{"id":1202,"date":"2017-10-26T08:18:15","date_gmt":"2017-10-26T08:18:15","guid":{"rendered":"http:\/\/www.ssec.wisc.edu\/aeri\/?page_id=1202"},"modified":"2021-07-28T06:50:34","modified_gmt":"2021-07-28T06:50:34","slug":"m-aeri-rain-sensor-notes-and-troubleshooting","status":"publish","type":"page","link":"https:\/\/www.ssec.wisc.edu\/aeri\/kb\/procedures\/maintenance\/m-aeri-rain-sensor-notes-and-troubleshooting\/","title":{"rendered":"M-AERI Rain Sensor Notes and Troubleshooting"},"content":{"rendered":"<p><strong>External rain sensors<\/strong><\/p>\n<ul>\n<li>Two external rain sensors are installed on the post on the railing<\/li>\n<li>Blue Vaisala rain sensor\n<ul>\n<li>Works in cold weather, heather can melt ice off the surface<\/li>\n<li><kbd>externalRainDetectorSensor<\/kbd> (in FTSW Status list) displays a voltage proportional to precipitation level:\n<ul>\n<li>3V = very dry<\/li>\n<li>2V = very wet<\/li>\n<\/ul>\n<\/li>\n<li>Hatch is triggered based on internal logic output:\n<ul>\n<li><kbd>outsideRainSensor=1<\/kbd> for no precip detected<\/li>\n<li><kbd>outsideRainSensor=0<\/kbd> for precip detected<\/li>\n<\/ul>\n<\/li>\n<li>Sensor may be sensitive to salt deposition\n<ul>\n<li>Symptoms are:\u00a0 Hatch is closed when it&#8217;s not precipitating AND <kbd>outsideRainSensor=0<\/kbd> &amp; <kbd>externalRainDectector &lt;~2.8V<\/kbd><\/li>\n<li>The solution is to clean the blue surface of the sensor with distilled water (or wipe down with kimwipe if needed, or use alcohol if needed)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>Optical rain sensor\n<ul>\n<li>Should be immune to salt deposition<\/li>\n<li>Does not output a voltage: <kbd>internalRainDetectorSensor=0V<\/kbd> (in FTSW Status list)<\/li>\n<li>Hatch is triggered based on internal logic output:\n<ul>\n<li><kbd>insideRainSensor=1<\/kbd> for no precip detected<\/li>\n<li><kbd>insideRainSensor=0<\/kbd> for precip detected<\/li>\n<\/ul>\n<\/li>\n<li>Not rated for freezing temperatures.\u00a0 Heater is not strong enough to melt ice on the surface<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>Switching external rain sensors<\/strong><\/p>\n<ul>\n<li>Either the Blue Vaisala or Optical rain sensor can be used or not used by connecting or disconnecting it to the cable<\/li>\n<li>If a rain sensor is consistently not behaving well in a given set of conditions, it can simply be disconnected<\/li>\n<li>Move the wind shield over to the active rain sensor (single hex screw)<\/li>\n<li>In this case a new\u00a0<kbd>MonitoringConfig.xml<\/kbd> file can be installed if desired, so that the FTSW Monitoring display is matched to the rain sensor. \u00a0Contact mentor for this<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>External rain sensors Two external rain sensors are installed on the post on the railing Blue Vaisala rain sensor Works in cold weather, heather can melt ice off the surface externalRainDetectorSensor (in FTSW Status list) displays a voltage proportional to precipitation level: 3V = very dry 2V = very wet Hatch is triggered based on [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":0,"parent":22,"menu_order":4163,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-1202","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.ssec.wisc.edu\/aeri\/wp-json\/wp\/v2\/pages\/1202","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ssec.wisc.edu\/aeri\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ssec.wisc.edu\/aeri\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ssec.wisc.edu\/aeri\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ssec.wisc.edu\/aeri\/wp-json\/wp\/v2\/comments?post=1202"}],"version-history":[{"count":2,"href":"https:\/\/www.ssec.wisc.edu\/aeri\/wp-json\/wp\/v2\/pages\/1202\/revisions"}],"predecessor-version":[{"id":2143,"href":"https:\/\/www.ssec.wisc.edu\/aeri\/wp-json\/wp\/v2\/pages\/1202\/revisions\/2143"}],"up":[{"embeddable":true,"href":"https:\/\/www.ssec.wisc.edu\/aeri\/wp-json\/wp\/v2\/pages\/22"}],"wp:attachment":[{"href":"https:\/\/www.ssec.wisc.edu\/aeri\/wp-json\/wp\/v2\/media?parent=1202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}