Assessments - 2, GPA: 4.5
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Facilidade de uso
Position "ML 3" affords the highest degree of noise rejection. The status of the noise limiter, (OFF) N1, N2, N3 or no display, is indicated on the echo sounder picture. Note: If the noise limiter is left in N3 when no interference exists, weak echoes may be missed or eliminated. SHIFT MODE SHIFT * MANUAL AUTO The basic range window can be shifted manually by the front panel SHIFT [+] and [-] keys. This menu allows selection of automatic bottom tracking feature at the "AUTO" position. Automatic Bottom Tracking The automatic bottom tracking function shifts the basic range window up and down automatically to track the seabed on the lower half of the screen. The basic range windows jumps up when the seabed trace rises up over the center of the normal picture, and jumps down when it disappears from the lowest limit of the picture. The step of jumping is 1/4 of the basic range in use. Note: 1. The indication "AUTO" appears at the top of the ES picture. 2. When the seabed return becomes weak, the AUTO function is disabled and the basic range scale keeps on shifting to search for seabed echoes. To continue the AUTO mode, increase the GAIN for stable reception of the seabed. 3. The manual shifting is disabled during the automatic bottom tracking. 15 THRESHOLD (SIGNAL LEVEL) SIG LEVEL * SL OFF SL 1 SL 2 SL 3 The threshold (signal level) sub menu is used for eliminating low intensity echoes in three steps of SL1, SL2 and SL3 over the entire screen. SL1 for blue, SL2 for light green and SL3 for green color echoes. COLOR SELECTION FOR DAY AND NIGHTTIME OPERATION * NIGHT DAY This color sounder paints targets in 7 or 5 colors in accordance with the echo strength. Select either NIGHT (7-color presentation, background in LIGHT BLUE) or DAY (5-color presentation, background in DEEP BLUE) position to meet your operating envi ronment. DATA DISPLAY OFF * ON This sub menu allows switching the data display of water temperature, ship’s speed and ship's position on and off. This function is disabled on the NAV display which shows all navigation data. E5-LB «-3 -I4-. ■ 0 M£N_IA E5-LB SCALE DISPLAY aw» OFF * ON This sub menu switches the display of the depth scale on and off. 16 BOTTOM ALARM AND FISH ALARM ON/OFF B/F ALARM * OFF BA FA ALARM ZONE ALM ZONE 1/3 1/2 * 1 2 3 WATER TEMPERATURE TEMP ALM * OFF ? UP I DOWN This unit can generate a fish alarm or bottom alarm, as well as a temperature alarm. This menu allows selection among OFF, BA for bottom alarm and FA for fish alarm. This sub menu is used to set the alarm zone range. The alarm zone range is a function of the alarm zone setting and unit value of the range in use. For example, if the alarm zone setting is 2 and the unit value of the range in use is 5m (see the table below), the alarm zone range would be 10m (5m x 2 = 10m), which can be moved anywhere within the range in use. Unit Value of Alarm Zone ange Meters Feet Fathoms P/B 1 1 3.75 0.5 0.5 2 2 5 1 1 3 5 20 2 2 4 10 20 5 5 5 20 50 10 10 6 25 100 20 25 7 50 125 20 25 8 50 200 25 50 ALARM The water temperature alarm can be activated by the TEMP ALM menu and its alarm zone set by the TEMP LIM. UP and DOWN positions set the alarm to be activated for water temperature higher and lower than the value set by the TEMP LIM menu respectively. The TEMP LIM range as indicated on the top line of the TEMP LIM sub menu and the current setting below it. Setting can be changed with the arrow keys. WATER TEMPERATURE CALIBRATION SHIP1 TEMP ADJ -S : +5 * +0.0°C The TEMP ADJ menu allows calibration of water temperature indication between + or - 5°C (or 10°F). This deviation is caused by the characteristics and mounting state of an optional water temperature sensor. Press the [a] and [▼] keys to change the value. S SPEED CALIBRATION SPEED ADJ -10 : +10 * +0% The SPEED ADJ menu allows calibration of ship's speed indication between -10 and +10%. This deviation is caused by the characteristics and mounting state of an optional ship's speed sensor. Press the [aj and [▼] keys to change the value. 18 INTERPRETING THE DISPLAY Using some typical examples, this section describes how to interpret the echogram. Fish school Fish schools COLOR BAR The color bar shows the relation between the echo intensity and the echo color on the screen. The top color (reddish brown) is used for the strongest echo and the lower colors for the weaker echoes. It can be used as a reference to estimate fish school density, fish species and hardness of seabed. The number of colors can be changed from 8 to 6 with the MENU screen. See page 16. t Gieen * I > < I iJ .* I if ZERO LINE The zero line represents the transducer's position, and moves off the screen when a phased range is used. Phased 19 SEABED Seabed echoes are normally strong and displayed in reddish brown or red, but colors and width will vary with bottom material, water depth, frequency, pulselength, and sensitivity. BOTTOM PR...