{"id":2845,"date":"2011-05-04T15:38:53","date_gmt":"2011-05-04T19:38:53","guid":{"rendered":"http:\/\/www.engineeringradio.us\/blog\/?p=3928"},"modified":"2023-04-30T12:45:28","modified_gmt":"2023-04-30T16:45:28","slug":"temperature-sensor-for-burk-remote-control","status":"publish","type":"post","link":"https:\/\/www.engineeringradio.us\/blog\/2011\/05\/temperature-sensor-for-burk-remote-control\/","title":{"rendered":"Temperature Sensor for Burk Remote Control"},"content":{"rendered":"\n

As a part of the re-wiring of a transmitter site, I realized that the site needed a temperature sensor.  I believe it is important for any remote transmitter site to have a temperature sensor, too many things can go wrong at a transmitter site.<\/p>\n\n\n\n

I recall one incident at WGNA-FM in Albany, NY where a ventilation fan failed on a hot summer day. \u00a0The Harris HT-10 transmitter stayed on the air while the temperature climbed through 160 degrees inside the building, finally shutting down when the solid-state driver module failed. \u00a0This site had a temperature sensor and a live operator taking transmitter readings every three hours. \u00a0They faithfully logged the temperature increase in three-hour increments but didn’t call anyone until the station went off. \u00a0When I arrived there, it was so hot inside the building that I couldn’t touch a metal surface.<\/p>\n\n\n\n

For the present-day project, I looked at the Burk BTU-4, which seemed a little pricey. \u00a0After doing a bit of quick research, I found the National Semiconductor LM34 a good alternative. \u00a0This unit puts out 10 mv\/degree F, which can be directly calibrated to a metering input of an ACR-16 using the Lin scale. \u00a0 I checked the accuracy by using a piece of melting ice, it was right on. \u00a0The design and implementation are very simple:<\/p>\n\n\n\n

\"LM34<\/a>
LM34 temperature sensor<\/figcaption><\/figure>\n\n\n\n

The LM34 is available in TO-46 or TO-92 case.  I bypassed the V+ with a 0.01uf capacitor.  It should be mounted in a small box with the case of the LM34 mounted on a metal cover or heat sink.  The TO-46 version, the case is ground.  It can be run on any voltage from +5 to +30 VDC, I used +5 because I had a little wall wart with the right voltage.  The wire is any type of balanced audio wire like Belden 8459, etc.  The LM34 cost 4 dollars, the rest of the parts were laying around.  It took about 15 minutes to create.<\/p>\n\n\n\n

The site is air-conditioned, therefore I set the remote control to alarm if the temperature goes above 85 degrees F inside the building.<\/p>\n","protected":false},"excerpt":{"rendered":"

As a part of the re-wiring of a transmitter site, I realized that the site needed a temperature sensor.  I believe it is important for any remote transmitter site to have a temperature sensor, too many things can go wrong at a transmitter site. I recall one incident at WGNA-FM in Albany, NY where a … Continue reading Temperature Sensor for Burk Remote Control<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[204],"class_list":["post-2845","post","type-post","status-publish","format-standard","hentry","category-tech-stuff","tag-remote-control"],"_links":{"self":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/2845","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/comments?post=2845"}],"version-history":[{"count":5,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/2845\/revisions"}],"predecessor-version":[{"id":11815,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/2845\/revisions\/11815"}],"wp:attachment":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/media?parent=2845"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/categories?post=2845"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/tags?post=2845"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}