Optics and optical instruments. Test lenses for calibration of focimeters - Test lenses for focimeters used for measuring contact lenses Ingestion-build-180956 motor-driven vertical spindle centrifugal coolant

motor-driven vertical spindle centrifugal coolant pumps of the immersed (stem or flange mounted) and side mounted types having capacities of 15 litres/min to 200 litres/min

BS EN 62784 recognizes the internationally accepted level of protection against hazards such as electrical

IEC 60901

unacceptable reductions in flow rate

the testing procedures in order to confirm that it satisfies the basic safety and technical interchangeability requirements

Optics and optical instruments. Test lenses for calibration of focimeters - Test lenses for focimeters used for measuring contact lenses Ingestion-build-180956 motor-driven vertical spindle centrifugal coolant1 Scope This part of ISO 9342 specifies requirements for test lenses for focimeters that are used to measure contact lenses. These test lenses are used to find the precise correction values that are needed to convert the power values measured to back vertex power values, as defined in Clause 3. This part of ISO 9342 applies to focimeters meeting the requirements of ISO 8598.