Time Electronics 1024 Overview

A precision DC current source for calibration and test applications from nanoamp levels to 100mA.

The 1024 is a solid state battery powered instrument which is easily portable and convenient for laboratory, field, or industrial use. It incorporates many of the well-proven circuit techniques of the Time Electronics Type 1010 DC Voltage Calibrator.

The null balance system enables the 1024 to be used for making accurate current measurement in addition to its basic function as a calibrator. Operation is by backing the current source output against the current to be measured, with the difference being displayed on a sensitive centre zone null meter. At the null point, there is no voltage drop across the 1024.

The 1024 employs a precision aged reference diode as a basic reference source. Excellent zero stability is ensured by the use of a high performance FET chopper amplifier system. Precision metal film resistors with temperature coefficients of less than 10ppm per °C are used to maintain the accuracy and stability of the initial calibration.

The 1024 can be powered from mains supply or by the internal rechargeable battery pack. When the calibrator is plugged into the mains supply the internal batteries will automatically start to recharge. If unplugged from the mains during operation the internal batteries will continue to power the instrument. Full charge allows 12 hours typical use. The battery condition monitored by a meter on the front panel.

Safety Terminals
Fitted as standard and fully compatible with 4mm shrouded plugs, as well as standard plugs, bare wires, and spade terminals.

Applications
Applications include calibration and testing of current sensitive transducers; calibration and linearity tests on digital and electronic current meters; and semiconductor parameter measurements, for example diode conduction voltages at specified current levels.

The 1024 is a precision test instrument ideal for current calibration and measurement applications. As part of the Time Electronics portable test equipment range it is robust, high accuracy, and simple operation.

Features:

• 0 to 100mA output in 5 ranges
• 0.02% accuracy
• 10ppm/hr stability
• Up to 15V output drive
• Null measuring facility
• Safety terminals
• Battery or mains operation

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