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...Tn portable turbidity meter instruction manual apera instruments llc www aperainst com table of contents overview technical specifications parameters others instrument description and accessories display keypad battery installation calibration frequency procedure standards notes measurement sample vial handling preparation for single continuous warranty thank you selecting our this is an outstanding combination the most advanced electronic technology software design cost effective operates on nephelometric principle designed to meet criteria specified in iso din allows measure aqueous both laboratory field with built microprocessor chips elegant easy use has following remarkable characteristics smart functions such as automatic operating instructions power off low voltage etc large tft color screen blue background measuring mode green text graphics operational directive digital processing accuracy greatly improved structure meets requirements ip level protection suitable site contained...