CLAS Certificate Number 2000-03

Transcat Canada - Burlington

916 Gateway
Burlington, Ontario
Canada L7L 5K7

Contact

Robert Whittaker
Tel: 905-632-5869
Toll Free: 1-800-897-0067
Fax: 905-632-3741
Email: Robert.Whittaker@transcat.ca
Website: www.Transcat.ca

Clients served

  • All interested parties.
  • On-site calibration services are available for Type III calibration capabilities and those Type II capabilities specifically indicated in the remarks column.

Field(s) of Calibration

Dimensional, mechanical and electrical (dc and low frequency)

SCC Accreditation: (ISO/IEC 17025)

  • Accredited Laboratory 22
  • First issued
  • Issue 8.4e

This scope of calibration capabilities is published by the CLAS program of the National Research Council of Canada (NRC) in close co-operation with the laboratory accreditation program of the Standards Council of Canada (SCC), Canada's accreditation body for calibration and testing laboratories. The SCC accredits the capability of the named laboratory for being able to perform the listed calibrations at the given Calibration Measurement Capability (see Supplementary note C and note D) with traceability to the International System of Units (SI) or to standards acceptable to the CLAS program.

Measured Quantity & Range or Instrument CMC expressed as an Uncertainty Type Remarks
Gauge Block, length: Steel, Rectangular and Square
Inch, up to 4 inches ± ( 0.5 + 1.85L ) µinch or ± 2.5 µinch, whichever greater (Note: L in inches) I See notes 1, 2 and 5 a)
Inch, 5 to 20 inches ± ( 1.5 + 1.3L ) µinch (Note: L in inches)
Metric, up to 100 mm ± ( 0.013 + 0.002L ) µm or ± 0.064 µm, whichever greater (Note: L in mm)
Metric, 125 to 500 mm ± ( 0.16 + 0.001L ) µm (Note: L in mm)
Variation in length of gauge blocks (parallelism): ± 1 µinch or ± 0.025 µm See note 3
Optical Flatness
Measurement of optical flatness of gauge blocks and 4 inch diameter optical flats ± 3 µinch II See note 4
Ring gauge cylindrical, diameter:
Inch, up to 12 inches ± ( 5 + 5.2L ) µin (Note: L in inches) I See notes 2, 5 b) and 6
Metric, up to 305 mm ± ( 0.12 + 0.0052L ) µm (Note: L in mm)
Plug gauge cylindrical, diameter:
Inch, up to 12 inches ± ( 5 + 5.2L ) µin (Note: L in inches) I See notes 2, 5 c) and 6
Metric, up to 305 mm ± ( 0.12 + 0.0052L ) µm (Note: L in mm)
Thread wire, diameter:
Inch, up to 1 inch ± 10 µin I See notes 2 and 5 d)
Metric, up to 25 mm ± 0.25 µm
Caliper: Outside
Inch, up to 12 inches ± 310 µin II
III
See notes 2 and 5 e)
Inch, over 12 to 24 inches ± 450 µin
Inch, over 24 to 40 inches ± 640 µin
Metric, up to 300 mm ± 8 µm
Metric, from 300 to 600 mm ± 12 µm
Metric, from 600 to 1000 mm ± 16 µm
Caliper: Inside
Inch, up to 12 inches ± 310 µin II
III
See notes 2 and 5 e)
Metric, up to 300 mm ± 8 µm
Caliper: Depth
Inch, up to 12 inches ± 330 µin II
III
See notes 2 and 5 e)
Metric, up to 300 mm ± 9 µm
Dial and Test Indicators:
Inch, 0.001 inch resolution ± 140 µin II
III
See notes 2 and 5 f)
Inch, 0.0001 inch resolution ± 48 µin
Inch, 0.00002 inch resolution ± 16 µin
Metric, 0.02 mm resolution ± 4 µm
Metric, 0.002 mm resolution ± 1.2 µm
Metric, 0.0005 mm resolution ± 0.4 µm
Micrometers: Outside
Inch, up to 6 in ± ( 34 + 3.1L ) µin (Note: L in inches) II
III
See notes 2 and 5 g)
Over 6 to 36 in ± ( 50 + 7L ) µin (Note: L in inches)
Metric, up to 150 mm ± ( 0.86 + 0.0031L ) µm (Note: L in mm)
