Certificate of Accreditation

Transcription

1 PERRY JOHNSON LABORATORY ACCREDITATION, INC. Certificate of Accreditation has assessed the Laboratory of: Rays Precision Calibration, Inc Nandino Blvd., Lexington, KY (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): Acoustic, Chemical, Dimensional, Electrical, Mass Force & Weighing Devices and Mechanical 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: Accreditation No.: Certificate No.: Tracy Szerszen President/Operations Manager Perry Johnson Laboratory Accreditation, Inc. (PJLA) 755 W. Big Beaver, Suite 1325 Troy, Michigan August 28, 2002 July 30, L 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: Page 1 of 13

2 Acoustic MEASURED INSTRUMENT, QUANTITY OR GAUGE Certificate of Accreditation: Supplement Rays Precision Calibration, Inc Nandino Blvd., Lexington, KY Chester Ray Phone: Accreditation is granted to the facility to perform the following calibrations: RANGE OR NOMINAL DEVICE SIZE AS APPROPRIATE CALIBRATION AND MEASUREMENT CAPABILITY EXPRESSED AS AN UNCERTAINTY (±) CALIBRATION EQUIPMENT AND REFERENCE STANDARDS USED Sound Meter 94 Db 1 db Simpson Sound Output 114 db 1 db Calibrator Chemical MEASURED INSTRUMENT, QUANTITY OR GAUGE RANGE OR NOMINAL DEVICE SIZE AS APPROPRIATE CALIBRATION AND MEASUREMENT CAPABILITY EXPRESSED AS AN UNCERTAINTY (±) CALIBRATION EQUIPMENT AND REFERENCE STANDARDS USED ph Meter 4.01 ph 0.1 ph Buffer Solutions 7.01 ph 0.1 ph ph 0.1 ph Dimensional MEASURED INSTRUMENT, QUANTITY OR GAUGE RANGE OR NOMINAL DEVICE SIZE AS APPROPRIATE CALIBRATION AND MEASUREMENT CAPABILITY EXPRESSED AS AN UNCERTAINTY (±) CALIBRATION EQUIPMENT AND REFERENCE STANDARDS USED Height Gages Up to 1200 mm ( L) µm Gage Blocks and Height Master Dial or Digital Indicators 0.01mm to 50 mm ( L) µm P&W Super Mic. Calipers (dial or digital) Up to 600 mm ( L) µm Caliper Checker 600 mm to mm ( L) µm Gage Blocks Micrometers (outside) Up to 100 mm ( L) µm Gage Block 100 mm to 600 mm ( L) µm Test Indicators 0.01 mm to 1.5 mm ( L) µm P&W Super Mic. Pin/ Plug Gages 0.02 mm to 200 mm ( D) µm P&W Super Mic. Depth Micrometers Up to 300 mm ( L) µm Gage Blocks Thread Plugs Pitch Diameter Thread Plugs Major Diameter Thread Ring Gages Major Diameter Height Masters (Cadillac Gage) 0-80 to 4-10 ( D) µin Measuring over wires with P&W Super Mic to 4-10 (66 + 2D) µin P&W Super Mic. 1.6 mm to 200 mm ( D) µm Thread Setting Plugs Up to 300 mm ( L) µm Gage Blocks and Electronic Dimensional Comparator Plain Ring Gages 2 mm to 150 mm ( D) µm Universal Measuring Machine & Gage blocks Bore Gages 1 mm to 200 mm ( L) µm P&W Super Mic and or Master Ring Gages Length Standards 10 mm to 200 mm ( L) µm P&W Super Mic., Gage (Spherical end) 200 mm to mm ( L) µm Blocks and Electronic Dimensional Comparator Issue: 7/12 This supplement is in conjunction with certificate #L Page 2 of 13

