CERTIFICATE OF ACCREDITATION

Transcription

1 CERTIFICATE OF ACCREDITATION ANSI-ASQ National Accreditation Board 500 Montgomery Street, Suite 625, Alexandria, VA 22314, This is to certify that Micro Precisión Calibration de Mexico S. de R.L. de C.V. Calle Vidrio No Colonia Moderna Guadalajara Jalisco 44170, Mexico has been assessed by ANAB and meets the requirements of international standard ISO/IEC 17025:2005 and national standards ANSI/NCSL Z AND ANSI/NCSL Z while demonstrating technical competence in the field of CALIBRATION Refer to the accompanying Scope of Accreditation for information regarding the types of calibrations to which this accreditation applies. AC Certificate Number Certificate Valid: 08/22/ /31/2018 Version No. 004 Issued: 08/22/2017 This laboratory 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 (refer to joint ISO-ILAC-IAF Communiqué dated April 2017).

2 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2005, ANSI/NCSL Z (R2002), AND ANSI/NCSL Z (R2013) Micro Precisión Calibration de Mexico S. de R.L. de C.V. Calle Vidrio No Colonia Moderna Guadalajara Jalisco 44170, Mexico Alberto Gonzalez 52 (33) CALIBRATION Valid to: October 31, 2018 Certificate Number: AC Acoustics and Vibration Parameter / (74 to 104) db 0.6 db Sound Level - Source db (125 to 2 000) Hz 114 db Hz 0.6 db 0.6 db Genrad 1986 Sound Level Calibrator Chemical Quantities Parameter / ph Measure (4, 7, 10) ph ph Conductivity - Measure 1 µs 5 µs 10 µs 100 µs µs µs 0.48 µs 0.93 µs 0.93 µs 2.2 µs 3.5 µs 3.7 µs Comparison to Standard Solutions Comparison to Standard Solutions Page 1 of 13

3 Electrical DC/Low Frequency Parameter / DC Voltage 1 - Source DC Voltage 1 - Measure DC Voltage 1 - Measure High Voltage DC Current 1 Source DC Current 1 - Measure Inductance - Source Fixed Points 1 khz Resistance 1 - Measure (0 to 220) mv 220 mv to 2.2 V (2.2 to 11) V (11 to 22) V (22 to 220) V 220 V to 1.1 kv (0 to 100) mv 100 mv to 1V (1 to 10) V (10 to 100) V 100 V to 1 kv (1to 2) kv (2 to 20) kv (0 to 220) ma 220 ma to 22 ma (22 to 220) ma 220 ma to 2.2 A (2.2 to 11) A 12 µv/v µv 12 µv/v µv 11 µv/v µv 12 µv/v µv 13 µv/v + 80 µv 13 µv/v mv 13 µv/v µv 17 µv/v µv 13 µv/v µv 15 µv/v + 30 µv 27 µv/v mv 0.62 mv/v V 0.62 mv/v + 4 V 40 µa/a + 8 na 40 µa/a + 8 na 44 µ A/A + 80 na 47 µa/a µa 57 µa/a + 25 µa Fluke 5700A Opt 003 HP 3458A Vitrek 4600A Fluke 5700A Opt 003 (11 to 20.5) A 1.2 ma/a Fluke 5500A Up to 100 na 100 na to 1 µa (1 to 10) µa (10 to 100) µa 100 µa to 10 ma (10 to 100) ma 100 ma to 1 A 35 µa/a ma 25 µa/a + 40 µa 25 µa/a + 10 µa 25 µa/a + 5 µa 25 µa/a + 5 µa 40 µa/a + 5 µa 0.12 ma/a + 10 µa (1 to 1000) A 5.5 ma/a (1 to 10) A (1 to 100) A (100 to 300) A 1.0 mh 10 mh 50 mh 1 H (0 to 10) Ω (10 to 100) Ω 100 Ω to 100 kω 100 kω to 1 MΩ (1 to 10) MΩ (10 to 100) MΩ 100 MΩ to 1 GΩ 1.2 ma/a 1.4 ma/a 1.7 ma/a 0.54 mh/h 0.27 mh/h 0.63 mh/h 0.8 mh/h 19 µω/ω mω 15 µω/ω mω 13 µω/ω mω 18 µω/ω Ω 59 µω/ω kω 0.58 mω/ω kω 18 mω/ω + 10 kω HP 3458A Fluke 5500A with Current Coil Hall Effect Shunt Monitored with Multimeter Genrad 1482 HP 3458A Page 2 of 13

