temperature sensor

AllStarLink
1

Hi All,

I am having a problem with the hot weather shutting down a repeater. I would
like to know if anyone has any way of monitoring the ambient temperature in
the room as well as the surface of a heat sink and then triggering an event
in app_rpt when they exceeded a certain threshold.

Thanks,
Scott KB2EAR

2

The simplest would be to mount a thermal switch on the heatsink. When it closes fire a GPI.

Something like this at the temp threshold that you want to alarm:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=3455RC%2001000247-ND
Find out the temp were it’s failing now, and select a switch maybe 5 or 10 degrees lower.

For the room temp, maybe a plain old thermostat tripping a different GPI.

Using one for AC/HEAT would give you high and low trip points.

This would at least give you some alarms.

Bob

WB3AWJ

···

From: “Scott Weis” kb2ear@kb2ear.net
I am having a problem with the hot weather shutting down a repeater. I would
like to know if anyone has any way of monitoring the ambient temperature in
the room as well as the surface of a heat sink and then triggering an event
in app_rpt when they exceeded a certain threshold.