution is possible in the L range of the PLZ164WL.)

Operability

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

Sequence function

User-defined sequence patterns can be saved to the internal memory. Up to 10 normal sequence programs and 1 fast sequence program can be saved. Normal sequences can contain up to 256 steps, and the fast sequence can contain up to 1024 steps. You can edit sequences easily from the large LCD.

PLZ-4WL 3

Functions that are useful for battery discharge

What Is an Electronic Load?

PLZ-4WL Series

Constant-voltage power supply

The current is constant even when the voltage varies.

Current I

Voltage

CC setting

0.1 V

3.3 V

30 V

0.1 A

Input current

Input voltage

Operating area where specifications are guaranteed

Actual operating area

165 W

0.3 V

5.5 A

50 A

Logarithmic scale

Operating area where specifications are guaranteed

50 mV 20 mV

Input current

Input voltage

0.3 V

50 A

Actual operating area

Example for the PLZ164WL

testing

You can measure the time from when the load is turned on until when it is turned off. You can measure the time from the start of battery discharge to the cutoff voltage (time measurement) by using this function in conjunction with undervoltage protection (UVP). In voltage measurement, the voltage immediately before the load turns off is measured. If you use the timer so that the load turns off after a specified amount of time, you can measure the closed-circuit voltage after a specified time has elapsed since the start of battery discharge (voltage measurement).

Standard-equipped GPIB, RS232C, and USB interfaces

The PLZ-4WL comes standard-equipped with GPIB, RS232C, and USB interfaces. It can be easily incorporated into a wide range of test and inspection systems. When the interfaces are used with the sequence function, a variety of systems can be created.

To measure the characteristics of power sources and other devices that produce energy, a load is required to consume the energy. A variable resistor can be used as a simple load. A device in which semiconductor devices such as transistors are used instead of a variable resistor is referred to as an “electronic load.” Using semiconductor components, an “electronic load” can change the current and voltage freely, so when it is used with a control circuit, it can function as a variety of different types of loads. Electronic loads can be used as loads for different types of circuits, for switching power supplies and other types of DC power supplies, for testing the characteristics and lifespans of primary and secondary batteries, and for aging. You can use the sequence function to create programs that simulate real load conditions and use these programs to produce varying loads in tests on devices such as power supplies for printers.

Operating Areas of the PLZ-4WL

As shown in the figure, the PLZ-4WL can be used within the area enclosed by the constant voltage line defined by the rated voltage, the constant power line defined by the rated power, the constant current line defined by the rated current, and the constant voltage line defined by the minimum operating voltage (the enclosed area is where specifications are guaranteed).

The specifications are not guaranteed for input voltages below

0.3 V (the values in the actual operating area). The minimum operating voltage at which current begins to flow through the PLZ-4WL is approximately 50 mV. If the input voltage is gradually increased from 0 V, no current will flow until this minimum operating voltage is exceeded. If the input voltage exceeds the minimum operating voltage and a current greater than or equal to 0.2 % of the range rating (greater than or equal to 0.2 % of the H range when the PLZ-4WL is set using the M range) starts flowing, the current can keep flowing even when the voltage is reduced down to as low as approximately 20 mV.

There are AC electronic loads and DC electronic loads. The PLZ-4WL is a DC electronic load for use with DC circuits.

Basic Operation Modes

The following six operation modes are available on the PLZ4WL.

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)

Here, we will explain the simplest of the six modes: constant current (CC) mode.

■ Constant Current Mode Operation

In constant current (CC) mode, the PLZ-4WL operates as a constant-current load.

The PLZ-4WL sinks the specified current (I) regardless of the output voltage (V1) of the constant-voltage power supply.

4 PLZ-4WL

About PLZ-4WL Series Manual 2

Notations used in this manual 3

Product Overview 3

What Is an Electronic Load? 4

Installation and

Preparation

Checking the Package Contents 12

Connecting the Power Cord 14 Turning the Power On 15

Load wiring 17 Methods for Ensuring Stable Operation 18

Connecting to the Load Input Terminals 21 Remote Sensing 24

Basic Functions

Panel Operation Basics 26 Turning the Load On and Off 27

Operation Modes 29 Constant Current Mode (CC mode) 30

Constant Resistance Mode (CR) 32

Constant Voltage Mode (CV mode) 34

Constant Power Mode (CP mode) 35

Switching 36

Slew Rate 38

Attachment to the rack adapter 13

Turning the POWER switch on 15 When the PLZ-4WL does not start

properly 16 Checking the version 16 Turning the POWER switch Off 16

Reducing the load wiring inductance 18 Optimizing the response speed 19 Do not apply excessive voltages to the

load input terminals 20 Match the polarities of the load input

terminals and the DUT terminals 20

Turning the load on 27 Turning the load off 28

Configuring CC mode 30 Configuring CC+CV mode 31

Configuring CR mode 32 Configuring CR+CV mode 33

Configuring CV mode 34

Configuring CP mode 35

Setting the switching level 36 Setting the switching interval 37 Turning the switching function on and off

Setting procedure 38

Soft Start 39 Short 40

Turning the short function on and off 40 Locking the Keys 41 Switching from Remote Mode to Local Mode

Advanced Operations

Memory Types 44 ABC Preset Memory 45

Saving settings to ABC preset memory 45

Recalling ABC preset memory entries 46 Setup Memory 47

Saving settings to setup memory 47

Recalling setup memory entries 48 Protection Functions 49

Protection function types 49

Clearing alarms 51 Response Speed 52 Elapsed Time Display and Auto Load-Off

Timer 53

Elapsed time display (Count Time) 53

Auto load-off timer (Cut Off Time) 53 Menu 54 Factory Default Settings (Initialization) 56

Sequences

Sequence Function 58

Normal sequences and fast sequences

Common Sequence Editing Operations 59 How Normal Sequences Work 60 Editing Steps in a Normal Sequence 62

Adding steps 62

Editing steps 62

Deleting steps 63 Sequence Example (Normal Sequence) 64

Editing program 1 65

Setting the steps of program 1 66

Editing program 2 68

Setting the steps of program 2 69 How Fast Sequences Work 70

Editing steps 72 Sequence Example (Fast Sequence) 74

Editing program 11 75

Setting the steps of program 11 76 Executing, Pausing, and Stopping Sequences

Executing sequences 77

Pausing a sequence 77

Stopping a sequence 78

When sequences cannot be executed 78

PLZ-4WL 5

External Control

External Control 80

About the J1 connector 81 J1 connector pin arrangement 82 Precautions for high-speed load

simulations 83

Superimposing Constant Current Mode (CC Mode) 88

Turning the Load On and Off through External Control 89

Signal Input for turning the load on and off

Load-on status signal output 90

Using a Trigger Signal to Control the PLZ-4WL

Controlling the Current Range Externally 92

Input for switching the range externally 92 Range status output 92

Alarm Signal 93

Alarm input 93 Alarm release input 93 Alarm status output 93

Monitor Signal Output 94

Trigger signal output 94 Current monitor output 94

Other functions 113 Common specifications 114 General specifications 115 Dimensions 116

Appendix

A Operating Area 118

Basic operation modes 118 How constant current (CC) mode works

119

How constant resistance (CR) mode works 120

How constant power (CP) mode works

122

How constant voltage (CV) mode works

124

How constant current and constant voltage (CC+CV) mode works 126

How constant resistance and constant voltage (CR+CV) mode works 128

Operating areas of each model 130

B Sequence Program Creation

Table132

C Options 134

Maintenance

Inspection 96

Internal inspection 97 Backup battery replacement 97

Calibration 98

What gets calibrated? 98 Preparation 99

CC Mode Calibration (Calibration numbers 1, 2, and 3) 100

CV Mode Calibration (Calibration numbers 4 and 5) 102

Ending Calibration 104 Troubleshooting 105

Specifications

Ratings 108 Constant current (CC) mode 108 Constant resistance (CR) mode 109 Constant voltage (CV) mode 109 Constant (CP) power mode 110 Measurements 110 Switching mode 111 Slew rate 111 Soft start 11 2 Response 11 2 Remote sensing 112 Protection function 112 Sequence function 113

INDEX135

6 PLZ-4WL

Search by Topic

To solve problems

See "Troubleshooting" on page 105.

• What accessories are included in the package?



"Checking the Package Contents" p. 12

• The installation space is limited, so I want to check the installation conditions.



See the included “Setup Guide”　 document, or the electronic version of　

the document on the CD-R.

---

• How do I connect the AC power supply?

 "Connecting the Power Cord" p. 14

• What kind of load wiring should I use?

 "Load wiring" p. 17

• How do I set the communication conditions for remote control?

 See the “Communication Interface

Manual” on the CD-R.

---

• How do I rack mount the PLZ-4WL? What kind of parts are needed?

"Attachment to the rack adapter" p. 13

• I want to use the PLZ-4WL in CC mode.

 "Constant Current Mode (CC mode)" p. 30

• I want to use the PLZ-4WL in CR mode.

 "Constant Resistance Mode (CR)" p. 32

• I want to add CV mode to CC mode.

 "Configuring CC+CV mode" p. 31

• How do I set the protection functions to prevent damage to the DUT?

 "Protection Functions" p. 49

• How do I use remote sensing to stabilize the PLZ-4WL?

 "Remote Sensing" p. 24

• How do I check the menu contents?

 "Menu" p. 54

• How do I reset the PLZ-4WL to its factory default settings?

 "Factory Default Settings (Initialization)" p. 56

• How do I operate the PLZ-4WL at a specified current? How do I save current values to the preset memory?

 "ABC Preset Memory" p. 45

• How do I edit sequence programs?

 "Sequences" p. 57

• How do I control the PLZ-4WL using external voltage?

 "External Control" p. 80

• How do I stop a sequence that is being executed?

 "Executing, Pausing, and Stopping

Sequences"

p. 77

• How do I use an external contact to turn the load on and off?

 "Turning the Load On and Off through

External Control"

p. 89

• I want to know about the backup battery’s replacement period.

 "Backup battery replacement" p. 97

• How should I clean the PLZ-4WL?

 "Cleaning the dust filter"

p. 96

• How do I calibrate the PLZ-4WL?

 "Calibration"

p. 98

Preparation

Setup Operation

Maintenance

PLZ-4WL 7

Front Panel

17 16

2122

2725

2423

0.00mA0.000

0.000

SLEWRATE

0:06:23

0.000

0.01

mA/s

SET

H 100A 30V

C . C

0.00

0.000

0.01

3230

34 35

36 37

Display

See

LEWRAT

No. Name Function

POWER switch

REMOTE Connector for expanding functions. –

TRIG OUT Produces a pulse signal during sequence or switching operation. p. 94

I MON OUT An output terminal for monitoring the current. p. 94

Remote sensing

terminals

DC INPUT The load input terminals for connecting the DUT and the PLZ-4WL. p. 17

Chassis terminal A terminal connected to the chassis. p. 17

Air inlet An air inlet for cooling. It has a dust filter. –

Handle A handle for carrying the PLZ-4WL. –

Rotary knob Used to make selections and change settings. p. 26

Flip the switch to the ( ) side to turn the power on. Flip it to the ( ) side to turn the power off.

Terminals for connecting remote sensing wires. p. 24

8 PLZ-4WL

p. 15

No. Name Function

CURSOR

INS key Inserts a step (sequence editing). –

DEL key Deletes a step (sequence editing). –

PREV key Returns to the previous screen (menu settings). –

NEXT key Switches to the next screen (menu settings). –

LOCAL key Used to switch to local mode from remote mode. p. 42

LOCK key Used to set the key lock. p. 41

ENTER key Used to confirm the input (menu settings). –

ABC key Used to save settings to the preset memory. p. 45

SHIFT key Shift key. p. 26

RECALL key Used to recall the setup memory. p. 48

STORE key Used to save the setup memory. p. 47

C key Used to access preset memory C. p. 45

PAUSE key Pauses the PLZ-4WL during sequence operation. p. 77

B key Used to access preset memory B. p. 45

RUN/STOP key Stops the PLZ-4WL during sequence operation. p. 77

A key Used to access preset memory A. p. 45

EDIT key Used to edit sequences. p. 57

LEVEL key Used to set the switching level to a current or conductance value. p. 36

% key Used to set the switching level to a percentage.

FREQ/DUTY key Used to set the switching frequency and duty ratio. p. 37

Th/TL key Used to set the switching time.

SW ON key Turns the switching function on and off. p. 37

LOAD key Turns the load on and off. p. 27

MODE key Switches the operation mode. p. 29

+CV key Adds CV mode (constant voltage) to CC or CR mode. p. 31 , p. 33

SET/VSET key Used to set the fundamental settings (current, conductance, voltage, or

MENU key Displays the menu setup screen. p. 54

RANGE key Switches between the appropriate ranges (current, conductance, voltage,

V RANGE key Switches between voltage ranges. –

SLEW RATE key Used to set the slew rate. p. 38

SHORT key Turns the short function on and off. p. 40

OPP/OCP key Used to set the power at which overpower protection (OPP) is activated or

UVP key Used to set the voltage at which undervoltage protection (UVP) is activated. p. 51

Current Range Displays the current range. –

Voltage range Displays the voltage range.

Lock icon Appears when the key lock is enabled. p. 41

Remote icon Appears during remote control. –

/FINE icon Indicates whether the rotary knob is set to coarse or fine adjustment. p. 26

ARSE

mA/A Displays the measured current value. –

V Displays the measured voltage value. –

W Displays the measured power value. –

Operation status Indicates the operation mode being used or the status.

Elapsed time Displays the amount of time that has elapsed since the load was turned on. p. 53

Setting Displays the fundamental setting (current, voltage, power, or conductance). –

Short icon Appears when the short function is being used. p. 40

Multi display Displays settings other than the fundamental setting.

Set operation mode Displays the set operation mode. –

Up, down, left, and right keys. –

power).

or power) for the current operation mode.

the current at which overcurrent protection (OCP) is activated.

In CC+CV mode, CC or CV is displayed. In CR+CV mode, CR or CV is displayed.

When a value can be set, it is underlined, and the item name is highlighted.

See

–

p. 50

p. 29

–

PLZ-4WL 9

Rear Panel

No. Name Function

Air outlet Vent for cooling the PLZ-4WL. –

AC INPUT Power inlet. p. 14

USB USB port for controlling the PLZ-4WL remotely. –

RS232C RS232C port for controlling the PLZ-4WL remotely. –

GPIB GPIB cable connector for controlling the PLZ-4WL remotely. –

J1 connector External control connector p. 80

Serial number The serial number of the PLZ-4WL. –

See

10 PLZ-4WL

Installation and Preparation

This chapter describes how to unpack and prepare this product before you use it.

Checking the Package Contents

Load input terminal cover (1 pc.)

Load input terminal screw set (2 pc.)

Power code (1 pc.)

[M1-100-012]

[M5-101-007]

[M4-100-007]

Load input terminal cover screws (2 pc.)

[M3-112-018]

[Q1-500-122]

Chassis connection wire (1 pc.)

[91-80-6940]

Setup Guide (1 pc.)

Quick Reference (Japanese 1sheet, English 1sheet)

CD-ROM (1 pc.)

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

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

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

oror

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 accessories have not been damaged during transportation.

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

We recommend that you keep all packing materials, in case the product needs to be transported at a later date.

Accessories

12 PLZ-4WL

Attachment to the rack adapter

Cover

Handle

Bracket

M4 flat-head screw

(M4 × 0.7 × 8)

Rivet

Foot

Screw pin

Before assemble the unit to the rack adapter, remove the handle and the feet. As for the instruction of mount assembly, please refer to the instruction manual of KRA series.

Install the suitable support angles applying to the used rack system to support the instrument.

In case the unit is disassembled from the rack adapter it is recommended that all the removed parts are kept in the storage.

Once the unit is disassembled from the rack adapter please attach all the removed parts to original location of each part.

Removing the handle and feet

Checking the Package Contents

Installation and Preparation

Pull up on the handle cover (two locations).

Unfasten the M4 flat-head screws (two locations) and remove the entire

handle.

While pulling down on the feet (there are four of them), use a

screwdriver to loosen their screw pins, and then remove them.

