Certificate of Accreditation

PERRY JOHNSON LABORATORY ACCREDITATION, INC. Certificate of Accreditation Perry Johnson Laboratory Accreditation, Inc. has assessed the Laboratory of: Palenque 1 A, Bello Horizonte,. (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, Chemical, Time and Frequency, Thermodynamic, 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: July 15, 2013 August 17, 2017 September 30, 2019 Tracy Szerszen President/Operations Manager Perry Johnson Laboratory Accreditation, Inc. (PJLA) 755 W. Big Beaver, Suite 1325 Troy, Michigan 48084 Accreditation No.: Certificate No.: 68935 L17-357 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 8

Metrología KGLM Contact Name: Rodrigo Ramirez Bazán. Phone: 222-893-6567 Dimensional AND Caliper FO 2.5 mm to 300 mm (11.95 + 0.011L) µm Master Blocks Grade "0" NMX-CH-002-IMNC Caliper checker Micrometer FO 2.5 mm to 25 mm (0.74 + 0.01L) µm Master Blocks Grade "0" NMX-CH-099-IMNC Graduated Ruler FO 5 mm to 2 000 mm (595 + 0.038L) µm Master metal Rule NMX-CH-148-IMNC Measurement Tape FO 5 mm to 2 000 mm (595 + 0.038L) µm Master metal Rule NMX-CH-148-IMNC Time and Frequency Digital Periodic Measurement Instruments O Rotational Frecuency Tachometers O Rotational Frecuency Centrifuges, Industrial Tachometers F Chronometers, Stop Watches F AND 5 mhz to 100 khz (8.23 x 10-5 + 6.9 x 10-8 Hz) Hz Frequency Generator, Universal Counter 5 mhz to 2 khz (1.45 x 10-4 + 1.17 x 10-4 Hz) Hz Frequency Generator, Universal Counter 17 mhz to 1.67 khz (3 x 10-2 + 1.24 x 10-4 Hz) Hz Digital Tachometer 60 s to 86 400 s 0.87 s Digital Chronometer NIST SP 960-12 Chemical ph Calibration, Indication, and Control Equipment FO AND 4 ph 0.021 ph Reference Solution 7 ph 0.025 ph 10 ph 0.059 ph Cenam Traceable CENAM Technical Guide Issue: 08/2017 This supplement is in conjunction with certificate #L17-357 Page 2 of 8

Thermodynamic AND Hygrometers FO 10 % RH to 90 % RH (1.2 + 0.005 %RH) % RH Capacitance Hygrometers 91 % RH to 95 % RH (1.6 + 0.19 %RH) % RH Capacitance Hygrometers Digital or analog Thermometers FO Liquid In Glass Thermometers O Climatic Chambers, Freezer, Incubators, Oven, Sterilizer, Furnaces F Infrared / Non-Contact Thermometers O Mechanical -70 ºC to 0 ºC (7.1 x 10-2 + 1.7 x 10-3 T) ºC Resistance Thermometer 0 ºC to 420 ºC (5.9 x 10-2 + 4.6 x 10-4 T) ºC 420 ºC to 900 ºC (3 x 10-1 + 3 x 10-3 T) ºC Type N Thermocouple -38 ºC to 0 ºC (7.2 x 10-2 + 2.7 x 10-3 T) ºC Resistance thermometer 0 ºC to 200 ºC (4.6 x 10-2 + 2.1 x 10-3 T) ºC ASTM E1-14 200 ºC to 420 ºC (3.8 x 10-1 + 7.6 x 10-4 T) ºC -70 ºC to 200 ºC 1 ºC Type T, Thermocouple IEC 60068-70 ºC to 200 ºC 1.1 ºC Type K, Thermocouple IEC 60068 200 ºC to 900 ºC (5.97 x 10 3 + 4.61 x 10-3 T) ºC -35 ºC to 25 ºC (2 + 3.7 x 10-2 T) ºC Resistance thermometer black body cavity 25 ºC to 850 ºC 29 ºC to 42 ºC (0.7 + 9.8 x 10-3 T) ºC 0.27 ºC Resistance thermometer Type N thermocouple Black Body Cavity (Spectral Response 8 um to 14 um) AND General Containers O 5 000 ml to 200 000 ml (3.7 x 10-1 + 3.2 x 10-4 V) ml Electronic Balance Volumetric Instruments 0.1 ml to 10 ml (1.4 x 10-3 + 3.1 x 10-4 V) ml Analytical Balance (Pipettes, Burettes) O 10 ml to 100 ml (1.4 x 10-3 + 3.1 x 10-4 V) ml (Res.= 0.01 mg) ISO 4787 Volumetric Instruments 1 ml to 100 ml (6.5 x 10-3 + 1.5 x 10-4 V) ml Electronic Balance (Volumetric Flasks, 100 ml to 5 000 ml (1.4 x 10-2 + 1.3 x10-4 V) ml (Res.= 0.01 mg) Graduated Cylinders) O ISO 4787 Pressure Gauges FO 3 psi to 30 psi (1.4 x 10-2 + 2.58 x 10-3 P) psi Digital Pressure Gage -14 psi to 30 psi Crystal Eng. Corp. is33i -14 psi to 36 psi Issue: 08/2017 This supplement is in conjunction with certificate #L17-357 Page 3 of 8

