225.6 Test Selection MethodThe Photometer 7500 Bluetooth offers two distinct methods ofselecting test parameters – Phot Number Entry Mode orHotkey Entry Mode.Phot Number Entry Mode is active by default. Switching toHotkey mode is carried out by enabling Hotkey Entry Mode inthe Test Selection Method menu.Select Hotkey Entry Mode and press OK. If ‘Hotkey EntryMode’ is enabled, the icon is displayed on the Info panel.Only one Test Selection Method is permitted at any time.Phot Number Entry ModeAll methods/calibrations (including User Defined Tests) areidentified by a unique three-digit ID Phot Number. Whenoperating in Phot Number Entry Mode, access the test ofchoice quickly by typing the three-digit number when in eitherthe Choose a Test screen or any result screen.For example, to access the Phot 002 Total Alkalinity testpress ‘002’, ‘02’ or just ‘2’ to load the method instantly.Hotkey Entry ModeThis option provides single button access to the ten mostfrequently used tests by assigning each to a unique positionon the numerical keypad.To assign a test to a specific Hotkey (0 – 9), firstly ensure that‘Hotkey Mode’ is enabled. This is shown by the indicatoron the Info Panel.