PLI Series - Powerful
Features of performance
- Input voltage up to 1,200 V
- Load current up to 2,700 A
- Power from 600 W to 28,800 W
- Temporary power overload capacity, depending on model
- Models with integrated zero-volt supply (ZV models)
- Models with several current setting and measuring ranges (MR models)
- High power density up to 2,100 W in 2 U (3,200 W in 3 U)
- Basic operating modes CC - CV - CR - CP
- Combined operating modes CC+CV, CR+CC+CV, CP+CC+CV, CV+CC
- Ethernet + USB + RS-232 + CAN as standard
- GPIB optional
- Intuitive operation
- Quick operation by shortcuts
- Setting toggling
- Constant current, voltage, resistance and power mode
- MPP Tracking
- Digital Master-Slave operation
- Energy storage test
- Ri measurement
- Dynamic load with synchronous DAQ
- Trigger model
- SCPI programming with measurement
- USB MSD as measurement data memory
- Adjustable protections for overcurrent and undervoltage
- Analog monitoring outputs for voltage and current
- Analog control input
- Digital input and programmable control output
- Silent fan cooling
- Settings saving
- Electronic protection
- Bilingual help system (German and English)
- 2 free calibrations (with device registration)
DescriptionAll-rounders from H&H: the PLI series. With a huge model range, many standard functions, locally operated via the intuitive user interface or remotely via one of the many standard interfaces. Programming is done in SCPI syntax with a high command volume.
Zero-Volt Models - PLIxxxxZVSpecial applications, such as fuel cell tests, need to load the DUT down to almost 0 V. For these purposes we supply a range of models with an integrated zero-volt supply. When I/O port signals are to be used, the GND of the I/O port must be galvanically isolated from the negative load input. Therefore we recommend to install the optional galvanically isolated I/O port (option PLI06) at these models.
Multi-Range Models - PLIxxxxMRA model variant with 3 or 4 "real" current ranges allows the setting and measurement of current, power and resistance over a wide range of values with high resolution and accuracy. Especially solar and PV applications have high requirements at this point. The ranges are graduated with factor 10 each.
Operating Modes and Functions
Basic and Combined Operating ModesThe devices have the operating modes constant current (CC), constant voltage (CV), constant resistance (CR) and constant power (CP). Furthermore, protection values for undervoltage and overcurrent can be set in each operating mode. This results in the combined operating modes CC+CV, CR+CC+CV, CP+CC+CV, CV+CC.
Dynamic Load with List FunctionDynamic operation (LIST function) can be configured by up to 300 list point settings. The electronic load saves the synchronously acquired measurement data with timestamp.
Data AcquisitionAn automatic data acquisition function allows to store measurement data internal or directly on an external USB flash drive.
Energy Storage Test/Discharge FunctionThe discharge function discharges energy storage devices such as accumulators, batteries, ultracaps etc. in a controlled manner under definable switch-off conditions. The values determined in the process, such as charge and energy, can be read locally and via a data interface.
Internal Resistance MeasurementThe electronic load can measure the DC internal resistance of the connected test object. For this purpose it uses a calculation method which is specified in various standards, e.g. DIN EN 61951, DIN EN 61960.
Watchdog FunctionIf the watchdog function is activated, the load input is switched off in case of faulty communication with the control PC in order to protect the connected DUT.
MPP Tracking (option PLI21)The Maximum Power Point Tracking (MPPT) function is used to test solar or photovoltaic modules. For this purpose the maximum power point (MPP) of the connected DUT is controlled in CV mode.
Trigger ModelA configurable trigger model controls data acquisition, static and dynamic settings.
Loading CapacityThe model range covers power classes from 600 W, up to 28,000 W continuous power rating. In addition the models up to 300 V have an overload capability. The height and duration of the possible overload depends on the temperature of the power stage. The unit indicates the currently possible overload. Therefore the units can be used even for considerably more powerful applications.
- Current limitation
- Power limitation
- Overtemperature protection
- Protection of the GND lines at the Analog I/O Port
Data InterfacesThe following data interfaces are included as standard:
- GPIB (option PLI02)
Analog I/O PortThe standard analog I/O port provides the following functions:
- Load setting C and V
- Analog setting of C and V protections
- Load on-off
- Operationg mode selection
- Voltage monitor output
- Current monitor output
- Trigger input
- Trigger output
- Digital input
- Programmable control output
Galvanically Isolated Analog I/O PortFor the galvanic isolation between the Analog I/O Port and the load terminals the PLI06 option can be installed. Isolation voltage is 800 V. Using this board also prevents ground loops.
Help SystemA help system for most menu items is integrated in the user interface. The help system's language can be set to German or English.
CalibrationA free Factory Calibration Certificate (FCC) is supplied with the devices. The calibration process is subject to supervision in accordance with DIN EN ISO 9001. The calibration certificate documents the traceability to national standards to illustrate the physical device in accordance with the international System of Units (SI). Within the 2-year warranty period, we will calibrate a second time free of charge if the respective device (serial number) will have been registrated at H&H.
--> Conditions for a second free calibrationFor use under laboratory conditions, H&H recommends a calibration interval of 2 years. This is an empirical value that can be used as a guide for the first period of use. Depending on the intended use, service life, relevance of the application and ambient conditions, the operator should adjust this interval accordingly.
DocumentationWe supply a user manual as pdf file and printed General Safety Instructions, each in German and English.
Software tool to control PLI loads with firmware revision up from AI3.7 DI3.3 UI3.4 (PLI-MR devices are currently not supported)
Software tool (old revision) to control PLI loads with firmware revision from AI2.7 DI2.7 UI2.7 to AI2.9 DI2.9 UI2.9
Software tool (old revision) to control PLI loads with firmware revision from AI2.6 DI2.5 UI2.5 to AI2.6 DI2.6 UI2.6