In local operation it is helpful for certain applications to be able to switch rapidly between two load levels. For this purpose, we have built in a convenient setting toggling function in the PLI series, similar to that available in the ZS series.

To do this, you define 2 setting values (setting A and setting B), which can be toggled in the main screen by a simple keystroke. Both setting values can be varied in the main screen during runtime.

This setting is useful, for example, for manual recording of step responses in power supplies.

To use this function, firmware version 4.2.2 is required in the user interface module of the respective device. Please contact H&H Support if you want to update the firmware of your device.

Intelligent chargers often only start the charging process when they detect a suitable energy storage device at their output.

With the optional Charger Starter Interface (CST), the PLI series electronic load simulates a discharged accumulator by applying an appropriate voltage to the load input.

The Charger Starter Interface can be installed as an option in any PLI load with 60 V (PLI16-06) or 120 V (PLI16-12) voltage range. It works in principle like a programmable power supply.

To simulate a discharged accumulator with the electronic load, set the CST voltage to the voltage expected by the charger when the accumulator is discharged. The activation of the output voltage of the CST can be coupled with the switching of the load input, so that when the load input is switched on, the output voltage of the CST is applied to the load input for a certain time.

As soon as the charger supplies current, a previously programmed voltage list can be started in the load, simulating the battery voltage rising.

The measurement data for current and voltage can be recorded and stored in the electronic load and read after charging.

How to configure such a test procedure is described in our Application Note 15.

We discontinue production of electronic AC loads ZSAC series with effect from January 31, 2020.

For existing customers we will keep the possibility after the official discontinuation to procure spare devices for existing systems. The duration of this service will depend on material and component availability. Please contact us in this case.

The service for the above mentioned series will be provided as long as a purchase of spare parts is possible.

The discontinued ZSAC series will be replaced by the ACL series.

A contribution to environmental protection: We are currently converting the lighting of the entire company building in Konzell – from the administration to production to the stockroom – from fluorescent tubes to energy-saving LED tubes. The investment will already have amortized in about 2 years.

For the PLI series – as already known from the ZS series through the zero volt option – there is now a selection of zero volt models available. The Zero Volt models extend the operating range of the electronic load almost to short circuit (10 mV). This makes these devices particularly suitable for testing fuel cells, for example. In addition, we often adjust the setting and measuring range of the corresponding load to customer specifications. The ZV models can compensate voltage drops on the load lines up to approx. 0.5 V.

The following models are currently available or planned (subject to modifications and extensions). In terms of power, the devices can also be overloaded temporarily.