4 Electrical DC/Low Frequency Parameter / Capacitance 1 - Source 50 Hz to 1 khz Capacitance 1 - Source 50 Hz to 300 Hz Capacitance 1 - Source Resistance 1 - Source Resistance 1 - Source Fixed Points (0.19 to 3.3) nf (3.3 to 330) nf 330 nf to 3.3 µf (3.3 to 33) µf (33 to 330) µf (330 µf to 3.3 mf (3.3 to 33) mf (33 to 110) mf (0.97 to 10) µf 5 mf/f nf 2.5 mf/f nf 2.5 mf/f + 3 nf 4 mf/f + 30 nf 4.5 mf/f µf 4.5 mf/f + 3 µf 7.5 mf/f + 30 µf 11 mf/f µf 60 Hz to 1 khz 0.97 mf/f Up to 11 Ω (11 to 33) Ω (33 to 110) Ω (110 to 330) Ω 330 Ω to 1.1 kω (1.1 to 3.3) kω (3.3 to 11) kω (11 to 33) kω (33 to 110) kω (110 to 330) kω 330 kω to 1.1 MΩ (1.1 to 3.3) MΩ (3.3 to 11) MΩ (11 to 33) MΩ (33 to 110) MΩ (110 to 330) MΩ 330 MΩ to 1.1 GΩ 1.2 mω/ω Ω 1.7 mω/ω 0.2 mω/ω 0.2 mω/ω 90 µω/ω Ω 0.2 mω/ω 90 µω/ω Ω 1 mω/ω 0.11 mω/ω + 6 Ω 1 mω/ω 0.15 mω/ω + 55 Ω 0.2 mω/ω 0.2 mω/ω 0.4 mω/ω 0.6 mω/ω 3.7 mω/ω 18 mω/ω 100 MΩ to 1 GΩ 5.7 mω/ω 1 Ω 10 Ω 100 Ω 1 kω 10 kω 100 kω 1 MΩ 10 MΩ 100 MΩ 0.1 mω/ω 39 µω/ω 24 µω/ω 18 µω/ω 17 µω/ω 19 µω/ω 27 µω/ω 54 µω/ω 0.2 mω/ω Fluke 5520A Fluke 5520A HACS-Z-A Capacitance Decade Box Fluke 5500A HRRS-B Decade Resistance Fluke 5700A Opt 003 Page 3 of 13

5 Electrical DC/Low Frequency Parameter / Electrical Calibration of Thermocouple Indicators 1 Electrical Calibration of RTD Indicating Systems 1 Type E (-250 to -100) ºC (-100 to 650) ºC (650 to 1 000) ºC Type J (-210 to -100) ºC (-100 to 760) ºC (760 to 1 200) ºC Type K (-200 to -100) ºC (-100 to 120) ºC (120 to 1 000) ºC (1 000 to 1 372) ºC Type S (0 to 250) ºC (250 to 1 400) ºC (1 400 to 1 767) ºC Type T (-250 to -150) ºC (-150 to 0) ºC (0 to 400) ºC Pt 385, 100 Ω (-200 to 0) ºC (0 to 100) ºC (100 to 400) ºC (400 to 630) ºC (630 to 800) ºC Pt 3926, 100 Ω (-200 to 0) ºC (0 to 100) ºC (100 to 400) ºC (400 to 630) ºC Pt 3916, 100 Ω (-200 to -190) ºC (-190 to 0) ºC (0 to 300) ºC (300 to 600) ºC (600 to 630) ºC Pt 385, 200 Ω (-200 to 100) ºC (100 to 260) ºC (260 to 600) ºC (600 to 630) ºC 0.5 ºC 0.16 ºC 0.21 ºC 0.27 ºC 0.17 ºC 0.23 ºC 0.33 ºC 0.18 ºC 0.26 ºC 0.04 ºC 0.47 ºC 0.37 ºC 0.46 ºC 0.63 ºC 0.24 ºC 0.16 ºC 0.05 ºC 0.07 ºC 0.1 ºC 0.12 ºC 0.23 ºC 0.05 ºC 0.07 ºC 0.1 ºC 0.12 ºC 0.25 ºC 0.05 ºC 0.08 ºC 0.1 ºC 0.23 ºC 0.04 ºC 0.05 ºC 0.14 ºC 0.16 ºC Fluke 5500A Fluke 5500A Page 4 of 13

