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Re: Alarm Stays On



On Fri, 08 Jun 2012 21:20:00 -0500, G. Morgan
<sealteam6@xxxxxxxxxxxxxxxxx> wrote:

>clare@xxxxxxxxxxxx wrote:
>
>>On Fri, 08 Jun 2012 18:40:36 -0500, G. Morgan
>><sealteam6@xxxxxxxxxxxxxxxxx> wrote:
>>
>>>clare@xxxxxxxxxxxx wrote:
>>>
>>>>Being obtuse again, eh??
>>>>The unit was replaced. Always possible the first one was defective and
>>>>the new one reversed, no??
>>>
>>>The sensor was replaced, not the control panel.  That is what
>>>needs to be upgraded.
>>>
>>>Over 30 years, that thing has served it's purpose and was obsolete
>>>20 years ago!
>>
>>
>>  I was not talking about the control panel - which appears to be
>>working just fine, according to the OP's testing.  Not saying
>>replacing it might not be a good idea - but I doubt (not saying I know
>>it definitely is not) it is the panel at fault.
>>
>>My thought right now is that he has possibly not removed the jumpers
>>on the integrated EOL resister pack on the new SENSOR.
>>
>>That "dynosaur" panel is pretty simple, and pretty reliable. If the
>>resistance is other than 2.2K ohms or zero (within tolerances) the
>>panel "faults" and if the resistance is 2.2 K it alarms, and if it is
>>zero it says "all's well". Basically a voltage devider circuit with a
>>couple of comparators. If the resistance is too high, the voltage
>>across the "reference" resistor goes too low. If the resistance of the
>>string is too low, the voltage across the "reference" resistor goes
>>high. Either condition trips the comparator
>> If he has ANY jumpers installed the resistance will not be 2.2 K when
>>the contacts open. And with the sensor removed and jumpered, the
>>system will work just fine - as his does.
>>
>>I believe I made one error on my last post. I believe I said if he had
>>the sensor jumpered to 2.2K the panel would see 4.4K ohms with the
>>contacts open. In this setup, it would see 1.1K ohms with the contact
>>opened, because the resistors would be in PARALLEL, not series.
>>
>
>
>Bwahahahahaha!!!
>
>Why did you remove my x-post?
 I didn't you jackass. I didn't READ your other (ignorant) post before
posting this one.


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