PLZ-4WL 13

Connecting the Power Cord

WARNING

To a properly grounded outlet

To avoid electric shock, observe the following precautions.

• This product is IEC Safety Class I equipment (equipment with a protective conductor terminal). Be sure to earth ground the product to prevent electric shock.

• Connect the protective conductor terminal to earth ground.

• Use the supplied power cord to connect to an AC power line. If the supplied power cord cannot be used because the rated voltage or the plug shape is incompatible, have a qualified engineer replace it with an appropriate power cord that is 3 m or less in length. If obtaining an appropriate power cord is difficult, consult your Kikusui agent or distributor.

• A power cord with a plug can be used to disconnect the product from the AC 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 supplied power cord for other devices.

This product falls under IEC Overvoltage Category II (energy-consuming equipment supplied from the fixed installation).

Check that the POWER switch is off.

Check whether or not the AC power line is compatible with the input

rating of the product.

The voltage that can be applied is any of the nominal power supply voltages in the range of 100 Vac to 240 Vac. The frequency is 50 Hz or 60 Hz.

Frequency range: 47 Hz to 63 Hz

Connect the power cord to the rear-panel AC INPUT.

Connect the power cord plug to an outlet with a ground terminal.

14 PLZ-4WL

Turning the Power On

Memo

Constant current (CC) mode is selected in this screen, so you can enter the current, which is the fundamental setting.

0.00mA0.000

0.000

SLEWRATE

0.500

0.01

mA/μs

SET

H 50A 30V

Turning the POWER switch on

If the POWER switch is turned on for the first time after purchasing the PLZ-4WL, the PLZ4WL starts up using factory default settings. For all other cases, the PLZ-4WL starts up using the settings that existed when the POWER switch was turned off the last time.

Load-on indicator LED

LOAD key

Check that the POWER switch is turned off ( ).

Installation and Preparation

POWER switch

The condition in which characters “SET” is highlighted is called the fundamental setting entry condition.

Check that the power cord is correctly connected.

Check that nothing is connected to the DC INPUT (load input terminal)

on the front panel.

Turn the POWER switch on ( ).

Check that the display is in the fundamental setting entry condition.

The measured value displayed (section with mA, V, and W unit) indicates coarse zero. The characters “SET” shown under the measured value is highlighted with an underline. You can enter the fundamental setting for the selected operation mode.

Push LOAD.

Check that the LED above the key illuminates.

Push LOAD again.

Check that the LED above the key turns off.

PLZ-4WL 15

If an odd sound, odd odor, fire, or smoke occurs around or in the PLZ-4WL, remove the power plug from the outlet or turn off the power switch.

Turning the Power On

See

Example for the PLZ164WL.

CAUTION

When the PLZ-4WL does not start properly

This section introduces what measures you can take when the PLZ-4WL does not start properly. If following the remedy shown here does not solve the problem, contact your Kikusui agent or distributor.

Nothing is displayed. Make sure that the power cord is connected

Abnormal current or voltage values are being displayed.

An alarm has occurred. A protection function has been activated. Eliminate

Checking the version

p. 54

You can check the firmware and ROM versions by selecting “1. Model Info” on the menu screen.

Model Information

[ PLZ164WL ]

VERSION

SUB 1.00 MAIN 1.02

properly, and then turn the POWER switch on again. Adjusts the contrast of the display.

Turn the PLZ-4WL POWER switch off and then on again.

all the cause of the alarm.

Firmware version

ROM version

p. 26

p. 49

Turning the POWER switch Off

Flip the POWER switch to the ( ) side to turn the PLZ-4WL off.

After you turn the POWER switch off, wait at least 5 seconds after the fan stops before you turn the POWER switch back on. Turning the PLZ-4WL on too soon after you turn it off can cause damage to the inrush current limiter circuit, as well as reduce the life of components such as the POWER switch and the internal input fuses.

The PLZ-4WL saves the panel settings (except the load on/off setting) that were in use immediately before the POWER switch was turned off. When you turn on the POWER switch, the PLZ-4WL starts up with the saved settings. If the POWER switch is turned off immediately after the settings have been changed, the last settings may not be stored.

16 PLZ-4WL

Load wiring

WARNING

CAUTION

• Improper use of load wires may lead to fire. Use load wires whose capacity is adequate for the PLZ-4WL’s rated output current.

• Possible electric shock. Use load wires whose rated voltage meets or exceeds the PLZ-4WL’s isolation voltage. For details on the PLZ-4WL’s isolation voltage, see Chap.7 "General specifications".

• Use a load wire with sufficient diameter for the current as well as non-flammable or flameresistant cover.

If the wiring that you use for the load has a high resistance, the voltage will drop significantly when current flows, and the voltage at the load input terminals may fall below the minimum operating voltage. Using the following table as a reference, select wiring whose nominal cross-sectional area is as thick as possible.

A wire’s temperature is determined by the resistive loss based on the current, the ambient temperature, and the wire’s external thermal resistance. The following table shows the current capacity of heat-resistant vinyl wires that have a maximum allowable temperature of 60 C when one of the wires is separated and stretched out horizontally in air in an ambient temperature of 30 C. The current must be reduced under certain conditions, such as when vinyl wires that have a low heat resistance are used, when the ambient temperature is 30 C or greater, or when wires are bundled together and little heat is radiated.

Nominal CrossSectional 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 –

AWG (Reference Cross-

Sectional Area) [mm

]

Allowable Current [A] (Ta = 30C)

KikusuiRecommended Current [A]

Installation and Preparation

Excerpts from Japanese laws related to electrical equipment.

PLZ-4WL 17

Methods for Ensuring Stable Operation

When you use the PLZ-4WL at a high response speed, it is important to reduce the inductance of the load wiring and configure the response speed setting appropriately. If the conditions are not configured appropriately, oscillation and other forms of operational instability may occur.

Reducing the load wiring inductance

Voltage generated by current changes

The wiring has an inductance of L. If current I changes quickly, a large voltage is induced on both sides of the wiring. All of this voltage will be applied to the load input terminals of the electronic load if the impedance of the DUT is low. Voltage E (hereafter referred to as the generated voltage), which is generated according to the wiring inductance L and the amount of current change I is expressed as follows:

EUT

Load input terminal

Generally, a wire’s inductance is approximately 1 µH per meter of wire. If the DUT and the electronic load are connected using 1 m of wire (total length of the positive and negative wiring), a change in current of 50 A/µs will generate a voltage of 50 V.

The negative load input terminal provides the reference potential for the external control signal. The generated voltage may cause the device connected to the external control signal to malfunction.

When the electronic load is in constant-voltage, constant-resistance, or constant-power mode, it uses the voltage at the load input terminals to change the load current. So it is easy for the electronic load to be influenced by the generated voltage.

PLZ-4WL

ΔI/ΔT

E = L × (ΔI/ΔT)

E: Generated voltage

L: Load wiring inductance

ΔI: Change in current

ΔT: Duration of time over which

the current changes

Large voltage drop caused by current changes during switching operation

Make the wiring to the DUT as short as possible, and twist it. When the wiring is long or contains a large loop, its inductance increases, and current changes caused by switching operations will result in large voltage drops.

If the instantaneous voltage value at the load input terminals drops below the minimum operating voltage, the recovery response will be delayed significantly. You need to be especially careful when the slew rate setting is high and when switching operation is performed at high currents.

18 PLZ-4WL

Current

See

Methods for Ensuring Stable Operation

Example of waveform

ΔI

ΔT

Voltage across the load input terminals

Minimum operating voltage

This change results in unstable oscillation and hunting.

To make sure that the voltage resulting from inductance remains within the range of the electronic load’s minimum operating voltage and maximum input voltage, make the wiring as short as possible and twist the wiring, or reduce the slew rate. If it is not necessary to operate at a high response speed, reduce the slew rate in CC mode, or reduce the response speed in CR mode.

Voltage across

the load input

terminals

Current

Current phase lag

Even during DC operation, it is possible for the phase lag of the current to result in unstable electronic-load control and oscillation. Make the wiring as short as possible, and twist it.

If you only need to use DC operation, connecting a capacitor and a resistor to the load input terminals can reduce oscillation. Do not exceed the capacitor’s ripple-current rating.

Installation and Preparation

Keep the wire short

100 cm or less

Device under test

–

Twist

Optimizing the response speed

You can change the response speed in CV mode and CR mode. The wiring inductance can cause the current to lag the voltage. This can result in unstable control of the PLZ-4WL and oscillation.

p. 52

To ensure stable operation, reduce the response speed.

PLZ-4WL Series Electronic Load

–

Example: R = 10 Ω, C = 100 µF

PLZ-4WL 19

Methods for Ensuring Stable Operation

CAUTION

Do not apply excessive voltages to the load input terminals

Do not apply a voltage that is greater than the maximum voltage of 30 Vdc to the load input terminals. Doing so may damage the product.

H 50A 30V

100.00A150.00

16.50

SLEWRATE

The maximum voltage that can be applied to the load input terminals is 30 Vdc. You cannot use voltages that exceed 30 Vdc. When excessive voltage is applied, the protection functions are activated. Lower the voltage of the DUT immediately.

ALARM

OVP

ENTER

0.000

SET

2.50 mA/μs

Match the polarities of the load input terminals and the DUT terminals

Connecting the electronic load to the DUT with the polarities reversed can result in the flow of excessive current and damage to the DUT and the electronic load.

Connect each load input terminal to the terminal on the DUT with the same polarity.

Device under test

H 50A 30V

H 500mA

ALARM

0.00mA0.000

Reverse

0.000

ENTER

0.000

SET

SLEWRATE

The protection functions are activated when a reverse voltage of approximately 0.4 V or greater is applied. If this happens, turn off the DUT immediately.

25.0 μA/μs

≤30 Vdc

PLZ-4WL Series

Electronic Load

20 PLZ-4WL

Connecting to the Load Input Terminals

WARNING

CAUTION

Positive terminal

Negative terminal

Load input terminals

Load input terminal cover

Cut to match the thickness

of the load wiring.

This section explains how to connect the DUT to the DC INPUT terminals on the front panel.

Possible electric shock.

• Do not touch the load input terminals when the output is turned on.

• Always use the load input terminal cover.

• To avoid damaging the product, observe the following precautions. Do not connect the DUT to the DC INPUT terminals when the load is on.

• To avoid overheating, observe the following precautions. Attach crimping terminals to the wires, and use the attached screw set to connect them.

Installation and Preparation

Using the load input terminal cover

Pass the wiring that you intend to connect to the load through the load input terminal cover. Cut the cover’s sleeves to match the thickness of the wiring

Connection procedure

Turn the POWER switch off.

Make sure that the output of the DUT is off.

Attach crimping terminals to the load wiring.

The DC INPUT terminals have open bolt holes (M8) for connecting the load wiring. Attach appropriate crimping terminals.

PLZ-4WL 21

Pass the wiring that you want to connect to the load through the

attached load input terminal cover.

Connecting to the Load Input Terminals

Nut (M8)

Load input terminal cover

Crimping terminal

Spring washer (M8)

Bolt (M8 × 18)

Load wiring

Chassis connection wire

Screw (M3 × 18)

Connect the load input terminal cover to the panel so that the terminals are not exposed.

Load wiring

Connect the load wiring to the load input terminals using the load input

terminal screw set that came with the PLZ-4WL.

Using the PLZ-4WL’s screws, connect one end of the chassis-

connection wire that came with the PLZ-4WL to the chassis, and connect the other end to the negative load input terminal.

If the DUT (a power supply or similar device) is grounded, connect the chassis connection wire to the positive or negative terminal in the same manner as the DUT. You can also float the chassis connection wire, not connecting it to the positive or negative terminal.

Push the load input terminal cover into the front panel, and then fix it

into place using the load input terminal cover screws that came with the PLZ-4WL (maximum tightening torque: 1 N-m).

Connect the load wires to the output terminals of the DUT.

Connect the positive load input terminal to the positive terminal of the DUT, and connect the negative load input terminal to the negative terminal of the DUT.

22 PLZ-4WL

Removing the terminal barrier

Connecting to the Load Input Terminals

A barrier is placed between the DC INPUT terminals when the PLZ-4WL is shipped from the factory. To avoid shorting between the terminals, we recommend that you leave the barrier in when you make connections.

When testing some types of devices, you may want to remove the barrier.

■ Removing the terminal barrier

Push the tab on the bottom side of the barrier, and pull the barrier towards you.

Terminal barrier

Push this part, and pull the barrier toward you.

Terminal barrier

Installation and Preparation

PLZ-4WL 23

Remote Sensing

CAUTION

DUT

PLZ-4WL Series

Electronic Load

-S

Remote sensing terminals

–

Red

White

Twist

Correct

Incorrect

The stripped wire is touching the chassis.

The wire strands are touching the chassis.

10 mm

STRIP-GAUGE

While pressing here with a screwdriver, insert the wire.

Single wire: AWG26 to AWG18

Twisted wire: AWG22 to AWG20

See

When the load wiring is long, the voltage drop caused by the wiring’s resistance cannot be ignored. “Remote sensing” is a function that can be used to compensate for this voltage drop. To accurately set the resistance, voltage, and power, use remote sensing.

Remote sensing makes operation more stable by improving the transient characteristics in the constant-resistance (CR), constant-voltage (CV), and constant-power (CP) modes.

• Never wire the sensing terminals while the POWER switch is turned on. Doing so may damage the internal circuitry.

• If a wire is disconnected during remote sensing, the PLZ-4WL and the DUT may be damaged. Make sure that wire connections are secure.

• Do not reverse the wiring of the OUT and COM terminals of the SENSING terminal. Doing so may damage the internal workings of the PLZ-4WL.

The table below indicates sizes of the wires that you can use to connect to the sensing terminals. Strip approximately 10 mm of coating from the end of the wiring.

Turn the POWER switch off.

Connect the sensing terminals to the DUT using sensing wires.

Connect the positive remote sensing terminal on the rear panel (+S) to the positive terminal (+) on the DUT. In the same way, connect the negative remote sensing terminal (-S) on the rear panel to the negative terminal (-) on the DUT. Connect the wiring as close to the DUT as possible.

Enabling remote sensing

p. 54

24 PLZ-4WL

To turn remote sensing on or off, from the menu, select “2. Configuration” > “4. Remote Sensing” > “Sensing.”

Basic Functions

This chapter explains the operations for each operation mode and other basic functions.

Panel Operation Basics

0.000

Fine adjustment

Small arrow

0.000

Coarse adjustment

Large arrow

0.00mA 0.000

0.000

SLEWRATE

0.000

0.01

mA/μs

SET

H 50 A 30 V

CR CV

Popup menu

You can perform operations from the operation panel on the front of the PLZ-4WL. The PLZ4WL produces a beeping sound to notify you when you make an invalid selection or perform an invalid key operation.

Function of the LOAD key

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

How to use the rotary knob

Use the rotary knob to set values such as the current and resistance. Turning the rotary knob clockwise increases a value and turning it counterclockwise decreases the value.

■ Coarse and fine adjustment

You can switch between coarse and fine adjustment by pressing the rotary knob. When the down arrow shown at the upper right corner of the screen is large, coarse adjustment is selected; when it is small, fine adjustment is selected.

The fine adjustment setting resolution is ten times that of coarse adjustment. During coarse adjustment, you can make even more coarse adjustments by holding LOCAL while you turn the rotary knob.

When you set a value, it is convenient to first use coarse adjustment to set the value roughly and then to switch to fine adjustment to set it precisely.

Popup menu operation

Some keys show a popup menu when you press them. If you press the key again while the menu is shown, the selected item changes. The selected item changes to the next lowest item each time you press the key. When you finish the key operation, the item at that point is selected, and the popup menu is cleared automatically.

How to use the SHIFT key

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

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

This manual denotes the operation of pressing a key while holding down SHIFT as SHIFT+(notation above the key). For example, the selection of the MENU key is denoted as “MENU (SHIFT+SET/VSET).” In this case, press SET/VSET while holding down SHIFT.

Adjusting the display contrast

You can adjust the contrast of the display by turning the rotary knob while you hold SHIFT.

