Sonex Electric Instrument Installation Instructions

Sonex Aircraft, LLC

PO Box 2521
Oshkosh, WI 54903-2521
[phone]
Fax: [phone]
www.sonexaircraft.com

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SONEX/ELECTRIC INSTRUMENT INSTALLATION NOTES 4 pages

Letter Ref: SNX-ELIN-102708

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Congratulations on your Electronic Instrument Purchase. The following notes are
provided for your reference as you set up your Electronic Instrument in your
Sonex, Waiex, or Xenos.

Where any conflict exists between this sheet and the instructions provided with
your Instrument, follow the instructions provided with your instrument:

1. CHT Probe Installation: We recommend using the Sonex CHT Probes
available for purchase directly from Sonex Aircraft. Refer to the Engine FWF
Documentation for more information on the monitoring of your CHT’s. Note that
both Type J and Type K versions of these probes are available.

Typical CHT Probe from Sonex

Typical CHT Probe Installation

2. EGT Probe Installation:
Make sure your probe is installed 4 inches down from the top of the exhaust
stack flange. Most EGT Probes are Type K. Refer to the Engine FWF
Documentation for more information on the monitoring of your EGT Probes.

3. Sonex Fuel Level Probe: Your Sonex-Specific Stratomaster Fuel Level Probe
is set up to simulate a Resistive (ohm) output to your instrument as the fuel level
changes. The Sonex-Specific EIS Fuel Level Probe is set up as a Capacitive
output to your instrument. Follow the instructions provided with both the probe
and instrument carefully. For your information, we are providing our factory
installation procedure for Stratomaster Instruments:

From the Fuel Level Probe "Black Box":
Hook up the Green Wire to the Stratomaster Fuel Level Input on the RDVAC, the
Red Wire to +12V, and the Black Wire to Ground.

The programming in the Stratomaster Unit makes you put 1.3 Gallons in the tank,
which it then will interpret as your empty level. This gives you a reserve of fuel
and additional safety measure of fuel when Stratomaster is reading empty. We
Started with an empty fuel tank and added 2 gallons of fuel and set Fuel Tank
capacity at 1.3 Gallons by hitting "Select" with the Current Output Reading (for
us, this reading was 1920 Ohms). We then set our "fuel low" alarm at 2.0
Gallons, which gives us more than a 1/2 hour reserve once the alarm goes off.
Follow the Instructions on Page 55 of your manual to calibrate your sensor.

Our calibration used the following Resistive Outputs:

0.0 Gallons (1.3 Gallons) 1920 Ohms

2.9 Gallons 1869 Ohms

5.8 Gallons 1804 Ohms

8.9 Gallons 1757 Ohms

11.8 Gallons 1703 Ohms

15.06 Gallons 1651 Ohms