3 Length Standards 10mm to 200 mm ( L) µm Blocks and Electronic (Flat End) 200mm to1200mm µm Dimensional Comparator Dial or Digital Indicators 0.01 mm to 50 mm ( L) µm P&W Super Mic. Calipers (dial or digital) Surface Finish (Profilometers) Up to 600 mm ( L) µm Caliper Checker 0.4 µm 0.15 µm Master surface 3.05 µm 0.4 µm Finish standards Angle Blocks 2 to Gage blocks, Optical Comparator Surface Plate Repeat Measurement in 60 µin Repeat O Meter Optical Comparators X and Y linearity 6 in to 40 in ( L) µin Glass Standard Radius Gages 0.5 mm to 25 mm ( L) µm Optical Comparator Levels 2 to Direct Comparison & Gage blocks Electrical MEASURED INSTRUMENT, QUANTITY OR GAUGE Equipment to Output Resistance Equipment to Output Resistance Equipment to Generate Capacitance RANGE (AND SPECIFICATION WHERE APPROPRIATE) CALIBRATION AND MEASUREMENT CAPABILITY EXPRESSED AS AN UNCERTAINTY (±) CALIBRATION EQUIPMENT AND REFERENCE STANDARDS USED 1 to Ω % of output (+0.008Ω) 11 Ω to Ω % of output(+0.015ω) (4 wire method) 33 Ω to Ω % of output (+0.015Ω) 110 Ω to Ω % of output (+0.015Ω) 330 Ω to kω % of output (+0.06Ω) 1.1 kω to kω % of output(+0.06ω) 3.3 kω to kω % of output (+.6Ω) 11 kω to kω % of output (+0.6Ω) 33 kω to kω % of output (+0.6Ω) 110 kω to kω % of output (+0.6Ω) 330 kω to MΩ % of output(+6ω) 1.1 MΩ to MΩ 0.015% of output(+55kω) 3.3 MΩ to MΩ 0.5 % of output(+55kω) 11 MΩ to MΩ 0.1 % of output(+550 kω) 33 MΩ to MΩ 0.5 % of output(+1 MΩ) (4 wire method) 110 MΩ to MΩ 0.5 % of output(+1mω) 330 MΩ to MΩ 1.5 % of output(+2mω) 0.19 nf to nf 0.5 % reading nf 3.3 nf to nf 0.25 % reading nf

4 Type B Type C Type E Type J Type K 11 nf to nf 0.25 % reading nf 33 nf to nf 0.25 % reading nf 110 nf to nf 0.25 % reading nf 0.33 µf to µf 0.25 % reading + 1 nf 1.1 µf to µf 0.25 % reading + 3 nf 3.3 µf to µf 0.25 % reading + 10 nf 11 µf to µf 0.4 % reading + 30 nf 33 µf to µf 0.45 % reading nf 110 µf to µf 0.45 % reading nf 0.33 mf to mf 0.45 % reading + 1 µf 1.1 mf to mF 0.45 % reading + 3 µf 3.3 mf to mf 0.45 % reading + 10 µf 11 mf to mf 0.75 % reading + 30 µf 33 mf to 110 mf 1.1 % reading µf 600 ºC to 800 ºC 0.44 ºC Electrical Simulation 800 ºC to ºC 0.34 ºC of Thermocouple Output ºC to ºC 0.3 ºC ºC to ºC 0.33 ºC 0 ºC to 150 ºC 0.3 ºC 150 ºC to 650 ºC 0.26 ºC 650 ºC to ºC 0.31 ºC ºC to ºC 0.5 ºC ºC to ºC 0.84 ºC -250 ºC to -100 ºC 0.5 ºC -100 ºC to 25 ºC 0.16 ºC -25 ºC to 350 ºC 0.14 ºC 350 ºC to 650 ºC 0.16 ºC 650 ºC to ºC 0.21 ºC -250 ºC to -100 ºC 0.5 ºC -210 ºC to -100 ºC 0.27 ºC -100 ºC to -30 ºC 0.16 ºC -30 ºC to 150 ºC 0.14 ºC 150 ºC to 760 ºC 0.17 ºC 760 ºC to ºC 0.23 ºC -200 ºC to 100 ºC 0.33 ºC -100 ºC to 25 ºC 0.18 ºC -25 ºC to 120 ºC 0.16 ºC 120 ºC to ºC 0.26 ºC ºC to ºC 0.4 ºC

