BS ISO 18522:2016 pdf download

BS ISO 18522:2016 pdf download.Paper and board — Automated off-line testing of physical properties for CD (cross direction) profiles
1 Scope
This document specifies the procedures for determining the cross direction profiles of physical properties of paper and board using automated off-line testers. Where available for a given measurement, the relevant International Standard is referred to. It is applicable to most kinds of paper and board, but is not relevant for tissue and corrugated board. In this document, it is left to the paper and board producer and the customer to agree upon which properties are relevant. The results are reported as mean values or as profiles across the machine. Some properties are reported in index form. The result obtained using the relevant ISO standard based on stand-alone equipment is used in case of challenge or dispute, if not otherwise agreed. NOTE 1 The results obtained using specimens conditioned according to ISO 187 and stand-alone test instruments will, for some paper properties, differ from those obtained with unconditioned specimens and automated off-line testers. An investigation was made to only a limited extent, where the automated off-line testing was compared to stand-alone instruments, including the impact of conditioning. A summary of this investigation is reported in Annex B. NOTE 2 It is also possible to evaluate properties in the machine direction (MD), but this is usually only used for trouble-shooting.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 186:2002, Paper and board — Sampling to determine average quality
ISO 187, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples
ISO 534, Paper and board — Determination of thickness, density and specific volume
ISO 536, Paper and board — Determination of grammage
ISO 1924-2, Paper and board — Determination of tensile properties — Part 2: Constant rate of elongation method (20 mm/min)
ISO 1924-3, Paper and board — Determination of tensile properties — Part 3: Constant rate of elongation method (100 mm/min)
ISO 1974, Paper — Determination of tearing resistance — Elmendorf method
ISO 2469:2014, Paper, board and pulps — Measurement of diffuse radiance factor (diffuse reflectance factor)
ISO 2470-1, Paper, board and pulps — Measurement of diffuse blue reflectance factor — Part 1: Indoor daylight conditions (ISO brightness)
ISO 2470-2, Paper, board and pulps — Measurement of diffuse blue reflectance factor — Part 2: Outdoor daylight conditions (D65 brightness)
5.2 Automated off-line testers
There are a number of automated off-line testers on the market for which testing in many cases is based on existing International Standards. They are typically composed of an unwinder followed by several units placed sequentially, with the destructive test measuring heads located at the end of the line. Some test lines are equipped with a moisture content module providing the possibility of correcting the values if needed. Some of the test methods are not the same as those in the equivalent reference standards for stand- alone instruments. In these cases, correction factors and correction procedures can be a way to get results that correlate with those obtained using the reference standards. The equipment shall be calibrated in accordance with the instructions in the relevant International Standards. Where this is not possible, for example, in the case of non-standard testers or alternative methods, advice may be provided on calibration by the manufacturer or any suitable party, allowing due regard to the measurement capability of the tester.