The Constant Current Power Supply is a special power supply that holds constant current in the load. If the resistance changes, the voltage changes automatically to hold the current constant.
A large meter is provided to monitor the load and it can be switched from mA to then monitor the output voltage. Digital meter.
Max current is 30 mA and maximum voltage available to maintain 30 mA in the load is 30V.DC.
Genuine IEC product.
Instruction Sheet available.