Pressure/Vacuum                                                                NVLAP Logo

Bob Quinn completes an air velocity measurement       

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

Typical types of equipment the ORNLML performs pressure and vacuum calibrations on are: Pressure gauges and transducers, barometers, manometers, capacitance gauges and vacuum gauges.

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


Pressure – Absolute Mode

Range

Best Uncertainty (+/-) ppm of Reading + Pa *

Remarks Accredited

1.0 Pa to 15.0 kPa
0.0000145 psia to 2.17 psia

37 + 0.008

Force Balanced Piston Gauge Yes
       
10 kPa to 380 kPa
(1.45 to 55 psia)
16 + 0.10 Automated Piston Gauge Yes
       
50 kPa to 1900 kPa
(7.3 to 275 psia)
18 + 0.12 Automated Piston Gauge Yes
       
200 kPa to 7600 kPa
(29 to 1100 psia)
20 + 0.25 Automated Piston Gauge Yes
       
1.38 MPa to 49 MPa
(200 to 7107 psia)
44 + 142 Pneumatic Piston Gauge Yes
       
49 MPa to 110 MPa
(7107 to 16000 psia)
49 + 142 Pneumatic Piston Gauge Yes
       
5.1 MPa to 500 MPa
(740 to 72500 psia)
190 + 83 Hydraulic Piston Gauge No

 

Absolute Differential Mode

Range

Best Uncertainty (+/-) ppm of Reading + Pa *

Remarks Accredited

0 Pa to 15 kPa
(0 to 2.17 psia)

37 + 0.005

Force Balanced Piston Gauge Yes

Gauge Mode

Range

Best Uncertainty (+/-) ppm of Reading + Pa *

Remarks Accredited

0 Pa to 15.0 kPa
(0 to 2.17 psi)

37 + 0.005

Force Balanced Piston Gauge Yes
       
10 to 380 kPa
(1.45 to 55 psi)
16 + 0.010 Pa Automated Piston Gauge Yes
       
50 to 1900 kPa
(7.3 to 275 psi)
18 + 0.060 Pa Automated Piston Gauge Yes
       
200 to 7600 kPa
(29 to 1100 psi)
20 + 0.23 Pa Automated Piston Gauge Yes
       
1.38 MPa to 49 MPa
(200 to 7107 psia
44 + 25 Pneumatic Piston Gauge Yes
       
49 MPa to 110 MPa
(7107 to 16000 psia)
49 + 25 Pneumatic Piston Gauge Yes
       
5 MPa to 500 MPa
(725 to 72500 psia)
190 + 83 Hydraulic Piston Gauge No

Vacuum

Range

Best Uncertainty (+/-) % of Reading *

Remarks Accredited
1.0E-9 Torr to 5.0E-8 Torr 27 Stabil-lon Gauge No

 

 

   
5.0E-8 Torr to 1.0E-7 Torr 17 Stabil-lon Gauge No

 

 

   
1.0E-7 Torr to 5.0E-7 Torr 14 Stabil-lon Gauge Yes

 

 

   

5.0E-7 Torr to 1.0E-6 Torr

6.3 Stabil-lon Gauge Yes
       
1.0E-6 Torr to 1.0E-5 Torr 3.5 Stabil-lon Gauge Yes
       
1.0E-5 Torr to 1.0E-4 Torr 3 Stabil-lon Gauge Yes
       
5.0E-7 Torr to 7.5E-4 Torr 2.4 Spinning Rotor Gauge No

*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.

ORNL Public | Disclaimer | Comments