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UltraGauge
Blue
™
User Manual www.ultra-gauge.com
Horsepower 2
Gauge name
Range
Units
Abbreviation
Horsepower 2
0 to 9999.9
hp
Horsepower 2
kw
Horsepower 2 is derived based on the amount of energy being consumed by the engine and the
engine’s efficiency. By default the efficiency is assumed to be 24%. This means that only 24%
of the energy contained in the fuel actually produces power or torque output. 24% is an good
average for typical modern vehicles. This value can be adjusted if more specific information is
available via the menu system:
Note
. Horsepower 1 & 2 are provided as competing methods of determining the power output of
the engine. In general Engine Efficiency is likely to be more accurate. However, use which ever
provides the most reasonable results for your vehicle. Horsepower 2 is typically better for
modified engines. Fuel usage calibration improves the accuracy.
% Engine Load
Gauge name
Range
Units
Abbreviation
Calc/Engine Load
0 to 100
º
F
Load
º
C
Estimated percent of engine load. Where engine load is calculated as
% Load = (Current Air flow)
(Peak Air Flow)
Or
% Load = (Current Engine Torque)
(Peak Engine Torque)
The method used is vehicle dependent.
Distance Since
Trouble Codes
Cleared
Gauge name
Range
Units
Abbreviation
Distance since TC cleared
0 to 40,722
mi
TC Dist
0 to 65,535
km
Once trouble codes are cleared, this gauge measures the number of miles driven. The max value
is 40,722 miles. Once 40,722 miles is reached, the count will remain at 40,722 until trouble
codes are again cleared.
Throttle Position
Commanded
Gauge name
Range
Units
Abbreviation
Cmd Throttle Pos %
0 to 100
%
cThrottle
The percent throttle requested by the ECU. Used on electrically driven throttles.
When the driver presses the accelerator pedal, the ECU converts the output of the Pedal position
sensor to a corresponding throttle position commanded %. The electrical throttle position drive
then opens the throttle by the commanded %.
ECU Battery
Voltage
Gauge name
Range
Units
Abbreviation
Control Adapter Voltage
0 to 100
V
CM Volt
Voltage as measured at and by the Electronic Control Adapter. This is typically the same as
Battery voltage. See also UG Battery Voltage.
EGR Error
Gauge name
Range
Units
Abbreviation
EGR % Error
0 to 100
%
EGR Error
Exhaust Gas Recirculation (EGR) valve error is a percent of commanded EGR
EGR Error = EGR (actual) – EGR (commanded) X 100
EGR (commanded)
For example, if 20% EGR flow is commanded and 15% is actually delivered, then EGR Error is
(15-20)/20 x 100 = -25%