26 PLZ-4WL

Turning the Load On and Off

CAUTION

See

The load is on when current is flowing through the PLZ-4WL or when the PLZ-4WL is supplying current. The load is off when current is not flowing through the PLZ-4WL and the PLZ-4WL is not supplying current. You can turn the PLZ-4WL’s load on and off by pressing LOAD. The terms “load on” and “load off” appear frequently in this manual, so please remember them.

To avoid damaging the PLZ-4WL, be sure to follow the proper procedures for turning the load on and off.

Turning the load on

Make sure that the load is off.

Apply the output of the DUT to the PLZ-4WL.

If you are using a relay, electromagnetic switch, or other device in the connection between the load input terminals and the output terminals of the DUT, turn the device on.

Basic Functions

p. 54

p. 89

p. 39

Press LOAD to turn on the load.

■ Starting with the load turned on

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

To start the PLZ-4WL with the load turned on, from the menu, select “2. Configuration” > “2. Power On” > “Load On” > “ON.” Turn the power switch off and then on again to enable the settings.

■ Displaying the time that has elapsed since the load was turned on

This function, which displays the time that has elapsed since the load was turned on, is useful when used in conjunction with undervoltage protection (UVP) in discharge tests of batteries and capacitors. By factory default, the time is not displayed.

To display the time from load on to load off, from the menu, select “1. Setup” > “1. Function” > “Count Time” > “ON.” Turn the power switch off and then on again to enable the settings.

■ Using an external control signal to turn the load on and off

You can turn the load on and off using external control signals from a relay or other device.

■ Gradually raising the PLZ-4WL’s input current

In constant current mode (CC mode), you can set the PLZ-4WL to raise its input current gradually (soft start).

PLZ-4WL 27

Turning the Load On and Off

See

Turning the load off

Press LOAD to turn off the load.

Turn off the output of the DUT. If you are using a relay, electromagnetic

switch, or other device in the connection between the load input terminals and the output terminals of the DUT, turn the device off.

■ Turning the load off after a specified amount of time

The function for turning the load off after a specified period of time is convenient for discharge testing of batteries and capacitors. By factory default, the load on timer is off.

p. 54

To turn the load on timer on, from the menu, select “1. Setup” > “4. Cut Off” > “Time,” and set the time. Turn the power switch off and then on again to enable the settings.

When the load turns off, a popup window appears indicating the input voltage at the time the load was turned off.

28 PLZ-4WL

Operation Modes

CC+CV CR+CV

CR CV CP

0.00mA0.000V

0.000W

SLEWRATE

0.000

0.01

mA/μs

SET

H 50 A 30 V

CR CV

Operation mode

MODE

SHIFT

MODE

SHIFT

The following four operation modes are available on the PLZ-4WL. Constant voltage mode can be added to constant current mode or constant resistance mode (+CV).

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

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

• Constant voltage mode (CV mode)

• Constant power mode (CP mode)

Switching between operation modes

To switch between operation modes, press MODE while the load is off.

You can press +CV (SHIFT+MODE) in CC mode or CR mode to add CV mode. You can add CV mode even while the load is on.

Basic Functions

PLZ-4WL 29

Constant Current Mode (CC mode)

Memo

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

Configuring CC mode

Select the operation mode, and set the current.

STORE

PAUSE

LOCK

ENTER

ABC

SHIFT

LOAD

SET / VSET

FREQ / DUTY

Th/TL

SWITCHING

RANGE

VRANGE

LEVEL

SHORT

EDIT

ABC

PRESET

MODE

LOAD

SW ON

Make sure that the load is off.

The load is off when the LED to the upper left of the LOAD key is off. If the LED is lit,

SLEW RATE

OPP / OCP

UVP

RUN / STOP

RECALL

SEQ

press LOAD to turn the load off.

When “SET” is highlighted, the PLZ-4WL is in the fundamental setting entry condition.

Press MODE to select the operation mode (CC).

The operation mode popup menu appears. Press MODE repetitively until CC is highlighted on the menu. After you select the

operation mode, the popup menu disappears, and “CC” appears on the display.

Press RANGE to select the current range.

The current range popup menu appears. Each time you press RANGE, the range switches between L, M, and H. Press RANGE

until the range that you want to select is highlighted. After you select a range, the popup menu disappears, and the range that you selected appears along with its full scale value. The full scale value varies depending on the model.

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

The voltage range popup menu appears. Each time you press VRANGE (SHIFT+RANGE), the voltage range switches between

4 V and 30 V. Press VRANGE (SHIFT+RANGE) until the range that you want to select is highlighted. After you select a voltage range, it appears on the display.

Check that the display is in the fundamental setting entry condition.

If SET is not highlighted, press SET/VSET to switch to the fundamental setting entry condition.

Turn the rotary knob to set the current.

The CC mode settings are complete. When you press LOAD, the LOAD LED lights, and the PLZ-4WL starts supplying current. You can change the current even when the load is on.

30 PLZ-4WL

Configuring CC+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

Memo

CC+CV mode is constant current mode (CC mode) with CV mode added to it. You can add CV mode even while the load is on.

Configure the constant current settings.

To configure the settings, refer to "Configuring CC mode".

Press +CV (SHIFT+MODE) to add CV mode.

The PLZ-4WL switches to CC+CV mode, and “CC+CV” appears on the display.

Make sure that the PLZ-4WL is in the fundamental setting entry

condition.

When “SET” is highlighted, the PLZ-4WL is in the fundamental setting entry condition.

If SET is not highlighted, press SET/VSET to switch to the fundamental setting entry condition.

Turn the rotary knob to set the current and voltage.

The value that you can set (current or voltage) changes when you press SET/VSET.

Constant Current Mode (CC mode)

Basic Functions

The CC+CV mode settings are complete. Press LOAD to start testing. You can change the current and voltage even when the load is on.

PLZ-4WL 31

Constant Resistance Mode (CR)

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

Memo

In constant resistance mode (CR mode), you set the inverse of the resistance, the conductance [S]. You can also display the resistance value converted from the conductance value.

Conductance [S] = 1/resistance []

You can also add constant voltage mode (+CV mode) to constant resistance mode (CR mode).

Configuring CR mode

Select the operation mode, and set the conductance.

When “SET” is highlighted, the PLZ-4WL is in the fundamental setting entry condition.

Make sure that the load is off.

The load is off when the LED to the upper left of the LOAD key is off. If the LED is lit, press LOAD to turn the load off.

Press MODE to select the operation mode (CR).

The operation mode popup menu appears. Press MODE repetitively until CR is highlighted on the menu. After you select the

operation mode, the popup menu disappears, and “CR” appears on the display.

Press RANGE to select the current range.

The current range popup menu appears. Each time you press RANGE, the range switches between L, M, and H. Press RANGE

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

The voltage range popup menu appears. Each time you press VRANGE (SHIFT+RANGE), the voltage range switches between

4 V and 30 V. Press VRANGE (SHIFT+RANGE) until the range that you want to select is highlighted. After you select a voltage range, it appears on the display.

Check that the display is in the fundamental setting entry condition.

If SET is not highlighted, press SET/VSET to switch to the fundamental setting entry condition.

The resistance value converted from the conductance value appears in the multi display. If a different value appears in the multi display, press SET/VSET to display the resistance.

32 PLZ-4WL

Turn the rotary knob to set the conductance.

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

Memo

The CR mode settings are complete. When you press LOAD, the LOAD LED lights, and the PLZ-4WL starts supplying current. You can change the conductance even when the load is on.

Configuring CR+CV mode

Constant Resistance Mode (CR)

When “SET” is highlighted, the PLZ-4WL is in the fundamental setting entry condition.

CR+CV mode is constant resistance mode (CR mode) with CV mode added to it. You can add CV mode even while the load is on.

Configure the constant resistance settings.

To configure the settings, refer to "Configuring CR mode".

Press +CV (SHIFT+MODE) to add CV mode.

The PLZ-4WL switches to CR+CV mode, and “CR+CV” appears on the display.

Make sure that the PLZ-4WL is in the fundamental setting entry

condition.

If SET is not highlighted, press SET/VSET to switch to the fundamental setting entry condition.

Turn the rotary knob to set the conductance and the voltage.

The value that you can set (conductance or voltage) changes when you press SET/ VSET.

Basic Functions

The CR+CV mode settings are complete. Press LOAD to start testing. You can change the conductance and voltage even when the load is on.

PLZ-4WL 33

Constant Voltage Mode (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

Memo

In constant voltage mode (CV mode), you set the voltage [V].

Configuring CV mode

Select the operation mode, and set the voltage.

Make sure that the load is off.

The load is off when the LED to the upper left of the LOAD key is off. If the LED is lit, press LOAD to turn the load off.

When “SET” is highlighted, the PLZ-4WL is in the fundamental setting entry condition.

Press MODE to select the operation mode (CV).

The operation mode popup menu appears. Press MODE repetitively until CV is highlighted on the menu. After you select the

operation mode, the popup menu disappears, and “CV” appears on the display.

Press RANGE to select the current range.

The current range popup menu appears. Each time you press RANGE, the range switches between L, M, and H. Press RANGE

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

The voltage range popup menu appears. Each time you press VRANGE (SHIFT+RANGE), the voltage range switches between

4 V and 30 V. After you select a voltage range, it appears on the display. Press VRANGE (SHIFT+RANGE) until the range that you want to select is highlighted.

Check that the display is in the fundamental setting entry condition.

If SET is not highlighted, press SET/VSET to switch to the fundamental setting entry condition.

Turn the rotary knob to set the voltage.

The CV mode settings are complete. When you press LOAD, the LOAD LED lights, and the PLZ-4WL starts supplying current. You can change the voltage even when the load is on.

34 PLZ-4WL

Constant Power Mode (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

Memo

In constant power mode (CP mode), you set the power [W].

Configuring CP mode

Select the operation mode, and set the power.

Make sure that the load is off.

The load is off when the LED to the upper left of the LOAD key is off. If the LED is lit, press LOAD to turn the load off.

Basic Functions

When “SET” is highlighted, the PLZ-4WL is in the fundamental setting entry condition.

Press MODE to select the operation mode (CP).

The operation mode popup menu appears. Press MODE repetitively until CP is highlighted on the menu. After you select the

operation mode, the popup menu disappears, and “CP” appears on the display.

Press RANGE to select the current range.

The current range popup menu appears. Each time you press RANGE, the range switches between L, M, and H. Press RANGE

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

The voltage range popup menu appears. Each time you press VRANGE (SHIFT+RANGE), the voltage range switches between

4 V and 30 V. Press VRANGE (SHIFT+RANGE) until the range that you want to select is highlighted. After you select a voltage range, it appears on the display.

Check that the display is in the fundamental setting entry condition.

If SET is not highlighted, press SET/VSET to switch to the fundamental setting entry condition.

Turn the rotary knob to set the power.

The CP mode settings are complete. When you press LOAD, the LOAD LED lights, and the PLZ-4WL starts supplying current. You can change the voltage even when the load is on.

PLZ-4WL 35

Switching

Th TL

FREQ

0[A

]

(

0 %

)

LEVEL[A

][S]

[%]

SET[A

]

(

100 %

)

Edge at which the pulse is output from the TRIG OUT connector

LEVEL: Switching level FREQ: Frequency of the switching

interval

Th: HIGH time of the switching

interval.

TL: LOW time of the switching

interval.

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 switching function is used to switch between two preset load currents. Switching can be performed in CC mode and CR mode.

Switching is suitable for transient-response testing of regulated DC power supplies and similar devices.

To use the switching function, you need to set a switching level and a switching interval and then turn on the switching function. You can configure switching while the load is on or off.

When you execute switching, a trigger signal is produced from the TRIG OUT terminal on the front panel.

Example in CC Mode

Setting the switching level

You can set the switching level to a current or conductance value or to a percentage.

■ Setting the switching level to a current or conductance value

Press LEVEL.

The LEVEL key lights, and in CC mode, the current can be set; in CR mode, the conductance can be set.

Turn the rotary knob to set the switching level.

■ Setting the switching level to a percentage

The specified current or conductance level is equivalent to 100 %.

Press % (SHIFT+LEVEL).

The LEVEL key lights, and you can set the switching level to a percentage.

36 PLZ-4WL

Turn the rotary knob to set the switching level (0.0 % to 100.0 %).

Setting the switching interval

Memo

You can set the switching interval by specifying a frequency and duty ratio or by specifying an amount of time.

■ Setting the switching interval by specifying a frequency and duty ratio

Set the frequency and the duty ratio (the ratio of HIGH to LOW). It does not matter whether you set the frequency or the duty ratio first. In the following example, the frequency will be set first.

Switching

Press FREQ/DUTY until “FREQ” is highlighted.

The FREQ/DUTY key lights, and the frequency can be set. Pressing FREQ/DUTY switches between “FREQ” and “DUTY.”

Turn the rotary knob to set the frequency (1 Hz to 50 kHz).

The frequency setting resolution varies depending on the specified frequency. The PLZ-4WL switches between units (Hz and kHz) automatically.

Press FREQ/DUTY to highlight “DUTY.”

The FREQ/DUTY key lights, and the duty ratio can be set.

Turn the rotary knob to set the duty ratio (5 % to 95 %).

The minimum time interval is 10 μs. The maximum duty ratio is limited as the frequency gets higher.

■ Setting the switching interval using two (HIGH and LOW) operation times (Th and TL)

Set the HIGH and LOW times. It does not matter whether you set the HIGH or LOW time first. In the following example, the HIGH time will be set first.

Press Th/TL (SHIFT+FREQ/DUTY) until “Th” is highlighted.

The Th/TL key lights, and the HIGH time can be set. Pressing Th/TL (SHIFT+FREQ/ DUTY) switches between “Th” and “TL.”

Basic Functions

Turn the rotary knob to set the HIGH time.

When you set Th, the fine adjustment setting resolution is 50 times that of coarse adjustment.

Press Th/TL (SHIFT+FREQ/DUTY) to highlight “TL.”

The Th/TL key lights, and the LOW time can be set.

Turn the rotary knob to set the LOW time.

Turning the switching function on and off

After you finish setting the switching level and the switching interval, turn on the switching function.

If you press SW ON when the switching function is off, the switching function will turn on, and the SW ON key will light.

If you press SW ON when the switching function is on, the switching function will turn off, and the SW ON key light will also turn off.

PLZ-4WL 37

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

You can use the slew rate to set the speed at which the current is changed. The slew rate is valid in constant current mode (CC mode). Use the slew rate when you are using the switching function and at other times when the current is being changed dramatically. You can set the slew rate according to the current range as an amount of current change per unit of time.

Setting procedure

Press SLEW RATE.

The SLEW RATE key lights.

Turn the rotary knob to set the slew rate.

38 PLZ-4WL

Soft Start

See

You can use the soft start function to raise the input current gradually. The soft start function is valid in constant current mode (CC mode). Soft start is useful when:

• The load is turned on at the same time that voltage is applied to the load input terminals.

• When the load is on and voltage is applied to it after a period of no input (0 V).

You can reduce the amount of output voltage distortion that occurs when the DUT starts by setting an appropriate soft start time.

Rise time of the DUT

Rise time of the PLZ-4WL

Basic Functions

p. 54

Input current

When the soft start time is too fast

If the current rise time that is determined by the slew rate and the current setting is longer than the soft start time, the actual rise time will be longer than the soft start time. If you want to raise the current according to the soft start time, increase the slew rate.

To set the soft start time (OFF, 100 µs, 200 µs, 500 µs, 1 ms, 2 ms, 5 ms, 10 ms, or 20 ms), from the menu, select “1. Setup” > “1. Function” > “Soft Start.”

Time

Input current

When the soft start time is appropriate

Time

PLZ-4WL 39

Short

See

SWITCHING

ENTER

SHORT

EDIT

SLEW RATE

RUN / STOP

UVP

PAU SE

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 A

0.01

mA/μs

SET

H 50A 30V

Short icon

p. 82

When the short function is enabled, the maximum current is set in CC mode or the minimum resistance is set in CR mode, and the short signal output of the J1 connector is turned on. The short signal output terminal is a relay contact (30 Vdc/1 A). You can drive an external relay for high currents or a similar device and short the load input terminals.

