UltraRAE 3000 User’s Guide27 MaintenanceThe major maintenance items of the instrument are:• Battery pack• Sensor module• PID lamp• Sampling pump• Inlet connectors and filtersIn addition, you can test the humidity sensor (this should be doneannually, in order to ensure the most accurate operation).Note: Maintenance should be performed by qualified personnelonly.NOTE: The printed circuit board of the instrument is connectedto the battery pack even if the power is turned off. Therefore, it isvery important to disconnect the battery pack before servicing orreplacing any components inside the instrument. Severe damageto the printed circuit board or battery may occur if the batterypack is not disconnected before servicing the unit.27.1 Battery Charging & ReplacementWhen the display shows a flashing empty battery icon, the batteryrequires recharging. It is recommended to recharge the instrumentupon returning from fieldwork. A fully charged battery runs ainstrument for 16 hours continuously. The charging time is less than 8hours for a fully discharged battery. The battery may be replaced inthe field (in areas known to be non-hazardous), if required.WARNING!To reduce the risk of ignition of hazardous atmospheres, rechargebattery only in area known to be non-hazardous. Remove andreplace battery only in areas known to be non-hazardous.104
