The Time Electronics 1077 is a multi-purpose handheld test instrument that can be used as an adjustable current load, adjustable power supply, or precision current source. It is commonly used for the testing and simulation of milliamp transducer systems, with a compact and rugged design and protective rubber cover for durability in both lab and field use.

As an adjustable current load (simulating the transducer), the 1077 draws up to 100mA from the line, with current set by front panel controls. As an adjustable power supply, it provides 14V to 40V with accurate measurement and display of current drawn. As a precision current source, it sources set current up to 100mA to the loop with 14V to 40V adjustable drive capacity.

Three current ranges are available: 0-99.99mA in 10μA steps, 0-9.999mA in 1μA steps, and 0-999.9μA in 0.1μA steps. Accuracy is 0.02%, and a 3.5 digit (1999 max) LCD displays line current. A 24V line mode is included for standard loop simulation.

The 1077 features safety terminals compatible with 4mm shrouded plugs, standard plugs, bare wires, and spade terminals. A battery level indicator is provided, and the unit is supplied with a protective cover. Applications include testing and calibration of transmitters, transducers, and process control loops.