5 Type L Type N Type R Type U Type S Type T RTD Pt 385, Ω RTD Pt 3926, 100 Ω -200 ºC to 100 ºC 0.37 ºC -100 ºC to 800 ºC 0.26 ºC 800 ºC to 900 ºC 0.17 ºC -200 ºC to 100 ºC 0.4 ºC -100 ºC to -25 ºC 0.22 ºC -25ºC to 120 ºC 0.19 ºC 120 ºC to 410 ºC 0.18 ºC 410 ºC to ºC 0.27 ºC 0 ºC to 250 ºC 0.57 ºC 250 ºC to 400 ºC 0.35 ºC 400 ºC to ºC 0.33 ºC ºC to ºC 0.4 ºC -200 ºC to 0 ºC 0.56 ºC 0 ºC to 600 ºC 0.27 ºC Electrical Simulation of Thermocouple Output 0 ºC to 250 ºC 0.47 ºC 250 ºC to ºC 0.36 ºC ºC to ºC 0.37 ºC ºC to ºC 0.46 ºC -250 ºC to -150 ºC 0.63 ºC -150 ºC to 0 ºC 0.24 ºC 0 ºC to 120 ºC 0.16 ºC 120 ºC to 400 ºC 0.14 ºC -200 ºC to -80 ºC 0.05 ºC Electrical Simulation -80 ºC to 0 ºC 0.05 ºC of RTD Output 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 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 -200 ºC to -190 ºC 0.25 ºC -190 ºC to -80 ºC 0.04 ºC

6 RTD Pt 3916, 100 Ω RTD Pt 3916, 100 Ω RTD Pt 385, 200 Ω RTD Pt 385, 500 Ω RTD Pt 385, 1000 Ω RTD Pt 3916, 100 Ω RTD PtNi 385, 120 Ω -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 Electrical Simulation 400 ºC to 600 ºC 0.1 ºC of RTD output 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 260 ºC to 300 ºC 0.08 ºC 300 ºC to 400 ºC 0.08 ºC 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 300 ºC to 400 ºC 0.09 ºC Electrical Simulation of RTD output Fluke 5520A -80 ºC to 0 ºC 0.08 ºC 0 ºC to 100 ºC 0.08 ºC 100 ºC to 260 ºC 0.14 ºC

7 RTD Cu 427, 10 Ω -100 ºC to 260 ºC 0.3 ºC 10 Hz to 45 Hz 1 mv to mv 0.08 % reading + 6 mv 45 Hz to 10 khz 1 mv to mv % reading + 6 mv 10 khz to 20 khz 1 mv to mv 0.02 % reading + 6 mv 20 khz to 50 khz 1 mv to mv 0.1 % reading + 6 mv 50 khz to 100 khz 1 mv to mv 0.35 % reading + 12 mv 100 khz to 500 khz 1 mv to mv 0.8 % reading + 50 mv 10 Hz to 45 Hz 33 mv to mv 0.03 % reading + 8 mv 45 Hz to 10 khz 33 mv to mv % reading + 8 mv 10 khz to 20 khz 33 mv to mv % reading + 8 mv 20 khz to 50 khz 33 mv to mv % reading + 8 mv 50 khz to 100 khz 33 mv to mv 0.08 % reading + 32 mv 100 khz to 500 khz 33 mv to mv 0.2% reading + 70 mv 10 Hz to 45 Hz 0.33 V to V 0.03 % reading + 50 mv 45 Hz to 10 khz 0.33 V to V % reading + 60 mv 10 khz to 20 khz 0.33 V to V % reading + 60 mv 20 khz to 50 khz 0.33 V to V 0.03 % reading + 50 mv 50 khz to 100 khz 0.33 V to V 0.07 % reading mv 100 khz to 500 khz 0.33 V to V 0.24 % reading mv 10 Hz to 45 Hz 3.3 V to V 0.03 % reading mv 45 Hz to 10 khz 3.3 V to V % reading mv 10 khz to 20 khz 3.3 V to V % reading mv 20 khz to 50 khz 3.3 V to V % reading mv 50 khz to 100 khz 3.3V to V 0.09 % reading mv 45 Hz to 1 khz 33 V to V % reading mv 1 khz to 10 khz 33 V to V 0.02 % reading mv 10 khz to 20 khz 33 V to V % reading mv 20 khz to 50 khz 33 V to V 0.03 % reading mv