Be sure to use a dedicated driver circuit to drive a relay for high current. Please supply the dedicated driver circuit yourself.

DUT

High-current relay

Turning the short function on and off

PLZ-4WL Series

Relay

J1 connector on the rear panel

<28> <29>

Driver circuit

You can turn the short function on and off when the load is on.

If you press SHORT (SHIFT+SLEW RATE) while the short function is off, the short icon is displayed, and the short function turns on. In constant current mode (CC mode), the fundamental setting is set to the maximum current value; in constant resistance mode (CR mode), the fundamental setting is set to the minimum resistance value.

If you press SHORT (SHIFT+SLEW RATE) while the short function is on, the short icon

40 PLZ-4WL

disappears, and the short function turns off. The fundamental setting returns to the value that it was at before the short function was turned on.

Locking the Keys

See

You can lock the PLZ-4WL’s keys to prevent mistaken operations such as changes to the settings and overwriting of memory entries and sequence data. The following keys can be used even when the keys are locked.

• LOCK (SHIFT+LOCAL; locks and unlocks the keys)

• LOAD (turns the load on and off)

• A, B, and C (recall preset memory entries directly)

• A, B, and C and ENTER (used to recall preset memory entries using the safety function)

• RECALL, rotary knob, and ENTER (used to load setup memory entries)

• RUN/STOP (SHIFT+B), rotary knob (used to start and stop sequence execution)

Locking and unlocking the keys

Key icon

H 50A 30V

0.00mA0.000

0.000

0.500

SET

SLEWRATE

0.01

mA/μs

Basic Functions

p. 54

If you press LOCK (SHIFT+LOCAL) when the key icon is not displayed, the keys are locked, and the key icon appears.

When the key icon is displayed, if you press and hold LOCK (SHIFT+LOCAL) until the PLZ4WL produces a beeping sound, the keys are unlocked, and the key icon disappears.

By factory default, the keys are not locked when you turn the PLZ-4WL on. To start the PLZ-4WL with the keys locked, from the menu, select “2. Configuration” > “1.

Power On” > “Key Lock” > “ON.” Turn the power switch off and then on again to enable the settings.

PLZ-4WL 41

Switching from Remote Mode to Local Mode

0.00mA0.000

0.000

SLEWRATE

0.500

0.01

mA/μs

SET

H 50A 30V

Remote icon

When the PLZ-4WL is in remote mode, the remote icon appears on the display. To use the front panel to switch the PLZ-4WL back to local mode, press LOCAL.

42 PLZ-4WL

Advanced Operations

This chapter explains ABC preset memory, setup memory, protection functions, and the menu.

Memory Types

The PLZ-4WL is equipped with both preset and setup memory.

■ Preset memory

You can save fundamental settings (current, conductance, voltage, and power) that are used often in preset memory. Because you can recall saved settings just by pressing a key, this feature is very useful when you want to switch between three different types of output in order.

■ Setup memory

You can use setup memory to save all the PLZ-4WL settings. You can recall the contents of a memory entry when the load is off. Check the contents of the memory entry on the screen, and then turn on the load.

■ Differences between preset and setup memory

Item Preset Memory Setup Memory

Number of memory entries 3 100

Memory number A, B, or C. 0 to 99

Memo Not allowed. Allowed (up to 15 characters)

Saved settings Fundamental settings

When the load is on Memory entries can be saved

When the load is off Memory entries can be saved

(current, conductance, voltage, and power)

and recalled.

Operation mode Fundamental settings

(current, conductance, voltage, and

power) Current and voltage ranges Slew rate Switching level Switching interval Activation points of protection functions ABC preset memory

Memory entries can be saved but not recalled.

Memory entries can be saved and recalled.

44 PLZ-4WL

ABC Preset Memory

Preset memory C

Preset memory B

CC mode

H range

M range

L range

CR mode

H range

M range

L range

CP mode

H range

M range

L range

CV mode

Current Conductance

Power Voltage

H range

L range

Preset memory A

CC mode

H range

M range

L range

CR mode

H range

M range

L range

CP mode

H range

M range

L range

CV mode

H range

L range

Preset memory A

For example, when you save to preset memory A in CC+CV mode (current: M range, voltage: L range):

Saved here

You can save preset memory entries to A, B, or C. In A, B, and C, you can save fundamental settings for each range of each operation mode. You can save and load preset memory entries regardless of whether the load is on or off.

The protection-function-activation values are not saved. If the settings that you recall exceed the protection-function-activation values, an alarm will occur.

In CC+CV mode, memory entries for CC mode and CV mode are used. In CR+CV mode, memory entries for CR mode and CV mode are used.

Advanced Operations

Saving settings to ABC preset memory

PLZ-4WL 45

Operation Mode Fundamental Settings

CC mode Current

CR mode Conductance (resistance)

CP mode Power

CV mode Voltage

CC+CV mode Current and voltage

CR+CV mode Conductance (resistance) and voltage

For each range of each operation mode, you can save different settings to keys A, B, and C. You can save the settings even when the load is on.

In the operation mode that you want to create a memory entry for, set the

range and values.

Press ABC (SHIFT+ENTER).

The A, B, and C keys start blinking.

Of A, B, and C, press the key that you want to save the settings to.

The key that you press lights, and the settings are saved to the key that you selected. If you change the settings, the key light turns off.

ABC Preset Memory

See

Memo

Recalling ABC preset memory entries

There are two methods of recalling the preset memory, “SAFETY” and “DIRECT.”

SAFETY

You can recall a memory entry after first checking its contents on the display.

DIRECT

The settings of the setup memory entry are applied immediately.

The factory default setting is “SAFETY.”

p. 54

You can cancel by pressing PREV

(SHIFT+ ).

You can set the preset memory recall method (“SAFETY” or “DIRECT”) from the menu by selecting “1. Setup” > “3. Memory.”

■ Memory recall method (SAFETY)

Configure the proper operation mode and range settings for the preset

memory entry that you want to recall.

Press the key that corresponds to the preset memory entry (A, B, or C)

that you want to recall.

The selected key lights. The settings stored in the specified preset memory are displayed. You can recall a

different preset memory entry by pressing another preset memory key (A, B, or C).

H 50A 30V

0.00mA0.000

0.000

8.000 A

SET

RECALL

Check the contents of the preset memory entry, and press ENTER.

The selected key lights. The settings that correspond to the selected memory entry are recalled and applied. If you change the settings, the key light turns off.

■ Memory recall method (DIRECT)

Configure the proper operation mode and range settings for the preset

memory entry that you want to recall.

Press the key that corresponds to the preset memory entry (A, B, or C)

that you want to recall.

The selected key lights. The settings that correspond to the selected memory entry are recalled and applied. If you change the settings, the key light turns off.

2.000 A

Setting saved to the preset memory.

46 PLZ-4WL

Setup Memory

0.00mA 0.000

0.000

SET

H 50A 30V

. 1

STORE

ENTER

SLEWRATE

1.012 A/μs

Memo entry area

Memo

You can save up to 100 setup memory entries (0 to 99). The current settings of the items listed below are saved to the setup memory. You can add a memo of up to 15 characters in length to each memory entry. You can recall a saved memory entry by specifying its number.

• Operation mode

• Fundamental setting values at the time the entry is saved

• Current range

• Voltage range

•Slew rate

• ABC preset memory contents

• Switching level (current/conductance or percentage)

• Switching interval (frequency and duty ratio or an amount of time)

• Protection-function-activation values

Saving settings to setup memory

Advanced Operations

Set the operation mode, range, and other settings to the values that you

want to save.

Press STORE (SHIFT+RECALL).

The STORE key blinks, and the setup memory storage screen appears. The last

You can cancel by pressing PREV

(SHIFT+ ).

memory number that an entry has been saved to appears (when the PLZ-4WL has just been shipped, the number that appears is “0”).

Turn the rotary knob to select the memory number that you want to save

to.

If you select a memory number that has already been saved to, the previous settings are overwritten.

To enter a memo, press the key to move the cursor.

The cursor blinks beneath “No.” You can select characters by turning the rotary knob.

Use the and keys to move the cursor. You can register up to 15 characters. Press

to move the cursor back to the memory number.

Press ENTER.

The STORE (SHIFT+RECALL) key lights, and the settings are saved to the setup memory entry. If you change the settings, the key light turns off.

PLZ-4WL 47

Setup Memory

0.00mA0.000

0.000

SET

H 50A 30V

. 1

RECALL

ENTER

SLEWRATE

1.012 A/μs

Memo

Recalling setup memory entries

You can save almost all the settings, including the operation mode and range, to the setup memory. Please be aware that if the saved operation mode and range are different from the current settings, they will change.

Make sure that the load is off.

If the LOAD LED is lit, press LOAD to turn the load off.

Press RECALL.

The RECALL key blinks, and the setup memory recall screen appears. The last

You can cancel by pressing PREV

(SHIFT+ ).

memory number that an entry has been saved to appears (when the PLZ-4WL has just been shipped, the number that appears is “0”).

Turn the rotary knob to select the appropriate memory number.

If an entry has a memo, the memo will appear beneath the entry's memory number.

Press ENTER.

The RECALL key lights, and the setup memory settings are recalled. If you change the settings, the key light turns off.

48 PLZ-4WL

Protection Functions

0.00mA0.000

0.000

SET

H 50A 30V

ALARM

ENTER

SLEWRATE

2.500 A/μs

UVP

0:20:03

See

The protection functions can be used to automatically turn off the load or limit the current to prevent the PLZ-4WL’s internal circuitry from being damaged and to protect the DUT.

An alarm occurs when the protection functions are activated. When an alarm occurs, the load turns off (or the current is limited), and the ALARM STATUS pin (pin 20) of the J1 connector on the rear panel turns on (open-collector output from a photocoupler).

When the load turns off, a popup window appears on the screen.

Example of the display when UVP is activated

Protection function types

Advanced Operations

p. 118

The types of protection functions and what they do are listed below. How the protection functions operate in different operation modes is explained in the appendix.

Protection Function Protection-Function-Activation Value

Overcurrent protection (OCP)

Overvoltage protection (OVP)

Overpower protection (OPP)

Undervoltage

protection (UVP)

Reverse-connection

protection (REV)

Overheat protection

(OHP)

Alarm input

protection

If you choose to limit the current, the current is limited so that the protection-function-activation value is not exceeded. Current limiting stops after the alarm is released. UVP can be disabled. When a reverse voltage is detected, turn off the DUT immediately. If OHP is activated, check to make sure that the front panel inlet and the rear panel outlet are not blocked. Release the alarm of the PLZ-4WL after you release the alarm of the device connected to external control.

A specified current value (overcurrent-protectionactivation value) or 110 % of the maximum current range value

115 % of the maximum input voltage Load off

A specified power value (overpower-protectionactivation value) or 110 % of the maximum power

A specified minimum voltage value (undervoltage-

protection-activation value)

A reverse voltage at the load input terminals Load off

An internal power unit temperature that exceeds the defined limit

An L level (CMOS) signal received by the ALARM INPUT pin (pin 12) of the J1 connector

Protection-Function

Action

Load off or limit

Load off

PLZ-4WL 49

Protection Functions

See

CAUTION

See

When the remote sensing function is being used

p. 24

p. 54

The sensing point of the remote sensing function is the other end of the wire connected to the remote sensing terminal on the PLZ-4WL front panel. Connect the end of this wire to the output of the DUT that you want to sense. Measurements are made at the sensing point for determining the protection-activation-values of overvoltage protection (OVP), overpower protection (OPP), and undervoltage protection (UVP).

If a wire is disconnected during remote sensing, the PLZ-4WL and the DUT may be damaged. Make sure that wire connections are secure.

Details about overcurrent protection (OCP)

You can set the value at which OCP is activated.

You can also set the action that is performed when OCP is activated. By factory default, the action is set to LIMIT (the current is limited).

To change the action that is performed (“LIMIT” or “LOAD OFF”), from the menu, select “1. Setup” > “2. Protect Action” > “OCP.”

■ Setting the overcurrent-protection-activation value

You cannot set the overcurrent-protection-activation value in CC mode.

H 50A 30V

0.00mA0.000

p. 54

0.000

8.000

OCP

55.00

SET

181.5

OPP

Make sure that the load is off.

If the LOAD LED is lit, press LOAD to turn the load off.

Press OPP/OCP until OCP is highlighted on the display.

The OPP/OCP key lights. Pressing OPP/OCP switches between OCP and OPP.

Turn the rotary knob to set the overcurrent-protection-activation value.

Details about overpower protection (OPP)

You can set the value at which OPP is activated.

You can also set the action that is performed when OPP is activated. By factory default, the action is set to LIMIT (the power is limited).

To change the action that is performed (“LIMIT” or “LOAD OFF”), from the menu, select “1. Setup” > “2. Protect Action” > “OPP.”

■ Setting the overpower-protection-activation value

You cannot set the overpower-protection-activation value in CP mode.

H 50A 30V

0.00mA0.000

0.000

8.000

SET

181.5

OPP

OCP

55.00

50 PLZ-4WL

Protection Functions

See

Make sure that the load is off.

If the LOAD LED is lit, press LOAD to turn the load off.

Press OPP/OCP until OPP is highlighted on the display.

The OPP/OCP key lights. Pressing OPP/OCP switches between OCP and OPP.

Turn the rotary knob to set the overpower-protection-activation value.

p. 53

p. 24

Details about undervoltage protection (UVP)

You can set the value at which UVP is activated. You can disable UVP by setting the value to OFF.

If the auto load-off timer is on, when UVP is activated, the time from load on to load off is indicated in a popup window that appears.

■ Setting the undervoltage-protection-activation value

Press UVP (SHIFT+OPP/OCP).

The UVP key lights.

Turn the rotary knob to set the undervoltage-protection-activation value.

If you set the value to OFF, undervoltage protection is disabled.

Details about reverse-connection protection (REV)

When a reverse voltage is detected and the load is turned off, turn off the DUT immediately.

If you are using the remote sensing function and the sensing wires are connected in reverse, a reverse voltage will not be detected because no current will flow even when the load is turned on. Because there is no threat of damage or injury, no alarm occurs.

Advanced Operations

Clearing alarms

You can press ENTER when an alarm is activated to clear the alarm. However, the alarm will be activated again if its cause has not been eliminated.

When alarm input is being detected, release the alarm of the PLZ-4WL after you release the alarm of the device connected to external control.

PLZ-4WL 51

Response Speed

See

The PLZ-4WL operates by detecting the input current or voltage and controlling it through negative feedback. You can ensure stable operation by reducing the response speed.

The response speed can be specified in CV mode and CR mode.

The response speed is set to normal by factory default.

p. 54

To set the response speed of negative feedback in CV mode (“FAST” or “Normal”), from the menu, select “1. Setup” > “5. Response” > “CV Response.”

To set the response speed of negative feedback in CR mode (“FAST” or “Normal”), from the menu, select “1. Setup” > “5. Response” > “CR Response.”

52 PLZ-4WL

Elapsed Time Display and Auto Load-Off Timer

Time

Voltage

UVP activation 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 50A 30V

ALARM

ENTER

SLEWRATE

2.500 A/μs

UVP

0:20:03

See

0.00mA0.000

0.000

SET

H 50A 30V

TIME UP

ENTER

VOLTAGE

1.644 V

SLEWRATE

2.500 A/μs

See

Two convenient functions are available for the discharge tests of batteries.

• You can measure the time from the start of discharge to the cutoff voltage.

• You can measure the closed-circuit voltage after a specified time has elapsed since the

start of discharge (voltage measurement).

Elapsed time display (Count Time)

You can measure the time from when the load is turned on until when it is turned off.

As a condition for turning the load off, set the undervoltage-protection-activation voltage to the cutoff voltage. When the load turns off, a popup 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.

p. 54

To set whether or not to display the elapsed time (“ON” or “OFF”), from the menu, select “1. Setup” > “1. Function” > “Count time.”

