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Bob Quinn completes an air velocity measurement        Bob Quinn performs a mass flow calibration

ORNL Metrology Laboratory (ORNLML) maintains a variety of electrical standards traceable to SI through the National Institute of Standards and Technology (NIST) and other international primary laboratories. These standards generate and measure various electrical properties required to perform traceable calibrations of our customers’ instruments and equipment. ORNLML can provide accredited calibrations for any electrical parameter within the ranges detailed in our Scope of Accreditation. However, traceable non-accredited calibrations are available for electrical parameters outside of our Scope of Accreditation. The tables below list our accredited capabilities. Our entire Scope of Accreditation includes complete details of our accredited capabilities.

Typical types of equipment the ORNLML performs electrical calibrations on are: oscilloscopes, multimeters from hand held 3.5 digit to laboratory 8.5 digit models, clamp type ammeters, resistors both fixed and decade, frequency counters and insulation testers.

If you have questions about our electrical capabilities, please contact the ORNL Metrology Laboratory for more information.

ORNL Metrology Laboratory Accredited Electrical Capabilities

AC Current

Range in A

Best Uncertainty (+/-) in ANote 1
Frequency in Hz

Remarks Accredited

 

10

20

40

1k

5k

10k

 

 

0.00022

1.2 E-06

1.2 E-06

5.8 E-07

3.15 E-07

4.2 E-07

4.2 E-07

Source/Measure

Yes

0.0022

1.2 E-05

1.2 E-05

5.8 E-06

3.0 E-06

4.2 E-06

4.2 E-06

Source/Measure

Yes

0.022

1.2 E-04

1.2 E-04

5.8 E-05

3.0 E-05

4.1 E-05

4.1 E-05

Source/Measure

Yes

0.22

1.2 E-03

1.2 E-03

6.0 E-04

4.6 E-04

9.4 E-04

9.4 E-04

Source/Measure

Yes

2.2

 

1.2 E-03

1.4 E-03

1.4 E-03

9.4 E-03

9.4 E-03

Source/Measure

Yes

11

 

 

2.9 E-02

3.0 E-02

3.6 E-02

3.7 E-02

Source/Measure

Yes

2 Wire Resistance


Range in Ω

Best Uncertainty (+/-) in Ω Note 1

Remarks Accredited

0

2.9 E-01

Source/Measure

Yes

1

2.9 E-01

Source/Measure

Yes

1.9

2.9 E-01

Source/Measure

Yes

10

2.9 E-01

Source/Measure

Yes

19

2.9 E-01

Source/Measure

Yes

100

2.9 E-01

Source/Measure

Yes

190

2.9 E-01

Source/Measure

Yes

1 k

3.0 E-01

Source/Measure

Yes

1.9 k

3.2 E-01

Source/Measure

Yes

10 k

4.2 E-01

Source/Measure

Yes

19 k

5.9 E-01

Source/Measure

Yes

100 k

1.6E +00

Source/Measure

Yes

190 k

6.0 E +00

Source/Measure

Yes

1 M

2.3 E + 01

Source/Measure

Yes

1.9 M

2.3 E +02

Source/Measure

Yes

10 M

7.3 E +02

Source/Measure

Yes

19 M

1.2 E + 04

Source/Measure

Yes

100 M

5.9 E + 04

Source/Measure

Yes

 

4 Wire Resistance


Range in Ω

Best Uncertainty (+/-) in Ω Note 1

Remarks Accredited

0

6.6 E-05

Source/Measure

Yes

1

9.6 E-05

Source/Measure

Yes

1.9

1.4 E-04

Source/Measure

Yes

10

2.7 E-04

Source/Measure

Yes

19

9.4 E-04

Source/Measure

Yes

100

2.1 E-03

Source/Measure

Yes

190

3.1 E-03

Source/Measure

Yes

1 k

1.3 E-02

Source/Measure

Yes

1.9 k

3.1 E-02

Source/Measure

Yes

10 k

1.3 E-01

Source/Measure

Yes

19 k

3.0 E-01

Source/Measure

Yes

100 k

1.4 E +00

Source/Measure

Yes

190 k

5.8 E +00

Source/Measure

Yes

1 M

2.3 E + 01

Source/Measure

Yes

1.9 M

2.3 E +02

Source/Measure

Yes

10 M

7.3 E +02

Source/Measure

Yes

19 M

1.2 E + 04

Source/Measure

Yes

DC Voltage (Calibrators/Multimeters)


