Kikusui PLZ-U Series User manual

Part No. ZI-(X)2-982, IB004851
Feb. 2004
OPERATION MANUAL
ELECTRONIC LOAD PLZ-U Series
PLZ 70UA
PLZ 150U
PLZ -30F
PLZ -50F

Use of Operation Manual
Please read through and understand this Operation Manual before operating the product. After reading,
always keep the manual nearby so that you may refer to it as needed. When moving the product to another
location, be sure to bring the manual as well.
If you find any incorrectly arranged or missing pages in this manual, they will be replaced. If the manual it
gets lost or soiled, anew copy can be provided for afee. In either case, please contact Kikusui distributor/
agent, and provide the “Kikusui Part No." given on the cover.
This manual has been prepared with the utmost care; however, if you have any questions, or note any
errors or omissions, please contact Kikusui distiibutor/agent.
Reproduction and reprinting of this operation manual, whole or partially, without our permission is prohib-
ited.
Both unit specifications and manual contents are subject to change without notice.
Copyright© 2004 Kikusui Electronics Corporation
Printed in Japan.

Power Requirements of this Product
Power requirements of this product have been changed and the relevant sections of the Operation
Manual should be revised accordingly.
(Revision should be applied to items indicated by acheck mark [71.)
Input voltage
The input voltage of this product is VAC,
and the voltage range is to VAC. Use the product within this range only.
Input fuse
The rating of this product’s input fuse is A, VAC, and .
^WARNING To avoid etectrical shock, always disconnect the power cord or turn off
the switch on the switchboard before attempting to check or replace the
fuse.
Use a fuse element having ashape, rating, and characteristics suitable
for this product. The use of afuse with adifferent rating or one that short
circuits the fuse holder may result in fire, electric shock, or irreparable
damage.
Power cord
The product is provided with power cords described below. If the cord has no power plug,
attach apower plug or crimp-style terminals to the cord in accordance with the wire colors
specified in the drawing.
^WARNING The attachment of apower plug or crimp-style terminals must be carried
out by qualified personnel.
Without apower plug
Blue (NEUTRAL)
Green/Yeliow (GND)
\
—Without apower plug
White (NEUTRAL)
IGreen or Green/Yellow (GND) j
Provided by Kikusul distributor/agent
Kikusul agents can provide you with suitable power cord.
For further information, contact Kikusul distributor/agent.
!^
PLZ-U

ASafety Symbols
For the safe use and safe maintenance of this product, the following
symbols are used throughout this manual and on the product. Under-
stand the meanings of the symbols and observe the instructions they
indicate (the choice of symbols used depends on the products).
^OR AIndicates that ahigh voltage (over 1000 V) is used here. Touch-
ing the part causes apossibly fata! electric shock. If physical
contact is required by your work, start work only after you make
sure that no voltage is output here.
DANGER Indicates an imminently hazardous situation which, If ignored,
will result in death or serious injury.
^WARNING
A
Indicates apotentially hazardous situation which, if ignored,
could result in death or serious injury.
Indicates apotentially hazardous situation which, if ignored, may
result in damage to the product and other property.
Is placed before the sign "DANGER,” “WARNING,” or “CAU-
TION” to emphasize these. When this symbol is marked on the
product, see the relevant sections in this manual.
1Safety Symbols PLZ-U

ASafety Precautions
The following safety precautions must be observed to avoid fire hazard,
electrical shock, accidents, and other failures. Keep them in mind and
make sure that all of them are observed properly.
Users
•This product must be used only by qualified personnel who understand the con-
tents of this operation manual.
•If it is handled by disqualified personnel, persona! injury may result. Be sure to han-
dle it under supervision of qualified personnel (those who have electrical knowl-
edge.)
•This product is not designed or manufactured for general home or consumer use.
Purposes of use
•Do not use the product for purposes other than those described in the operation
manual.
Input power
•Use the product with the specified input power voltage.
•For applying power, use the power cord provided. Note tiiat the provided power
cord is not use with some products that can switch among different input power
voltages or use 100 Vand 200 Vwithout switching between them. In such acase,
use an appropriate power cord.
Fuse
•With products with afuse holder on the exterior surface, the fuse can be replaced
with anew one. When replacing afuse, use the one which has appropriate shape,
ratings, and specifications.
Cover
•There are parts inside the product which may cause physical hazards. Do not
remove the external cover.
PL2-U Safety Precautions HI

