Color liquid crystal display (LCD)

High visibility color display. The voltage, current, power, current capacity (Ah) and power capacity (Wh) values are conveniently displayed.

Maximum slew rate of 60 A/μs

Achieving a rise time of 4 μs to reach the rated current of the electronic load. Power supply evaluation demands a fast transient response which the PLZ-5W series achieves with ease.

High speed voltage tracking characteristics

High speed voltage tracking characteristic in CR mode is perfect for applications such as startup tests for power supplies.

Operation modes

The following five operation modes are available on the PLZ-5W. These can be selected when the load is in the off state.

Adjustable slew rate

The speed of change can be set when the current is changed.The slew rate setting will function in the following instances.

• When the setting is changed to vary the current value (including the switching function).
• When the current value is changed using external control in constant current (CC) mode.
• When the current value is changed while the load is on.

The slew rate is set according to the current range as an amount of current change per unit of time. Moreover, a common value is set for the rise and fall speeds. In CC mode and ARB mode, the slew rate can be set regardless of whether the load is on or off.

High precision and high resolution

The built-in three-range configuration provides wide dynamic range and high precision.

Load on/off operation

The following load on/off settings are available in addition to standard operations that can be carefully adjusted to fit the needs of any test environment.

• Start with “load on” when power is turned on
• Display elapsed “load on” time
• Auto “load off” when time limit is reached
• Control “load on/off” with external controls such as relays

Arbitrary I-V characteristics (ARB) mode

In ARB mode arbitrary I-V characteristics can be set by entering multiple I-V points (voltage and current value set points). 3 to 100 points can be registered and the spaces between all points are automatically linearly interpolated. This mode can be used for the simulation of LED drivers and other DUT’s with non-linear characteristics.[P8]

Short function

When the short function is activated, the maximum current value will be set if in CC mode, and the minimum voltage value will be set if in CR mode. The relay contact (30 Vdc/1 A) of the EXT CONT connector closes, and the load imput terminals can then be shorted by driving an external high-current relay.

Switching function

Sequence function

Soft start function

The soft start feature controls the rise time of the load current. The soft start feature can be activated when the following conditions are met.

• The rise time of the soft start has been set.
• “Load on” while in CC Mode.
• Soft start input settings start from zero input and end equal to or above the minimum operating conditions.

This function can be used if the output of the DUT becomes unstable when the load current rises sharply, or when the operator wishes to delay the current change on startup to prevent the DUT’s overcurrent protection circuit from being activated.

Remote sensing function

With remote sensing, the voltage measurement point can be changed from the load input terminal to the DUT sensing point. By connecting the sensing leads to the DUT, the effects of voltage drops caused by resistance in the load cables can be reduced and the load current stabilized. To activate remote sensing, connect the sensing cables to the sensing terminals of the PLZ-5W at the DUT end, and enable the remote sensing function.* Possible remote sensing compensation voltage : approx. 7 V (Total potential difference between the input terminals and sensing terminals)

Auto load off timer

The auto load off timer automatically turns off the load after a specific amount of time elapses from the discharge of the DUT. The integrated power and current is measured immediately after the load is turned off, ideal for battery discharge tests.

Synchronized operation

The following synchronization features are available when simply connecting the PLZ-5W with other equipment using a communication cable.

• Synchronizing load on/off among multiple pieces of equipment
• Synchronizing measurements (remote control)
• Synchronizing the start time and resume time for sequences across multiple units

Different PLZ-5W models can be connected (Ex: PLZ205W and PLZ1205W). Synchronization is also available during parallel operation.

Setup memory

The setup memory can store up to 20 sets of the settings listed below.

• Operation mode
• Load settings (current, conductance, voltage, power)
• Current range setting
• Voltage range setting
• Slew rate
• Switching level (current value/conductance value, or percentage)
• Switching interval (frequency/time of one cycle and duty cycle/ operating time on the high side.)
• Alarm detection point
• Content of ABC preset memories

ABC preset memory

Three setting values can be stored in preset memory slots A, B, and C. The stored values can be recalled freely at any time even when the load is on. In CC+CV and CR+CV modes, constant current and constant voltage values, as well as constant resistance and constant voltage values can be recalled and saved, respectively.

Diverse protections, other functions

Overcurrent protection (OCP), Overpower protection (OPP), Overvoltage detection(OVP), Undervoltage protection (UVP), Overheat detection(OTP), Reverse-connection detection(REV), Alarm input detection, Configuration setting, USB Keyboard Compliant

Wide-ranging digital interface

LAN (LXI) / USB / RS232C as standard interface *GPIB Option