Over 150 to 900 mm ± ( 1.27 + 0.007L ) µm (Note: L in mm)
Micrometers: Inside
Inch, head travel of 1 in ± 60 µin II
III
See notes 2 and 5 g)
Inch, up to 36 in ± ( 40 + 6L ) µin (Note: L in inches)
Metric, head travel of 25.4 mm ± 1.5 µm
Metric, up to 900 mm ± ( 1.0 + 0.006L ) µm (Note: L in mm)
Caliper: Inside
Spindle displacement:
up to 1 inch ± 10 µinch II See notes 2
up to 25.4 mm ± 0.26 µm
Optical comparator:
lens magnification < 0.1 % III
horizontal encoder with digital readout ± 100 µin
horizontal encoder with digital readout ± 100 µin
angle ± 2.2 minutes of arc
Micrometer setting standards:
Inch, up to 36 inches ± ( 30 + 4L ) µin (Note: L in inches) II See notes 2, 5 g)
over 36 up to 80 inches ± ( 200 + 5L ) µin (Note: L in inches)
Metric, up to 900 mm ± ( 0.8 + 0.004L ) µm (Note: L in mm)
over 900 up to 2000 mm ± ( 5 + 0.005L ) µm (Note: L in mm)
Rules, measuring
Inch, length up to 48 inches ± ( 30 + 8L ) µin (Note: L in inches) II See notes 2 and 5 h)
Metric, length up to 1000 mm ± ( 0.8 + 0.008L ) µm (Note: L in mm)
Torque transducers: Clockwise and counter clockwise
50 lb•in to 250 lb•ft ± 0.25 % of reading II See notes 2 and 5 i)
5.65 N•m to 339 N•m ± 0.25 % of reading
Torque wrenches & screwdrivers: Clockwise and counter clockwise
50 lb•in to 250 lb•ft ± 0.5 % of reading II
III
See notes 2 and 5 i)
5.65 N•m to 339 N•m ± 0.5 % of reading
Surface Plate Flatness
up to 20 foot diagonal ± (43+2D) µinch, where, D is the length of the diagonal in inches. III See note 5 j)
Thread plug gauge and thread setting plug gauge, 60 degree:
Pitch diameter (measured over thread wires)
Inch, up to 1.5 inches ± 100 µin II See notes 2,5 k) and 7
over 1.5 up to 6 inches ± 200 µin
over 6 up to 12 inches ± 300 µin
Metric, up to 35 mm ± 2.5 µm
over 35 up to 150 mm ± 5.1 µm
over 150 up to 300 mm ± 7.6 µm
Major diameter
Inch, up to 12 inches ± ( 10 + 6L ) µin (Note: L in inches) II See notes 2,5 k) and 7
Metric, to 300 mm ± ( 0.25 + 0.006L ) µm (Note: L in 'millimetres')
Thread ring gauge, solid, 60 degree parallel:
Pitch diameter (measured over balls)
Inch, up to 5.5 inches ± 90 µin II See notes 2,5 k) and 7
Metric, up to 139 mm ± 2.3 µm
Thread ring gauge, adjustable, 60 degree parallel:
  • Set to thread setting plug
    • Inch, up to 12 inches
    • Metric, up to 305 mm
The adjustable thread ring gauge is set to the functional diameter of the thread setting plug. II See notes 2,5 k)
Pressure, Gauges, Controllers, & Transducers See Note 1
Gauge, Pneumatic
Pressure Range (-17, 0.5, 1.0, 10.0, 15.0 30.0, 100.0, 50.0, 250.0, 500,0, 750,0 1,500) psig ± 0.01 % of Full Scale for each range II & III Mensor APC 600 Multiple-Range Pressure Controller
Pressure Range -100 to 10,000 kPa ± 0.01 % of Full Scale for each range II & III
0 to 4,500 psig ± 0.01 % of Full Scale II & III Mensor 2106-4.5k
0 to 31,000 kPa ± 0.01 % of Full Scale II & III Pressure Gauge
Gauge, Hydraulic
100 to 16,000 psig ± 0.025 % of Reading I Budenberg 580HXA Pressure Balance
0 to 4,500 psig ± 0.01 % of Full Scale I & II Mensor 2106-4.5k
0 to 31,000 kPa ± 0.01 % of Full Scale I & II Pressure Gauge
Absolute, Pneumatic
Pressure Ranges (0.5, 1.0, 10.0, 15.0,30.0, 50.0, 100,250.0, 500,0, 750,0 1,500) psia ± 0.01 % of Full Scale for each range II & III Mensor APC 600 Multiple-Range Pressure Controller
Pressure Range 0 to 70,000 kPa ± 0.01 % of Full Scale for each range II & III
