A highly stable and accurate mains or battery powered calibrator for applications requiring a precision voltage source of low internal resistance.
The 1010 DC voltage calibrator has five ranges up to 10V with a resolution up to 0.01μV. The compact and robust design make it easily portable and well suited to laboratory, field and industrial use. A carry case is available to house the instrument for transport or storage.
Voltage outputs are set by selecting the range switch and dialling up the desired value on the thumbwheel switch. Output polarity may be selected using the normal/off/reverse switch.
The calibrator’s output resistance is typically 500mΩ on the 10V, 1V and 0.1V ranges. The maximum output current that can be drawn on these ranges is limited to 25mA maintaining specification. The lower ranges have an output resistance of 1Ω and will supply current up to 30mA.
A precision zener diode is used as a reference source that provides an input to a F.E.T. chopper amplifier system operating in a feedback stabilised mode. The gain value is determined by a set of precision metal film resistors, selected by the 5-decade thumbwheel switch on the front panel. The output voltage is variable from 0.01µV to 9.9999V in 5 ranges.
For complete reliability, the calibrator range switch employs two contacts in parallel for each position in case one contact fails, ensuring the calibrator will still function correctly.
The 1010 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 40 hours typical use. The battery condition monitored by a meter on the front panel.
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Output
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0 to 9.9999V in 5 ranges:
0 to 9.9999V in 100µV steps
0 to 999.99mV in 10µV steps
0 to 99.999mV in 1µV steps
0 to 9.9999mV in 0.1µV steps
0 to 999.99µV in 0.01µV steps
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Accuracy
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10V and 1V ranges: ± 0.02% of setting + ± 0.005% of range.
100mV range: ± 0.05% of setting + ± 0.005% of range, ± 1µV.
10mV and 1mV ranges: ± 0.05% of setting + ± 0.005% of range, ± 4µV. |
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Output Resistance
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10V, 1V, and 100mV ranges = less than 0.1Ω (typically 0.05Ω). 10mV and 1mV ranges = 1Ω.
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Maximum Output Current
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10V, 1V and 100mV ranges = 25mA. 10mV and 1mV ranges = up to short circuit value 30mA, although it should be noted that loads of greater than 1kΩ will give greater than 0.1% error
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Output Voltage Stability
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Less than 30ppm per °C (0 to +50°C). Less than 5ppm per V variation in supply voltage. Less than 75ppm per year. Less than 10ppm per hour at constant temperature
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Output Polarity
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Positive or negative switch selected. A centre ‘off’ position is also provided.
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Output Noise Level
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10V, 1V, and 100mV ranges = less than 10ppm of setting ± 2µV (0 to 10Hz).
10mV and 1mV ranges = less than ± 0.05µV (0 to 10Hz)
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Reference Sources
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Precision zener diode selected after a special ageing process for a temperature coefficient better than 5ppm per °C and stability better than 10ppm per month, non cumulative.
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Maximum Overload
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The instrument can withstand continuous short circuit on the output for all ranges.
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Power Supply
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Time Electronics power unit type PU2 which is housed in the rear of the 1010. The PU2 will power the 1010 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.
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Battery Level Indicator
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A front panel display provides a continuous indication of the battery state.
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