digi-tech AA-0374 User manual

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UserManual
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Fuel Mixture Display
Module for Cars
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AA‐0374
Distributed by:
TechBrands by Electus Distribution Pty. Ltd.
320 Victoria Rd, Rydalmere
NSW 2116 Australia
Ph: 1300 738 555
Int’l: [phone]
Fax: [phone]
www.techbrands.com

TechnicalSpecifications:
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Power:12VDC
Dimensions:81(L)x51(W)x22(H)mm
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Instructions:
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Readthroughalltheinstructionsbeforeusingthe
module.
Connectthemoduleaccordingtothewiringdiagram.
Incorrectwiringwilldamagethemoduleandyour
vehicleifyouconnectitintheincorrectpolarity.
Theeasiestwayofcalibratingthemoduleisonthe
road,butisnotappropriateforacarthatisheavily
modified.Foramodifiedcar,useachassisdyno.
Calibratingontheroad:withanassistantinthe
passengerseatandwiththeengineuptooperating
temperature,driveataconstantspeedwithasteady
throttleopening.ThelitLEDshouldstartoscillatingup
anddownthedisplay,astheECMmakesthemixtures
alternativelyrichandleaninclosedloopoperation.
AdjustthetrimpotVR1sothattheoscillationsineither
directionaresymmetricalaroundthemiddleLED.Itis
nowreadyforuse.
NOTE:Atidle,themixturedisplayshouldagainshow
theclosedlooposcillations.
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Calibratingonacarthatisheavilymodified:in‐car
calibrationcanstillbedonewiththeprovisothatthe
mixturesmaybeallwrongtostartwith.Thesafest
approachistouseachassisdynoandanexhaustgas
analyzersothatthemixturedisplaycanbecalibrated
accordingtothegasanalyser’sreadout.
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LEDscanalsobeattachedtothemodulewithfly
leadsifyouwouldliketointegrateitintoyour
vehicle’sdashboard.
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Notes:
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Nevergetanypartofthemodulewet.
Neverattempttoopen,modifyorrepairanypartofthe
module.
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WiringDiagram:
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