6 Electrical DC/Low Frequency Parameter / Electrical Calibration of RTD Indicating Systems 1 AC Voltage 1 - Source Pt 385, 500 Ω (-200 to 100) ºC (100 to 260) ºC (260 to 600) ºC (600 to 630) ºC Pt 385, 1 kω (-200 to 100) ºC (100 to 260) ºC (260 to 600) ºC (600 to 630) ºC PtNi 385, 100 Ω (-80 to 100) ºC (100 to 260) ºC Cu 427, 10 Ω (-100 to 260) ºC (0 to 220) mv (10 to 20) Hz (20 to 40) Hz 40 Hz to 20 khz 100 khz to 1 MHz 220 mv to 2.2 V (10 to 20) Hz (20 to 40) Hz 40 Hz to 20 khz 100 khz to 1 MHz (2.2 to 22) V (10 to 20) Hz (20 to 40) Hz 40 Hz to 20 khz 100 khz to 1 MHz (22 to 220) V (10 to 20) Hz (20 to 40) Hz 40 Hz to 20 khz 100 khz to 1 MHz 0.05 ºC 0.06 ºC 0.09 ºC 0.11 ºC 0.03 ºC 0.05 ºC 0.07 ºC 0.23 ºC 0.08 ºC 0.14 ºC 0.3 ºC 0.55 mv/v + 13 μv 0.21 mv/v + 8 μv 0.11 mv/v + 8 μv 0.37 mv/v + 8 μv 0.85 mv/v + 25 μv 3.4 mv/v + 80 μv 0.5 mv/v + 80 μv 0.16 mv/v + 25 μv 75 μv/v + 6 μv 0.12 mv/v + 16 μv 0.25 mv/v + 70 μv 2.2 mv/v mv 0.5 mv/v mv 0.16 mv/v mv 75 μv/v mv 0.12 mv/v mv 0.25 mv/v mv 3.4 mv/v mv 0.5 mv/v + 8 mv 0.16 mv/v mv 80 μv/v mv 0.22 mv/v mv 0.5 mv/v + 8 mv 16 mv/v V Fluke 5500A Fluke 5700A Opt 003 Page 5 of 13

7 Electrical DC/Low Frequency Parameter / AC Voltage 1 - Source AC Voltage 1 - Measure AC Voltage 1 - Measure High Voltage AC Current 1 - Source (220 to 750) V (30 to 50) khz 220 V to 1.1 kv (15 to 50) Hz 50 Hz to 1 khz Up to 10 mv (1 to 40) Hz (1 to 20) khz (100 to 300) khz 10 mv to 10 V (1 to 40) Hz (1 to 20) khz (100 to 300) khz 300 khz to 1 MHz (1 to 2) MHz (10 to 100) V (1 to 40) Hz (100 to 300) khz 300 khz to 1 MHz 100 V to 1 kv (1 to 40) Hz (1 to 20) khz (1 to 20) kv 60Hz (1 to 220) μa 220 μa to 22 ma (22 to 220) ma 220 ma to 2.2 A 0.6 mv/v + 11 mv 2.3 mv/v + 45 mv 0.4 mv/v + 16 mv 90 μv/v + 4 mv 0.3 mv/v + 3 μv 0.2 mv/v + 2 μv 0.3 mv/v + 2 μv 1.2 mv/v + 2 μv 5.8 mv/v + 2 μv 46 mv/v + 2 μv 80 μv/v mv 80 μv/v mv 0.2 mv/v mv 0.3 mv/v mv 0.9 mv/v mv 3.5 mv/v + 1 mv 12 mv/v + 1 mv 17 mv/v + 1 mv 0.2 mv/v + 4 mv 0.2 mv/v + 2 mv 0.4 mv/v + 2 mv 1.4 mv/v + 2 mv 4.6 mv/v + 10 mv 17 mv/v + 10 mv 0.5 mv/v + 40 mv 0.5 mv/v + 20 mv 0.7 mv/v + 20 mv 1.4 mv/v + 20 mv 3.5 mv/v + 20 mv 10 mv/v 0.9 ma/a 0.24 ma/a 0.26 ma/a 0.93 ma/a Fluke 5700A Opt 003 HP 3458A, Synchronous Sub-Sampled Mode Vitrek 4600A Fluke 5700A Opt 003 Page 6 of 13

