Lowrance HDS-7 Gen3 Installation Manual US - Page 38

Water speed averaging (sonar transducer) Averages water speed by measuring your speed at a selected interval of time. Water speed intervals range from one to thirty seconds, e.g. if you select five seconds, your displayed water speed will be based on averaging over 5 seconds of sampling. Calibration range: 1-30 seconds. Default is 1 second. Water temperature calibration (sonar transducer) Temperature calibration is used to adjust the water temperature value from the sonar transducer to match the data from another temperature sensor. It may be required to correct for localized influences to the measured temperature. Calibration range: -9.9° - +9.9°. Default is 0°.  Note: Water temperature calibration only appears if the transducer is temperature capable. Check transducer type selection if this option should be available. Transducer type Transducer type is used for selecting the transducer model connected to the sonar module. The transducer selected will determine what frequencies the user can select during sonar operation. In some transducers with built-in temperature sensors, the temperature reading may be inaccurate or not available at all if the wrong transducer is selected. Transducer temperature sensors are one of two impedances - 5k or 10k. Where both options are given for the same model transducer, refer to paperwork supplied with transducer to determine impedence. StructureScan and SpotlightScan These features are both enabled automically when a transducer is plugged in before the unit has been powered on. The SpotlightScan transducer has a 83/200 kHz element incorporated, which requires connection to the 'Sonar' port. This transducer has XID (transducer ID), so manual selection of the transducer is not required. 36 | Software setup | HDS Gen3 Installation Manual