Range in V

Best Uncertainty (+/-) in V Note 1

Remarks Accredited

0

6.0uV/V + 5.2E-07V

Source/Measure

Yes

0.22

6.0uV/V + 5.2E-07V

Source/Measure

Yes

2.2

3.5uV/V + 1.5E-06V

Source/Measure

Yes

11

2.5uV/V + 4.1E-06V

Source/Measure

Yes

22

2.5uV/V + 1.1E-05V

Source/Measure

Yes

220

3.5uV/V + 2.7E-04V

Source/Measure

Yes

1100

4.5uV/V + 9.5E-04V

Source/Measure

Yes

 

DC Voltage Fixed Points


Range in V

Best Uncertainty (+/-) in V Note 1

Remarks Accredited

0.1

1.2 E-06

Source/Measure

Yes

1

3.7 E-06

Source/Measure

Yes

10

2.5 E-05

Source/Measure

Yes

100

3.3 E-04

Source/Measure

Yes

1000

4.2 E-04

Source/Measure

Yes

Programmable Josephson Voltage Standard


Range in V

Best Uncertainty (+/-) in V Note 1

Remarks Accredited

-10 to +10

0.29nV/V + 123nV

Source/Measure

Yes

DC Current


Range in A

Best Uncertainty (+/-) in A Note 1

Remarks Accredited

0

3.5 E-09

Source/Measure

Yes

0.00022

1.4 E-08

Source/Measure

Yes

0.0022

1.1 E-07

Source/Measure

Yes

0.022

1.55 E-06

Source/Measure

Yes

0.22

3.8 E-05

Source/Measure

Yes

2.2

2.7 E-03

Source/Measure

Yes

11

4.9 E-03

Source/Measure

Yes

LF AC Voltage


Range

Best Uncertainty (+/-) in % + μVNote 1
Frequency in Hz

 

10 to 20

20 to 40

40 to 20k

20k to
50 k

50k to 100k

100k to 300k

300k to 500k

500k to 1 M

Accredited

2.2 mV

0.2 +4

0.2 +4

0.2 +4

0.8+ 4

1.7 + 5

1.7 +10

1.7+10

1.7 +20

Yes

22 mV

0.04 +4

0.03+4

0.05 +4

0.05 +4

0.1 +4

0.4 +5

1.2 +10

1.2 +20

Yes

220 mV

0.3+12

0.03+7

0.03 +7

0.05 +7

0.1+7

0.4+17

1.2 +20

1.2 +25

Yes

2.2 V

0.03+40

0.032 +15

0.032 +15

0.046 +8

0.104 +10

0.404 +30

1.213 +80

1.214 +200

Yes

22 V

0.048 +400

0.05 +150

0.05+150

0.052+50

0.2 +100

0.2 +200

1.8+600

1.8 +2000

Yes

 

Range

Best Uncertainty (+/-) in % + mVNote 1
Frequency in Hz

 

10 to 20

20 to 40

40 to 20k

20k to 50 k

50k to 100k

100k to 300k

300k to 500k

500k to 1 M

Accredited

220 V

0.07 +4

0.07 +1.5

0.07 +1.5

0.2+0.6

0.4 +1

0.4 +2.5

1.7 +16

1.8 +40

Yes

1100 V

0.057 +16

0.05 +4

0.05+3.5

 

 

 

 

 

Yes

 

Frequency Dissemination


Range in Hz

Best Uncertainty (+/-)  (Fractional Frequency Error) Note 1

Remarks Accredited

10 M

1.17 x 10-11

Source/Measure

Yes

Note 1 Represents an expanded uncertainty using a coverage factor, k=2, at an approximate level of confidence of 95%.

Any reference to "accredited" or "accreditation" refers to the National Voluntary Laboratory Accreditation Program (NVLAP) and applies to calibration services only as performed by the Oak Ridge National Laboratory's (ORNL) Metrology Laboratory (Lab Code 200159-0). Refer to the ORNL NVLAP scope of accreditation for details.

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