SV-EMS-220/221 Installation and Configuration
7-60 SkyView System Installation Guide - Revision AA
FUEL LEVEL (RESISTIVE) – averages changes in fuel level over 1.5 minutes, with most of
the change occurring within the first minute). This is a change from previous versions of
this setting, and is the default setting.
FUEL LEVEL (RESISTIVE FASTER RESPONSE) – averages changes in fuel level over 15
seconds, with most of the change occurring within the first 7 seconds.
FUEL LEVEL (RESISTIVE SLOWER RESPONSE) – averages changes in fuel level over 7
minutes, with approximately 2/3 of the change occurring within the first 3 minutes.
Choose the option which provides your preferred responsiveness to actual fuel level changes.
For example, FUEL LEVEL (RESISTIVE SLOWER RESPONSE) might be preferred for an acrobatic
aircraft where the (measured) fuel level changes rapidly in maneuvers that would otherwise
trigger a low fuel level alert.
Capacitive Fuel Level Sensors
Capacitive fuel level sensors such as those made by Princeton Electronics are only supported on
pins 8, 22, 23, and 31 on the SV-EMS-220/221 D37. Capacitive sensors must output a variable
voltage within the ranges of 0-5 volts DC.
First, connect the sensor with power according to the manufacturer’s instructions.
If the capacitive fuel level sensor requires its own calibration, perform that
calibration before performing the SkyView fuel level calibration.
Configure the pin you use:
SETUP MENU > EMS SETUP > SENSOR INPUT MAPPING > C37 Pxx (8, 22, 23, or 31).
Beginning in SkyView Software v13.0, with SkyView Sensor Definition File Revision 46371 dated
2015-07-16 (and later) you can choose the following options under SENSOR:
FUEL LEVEL (CAPACITIVE) – averages changes in fuel level over a few minutes. This is a
change from previous versions of this setting.
FUEL LEVEL (CAPACITIVE SLOWER RESPONSE) – averages changes in fuel level over
approximately 3x the time of FUEL LEVEL (CAPACITIVE).
Choose the option which provides your preferred responsiveness to actual fuel level changes.
For example, FUEL LEVEL (CAPACITIVE SLOWER RESPONSE) might be preferred for an acrobatic
aircraft where the (measured) fuel level changes rapidly in maneuvers that would otherwise
trigger a low fuel level alert.
If your electrical system / startup procedure applies power to SkyView before
applying power to the capacitive fuel level sensors, when first powered up, SkyView
will “sense” a fuel level of 0. If the FUEL LEVEL (CAPACITIVE SLOWER RESPONSE) is
selected, the fuel level will not display the actual fuel level for as long as 7 minutes
after applying power. You can either change your startup procedure to apply power
to the capacitive fuel level sensors before applying power to SkyView, or select
FUEL LEVEL (CAPACITIVE).
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