Pressure/Vacuum
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 our accredited capabilities. Our entire Scope of Accreditation can be found at the following link.
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.
Capability
Pressure –Absolute Mode (20/T05)
Range
|
Best Uncertainty (+/-) in ppm + mPa (psi) * |
Remarks |
1.0 Pa to 15.0 kPa |
37 + 8 |
Source/Measure |
0.0000145 psia to 2.17 psia |
37 + 1.2 E-6 |
Source/Measure |
Range |
Best Uncertainty (+/-) in ppm of Reading * |
Remarks |
13.8 kPa to 34.5 kPa |
98.3 |
Source/Measure |
2.0 psia to 5 psia |
98.3 |
Source/Measure |
|
|
|
34.5 kPa to 172.4 kPa |
43.2 |
Source/Measure |
5 psia to 25 psia |
43.2 |
Source/Measure |
|
|
|
82.7 kPa to 3447.4 kPa |
25.2 |
Source/Measure |
12 psia to 500 psia |
25.2 |
Source/Measure |
|
|
|
1665 kPa to 6894.8 kPa |
21.4 |
Source/Measure |
24 psia to 1000 psia |
21.4 |
Source/Measure |
Absolute Differential Mode
Range |
Best Uncertainty (+/-) in ppm + mPa (psi) * |
Remarks |
0 Pa to 15.0 kPa |
37 + 5 |
Source/Measure |
0 psia to 2.17 psia |
37 + 7.3 E-7 |
Source/Measure |
Gauge Mode
Range
|
Best Uncertainty (+/-) in ppm + mPa (psi) * |
Remarks |
0 Pa to 15.0 kPa |
37 + 5 |
Source/Measure |
0 psi to 2.17 psi |
37 + 7.3 E-7 |
Source/Measure |
Range |
Best Uncertainty (+/-) in ppm of Reading * |
Remarks |
5.5 kPa to 172.4 kPa |
19.3 |
Source/Measure |
0.8 psig to 25 psig |
19.3 |
Source/Measure |
|
|
|
82.7 kPa to 6894 kPa |
19.8 |
Source/Measure |
5 psig to 25 psig |
19.8 |
Source/Measure |
|
|
|
1.379 MPa to 68.948 MPa |
108 |
Source/Measure |
200 psig to 10000 psig |
108 |
Source/Measure |
|
|
|
1665 kPa to 6894.8 kPa |
21.4 |
Source/Measure |
24 psia to 1000 psia |
21.4 |
Source/Measure |
*Represents an expanded uncertainty using a coverage factor, k=2, at an approximate level of confidence of 95%. |