8 Electrical DC/Low Frequency Parameter / AC Current 1 - Source AC Current 1 - Measure Oscilloscope 1 (1 to 1 000) A 60 Hz 5.4 ma/a Up to 100 μa (10 to 20) Hz (20 to 45) Hz 45 Hz to 1 khz 100 μa to 100 ma (10 to 20) Hz (20 to 45) Hz (45 to 100) Hz 100 Hz to 5 khz 100 ma to 1 A (10 to 20) Hz (20 to 45) Hz (45 to 100) Hz 100 Hz to 5 khz 4.6 ma/a μa 1.8 ma/a μa 0.78 ma/a μa 4.6 ma/a + 20 μa 1.7 ma/a + 20 μa 0.73 ma/a + 20 μa 0.42 ma/a + 20 μa 4.6 ma/a ma 1.9 ma/a ma 1 ma/a ma 1.2 ma/a ma Fluke 5500 with Fluke Coil HP 3458A Level Sine Amp 50 khz ref. 5 mv to 5 V (V pp) 20 mv/v mv Level Sine Flatness 5 mv to 5.5 V relative to 50 khz reference Square Wave 1 MΩ, 100 Hz 50 Ω, 1 khz 50 khz to 100 MHz (100 to 300) MHz (300 to 600) MHz 1 mv to ± 130 V ± 1 mv to ± 6.6 V 15 mv/v mv 20 mv/v mv 40 mv/v mv 1 mv/v + 40 µv 2.5 mv/v + 40 µv Fluke 5500A Time Marker Output 2 Into 50 Ω 2 ns to 20 ms 50 ms to 5 s ( t) parts in parts in 10 6 s Pulse Rise Time 5 mv to 2.5 V (p-p) 1 khz to 10 MHz 100 ps Page 7 of 13

9 Electrical - RF/Microwave Parameter / RF Tuned Power - Measure, Connector Type N RF Absolute Power - Source Connector Type N 100 khz to 4.2 GHz 10 MHz to 18 GHz 10 MHz to 18 GHz 10 MHz to 26.5 GHz 10 MHz to 50 GHz RF Power - Measure Amplitude Modulation - Measure 50 Hz to 10 khz 20 Hz to 100 khz (-127 to 0) db Up to 1.3 GHz Up to 18 GHz (-30 to 20) db (-70 to -20) db (-30 to 20) db (-30 to 20) db (-30 to 20) db (-127 to 13) dbm 10 khz to 20 MHz (-110 to 10) dbm 20 MHz to 2 GHz (2 to 20) GHz (20 to 40) GHz (40 to 50) GHz Rate: 150 khz to 10 MHz Depth: (5 to 99) % 0.04 db 0.72 db 0.06 db 0.64 db 0.68 db 0.84 db 1.2 db 1.2 dbm 1.2 dbm 1.3 dbm 1.9 dbm 2.8 dbm 4 % Modulation 4.6 % Modulation HP 8902A, HP 11722A, HP 11793A HP 438A, HP 8902A, HP 11722ª 8482A 8484A 8481A 8485A 8487A HP E4432A HP 83650L 50 Hz to 50 khz 20 Hz to 100 khz Frequency Modulation - Measure 20 Hz to 10 khz Rate: 10 MHz to 1.3 GHz Depth: (5 to 99) % Rate: 250 khz to 10 MHz Dev: 40 khz 3.6 % Modulation 4.6 % Modulation 3.1 % Modulation HP 8902A, HP 11722A 20 Hz to 200 khz 50 Hz to 100 khz Rate: 10 MHz to 1.3 GHz Dev: 400 khz 7.7 % Modulation 1.6 % Modulation Phase Modulation - Measure 200 Hz to 20 khz Rate: 10 MHz to 1.3 GHz 7 % Modulation Page 8 of 13

