The compact ZAVT-1 module adds fail-safe operation to Zeitronix
Zt-2 Wideband Systems. The ZAVT-1 contains a
loud 95 dB rated buzzer and bright red LED for notifying the driver of a
problem. Fail-safe operation is achieved using the optional
relay to trigger a
boost solenoid, methanol water injection or ignition cutoff.
The Zt-2 Wideband controller will monitor user set
levels triggering the ZAVT-1 Warning/Trigger box and optional relay if one
or a combination of values exceeds limits. Trigger a failsafe condition on
any Zt-2 input including AFR, Boost, RPM, TPS, EGT, Oil/Fuel Pressure, Air/Water
temperatures and more. Create a failsafe gauge/display with the Zt-2 controller
watching both displayed values and any other connected sensors or inputs. This simple
failsafe safeguard is a great way to
protect your engine, hardware and time investment.
Audio-visual warnings and the
fail-safe trigger can be activated using any of the Zeitronix Zt-2 parameters.
Each parameter has user settable levels which the Zt-2 controller will monitor.
Activation can occur through
the following methods:
One or more single parameters exceed limits.
Example: Boost greater than 7 psi or
EGT greater than 1100 F
Complex Warnings: All
parameters listed must exceed values.
Example: AFR greater than 12.6 and
RPM greater than 3500
Both "Simple" and "Complex"
warnings may be used at the same time.
AFR too rich
Detect AFR too rich (AFR below a given value).
AFR too lean
Detect AFR too lean (AFR above a given value).
Note: A combination of AFR too rich
and AFR too lean alarms can be used to tune for a specific AFR window.
Boost too high Detect
boost above a given value.
EGT too high
Detect EGT temperatures above a given value.
RPM too high Detect
RPM above a given value.
NOTE: Create a simple shift-light or use with AFR to detect a lean condition
during performance driving.
TPS too high
Detect TPS above a given value.
USER1 Input too high Detect USER1 input
above a given value.
USER1 Input too low
Detect USER1 input is lower than a given value.
USER2 Input too high Detect USER2 input
above a given value.
USER2 Input too low
Detect USER2 input is lower than a given value.
NOTE: USER1 and USER2 may be connected to oil/fuel pressure sensors, an air
temperature sensor, water/transmission/oil temperature sensor or other 0-5 volt
||ZAVT-1 WIRE COLOR
||Switched +12V Power
||Zt-2 WHITE/BLUE STRIPE
||NEGATIVE SIDE OF RELAY
||Optional Relay Trigger
The Audio Visual Warning and
Trigger Box alarm is activated by the Zeitronix Zt-2 Wideband AFR Meter. A
single Warning Output wire (white with blue stripe) provides the
warning/trigger/fail-safe signal and connects to the ZAVT-1 blue wire.
The audio part of the alarm can be deactivated by adjusting the switch SW1 inside the box.
alarm and a relay trigger are always active.
Open the Zeitronix Logging Software. Connect
the Zt-2 Wideband AFR Meter into a PC COM port and power up the Zt-2. Make sure
the log graphs are shown on the screen. Then open the Warnings and Triggers menu
by selecting "Hardware" then "Warnings:: Setup..." or by
pressing the 'w' key.
Parameters can be
selected for use in a Simple or a Complex Warning.
A Simple Warning will be triggered when any of selected parameters exceed preset warning
A Complex Warning will be triggered when all selected parameters exceed preset warning
In an example below a warning will be activated if the Boost exceeds 7 psi.
A warning will also be activated if the AFR mixture is leaner than 12.5
AND the RPM is greater than or equal to 6500.
Many other warning combinations can be set by using the ZDL software.
The alarms are saved in the Zt-2 flash memory and kept after disconnecting a PC
laptop or disrupting power.
Zt-2s manufactured after Jan 22 2007 have additional alarm duration feature,
which keeps the alarm active after the alarm condition is removed. The alarm
duration can be setup between 0-240 seconds.
The Zt-2 has a single warning output wire. Simple and complex warnings
both activate the ZAVT-1 using this warning output wire.
The Zeitronix ZAVT-1 box
is capable of triggering an optional relay at a preset warning level. Connect
the ZAVT-1 WHITE wire ONLY to the negative side of the relay; otherwise, leave the
WHITE wire unconnected and protected from accidental connection to any other
Relay wire colors correspond to relays purchased from Zeitronix.
ZAVT-1 is compatible with the Zt-2 Wideband
AFR Meter REV 9 or higher. Zt-2s purchased after May 9 2006 are compatible and
support Simple Warnings.
Zt-2s purchased after September 1 2006
support both Simple and Complex Warnings. You can check the Zt-2 compatibility
by accessing the warnings feature in the Zeitronix Data Logging Software Version
2.0.8 or higher. To do this open pen the Zeitronix Logging Software. Connect the Zt-2 Wideband AFR Meter into a
PC COM port and power up the Zt-2. Make sure the log graphs are shown on the
screen. Open the Warnings and Triggers menu (v2.0.18 or choose "warnings setup"
from the "Hardware" menu in the version 3 software. The following message is displayed if
an incompatible Zt-2 AFR Meter is detected. See the
compatibility page for information on a possible upgrade to support this