Installation
•When installing products be sure to observe 2.2, “Precautions Concerning Instal-
lation Location” described in this manual.
•To avoid electrical shock, connect the protective ground terminal to electrical
ground (safety ground).
•When connecting the power cord to aswitchboard, be sure work Is performed by
aqualified and licensed electrician or is conducted under the direction of such a
person.
«When installing products with casters, be sure to lock the casters.
Relocation
•Turn off the power switch and then disconnect all cables when relocating the
product.
*Use two or more persons when relocating the product which weights more than
20 kg. The weight of the products can be found on the rear panel of the product
and/or in this operation manual.
*Use extra precautions such as using more people when relocating into or out of
present locations including inclines or steps. Also handle carefully when relocat-
ing tall products as they can fail over easily.
•Be sure the operation manual be included when the product is relocated.
Operation
•Check that the AC input voltage setting and the fuse rating are satisfied and that
there is no abnormality on the surface of the power cord. Be sure to unplug the
power cord or stop applying power before checking.
•If any abnormality or failure is detected in the products, stop using it immediately.
Unplug the power cord or disconnect the power cord from the switchboard. Be
careful not to allow the product to be used before it is completely repaired.
•For output wiring or load cables, use connection cables with larger current capac-
ity.
•Do not disassemble or modify the product. If it must be modified, contact Kikusul
distributor/agent.
Maintenance and checking
•To avoid electrical shock, be absolutely sure to unplug the power cord or stop
applying power before performing maintenance or checking.
•Do not remove the cover when performing maintenance or checking.
•To maintain performance and safe operation of the product, it is recommended
that periodic maintenance, checking, cleaning, and calibration be performed.
Service
•Internal service is to be done by Kikusui service engineers. If the product must be
adjusted or repaired, contact Kikusui distributor/agent.
VSafety Precautions PLZ-U

For the safe use of equipment, IEC60664 (Insulation coordination for equipment
within low-voltage systems) classifies circuits into four categories by an occurrence
level of transient voltage. When you connect equipment to apower line or connect a
measuring instrument to these places, make sure of the applied overvoltage cate-
gory. This instrument is designed to operate from the overvoltage category II.
Overvoltage category I
Equipment of overvoltage category Iis equipment for connection to circuits in
which measures are taken to limit transient overvoltages to an appropriately low
level.
Examples are protected electronic circuits.
Overvoltage category II
Equipment of overvoltage category II is energy-consuming equipment to be sup-
plied from the fixed installation.
Examples of such equipment are appliances, portable tools and other household and
similar loads.
If such equipment is subjected to special requirements with regard to reliability and
availability, overvoltage category III applies.
Overvoltage category III
Equipment of overvoltage category III is equipment in fixed installations and for
cases where the reliability and the availability of the equipment is subject to special
requirements.
Examples of such equipment are switches in the fixed installation and equipment for
industrial use with permanent connection to the fixed installation.
Overvoltage category IV
Equipment of overvoltage IV is for use at the origin of the installation.
Example of such equipment are electricity meters and primary overcurrent protec-
tion equipment.
PLZ-U Overvoltage Category V

This Operation Manual is made up of the following sections.
Chapter 1General Description
This chapter gives an overview and describes the features of the PLZ-U.
Chapter 2Installation and Preparation
This chapter describes the procedures of unpacking and preparation before using the
PLZ-U.
Chapter 3Names and Functions of Parts
This chapter describes the names and functions of parts on the front and rear panels
of the frame and load unit.
Chapter 4Basic Operation
This chapter describes the operating procedure of each operation mode and other
basic functions.
Chapter 5Application Operation
This chapter describes functions such as ABC preset memories, switching function,
and sequence function that are used in actual applications.
Chapter 6Remote Control
This chapter describes the procedure for connecting the interface and the procedure
for transmitting commands to the PLZ-U using SCPI commands.
Chapter? Maintenance
This chapter explains the PLZ-U maintenance.
Chapter 8Specifications
This chapter lists the electrical and mechanical specifications of the PLZ-U.
Appendix
The appendices cover the operating area of the PLZ-U, the basic operation modes,
sequence program creation table, SCPI command reference, and error messages.
V! Arrangement of this manual PLZ-U