8 50 khz to 100 khz 33 V to V 0.2 % reading mv 45Hz to 1kHz 330 V to V 0.03 % reading mv 1kHz to 5kHz 330 V to V % reading mv 5kHz to 10kHz 330 V to V 0.03 % reading mv 10 Hz to 20 Hz 10 mv to mv 0.2 % reading mv 20 Hz to 45 Hz 10 mv to mv 0.1 % reading mv 45 Hz to 1 khz 10 mv to mv 0.1 % reading mv 1 khz to 5 khz 10 mv to mv 0.2 % reading mv 5 khz to 10 khz 10 mv to mv 0.4 % reading mv 10 khz to 30 khz 10 mv to mv 5 % reading mv 10 Hz to 20 Hz 0.33 V to V 0.2 % reading mv 20 Hz to 45 Hz 0.33 V to V 0.1 % reading mv 45 Hz to 1 khz 0.33 V to V 0.09 % reading mv 1 khz to 5 khz 0.33 V to V 0.2 % reading mv 5 khz to 10 khz 0.33 V to V 0.4 % reading mv 10 khz to 30 khz 0.33 V to V 5.0 % reading mv 10 Hz to 20 Hz 3.3 V to 5 V 0.2% reading mv 20 Hz to 45 Hz 3.3 V to 5 V 0.1 % reading mv 45 Hz to 1 khz 3.3 V to 5 V 0.09 % reading mv 1 khz to 5 khz 3.3 V to 5 V 0.2 % reading mv 5 khz to 10 khz 3.3 V to 5 V 0.4 % reading mv Equipment to Output Frequency 0.01Hz to Hz % + 5 µhz 120 Hz to Hz % + 5 µhz HP5334B Universal Counter 1.2 khz to kHz % + 5 µhz 12 khz to khz % + 5 µhz 120 khz to khz % + 5 µhz 1.2 MHz to 2 MHz % + 5 µhz 10 Hz to 20Hz 29 µa to µa 0.2 % reading ma 20 Hz to 45 Hz 29 µa to µa 0.15 % reading ma 45 Hz to 1 khz 29 µa to µa % reading ma 1 khz to 5 khz 29 µa to µa 0.3 % reading ma

9 5 khz to 10 khz 29 µa to µa 0.8 % reading ma 10 khz t 30 khz 29 µa to µa 1.6 % reading ma 10 Hz to 20 Hz 0.33 ma to ma 0.2 % reading ma 20 Hz to 45 Hz 0.33 ma to ma % reading ma 45 Hz to 1 khz 0.33 ma to ma 0.1 % reading ma 1 khz to 5 khz 0.33 ma to ma 0.2 % reading ma 5 khz to 10 khz 0.33 ma to ma 0.5 % reading ma 10 khz t 30 khz 0.33 ma to ma 1.0 % reading ma 10 Hz to 20 Hz 3.3 ma to ma 0.18 % reading + 2 ma 20 Hz to 45 Hz 3.3 ma to ma 0.09 % reading + 2 ma 45 Hz to 1 khz 3.3 ma to ma 0.04 % reading + 2 ma 1 khz to 5 khz 3.3 ma to ma 0.08 % reading + 2 ma 5 khz to 10 khz 3.3 ma to ma 0.2 % reading + 3 ma 10 khz t 30 khz 3.3 ma to ma 0.4 % reading + 4 ma 10 Hz to 20 Hz 33 ma to ma 0.18 % reading + 20 ma 20 Hz to 45 Hz 33 ma to ma 0.09 % reading + 20 ma 45 Hz to 1 khz 33 ma to ma 0.04 % reading + 20 ma 1 khz to 5 khz 33 ma to ma 0.1 % reading + 50 ma 5 khz to 10 khz 33 ma to ma 0.2 % reading ma 10 khz to 30 khz 33 ma to ma 0.4 % reading ma 10 Hz to 45 Hz 0.33 A to A 0.18 % reading ma 45 Hz to 1 khz 0.33 A to A 0.05 % reading ma 1 khz to 5 khz 0.33 A to A 0.06 % reading ma 5 khz to 10 khz 0.33 A to A 2.5 % reading ma 10 Hz to 45 Hz 1.1 A to A 0.18 % reading ma 45 Hz to 1 khz 1.1 A to A 0.06 % reading ma 1 khz to 5 khz 1.1 A to A 0.6 % reading ma 5 khz to 10 khz 1.1 A to A 2.5 % reading ma