Barometric Range 758 to 1172 hPa ± 0.01 % of Reading II & III Mensor APC 600 Pressure Controller Barometric Reference
HARDNESS
Indirect verification of Rockwell Hardness Testers:
HRA, HRBW, HRC, HREW Governed by the uncertainty of the standardized test block used to perform the indirect verification II & III ASTM E18
Standardized Test Blocks per ASTM E18 See notes 9 & 10
Indirect verification of Rockwell Superficial Hardness Testers:
HR15N, HR15TW, HR15YW Governed by the uncertainty of the standardized test block used to perform the indirect verification II & III ASTM E18
Standardized Test Blocks per ASTM E18 See notes 9 & 10
HR30N, HR30TW
HR45N, HR45TW
Indirect verification of Brinell Hardness Testers:
HBW Governed by the uncertainty of the standardized test block used to perform the indirect verification II & III ASTM E10
Standardized Test Blocks per ASTM E10 See notes 9 & 11
Indirect verification of Vickers Micro Indentation Hardness Testers:
HV Governed by the uncertainty of the standardized test block used to perform the indirect verification II & III ASTM E384
Standardized Test Blocks per ASTM E384 See notes See notes 9 & 12
Indirect verification of Knoop Micro Indentation Hardness Testers:
HK Governed by the uncertainty of the standardized test block used to perform the indirect verification II & III ASTM E384
Standardized Test Blocks per ASTM E384 See notes 9 & 12
Measured Quantity & Range or Instrument Frequency CMC expressed as an Uncertainty(±) Type Remarks
Frequency 10 MHz 1 part in 10-10 II For the calibration of the normalized frequency offset averaged over 24 hours of stable frequency sources and measuring devices using a frequency standard and GPS system
0.01 Hz to 2 MHz 2.5 ppm + 5 µHz Generate using a multifunction calibrator. On-site calibration available
Voltage, DC
1 mV to 22 V 0.041 % to 3.7 ppm II Generate using a multifunction calibrator. For the calibration of voltage measuring devices. On-site calibration available.
22 V to 1100 V 3.7 ppm to 6.9 ppm
0 V to 100 mV 5.5 ppm + 0.3 µV Measure. For the calibration of dc voltage generating devices. On-site calibration available.
100 mV to 1 V 4.5 ppm + 0.3 µV
1V to 10 V 4.5 ppm + 0.5 µV
10 V to 100 V 6.5 ppm + 30 µV
100 V to 1000 V 18 ppm + 100 µV
1 kV to 100 kV 0.1 % to 0.5 % Measure. For the calibration of dc voltage generating devices. On-site calibration available.
Voltage, AC
220 µV to 1100 V 10 Hz to 1 MHz 49 ppm to 8 % II Generate. For the calibration of AC current measuring devices. See Annex A for detailed capabilities
1 mV to 1000 V 1 Hz to 2 MHz 142 ppm to 1.5 % Measure. For the calibration of voltage sources using a digital multiumeter. On-site calibration available.
1 kV to 60 kV 60 Hz 0.1 % to 0.5 % Measure:For the calibration of ac voltage generating devices.
Current, DC
10 µA to 2.2 A 0.064 % to 38 ppm II Generate. For the calibration of dc current measuring devices. On-site calibration available.
100 µA to 11 A 0.05 % + 500 µA
11 A to 20 A 0.1 % + 750 µA
100 nA to 1.0 A 430 ppm to 28 ppm Measure. For the calibration of dc current generating devices. On-site calibration available.
10 A to 100 A 100 ppm Measure using dc shunts and 8.5 digit DMM.
Current, AC
29 µA to 2.2 A 10 Hz to 10 kHz 7 % to 136 ppm II Generate. For the calibration of sinewave current measurement devices. See Annex B for details. On-site calibration available.
