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Conference terri::cars_uk

Title:Cars in the UK
Notice:Please read new conference charter 1.70
Moderator:COMICS::SHELLEYELD
Created:Sun Mar 06 1994
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2584
Total number of notes:63384

1376.0. "Faulty alarm, advice sought" by AYOV24::RGELVIN () Thu Feb 28 1991 15:54

     Last week I bought a Sparkrite SR90 car alarm plus the ultrasonic
     detector module for movement detection inside the car. I installed
     it in a couple of hours and it worked first time. However after
     driving the car to a friends house last Saturday I activated the
     alarm and after the arming period was over the alarm triggered
     immediately. I eventually found that the ultrasonic module was
     triggering the alarm but when it was cold inside the car i.e after
     leaving it for a while the alarm again worked perfectly. I have
     reduced the sensitivity to the point that movement just inside
     the hatch does not trigger the detector but the alarm still triggers
     after the inside of the car heats up. The current sense circuitry
     works perfectly.
    
     Has anyone else had this problem with the Sparkrite SR901 ultrasonic
     detector, have I missed something obvious or have I just bought
     a faulty, heat sensitive module? 
    
     Thanks in advance for the advice
                                     Richard
T.RTitleUserPersonal
Name		DateLines
1376.1Obvious AnswerHUGS::AND_KISSESNashua girls are more fun...Thu Feb 28 1991 16:155
Why not ring Sparkrite customer support and see what they say?

(I presume there is a customer support number in the alarm instruciton book?)

Scott
1376.2Sparkrite NumberRDGE13::MADGEFri Mar 01 1991 15:4014
    Hi,
    
    I had similar problem,  but adjusting the sensitivy worked a treat for
    mine..
    
    I did talk to Sparkrite however, they seemed helpful enough..
    
    Phone number - 0429-862616
    
    regards
    
    
    Jon
1376.3Problem Solved AYOV24::RGELVINMon Mar 04 1991 10:3115
    
    Thanks for the suggestions. I already talked to Sparkrite and they
    asked if I had tried adjusting the sensitivity. I told them I had
    and that even when the sensitivity was such that movements in the
    rear seat did not trigger the alarm the device still triggered once
    the interior of the car was warm and the alarm then armed. The
    strange thing was that the triggering was not accompanied by the
    green light flashing indicating a false detection of movement. 
    
    I eventually took the ultrasonic detector module back to my local
    supplier and he swapped it. The new detector has been working since
    Saturday with no problems.
                                                        
    Thanks for the advice,
                          Regards Richard
1376.4SolutionPAKORA::JMURPHYgee's a brek....Fri Nov 22 1991 03:325

      I had a similar problem with Sparkrite and there Ultrasonic 
    Detector. After much investigation and getting nowhere, I decided to 
    sell my Car and bought a Saab as this wouldn't require an alarm.