NCSLI Recommended Intrinsic and Derived Standard Practice (RISP) Publications

RISP 1: Array Josephson Junction
Revision Year 2002

This document provides guidance on ensuring the definition and dissemination of the Volt using the Josephson Junction.  It provides definitions, guidance on equipment, software, training, traceability and quality assurance. Numerous references to applicable literature are provided as well.

RISP 3: Quantized Hall Resistance
Revision Year 1997
 
This document provides information on technical procedures to prospective and current users of the Quantized Hall Resistance (QHR) standard. The intended use of this document is to support dc resistance calibration activity with a level of technical detail appropriate for high-level commercial calibrations.

RISP 4: Deadweight Pressure Gauges
Revision Year 1998
 
This document addresses the need for a consolidated guide to practices in using Deadweight Pressure Gauges (DPGs). It provides information about the basic equipment function, application and common methods of operation so that the propagation of errors can be more widely understood. It also presents brief descriptions of the pertinent factors used to estimate the total uncertainty when using a DPG to perform a measurement (of either pressure or effective area) in accordance with the methods described in the scope of this document. This guide will be useful to calibration laboratory technicians, managers, engineers, scientists and anyone else interested in obtaining reliable estimates of the uncertainty in measurement results when using DPGs, or interpreting the estimates provided by others using the methods prescribed in this document.

RISP 5: Two-Pressure, Two Temperature Humidity Generator
Revision Year 2002
 
This document describes a family of humidity generators that are commonly referred to as two-pressure; two-temperature; or combined two-pressure, two-temperature systems. The humidity generators described are not limited to generation of relative humidity, but are capable of generating a variety of industry-acceptable humidity parameters, such as mixing ratio, dew point temperature, frost point temperature, vapor pressure, absolute humidity, and specific humidity.  Topics include the definitions of Humidity as well as the Equipment, Calculations, Uncertainty, Traceability, Quality control, Personnel, and Safety.  Numerous literature references are provided as well.

Catalog of Intrinsic and Derived Standards
Revision Year 1999
 
To track the status of intrinsic and derived standards, as developed by NCSLI or other international organizations, the Intrinsic and Derived Standards Committee developed this catalogue of intrinsic and derived standards and associated references covering all metrology areas.