IAS Accreditation Number Accredited Entity Address CL-140 8501 East Pleasant Valley Road Independence, Ohio 44131 Matt Meyer (216) 524-4990 x88235 Contact Name Telephone Effective Date of Scope October 29, 2018 Accreditation Standard ISO/IEC 17025:2005 AND MEASUREMENT CAPABILITY (CMC) 1,2 TECHNIQUE, REFERENCE STANDARD, Gas Flow Rate Water Flow Rate Pressure Gages 0 SCFH to 2.12 SCFH 2.12 SCFH to 21.2 SCFH 15.3 SCFH to 106 SCFH 30.5 SCFH to 212 SCFH 50.9 SCFH to 509 SCFH 0.5 USGPM to 4 USGPM 3 USGPM to 15 USGPM 15 USGPM to 100 USGPM 0 inh 2 O to 200 inh 2 O 4 inh 2 O to 416 inh 2 O 5 psi to 15000 psi Mechanical 0.0027 SCFH 0.13 % 0.13 % 0.088 % 0.13 % 0.11 % 0.11 % 0.50 % 0.058 % + 1 count 0.058 % 0.12 % Lab Standard VS-10 and VS-10.3 Lab Standard VS-10 and VS-10.3 Lab Standard VS-10 and VS-10.1 Lab Standard VS-10, VS- 10.1 and VS-10.2 Lab Standard VS-10 and VS-10.4 Lab Standard VS-20 Lab Standard VS-21 Lab Standard VS-22 Lab Standard PS-3 Lab Standard PS-2 Lab Standard PS-1-100.000 inh 2 O to -0.001 inh 2 O 0.000 inh 2 O to 10.000 inh 2 O 10.001 inh 2 O to 100 inh 2 O -15.000 psi to -0.001 psi 0.000 psi to 125 psi 125.001 psi to 500 psi 0.21 inh 2 O 0.0075 % + 0.005 inh 2 O 0.009 % 0.0075 psi 0.0075 % + 0.0063 psi 0.009 % Fluke 7252i Fluke 7252i Fluke 7252i Force 5 lbf 0.065 lbf WS-2 5 lb weight WS-63 Scale International Accreditation Service, Inc. 3060 Saturn Street, Suite 100, Brea, California 92821 U.S.A Telephone +1 562-364-8201 IASInfo@iasonline.org www.iasonline.org Page 1 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 Resistance Thermometry Thermocouple Indicators Type J -100 ºC to 0 ºC 0 ºC to 420 ºC -200 ºC to 0 ºC 0 ºC to 1200 ºC Thermal 59 ppm + 0.012 ºC 53 ppm + 0.012 ºC 0.55 ºC 0.30 ºC Lab Standard TS-11 and TS-07 Lab Standard TS-1 and TS-09 Type T -200 ºC to 0 ºC 0 ºC to 400 ºC 0.75 ºC 0.30 ºC Type K Gaseous fuel heating value -250 ºC to 0 ºC 0 ºC to 1370 ºC Chemical 800 BTU/SCF to 1600 BTU/SCF 1600 BTU/SCF to 3200 BTU/SCF 2000 BTU/SCF to 3800 BTU/SCF 2.5 ºC 0.45 ºC 1.17 BTU/SCF 1.90 BTU/SCF 2.28 BTU/SCF Calorimeter 900 BTU/SCF to 1100 BTU/SCF 1.18 BTU/SCF Gas Chromatograph Flue Gas Analysis CO CO 2 NO x DC Voltage Source DC Current Source 1 ppm to 5000 ppm 0.1 % to 25 % 1 ppm to 500 ppm 0.67 % 0.67 % 0.67 % Electrical (DC/Low Frequency) 0 mv to 329.9999 mv 0 V to 3.299999 V 0 V to 32.99999 V 30 V to 329.9999 V 100 V to 1020.000 V 0 μa to 329.999 μa 0 ma to 3.29999 ma 0 ma to 32.9999 ma 0 ma to 329.999 