Using the Tru Boost
The Tru Boost has 3 running modes. In all modes, for manifold pressures less
than 0 psig, the sweeping LED’s remain off, the gauge displays pressure in units of
in-hg, and the displayed values are negative. In mode A, the gauge will output the duty
cycle selected for boost setting A. The gauge will output the duty cycle selected for
boost setting B when in mode B. In the “OFF” mode, the solenoid output is turned off.
Press and hold the left button for 2 seconds to change run modes. The order of run
modes is shown in the menu tree below. The gauge also remembers the peak boost
level achieved. Press and hold the right button for 2 seconds to display the peak boost.
Press and hold the right button for 4 seconds to clear the peak boost value.
Scramble Boost
Scramble boost is a feature that allows the driver to momentarily change the duty
cycle output of the Tru Boost. The output duty cycle for scramble boost is set in the
scramble boost (SCb) option. The scramble boost duration is set by the scramble boost
time (SCr) option. Scramble boost is activated by grounding the orange scramble boost
input wire.
Alarm
All 24 LED lights will flash yellow if manifold pressure exceeds the alarm level for
more than 1 second. The low side driver output will also switch to ground. The LED
lights will continue to flash and the output will stay grounded until either button is
pushed or the gauge is turned off.
Over-Boost
The boost solenoid will shut off and all 24 LED lights will flash red if manifold
pressure exceeds the alarm value by 10% for more than 1 second or if manifold
pressure exceeds the alarm level by 20% for more than 200 milliseconds. The solenoid
will remain off and the LED lights will continue to flash until either button is pushed or
the gauge is turned off.
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Summary of Contents for 30-4350
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