3 A to 20 A 45 Hz to 5 kHz 0.08 % to 3 %
1 µA to 1.0 A 10 Hz to 100 kHz 0.05 % to 1 % Measure. For the calibration of sinewave current generating devices. On-site calibration available
Resistance
1 mΩ to 100 MΩ 10 ppm to 100 ppm II Source: For the calibration of resistance measuring devices. On-site calibration available.
1 MΩ to 100 GΩ 100 ppm to 1000 ppm For the calibration of insulation resistance measurement instruments
1 mΩ to 1 GΩ 11 ppm to 0.6 % Measure. On-site calibration available
Oscilloscope
Amplitude DC
1.0 mV to 130 V (1 MΩ) 0.05 % of output + 40 µV II Source. For the calibration of oscilloscopes. On-site calibration available
1.0 mV to 6.6 V (50 Ω) 0.25 % of output + 40 µV
Square wave
1.0 mV to 130 V p-p (1 MΩ) 10 Hz to 10 kHz 0.25 % of output + 40 µV II Source. For the calibration of oscilloscopes. On-site calibration available
1.0 mV to 6.6 p-p V (50 Ω) 10 Hz to 10 kHz 0.25 % of output + 40 µV
Flatness. Leveled Sine Wave 5 mV to 5.5 V relative to 50 kHz 50 kHz to 100 MHz 1.5 % + 100 µV
100 MHz to 300 MHz 2 % + 100 µV
300 MHz to 600 MHz 4 % + 100 µV
600 MHz to 1.1 GHz 5 % + 100 µV
Time Marker 1 ns to 20 ms 50 ms to 5 s ( 25 + 1000T ) ppm (Note: T in seconds)
Rise Time 1 kHz to 2 MHz 300 ps
2 MHz to 10 MHz 350 ps
Input Resistance
40 Ω to 60 Ω 0.1 % II Source. For the calibration of oscilloscopes. On-site calibration available
500 KΩ to 1.5 MΩ 0.1 %
Input Capacitance 5 pF to 50 pF (1 MΩ) 5 % + 0.5 pF
Capacitance
0.19 nF to 1.1 nF 10 Hz to 10 kHz 0.5 % to 5.8 % II Source synthesized capacitance using a multiproduct calibrator. For the calibration of capacitance measuring devices. On-site calibration available.
1.1 nF to 3.3 nF 10 Hz to 3 kHz 0.8 % to 1.4 %
3.3 nF to 333 nF 10 Hz to 1 kHz 0.34 % to 0.55 %
0.33 µF to 1.1 µF 10 Hz to 600 Hz 0.35 % to 0.55 %
11µF to 33 µF 10 Hz to 300 Hz 0.34 % to 0.52 %
3.3 µF to 11 µF 10 Hz to 150 Hz 0.34 % to 0.55 %
11µF to 33 µF 10 Hz to 120 Hz 0.49 % to 0.67 %
33 µF to 110 µF 10 Hz to 80 Hz 0.54 % to 0.75 %
110 µF to 333 mF DC to 50 Hz 0.54 % to 0.72 %
0.33 mF to 1.1mF DC to 20 Hz 0.45 % to 0.75 %
11 mF to 33 mF DC to 6 Hz 0.54 % to 0.72 %
3.3 mF to 11 mF DC to 2 Hz 0.55 % to 0.75 %
11 mF to 33 mF DC to 0.6 Hz 0.84 % to 1.0 %
33 mF to 110 mF DC to 0.2 Hz 1.2 % to 1.4 %
Current clamp calibration
Effective DC current output
10 to 16.5 A Turns1 0.5 % + 20 mA II Source using a multifunction calibrator and a 50 turn coil. For the calibration of clamp meters.
16.5 to 150 A Turns 0.5 % + 140 mA
150 to 1025 A Turns 0.5 % + 500 mA
Effective AC current output
20 to 150 A Turns 65 to 440 Hz 0.8 % II Source using a multifunction calibrator and a 50 turn coil. For the calibration of clamp meters.
150 to 1000 A Turns 65 to 440 Hz 0.8 %
Electrical Calibration of Temperature Indicators and Simulators
Thermocouple simulation
-250 °C to 2316 °C 0.16 °C to 0.84 °C II Source for types B, E, J, K,, N, R, S and T thermocouples using multifunction calibrators. Suitable for the calibration of temperature indicators and process calibrators by electrical simulation of temperature. On-site calibration available.
RTD simulation
-200 °C to 630 °C 0.04 °C to 0.23 °C II Source for types B, E, J, K,, N, R, S and T thermocouples using multifunction calibrators. Suitable for the calibration of temperature indicators and process calibrators by electrical simulation of temperature. On-site calibration available.