ma 0 ma to 1.09999 A 1.1 A to 2.99999 A 16 µv/v + 1 µv 9 µv/v + 2 µv 9 µv/v + 16 µv 14 µv/v + 0.12 mv 14 µv/v + 1.2 mv 120 µa/a + 0.02 µa 78 µa/a + 0.04 µa 78 µa/a + 0.19 µa 78 µa/a + 1.9 µa 160 µa/a + 31 µa 300 µa/a + 31 µa Compressed Gas Calibration Gases: Reference material (EPA Protocol Grade) 0 to 10.9999 A 11 A to 20.5 A 390 µa/a + 0.39 ma 780 µa/a + 0.58 ma (20 A range) CL-140 Page 2 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 DC Resistance Source 0 Ω to 10.9999 Ω 11 Ω to 32.9999 Ω 33 Ω to 109.9999 Ω 110 Ω to 329.9999 Ω 330 Ω to 1.099999 kω 1.1 kω to 3.299999 kω 3.3 kω to 10.99999 kω 11 kω to 32.99999 kω 33 kω to 109.9999 kω 110 kω to 329.9999 kω 330 kω to 1.099999 MΩ 1.1 MΩ to 3.299999 MΩ 3.3 MΩ to 10.99999 MΩ 11 MΩ to 32.99999 MΩ 33 MΩ to 109.9999 MΩ 110 MΩ to 329.9999 MΩ 330 MΩ to 1100 MΩ 1.0 mv to 32.999 mv (10 Hz to 45 Hz) (45 Hz to 10 khz) (10 khz to 20 khz) (100 khz to 500 khz) 31 µω/ω + 0.01 Ω 23 µω/ω + 0.012 Ω 22 µω/ω + 0.012 Ω 22 µω/ω + 0.02 Ω 22 µω/ω + 0.02 Ω 22 µω/ω + 0.2 Ω 22 µω/ω + 0.1 Ω 22 µω/ω + 1 Ω 22 µω/ω + 1 Ω 25 µω/ω + 8 Ω 25 µω/ω + 8 Ω 47 µω/ω + 0.12 kω 100 µω/ω + 0.19 kω 190 µω/ω + 1.9 kω 390 µω/ω + 2.3 kω 0.23 % + 7.8 kω 1.2 % + 0.39 MΩ AC Voltage Source (Sine Wave) 620 µv/v + 5 µv 120 µv/v + 5 µv 160 µv/v + 5 µv 780 µv/v + 5 µv 0.27 % + 9 µv 0.62 % + 39 µv (normal output) 33 mv to 329.999 mv (10 Hz to 45 Hz) (45 Hz to 10 khz) (10 khz to 20 khz)) (100 khz to 500 khz) 23 µv/v + 6 µv 110 µv/v + 6 µv 120 µv/v + 6 µv 270 µv/v + 6 µv 620 µv/v + 25 µv 0.16 % + 54 µv 0.33 V to 3.29999 V (10 Hz to 45 Hz) (45 Hz to 10 khz) (10 khz to 20 khz) (100 khz to 500 khz) 230 µv/v + 39 µv 120 µv/v + 47 µv 150 µv/v + 47 µv 230 µv/v + 39 µv 540 µv/v + 97 µv 0.19 % + 0.47 mv 3.3 V to 32.9999 V (10 Hz to 45 Hz) (45 Hz to 10 khz) (10 khz to 20 khz) 230 µv/v + 0.50 mv 120 µv/v + 0.47 mv 190 µv/v + 0.47 mv 270 µv/v + 0.47 mv 700 µv/v + 1.2 mv CL-140 Page 3 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 AC Voltage Source (Sine Wave) cont. 33 V to 329.999 V (10 Hz to 45 Hz) (45 Hz to 10 khz) (10 khz to 20 khz) 150 µv/v + 1.6 mv 160 µv/v + 4.7 mv 190 µv/v + 4.7 mv 230 µv/v + 4.7 mv 0.16 % + 39 mv (normal output) 330 V to 1020 V 230 µv/v + 7.8 mv 190 µv/v + 7.8 mv 230 µv/v + 7.8 mv 10 mv to 329.999 mv (10 khz to 30 khz) 0.2 µv/v + 290 µv 0.1 µv/v + 290 µv 0.1 µv/v + 290 µv 0.2 µv/v + 350 µv 0.3 µv/v + 350 µv 3.9 µv/v + 700 µv (auxiliary output) 0.33 V to 3.29999 V (10 khz to 30 khz) 0.2 µv/v + 350 µv 