This document specifies the method for in situ calibration of liquid flow metering installations using the radioactive tracer transit time method. The method specified is an application of the flow measurement method described in ISO 2975/Vll for the calibration of permanent flow meter installations.
A method of linear calibration of axial load fatigue testing machines is proposed. It is built on the understanding obtained from a vibration analysis of the force transfer function from the load cell of the machine to a fabricated calibration bar. The results have been successfully verified on a commercial testing machine installed at SP in Borås.
More than 8 years of research in calibration of atomic force microscopes (AFM) has been condensed in to two procedures for calibration of metrology grade AFM instruments. The greatest success of the project is that DFM in September 2002 has - as one of the first laboratories in the world - successfully passed a technical assessment for using one of these procedures for accredited (i.e. traceable) AFM measurements.
The combined expanded uncertainty for calibrations according to NT FIRE 050 performed in the furnace at SP is calculated and presented. The result is presented in tables so that the parameters that contributes most to combined uncertainty is easily recognized.
This NORDTEST method describes procedures for calibration of voltmeters and ammeters which are to be used for measurements of voltage and current during direct current are welding. It also describes test procedures to verify the fitness of an instrument for measurements during direct current arc welding.
The method can be used for calibration of measuring psychrometers against a work standard or a work standard against a reference standard. If no work standard is used, the measuring psychrometers are all calibrated against a reference standard.
The scope of this NORDTEST method is to calibrate electrical instruments for the measurement of relative air humidity. The test method is only for measuring equipment which gives off or takes up humidity to a limited extent.
Nordtest is a trademark of Nordic cooperation in conformity assessment. The emphasis of Nordtest is to develop, promote and innovate Nordic test methods and pre-normative activity. Nordtest endeavours to remove technical barriers to trade and promotes the concept: “Approved once, accepted everywhere”.