Time Electronics 1024 Specifications

Time Electronics

1024 DC Current Calibrator

• 0 to 100mA in 5 ranges

• Accuracy 0.02%

• 10ppm/hr stability

• 30ppm/°C temperature coefficient

• Up to 15V output drive

• Battery or mains operation

• 12 hours typical use between charges

• Battery level indicator

SOFTWARE

DESCRIPTION

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,

eld, or industrial use. It incorporates many of the well-proven circuit techniques of the Time Electronics

type 1010 DC Voltage Calibrator.

• Optional carry case

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 amplier system.

Precision metal lm resistors with temperature coefcients 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 specied current levels.

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1024 Specifications

TECHNICAL SPECIFICATION

Output ................................................. 0 to 100mA in 5 ranges

............................................................. 0 to 99.999mA in 1µA steps

............................................................. 0 to 9.9999mA in 100nA steps

............................................................. 0 to 999.99µA in 10nA steps

............................................................. 0 to 99.999µA in 1nA steps

............................................................. 0 to 9.9999µA in 0.1nA steps

Accuracy ............................................. ± 0.02% of setting + ± 0.005% of range + ± 0.2nA

Voltage Capacity ................................. 15V with new batteries or mains power (11V with minimum allowable battery volts).

Regulation ........................................... Load: better than 5ppm per volt. Supply: better than 5ppm per volt.

Output Polarity .................................... Positive or negative switch selected. A centre ‘off’ position provides an open circuit on the

............................................................. output terminals.

Out of Limit Warning ........................... A front panel LED indicator provides warning of insufcient drive voltage.

Output Stability ................................... Less than 30ppm per °C (0°C to + 50°C)

............................................................. Less than 10ppm per hour at constant temperature.

............................................................. Less than 75ppm per 6 months.

Output Noise ....................................... 100mA, 10mA and 1mA ranges: less than 5ppm of full scale.

............................................................. 100µA and 10µA ranges: less than 10ppm of full scale ± 0.1nA.

Null Sensitivity ..................................... Adjustable from ± 25mA to ± 25µA FSD via front panel control.

............................................................. Maximum resolution is 0.5µA.

Power Supply ...................................... Time Electronics power unit type PU2 which is housed in the rear of the 1024. The PU2 will

............................................................. power the 1024 direct from the mains or an internal rechargeable battery. The battery is

............................................................. automatically charged when mains power is connected. Access to the power supply is from

............................................................. the back of instrument.

Battery Level Indicator ........................ A front panel display provides a continuous indication of the battery state.

GENERAL SPECIFICATION

Dimensions ......................................... W217 x H160 x D193mm

Weight ................................................. 3.3kg

Optional Extras .................................... Carry Case

............................................................. Calibration Certicates – traceable to NPL and UKAS

Country of Origin ................................. UK

ORDERING INFORMATION

1024 .................................................... DC Current Calibrator with null measuring facility

9021..................................................... Carry Case

C154 .................................................... Factory (NPL Traceable) Calibration Certicate

C106 .................................................... UKAS Calibration Certicate (ISO 17025)

Due to continuous development Time Electronics reserves

the right to change specifications without prior notice.

Time Electronics Ltd, Unit 11 Sovereign Way, Botany Industrial Estate, Tonbridge, Kent, TN9 1RH. United Kingdom.

T: [phone] F: [phone] E: [e-mail]

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