1024 DC Current Calibrator

Output

0 to 100 mA in 5 ranges:
0 to 99.999 mA in 1 μA steps
0 to 9.9999 mA in 100 nA steps
0 to 999.99 μA in 10 nA steps
0 to 99.999 μA in 1 nA steps
0 to 9.9999 μA in 0.1 nA steps

Accuracy

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

Voltage Capacity

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

Regulation

Load: better than 5 ppm per volt. Supply: better than 5 ppm 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 insufficient drive voltage.

Output Stability

Less than 30 ppm per °C (0°C to + 50 °C).
Less than 10 ppm per hour at constant temperature.
Less than 75 ppm per 6 months.

Output Noise

100 mA, 10 mA and 1 mA ranges: less than 5 ppm of full scale.
100 μA and 10 μA ranges: less than 10 ppm of full scale ± 0.1 nA.

Null Sensitivity

Adjustable from ± 25 mA to ± 25 μA FSD via front panel control. Maximum resolution is 0.5 μA.

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.