Mechanical AND Pressure Gauges FO 30 psi to 300 psi (1.1 x 10-2 + 5.9 x 10-4 P) psi Digital Pressure Gage -14 psi to 300 psi 300 psi to 500 psi (3.1 x 10-1 + 8.5 x 10-4 P) psi Digital Pressure Gage 0 psi to 500 psi 500 psi to 2 000 psi (2.3 x 10-1 + 1.1 x 10-3 P) psi Digital Pressure Gage 0 psi to 2 000 psi 2 000 psi to 10 000 psi (1.9 + 1 x 10-3 P) psi Digital Pressure Gage 0 psi to 10 000 psi Vacuum Gauges FO -11 psi to - 1 psi 0.05 psi Digital Pressure Gage, is 33-14 psi to 30 psi -14 psi to 36 psi Absolute Pressure Gages and Barometers FO Piston-Operated Pipettes And Dispensers O 0.077 bar to 1 bar 1.3 mbar Digital Barometers CONST 211 0 to 1 bar 0.1 µl to 10 µl (6 x 10-2 + 1 x 10-3 V) µl Analytical Balance (Res. = 0.001 mg) 10 µl to 1 000 µl (3.6 x 10-1 + 1.2 x 10-3 V) µl Analytical Balance 1 ml to 10 ml (2.58 x 10-3 + 1.26 x 10-3 V) ml 10 ml to 100 ml (1.24 x 10-2 + 2.02 x 10-3 V) ml (Res. = 0.01mg) ISO-DIS-8655-6:2001 Sphygmomanometers FO 30 mmhg to 300 mmhg 0.72 mmhg Digital Pressure Gage NOM-009-SCFI, is 33-14 psi to 30 psi -14 psi to36 psi Security Valves Relief Point (Diameter 25.4 mm) FO 3 psi to 30 psi 0.28 psi Digital pressure gage NOM-093-SCFI, is 33-14 psi to 30 psi - 14 psi to 36 psi Issue: 08/2017 This supplement is in conjunction with certificate #L17-357 Page 4 of 8

Mass, Force and Weighing Devices F1, F2, M1, M2, M3 F F2, M1, M2, M3 F M1, M2, M3 F Analytical Balance O Scales O AND 1 mg 0.004 1 mg OIML Class E2 2 mg 0.004 6 mg 5 mg 0.004 1 mg 10 mg 0.003 8 mg 20 mg 0.006 1 mg 50 mg 0.007 2 mg 100 mg 0.011 mg 200 mg 0.009 5 mg 500 mg 0.015 mg 1 g 0.013 mg 2 g 0.015 mg 5 g 0.019 mg 10 g 0.025 mg 20 g 0.039 mg 50 g 0.08 mg 100 g 0.15 mg 200 g 0.29 mg 500 g 0.79 mg 1 kg 1.6 mg 2 kg 6.5 mg OIML Class E2 5 kg 2 kg 18 mg 8 mg OIML Class F1 5 kg 24 mg 10 kg 69 mg 20 kg 94 mg 1 mg to 40 g (Res.= 0.001 mg) 1 mg to 250 g (Res.= 0.01 mg) 1 mg to 500 g (Res.= 0.1 mg) 1 kg to 10 kg (Res.= 0.1 g) 200 kg to 500 kg (Res.= 0.1 kg) (1.07 x 10-5 + 1.65 x 10-6 Wt) g Class E2 (6.82 x 10-5 + 6.15 x 10-7 Wt) g (2.69 x 10-4 + 4.28 x 10-7 Wt) g (1.15 x 10-1 + 9.40 x 10-7 Wt) g Class F1 (300 + 5.5 x 10-5 Wt) g Class M1 Issue: 08/2017 This supplement is in conjunction with certificate #L17-357 Page 5 of 8

