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Precautions about the Installation
Location
You must observe the following precautions when installing
the product.
• Do not use the product in a flammable atmosphere.
To prevent the possibility of explosion or fire, do not use the
product near alcohol, thinner, or other combustible
materials, or in an atmosphere containing such vapors.
• Avoid locations where the product is exposed to high
temperature or direct sunlight.
Do not install the product near a heater or in areas subject
to drastic temperature changes.
For this product's operating and storage temperatures, see
the specifications.
• Avoid humid environments.
Do not install the product in high-humidity locations such as
near a boiler, humidifier, or water supply.
For this product's operating and storage humidity, see the
specifications.
Condensation may form even within the operating humidity
range. If this happens, do not use the product until the
condensation dries up completely.
• Be sure to use it indoors.
This product is designed for safe indoor use.
• Do not install the product in a corrosive atmosphere.
Do not install the product in a corrosive atmosphere or in
environments containing sulfuric acid mist, etc. This may
cause corrosion of various conductors or reduce the quality
of the connector contacts inside the product, and this could
lead to malfunction, failure, and possibly fire.
• Do not install the product in a dusty location.
Dust accumulation can lead to electric shock or fire.
• Do not use the unit where ventilation is poor.
The unit employs a forced air cooling system. Air is taken in
from air inlet located on panels other than the rear panel
and exhausted from the air outlet on the rear panel. Secure
adequate space around the unit to prevent the possibility of
fire caused by accumulation of heat.
Allow at least 20 cm of space between the air inlet/outlet
and the wall (or obstacles).
Hot air (approximately 20 °C
temperature) is exhausted from the air outlet. Do not place
objects that are affected by heat near the air outlet.
• Do not place objects on top of the product.
Placing heavy objects on top of the product may cause
malfunction.
• Do not install the product vertically.
It may cause injury to the operator or damage to the product
when it falls down.
• Do not install the product on an inclined surface or in a
location subject to vibrations.
The product may fall or tip over and cause damage and
injury.
• Do not use the product in a location subject to strong
magnetic or electric fields or in a location where the input
power supply signal contains large amounts of distortion or
noise.
Doing so may cause the product to malfunction.
• Do not use the unit near highly sensitive measuring
instruments or transceivers.
The noise generated by the unit may affect them.
• Secure adequate space around the power plug.
Do not insert the power plug to an outlet where accessibility
to the plug is poor. And, do not place objects near the outlet
that would result in poor accessibility to the plug.
PLZ-4WH
higher than the ambient
Product Overview
The PLZ-4WH Series Electronic Load is a multifunctional
system designed to offer the highest levels of reliability and
safety. The electronic load contains a stable and high-
performance current-control circuit that enables high-speed
load simulations. In addition, its CPU control feature works to
improve operability and multifunctional capability.
The high-precision current settings provide you with sufficient
resolution.
Because the 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-4WH Series Models
Model
M a x i m u m
Operating Current
PLZ164WH
8.25 A
PLZ334WH
16.5 A
PLZ1004WH
50 A
1
100 A
PLZ4004WHB
1.
PLZ2004WB is a dedicated option for PLZ1004WH.
Features
In addition to the high-performance constant-current, constant-
resistance, constant-voltage, and constant-power modes, the PLZ-
4WH Series Electronic Load offers a wide variety of other features.
High-speed slew rate
The rise and fall slew rate of the current when the PLZ-4WH
switches at 2 % to 100 % (20 % to 100 % in M range) of the rated
current in constant current mode is 0.8 A/µs (PLZ1004WH), which
corresponds to fast rise and fall times of 50 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.
In constant current mode, the PLZ-4WH 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. (0.003 mA resolution is possible in
the L range of the PLZ164WH.)
Operability
The PLZ-4WH 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.
O p e r a t i n g
Power
Voltage
5 V to 650 V
165 W
5 V to 650 V
330 W
5 V to 650 V
1000 W
5 V to 650 V
2000 W
5
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