Specifications

Page 8
Tachometer / Fuel Monitor
The Serial Bus Tachometer / Fuel Monitor
instrument provides both the functions of a
tachometer and a fuel - engine monitoring
system. The analog tachometer is a stepper
motor instrument which looks like a
standard analog device but which is
actually a digital instrument. On small
pointer movements you may occasionally
see the pointer moving in the one third
degree “steps” that represent the accuracy
of the instrument.
The tachometer LCD screen displays
several functions. The displayed data
includes “engine hours”, “time remaining”,
“engine temperature”, “oil pressure”, “system
voltage”, and engine alarm conditions.
Pressing the “mode M” button will select
the various functions as shown in
Figure 2.
In order to minimize “false” alarms, the
“low fuel” and “low voltage” alarms only
function when the engine is known to be
running based on the presence of
tachometer data.
Several alarm conditions may also be
displayed in the LCD display when
needed:
1 Low fuel
2 Low oil pressure
3 High engine temperature
4 Low voltage
5 Engine RPM reduction due to engine
controller command
6 RPM limit
7 Knock sensing system malfunction
8 Ignition system malfunction
9 Manifold pressure sensor (MAP)
malfunction
10 Manifold temperature sensor
malfunction
11 Throttle position sensor (TPS)
malfunction
12 Coolant sensor malfunction
Alarm messages will be displayed on the
tachometer LCD display. Messages 1-5 will
also include a flashing red light. All
messages will be displayed until either the
problem is corrected or the operator
manually cancels the warning message.
Canceling system alarms
To manually cancel system warning
messages, simultaneously press both the
“Up” and “Down” buttons on the
tachometer.
This will disable the warning message
temporarily. If the problem is not corrected
in 1 minute (5 minutes for low fuel), the
warning will be displayed again. The
operator can cancel as often as desired.
Engine Hourmeter
Displays the number of hours that the
engine has been operated. The display will
show “XXXX.XHr”.
M
Mode
Button
Down
Button
Up
Button