Annex A

Uncertainty, ±{ ( % of reading) + residual }, of AC voltage measurement for the calibration of digital multimeters and voltage measuring devices
Voltage, AC Frequency
10 Hz to
20 Hz
20 Hz to
40 Hz
40 Hz to
20 kHz
20 kHz to
50 kHz
50 kHz to
100 kHz
100 kHz to
300 kHz
300 kHz to
500 kHz
500 kHz to
1 MHz
220 µV to 2.2 mV 0.0240 % +
4 µV
0.009 % +
4 µV
0.008 % +
4 µV
0.020 % +
5 µV
0.050 % +
5 µV
0.11 % +
10 µV
0.14 % +
20 µV
0.27 % +
20 µV
2.2 mV to 22 mV 0.024 % +
4 µV
0.009 % +
4 µV
0.008 % +
4 µV
0.020 % +
4 µV
0.05 % +
5 µV
0.11 % +
10 µV
0.14 % +
20 µV
0.27 % +
20 µV
22 mV to 220 mV 0.024 % +
12 µV
0.009 % +
7 µV
0.008 % +
7 µV
0.02 % +
7 µV
0.046 % +
17 µV
0.09 % +
20 µV
0.14 % +
25 µV
0.27 % +
45 µV
220 mV to 2.2 V 0.024 % +
40 µV
0.009 % +
15 µV
0.0045 % +
8 µV
0.0075 % +
10 µV
0.011 % +
30 µV
0.042 % +
80 µV
0.10 % +
200 µV
0.17 % +
300 µV
2.2 V to 22 V 0.024 % +
400 µV
0.009 % +
150 µV
0.0045 % +
50 µV
0.0075 % +
100 µV
0.010 % +
200 µV
0.0275 % +
600 µV
0.10 % +
2000 µV
0.15 % +
3200 µV
22 V to 220 V 0.024 % +
4 mV
0.009 % +
1.5 mV
0.0052 % +
0.6 mV
0.008 % +
1 mV
0.015 % +
2.5 mV
0.09 % +
16 mV
0.44 % +
40 mV
0.8 % +
80 mV
Voltage, AC Frequency
15 Hz to
50 Hz
50 Hz to
1 kHz
220 V to 1100 V 0.03 % + 16 mV 0.007 % + 3.5 mV