Auto load-off timer (Cut Off Time)

Advanced Operations

In voltage measurement, the voltage immediately before the load turns off is measured. You can configure the PLZ-4WL to turn the load off after a specified amount of time has elapsed. After the load turns off, a popup window appears indicating the input voltage immediately before the load was turned off.

The auto load-off timer is disabled by default.

p. 54

PLZ-4WL 53

To set the auto load-off timer (OFF, 000:00:01 to 999:59:59), from the menu, select “1. Setup” > “4. Cut Off.”

Factory Default Settings (Initialization)

Example for the PLZ164WL.

The PLZ-4WL’s backup function saves the current settings, menu settings, and memory entries (ABC and preset) even after the power switch is turned off.

You can initialize the PLZ-4WL to set all of its settings to their factory defaults.

Turn the POWER switch off ( ).

Make sure that nothing is connected to the DC INPUT terminals (the load

input terminals) on the front panel.

While holding down ENTER, turn the POWER switch on ( ).

Keep holding ENTER until the display lights up and “SET CLR” appears. The PLZ-4WL will start up with the factory default settings.

SET CLR

[ PLZ164WL ]

VERSION

SUB 1.00 MAIN 1.02

SET CLR

is displayed.

56 PLZ-4WL

Sequences

This chapter explains the sequence function.

Sequence Function

10A

Execution (RUN)

STEP

910

(execution interval)

Trigger output

TIME BASE

Input current

The sequence function automatically executes instructions specified in advance one operation at a time. A variety of waveform simulations can be executed through the specification of a sequence of operations (steps). The sequence that you create is saved by the backup function even when the power is turned off.

Normal sequences and fast sequences

The sequence function enables you to use two types of sequences: normal sequences and fast sequences.

■ Normal sequences

For normal sequences, an execution time is assigned to each step. Up to 10 programs can be saved, and the maximum number of steps that can be contained in all programs combined is 256 steps. You can include commands to unpause the PLZ-4WL after it has been paused through the pressing of PAUSE or through an external trigger signal.

Input current

Step 1 Step 3Step 2

100 s

Ramp

(RAMP ON)

(RAMP OFF)

150 s

Step

80 s

Ramp

(RAMP ON)

0.5A

Time

■ Fast sequences

For fast sequences, the execution time of each step is determined by the TIME BASE (execution interval) setting. Each step has the same interval. The maximum number of steps is 1024. The high time resolution enables you to create high-speed simulations. You can save one fast sequence program.

58 PLZ-4WL

Common Sequence Editing Operations

This section describes the sequence editing operations that are common to all edit screens, such as moving the cursor within an edit screen, selecting items, entering values and characters, and turning pages. Please familiarize yourself with the functions of each key.

■ Moving the cursor

On the edit screen, you can change the value of the item at the position of the blinking cursor. You can move the cursor using the keys.

Pressing moves the cursor down, and pressing moves the cursor up. To move to a specific digit in a value or character in a string or to select a step-execution-pattern item,

press and to move the cursor to the left and right.

■ Selecting items

When an item has multiple choices to select from, turn the rotary knob to select the desired setting. For example, for items that can be turned on and off, you can turn the rotary knob clockwise to select ON and counterclockwise to select OFF.

■ Entering values

You can increase or decrease the value of a numerical setting by turning the rotary knob. If the value consists of many digits, you can press or to move the cursor directly to the

desired digit and increase or decrease only that digit. For example, if you want to set a value to 100, you can simply move the cursor to the hundreds digit, and enter 1 using the rotary knob.

Sequences

■ Entering characters (Memo)

You can register a memo of up to 11 characters in length for each program.

You can use memos to indicate the contents of a program. Not entering a memo will not affect the execution of the sequence. You can enter information such as the date and time of measurement, a test description, a program name, or differences in the setup conditions.

You can select alphanumeric characters by turning the rotary knob. When the desired character is displayed, press to move the cursor to the right, and enter the next character. To move the cursor to the left, press .

■ Turning pages

You can switch between edit screens by pressing SHIFT at the same time as , , , or . To move to the next screen, press NEXT (SHIFT+ ). To return to the previous screen, press PREV (SHIFT+ ).

PLZ-4WL 59

How Normal Sequences Work

See

Normal sequences are composed of two elements: programs and steps. Programs are groups of executable units called steps. The steps in a program are executed in ascending order, starting from step 001. A single execution of a program is completed after the program’s last step has been executed.

p. 64

Step 001 Step 002 Step 003

…

END

Step 001 Step 002 Step 003

…

END

Step 001 Step 002 Step 003

…

END

The maximum total number of steps is 256.

The maximum number of programs is 10.

Program

First configure the program settings, and then configure the step settings. The details of the method for configuring a normal sequence are explained in "Sequence

Example (Normal Sequence)".

60 PLZ-4WL

Editing Programs in a Normal Sequence

SEQ

PREV NEXT

No.

Memo

: Program

Mode

: NCC

Loop

: 0001

Range

: 50A, 30V

SEQ

PREV NEXT

Last Load :

Last Set :

0.000

Chain :

Top

Bottom

To configure a program, select one of four operation modes (CC, CR, CV, or CP). You can execute the same program repeatedly. You can also continue program execution by linking a program to another program. Linked programs can only be executed if they have the same operation mode and range. You can save up to 10 programs (No.1 to 10).

Press EDIT (SHIFT+A) to display a screen for configuring the programs in the sequence.

In the top screen, if you press when the cursor is at Loop, the bottom screen appears. In the bottom screen, if you press when the cursor is at Last Load, the top screen appears.

In the screens for configuring the programs in the sequence, you can configure the following items.

After you finish configuring the program settings, press NEXT (SHIFT+ ) to configure the step settings.

Item Setting Description

No. 1 to 10 Program number (11 is for the fast sequence)

Memo Up to 11 characters A memo

Mode NCC: CC mode

NCR: CR mode NCV: CV mode NCP: CP mode

Range PLZ164WL:

50 A/30 V, 5 A/30 V, 500 mA/30 V, 50 A/4 V, 5 A/4 V, 500 mA/4 V

PLZ334WL:

100 A/30 V, 10 A/30 V, 1 A/30 V, 100 A/4 V, 10 A/4 V, 1 A/4 V

Loop 1 to 9998

9999: Infinite repetition

Last Load OFF: Load off

ON: Load on

Last Set 0 to 100 % of the range The fundamental setting at the end of the

Chain OFF: The sequence ends

1 to 10

The program operation mode

The program current and voltage ranges

The number of times that the program will repeat.

The state of the load (on or off) after the sequence finishes.

sequence. This setting is valid when Chain is set to OFF.

Specifies the program that will be executed next. Only programs with the same operation mode and range can be executed.

Sequences

PLZ-4WL 61

Editing Steps in a Normal Sequence

SEQ EDIT

PREV NEXT

CC SET [A

]

END

TOTAL

000

Press INS (SHIFT+ ).

Step value

Step execution time

Step-execution pattern

After you finish configuring the program settings, press NEXT (SHIFT+ ) to configure the step settings.

You can specify one execution condition per step. One step corresponds to one executed operation in the executed waveform.

Adding steps

When you press INS (SHIFT+ ), a step is inserted above the currently highlighted step. Insert the number of steps that you want to execute. You can specify up to 256 steps for all of the up to 10 programs in a normal sequence.

Editing steps

After you have added steps, press and to highlight the step that you want to edit. There are three screens for editing steps. You can switch between screens by pressing NEXT

(SHIFT+ ) and PREV (SHIFT+ ).

SEQ EDIT

CC SET [A

001 0.005

002 0.010

END

TOTAL

PREV NEXT

002

]

A A

SEQ EDIT

CC SET [A

001

7.000

END

PREV NEXT

TOTAL

SEQ EDIT

[h:min:s.ms

001 100:00

002 000:00: 00.001

END

TOTAL

PREV NEXT

: .

002

]

001

]

SEQ EDIT

LOAD RAMP TRIG

001

ON OFF OFF OFF

002

OFF OFF OFF OFF

END

002

TOTAL

PAUSE

Step Editing Screen Contents

Step value The fundamental setting

Step execution time The time for which the step will be executed

Step-execution pattern Load on/off, ramp (step transition), trigger signal

during step execution, and pause

Step value

Set the fundamental setting (current, conductance, voltage, or power) value.

Step execution time

Set the time for which the step is executed (0:00:00.001 to 999:59).

62 PLZ-4WL

Editing Steps in a Normal Sequence

Example: Setting: 10 A Step transition (RAMP OFF) Step execution time: 1 s

Example: Setting: 10 A Ramp transition (RAMP ON) Step execution time: 1 s

1 s

10 A

1 s

10 A

See

Step-execution pattern

Set the execution pattern.

Item Setting Description

LOAD ON: Load on, OFF: Load off Turns the load on or off.

RAMP ON: Slope, OFF: Step The ramp (step transition)

TRIG ON: Output, OFF: Don’t output The trigger signal during step execution

PAUSE ON: Pause, OFF: Don’t pause Whether or not to pause

■ RAMP

Use this setting to specify the step transition. If you set RAMP to ON, the current changes in a slope within the step; if you set it to OFF, the current changes instantly and is sustained throughout the step.

Sequences

p. 91

■ TRIG

Use this setting to specify whether or not to produce a trigger signal. If you set TRIG to ON, the TRIG OUT terminal on the front panel produces a trigger signal when the step is executed.

Step n

Step n - 1

Example: Set trigger output at step number n

TRIG OUT

(TRIG ON).

■ PAUSE

Use this setting to specify whether or not to pause the program. If you set PAUSE to ON, the sequence is paused after the step is executed. To unpause the sequence, press PAUSE (SHIFT+C) on the front panel, or apply a trigger signal to the TRIG INPUT pin (pin 13) of the J1 connector.

Example: Pause and resume using the

Program in

PAUSE (SHIFT+C) key.

execution

Paused

PAUS E

PAUSE key

(SHIFT+C) (SHIFT+C)

Program execution resumed

PAUS E

PAUSE key

Example: Pause by executing

at step n

PAUSE ON

PAUSE in a program, and resume using trigger input (TRIG IN).

Paused

Trigger signal input

Program execution resumed

(TRIG IN)

Deleting steps

PLZ-4WL 63

Press and to highlight the step that you want to delete, and then press DEL (SHIFT+ ). The highlighted step is deleted.

Sequence Example (Normal Sequence)

10 A

7 A

8 A

5 A

Execution (RUN)

7 A

200 s

LOAD ON RAMP ON

7 A

150 s

LOAD ON RAMP OFF

10 A

200 s

LOAD ON RAMP ON

8 A

150 s

LOAD ON RAMP ON

10 A

200 s

LOAD ON RAMP ON

Step 1

Program 1 Program 2 Program 2

Step 1Step 2 Step 2Step 3 Step 3 Step 1 Step 3Step 2

Setting

0.5 A

80 s

LOAD OFF RAMP OFF

5 A

50 s

LOAD ON RAMP OFF

5 A

50 s

LOAD ON RAMP OFF

8 A

150 s

LOAD ON RAMP ON

TRIG

TRIG OFF TRIG OFF TRIGONTRIG OFF TRIG OFF

TRIG OFF

TRIG OFF TRIG OFF

TRIG OFF

Input current

This section explains how to use the operation panel to enter the following example sequence.

This section provides an example of how to execute a sequence with two programs on the PLZ164WL.

• Program 1

Memo: PROGRAM1, Mode: CC, Loop: 1, Chain: Program 2

Step Setting Step Execution Time LOAD RAMP TRIG

Step 1 7 A 200 s (3 min 20 s) On On Off

Step 2 7 A 150 s (2 min 30 s) On Off Off

Step 3 0.5 A 80 s (1 min 20 s) Off Off On

• Program 2

Memo: PROGRAM2, Mode: CC, Loop: 2 State that the load will be in after the sequence ends: Off, Current at the end of the sequence: 0 A, Chain: Off

Step Setting Step Execution Time LOAD RAMP TRIG

Step 1 10 A 200 s (3 min 20 s) On On Off

Step 2 5 A 50 s On Off Off

Step 3 8 A 150 s (2 min 30 s) On On Off

Program 2 starts after the three steps in program 1 have been executed. When the three steps in program 2 have been executed, the first execution of program 2 is finished. The sequence is complete when the second execution of program 2 is finished.

64 PLZ-4WL

Editing program 1

Memo

SEQ

PREV NEXT

No.

Memo

Mode

: NCC

Loop

: 0001

Range

: 50A, 30V

SEQ

PREV NEXT

No.

Memo

Mode

: NCC

Loop

: 0001

Range

: 50A, 30V

Program1

In this example, program 1 will be created first and then program 2. You can edit the programs in any order that you like. It is OK to create program 2 first and then create program

Sequence Example (Normal Sequence)

You can move the cursor by pressing , , , and .

To exit the sequence editing screens, press

PREV (SHIFT+ ).

SEQ

Last Load : OFF Last Set : Chain : OFF

PREV NEXT

0.000

Press EDIT (SHIFT+A).

The program editing screen appears.

Set the program number to 1.

If the cursor is not blinking at No., press and to move it there. Turn the rotary knob to select the number.

Press to move the cursor to Memo, and enter

“Program1.”

Enter the text using the rotary knob and and .

Press to move the cursor to Mode, and select an

operation mode (CC mode).

Turn the rotary knob to select NCC.

Press to move the cursor to Range, and set the

current and voltage ranges (50 A and 30 V).

Turn the rotary knob to select 50 A, 30 V.

Press to move the cursor to Loop, and set the

number of times to execute the program to 1.

Turn the rotary knob to select the number.

Press to move the cursor to Last Load, and

select the state that the load will be in after the sequence ends (select OFF).

In this example, program 2 will be executed after program 1, so this setting is ignored.

Sequences

Press to move the cursor to Last Set, and select

the current that the load will supply after the sequence ends (select 0 A).

In this example, program 2 will be executed after program 1, so this setting is ignored.

Press to move the cursor to Chain, and set the

number of the program to execute next to 2.

To execute program 2 next, select 2.

Press NEXT (SHIFT+ ) or ENTER.

The step value screen appears.

Before you set the steps for program 1, you can also configure program 2.

PLZ-4WL 65

Sequence Example (Normal Sequence)

Memo

Setting the steps of program 1

Set the current, execution time, and execution pattern of each step in program 1. The various items are set on separate screens. In this example the settings will be configured in the following order: current setting, execution time, and then execution pattern.

Setting the current

You can move the cursor by pressing and .

Press PREV (SHIFT+ ) to return to the previous screen.

Press DEL (SHIFT+ ) to delete a step.

SEQ EDIT

CC SET [A

END

TOTAL

PREV NEXT

SEQ EDIT

CC SET [A

001

END

PREV NEXT

TOTAL

SEQ EDIT

CC SET [A

001

002

END

TOTAL

PREV NEXT

7.000

000

001

A A

002

]

Press INS (SHIFT+ ).

Step 001 is inserted into the line with the highlighted dashes.

Set the current for step 1 to 7 A.

Turn the rotary knob to select 7.000 A.

Press to highlight the dashes, and then press

INS (SHIFT+ ).

Step 002 is inserted.

Set the current for step 2 to 7 A.

Turn the rotary knob to select 7.000 A.

Set the current for step 3 to 0.5 A in the same

manner as step 2.

Press NEXT (SHIFT+ ) or ENTER.

The step execution time screen appears.

Setting the execution time

You can move the cursor by pressing , , , and .

Press PREV (SHIFT+ ) to return to the previous screen.

SEQ EDIT

[h:min:s.ms

001

0:00: 00.001 002 0:00: 00.001 003 0:00: 00.001

END

PREV NEXT

TOTAL

SEQ EDIT

[h:min:s.ms

001

0:03: 20.0––

002

0:02: 30.0––

003 0:00: 00.001

END

PREV NEXT

TOTAL

]

003

]

003

Press to move the cursor to step 001.

At first, the execution time is 0:00:00.001.

Set the execution time for step 1 to 3 min 20 s.

You can press and to move the cursor to the digit that you want to change.

Turn the rotary knob to select 0:03:20.0--.

Press to move the cursor to step 002. Set the

execution time for step 2 to 2 min 30 s in the same manner that you set it for step 1.