10 Length Dimensional Metrology Parameter / Calipers 1,2 (0.10 to 8) in (8 to 24) in (24 to 40) in ( L) µin ( L) µin ( L) µin Height Gages 2 (0.10 to 40) in ( L) µin Micrometers 2 Depth Micrometers Indicators 2 Thickness Gage with Indicator Optical Comparators and Visual Systems 1 Length Optical Comparators and Visual Systems 1 Angle Rulers Supermicrometers Length Parallelism Force Measuring (0.10 to 8) in (8 to 24) in Up to 6 in Up to 4.0 in Up to 4.0 in Up to 8 in in to 1 ft (12 to 40.0) in Up to 1 in (0 to 100) μin (0 to 48) ozf ( L) µin ( L) µin (52 + 2L) µin 14 µin ( L) µin 30 µin Gage Blocks, Length Rods, Master Step Gage Gage Blocks, Length Rods Gage Blocks, Rods Set, Optical Parallel Super Micrometer, Master Gage Blocks Glass Scale, Gage Blocks Angle Blocks 311 µin 592 µin 30 µin 15 µin 2 ozf Standard Rule, Optical Comparator Gage Blocks, Optical Parallel, Force Gage Angle Meters Up to Angle Block Thread Plug Gages 2 - Pitch Diameter Major Diameter Cylindrical Plug Gages & Pin Gages Surface Finish Testers Ra Ry Coating Thickness 1,3 - Measuring (0 to 12) in Up to in 3 µm (108 µin) 9.5 µm (374 µin) Up to 100 µm Up to 4 mils (100 to 1 500) µm (4 to 60) mils ( L) µin ( L) µin 60 µin 0.07 µm (2.4 µin) 0.22 µm (2.4 µin) 2.5 µm 0.09 mils 1.5 µm 0.18 mils Supermicrometer, Thread Measuring Wires Supermicrometer, Gages Blocks Roughness Specimen Coating Thickness Standards Page 9 of 13

11 Length Dimensional Metrology Parameter / Feeler and Taper Gages Up to in 20 µin Fixture Gages Radius Gages Surface Plates 2 Repeat Reading Up to 12 in Up to 1 in (12 in x 12 in) to (72 in x 96 in) 300 µin 40 µin Supermicrometer, Master Gage Blocks, Test Indicator Hand Tools, Optical Comparator Repeat-o-Meter Flatness CMM Verification Volumetric Length Up to (74x144 in) Up to 10 in (10 to 20) in (20 to 30) in (30 to 40) in ( L) μin 28µin 37 µin 68 µin 90 µin Wyler Surface Plate Kit Master Step Gage, Master Sphere Mass Parameter / Dynamic 25 ο C (6.2 to ) cp 0.52 % of reading (20 to 30) HRC (35 to 55) HRC (60 to 65) HRC 0.45 HRC 0.40 HRC 0.40 HRC Cannon Viscosity Standards Indirect Verification of Rockwell Hardness Testers 1 (40 to 59) HRBW (60 to 79) HRBW (80 to 100) HRBW (70 to 77) HR15N (78 to 88) HR15N (90 to 92) HR15N 1 HRBW 0.70 HRBW 0.51 HRBW 0.55 HR15N 0.5 HR15N 0.55 HR15N ASTM E18 (20 to 31) HR45N (37 to 61) HR45N (66 to 72) HR45N 0.55 HR45N 0.5 HR45N 0.50 HR45N Page 10 of 13

