Dynon Avionics EMS-D10 Installation Guide - Manual (Page 67)

EMS-D10 Installation Guide 7-1
7. APPENDIX
This appendix contains additional information pertaining to the installation of the EMS-D10.
You will find here the optional capacitance fuel level converter guide, and a table of weights,
specifications.
Appendix A: Capacitance-to-Voltage Converter Installation
Dynon Avionics’ capacitance-to-voltage converter is
suitable for general use with most capacitive plate fuel
level sensors. It accepts an input via a female BNC and
outputs a dc voltage signal that can be read by the EMS-
D10. It requires 10 Vdc to 15 Vdc for power and draws
minimal current. We recommend that you connect the
capacitance-to-voltage converter to the EMS for power as
shown in the table below, but it will also work properly
when connected directly to standard 12 volt aircraft
power. If your aircraft runs on 28 volt power, you must connect the capacitance-to-voltage
converter to the EMS for its power source. Voltage inputs higher than 15 volts will damage the
device.
GENERAL INSTALLATION RECOMMENDATIONS
Connect the female BNC to the
male BNC provided with your
capacitive fuel level sensor.
Connect the wires as shown in the
table to your EMS-D10. If you
need to extend the wire beyond the
supplied length, we recommend
avionics grade 22 AWG wire with
Tefzel® type insulation.
Refer to the 37-Pin Female EMS
Harness section on page 2-3 for
EMS pin out information when
connecting this product to your EMS-D10.
You must configure the fuel level sensor type on your EMS-D10 to capacitive sender before
calibrating this product. Refer to the Fuel Level configuration section on page 5-11 for fuel level
sender type configuration and page 5-5 for fuel level sender calibration.
Once the system is calibrated for a certain type fuel, only that fuel may be used and the
aircraft should be placarded for such. For example, ethanol has a dielectric constant much
different than 100LL or Auto Fuel. If calibrated for 100LL, then by using Auto 10%
Ethanol in the tanks the indications could be off by 50%.
Wire EMS DB37
Pin#
Function
Black 5, 16, or 17 Ground
White 20 (fuel level 1)
21 (fuel level 2) Capacitance converter
output to EMS fuel level
input (0 Vdc to 5 Vdc)
Red 15 12 Vdc Power (normally
used for fuel flow)