Certificate of Accreditation

PERRY JOHNSON LABORATORY ACCREDITATION, INC. Certificate of Accreditation Perry Johnson Laboratory Accreditation, Inc. has assessed the Laboratory of: Torreón, Coahuila, México C.P. 27019 (Hereinafter called the Organization) and hereby declares that Organization is accredited in accordance with the recognized International Standard: ISO/IEC 17025:2005 This accreditation demonstrates technical competence for a defined scope and the operation of a laboratory quality management system (as outlined by the joint ISO-ILAC-IAF Communiqué dated January 2009): Dimensional, Mass, Force and Weighing Devices, Mechanical and Electrical Calibration (As detailed in the supplement) Accreditation claims for such testing and/or calibration services shall only be made from addresses referenced within this certificate. This Accreditation is granted subject to the system rules governing the Accreditation referred to above, and the Organization hereby covenants with the Accreditation body s duty to observe and comply with the said rules. For PJLA: Initial Accreditation Date: Issue Date: Expiration Date: June 19, 2012 October 28, 2016 December 31, 2018 Tracy Szerszen President/Operations Manager Perry Johnson Laboratory Accreditation, Inc. (PJLA) 755 W. Big Beaver, Suite 1325 Troy, Michigan 48084 Revision Date: Accreditation No.: Certificate No.: August 17, 2017 72789 L16-368-R1 The validity of this certificate is maintained through ongoing assessments based on a continuous accreditation cycle. The validity of this certificate should be confirmed through the PJLA website: www.pjlabs.com Page 1 of 9

Torreón, Coahuila, México C.P. 27019 Dimensional Calipers F 1 mm to 450 mm (5.99 + 2.68 x 10-2 L) µm Block Gages 0 Micrometers F 1 mm to 450 mm (9.83 x 10-1 + 1.67 x 10-2 L) µm Mitutoyo Height Gages F 1 mm to 450 mm (5.99 + 2.68 x 10-2 L) µm Indicators F 1 mm to 25 mm (5.78 + 0.8L) µm Measurement Tapes F Rules 1 000 mm to 30 000 mm 5 mm to 2 000 m 1.1 mm 0.076 mm Master Rule Mitutoyo Mod 183-304 (Resolution of 0.5 mm) Error of Indication F Fixtures & Gages F X= 1 mm to 700 mm 2.8 µm CMM Mitutoyo Y= 1 mm to 1 000 mm Z= 1 mm to 600 mm Fixtures & Gages F X= 1 mm to 3 000 mm Y= 1 mm to 3 000 mm Z= 1 mm to 3 000 mm 0.043 mm Faro Arm Mass, Force and Weighing Devices Balance O Precision Balances O Scales O 4 mg to 200 g (Res.= 1 mg) 1 g to 17 000 g (Res.= 0.001 g) 1 g to 10 000 g (Res.= 0.001 g) 0.1 g to 6 000 g (Res.= 0.001 g) 1 mg to 17 000 g (Res.= 1 mg) 100 g to 20 000 g (Res.= 1 mg) 10 kg to 100 kg (Res.= 0.5 g) 1 kg to 1 000 kg (Res.= 0.1 g) 1 kg to 10 000 kg (Res.= 1 kg) 20 kg to 40 kg (Res.= 0.001 kg) 1.2 mg Weight Set F1 1.3 x 10-3 g Weight Set F1 OIML R-76 2.1 x 10-3 g Weight F2 OIML R-76 1.3 x 10-3 g Weight set E2 OIML R-76 1.3 x 10-3 g Weight Set F1 OIML R-76 0.12 g Weight Set F1 OIML R-76 0.56 g 130 g 1.2 kg 1.1 g Weight Set M1 OIML R-76 Issue: 10/2016 This supplement is in conjunction with certificate #L16-368-R1 Page 2 of 9

Mass, Force and Weighing Devices Scales O Weights F2, M1, M2, M3 F DEVICE SIZE AS 40 kg to 100 kg 2.3 g Weight Set M1 OIML R-76 (Res.= 0.002 kg) 100 kg to 200 kg 5.5 g (Res.= 0.005 kg) 200 kg to 400 kg 10 g (Res.= 0.01 kg) 400 kg to 500 kg 21g (Res.= 0.02 kg) 500 kg to 1 000 kg 130g (Res.= 0.05 kg) 1 000 kg to 1 500 kg 130 g (Res.= 0.1 kg) 1 500 kg to 2 000 kg 140 g (Res.= 0.2 kg) 2 000 kg to 2 500 kg 200 g (Res.= 0.2 kg) 2 500 kg to 4 000 kg 210 g (Res.= 0.2 kg) 4 000 kg to 5 000 kg 230 g (Res.= 0.2 kg) 5 000 kg to 10 000 kg 1.2 kg (Res.= 1.0 kg) 10 000 kg to 20 000 kg 1.2 kg Weight Set M2 OIML R-76 (Res.= 1.0 kg) 20 000 kg to 40 000 kg 1.8 kg (Res.= 2 kg 40 000 kg to 50 000 kg 2.5 kg (Res.= 4.0 kg) 50 000 kg to 75 000 kg (Res.= 4.6 kg 2.9 kg 1g 0.2 mg Weight Set F1 OIML R76 2 g 0.2 mg 5 g 0.2 mg 10 g 0.35 mg 20 g 0.4 mg 50 g 0.65 mg 100 g 1 mg 200 g 1.2 mg Issue: 10/2016 This supplement is in conjunction with certificate #L16-368-R1 Page 3 of 9

