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Turbidity Meter with infra-red light source ( EN ISO 7027) Turbidity is measured according to EN ISO 7027 by nephelometric means ( 90° scattered light) . The infra-red light-source permits measurement of coloured and colour-free samples. The automatic measurement range detection facility ( Autorange) enables direct turbidity measurement from 0.01 to 1100 NTU with an accuracy of ± 2% up to 500 NTU and ± 3% thereafter. A large graphic display, a choice of several different languages and user-friendly operating instructions make the device extremely easy to use. Highlights Meets EN ISO 7027 Automatic overall range adjustment with Standard-Set T-Cal Auto-ranging High accuracy Laboratory and mobile use RS 232 interface Storage for up to 1000 data-sets Real-time clock Waterproof sample chamber and housing Technical data - Principle nephelometric ( 90° scattered light) - Light source IR-LED ( 860 nm) - Keypad conditional acid and solvent resistant; membrane switch keypad with audible feedback - Auto – Off automatic switch off approx. 20 minutes after last key press - Display Graphic-Display - Update Software update via Internet - Clock real time clock - Memory capacity 1000 data sets with date, time and registration number - Sample volume approx. 12 ml - Range 0.01 – 1100 NTU ( Auto range) - Resolution ( NTU) 0.01 from 0.01 - 9.99 0.1 NTU from 10.0 - 99.9 1 NTU from 100 - 1100 - Accuracy ( NTU) ± 2 % of reading or 0.01 ( 0 - 500) ± 5 % of reading ( 500 - 1100) - Ambient conditions temperature: 5-40° C at 30-90% relative humidity ( non condensing) - Interface RS232 for printer and PCconnection; 9-pin D-sub-mail connector; data format ASCII - Power supply 7 NiCd rechargeable batteries( Type AA/ Mignon with 1100mAh) ; wall plug mains adapter ( Input: 100-230V, 50-60Hz; Output: 15V; 530mA) and Lithium battery ( CR 2032, 3V) for data storage and real time clock. - Weight ( instrument) approx. 1000 g including batteries and power pack - Dimensions ( L x W x H) approx. 265 x 195 x 70 mm - Specification meets ISO 7027 - CE-Conformity