Standards Index

NIST GLP 1 (2019) Quality Assurance of Laboratory Measurement Results NIST Current NIST GLP 10 (2019) Purity of Water NIST Current NIST GLP 11 (2019) Painting Weights NIST Current NIST GLP 13 (2019) Drying "To Contain" Volume Standards NIST Current NIST GLP 14 (2019) Method Validation NIST Current NIST GLP 15 (2019) Procedure for Software QA NIST Current NIST GLP 3 (1986) Care of State Standards NIST Current NIST GLP 4 (2019) Periodic Recalibration of State Standards NIST Current NIST GLP 6 (1986) Prerequisites for Testing Measurement Standards and Equipments NIST Current NIST GLP 8 (1986) Sealing of Equipment NIST Current NIST GLP 9 (2019) Rounding Expanded Uncertainties and Calibration Values NIST Current NIST GMP 1 (2019) Reading Turning Points on an Equal Arm Balance NIST Current NIST GMP 10 (2019) Understanding Factors Affecting Weighing Operations NIST Current NIST GMP 11 (2019) Assignment and Adjustment of Calibration Intervals for Laboratory Standards NIST Current NIST GMP 12 (2019) Standard Operating Procedure Selections NIST Current NIST GMP 13 (2019) Ensuring Traceability NIST Current NIST GMP 2 (2014) Reading the Center of Graduations When Using a Microscope NIST Current NIST GMP 3 (2019) Method of Reading A Meniscus Using Water or Other Wetting Liquid NIST Current NIST GMP 4 (1986) Adjusting the Optical Scale on a Single Pan Mechanical Balance NIST Current NIST GMP 5 (1986) Weight Cleaning Procedures NIST Current NIST GMP 6 (2019) Cleaning Metal Volumetric Measures NIST Current NIST GMP 7 (2019) Cleaning Precision Glassware NIST Current NIST GMP 8 (2014) Recommended Form of Reporting Tape Calibrations NIST Current NIST GMP 9 (2014) Equations for Metallic Tapes NIST Current NIST Handbook 143:2019 State Weights and Measures Laboratories Program Handbook NIST Current NIST Handbook 44 (2025) Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices NIST Current NIST IR 6969:2019 Selected Laboratory and Measurement Practices and Procedures to Support Basic Mass Calibrations (SOP series) NIST Current NIST SOP 1 (2019) Preparation of Calibration Certificates NIST Current NIST SOP 10 (2014) Calibration of Rigid Rules NIST Current NIST SOP 11 (2014) Calibration of Metal Tapes, Bench Method NIST Current NIST SOP 12 (2014) Calibration of Steel Tapes, Tape-to-Tape Method NIST Current NIST SOP 13 (2006) Calibration of Volumetric Ware, Gravimetric Method NIST Current NIST SOP 14 (2019) Gravimetric Calibration of Volumetric Ware Using an Electronic Balance NIST Current NIST SOP 15 (2006) Calibration of Intermediate and Large Volume Standards Gravimetric Method Using an Equal-Arm Balance NIST Current NIST SOP 16 (2019) Calibration of Measuring Flasks, Volume Transfer Method NIST Current NIST SOP 17 (2019) Control Charts of Laboratory Owned Check Standards NIST Current NIST SOP 18 (2019) Calibration of Graduated Neck-Type Metal Volumetric Field Standards, Volumetric Transfer Method NIST Current NIST SOP 19 (2019) Calibration of Large Neck-Type Metal Provers, Volume Transfer Method NIST Current NIST SOP 2 (2019) Applying Air Buoyancy Corrections NIST Current NIST SOP 20 (2019) Standard Deviation and Range Charts NIST Current NIST SOP 21 (2019) Calibration of LPG Provers NIST Current NIST SOP 22 (2019) Calibration of Traffic Speed Guns and Tuning Forks NIST Current NIST SOP 23 (2014) Calibrations of PI Tapes Bench Method NIST Current NIST SOP 24 (2019) Calibration of Field Standard Stopwatches NIST Current NIST SOP 26 (2019) Gravimetric Calibration of Dynamic Volumetric Systems used as Standards NIST Current NIST SOP 27 (2019) Calibration of Railroad Test Cars (Mass) NIST Current NIST SOP 28 (2019) Using Advanced Weighing Designs NIST Current NIST SOP 29 (2019) Assignment of Uncertainty NIST Current NIST SOP 3 (1986) Weighing by Double Substitution Using an Equal-Arm Balance NIST Current NIST SOP 30 (2019) Process Measurement Assurance Program NIST Current NIST SOP 31 (2019) Scale Plate Calibration for Volumetric Field Standards NIST Current NIST SOP 33 (2019) Calibration of Weights Carts NIST Current NIST SOP 34 (2019) Selection and Use of Sensitivity Weights and Tare Weights in Weighing Procedures NIST Current NIST SOP 4 (2019) Weighing by Double Substitution NIST Current NIST SOP 49 (2019) Calibration of Environmental Monitoring Standards by Direct