Mass, Force and Weighing Devices DEVICE SIZE AS Weights F2, M1, M2, 500 g 3.5 mg Weight F1, M3 F 1 000 g 6.5 mg OIML R-111 2 000 g 10 mg 5 000 g 13 mg 10 000 g 20 mg Weights M1, M2, M3 F 20 000 g 160 mg Weight F2 F 10 kg 100 mg Force Machines Tension and Compression FO Force Measurement Instrument Tension and Compression FO Force Measurement Instruments Tension and Compression F Mechanical 9.8 N to 960.6 N 10 % of reading Load Cell PT400 220 lbs. Type S, ISO-7500-1 49.03 N to 3.336 N 12 % of reading Load Cell PT400 750 lbs. Type S ISO-7500-1 9.8 N to 960.6 N 0.06 % of reading Class M1 weight NMX-CH- 49.03 N to 3.336 N 0.06 % of reading 376-IMNC Pressure Gages FO 3 Psi to 30 Psi 0.58 Psi Druck Model DPI 603 30 Psi to 300 Psi 0.6 Psi Vacuum Meters FO -10 Psi to 3 Psi 0.58 Psi Differential Pressure FO 0.357 inh 2O to 20 inh 2O 0.2 H 2O (88.92 Pa to 4 981 Pa) (50 Pa) Pressure Transmitter FO 3 Psi to 30 Psi 0.58 Psi 30 Psi to 300 Psi 0.6 Psi Electrical RTD Pt 385, 100 Ω FO -200 ºC to -80 ºC 0.05 ºC Electrical Simulation of -80 ºC to 0 ºC 0.05 ºC RTD Fluke 754/ Fluke 741B 0 ºC to 100 ºC 0.07 ºC Issue: 10/2016 This supplement is in conjunction with certificate #L16-368-R1 Page 4 of 9

Electrical RTD Pt 385, 100Ω FO RTD Pt 3926, 100Ω FO RTD Pt 3916, 100Ω FO RTD Pt 385, 200Ω FO RTD Pt 385, 500Ω FO 100 ºC to 300 ºC 0.09 ºC Electrical Simulation of 300 ºC to 400 ºC 0.1 ºC RTD Output 400 ºC to 630 ºC 0.12 ºC 630 ºC to 800 ºC 0.23 ºC -200 ºC to -80 ºC 0.05 ºC -80 ºC to 0 ºC 0.05 ºC 0 ºC to 100 ºC 0.07 ºC 100 ºC to 300 ºC 0.09 ºC 300 ºC to 400 ºC 0.1 ºC 400 ºC to 630 ºC 0.12 ºC -200ºC to -190 ºC 0.25 ºC -190 ºC to -80 ºC 0.04 ºC -80 ºC to 0 ºC 0.05 ºC 0 ºC to 100 ºC 0.06 ºC 100 ºC to 260 ºC 0.07 ºC 260 ºC to 300 ºC 0.08 ºC 300 ºC to 400 ºC 0.09 ºC 400 ºC to 600 ºC 0.1 ºC 600 ºC to 630 ºC 0.23 ºC -200 ºC to -80 ºC 0.04 ºC -80 ºC to 0 ºC 0.04 ºC 0 ºC to 100 ºC 0.04 ºC 100 ºC to 260 ºC 0.05 ºC 260 ºC to 300 ºC 0.12 ºC 300 ºC to 400 ºC 0.13 ºC 400 ºC to 600 ºC 0.14 ºC 600 ºC to 630 ºC 0.16 ºC -200 ºC to -80 ºC 0.04 ºC -80 ºC to 0 ºC 0.05 ºC 0 ºC to 100 ºC 0.05 ºC 100 ºC to 260 ºC 0.06 ºC Issue: 10/2016 This supplement is in conjunction with certificate #L16-368-R1 Page 5 of 9

