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1.9 Dimmer (option)
The optional dimmer, which is designed to comply with the Japan Industrial Standards (JIS
F8852), is used for externally controlling the illumination of the display of the digital/analog
displays. When a dimmer is supplied locally, refer to the interconnection diagram at the back of
this manual for the values of the resistors since they are different depending on the display
(digital or analog) and power supply (115 V or 230 VAC).
To use this equipment for display unit/digital indicator/distance indicator, set the dimmer setting
on the unit menu. For detail, see “3.2 Setting of Unit Menu.
1.10 Range Switch Box, Analog Display Unit (option)
The range switch box selects the range to display on the analog display unit (option), and the
range scales are –2 to +6 knots and –10 to +30 knots.
These units are available in both bulkhead and flush mount versions. See the optional
equipment list at the beginning of this manual and the outline drawing at the back of this
manual.
When selecting a mounting location for these units keep the following in mind.
• The temperature and humidity of the mounting location should be moderate and stable.
• The mounting location should be well ventilated.
• Mount the unit where shock and vibration are minimal.
• Keep the analog display unit away from strong magnetic field-generating equipment such as
transformer and power generator.
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