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False Alarms; Diode wiring 2 sensors to one input

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thefranchise 
Member - Posts: 41
Member spacespace
Joined: August 22, 2002
Location: United States
Posted: October 29, 2002 at 4:26 PM / IP Logged  

I have a aladdin 2k installed on my 2000 Eclipse

Sensors are the dual stage shock sensor and I added on a CS dual stage microwave sensor. 

i applied diodes as one should on each stage line before they join. 

what i am seeing is a sporatic stage 2 false alarm now and then; never stage 1.    (oddly enough i notice them more when the car is parked on a hill for some odd reasons)

i also notice that almost exactly 10 mins everytime i arm the car i decides to go off with a false alarm.   

could the diode size matter here?  what else can be checked. 

kickyride 
Copper - Posts: 100
Copper spacespace
Joined: September 20, 2002
Location: Georgia, United States
Posted: October 29, 2002 at 5:15 PM / IP Logged  
Diode size should around 1-2 amps though it's not really a big deal. Are the sensors near each other? If so, I've seen microwave sensors false when other electronics are too close. Make sure you have a diode for each sensor and each zone (should total to 4 with all of the cathodes facing the alarm). I'm not familiar with aladdin alarms but you may also check to make sure that the alarm's +12 volts and ground outputs for the sensors are beefy enough to handle 2 sensors. After all this, if you still have falsing problems, disconnect each sensor one at a time and see which sensor is causing the problem. That could help indicate if there may be other interference or spikes causing the condition. Other than that, post what kind of car you have and that may help with the 10 minute problem. Hope this helps.
Mike
Sales/Tech Support - KICKYRIDEoCOM mobile electronics
MECP 1st class-Security Specialist
thefranchise 
Member - Posts: 41
Member spacespace
Joined: August 22, 2002
Location: United States
Posted: October 29, 2002 at 10:21 PM / IP Logged  

I have a 2000 Mitsubishi Eclipse

I have replaced the microwave sensor once already with no luck.

i have the microwave sensor pretty far from anything electrical that i can tell; its in the center arm rest.  i've played with various settings but no luck

thefranchise 
Member - Posts: 41
Member spacespace
Joined: August 22, 2002
Location: United States
Posted: October 30, 2002 at 11:25 PM / IP Logged  
btt
Velocity Motors 
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Joined: March 08, 2002
Location: Manitoba, Canada
Posted: October 31, 2002 at 5:34 AM / IP Logged  
Is the perimeter sensor a (-) or a (+) trigger device ?
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
thefranchise 
Member - Posts: 41
Member spacespace
Joined: August 22, 2002
Location: United States
Posted: October 31, 2002 at 7:46 PM / IP Logged  

i believe its a negative trigger.

Velocity Motors 
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Joined: March 08, 2002
Location: Manitoba, Canada
Posted: November 01, 2002 at 5:33 AM / IP Logged  
That's what I thought.... make sure you have the cathode facing the sensor, not the alarm. When you deal with a (-) trigger the anode side faces the alarm and the cathode faces the device.
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
kickyride 
Copper - Posts: 100
Copper spacespace
Joined: September 20, 2002
Location: Georgia, United States
Posted: November 01, 2002 at 10:00 PM / IP Logged  

Ahhhhh......Jeff is correct. Guess I should have thought before I typed :] Thanks for the correction!

Mike
Sales/Tech Support - KICKYRIDEoCOM mobile electronics
MECP 1st class-Security Specialist
Velocity Motors 
Moderator - Posts: 12,488
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: November 01, 2002 at 10:09 PM / IP Logged  
Not a problem.... I too have fallen into this trap but experience has taught me a lesson False Alarms; Diode wiring 2 sensors to one input -- posted image..
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

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