ASME B89.1.14-2018 pdf free

ASME B89.1.14-2018 pdf free.Calipers.
Most calipers are equipped with the ability to adjust the zero point. For calipers with adjustable zero points, the metrological characteristics described in this Standard (see para. 5.10) apply when the outside measuring faces are properly brought into contact with each other for zero setting. For calipers without an adlustable zero, e.g., some vernier calipers, there may be a nonzero error when the outside measuring faces are brought together. This error shall be included in the evaluation of the metrological characteristics without correction.
5.4 Indication
The specified MPE values apply to any and all unique measurement indications made under reasonable use of the caliper. Averaging of several test values or other data treatment is not permitted when determining conformance to specifications.
5.5 Temperature
All specifications apply at a rated operating condition of 20°C (68°F) unless otherwise specified. The effective nominal coefficient of thermal expansion (CTE) of a caliper in the temperature range 10°C to 30°C shall be (11.5 ± 1.0) 106/°C. If not, then the effective nominal CTE with its uncertainty shall be supplied by the manufacturer.
Caliper specifications have a rated operating condition of 20°C (68°F); therefore, the test values observed in a verification test shall be corrected to 20°C (68°F) to obtain the error of indication that the caliper would have produced had the test been performed at 20°C (68°F). II temperature correction to 20°C (68°F) is not performed, this Standard allows the consequences to be included in the evaluation of the measurement uncertainty (see Nonmandatory Appendix C).
5.6 Measurement Uncertainty and Decision RuLes Unless otherwise stated, the default decision rule when determining the conformance of a caliper to specifications is simple 4:1 acceptance in accordance with ASME B89.7.3.1. The measurement uncertainty shall be evaluated In accordance with JCGM 100 (GUM) and ISO 14253- S. An example of determining conformance to specification is shown in Nonmandatory Appendix C, para. C-4.6.
5.7 TraceabiLity
All the length standards. e.g.. gage blocks, used in determining the conformance ofa caliper to specifications must have metrological traceability per ASME 1389.7.5.
5.8 Specifications
Table 5.8-1 lists default MPE values for calipers with a measuring range up to 1 000 mm (40 in.). The M PH values in Table 5.8-1 apply when no specifications are otherwise stated. The caliper manufacturer shall state the MPE values for larger calipers. The caliper manufacturer may also specify different MPE values than shown in this Standard. MPE values stated by the caliper manufacturer shall conform to the terms, definitions, and symbols in this Standard.
Table 5.8-1 includes specifications in both U.S. Customary and SI units. Due to the analog scale interval or digital resolution of a caliper, the conversion between units is not exact Test values and MPH values shall not be mathematically converted between units when determining conformance to a specification.
5.9 SpeciaLty Calipers
A large variety of specialty calipers are commercially available for measuring items such as tubing, threads, specialized measuring face configurations for use in restricted areas, large diameter measuring faces, spherical shaped measuring faces, and conical measuring faces that allow contact with surfaces that may not be flat or parallel. Specifications for specialty calipers shall be stated by the manufacturer and conform to the terms, definitions, and symbols employed in this Standard and ISO 13385-1.ASME B89.1.14 pdf download.