Mass, Force and Weighing Devices Balances O Force Source (Compression and Tension) F AND 10 kg to 60 kg (2.44 + 1.32 x 10-5 Wt) g Class M1 (Res.= 1 g) 60 kg to 120 kg (4.89 + 1.31 x 10-5 Wt) g (Res.= 2 g) 120 kg to 200 kg (Res.= 2 g) (7.02 x 10 1 + 1.12 x 10-4 Wt) g 1 N to 20 N 0.1 % of reading OIML Class M1 0.49 kn to 44 kn 0.4 % of reading Load Cell NMX-CH-7500-1- IMNC Electrical Thermocouple Type T FO Thermocouple Type E FO Thermocouple Type J FO Thermocouple Type K FO Thermocouple Type N FO Thermocouple Type R FO AND -200 ºC to 0 ºC 0 ºC to 400 ºC -200 ºC to -100 ºC 1.1 ºC 0.68 ºC 1 ºC Electrical Simulation of Thermocouple Output Process Calibrator ASTM E230-12 Fluke 701-100 ºC to 1 000 ºC 0.85 ºC -200 to 100 ºC 1.1 ºC -100 ºC to 800 ºC 0.83 ºC 800 ºC to 1 200 ºC 0.96 ºC -200 to 100 ºC 1.3 ºC -100 ºC to 1 200 ºC 1 ºC 1 200 to 1 372 ºC 1.2 ºC -200 ºC to -100 ºC 1.7 ºC -100 ºC to 900 ºC 1.3 ºC 900 ºC to 1300 ºC 1.1 ºC -20 ºC to 0 ºC 3.4 ºC 0 ºC to 100 ºC 2.7 ºC 100 ºC to 1 760 ºC 2 ºC Issue: 08/2017 This supplement is in conjunction with certificate #L17-357 Page 6 of 8

Electrical Thermocouple Type S FO Thermocouple RTD PT100 (385) FO Thermocouple RTD PT100 (3926, 3916) FO ph Calibration, Indication, and Control Equipment FO AND -20 ºC to 0 ºC 3.4 ºC Electrical Simulation of 0 ºC to 200 ºC 2.7 ºC Thermocouple Output Process Calibrator 200 ºC to 1 400 ºC 2 ºC ASTM E230-12 1 400 ºC to 1 760 ºC 2.2 ºC Fluke 701-200 ºC to 0 ºC 0.44 ºC Electrical Simulation of 0 ºC to 400 ºC 0.75 ºC RTD Output Process calibrator 400 ºC to 800 ºC 1.1 ºC ASTM E1137/E1137M OIML R84-190 ºC to 0 ºC 0.44 ºC Fluke 701 0 ºC to 630 ºC 0.77 ºC 0 ph to 14 ph 0.016 ph Electrical Simulation of ph by DC voltage Output Process Calibrator Fluke 701 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. 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. Issue: 08/2017 This supplement is in conjunction with certificate #L17-357 Page 7 of 8

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. 8. The term P represents pressure in psi units appropriate to the uncertainty statement. 9. The term T represents temperature in ºC or ºF as appropriate to the uncertainty statement. 10. The term Wt represents weight in pounds or grams (including SI multiple and submultiple units) appropriate to the uncertainty statement. 11. The term V represents Volume in liters or milliliters as appropriate to the uncertainty statement 12. The term Hz represents frequency in Hz as appropriate to the uncertainty statement. 13. The term RH represents Relative Humidity in % of RH as appropriate to the uncertainty statement. Issue: 08/2017 This supplement is in conjunction with certificate #L17-357 Page 8 of 8