Eagle Electronics SeaChamp 2000 - Manual (Page 161)

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The Ticks menu (left) with Threshold menu (right).
Tick Marks setup gives you the option of modifying the gauges
minimum and maximum angles, values and ticks.
Minimum and Maximum Angles gives you control over the numerical
layout of the gauge. You can spread the numbers out around the gauge
or bunch them together in a smaller area.
Minimum and Maximum Values allows you to decide where the gauge's
numbers will begin and where they will top out. For example: you may
decide to start the gauge at 0, 5 or 10 and top it out at 85, 90 or 100.
Minimum or Maximum Tick controls how many tick marks will be
displayed on the gauge. If you set the minimum tick to 1 and the max
tick to 10, there will be 10 tick marks between 0 and 10, 10 and 20 and
so on. In the case of a speedometer, that's one tick for one mile per
hour. If you change the minimum tick to 2 and leave the maximum tick
at 10, you'll have one tick for every two miles per hour. That's five ticks
between 0 and 10, 10 and 20 and so on.
Thresholds setup can be used as a visual aid to mark portions of the
gauge. It is divided into Upper and Lower Thresholds, each containing
major (warning) and minor (caution) threshold settings. Two sets of
numbers must be entered for each threshold. Minor thresholds ranges
are colored yellow. Major threshold ranges are red.