0.1 µv/v + 350 µv 0.07 µv/v + 350 µv 0.2 µv/v + 1.1 mv 0.3 µv/v + 1.1 mv 3.9 µv/v + 2.2 mv 3.3 V to 5 V 0.2 µv/v + 350 µv 0.1 µv/v + 350 µv 0.07 µv/v + 350 µv 0.2 µv/v + 1.1 mv 0.3 µv/v + 1.1 mv CL-140 Page 4 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 AC Current Source (Sine Wave) 29.00 µa to 329.99 µa (10 khz to 30 khz) 0.2 µa/a + 0.1 µa 0.12 µa/a + 0.1 µa 0.097 µa/a + 0.1 µa 0.2 µa/a + 0.12 µa 0.6 µa/a + 0.2 µa 1.2 µa/a + 0.3 µa (Inductive Compensation Off) 0.33 ma to 3.29999 ma (10 khz to 30 khz) 0.2 µa/a + 0.12 µa 0.097 µa/a + 0.12 µa 0.1 µa/a + 0.12 µa 0.2 µa/a + 0.2 µa 0.4 µa/a + 0.2 µa 0.8 µa/a + 0.5 µa 3.3 ma to 32.9999 ma (10 khz to 30 khz) 0.14 µa/a + 2 µa 0.07 µa/a + 2 µa 0.03 µa/a + 2 µa 0.06 µa/a + 2 µa 0.2 µa/a + 2 µa 0.3 µa/a + 3 µa 33 ma to 329.999 ma (10 khz to 30 khz) 0.14 µa/a + 16 µa 0.07 µa/a + 16 µa 0.03 µa/a + 16 µa 0.08 µa/a + 39 µa 0.2 µa/a + 78 µa 0.3 µa/a + 160 µa 0.33 A to 1.09999 A (10 Hz to 45 Hz) 0.14 µa/a + 78 µa 0.04 µa/a + 78 µa 0.5 µa/a + 780 µa 1.9 µa/a + 3.9 ma 1.1 A to 2.99999 A (10 to 45 Hz) (1 to 5 khz) (5 to 10 khz) 0.14 µa/a + 78 µa 0.04 µa/a + 78 µa 0.5 µa/a + 780 µa 1.9 µa/a + 3.9 ma 3 A to 10.9999 A (45 Hz to 100 Hz) 0.05 µa/a + 1.6 ma 0.08 µa/a + 1.6 ma 2.3 µa/a + 1.6 ma CL-140 Page 5 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 AC Current Source (Sine Wave) cont. 11 A to 20.5 A (45 Hz to 100 Hz) 0.09 µa/a + 3.9 ma 0.12 µa/a + 3.9 ma 2.3 µa/a + 3.9 ma (Inductive Compensation Off) 29.00 µa to 329.99 µa (10 Hz to 100 Hz) 0.19 µa/a + 0 µa 0.5 µa/a + 0 µa (Inductive Compensation On) 0.33 ma to 3.29999 ma (10 Hz to 100 Hz) 0.19 µa/a + 0 µa 0.5 µa/a + 1 µa 3.3 ma to 32.9999 ma (10 Hz to 100 Hz) 0.06 µa/a + 3 µa 0.2 µa/a + 8 µa 33 ma to 329.999 ma (10 Hz to 100 Hz) 0.06 µa/a + 31 µa 0.2 µa/a + 78 µa 0.33 A to 2.99999 A (10 Hz to 100 Hz) (100 Hz to 440 Hz) 0.09 µa/a + 160 µa 0.2 µa/a + 780 µa Capacitance Source 3 A to 20.5 A (10 Hz to 100 Hz) 220 pf to 399.9 pf 0.4 nf to 1.0999 nf 1.1 nf to 3.2999 nf 3.3 nf to 10.9999 nf 11 nf to 32.9999 nf 33 nf to 109.999 nf 110 nf to 329.999 nf 0.33 µf to 1.09999 µf 1.1 µf to 3.29999 µf 3.3 µf to 10.9999 µf 11 µf to 32.9999 µf 33 µf to 109.999 µf 110 µf to 329.999 µf 0.33 mf to 1.09999 mf 1.1 mf to 3.29999 mf 3.3 mf to 10.9999 mf 11 mf to 32.9999 mf 33 mf to 110 mf 0.09 µa/a + 1.6 ma 0.8 µa/a + 3.9 ma 0.4 pf + 8 pf 0.4 pf + 0.01 nf 0.4 nf + 0.01 nf 0.19 nf + 0.01 nf 0.19 nf + 0.01 nf 0.19 nf + 0.01 nf 0.19 nf + 0.02 nf 0.19 