Contents
Power Requirements of this Product I
Safety Symbols li
Safety Precautions 111
Overvoltage Category V
Arrangement of this Manual VI
Chapter 1General Description ^
1.1 About This Manual 1-2
1.2 Product Overview -1-2
1.3 Features 1-3
1.4 Options 1-5
Chapter 2Installation and Preparation ^
2. 1Checking the Package Contents 2-2
2.1.1 Frame -2-2
2.1.2 Load Unit 2-3
2.2 Precautions Concerning Installation Location 2-4
2.3 Precautions When Moving the PLZ-U 2-5
2.4 Installing Load Units 2-6
2.5 Connecting the Power Cord 2-8
2.6 Grounding (Earth) '2-9
2.7 Power Up ,2-10
2.8 Load Wiring 2-12
2.8.1 Precautions Concerning Wiring 2-12
2.8.2 Connection to the Load Input Terminal on the Rear Panel 2-15
2.8.3 Connection to the Load Input Terminal on the Front Panel 2-17
Chapter 3Names and Functions of Parts 3-1
3.1 Front Panel 3-2
3.1.1 Frame 3-2
3.1.2 Load Unit (Channel) 3-8
3.2 Rear Panel -3-11
Chapter 4Basic Operation ^
4.1 Panel Control Basics -4-2
4.2 Load On/Off -4-3
4.3 Basic Operation --4-5
4.4 Protection Functions and Alarms 4-7
4.4. 1Protection Function 4-7
4.4.2 Alarms 4-8
4.4.3 Setting the Trip Points 4-10
PLZ-U Contents VII

Chapter 5Application Operation 5-1
5.1 Soft Start Function -5-2
5.2 ABC Preset Memories 5-3
5.3 Switching Function 5-5
5.4 Setting the Slew Rate 5-7
5.5 Elapsed Time Display and Auto Load Off Timer 5-8
5.6 Sequence Function 5-9
5.6. 1Editing the Sequence 5-9
5.6.2 Executing the Sequence 5-1
1
5.6.3 Example Sequence 5-13
5.7 Remote Sensing Function -5-15
5.8 Key Lock Function 5-16
5.9 Configuration Settings 5-17
5.10 External Control 5-21
5.10.1 FRAME CONT Connector - - -5-21
5.10.2 CH CONT Connector 5-25
5.11 Parallel Operation 5-28
5.12 Setup Memories 5-30
5.13 Factory Default Settings 5-31
5.13.1 Factory Default Settings (General) 5-32
5. 13.2 Factory Default Settings of ABC Preset Memories -5-33
5.13.3 Factory Default Settings of Setup Memories 5-33
Chapter 6Remote Control 6-1
6. 1Overview 6-2
6.2 Instrument Interface Standard 6-2
6.3 Using SCPI Commands 6-3
6.3.1 Hierarchy of SCPI Commands -6-3
6.3.2 Parameter Format 6-6
6.4 Interface Setup 6-10
6.4.1 GPIB Control ---6-10
6.4.2 RS-232C Control - - -6-11
6.5 SCPI Commands 6-13
6.5.1 IEEE 488.2 Common Commands 6-13
6.5.2 Channel Commands -6-17
6.5.3 Measurement Commands —6-18
6.5.4 Configuration and Operation Commands 6-19
6.5.5 Trigger Commands -6-24
6.5.6 Switching Function Commands 6-26
6.5.7 Input State Commands —-6-27
6.6 Status Registers 6-33
6.6. 1SCPI Registers 6-33
6.6.2 IEEE488.2 Registers 6-50
VIII Contents PLZ-U