Annexe B

Best Uncertainty, ± {(% of measured AC current) + residual}, of AC current measurement for the calibration of current generating devices
Current, AC Frequency
10 Hz to
20 Hz
20 Hz to
40 Hz
40 Hz to
1 kHz
1 kHz to
5 kHz
5 kHz to
10 kHz
1 nA to 220 uA 0.025 % +
16 nA
0.016 % +
10 nA
0.012 % +
8 nA
0.028 % +
12 nA
1.1 % +
65 nA
220 uA to 2.2 mA 0.025 % +
40 nA
0.016 % +
35 nA
0.012 % +
35 nA
0.02 % +
110 nA
1.1 % +
650 nA
2.2 mA to 22 mA 0.025 % +
400 nA
0.016 % +
350 nA
0.012 % +
350 nA
0.02 % +
550 nA
1.1 % +
5000 nA
22 mA to 220 mA 0.025 +
4 µA
0.016 % +
3.5 µA
0.012 % +
2.5 µA
0.02 % +
3.5 µA
1.1 % +
10 µA
220 mA to 2.2 A N/A N/A 0.065 % +
35 µA
0.075 % +
80 µA
8.5 % +
160 µA

Notes

Note 1

Limited to calibrations performed by comparison with individual inch-sized steel gauge blocks covering the range from 0.05 inch through 20 inches (or mm equivalent) where the reference standards have been calibrated and traceable to the International System of Units (SI).

Return to table 1 note 1 referrer

Note 2

The CMC listed can be achieved only if the standards being calibrated are suitable for such a measurement. The uncertainty stated on a calibration report will reflect the uncertainty contribution of the standards that were calibrated.

Return to table 1 note 2 referrer

Note 3

This measured quantity is commonly known as parallelism of gauge blocks.

Return to table 1 note 3 referrer

Note 4

Limited to the measurement of optical flatness of gauge blocks and 4 inch diameter optical flats by the use of a reference optical flat and monochromatic light source.

Return to table 1 note 4 referrer

Note 5

Where applicable, CAL-MATRIX Metrology’s internally developed calibration procedures are based upon the following standards. Also, statements of compliance may be made against the following performance specifications (if not available, manufacturer’s or client’s specified tolerances are generally used):

Return to table 1 note 5 referrer

Note 5a

gauge block: GGG-G-15C, ASME B89.1.9

Return to table 1 note 5a referrer

Note 5b

ring gauge: ASME B89.1.6M

Return to table 1 note 5b referrer

Note 5c

plug gauge: ASME B89.1.5

Return to table 1 note 5c referrer

Note 5d

thread wire: ASME B89.1.17

Return to table 1 note 5d referrer

Note 5e

caliper: Federal Standard GGG-C-111

Return to table 1 note 5e referrer

Note 5f

dial indicator: ASME B89.1.10M

Return to table 1 note 5f referrer

Note 5g

micrometer and micrometer setting standard: Federal Specification GGG-C-105, ASME B89.1.13

Return to table 1 note 5g referrer

Note 5h

measuring rules: Federal Specification GGG-R-791H

Return to table 1 note 5h referrer

Note 5i

torque: Federal Specification GGG-W-686

Return to table 1 note 5i referrer

Note 5j

surface plate: Federal Specification GGG-P-463 (using a HP 5529A Laser Interferometer)

Return to table 1 note 5j referrer

Note 5k

threaded gauge: ANSI/ASME B1.2, ANSI/ASME B1.6

Return to table 1 note 5k referrer

Note 6

Laboratory primary gauge blocks are used as reference standards for plain ring and master cylindrical plug gauge measurement. The Type I uncertainties as listed are representative of laboratory “best practice” with the device under measurement being “in new” or “like new” condition. For plain ring measurement, single gauge blocks wrung with “end caps” are used as reference length standards; uncertainties are based on a one to one size relationship between the device under measurement and the gauge block reference standard.

Return to table 1 note 6 referrer

Note 7

In normal commercial gauging practice, the pitch diameter of a thread plug gauge is determined by measuring the diameter over thread wires inserted in the thread groove on opposite sides of the axis. The preferred term for this measurement is 'thread groove diameter'. Other names for this measurement are 'simple effective diameter' and 'simple pitch diameter'.

Return to table 1 note 7 referrer

Note 8

Calibration made using dead weight tester. For on-site calibrations, the local gravity is taken into consideration.

