InstroTek

(A2LA Cert. No. 6369.01) Revised 6/15/2026 Page 5 of 5 V. Time & Frequency _________________ 1 This laboratory offers commercial and field calibration services. 2 Calibration and Measurement Capability Uncertainty (CMC) 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 Field calibration service is available for this calibration. Please note the actual measurement uncertainties achievable on a customer's site can normally be expected to be larger than the Calibration and Measurement Capability Uncertainty (CMC) found on the A2LA Scope. Allowance must be made for aspects such as the environment at the place of calibration and for other possible adverse effects such as those caused by transportation of the calibration equipment. The usual allowance for the uncertainty introduced by the item being calibrated, (e.g. resolution) must also be considered and this, on its own, could result in the actual measurement uncertainty achievable on a customer’s site being larger than the CMC. 4 This scope meets A2LA’s P112 Flexible Scope Policy. 5 The locations of the laboratories that can perform the calibration are given by a three-letter code with valid to dates given in the table below: Location Code Valid to Dates 1 Triangle Drive, Research Triangle Park, NC 27709 RDU 5/31/2027 4495 44 th Street SE, Suite A, Grand Rapids, MI 49512 GRR 5/31/2027 5052 Commercial Circle, Suite A & B, Concord, CA 94520 SFO 7/31/2028 850 E 73 rd Avenue, Unit 12, Denver, CO 80229 DEN 7/31/2028 3580 Progress Drive, Unit O, Bensalem, PA 19020 PHL 5/31/2027 6 In the statement of CMC, Wt is the representation of weight pounds or grams appropriate to the uncertainty statement. 7 The type of instrument or material being calibrated 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. 8 “Troxler” is a trademark registered to Troxler Electronic Laboratories, Inc. Please click here to return to page 1 Parameter/Equipment Range CMC2 (±) Comments Location5 Timers & Stopwatch3 (0.5 to 30) min 0.11 s 1025 Traceable stopwatch RDU RPM3 (10 to 24 000) rpm 0.21 rpm Extech tachometer RDU