10 45 Hz to 100 Hz 3 A to A 0.06 % reading ma 100 Hz to 1 khz 3 A to A 0.1 % reading ma 1 khz to 5 khz 3 A to A 3 % reading ma 45 Hz to 100 Hz 11 A to 20.5 A 0.12 % reading ma 100 Hz to 1 khz 11 A to 20.5 A 0.15 % reading ma 1 khz to 5 khz 11 A to 20.5 A 3 % reading ma 10 Hz to 100 Hz 29 µa to µa 0.25 % reading ma 100 Hz to 1 khz 29 µa to µa 0.6 % reading ma 10 Hz to 100 Hz 0.33 ma to ma 0.25 % reading ma 100 Hz to 1 khz 0.33 ma to ma 0.6 % reading ma 10 Hz to 100 Hz 3.3 ma to ma 0.08 % reading + 4 ma 100 Hz to 1 khz 3.3 ma to ma 0.2 % reading + 10 ma 10Hz to 100Hz 33 ma to ma 0.08 % reading + 40 ma 100Hz to 1kHz 33mA to ma 0.2 % reading ma 10 Hz to 100 Hz 0.33 A to A 0.12 % reading ma 100 Hz to 440 Hz 0.33 A to A 0.3 % reading ma 10 Hz to 100 Hz 3 A to 20.5 A 0.12 % reading ma 100 Hz to 1 khz 3 A to 20.5 A 1.0 % reading ma Equipment to Output DC Current Equipment to Output DC Volts Up to ma % reading µa Up to ma 0.01 % reading µa Up to ma 0.01 % reading µa Up to A 0.03 % reading + 44 µa 1.1 A to A % reading + 40 µa Up to A (20 A range) 0.06 % reading µa 11 A to 20.5 A 0.1 % reading µa Up to mv 0.006% reading + 3µV Up to V % reading + 5 µv