12 Mass Parameter / Indirect Verification of Rockwell Hardness Testers 1 Indirect Verification of Microindentation Hardness Testers Vickers Vickers: Repeatability under forces P(gf): Hardness Shore Type A, B, C & D Pressure Measure 1 Torque 1 Torque Analyzers, Transducer Force - Tension & Compression Scales & Balances 1 (43 to 56) HR30TW (57 to 69) HR30TW (70 to 83) HR30TW (74 to 80) HR15TW (81 to 86) HR15TW (87 to 93) HR15TW 100 P < 500 (100 to 240) HV (240 to 600) HV > 600 HV 500 P 1000 (100 to 240) HV (240 to 600) HV >600 HV 0.4 HR30TW 0.4 HR30TW 0.45 HR30TW 0.45 HR15TW 0.4 HR15TW 0.4 HR15TW 4 HV 11 HV 22 HV 1.7 HV 3.4 HV 9.1 HV (0 to 100) points 0.3 points (-15 to ) psig (0.001 to 15) psig 15 to psig to psig (0.01 to 400) ozf in (0.1 to 5) lbf in (1.0 to 400) lbf in (20 to 250) lbf ft (250 to 600) lbf ft 1 ozf in to 200 lbf in (16 to 500) lbf ft (0.001 to 200) lbf (1 to 500) lbf (100 to 1 000) lbf 0.1 % of reading 0.1 % of reading 0.1 % of reading 0.1 % of reading 0.83 % of reading 0.92 % of reading 0.7 % of reading 0.66 % of reading 0.68 % of reading 0.3 % of applied load 0.34 % of applied load 0.01 % of reading % of reading 0.05 % of reading ASTM E18 ASTM E384 Gage Blocks, Balance, Weights Fluke 744 with various Pressure Modules CDI Torque System Torque Wheel and Weights Verification with Class F Weights (100 to ) lbf % of reading Load Cell Comparison Up to 200 g Up to g Up to g Up to 20 kg 0.13 mg 1.4 mg 16 mg 26 mg (20 to 1 000) kg % of reading NOM-10-SCFI-1994 using Class 1 Weights NOM-10-SCFI-1994 using Class F Weights Page 11 of 13

13 Mass Parameter / Flow Air (30 to 5 000) ml/min (2 000 to 9 500) ml/min (5 000 to ) ml/min 1.3 % of reading 2.2 % of reading 1.7 % of reading Bios Flow System with Flow Cells Photometry and Radiometry Parameter / Fiber Optics - Measure nm nm (-110 to 10) db (-110 to 10) db 4.6 % of reading 4.6 % of reading EXFO Optical Calibration System Thermodynamic Parameter / Humidity - Source 11 %RH 33 %RH 75.4 %RH 97 %RH 1.6 %RH 1.7 %RH 1.5 %RH 2 %RH Saturated Salt Solutions Temperature - Source (0 to 300) C 0.17 C Hart 9100 Temperature - Measure (-20 to 200) C 0.06 C DP 97 Infrared Thermometers 35 ºC 100 ºC 200 ºC 350 ºC 500 ºC 0.4 C 0.6 C 1 ºC 1.1 ºC 1.6 ºC Precision Infrared Calibrator Time and Frequency Parameter / Photo Tachometer 1 (1 to 5 000) rpm (5 000 to ) rpm 1 rpm 0.05 % of reading +1 rpm Fluke 5520A with LED and Series Resistor Page 12 of 13

14 Time and Frequency Parameter / Frequency 1 - Source and Measure Frequency Source 2 Frequency Source 2 Timers, Stopwatches, Chronometers 1 mhz to 26.5 GHz 2.5 parts in (0.01 to 120) Hz 120 Hz to 1.2 khz (1.2 to 120) khz 120 khz to 1.2 MHz (1.2 to 2) MHz 2 MHz to 6 GHz 10 MHz to 26.5 GHz 3 μhz/hz + 61 μhz 3 μhz/hz + 61 μhz 3 μhz/hz μhz 3 μhz/hz + 10 mhz 3 μhz/hz + 12 mhz 1.3 μhz/hz Hz (1.2 x 10-7) Hz + R Efraton MRT-HT, EIP 548A, GPS HP 3801A Fluke 5520A HP E4432A HP 83650L Up to 24 hr 0.09 s Frequency Counter DIMENSIONAL MEASUREMENT Dimensional Specific Tests and / or Properties Measured Coordinate Measurements 2 3-Axis Volumetric and Linear Displacement. Fixtures and Part Measurements 94.5 in ( L) μin Faro CM Arm Calibration and Measurement Capability (CMC) is expressed in terms of the measurement parameter, measurement range, expanded uncertainty of measurement and reference standard, method, and/or equipment. The expanded uncertainty of measurement is expressed as the standard uncertainty of the measurement multiplied by a coverage factor of 2 (k=2), corresponding to a confidence level of approximately 95%. Notes: 1. On-site calibration service is available for this parameter, since on-site conditions are typically more variable than those in the laboratory, larger measurement uncertainties are expected on-site than what is reported on the accredited scope. 2. L = length in inches, t = time in seconds, R = resolution of unit under test 3. 1 mil = inch. 4. This scope is formatted as part of a single document including Certificate of Accreditation No. AC Page 13 of 13