Comparison NIST Current NIST SOP 5 (2019) Using a 3-1 Weighing Design NIST Current NIST SOP 52 (2019) Verification and Adjustment of Digital Conductivity Meter and Measuring Water Conductivity NIST Current NIST SOP 6 (1986) Weighing By Transposition NIST Current NIST SOP 7 (2019) Weighing by Single Substitution Using a Single Pan Mechanical Balance, a Full Electronic Balance, or a Balance with Digital Indications and Built in Weights NIST Current NIST SOP 8 (2019) Medium Accuracy Calibrations of Mass Standards by Modified Substitution NIST Current NIST SOP 9 (2019) Control Charts for Calibration of Mass Standards NIST Current NIST SP 250 (1998) NIST Calibration Services Users Guide NIST Current NIST SP 250-1 (1987) Spectral Radiance Calibrations NIST Current NIST SP 250-10 (1987) Radioactivity Calibrations with the 4-pi Gamma Ionization Chamber NIST Current NIST SP 250-100 (2022) Magnetic Resonance Imaging Biomarker Calibration Service: NMR Measurement of Isotropic Water Diffusion Coefficient NIST Current NIST SP 250-101 (2024) Ultraviolet to Short-Wave Infrared Spectral Reflectance NIST Current NIST SP 250-1039r1 (2013) Liquid Flow Meter Calibrations with the 0.1 L/s and the 2.5 L/s Piston Provers NIST Current NIST SP 250-1046 (2009) Gas Flowmeter Calibrations With the 26 m3 PVTt Standard NIST Current NIST SP 250-11 (1988) Dosimetry for High Dose Applications NIST Current NIST SP 250-12 (1987) Neutron Personnel Dosimetry NIST Current NIST SP 250-13 (1988) Activation Foil Irradiation with Californium Fission Sources NIST Current NIST SP 250-14 (1988) Activation Foil Irradiation by Reactor Cavity Fission Sources NIST Current NIST SP 250-18 (1988) Neutron Source Strength Calibrations NIST Current NIST SP 250-19 (1988) Calibration of Gamma-Ray-Emitting Brachytherapy Sources NIST Current NIST SP 250-2 (1987) Far Ultraviolet Detector Standards NIST Current NIST SP 250-21 (1988) Calibration of Beta-Particle Radiation Instrumentation and Sources NIST Current NIST SP 250-22 (1987) Platinum Resistance Thermometer Calibrations NIST Current NIST SP 250-23 (1988) Liquid-in-Glass Thermometer Calibration Service NIST Current NIST SP 250-24 (1987) Standard Cell Calibrations NIST Current NIST SP 250-26 (1988) Phase Angle Calibration Services NIST Current NIST SP 250-27 (1989) AC-DC Difference Calibrations NIST Current NIST SP 250-28 (1988) Solid-State DC Voltage Standard Calibrations NIST Current NIST SP 250-29 (2004) Remote Frequency Calibrations: The NIST Frequency Measurement and Analysis Service NIST Current NIST SP 250-3 (1987) Radiometric Standards in the Vacuum Ultraviolet NIST Current NIST SP 250-31 (1989) Mass Calibrations NIST Current NIST SP 250-32 (1988) A Calibration Service for 30 MHz Attenuation and Phase Shift NIST Current NIST SP 250-33 (1988) A Calibration Service for Voltage Transformers and High-Voltage Capacitors NIST Current NIST SP 250-34 (1989) High Vacuum Standard and Its Use NIST Current NIST SP 250-35 (1989) The Calibration of Thermocouples and Thermocouple Materials NIST Current NIST SP 250-36 (1991) A Calibration Service for Current Transformers NIST Current NIST SP 250-38 (1992) NIST Leak Calibration Service NIST Current NIST SP 250-39 (2009) NIST Calibration Services for Pressure Using Piston Gauge Standards NIST Current NIST SP 250-4 (1987) Fricke Dosimetry in High-Energy Electron Beams NIST Current NIST SP 250-41 (2008) Spectroradiometric Detector Measurements: Ultraviolet, Visible, and Near-Infrared Detectors for Spectral Power NIST Current NIST SP 250-42 (1998) Spectroradiometric Detector Measurements: Part III — Infrared Detectors NIST Current NIST SP 250-43 (1998) Radiance Temperature Calibrations NIST Current NIST SP 250-44 (1998) Radiation Processing Dosimetry Calibration Services and Measurement Assurance Program NIST Current NIST SP 250-45 (1998) Radiation Processing Dosimetry Calibration Services: Manual of Calibration Procedures NIST Current NIST SP 250-46 (1998) NIST Multifunction Calibration System NIST Current NIST SP 250-47 (1998) NIST Calibration Service for Capacitance Standards at Low Frequencies NIST Current NIST SP 250-48 (1998) Spectral Reflectance NIST Current NIST SP 250-49 (1998) NIST Calibration Services for Gas Flow Meters: Piston Prover and Bell Prover Gas Flow Facilities NIST Current NIST SP 250-51 (1999) Calibration