11 Up to V % reading + 50 µv 30 V to V % reading µv 100 V to V % reading µv Mass, Force, and Weighing Devices MEASURED INSTRUMENT, QUANTITY OR GAUGE Scales and Balances Force Gage & Load Cells Mechanical MEASURED INSTRUMENT, QUANTITY OR GAUGE RANGE (AND SPECIFICATION WHERE APPROPRIATE) CALIBRATION AND MEASUREMENT CAPABILITY EXPRESSED AS AN UNCERTAINTY (±) CALIBRATION EQUIPMENT AND REFERENCE STANDARDS USED 10 g to 120 g 3 mg Class 1 Weights (Resolution = g) 120 g to 500 g 6 mg (Resolution = g) 1 kg to 22 kg 4 g Class F Weights (Resolution = 0.2 g) 22 kg to 90 kg (Resolution = kg) 11 g 0.5 kg to 225 kg 0.1 % of reading RANGE (AND SPECIFICATION WHERE APPROPRIATE) CALIBRATION AND MEASUREMENT CAPABILITY EXPRESSED AS AN UNCERTAINTY (±) CALIBRATION EQUIPMENT AND REFERENCE STANDARDS USED Compression 10 kg to 90 kg 0.1 % of reading Class F weights or 90 kg to kg 0.3 % of reading Direct Comparison With Load Cells Tension 10 kg to 90 kg 0.1 % of reading 90 kg to kg 0.3 % of reading Torque Wrench 5 N m to N m 0.7 % of reading Dead Weights & arm Torque Analyzer Torque Analyzer 1 N m to N m 0.3 % of reading Dead Weights, master arms & wheels Tachometers 500 rpm to rpm (Resolution = 1 rpm) 2 rpm Comparison with Variable Speed Motor and HT4100 Tachometer Pressure Up to kpa 0.05 % of reading Fluke 725 and 700P kpa to kpa 0.11 % of reading Module Transcat Pressure Gage Dead Weights and Pump Indirect Verification of Rockwell Hardness Tester HRA 60 HRA to 70 HRA 1.3 HRA ASTM E18 and 70 HRA to 79 HRA 1.3 HRA 79 HRA to 93 HRA 0.75 HRA Indirect Verification 40 HRB to 60 HRB 1.4 HRB Calibrated Rockwell Hardness Test Blocks

12 of Rockwell Hardness Tester HRB Indirect Verification of Rockwell Hardness Tester HRC 60 HRB to 75 HRB 1.4 HRB 75 HRB to 93 HRB 1.4 HRB 20 HRC to 40 HRC 1.3 HRC 40 HRC to 59 HRC 1.3 HRC 59 HRC to 70 HRC 0.78 HRC Indirect Verification of Rockwell Hardness Tester HR15N 63 HR15N to 73 HR15N 1.6 HR15N 73 HR15N to 83 HR15N 1.3HR15N 83 HR15N to 94 HR15N 0.9 HR15N Indirect Verification of Rockwell Hardness Tester HR30N Indirect Verification of Rockwell Hardness Tester HR30T 44 HR30N to 55 HR30N 1.4 HR30N 55 HR30N to 69 HR30N 1.3 HR30N 69 HR30N to 85 HR30N 1.3 HR30N 40 HR30T to 50 HR30T 0.93 HR30T 50 HR30T to 63 HR30T 1.7 HR30T 63 HR30T to 76 HR30T 1.4 HR30T 1. The CMC (Calibration and Measurement Capability) stated for calibrations included on this scope of accreditation represent the smallest measurement uncertainties attainable by the laboratory when performing a more or less routine calibration of a nearly ideal device under nearly ideal conditions. It is 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 term D represents diameter in inches or millimeters appropriate to the uncertainty statement. 4. The term L represents length in inches or millimeters appropriate to the uncertainty statement.

13 July 30, 2012 Chester Ray Rays Precision Calibration, Inc Nandino Blvd. Lexington, KY Dear Mr. Ray: This letter is to confirm that you have successfully completed your reaccreditation assessment. A certificate has now been granted and posted on our website. As you are aware, PJLA will no longer be issuing expiration dates on our certificates. Your certificate # L will remain valid as long as you continue to maintain your annual assessments and reaccreditation assessments as stated in your customer agreement with PJLA. At this time, we have confirmed that your annual assessments will be conducted during the month of May each calendar year. This will include an interim surveillance assessment and a full system reassessment to be completed by May Once your reassessment is conducted and approved by our accreditation committee a revised status letter will be provided to you. Please allow PJLA at least 120 days from your assessment due date to issue this letter. Please feel free to release this letter to any interested parties as confirmation of your certificate validity. Also, please remind them that your certificate is posted on our website at all times. Any changes in regards to your accreditation status will be reflected on our website. We would like to thank you for your patronage over the past years and look forward to continuously serving your accreditation needs in the future. If we can assist you any further, please feel free to contact us at any time. Sincerely, Tracy Szerszen President/Operations Manager