nf + 1 nf 0.19 nf + 2 nf 0.19 nf + 8 nf 0.31 nf + 23 nf 0.35 nf + 78 nf 0.35 nf + 230 nf 0.35 µf + 1 µf 0.35 µf + 2 µf 0.35 µf + 8 µf 0.58 µf + 23 µf 0.9 µf + 78 µf CL-140 Page 6 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 DC Power Source 33 mv to 1020 V (0.33 ma to 329.99 ma) (0.33 A to 2.9999 A) (3 A to 20.5 A) AC Power Source (45 Hz to 65 Hz) 33 mv to 329.999 mv (3.3 ma to 8.999 ma) (9 ma to 32.999 ma) (33 ma to 89.99 ma) (90 ma to 329.99 ma) 330 mv to 1020 V (3.3 ma to 8.999 ma) (9 ma to 32.999 ma) (33 ma to 89.99 ma) (90 ma to 329.99 ma) 33 mv to 329.999 mv (0.33 A to 0.8999 A) (0.9 A to 2.1999 A) (2.2 A to 4.4999 A) (4.5 A to 20.5 A) 330 mv to 1020 V (0.33 A to 0.8999 A) (0.9 A to 2.1999 A) (2.2 A to 4.4999 A) (4.5 A to 20.5 A) % Watts output 0.018 0.017 0.05 % Watts output 0.11 0.08 0.11 0.08 0.09 0.06 0.09 0.06 0.1 0.09 0.10 0.09 0.09 0.07 0.09 0.08 CL-140 Page 7 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 Simulated Temperature Calibration (Thermocouple) TC Type B 600 ºC to 800 ºC 800 ºC to 1000 ºC 1000 ºC to 1550 ºC 1550 ºC to 1820 ºC 0.34 ºC 0.26 ºC 0.23 ºC 0.26 ºC TC Type C 0 ºC to 150 ºC 150 ºC to 650 ºC 650 ºC to 1000 ºC 1000 ºC to 1800 ºC 1800 ºC to 2316 ºC 0.23 ºC 0.20 ºC 0.24 ºC 0.39 ºC 0.65 ºC TC Type E -250 ºC to -100 ºC -100 ºC to -25 ºC -25 ºC to 350 ºC 350 ºC to 650 ºC 650 ºC to 1000 ºC 0.39 ºC 0.12 ºC 0.11 ºC 0.12 ºC 0.16 ºC TC Type J -210 ºC to -100 ºC -100 ºC to -30 ºC -30 ºC to 150 ºC 150 ºC to 760 ºC 760 ºC to 1200 ºC 0.21 ºC 0.12 ºC 0.11 ºC 0.13 ºC 0.18 ºC TC Type K -200 ºC to -100 ºC -100 ºC to -25 ºC -25 ºC to 120 ºC 120 ºC to 1000 ºC 1000 ºC to 1372 ºC 0.26 ºC 0.14 ºC 0.12 ºC 0.20 ºC 0.31 ºC TC Type L -200 ºC to -100 ºC -100 ºC to 800 ºC 800 ºC to 900 ºC 0.29 ºC 0.20 ºC 0.13 ºC TC Type N -200 ºC to -100 ºC -100 ºC to -25 ºC -25 ºC to 120 ºC 120 ºC to 410 ºC 410 ºC to 1300 ºC 0.31 ºC 0.17 ºC 0.15 ºC 0.14 ºC 0.21 ºC TC Type R 0 ºC to 250 ºC 250 ºC to 400 ºC 400 ºC to 1000 ºC 1000 ºC to 1767 ºC 0.44 ºC 0.27 ºC 0.26 ºC 0.31 ºC CL-140 Page 8 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 TC Type S 0 ºC to 250 ºC 250 ºC to 1000 ºC 1000 ºC to 1400 ºC 1400 ºC to 1767 ºC 0.36 ºC 0.28 ºC 0.29 ºC 0.36 ºC TC Type T -250 ºC to -150 ºC -150 ºC to 0 ºC 0 ºC to 120 ºC 120 ºC to 400 ºC 0.49 ºC 0.19 ºC 0.12 ºC 0.11 ºC TC Type U -200 ºC to 0 ºC 0 ºC to 600 ºC 0.43 ºC 0.21 ºC RTD Type Pt 385, 100Ω -200 ºC to -80 ºC 100 ºC to 300 ºC 300 ºC to 400 ºC 400 ºC to 630 ºC 630 ºC to 800 ºC 