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Measured Quantity
Instrument or Gauge

 Range Best Measurement
Capability Expressed
as an Expanded
Uncertainty (k=2)
DC VOLTAGE    
Generation

Up to 200 mV
200 mV to 2 V
2 V to 20 V
20 V to 200 V
200 V to 1000 V

7.4 ppm + 0.3 μV
2.2 ppm + 0.2 μV
1 ppm + 4.6 μV
3.4 ppm
8.5 ppm

DC CURRENT    
Generation
20 μA to 200 μA
200 μA to 2 mA
2 mA to 20 mA
20 mA to 200 mA
200 mA to 2 A
2 A to 10 A 		29 ppm + 1.5 nA
11 ppm + 1.9 nA
19 ppm + 79 nA
15 ppm + 0.97 μA
26 ppm + 21 μA
88 ppm + 0.51 mA
Fixed point Current have Accredited uncertainties eg 10 A
 43 ppm
DC RESISTANCE 1 Ω, 10 Ω, 25 Ω, 100 Ω:
1kΩ:
10 kΩ:
10 μΩ to 1 Ω Current Carrying:
1 Ω to 1 TΩ Minimal Power: 		± 0.35 ppm
± 0.77 ppm
± 0.65 ppm
± 6.5 nΩ to 62 ppm
± 15 ppm to 0.72%
AC RESISTANCE 2.5 Ω, 25 Ω, 50 Ω, 75 Ω, 100 Ω, 400 Ω,
1 kΩ @ 75 Hz :
10 Ω to 1 kΩ at 75 Hz:
500 μΩ to 10 Ω shunts 40 Hz to 135 Hz:
± 3 ppm,
± 4.7 ppm
± 280 ppm to 0.07%
For full Accreditation details on all electrical parameters see www.ukas.org