4 ST60 Depth Instrument Owner’s Handbook
Offsets
Depths are measured from the transducer to the sea bed. However, offsets to the
actual distances measured can be applied during calibration (see
Chapter 4,
Calibration
), so that the displayed depth reading represents either the depth
from the keel or the depth from the waterline (W/L).
To see the offsets applied on your vessel, press the offset key. If the instrument is
operating as a master, the display will show the size of the offset (either positive
or negative) and the appropriate legend:
• When the offset is a positive value, the legend W/L is displayed.
• When the offset is a negative value, the legend KEEL is displayed.
• When the offset is zero, the legend OFFSET is displayed. With zero offset
applied, the displayed depth reading is measured from the transducer.
1.3 Display settings
Illumination
When the instrument is first powered up, the display illumination is set to its
lowest (courtesy) level, to facilitate initial access to the keys. To adjust the level of
illumination:
1. Hold down the
depth key for approximately one second, to enter the illumi-
nation-adjust mode.
2. There are four preset illumination levels. Momentarily press the
depth key to
cycle through these levels until you reach the level you want.
3. Press any other key to leave the illumination-adjust mode.
Note:
The display will time out to normal operation 7 seconds after the last key press.
Contrast
To adjust the display contrast:
1. Enter the illumination-adjust mode as described above.
2. Hold down the
depth key for a further two seconds approximately, to enter
the contrast-adjust mode.
3. There are four preset contrast settings. Momentarily press the
depth key to
cycle through these settings until you achieve optimum display quality.
4. Press any other key to leave the contrast-adjust mode.
Note:
The display will time out to normal operation 7 seconds after the last key press.
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