0.07 ºC 0.08 ºC 0.09 ºC 0.18 ºC Pt 3926, 100Ω -200 ºC to -80 ºC 100 ºC to 300 ºC 300 ºC to 400 ºC 400 ºC to 630 ºC 0.07 ºC 0.08 ºC 0.09 ºC Pt 3916, 100Ω -200 ºC to -190 ºC -190 ºC to -80 ºC 100 ºC to 260 ºC 260 ºC to 300 ºC 300 ºC to 400 ºC 400 ºC to 600 ºC 600 ºC to 630 ºC 0.19 ºC 0.03 ºC 0.06 ºC 0.07 ºC 0.08 ºC 0.18 ºC Pt 385, 200 Ω -200 ºC to -80 ºC 100 ºC to 260 ºC 260 ºC to 300 ºC 300 ºC to 400 ºC 400 ºC to 600 ºC 600 ºC to 630 ºC 0.03 ºC 0.03 ºC 0.03 ºC 0.09 ºC 0.10 ºC 0.11 ºC 0.12 ºC CL-140 Page 9 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 Pt 385, 500 Ω -200 ºC to -80 ºC 100 ºC to 260 ºC 260 ºC to 300 ºC 300 ºC to 400 ºC 400 ºC to 600 ºC 600 ºC to 630 ºC 0.03 ºC 0.06 ºC 0.06 ºC 0.07 ºC 0.09 ºC Pt 385, 1000 Ω -200 ºC to -80 ºC 100 ºC to 260 ºC 260 ºC to 300 ºC 300 ºC to 400 ºC 400 ºC to 600 ºC 600 ºC to 630 ºC 0.02 ºC 0.02 ºC 0.03 ºC 0.18 ºC PtNi 385, 120 Ω (Ni120) 100 ºC to 260 ºC 0.06 ºC 0.06 ºC 0.11 ºC Cu 427, 10 Ω -100 ºC to 260 ºC 0.23 ºC DC Voltage AC Voltage 0 mv to 100 mv 100 mv to 1 V 1 V to 10 V 10 V to 100 V 100 V to 1000 V 0 mv to 100 mv (10 Hz to 20 khz) (100 khz to 300 khz) 0.0029 % + 2.7 µv 0.0019 %+ 5.4 µv 0.0019 %+ 39 µv 0.0029 %+ 470 µv 0.0032 % + 7.8 mv 0.78 % + 31 µv 0.27 % + 31 µv 0.05 % + 31 µv 0.09 % + 39 µv 0.47 % + 62 µv 3.1 % + 0.39 mv 100 mv to 1 V (10 Hz to 20 khz) (100 khz to 300 khz) 0.78 % + 0.23 mv 0.27 % + 0.23 mv 0.05 % + 0.23 mv 0.09 % + 0.39 mv 0.47 % + 0.62 mv 3.1 % + 3.9 mv CL-140 Page 10 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 AC Voltage cont. 1 V to 10 V (10 Hz to 20 khz) (100 khz to 300 khz) 0.78 % + 2.3 mv 0.27 % + 2.3 mv 0.05 % + 2.3 mv 0.09 % + 3.9 mv 0.47 % + 6.2 mv 3.1 % + 39 mv 10 V to 100 V (10 Hz to 20 khz) (100 khz to 300 khz) 0.78 % + 23 mv 0.27 % + 23 mv 0.05 % + 23 mv 0.09 % + 39 mv 0.47 % + 62 mv 3.1 % + 0.39 V DC Resistance DC Current 100 V to 1000 V (10 Hz to 20 khz) (100 khz to 300 khz) 0 Ω to 10 Ω 10 Ω to 100 Ω 100 Ω to 1 kω 1 kω to 10 kω 10 kω 100 kω 100 kω to 1 MΩ 1 MΩ to 10 MΩ 10 MΩ to 100 MΩ 100 MΩ to 1 GΩ 0 μa to 100 μa 100 μa to 1 ma 1 ma to 10 ma 10 ma to 100 ma 100 ma to 400 ma 400 ma to 1 A 1 A to 3 A 3 A to 10 A 0.78 % + 0.17 V 0.27 % + 0.17 V 0.05 % + 0.17 V 0.09 % + 0.29 V 0.47 % + 0.47 V 3.1 % + 2.9 V 0.0078 % + 2.3 mω 0.0078 % + 3.1 mω 0.0078 % + 7.8 mω 0.0078 % + 78 mω 0.0078 % + 0.78 Ω 0.0078 % + 7.8 Ω 0.031 % + 78 Ω 0.62 % + 7.8 kω 1.6 % + 78 kω 0.039 % + 19 na 0.039 % + 39 na 0.039 % + 1.6 µa 0.039 % + 3.9 µa 0.039 % + 16 µa 0.039 % + 0.16 ma 0.078 % + 0.47 ma 0.12 % + 0.62 ma CL-140 Page 11 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 AC Current 0 μa to 100 μa 0.85 % + 47 na 0.27 % + 47 na 0.12 % + 47 na 0.27 % + 0.54 µa 100 μa to 1 ma 0.78 % + 0.31 µa 0.23 % + 0.31 µa 0.08 % + 0.31 µa 0.16 % + 1.9 µa 1 ma to 10 ma 0.85 % + 4.7 µa 0.27 % + 4.7 µa 0.12 % + 4.7 µa 0.27 % + 54 µa 10 ma to 100 ma 0.78 % + 31 µa 0.23 % + 31 µa 0.08 % + 31 µa 0.16 % + 0.19 ma 100 ma to 400 ma 0.78 % + 0.31 ma 0.23 % + 0.31 ma 0.08 % + 0.31 ma 0.16 % + 2.2 ma 400 ma to 1 A 0.78 % + 0.31 ma 0.23 % + 0.31 ma 0.08 % + 0.31 ma 0.27 % + 5.4 ma 1 A to 3 A 0.85 % + 1.4 ma 0.27 % + 1.4 ma 0.12 % + 1.4 ma 0.27 % + 16 ma 3 A to 10 A 0.85 % + 4.7 ma 0.27 % + 4.7 ma 0.12 % + 4.7 ma 0.27 % + 54 ma CL-140 Page 12 of 13
AND MEASUREMENT CAPABILITY (CMC) 1,2 Capacitance Time ment Frequency 0 nf to 1 nf 1 nf to 10 nf 10 nf to 100 nf 100 nf to 1 μf 1 μf to 10 μf 10 μf to 100 μf 100 μf to 1 mf 1 mf to 10 mf 10 mf to 100 mf 1.6 % + 19 pf 0.78 % + 39 pf 0.78 % + 0.39 nf 0.78 % + 3.9 nf 0.78 % + 39 nf 0.78 % + 0.39 µf 0.78 % + 3.9 µf 0.78 % + 39 µf 3.1 % + 0.16 mf Time/Frequency 28 h 0.63 s U.S. Naval Observatory Clock 3 Hz to 5 Hz 0.078 % 5 Hz to 10 Hz 0.039 % 10 Hz to 40 Hz 0.023 % 40 Hz to 300 khz 0.0078 % 300 khz to 1 MHz 0.0078 % 1 The uncertainty covered by the Calibration and ment Uncertainty (CMC) is expressed as the expanded uncertainty having a specific coverage probability of approximately 95 %. It is the smallest measurement uncertainty 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. The actual measurement uncertainty of a specific calibration performed by the laboratory may be greater than that provided in the CMC due to the behavior of the customer s device and to influences from the circumstances of the specific calibration. 2 If information in this CMC is presented in non-si units, the conversion factors stated in NIST Special Publication 811 Guide for the Use of the International System of Units (SI) apply. 3 When uncertainty is stated in relative terms (such as percent, a multiplier expressed as a decimal fraction or in scientific notation), it is in relation to instrument reading or instrument output, as appropriate, unless otherwise indicated. ppm = parts per million SCFM = standard cubic feet per minute SCFH = standard cubic feet per hour USGPM = US gallon per minute BTU/SCF = British Thermal Unit per Standard Cubic Foot CL-140 Page 13 of 13