Time Electronics

1021 Milliamp Source with Null Indicator

Time Electronics Ltd, Unit 5, TON Business Park, 2-8 Morley Road, Tonbridge, Kent, TN9 1RA, United Kingdom

T: +44 (0) 1732 355993 | F: +44 (0) 1732 350198 | mail@timeelectronics.co.uk | www.timeelectronics.com

v2b

07/22

Due to continuous development Time Electronics reserves the right to change specifications without prior notice.

Technical Specifications

Output.......................................................... 0 to 99.99 mA in 3 ranges.

...................................................................... 0 to 99.99 mA in 10 μA steps.

...................................................................... 0 to 9.999 mA in 1 μA steps.

...................................................................... 0 to 999.9 μA in 0.1 μA steps.

Accuracy ..................................................... ± (0.02 % of setting + 0.02 % of range + 0.2 μA).

Voltage capacity ......................................... Adjustable between 14 and 40 V. Maximum output power 2.4 W.

Voltage limit indicator ................................ Provides indication of insufficient drive voltage.

Output polarity............................................ Positive or negative switch selected.

...................................................................... A centre ‘off’ position provides an open circuit on the output terminals.

Output stability ........................................... Better than 60 ppm per °C (–10 °C to + 50 °C). Better than 25 ppm/hr (at constant temperature).

Output noise ............................................... Less than 15 ppm of full scale.

Load regulation........................................... Better than 20 ppm per volt change in output.

Null sensitivity............................................. Adjustable from ± 20 mA to ± 20 μA FSD via front panel control. Maximum resolution is 1 μA.

Power supply .............................................. NiMH rechargeable batteries with external mains recharger.

General Specifications

Dimensions ................................................. 200 x 75 x 110 mm (215 x 100 x 120 mm including protective cover).

Weight.......................................................... 1 kg (1.4 kg including protective cover).

Optional extras ........................................... Carry case.

...................................................................... Calibration certificates - traceable (factory) or accredited (ISO 17025).

Country of origin......................................... UK.

Ordering Information

1021........................................................... DC Current Source with Null Meter

................................................................... (mains charger and protective cover included)

9027.............................................................. Carry Case

C153............................................................. Traceable calibration certificate (Factory)

C105............................................................. Accredited calibration certificate (ISO 17025)

Applications

Resistance and Temperature Measurement

Low ohm and contact resistance of relays, switches, connectors, etc

can be easily measured using the 1021 as the current source in a

4-terminal kelvin system where lead and probe resistance do not affect

the accuracy of the reading. This method can also be used in

thermometry for calibration and measurement of platinum-resistance

thermometers and thermistors.

Transducers

The ability to source and measure current makes the 1021 ideal for

testing and calibration of many types of current transducer and their

associated measuring equipment.

Semiconductor Parameters

The 1021 covers many applications in a wide variety of semiconductor

measurements including; forward voltage drops, zener diode

characteristics and temperature coefficients, transistor gains (hfe) and

saturation voltages. Characteristic curves of devices can be easily

plotted by selecting suitable output currents on the 1021. It can also be

used to drive Hall effect devices.