Soft Start
The soft start function allows the rise time of the current to be changed after the load-on operation in constant current mode. Since the rise time for the system can be changed according to the output-voltage rise time for the device being tested, you can conduct tests under highly realistic load conditions. (The soft start time can be selected from the following options – 0.1, 1, 3, 5, 10, 30, 100 and 300 ms.)

Remote sensing function
The remote sensing function compensates for voltage drops in load lines. It is used to set resistance and voltage values correctly and to make accurate voltage and power measurements. Particularly, the function improves the transitional characteristics in constant voltage and constant resistance modes, leading to stable operation.

ABC preset memories
Three memories A, B and C are provided for each range in constant current, constant resistance and constant voltage modes, and the set values can be saved. The stored set values can be called freely even while the load is on and saved again. In the constant current + constant voltage and constant resistance + constant voltage modes, the constant current and constant voltage memories and the constant resistance and constant voltage memories can be called and saved, respectively.

Ease of operation
All the knobs and keys necessary for the setting operations are provided on the frame panel. You can perform the setting operations by one hand while viewing the measured voltage and current values displayed on a channel-by-channel basis. The analog-like rotary knobs, which employ rotation speedsensitive encoders, and intuitive design make the system very easy to operate.

Key lock function
This function locks the panel keys so that the set values, memory data, sequences and other settings cannot be changed.

Numerous protection functions
The system features the following protection functions – over current protection (OCP), over power protection (OPP), overvoltage protection (OVP), under voltage protection (UVP), over heat protection (OHP) and reverse connection protection (RVP). Because the OCP, OPP and UVP values can be changed on a per-channel basis, you can optimize the protection settings for each device to be tested.

Setup Memory
Up to four of the set values listed below can be saved in the setup memories. The set values are called or saved for all the channels simultaneously.

• Operation mode (CC, CR and CV/+CV)
• Current, resistance and voltage values recorded when saved
• Range setting
• Slew rate
• Switching frequency, duty factor and level
• Soft start
• Configuration settings
• ABC preset memory data
• Auto load off timer
• Sequence

Configuration settings
This function configures the settings related to the system operation, communication environment, etc. These settings are stored in the system memory and called when the power is turned on.

• Number of parallel operated load modules
• Operation mode in which the external reference voltage input is used
• Over current protection (OCP) load off function
• Over power protection (OPP) load off function
• Load on delay time
• Load on/off operation at the end of the sequence
• Polarity of load on external control (low/high)
• Load on/off operation at powering on
• Choice between GPIB and RS-232C
• GPIB address setting
• RS-232C communication speed

External control
External controls are provided using the frame connector (FRAME CONT) and each channel connector (CH CONT). The frame connector (FRAME CONT) lets you perform the channel-synchronized load on/off, ABC preset memory call, setup memor y call, load status output and alarm status output operations. Also, using the channel c onnec tor (CH CO NT ), you can performthe external voltage reference control, load on/off and input current monitor output operations.

Support for GPIB and RS232C
The system comes standard with GPIB and RS232C interfaces. It also complies with the following standards:

• IEEE Std 488.2-1992 IEEE Standard Codes,Formats,Protocols, and Common Commands For Use With IEEE Std 488.1-1987
• IEEE Std 488.1-1987 IEEE Standard Digital Interface for Programmable Instrumentation
• TIA/EIA-232F
• Standard Commands for Programmable Instruments（ SCPI） version 1999.0