Instruction Manual pH 5+, pH 6+, Ion 6+-3-2. GETTING STARTED2.1 Description of Keypad FunctionsThe pH 5+ and pH 6+ have four keys while the Ion 6+ meter has six keys on its splash-proof keypad. The common keys are ON/OFF, HOLD/ENTER, CAL and MODE. TheIon 6+ meter adds S and T keys.ON/OFF: Powers meter on and off. Meter starts up in the mode that you last switchedoff from.MODE/INC: Selects measurement mode for Ion, mV, pH and Temperature. Incrementbutton for mV calibration (pH 6+ only).CAL: Allows calibration for Ion, pH, mV or Temperature, or to abort calibration andreturn to measure without confirming a value.S (Ion 6+ only): Increment values during calibration mode.T (Ion 6+ only): Decrement values during calibration mode.HOLD: Freezes the measured reading for easy viewing.ENTER: Confirms calibration value.pH 5+ and pH 6+ Ion 6+