Press to move the cursor to step 003. Set the

execution time for step 3 to 1 min 20 s in the same manner that you set it for step 1.

Press NEXT (SHIFT+ ) or ENTER.

The next editing screen appears.

66 PLZ-4WL

Setting the execution pattern

Memo

Sequence Example (Normal Sequence)

You can move the cursor by pressing , , , and .

Press PREV (SHIFT+ ) to return to the previous screen.

SEQ EDIT

LOAD RAMP TRIG

001

ON ON OFF OFF

002

ON OFF OFF OFF

003

OFF OFF ON OFF

END

TOTAL

003

PAUSE

Press to move the cursor to step 001.

For step 1, set LOAD and RAMP to ON.

Press to move the cursor to the item that you want to

set. Turn the rotary knob to choose a setting. Leave TRIG and

PAUSE set to OFF.

Press to move the cursor to step 002. For step 2, set LOAD to ON.

Leave RAMP, TRIG, and PAUSE set to OFF.

Press to move the cursor to step 003. For step 3, set TRIG to ON.

Leave LOAD, RAMP, and PAUSE set to OFF. All the settings for program 1 have been entered. Next we will edit program

Sequences

PLZ-4WL 67

Sequence Example (Normal Sequence)

Memo

Editing program 2

After you finish editing program 1, edit program 2.

You can move the cursor by pressing , , , and .

To exit the sequence editing screens, press

PREV (SHIFT+ ).

SEQ

No.

Memo

Program1

Mode

: NCC

Range

: 50A, 30V

Loop

: 0001

PREV NEXT

SEQ

No.

: 2

Memo

: Program2

Mode

: NCC

Range

: 50A, 30V

Loop

: 0002

PREV NEXT

SEQ

Last Load : OFF Last Set : Chain : OFF

PREV NEXT

0.000

Press PREV (SHIFT+ ) three times to display the

program editing screen.

Set the program number to 2.

If the cursor is not blinking at No., press and to move it there. Turn the rotary knob to select 2.

Press to move the cursor to Memo, and enter

“Program2.”

Enter the text using the rotary knob and and .

Press to move the cursor to Mode, and select an

operation mode (NCC mode).

Press to move the cursor to Range, and set the

current and voltage ranges to 50 A and 30 V.

Press to move the cursor to Loop, and set the

number of times to execute the program to 2.

Press to move the cursor to Last Load, and

select the state that the load will be in after the sequence ends (select OFF).

Press to move the cursor to Last Set, and select

the current that the load will supply after the sequence ends (select 0 A).

Press to move the cursor to Chain, and set it to

OFF.

To end the sequence after program 2 is executed twice, select OFF.

Press NEXT (SHIFT+ ) or ENTER.

The step value screen appears.

68 PLZ-4WL

Setting the steps of program 2

Memo

SEQ EDIT

PREV NEXT

002 0:00: 5000

001 0:03: 20––

003 0:02: 30––

[h:min:s.ms

]

END

TOTAL

003

The settings will be configured in the same order as they were for program 1.

Sequence Example (Normal Sequence)

You can move the cursor by pressing , , , and .

Press NEXT (SHIFT+ ) to move to the next screen.

Press PREV (SHIFT+ ) to return to the previous screen.

SEQ EDIT

CC SET [A 001 10.000 002 5.000 003 8.000

END

TOTAL

PREV NEXT

SEQ EDIT

LOAD RAMP TRIG

001

ON ON OFF OFF

002

ON OFF OFF OFF

003

ON ON OFF OFF

END

TOTAL

A A A

003

]

PAUSE

Set the currents for steps 1 to 3.

Set the current for step 1 to 10 A, for step 2 to 5 A, and for step 3 to 8 A.

Set the execution times for steps 1 to 3.

Set the execution time for step 1 to 3 min 20 s; for step 2 to 50 s, and for step 3 to 2 min 30 s.

Set the execution patterns for steps 1 to 3.

For step 1, set LOAD to ON, RAMP to ON, TRIG to OFF, and PAUSE to OFF. For step 2, set LOAD to ON, RAMP to OFF, TRIG to OFF, and PAUSE to OFF. For step 3, set LOAD to ON, RAMP to ON, TRIG to OFF, and PAUSE to OFF.

All the settings for program 2 have been entered.

Press PREV (SHIFT+) four times to exit the

sequence editing screen.

Each time you press PREV (SHIFT+), the previous screen is displayed. Keep pressing PREV (SHIFT+ ) until the screen

that was displayed before you started sequence editing appears.

Sequences

PLZ-4WL 69

How Fast Sequences Work

Step 0001 Step 0002 Step 0003

Step 1024

Program 11

...

The maximum number of steps is 1024.

See

The operation modes that you can execute fast sequences in are constant current (CC) mode and constant resistance (CR) mode.

Just like normal sequences, fast sequences are composed of two elements: programs and steps.

Programs are groups of executable units called steps. When program 11 is executed, its steps are executed in order, starting with step 0001. A single execution of a program is completed after the program’s last step has been executed.

First configure the program settings, and then configure the step settings.

p. 74

The details of the method for configuring a fast sequence are explained in "Sequence Example (Fast Sequence)".

70 PLZ-4WL

Editing a Fast-Sequence Program

SEQ

PREV NEXT

No.

Memo

: Program

Mode

: FCC

Loop

: 0003

Range

: 50A , 30V

Top

Bottom

To configure a fast-sequence program, you first need to set the operation mode to CC mode or CR mode. The program is executed the specified number of times.

Unlike with normal sequences, you cannot chain programs to be executed after the first program. You can save one program (No. 11).

Press EDIT (SHIFT+A) to display a screen for configuring the sequence’s program operation.

In the top screen, if you press when the cursor is at Loop, the bottom screen appears. In the bottom screen, if you press when the cursor is at Last Load, the top screen appears.

SEQ

Last Load : Last Set : 1 RPTSTEP : 15 TIME BASE : 1ms

PREV NEXT

.000

In the screens for configuring the programs in the sequence, you can configure the following items.

After you finish configuring the program settings, press NEXT (SHIFT+ ) to configure the step settings.

Item Setting Description

No. 11 Program number (1 to 10 are for the normal

Memo Up to 11 characters A memo

Mode FCC: CC mode

FCR: CR mode

Range 50 A, 30 V (example) The current and voltage ranges for the program vary

Loop 1 to 9998

9999: Infinite repetition

Last Load OFF: Load off

ON: Load on

Last Set 0 to 100 % of the range The current at the end of the sequence

RPTSTEP

TIME BASE

The minimum number of steps in a fast sequence is 3.

The setting resolution is 25 µs for values between 25 µs and 0.1 ms and 100 µs for values between

0.1 ms and 100 ms.

3 to 1024

25 µs to 100 ms

sequences)

The program operation mode

depending on the model.

The number of times that the program will repeat

The state of the load (on or off) after the sequence finishes

The last step number

Step execution time

Sequences

PLZ-4WL 71

Editing Steps in a Fast Sequence

.00

STEP:0014

Current

Step number

Trigger output

Magnification

Waveform display

Monitor screen

After you finish configuring the program settings, press NEXT (SHIFT+ ) to configure the step settings.

You can specify one execution condition (current and trigger output) per step. One step corresponds to one executed operation in the executed waveform.

The minimum number of steps in a fast sequence is 3. Even if you only specify settings for step 1 and step 2, when you execute a fast sequence, a step 3 will also be executed.

Editing steps

The number of steps that can be monitored is determined by the RPTSTEP setting (last step) that you specified when you edited the program.

Configure the following step settings in the monitor screen.

Item Setting Description

STEP 1 to 1024 Step number

Current or conductance 0 to 100 % of the range The current or conductance that is

produced at the step

Trigger output _: Off

T: On

The trigger signal during step execution

Each time you press , the cursor moves between items in this order: step number, current, trigger output setting, and then magnification.

Each time you press , the cursor moves between items in this order: magnification, trigger output setting, current, and then step number.

You can use the FILL function to set multiple steps at once.

■ Trigger output (TRIG)

Use this setting to specify whether or not to produce a trigger signal. If you set TRIG to ON, the TRIG OUT terminal on the front panel produces a trigger signal when the step is executed.

Step n

Step n - 1

Example: Set trigger output at step number n

TRIG OUT

(TRIG ON).

72 PLZ-4WL

Editing Steps in a Fast Sequence

See

Memo

Current

1.164 A

0.164 A

Step

100 101

200

.00A

STEP:0014

DATA1: 0.164A DATA2: 1.164A START: 0016 STOP :

ENTER

FILL

0100

Steps 16 to 100

.00A

STEP:0014

DATA1: 0.164A DATA2: 1.164A START: 0101 STOP :

ENTER

FILL

0200

Steps 101 to 200

(DATA2)

(DATA1)

(START)

(STOP)

(START)

(STOP)

Increasing the magnification in the step setting monitor screen

p. 73

You can increase the magnification that the steps are monitored at.

Press to move the cursor to the magnification, and use the rotary knob to change the magnification. There are eight magnifications, from M1 to M8. The numbers indicate the number of steps that are displayed on a single screen. M1 is the maximum magnification.

When you move the cursor to the step number by pressing and then change the step using the rotary knob, the waveform moves so that the selected step is in the center of the rectangular monitor area.

When the magnification is set to M1, you can use the rotary knob to move one step at a time and monitor the steps in detail. In the same way, when the magnification is M2, you can move by two steps at a time; when the magnification is M3, you can move by three steps at a time; and when the magnification is M8, you can move by eight steps at a time.

You can monitor all the steps up to the specified last step.

Press PREV (SHIFT+ ) to return to the previous screen.

FILL function

You can use the FILL function to automatically set the currents of a group of steps by setting the currents of the step on each end of the group.

In the monitor screen, press INS (SHIFT+ ) to display the FILL screen.

.00A

STEP:0014

FILL

DATA1: 0.164A

DATA2: 1.164A START: 0016 STOP : 1024

ENTER

Sequences

You can set the number of the last step to any value up to 1024, but the last step that can be monitored is determined by the value that you set for RPTSTEP when you edited the program.

Item Setting Description

DATA1 0 to 100 % of the range The current of the first step

DATA2 0 to 100 % of the range The current of the last step

START 1 to 1024 The step number of the first step

STOP

You can set the number of the last step to any value up to 1024, but the last step that can be monitored is determined by the value that you set for RPTSTEP.

1 to 1024

The step number of the last step

Press or to move the cursor to DATA1, and use the rotary knob to set the current of the first step. In the same way, set DATA2 (the current of the last step), START (the step number of the first step), and STOP (the step number of the last step).

After you have finished making the settings, press ENTER to return to the monitor screen.

In the example in the figure below, the same waveform is repeated twice.

First, set the first step to 16 and the current to 0.164 A, and set the last step to 100 and the current to 1.164 A. Then, set the first step to 101 and the current to 0.164 A, and set the last step to 200 and the current to 1.164 A.

PLZ-4WL 73

Sequence Example (Fast Sequence)

10A

Execution (RUN)

Trigger output

510

111516

510

10A

Execution (RUN)

STEP

9 101112131415

1ms

(execution interval)

Trigger output

STEP

Program 11

Input current

Magnified

This section explains how to use the operation panel to enter the following example sequence.

This section provides an example of how to execute a sequence on the PLZ164WL that will simulate the waveform shown in the figure below.

• Program 11

Memo: PROGRAM11, Mode: CC, Loop: 3, State that the load will be in after the sequence ends: On, Current at the end of the sequence: 1 A, Last step number: 15, Step execution time: 1 ms

Step Setting Trigger

Output

Steps 1 to 5 10 A Off

Step 6 5 A On

Steps 7 to 10 10 A Off

Step 11 5 A Off

Steps 12 to 15 10 A Off

When you execute the sequence, program 11 will be repeated three times (point A to B, point B to C, point C to D). After program 11 has been executed 3 times, it will finish, and the current will change to 1 A (point E).

74 PLZ-4WL

Editing program 11

Memo

SEQ

PREV NEXT

No.

Memo

Mode

: FCC

Loop

: 0003

Range

: 50A , 4V

Sequence Example (Fast Sequence)

You can move the cursor by pressing , , , and .

To exit the sequence editing screens, press PREV (SHIFT+ ).

SEQ

Last Load : Last Set : 1 RPTSTEP : 15

TIME BASE : 1ms

PREV NEXT

.000

Press EDIT (SHIFT+A).

The program editing screen appears.

Set the program number to 11.

If the cursor is not blinking at No., press and to move it there. Turn the rotary knob to select the number.

Press to move the cursor to Memo, and enter

“Program11.”

Enter the text using the rotary knob and and .

Press to move the cursor to Mode, and select an

operation mode (CC mode).

Turn the rotary knob to select FCC.

Press to move the cursor to Range, and set the

current and voltage ranges to 50 A and 4 V.

Turn the rotary knob to select 50 A, 4 V.

Press to move the cursor to Loop, and set the

number of times to execute the program to 3.

Turn the rotary knob to select the number.

Press to move the cursor to Last Load, and

select the state that the load will be in after the sequence ends (select ON).

Turn the rotary knob to select ON.

Press to move the cursor to Last Set, and select

the current that the load will supply after the sequence ends (select 1 A).

Turn the rotary knob to select the number.

Sequences

Press to move the cursor to RPTSTEP, and set

the step number of the last step to 15.

Turn the rotary knob to select the number.

Press to move the cursor to TIME BASE, and set

the step execution time to 1 ms.

Turn the rotary knob to set the time.

Press NEXT (SHIFT+ ) or ENTER.

The step value screen appears.

PLZ-4WL 75

Sequence Example (Fast Sequence)

.00

STEP:0014

Current

Step number

Trigger output

Magnification

Waveform display

Memo

Setting the steps of program 11

Set the current and trigger output of each step in program 11. In this example the current will be set first, followed by the trigger output.

Each time you press , the cursor moves between items in this order: step number, current, trigger output setting, and then magnification.

Each time you press , the cursor moves between items in this order: magnification, trigger output setting, current, and then step number.

Make sure that the cursor is blinking at STEP.

You can move the cursor by pressing and .

Press PREV (SHIFT+ ) to return to the previous screen.

If the cursor is not blinking at STEP, press and to move it there.

Turn the rotary knob to set the step number to 1.

Press to move the cursor to the current, and turn the rotary knob to

set the value to 10 A.

Press to move the cursor to STEP.

Set the currents for steps 2 through 5 to 10 A in the same way that you

set step 1.

Set the current for step 6 to 5 A.

Press to move the cursor to the trigger output setting, and turn the

rotary knob to select T.

Set the currents for steps 7 to 10 to 10 A.

Set the current for step 11 to 5 A.

Set the currents for steps 12 to 15 to 10 A.

All the settings for program 2 have been entered.

Press PREV (SHIFT+ ) twice to display the sequence editing screen.

Each time you press PREV (SHIFT+ ), the previous screen is displayed. Keep pressing PREV (SHIFT+ ) until the screen that was displayed before you started

sequence editing appears.

76 PLZ-4WL

Executing, Pausing, and Stopping Sequences

Memo

After you have finished configuring the sequence, execute it.

Executing sequences

H 50A 30V

SEL PROG NO

0.00mA0.000

PROG No

Program

0.000

RUN

SET

CC No

. 1:

Program

. 1

0.000

Press PREV (SHIFT+ ) to return to the previous screen.

Make sure that the switching and short functions are off.

Make sure that the SW ON key light is off and that the short icon is not displayed. Even if the light is on, when you enter the sequence execution screen, the switching and short functions will be turned off automatically.

Press RUN/STOP (SHIFT+B) or PAUSE (SHIFT+C) to display the

sequence execution screen.

Turn the rotary knob to select the number of the program that you want

to execute.

To execute a normal sequence, select a program number from 1 to 10. To execute a fast sequence, select program number 11.

Press RUN/STOP (SHIFT+B) to execute the selected sequence.

The sequence will be executed, and the measured values will appear on the display. When the sequence is completed, a popup window appears on the screen.

Press ENTER to exit the sequence execution screen.