Service of Optoelectronic Frequency Response at 1319 nm NIST Current NIST SP 250-52 (2000) Error Analysis and Calibration Uncertainty of Capacitance Standards at NIST NIST Current NIST SP 250-53 (1999) Calibration Service for Spectral Responsivity of Laser and Optical-Fiber Power Meters NIST Current NIST SP 250-54 (2000) Optical Fiber Power Meter Calibrations at NIST NIST Current NIST SP 250-56 (2000) Optical Fiber Power Meter Nonlinearity Calibrations at NIST NIST Current NIST SP 250-57 (2000) Measurement Assurance Program for the Spectral Density of Relative Intensity Noise of Optical Fiber Sources Near 1550 nm NIST Current NIST SP 250-58 (2001) Calibration of X-Ray and Gamma-Ray Measuring Instruments NIST Current NIST SP 250-59 (2002) NIST Computer Time Services: Internet Time Service (ITS), Automated Computer Time Service (ACTS), and time.gov Web Sites NIST Current NIST SP 250-5a (2004) Alpha-Particle Calibrations NIST Current NIST SP 250-6 (1987) Regular Spectral Transmittance NIST Current NIST SP 250-60 (2003) Measurement Assurance Program for Wavelength Dependence of Polarization Dependent Loss of Fiberoptic Devices NIST Current NIST SP 250-61 (2004) Operation and Reference Manual for the NIST Automated AC-DC Calibration Systems and Software NIST Current NIST SP 250-62 (2003) High-Accuracy Laser Power and Energy Meter Calibration Service NIST Current NIST SP 250-63 (2004) Gas Flowmeter Calibrations with the 34 L and 677 L PVTt Standards NIST Current NIST SP 250-64 (2004) Calibration Service for Low-Level Pulsed-Laser Radiometers at 1.06 um NIST Current NIST SP 250-65 (2004) Heat-Flux Sensor Calibration NIST Current NIST SP 250-67 (2005) NIST Time and Frequency Radio Stations: WWV, WWVH, and WWVB NIST Current NIST SP 250-69 (2011) Regular Spectral Transmittance NIST Current NIST SP 250-70 (2006) Specular Gloss NIST Current NIST SP 250-71 (2008) 0:45 Surface Color NIST Current NIST SP 250-72 (2006) NIST Calibration Services for Liquid Volume NIST Current NIST SP 250-73 (2006) NIST Calibration Services for Water Flowmeters: Water Flow Calibration Facility NIST Current NIST SP 250-74 (2006) Absorbed Dose to Water Calibration of Ionization Chambers in a Co-60 Gamma-Ray Beam NIST Current NIST SP 250-75 (2007) cw Laser Power and Energy Calibrations at NIST NIST Current NIST SP 250-76 (2007) Three-Terminal Precision Standard Capacitor Calibrations at NIST NIST Current NIST SP 250-77 (2008) High Power Laser Calibrations at NIST NIST Current NIST SP 250-78r1 (2018) NIST Calibration Services for Hydrometers NIST Current NIST SP 250-79 (2007) Airspeed Calibration Service NIST Current NIST SP 250-80 (2009) Gas Flowmeter Calibrations with the Working Gas Flow Standard NIST Current NIST SP 250-81 (2008) Standard Platinum Resistance Thermometer Calibrations from the Ar TP to the Ag FP NIST Current NIST SP 250-83r1 (2021) Calibration of Hygrometers with the Hybrid Humidity Generator NIST Current NIST SP 250-87 (2010) Calibration Service for Instruments That Measure Laser Beam Diameter NIST Current NIST SP 250-89 (2011) Spectral Irradiance Calibrations NIST Current NIST SP 250-9 (1987) Calibration of Beta-Particle-Emitting Ophthalmic Applicators NIST Current NIST SP 250-90 (2012) Calibration Uncertainty for the NIST PM/AM Noise Standards NIST Current NIST SP 250-91 (2015) Calibration of Cryogenic Resistance Thermometers between 0.65 K and 165 K on the ITS-90 NIST Current NIST SP 250-93 (2015) NIST Calibration Services for Spinning Rotor Gauge Calibrations NIST Current NIST SP 250-94 (2015) Infrared Optical Properties of Materials NIST Current NIST SP 250-95 (2018) NIST Measurement Services: Photometric Calibrations NIST Current NIST SP 250-96 (2017) Dimensional Measurement of Nanostructures with Scanning Electron Microscopy NIST Current NIST SP 250-97 (2018) Magnetic Resonance Imaging Biomarker Calibration Service: Proton Spin Relaxation Times NIST Current NIST SP 250-98 (2021) Liquid Flow Meter Calibrations with the 15 kg/s Water Flow Standard NIST Current NIST SP 250-99 (2022) Diffuse Visual Transmission Density NIST Current NIST SP 330:2019 The International System of Units (SI) NIST Current NIST SP 811:2008 Guide for the Use of the International System of Units (SI) NIST Current NIST TN 1297 (1994) Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results NIST Current