73. User InterfaceThe QRAE 3’s user interface consists of the display, LEDs, an alarm buzzer, and two keys.3.1. Display OverviewThe LCD display provides visual feedback that includes the sensor types, readings, batterycondition, and other functions.3.1.1. Status Indicator IconsAlong the top of most screens are status indicators that tell you whether a function is operatingand/or its strength or level.Icon FunctionWireless status: the radio is on (replaced by “R” when Roaming is on)Wireless status: the radio is off (replaced by “R” when Roaming is on)R Roaming status: “R” blinks when trying to find a network (replaced by antennawhen Roaming is off)R Roaming status: “R” solid when network communication established (replaced byantenna when Roaming is off)The instrument is not equipped with a radio (no icon)Wireless strength (0 to 5 bars)1 bar = Network joined, signal very low RSSI (less than 20%)2 bars = Network joined, signal low RSSI (21% to 40%)3 bars = Network joined, signal medium RSSI (41% to 60%)4 bars = Network joined, signal good RSSI (61% to 80%)5 bars = Network joined, signal very good RSSI (81% to 100%)Pump status (only on pump-equipped models)Datalogging status (shown when datalogging is on, blank when off)Battery status (three segments show battery charge level)Man Down alarm enabledUnit of measureReading valueSensor typeSoft keys (functionschange by activity)Pump, Datalog, and BatteryStatus indicatorsWireless radio statusand signal strengthMan Down alarm onCalibration and bump testup to date