If a step’s PAUSE setting has been set to ON, the sequence operation will pause after the step has been executed. To resume operation, press PAUSE (SHIFT+C).

Sequences

Pausing a sequence

If you press PAUSE (SHIFT+C) while a sequence is being executed, the sequence pauses, and the PAUSE screen appears.

H 50A 30V

0.00mA0.000

0.000

STOP CONT

SET

CC No

. 1:

Program

To resume the sequence, press PAUSE (SHIFT+C) again.

If you press RUN/STOP (SHIFT+B) while the sequence is paused, the sequence will stop.

PLZ-4WL 77

PAUSED

0.000

Executing, Pausing, and Stopping Sequences

Stopping a sequence

If you press RUN/STOP (SHIFT+B) while a sequence is being executed, the sequence will stop.

If you press RUN/STOP (SHIFT+B) again after stopping the sequence, the sequence will start over again from the beginning of the selected program.

When sequences cannot be executed

You cannot execute programs together in a sequence if their modes and ranges do not match.

When the load is on, if the current mode and range do not match those of the sequence that you are trying to execute, you will be unable to execute the sequence. First turn off the load, and then set the mode and range to match those of the sequence that you want to execute.

When the load is off, if the current mode and range settings do not match those of the sequence that you are trying to execute, the settings of the sequence are automatically changed to match the current settings.

Before Sequence Execution Sequence Execution

Load on/off state Mode and range settings

of the sequence that you are trying to execute

Load on Match the current settings Possible Same as the current settings

Do not match the current settings

Load off Match the current settings Possible Same as the current settings

Do not match the current settings

Execution Mode and range settings that are

executed

Not possible

Possible Automatically changed to the

current settings

78 PLZ-4WL

External Control

This chapter explains external control.

External Control

The settings in each operation mode normally use the internal reference signal. In external control, the reference signal is supplied externally. It is a voltage signal (analog voltage control). In addition, digital control, such as the turning on and off of the load, can be performed, and signals that indicate the status can be produced.

The J1 connector is used for external control.

Analog Voltage Control

CC, CP, CR, and CV mode values

Current to superimpose on the CC mode current

Digital Control

Turning the load on and off and monitoring its status

Range control for each operation mode

Unpausing during sequence operation

Forced alarm generation

Alarm clearing

Signal Output

Load on/off status signals

Range monitoring for each operation mode

Input current monitoring

Relay contact output for the short function

80 PLZ-4WL

About the J1 connector

Protective socket for J1

[84-49-0110]

WARNING

See

A protective socket is attached to the J1 connector when the PLZ-4WL is in the factory default state. Keep the protective socket in a safe place so that you can attach it to the J1 connector when the connector is not in use. If the protective socket is damaged or lost, contact your Kikusui agent or distributor.

Possible electric shock. The J1 connector contains pins that have the same potential as the output terminal. When the J1 connector is not in use, be sure to attach the protective socket that comes with the PLZ-4WL.

External Control

p. 134

Be sure to turn off the PLZ-4WL’s power switch before you attach or remove connectors. When you remove a connector, first release the lock lever on each side of the connector, and

then pull from the connector. The connector parts needed to connect the J1 connector (standard MIL 26-pin connector) are

not provided. The recommended connectors are shown in the following table.

Manufacturer Product Notes

Omron XG5M-2632 or XG5M-2635

XG5S-1301 (2 pcs.)

Omron XG4M-2630, XG4T-2604 For flat cables

KEL 6200-026-601 For flat cables

For information about how to use these tools and components, see the OMRON Corporation or KEL Corporation catalogs.

When using a flat cable, be sure to use a connector with a strain relief. To press-fit discrete wires or flat cables, be sure to use a special tool. For a description of

applicable cables and tools, see the catalog of the relevant connector manufacturer.

An optional OP01-PLZ-4WL External Control Connector Kit is available for making the connection.

For discrete wires

External Control

PLZ-4WL 81

External Control

External control connector

J1 connector pin number

J1 connector pin arrangement

Signal Name Description

No.

1 EXT CONT MODE For controlling CC, CR, and CP mode through external voltage. 0 V to 10 V correspond

2 A COM Connected to the negative load input terminal.

3 EXT CONT ADD For controlling CC mode through external voltage. External input voltages in the range

4 A COM Connected to the negative load input terminal.

5 EXT CONT CV For controlling CV mode through external voltage. External input voltages in the range

6 A COM Connected to the negative load input terminal.

7 IMON Current monitor output. 10 V for full scale (H/L range), 1 V for full scale (M range)

8 A COM Connected to the negative load input terminal.

9 LOAD ON/OFF CONT The load is turned on by a low (or high) CMOS level signal. The logic levels can be

10 RANGE CONT 1

11 RANGE CONT 0

12 ALARM INPUT The alarm is activated by a low CMOS level signal. The internal circuit is pulled up to 5

13 TRIG INPUT Unpauses the PLZ-4WL if a low CMOS level signal is applied for 10 µs or more. The

14 ALARM CLEAR INPUT The alarm is cleared by a low CMOS level signal. The internal circuit is pulled up to 5 V

15 A COM Connected to the negative load input terminal.

16 A COM Connected to the negative load input terminal.

17 LOAD ON STATUS

18 RANGE STATUS 1

19 RANGE STATUS 0

20 ALARM STATUS Turns on when a protection function (OVP, OCP, OPP, OHP, REV, or UVP) is activated

21 N.C. ---

to 0 % to 100 % of the rated current (CC mode) or rated power (CP mode). In CR mode, external input voltages in the range of 0 V to 10 V correspond to the range of resistances from the maximum resistance to the minimum resistance.

of -10 V to +10 V correspond to the range of currents from 0 % of the rated current to 100 % of the rated current. The value is superimposed to the panel and remote control setting.

of 0 V to 10 V correspond to the range of voltages from 0 % of the rated voltage to 100 % of the rated voltage.

switched. The internal circuit is pulled up to 5 V by a 10 k

Input for switching the range externally. k

 resistor. Valid only when the front panel setting is H range.

V by a 10 k

internal circuit is pulled up to 5 V by a 10 k

by a 10 k

Turns on when the load is on. Open collector output by a photocoupler.

Range status output.

or when an external alarm is applied. Open collector output by a photocoupler.

 resistor.

The internal circuit is pulled up to 5 V by a 10

 resistor.

Open collector output by a photocoupler.

82 PLZ-4WL

RANGE CONT 0 RANGE CONT 1

H range H H

M range H L

L range L H

RANGE STATUS 0 RANGE STATUS 1

H range OFF OFF

M range OFF ON

L range ON OFF

DUT

PLZ-4WL Series

ACOM

External control terminal

External device

Load input terminals

Do not connect

Attach a ferrite core

Common terminal

Signal Name Description

No.

22 STATUS COM STATUS signal common for pins 17 to 20.

23 N.C. ---

24 N.C. ---

25 SHORT SIGNAL OUT Relay contact output (30 VDC/1 A)

26 SHORT SIGNAL OUT

Valid only when the front panel setting is H range.

The maximum applied voltage of the photocoupler is 30 V, and the maximum current is 8 mA.

External Control

Precautions for high-speed load simulations

During high-speed load simulation, do not connect the common terminal of the external device to the terminal of the DUT (the terminal that is connected to the negative input terminal of the PLZ-4WL). Attach a commercially available ferrite core to the wiring between the PLZ4WL and the external device.

External Control

PLZ-4WL 83

Controlling Constant Current Mode (CC Mode) Externally

CAUTION

Input current Io

External voltage Ein

0 V 10 V

: Rated current

See

When you apply an external voltage of 0 V to 10 V to the PLZ-4WL, the input current varies in accordance with the voltage.

An external voltage of 0 V results in an input current of 0 A. An external voltage of 10 V results in an input current of 100 % of the specified range.

The precision of the PLZ-4WL cannot be guaranteed for voltages below 0 V or above 10 V.

Connected pins: J1-1 (signal), J1-2 (common)

To avoid damaging the PLZ-4WL, observe the following precautions.

• The maximum voltage that can be applied across pins 1 and 2 of the J1 connector is ±11 V. Do not apply a voltage that exceeds this value.

• Pin 2 of the J1 connector is connected the negative load input terminal. Make sure that the wire of pin 2 does not touch any of the other pins.

p. 54

EXT CONT MODE

pprox. 10 kΩ

A COM

To avoid noise interference, use a highly stable, low-noise external voltage source and twisted signal wires.

Turn the POWER switch off.

Connect the external voltage across pins 1 and 2 of the J1 connector.

Turn the POWER switch on, and make sure that the load is off.

Set the operation mode and the current range.

If you also want to control the current range externally, be sure to set the range to H.

From the menu, select “2. Configuration” > “3.External” > “Control CC/

CR/CP” > “ON.”

Doing so enables the external control of CC, CR, and CP mode.

Turn the power switch off and then on again.

The menu settings are applied.

Twist

Ein

–

Im×Ein

Io: Input current

Im: Rated current Ein: External voltage

0 ≤ Ein ≤ 10 V

84 PLZ-4WL

Controlling Constant Resistance Mode (CR Mode) Externally

CAUTION

Gm×Ein

R0 : Operating resistance

Ein : External voltage 0 ≤ Ein ≤ 10 V

Gm : Rated conductance

Ein

A COM

EXT CONT MODE

Approx. 10 kΩ

Twist

–

External voltage Ein

0 V 10 V

: Rated conductance (S)

Conductance

See

When you apply an external voltage of 0 V to 10 V to the PLZ-4WL, the resistance varies in accordance with the voltage.

An external voltage of 0 V results in the maximum resistance. An external voltage of 10 V results in the minimum resistance.

The precision of the PLZ-4WL cannot be guaranteed for voltages below 0 V or above 10 V. Connected pins: J1-1 (signal), J1-2 (common)

To avoid damaging the PLZ-4WL, observe the following precautions.

• The maximum voltage that can be applied across pins 1 and 2 of the J1 connector is ±11 V. Do not apply a voltage that exceeds this value.

• Pin 2 of the J1 connector is connected the negative load input terminal. Make sure that the wire of pin 2 does not touch any of the other pins.

p. 54

To avoid noise interference, use a highly stable, low-noise external voltage source and twisted signal wires.

Turn the POWER switch off.

Connect the external voltage across pins 1 and 2 of the J1 connector.

Turn the POWER switch on, and make sure that the load is off.

Set the operation mode and the current range.

If you also want to control the current range externally, be sure to set the range to H.

From the menu, select “2. Configuration” > “3.External” > “Control CC/

CR/CP” > “ON.”

Doing so enables the external control of CC, CR, and CP mode.

External Control

PLZ-4WL 85

Turn the power switch off and then on again.

The menu settings are applied.

Controlling Constant Power Mode (CP Mode) Externally

CAUTION

Input power Po

External voltage Ein

0 V 10 V

: Rated power

See

When you apply an external voltage of 0 V to 10 V to the PLZ-4WL, the power varies in accordance with the voltage.

An external voltage of 0 V results in a power of 0 W. An external voltage of 10 V results in a power of 100 % of the specified range.

The precision of the PLZ-4WL cannot be guaranteed for voltages below 0 V or above 10 V.

Connected pins: J1-1 (signal), J1-2 (common)

To avoid damaging the PLZ-4WL, observe the following precautions.

• The maximum voltage that can be applied across pins 1 and 2 of the J1 connector is ±11 V. Do not apply a voltage that exceeds this value.

• Pin 2 of the J1 connector is connected the negative load input terminal. Make sure that the wire of pin 2 does not touch any of the other pins.

p. 54

Pm×Ein

EXT CONT MODE

pprox. 10 kΩ

A COM

To avoid noise interference, use a highly stable, low-noise external voltage source and twisted signal wires.

Turn the POWER switch off.

Connect the external voltage across pins 1 and 2 of the J1 connector.

Turn the POWER switch on, and make sure that the load is off.

Set the operation mode and the current range.

If you also want to control the current range externally, be sure to set the range to H.

From the menu, select “2. Configuration” > “3.External” > “Control CC/

CR/CP” > “ON.”

Doing so enables the external control of CC, CR, and CP mode.

Turn the power switch off and then on again.

The menu settings are applied.

Twist

–

Po: Input power

Ein

Pm: Rated power Ein: External voltage

0 ≤ Ein ≤ 10 V

86 PLZ-4WL

Controlling Voltage Mode (CV mode and the +CV modes)

CAUTION

See

When you apply an external voltage of 0 V to 10 V to the PLZ-4WL, the voltage that it produces varies in accordance with the external voltage.

An external voltage of 0 V results in a voltage of 0 V. An external voltage of 10 V results in a voltage of 100 % of the specified range.

Connected pins: J1-5 (signal), J1-6 (common)

To avoid damaging the PLZ-4WL, observe the following precautions.

• The maximum voltage that can be applied across pins 5 and 6 of the J1 connector is ±11 V. Do not apply a voltage that exceeds this value.

• Pin 6 of the J1 connector is connected the negative load input terminal. Make sure that the wire of pin 6 does not touch any of the other pins.

: Rated voltage

Input voltage Vo

0 V 10 V

External voltage Ein

External Control

p. 54

EXT CONT CV

pprox. 10 kΩ

A COM

To avoid noise interference, use a highly stable, low-noise external voltage source and twisted signal wires.

Turn the POWER switch off.

Connect the external voltage across pins 5 and 6 of the J1 connector.

Turn the POWER switch on, and make sure that the load is off.

Set the operation mode and the current range.

If you also want to control the current range externally, be sure to set the range to H.

From the menu, select “2. Configuration” > “3.External” > “Control CV”

> “ON.”

Doing so enables the external control of CV mode.

Turn the power switch off and then on again.

The menu settings are applied.

Twist

Ein

–

Vm×Ein

Vo: Input voltage

Vm: Rated voltage Ein: External voltage

0 ≤ Ein ≤ 10 V

PLZ-4WL 87

Superimposing Constant Current Mode (CC Mode)

CAUTION

See

You can superimpose current on the CC mode panel/remote settings by applying an external voltage of -10 V to 10 V to the PLZ-4WL.

When the panel and remote control current setting is 0 A, an external voltage of 0 V results in an input current of 0 A, and an external voltage of 10 V results in an input current of 100 % of the specified range.

When the panel and remote control current setting is greater than 0 A and a positive external voltage is applied, an input current proportional to the applied voltage is added to the input current setting. On the other hand, if a negative external voltage is applied, an input current proportional to the applied voltage is subtracted from the input current setting. Regardless of whether the external voltage is positive or negative, the range of the input current is from 0 A to 100 % of the specified range.

The precision of the PLZ-4WL cannot be guaranteed for voltages below -10 V or above 10 V.

Connected pins: J1-3 (signal), J1-4 (common)

To avoid damaging the PLZ-4WL, observe the following precautions.

• The maximum voltage that can be applied across pins 3 and 4 of the J1 connector is ±11 V. Do not apply a voltage that exceeds this value.

• Pin 4 of the J1 connector is connected the negative load input terminal. Make sure that the wire of pin 4 does not touch any of the other pins.

p. 54

EXT CONT ADD

pprox. 10 kΩ

To avoid noise interference, use a highly stable, low-noise external voltage source and twisted signal wires.

1 2 3 4

A COM

Turn the POWER switch off.

Connect the external voltage across pins 3 and 4 of the J1 connector.

Turn the POWER switch on, and make sure that the load is off.

Set the operation mode and the current range.

If you also want to control the current range externally, be sure to set the range to H.

From the menu, select “2. Configuration” > “3. External” > “ADD CC” > “ON.”

Doing so enables the modification of CC mode through external control.

Twist

Ein

Im×Ein

Io: Input current Im: Rated current Ein: External voltage

Iset: Panel and remote

+ Iset

-10 ≤ Ein ≤ 10 V

control setting

Turn the power switch off and then on again.

The menu settings are applied.

88 PLZ-4WL

Turning the Load On and Off through External Control

See

Off

H = On

L = Off

▼ indicates that the LOAD key has been pressed.

The LOAD has been turned on by the external contact, so the load key is valid.

The LOAD key is invalid. Even if the LOAD key is pressed, the load will not turn on.

For the external contact to turn the load on again, the load must first be turned off once.

