Time-electronics 1021 DC Current Source User Manual

V1.4 14/12/10 Time Electronics Ltd Botany Industrial Estate, Tonbridge, Kent, TN9 1RH Tel: +44(0)1732 355993 Fax: +44(0)1732 770312 Email: mail@T

10 1021 Technical Manual 10 6. Maintenance and R epair 6.1. Maintenance Dismantling the Instrument Remove rubber protection boot and then removal of

11 1021 Technical Manual 11 7. R ecalibration The instrument is calibrated before it leaves the factory and should require no further adjustment for a

12 1021 Technical Manual 12 7.1. Calibration Procedure Access to the recalibration trimmers is by removing the instrument’s cover which is located by

13 1021 Technical Manual 13 7.2. Linearity The linearity of the output is determined by specially matched resistors mounted on the rear of the digit

14 1021 Technical Manual 14 8. Guarantee & S ervicing Guarantee Period This unit is guaranteed against defects in materials and workmanship for a

2 1021 Technical Manual 2 Contents 1. Introduction ...

3 1021 Technical Manual 3 1. Introduction 1.1. General Description • 100mA output with overload protection • 0.02% Accuracy • Wide range of appl

4 1021 Technical Manual 4 1.2. Specifications Output: 0-100mA in 3 ranges: (1) 0-99.99mA in 10uA steps (2) 0-9.999mA in 1uA

5 1021 Technical Manual 5 2. Controls 1 8 9 7 3 5 2 6 4 10 11 12

6 1021 Technical Manual 6 1. Output Terminals Output current is available on two front panel terminals which are suitable for either wire compression

7 1021 Technical Manual 7 3. Operation 3.1. Preliminaries The 1021 is supplied complete with rechargeable batteries (housed in the instrument) and a

8 1021 Technical Manual 8 4. E lectrical Noise Pick-Up In addition to the inherent electrical noise from internal circuitry of the instrument, the out

9 1021 Technical Manual 9 5. Circuit Des cription 5.1. Power Supply The power supply circuit board is mounted on a removable bracket which runs the