Chapter 7Maintenance 7-1
7.1 Maintenance 7-2
7.1.1 Cleaning the Panels 7-2
7. 1.2 Cleaning the Dust Filter 7-2
7. 1.3 Inspecting the Power Cord 7-3
7.1.4 Internal Inspection -7-3
7.2 Malfunctions and Causes lA
Chapter 8Specifications 8-1
8.1 Electrical Specifications 8-2
8.2 Dimensions —8-8
Appendix A-1
A. 1Operating Area of the PLZ-U A-1
A.2 Basic Operation Modes A-2
A.2.1 Operation of the CC Mode A-2
A.2. 2Operation of the CR Mode A-4
A.2.3 Operation of the CV Mode A-6
A.2.4 Operation of the CC+CV Mode A-8
A.2.5Operation of the CR+CV Mode A- 10
A.3 Operating Area of Each Model -A-13
A.3.1 Operating Area of the PLZ150U A-13
A.3.2 Operating Area of the PLZ70UA ‘A-14
A.4 Sequence Program Creation Table A- 15
A.5 SCPI Command Reference A- 16
A.6Error Messages A-23
A.6. 1Overview -A-23
A.6.2 AList of Errors A~23
Index I-
1
PLZ-U Contents IX

Chapter 1General Description
This chapter gives an overview and describes the features of the PLZ-U.
PLZ-U General Description 1-1

1.1 About This Manual
This operation manual covers the following PLZ-U Series Eiaitronic Load Units.
Frame
•PLZ-50F
•PLZ-30F
Load unit
•PLZ150U
•PLZ70UA
Product version covered
This operation manual covers products with frame ROM version l.OX and load unit
ROM version l.OX.
When contacting us about the product, please provide us the following information.
Model
ROM version
Manufacturing number (indicated at the lower section on the rear panel on the
frame and on the top panel on the load unit)
For the procedure of confirming the ROM version, see section 2.7, “Power Up.”
1.2 Product Overview
The PLZ-U Series Electronic Load Unit is acompact, high-performance, multi-
channel electronic load unit that has three operation modes: constant current, con-
stant resistance, and constant voltage.
The PLZ-U consists of aframe and load units. Load units are inserted into the frame
(control section) for operation. The PLZ-30F and PLZ-50F Frames can accommo-
date up to 3 channels and 5channels of load units, respectively.
The current capacity or power capacity can be increased through aparallel opera-
tion of load units. The load units can be combined to produce apower capacity from
75 Wto 750 W(when five PLZ150Us are installed into the PLZ-50F).
In addition to high-speed response and highly precise preset resolution, various
functions are provided including the soft start function, variable slew rates, switch-
ing function, ABC preset memories, four setup memories, and sequence function.
Because the PLZ-U comes standard with GPIB and RS-232C communication func-
tions, it can easily be incorporated into various test and inspection systems. The
communication functions are useful for testing batteries, DC/DC converters,
switching power supplies, and multi-output power supplies.
1-2 General Description PLZ-U

1.3 Features
In addition to the advanced constant current, constant resistance, and constant volt-
age functions, the PLZ-U Series Electronic Load Unit offers wide variety of other
features.
Compact and light
Compact and light weighing only approximately 1 1 kg and 17 kg for 3 channels and
5channels, respectively.
High-speed response
In constant current mode, acurrent rise and fall slew rate of 2.4 A/ps (PLZ150U) is
possible (converts to arise and fall time of 10 ias). Simulations that closely resemble
areal load are possible by using the PLZ-U as a load for DC power transient
response tests and as adummy load
High precision and high resolution
Three ranges are built into the PLZ-U achieving both wide dynamic range and high
resolution. The PLZ-U provides displays with up to 5digits for voltage, current, and
power measurement functions as well as minimum preset resolutions of 10 pA
(PLZ70UA) and 20 uA (PLZ150U).
Variable slew rate
The current slew rate can be varied continuously in constant current mode and con-
stant resistance mode. This feature allows the suppression of transient voltage drops
due to the wiring inductance that occurs when aload is switched and transient volt-
ages of constant voltage power supplies, etc.
Multi channels
Up to five and three channels can be installed into the PLZ-50F and PLZ-30F, respec-
tively. Each channel is isolated and can be used indej^ndently or linked with each
other. Different units (PLZ150Us and PLZTOUAs) can be installed in the frame.
Low noise
High reliability and low noise have been achieved by the adoption of a heat sensing
variable speed fan and the enhanced cooling structure.
Large capacity
Parallel operation is possible on up to five adjacent load units of the same type.
Five PLZ70UAS installed in PLZ-50F operating in parallel produce 375 W.
Five PLZlSOUs installed in PLZ-50F operating in parallel produce 750 W.
0Vtype
The PLZ70UA is a0Vinput operating voltage unit. This feature is amust for single
cell tests of fuel cells. Moreover, the operating voltage of semiconductor devices is
decreasing more and more due to the reduction of the power consumption and min-
iaturization of the semiconductor process. The PLZ70UA can be used to evaluate
the power supplies for these types of applications.
PLZ-U General Description 1-3