Electrical RTD Pt 385, 500Ω FO RTD Pt 385, 1 000Ω FO Equipment to Measure DC Voltage FO Equipment to Measure DC Current FO Equipment to Output DC Voltage FO Equipment to Output DC Current FO Thermocouple Type B FO Thermocouple Type C FO Thermocouple Type E FO Certificate of Accreditation: Supplement 260 ºC to 300 ºC 0.08 ºC Electrical Simulation of 300 ºC to 400 ºC 0.08 ºC RTD Output 400 ºC to 600 ºC 0.09 ºC 600 ºC to 630 ºC 0.11 ºC -200 ºC to -80 ºC 0.03 ºC -80 ºC to 0 ºC 0.03 ºC 0 ºC to 100 ºC 0.04 ºC 100 ºC to 260 ºC 0.05 ºC 260 ºC to 300 ºC 0.06 ºC 300 ºC to 400 ºC 0.07 ºC 400 ºC to 600 ºC 0.07 ºC 600 ºC to 630 ºC 0.23 ºC 25 mv to 90 mv 0.000 97 mv 1 V to 2.5 V 0.000 15 V 10 V to 25 V 0.001 5 V 100 V to 250 V 0.02 V 1 ma to 25 ma 0.003 3 ma 35 ma to 90 ma 0.018 ma 20 mv to 90 mv 0.008 9 mv 0 V to 2.5 V 0.000 05 V 2.5 V to 13 V 0.000 78 V 1 ma to 20 ma 0.003 2 ma 650 ºC to 1 750 ºC 0.52 ºC Electrical Simulation of Thermocouple Output 400 ºC to 2 220 ºC 0.97 ºC 100 ºC to 900 ºC 0.26 ºC Issue: 10/2016 This supplement is in conjunction with certificate #L16-368-R1 Page 6 of 9

Electrical Thermocouple Type J FO Thermocouple Type K FO Thermocouple Type L FO Thermocouple Type N FO Thermocouple Type R FO Thermocouple Type S FO Thermocouple Type T FO Thermocouple Type U FO RTD Pt 385, 100 Ω FO RTD Pt 385, 200 Ω FO 100 ºC to 900 ºC 0.28 ºC Electrical Simulation of Thermocouple Output 100 ºC to 1 200 ºC 0.33 ºC 1 200 ºC to 1 372 ºC 0.4 ºC 150 ºC to 850 ºC 0.32 ºC 100 ºC to 1 200 ºC 0.33 ºC 200 ºC to 1 600 ºC 0.66 ºC 100 ºC to 1 650 ºC 0.57 ºC 100 ºC to 350 ºC 0.21 ºC 100 ºC to 550 ºC 0.33 ºC 100 ºC to 700 ºC 0.28 ºC Electrical Simulation of RTD Output 100 ºC to 550 ºC 0.19 ºC Issue: 10/2016 This supplement is in conjunction with certificate #L16-368-R1 Page 7 of 9

Electrical RTD Pt 385, 500Ω FO RTD Pt 385, 1 000Ω FO RTD Pt 3916, 100Ω FO RTD Pt 3926, 100Ω FO RTD Cu 427, 10Ω FO RTD Ni 672, 120Ω FO 100 ºC to 550 ºC 0.15 ºC Electrical Simulation of RTD Output 100 ºC to 550 ºC 0.14 ºC 100 ºC to 550 ºC 0.16 ºC 100 ºC to 550 ºC 0.18 ºC 0 ºC to 200 ºC 0.36 ºC 0 ºC to 200 ºC 0.16 ºC 1. The CMC (Calibration and Measurement Capability) stated for calibrations included on this scope of accreditation represents the smallest measurement uncertainty attainable by the laboratory when performing a more or less routine calibration of a nearly ideal device under nearly ideal conditions. It is typically expressed at a confidence level of 95 % using a coverage factor k (usually equal to 2). The actual measurement uncertainty associated with a specific calibration performed by the laboratory will typically be larger than the CMC for the same calibration since capability and performance of the device being calibrated and the conditions related to the calibration may reasonably be expected to deviate from ideal to some degree. 2. The laboratories range of calibration capability for all disciplines for which they are accredited is the interval from the smallest calibrated standard to the largest calibrated standard used in performing the calibration. The low end of this range must be an attainable value for which the laboratory has or has access to the standard referenced. Verification of an indicated value of zero in the absence of a standard is common practice in the procedure for many calibrations but by its definition it does not constitute calibration of zero capacity. 3. The presence of a superscript F means that the laboratory performs calibration of the indicated parameter at its fixed location. Example: Outside Micrometer F would mean that the laboratory performs this calibration at its fixed location. Issue: 10/2016 This supplement is in conjunction with certificate #L16-368-R1 Page 8 of 9

4. The presence of a superscript O means that the laboratory performs calibration of the indicated parameter onsite at customer locations. Example: Outside Micrometer O would mean that the laboratory performs this calibration onsite at the customer s location. 5. The presence of a superscript FO means that the laboratory performs calibration of the indicated parameter both at its fixed location and onsite at customer locations. Example: Outside Micrometer FO would mean that the laboratory performs this calibration at its fixed location and onsite at customer locations. 6. Measurement uncertainties obtained for calibrations performed at customer sites can be expected to be larger than the measurement uncertainties obtained at the laboratories fixed location for similar calibrations. This is due to the effects of transportation of the standards and equipment and upon environmental conditions at the customer site which are typically not controlled as closely as at the laboratories fixed location. 7. The term L represents length in inches or millimeters as appropriate to the uncertainty statement. Issue: 10/2016 This supplement is in conjunction with certificate #L16-368-R1 Page 9 of 9