Triple-output power supply from TTi

For example, a 2 m length of a 24/0.2 wire pair has a resistance of around 0.1 ohm. For a 5 V load drawing 3 A, the metering error would be 0.3 V and the effective full current load regulation would be around 6%, against a quoted figure of perhaps 0.01% for the power supply itself.

The EL302RT has two independent and isolated outputs of 0 to 30 V at 0 to 2 A. Separate 4-digit meters are provided for voltage and current on each main output to a resolution of 10 mV and 1 mA.

Linear regulation provides low output noise and excellent transient response. The outputs can operate in constant-voltage or constant-current mode with automatic crossover.

The third output is intended primarily for low-voltage logic and is variable between 1.5 V and 5.0 V with a fixed current limit of 2 A. The voltage can be accurately preset using the voltage meter from the second output.

The EL302RT incorporates safety binding-post output terminals that can accept a 4 mm safety plug with rigid insulating sleeve, a requirement specified by an increasing number of laboratories for safety reasons. However, unlike the 4 mm safety sockets used on some other products, the new TTi terminals can also accept fork connectors or bare wires, giving maximum connection flexibility.

The power supply is highly compact, measuring 260 mm wide x 160 mm high x 295 mm deep (10.2 x 6.3 x 11.6 inches). Cooling is done by convection, which ensures that the unit is entirely silent in operation.