ABC preset memories
Three presets that are most frequently used can be stored for each operation mode
and range. This allows quick switching of settings even when the load is turned on.
Load simulations
In constant current and constant resistance modes, asequence program can be cre-
ated with up to 255 steps at aminimum interval of 1ms. Independent settings can
be entered on each channel simultaneously.
Outstanding operability
Setup operations have been consolidated on the frame panel. Each channel can be
configured with one hand while viewing the measured voltage and current. Rotary
knobs with an analog feel and simple interface make the operation of the PLZ-U
easy even for first-time users.
Load input terminal
The load input terminal is provided on both the front panel and rear panel making
the load unit suitable for embedded applications.
Remote sensing terminal
Remote sensing terminals are provided on both the front panel and rear panel allow-
ing more accurate characteristics tests.
Extensive protection functions
Equipped with overcurrent protection (OCP), overpower protection (OPP), over-
voltage protection (OVP), undervoltage protection (UVP), overheat protection
(OHP), and reverse connection protection (RVP) functions. Since OCP, OPP, and
UVP can be varied for each channel, protection can be optimized for each equip-
ment under test.
External control
External voltage reference can be applied and the load can be turned on/off on each
channel. You can recall channel-linked ABC preset memories, recall setup memo-
ries, and turn on/off the load from the frame control connector.
Inter-frame control
By connecting the frame control signal, multiple frames can be controlled from a
single frame. You can collectively turn on/off the load and recall reset values.
Setup memories
Four sets of panel settings can be stored. You can easily recall settings according to
the application and perform tests.
Standard GPIB, and RS-232C communication functions
GPIB and RS-232C come standard. Since panel settings, input voltage, current, and
power can be read through the interface, the PLZ-U can be embedded easily into
various test systems.
1-4 General Description PLZ-U

1.4 Options
Rack mounting option
The following rack mounting options are available.
For details, contact your Kikusui agent or distributor.
Table 1-1 Rack mounting options
Name Model Applicable Model Note
Rack mount bracket KRB3-PLZ-50F PT y.-iJAF Inch rack ElA standard
(Fig. 1-1) KRB150-PLZ-50F Milli rackJIS standard
Rack mount bracket KRB3-PLZ-30F PT 7.%(\V Inch rack EIA standard
(Fig. 1-2) KRB150-PLZ-30F Milli rack .IIS standard
Fig. 1-1 Rack mount bracket (PL2-50F)
Unit: mm
PLZ-U Generai Description 1-5

Control fiat cables
Control cables that connect frames for inter-frame control. The following two types
of cables are available.
Model Cord Length Application
PC01-PLZ-4W 84540 300 mm Connection between frames
PC02-PLZ-4W 84550 550 mm
PLZ-U
1-6 General Description

Chapter 2Installation and
Preparation
This chapter describes the procedures of unpacking and preparation before using
the PLZ-U.
PLZ-U Installation and Preparation 2-1

2.1 Checking the Package Contents
When you receive the product, check that all accessories indicated below 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 dis-
tributor.
INC^ •It is recommended that all packing materials be saved, in case the product needs
to be transported at alater date.
2.1.1 Frame
EjPower cord (1 pc.)
The power cord that is
provided varies depending on
the destination for the product
at the factory-shipment.
PLZ-30F (2 pcs. maximum)
PLZ-50F (4 pcs. maximum)
[Pl-000-406]
P1^30F (2 pcs. maximum)
PLZ-50F (4 pcs. maximum)
[Pl-000-405]
Blank panel (rear) Blank panel (front)
[Attached to the product.]* [Attached to the product.]*
*In products that have load units installed, blank panels are installed in the empty slots.
In products that contain the frame alone, the maximum number of blank panels are installed.
FRAME CONT protection dummy plug (2 pcs.)
[Attached to the product.]
Fig. 2-1 Accessories (frame)
[Zl-002-982]
Operation manual (this manual, Ipc.)
2-2 Installation and Preparation PLZ-U