versatile precision for Standards Laboratory measurements 2 ◆ Configurable for DCV, ACV, DCI, ACI and Ohms measurement ◆ Dual inter-compared ‘Selfcal’ references for enhanced confidence levels — stability better than 3 ppm/year over a ±5°C temperature range ◆ 8 1 / 2 -digit DCV and Ohms, 6 1 / 2 -digit ACV, 100% over-ranging ◆ 10 G Ω input impedance (up to 20 V DC) and 10 nV input sensitivity ◆ Special Ohms functions for ultra-high accuracy resistance measurements ◆ Range-to-range and function-to-function ratio measurements ◆ Simultaneous display of voltage and frequency