UHV Tech Services
774 Whittier Hwy, 03883, South Tamworth, NH, United States
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What this lab is accredited for
We found no published test standard numbers in this lab’s scope. The full scope as published is below.
Only this lab. Searches the method, matrix and range of each of the 3 scope lines.
A2LA certificate 4265.01 · 3 lines
| Line | Method | Matrix | Range |
|---|---|---|---|
| 1 | - | Helium Gas Leak; Test ComponentsShow page textExtracted from the scope document; tables may not line up. View scope for the original. (A2LA Cert. No. 4265.01) 10/23/2025 Page 1 of 2
SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017
UHV TECH SERVICES INC.
774 Whittier Hwy
South Tamworth, NH 03883
Lisa Crabtree Phone: 603 284 6306
CALIBRATION
Valid To: October 31, 2027 Certificate Number: 4265.01
In recognition of the successful co mpletion of the A2LA evaluation process (including an assessment of
the organization’s compliance with R205 – A2LA’s Calibration Program Requirements), accreditation is
granted to this laboratory to perform the following calibrations
1:
I. Fluid Quantities
Parameter/Equipment
Range
CMC
2, 3, 4 (±)
Comments
Leak Rate – Measuring
Equipment
Helium Gas Leak
Standards
(0.1 x 10
-8 to 1.0 x 10-5) mbar-l/s
6.5 %
Method: Helium leak
standard comparison
calibration using a
helium mass
spectrometer
Leak Test – Measure
Test Components
(> 0.1 to 5 x 10-12) mbar-l/s
(> 0.1 to 1 x 10
-7) mbar-l/s
6.6 %
6.6 %
Method: Test
component
connected to
helium mass
spectrometer under
vacuum
Method: Sniffer
attached to helium
mass spectrometer
______________________________
1 This laboratory offers commercial calibration services. | See scope document |
| 2 | Extracted from the scope document; tables may not line up. View scope for the original. (A2LA Cert. No. 4265.01) 10/23/2025 Page 2 of 2
2 Calibration and Measurement Capability Uncertainty (C MC) is the smallest uncertainty of measurement
that a laboratory can achieve within its scope of accreditation when performing more or less routine
calibrations of nearly ideal measurement standards or nearly ideal measuring equipment. CMCs represent
expanded uncertainties expressed at approximately the 95 % level of confidence, usually using a coverage
factor of k = 2. The actual measurement uncertainty of a specific calibration performed by the laboratory
may be greater than the CMC due to the behavior of the customer’s device and to influences from the
circumstances of the specific calibration.
3 In the statement of CMC, percentages are percentages of reading, unless otherwise indicated.
4 The type of instrument or material being calib rated is defined by the parameter. This indicates the
laboratory is capable of calibrating instruments that measure or generate the values in the ranges indicated
for the listed measurement parameter. | ||
| 3 | Extracted from the scope document; tables may not line up. View scope for the original. For the calibrations to which this accreditation applies, please refer to the laboratory’s Calibration Scope of Accreditation.
Accredited Laboratory
A2LA has accredited
UHV TECH SERVICES INC.
South Tamworth, NH
for technical competence in the field of
Calibration
This laboratory is accredited in accordance with the recognized International Standard ISO/IEC 17025:2017 General requirements
for the competence of testing and calibration laboratories. This laboratory also meets the requirements of R205 – Specific
Requirements: Calibration Laboratory Accreditation Program. This accreditation demonstrates technical competence for a
defined scope and the operation of a laboratory quality management system
(refer to joint ISO-ILAC-IAF Communiqué dated April 2017).
Presented this 23rd day of October 2025.
__ _____________________
Mr. Trace McInturff, Vice President, Accreditation Services
For the Accreditation Council
Certificate Number 4265.01
Valid to October 31, 2027 | ||
Ranges are reproduced from the accredited scope document as published, and only where we found that range printed in the document for the line. Otherwise the cell reads “See scope document”. An absent range means the register did not state one. Line numbers are ours, for cross-reference; they follow the order of the scope document.
Location
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