Testing For a Gas Leak1. Turn instrument ON and allow it to warm up (approximately 60 seconds).2. The instrument is ready to check for gas leaks after the audible alarm begins tobeep. Note that the instrument starts in its high-sensitivity mode.3. Check for the presence of gas by positioning the tip of the flexible probe near thearea to be tested.4. An increase in the relative concentration of gas is indicated by the visual alarm’sLED blinking faster and the audible alarm’s beep rate increasing.5. Once the presence of the gas has been confirmed, the instrument’s sensitivitycan be lowered by double pressing the ON/OFF button (a decreasing frequencytone should be heard), allowing the location of the leak to be easily pinpointed.Replacement PartsReplacement parts can be obtained by contacting one of Bacharach’s Sales/ServiceCenters listed on the back cover of this manual.Item Part No.Sensor . . . . . . . . 19-0575Sensor Cover . . 19-0576Battery Door . . . 19-0577Replacing the SensorReplace the sensor if a sensor error occurs(Visual Alarm LED flashing green and red),or when the instrument can no longer detecta known source of combustible gas.1. Turn instrument OFF.2. Pull off sensor cover.3. Pull out old sensor and discard.4. Plug in new sensor, being sure to aligntab on sensor with notch in sensorsocket.5. Install sensor cover.Align tab on sensorwith notch in socketCombustibles SensorSensor Cover