---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 05/31/14: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:29 AM - Re: testing a coax lead (Robert L. Nuckolls, III) 2. 08:37 AM - Re: Info on MGL Enigma (Jay Hyde) ________________________________ Message 1 _____________________________________ Time: 07:29:50 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: testing a coax lead Shoot me your mailing address and I'll get some connectors in the mail to you today. Sorry, I tought I had some rt-angle connectors in inventory . . . I'm out. Here's the source I've used for years http://tinyurl.com/mfp9cfg takes awhile to get parts but they've been consistently good. I've just ordered 10 to refurbish my inventory. http://tinyurl.com/m6ywj9p Depending on how 'tight' you are for schedule, I can offer connectors in when my order gets here . . .will only take a few days longer than ordering for yourself . . . Bob . . . Bob . . . ________________________________ Message 2 _____________________________________ Time: 08:37:37 AM PST US From: "Jay Hyde" Subject: RE: AeroElectric-List: Info on MGL Enigma I have forwarded this to my colleague, who happens to own MGL J. I call him on Monday to follow up. Jay From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Richard Girard Sent: 31 May 2014 12:26 AM Subject: AeroElectric-List: Info on MGL Enigma While trying to fathom why the CHT readings on the MGL Enigma EFIS had stopped on my friend's Rotax 912 powered JA Highlander I delved into the manual for the EFIS and its RDAC unit (the box that all senders report to before their data is passed along to the EFIS). On page 6 or so of the RDAC manual there is a picture of the back of the Enigma with a note that the battery under a rectangular cover should be changed every two years. Upon removing said cover I discovered a CR2032 lithium battery. I checked its voltage output and found it to be 2.9 volts. A new one that the aircraft owner just happened to have in his tool kit (he maintains medical equipment for a living) put out 3.3 volts so we replaced the old one. More investigation into the setup menus for EFIS revealed that there is an option for a Rotax sender for the CHT setup and when we checked the unit we found it had reset to a J type thermocouple. Resetting it to the Rotax sender solved the problem and the EFIS began reporting good CHT values. Curious to find out if the low output of the CR2032 was responsible for the glitch in the CHT setup I delved into the manual for the EFIS and could find no reference to it in the manual's table of contents, index, or during a long skim of its contents. The same was true of the RADC manual with the exception of the picture and note mentioned earlier. Now we find that the same thing has happened to the oil pressure reading. Again the setup has been changed to reflect a different type of sender, only this time restoring it to the Rotax sender option has not fixed it. There are two sender options for each of resistive type senders and voltage type. On either resistive option (the Rotax option is a resistive sender) the bar graph on the EFIS locks up and does not read. When I set it to either of the voltage type it then reads but it reads backward, i.e. as the engine revs up the reading drops and vice versa. The oil pressure sender is a VDO unit and I have located it in VDO's technical offerings online. VDO recommends that the sender be installed dry with no teflon tape or thread sealant so that it will ground properly so we have an investigative path when we return to the airplane this weekend. MGL has taken the Enigma technical info off line and the aircraft's owner has not been able to find any information on the CR2032 battery as to what it does or how to change it properly. Does anyone out there know about it? Thanks, Rick Girard It isn't necessary to have relatives in Kansas City in order to be unhappy. - Groucho Marx ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.