Cobalt_OM_preprint_shell.fm Page 1 Wednesday, March 1, 2006 5:39 AM
R30 Owner’s Manual
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21
O
PERATING
I
NFORMATION
COBALT INSTRUMENTATION
SYSTEM
Your Cobalt boat is equipped with instruments
manufactured by Medallion Instrumentation
Systems. Each instrument has been manufactured
in an ISO 9001-2000 registered facility, built to
stringent standards and has passed a
comprehensive quality control procedure prior to
shipment. Each instrument is backed by a limited
lifetime warranty.
The Cobalt Instrument System:
Each gauge
system consists of a single Data Interface Gauge
(DIG) and several auxiliary gauges. The Data
Interface Gauge collects information from the CAN
bus and analog inputs and drives the auxiliary
gauges via a low-speed data bus. The auxiliary
gauges receive power from the Data Interface
Gauge. The backlight of all the gauges is powered
on a connector terminal, not associated with any
data bus.
For twin-engine applications, data for both engines
is on the CAN (P) bus attached to the Starboard
Master DIG to enable this system. The Master
(Starboard) and the Port DIGs are unique, distinct
gauges and are defined by the software
programmed into each gauge.
Tachometers:
Most tachometers have a tolerance
of 2% of full scale (120 RPM on a 6000 RPM tach).
In a twin-engine application, this could be a 240
RPM difference between each tach reading when
the engines are in sync. The tachometers will read
zero when the key is turned on, without the engine
running. The tach may display a reading when the
key is turned off.
Trim Gauges:
Trim gauges are calibrated to be the
most accurate and useful in the engine down or
“trim” range. The gauge may not read full “up” in
some cases. This is not unusual, nor does it
indicate a problem with either the trim sender or the
gauge.
Fuel Gauges:
Fuel gauges may “bounce” from fuel
sloshing in the tank. This does not necessarily
indicate a problem with the gauge or sender.
Instrument Fogging:
The instruments are
designed to be “fog resistant.” There are small
vents in their cases to allow trapped moisture to
escape. Occasionally moist air may be drawn into
the vents when the air inside the gauge cools down,
after the instrument is turned off. The morning sun
can draw this moisture up against the lens, causing
fogging. Turning on the instrument with the
instrument light “ON” will speed up moisture
removal. Your Cobalt instruments are built to
withstand the harsh marine environment, and
fogging will not harm them.
Radio Transmissions:
Some interference (erratic
operation) may be noticed on tachometers or
synchronizers during radio transmissions. This will
not damage the instrument or affect its accuracy.