External contact

Load

Example when the load is turned on by a high level signal from the external contact

You can use an external control signal to turn the load on and off, and you can check whether the load is on or off.

Signal Input for turning the load on and off

To turn the load on and off using an external contact, you need to apply an external signal across pin 9 and 15 or 9 and 16 of the J1 connector.

When you turn the load off through an external contact, the LOAD key on the front panel becomes invalid.

p. 54

You can select the logic (LOW or HIGH) to use to turn the load on and off using the menu setup. Select “2. Configuration” > “3. External” > “Load On Input.” Turn the power switch off and then on again to enable the settings.

If you are not going to control the output using an external contact, set the logic to “HIGH” (the default setting).

Load On Input

LOW Load on Load off

HIGH Load off Load on

+5 V

pprox. 10 kΩ

LOAD ON/OFF CONT

A COM

The input pin is pulled up to the internal circuit’s +5 V level by a resistor that is approximately 10 k. The maximum allowable voltage is 5 V. The logic threshold levels are CMOS.

External Contact

ON (closed) OFF (open)

15,16

External Control

PLZ-4WL 89

Turning the Load On and Off through External Control

Load on Load off

Photocoupler On Off

Load-on status signal output

To monitor the status (on or off) of the load externally, monitor the output signal across pins 17 and 22 of the J1 connector.

Photocoupler (P.C)

Maximum applied voltage: 30 V Maximum current: 8 m

90 PLZ-4WL

Using a Trigger Signal to Control the PLZ-4WL

A COM

100 ms or greater

Input a signal with a pulse interval of 100 ms or greater.

0 V

15,16

Approx. 10 kΩ

+5 V

TRIG INPUT

The application of a trigger signal during sequence execution unpauses the PLZ-4WL. Use a trigger signal when you want to synchronize the PLZ-4WL with an external device.

Trigger signal input

Apply a voltage signal with a maximum allowable voltage of 5 V and a pulse width of 10 µs or more across pins 13 and 15 or 13 and 16 of the J1 connector.

The trigger signal is output on the rising edge of the pulse signal applied to the trigger input terminal.

The input pin is pulled up to the internal circuit’s +5 V level by a resistor that is approximately 10 k. The maximum allowable voltage is 5 V. The logic threshold levels are CMOS.

External Control

PLZ-4WL 91

Controlling the Current Range Externally

Photocoupler (P.C)

18 , 19

Maximum applied voltage: 30 V Maximum current: 8 mA

You can use an external control signal to control the current range. You can use the range status output to monitor the present state of the range.

You cannot control the voltage range.

Current Range

PLZ 164WL

H 50 A 100 A HIGH HIGH OFF OFF

M 5 A 10 A HIGH LOW OFF ON

L 0.5 A 1 A LOW HIGH ON OFF

HIGH: 5 V, LOW: 0 V

OFF: OPEN, ON: SHORT

PLZ 334WL

Control Input

RANGE CONT 0

RANGE CONT 1

Set the current range on the panel to the H range.

The current range cannot be changed when the load is turned on. The control signal input received while the load is turned on is ignored.

Input for switching the range externally

Use pins 10 (RANGE CONT 1) and 11 (RANGE CONT 0) of the J1 connector (use pin 15 or 16 as the common).

The signal is 2 bit.

The control terminals are pulled up to the internal circuit’s +5 V level by a resistor that is approximately 10 k. The maximum allowable voltage is 5 V. The logic threshold levels are CMOS.

pprox. 10 kΩ

+5 V

A COM

10,11

15,16

Status Output

RANGE STATUS 0

RANGE STATUS 1

Range status output

Use pins 18 (RANGE STATUS 1) and 19 (RANGE STATUS 0) of the J1 connector (pin 22 is common).

The signal is 2 bit.

92 PLZ-4WL

Alarm Signal

+5 V

Approx. 10 kΩ

A COM

15,16

100 ms or greater

Input a signal with a pulse width of 100 ms or greater.

0 V

+5 V

You can use an external control signal to activate the PLZ-4WL’s alarm. You can also use the alarm status output to monitor the alarm status (whether or not it is activated).

Alarm input

pprox. 10 kΩ

Alarm release input

Apply an external signal to pins 14 and 15 or 14 and 16 of the J1 connector.

+5 V

A COM

15,16

Apply an external signal to pins 12 and 15 or 12 and 16 of the J1 connector.

The alarm is activated by a low level signal.

The alarm input terminals are pulled up to the internal circuit’s +5 V level by a resistor that is approximately 10 k. The maximum allowable voltage is 5 V. The logic threshold levels are CMOS.

External Control

After an alarm has occurred, a low level signal applied after the reason for the alarm has been eliminated releases the alarm.

The alarm release terminals are pulled up to the internal circuit’s +5 V level by a resistor that is approximately 10 k. The maximum allowable voltage is 5 V. The logic threshold levels are CMOS.

Alarm status output

Photocoupler (P.C)

Maximum applied voltage: 30 V Maximum current: 8 mA

To monitor the alarm status externally, monitor the output signal across pins 20 and 22 of the J1 connector.

The signal is on when a protection function (OVP, OCP, OPP, OHP, REV, or UVP) is activated or when an external alarm is applied.

PLZ-4WL 93

Monitor Signal Output

500 Ω

Approx. 2 μs

Approx. 4.5 V

0 V

TRIG OUT

Front panel

CAUTION

Monitor output

H/L

Range

H/L M

Current

Full scale of the range

VH/L VM

I MON OUT connector (BNC)

1 V 0.1 V

Across pins 7 and 8 of the J1 connector

10 V 1 V

50 Ω

I MON OUT

Front panel

Trigger signal output

The trigger signal can be used as a synchronization signal for monitoring the waveform of the switching operation on an oscilloscope. It can also be used to synchronize with an external device during sequence execution.

The trigger signal is output from the TRIG OUT connector (BNC connector) on the PLZ-4WL front panel.

The trigger signal output voltage is approximately 4.5 V. The pulse width is 2 µs or more. The output impedance is approximately 500 . The TRIG OUT connector is connected to the chassis electric potential. It is isolated from A COM.

The trigger signal output is generated under the following conditions.

• During switching operation.

• When a step in which trigger output

has been specified is executed during sequence operation.

Current monitor output

The signal is output from the I MON OUT connector on the PLZ-4WL front panel and across pins 7 and 8 (pin 8 is common) of the J1 connector.

To avoid damaging the PLZ-4WL, observe the following precautions. Pin 8 of the J1 connector is connected the negative load input terminal. Make sure that the wire of pin 8 does not touch any of the other pins.

■ I MON OUT connector (BNC) on the PLZ-4WL front panel

The common is connected to the chassis electric potential. It is isolated from A COM. For current ranges H and L, 1 V corresponds to the full scale current; for current range M, 0.1 V corresponds to the full scale current. The output impedance is approximately 50 .

■ Across pins 7 and 8 of the J1 connector

94 PLZ-4WL

The common is connected to A COM. For current ranges H and L, 10 V corresponds to the full scale current; for current range M, 1 V corresponds to the full scale current.

Maintenance

This chapter describes the maintenance procedures including cleaning, inspection, and calibration.

Inspection

CAUTION

Fix the pin inside the louver into place.

To purchase accessories or options, contact your Kikusui agent or distributor.

Cleaning the dust filter

A dust filter is installed on the inside of the louver on the front panel. Periodically clean the filter to prevent clogging.

• A clogged filter hinders the cooling of the inside of the PLZ-4WL, can cause malfunctions, and can shorten the PLZ-4WL’s service life.

• When the PLZ-4WL is in operation, air is sucked through the dust filter to cool the inside of the device. If moisture is present in the dust filter, the temperature or humidity inside the PLZ-4WL increases and may cause malfunctions.

Use both hands to grab the four edges

of the louver.

Louver

Dust filter

Ta b

Slot

While pulling the bottom slat towards

you, slide the top of the louver down, and remove the louver from the panel.

Remove the dust filter from the inside

of the louver and clean it.

Use a vacuum cleaner to dispose of the dust and foreign particles that are attached to the dust filter. If the filter is extremely dirty, clean it using a water-diluted neutral detergent and dry it completely.

Attach the louver so that its tabs enter

the slots in the panel. While pushing on the second slat from the bottom of the louver, slide the louver up to attach it to the PLZ-4WL.

96 PLZ-4WL

Internal inspection

The PLZ-4WL’s electrolytic capacitor, fan motor, and backup-memory battery will wear out over time.

The exact timing varies depending on how the PLZ-4WL is used, but we recommend that you have the PLZ-4WL overhauled after about 10,000 hours of operation. An overhaul includes internal inspection and cleaning.To have the PLZ-4WL overhauled, please contact a Kikusui distributor or agent.

Backup battery replacement

The PLZ-4WL has a battery inside. The battery’s service life differs depending on the environment that the PLZ-4WL is used in, but three years after it is purchased is a rough estimate for the battery’s service life. If the panel settings are not retained after the power switch is turned off and on, the battery has worn out. For information about replacing the battery, contact your Kikusui agent or distributor.

Inspection

Maintenance

PLZ-4WL 97

Calibration

The PLZ-4WL is calibrated properly when it is shipped, but we recommend that you calibrate it regularly to keep it operating at top performance.

What gets calibrated?

The current and voltage values are calibrated.

The current values are calibrated for each of the three current ranges (L, M, and H).

The voltage values are calibrated for each of the two voltage ranges (4 V and 30 V).

The offset and gain values for all the ranges indicated above are calibrated.

Offset value: 10 % of the full scale value

Gain value: 100 % of the full scale value

During operation, the relationship between the current setting and the actual current and the relationship between the voltage setting and the actual voltage are linear. Therefore, a straight line is defined by the calibrated offset and gain values. During operation, the relationships between the current and voltage settings and the actual current and voltage values are determined by the calibrated straight line.

Reference

Range’s

F. S .

1/10F.S.

Ofst

Offset calibration

Gain

Gain calibration

Calibrated items

The following eight items are calibrated for the three voltage ranges and the two current ranges.

1. The offset value of the internal reference voltage for current settings.

2. The gain value of the internal reference voltage for current settings.

3. The offset value of the internal reference voltage for voltage settings.

4. The gain value of the internal reference voltage for voltage settings.

5. The offset value for measured values.

6. The gain value for measured values.

7. The offset value of the internal reference voltage for the protection function settings.

8. The gain value of the internal reference voltage for the protection function settings.

The offset values of the internal reference voltages for the settings and of the measured values are calibrated simultaneously. The same is true for the gain values.

When you press ENTER or NEXT (SHIFT+ ) in the gain calibration screen, the calibration data is written to the internal memory.

98 PLZ-4WL

Calibration

Regulated DC power supply

Voltmeter

(DVM)

Voltmeter

(DVM)

PLZ-4WL

Series

-S

Shunt resistor

–

■ Calibration numbers

The numbers that appear in the calibration screen are the calibration numbers.

Calibration

)

Calibration number

1. CC(Low

2. CC(Mid

3. CC(High

4. CV 4V

5. CV 30V

PREV NEXT

Alarm

If an alarm occurs during calibration, the PLZ-4WL produces an alarm sound, and the load turns off. After you remove the cause of the alarm and press ENTER, the alarm sound stops, and the PLZ-4WL returns to the Calibration screen.

Start calibration again from the calibration number at which the alarm occurred.

Preparation

Before you calibrate the PLZ-4WL, leave it on for 30 minutes or more to warm it up.Warming up reduces measurement error caused by initial drift. Keep the ambient temperature at 23 ± 5C.

Equipment used

Name Required Accuracy Required Rating

Measurement voltage

DC voltmeter Within 0.02 %

Shunt resistor 0.1 %

Regulated DC power supply

(constant-voltage power

supply)

Regulated DC power supply

(constant current power

supply)

1: PLZ164WL, 2: PLZ334WL

–

range:

0 V to 35 V

For 5 A

1,2

100 A2

For 0.5 A

For 1 A

For 10 A

For 50 A

For 100 A

Voltage: 5 V

Current: 50 A

Voltage: 35 V

Current: 0.5 A

Maintenance

Connect the equipment as shown below. Select an appropriate shunt resistor according to type of calibration that you are performing.

PLZ-4WL 99

CC Mode Calibration (Calibration numbers 1, 2, and 3)

Perform calibration on the Low, Mid, and then High range. For each item, start calibration at step A.

Current Range

Low 10 Step A – Step A – Step B –

Mid 10 Step A – Step A – Step B –

High 10 Step A – Step A – Step B –

■ CC mode settings

The current settings for each model are listed below.

Percentage of the Full Scale (%)

100 – Step C – Step C – Step D

Calibration Number and Item

1 CC (Low)

2 CC (Mid)

3 CC (High)

Internal reference voltage for current settings.

Offset Gain Offset Gain Offset Gain

Output Setting of

the Power Supply

Offset

Gain 500 mA ± 0.5 mA 1 A ± 1 mA

Offset 500 mA ± 0.5 mA 1 A ± 1 mA

Gain 5 A ± 0.005 A 10 A ± 0.01 A

Offset 5 A ± 0.005 A 10 A ± 0.01 A

Gain 50 A ± 0.05 A 100 A ± 0.1 A

Voltage:

3.3 V

Current:

Rated current of

the load device

Calibrated Items

Measured Values Internal Reference Voltage for

the Protection Function Settings

Current to Be Matched

PLZ164WL PLZ334WL

50 mA ± 0.05 mA 100 mA ± 0.1 mA

Calibrating the low range

■ Step A: Calibrate the offset values of the internal reference voltage for current settings and of the measured values.

Connect a shunt resistor that matches the value corresponding to 10 %

of the maximum low range value.

Press MENU (SHIFT+SET/VSET).

The menu screen appears.

Use to select “3. Calibration,” and then press ENTER.

Use and to select “1. CC(Low).”

Connect a constant-voltage power supply to the load input terminals,

and apply 3.3 V. Set the power supply current to approximately +2 % to 5 % of the load device’s rated current.

Press ENTER.

The load turns on automatically, and the offset calibration (CC (Low) Offset Adjustment) screen appears.

100 PLZ-4WL

Kikusui PLZ164WL, PLZ334WL User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

About PLZ-4WL Series Manual

Notations used in this manual

Product Overview

What Is an Electronic Load?

Contents

Search by Topic

Front Panel

Rear Panel

Installation and Preparation

Checking the Package Contents

Attachment to the rack adapter

Connecting the Power Cord

Turning the Power On

Turning the POWER switch on

When the PLZ-4WL does not start properly

Checking the version

Turning the POWER switch Off

Load wiring

Methods for Ensuring Stable Operation

Reducing the load wiring inductance

Optimizing the response speed

Do not apply excessive voltages to the load input terminals

Match the polarities of the load input terminals and the DUT terminals

Connecting to the Load Input Terminals

Remote Sensing

Basic Functions

Panel Operation Basics

Turning the Load On and Off

Turning the load on

Turning the load off

Operation Modes

Constant Current Mode (CC mode)

Configuring CC mode

Configuring CC+CV mode

Constant Resistance Mode (CR)

Configuring CR mode

Configuring CR+CV mode

Constant Voltage Mode (CV mode)

Configuring CV mode

Constant Power Mode (CP mode)

Configuring CP mode

Switching

Setting the switching level

Setting the switching interval

Turning the switching function on and off

Slew Rate

Setting procedure

Soft Start

Short

Turning the short function on and off

Locking the Keys

Switching from Remote Mode to Local Mode

Advanced Operations

Memory Types

ABC Preset Memory

Saving settings to ABC preset memory

Recalling ABC preset memory entries

Setup Memory

Saving settings to setup memory

Recalling setup memory entries

Protection Functions

Protection function types

Clearing alarms

Response Speed

Elapsed Time Display and Auto Load-Off Timer

Elapsed time display (Count Time)

Auto load-off timer (Cut Off Time)

Menu

Factory Default Settings (Initialization)

Sequences

Sequence Function

Normal sequences and fast sequences

Common Sequence Editing Operations

How Normal Sequences Work

Editing Programs in a Normal Sequence

Editing Steps in a Normal Sequence