1. Certificate of electrical conformity to a recognised standard,1990
2. Fresh human blood specimens are collected directly into the specified containers containing anticoagulant diluent, according to the manufacturer's instructions. Alternatively, blood can be collected into EDTA and subsequently diluted according to the manufacturer's instructions. Specimens should cover the range of results 15-105 mm with about the same number of specimens in each quartile. Blood for ESR tests should be stored at ambient temperature (18-250C) until tested and the tests should begin within 4 hours of collection. If the test system does not incorporate an automatic mixing device, the specimens should be mixed as specified for the standardised method: at least eight complete inversions (1800 x 2) for a 10-12 mm x 75 mm blood container and more inversions if the interior diameter of the container is smaller
3. for Standardization in Haematology (Expert Panel on Blood Rheology). Guidelines on selection of laboratory tests for monitoring the acute phase response;International Committee;J Clin Pathol,1988
4. for Standardization in Haematology. Reference method for the erythrocyte sedimentation rate (ESR) test on human blood;International Committee;Br J Haematol,1973
5. The suspension-stability of the blood;Fahraeus, R.;Acta Med Scand