Additional Resistive Fuel Level Sensors

[autenp]

On Page 7-10 in the SV-EMS-220 Installation and Configuration Instructions shows pin 20 and 21 were used to measure resistive fuel level for the left and right tank.

1. What does general purpose input 9 and 10 means?
2. What does Sensor Configuration A, B and C means when looking for additional unassigned pins?
3. Which other general purpose pins can I use on the DB37 for two additional resistive fuel level sensors?
4. How do I adjust the software to assign this new function to the chosen pins, calibrate them, and change the display to show all 4 tanks with filling level on the SkyView display?

I guess it shows. . . . I am a novice at this!!, Please Help -- Peter

 

[dynonsupport]

Peter:

This is all explained in the SkyView System Installation Guide. With each revision, we try to fix any "bugs" we find with the documentation and improve the way we describe things. So, first thing is to obtain an up-to-date SkyView System Installation Guide. The most recent is always available at http://docs.dynonavionics.com.

Builders sometimes zero in on the individual, suggested EMS configurations, like "Example Lycoming/Continental 4-cylinder Carbureted" on Page 7-10. But when you have questions like #3, it's probably more useful to look at the non-specific explanations of the 37-pin connector, such as Table 15 on Page 7-6 and 7-7. There you see ALL the General Purpose inputs listed. Compare that against the "Example" configuration for your particular engine, and you can see which General Purpose Inputs aren't already "spoken for" and which are thus available for use.

1. We have a total of 13 General Purpose inputs on the SV-EMS-220 37-pin connector. So, #9 and #10 are the 9th, and 10th such inputs, out of a total of 13.

2. Refer to Table 14 on Page 7-5 (Revision I - latest) of the SkyView System Installation Guide for an explanation of what Type A, Type B, and Type C refers to. Basically, it's explain compatibility with various types of sensors.

3. ANY of the 13 General Purpose Inputs can be used for additional resistive fuel level sensors.

4A. SETUP > EMS SETUP > SENSOR INPUT MAPPING.
4B. SETUP > SENSOR SETUP
4C. SETUP > HARDWARE CALIBATION > (submenus vary by sensor. Only necessary for sensors requiring calibration.
4D. SETUP > EMS SETUP > SCREEN LAYOUT EDITOR

 

[Edwardoc]

:My EMS was preconfigured for resistance fuel sensors on pins 20 & 21 and I went into the sensor mapping page and marked them as unused and mapped pins 22 and 31 for capacitance sensors. When I exited and went to the ENG page both fuel levels had red Xs through them and the words CFG? above them. No where did the install manual mention IN THE CAPACITIVE FUEL LEVEL SECTION ABOUT GOING to the Screen Layout editor TO delete the widgets associated with pins 21 & 22 and load widgets for pins 22 & 31. It took a lot of searching before I finally figured it out. Mentioning that somewhere in the section on installing capacitance fuel sensors would have made it much simpler to figure it all out.
On page 7-34 of the Nov/11 install manual, there is a statement " Be sure to configure the firmware to recognize the capacitive fuel level sensor on the enhanced general purpose inputs. What is this referring to??? Also when referencing Dynon's Cap to Voltage converter please put the section or page numbers in the reference. Section 14 accessory installation section

 

[dynonsupport]

Thanks for the comment. We've worked in a note that should help in the next manual revision.