Return to table 1 note 8 referrer

Note 9

ASTM E10, E18 and E384 are published by the American Society for Testing and Materials

Return to table 1 note 9 referrer

Note 10

The Indirect Verification of Rockwell Hardness testers and Rockwell Superficial Hardness Testers is performed according to the requirements of ASTM E18-08a, section A1.4

Return to table 1 note 10 referrer

Note 11

The Indirect Verification of Brinell Hardness Testers is performed according to the requirements of ASTM E10-07a, section A1.4

Return to table 1 note 11 referrer

Note 12

The Indirect Verification of Knoop and Vickers Micro Hardness Testers is performed according to the requirements of ASTM E384-08a, section A1.4

Return to table 1 note 12 referrer

Supplementary Notes

  1. Calibration capabilities are traceable to the national measurement standards of Canada held or accepted by the National Research Council (NRC) or, with the agreement of NRC, to the national measurement standards of other countries and are thus traceable to the internationally accepted representation of the appropriate SI (Système International) unit.
  2. The laboratory's specific measurement capabilities are certified by the NRC's Calibration Laboratory Assessment Service (CLAS) and accredited by the Standards Council of Canada (SCC) in accordance with the following definitions:
    1. Type I: A capability of which the primary purpose is the calibration of measurement standards for other calibration laboratories. A laboratory with this type of capability has the appropriate reference standards, working standards, check standards, and calibration systems to be able to assess dynamically and to quantify its measurement uncertainty, and is able to monitor its measurement processes continually. The environmental conditions that affect the laboratory's measurements are closely monitored and controlled. A laboratory with this type of capability usually reports a measurement value accompanied by a comprehensive statement of uncertainty. A laboratory with this type of capability is often referred to as a standards or standards calibration laboratory.
    2. Type II: A capability of which the main purpose is the calibration and adjustment of test, measurement and diagnostic equipment for use in product testing, manufacturing, servicing, etc. A laboratory with this type of capability has the appropriate working standards and calibration systems to be able to calibrate to a manufacturer's specification and tolerance or calibrate to a written standard, using appropriate test uncertainty ratios (TUR). A laboratory with this type of capability usually reports a measurement value and indicates if the test equipment complies with a specification, tolerance or a written standard. It will, usually, base its capabilities on the specifications and tolerances of the working standards being used. It also has, normally, the means to check its working standards between calibrations and has available the appropriate environment(s). A laboratory with this type of capability is often referred to as a test equipment calibration laboratory.
    3. Type III: A calibration capability, within a laboratory, mobile or fixed, with the appropriate reference or working standards, of which the main purpose is to provide a reference. A laboratory with this type of capability usually has minimal means to monitor its calibration system. It relies mainly on the values assigned by higher echelon laboratories to its standards and uses these values with few other considerations to assign values or verify the compliance of equipment being calibrated to their specifications and tolerances or to written standards. This could be an on-site service subject to a wide range of environmental factors.
  3. The CMC of the laboratory includes the uncertainty associated with the calibration of the laboratory's reference or transfer standard by NRC, or by a laboratory acceptable to CLAS, uncertainties caused by the transportation of the calibrated reference standard from NRC (or other laboratories) to the laboratory, uncertainties of the calibration process in the laboratory, and uncertainties due to the behaviour of the most ideal available standard or measurement device for a specific measurement technology. These uncertainties include components which could have been evaluated by statistical methods on a series of repeated measurements and which can be characterised by experimental standard deviations. The other components, which can also be characterized by standard deviations, are evaluated from assumed probability distributions based on experience or other information. These have been combined to form an expanded uncertainty U = kuc with U determined from a combined standard uncertainty uc and a coverage factor k = 2. Since it can be assumed that the probability distribution characterised by the reported result and uc is approximately normal, the value of a calibrated device can be asserted to lie in the interval represented by the expanded uncertainty U with a level of confidence of approximately 95 percent. The uncertainties quoted do not include the possible effects on the calibrated device because of transportation, long term stability or intended use.
  4. The uncertainty of a specific calibration by the laboratory can be greater than the CMC because it will include uncertainties due to the actual condition and behaviour of the customer's device during its calibration.
  5. CLAS certification and SCC accreditation is the formal recognition of specific calibration capabilities. Neither the NRC nor SCC guarantee the accuracy of individual calibrations by the laboratory.
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