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FAA APPROVED
INSTALLING THE EGT-701 SCANNER®
Fuel Flow Units (Fuel Flow Option)
Selects the units in all parameters where fuel quantity or fuel rate is displayed. If you change this parameter, it does not change the
numerical value of the fuel tank capacity. You must do this manually. For example if you change from Gal. to Lbs., the tank
capacity will be interpreted as 50 Lbs. rather than 50 gallons; the EGT-701 will not convert 50 Gal to equivalent pounds.
Main Tank Capacity (Fuel Flow Option)
Enter the total capacity of the main tanks in the fuel flow units selected. If you have tank tabs (but no auxiliary tanks) and
sometimes fill only to the tabs, set the main tank capacity to the capacity up to the tabs.
Auxiliary Tanks (Fuel Flow Option)
If you do not have auxiliary tanks or tank tabs, answer "No." If you answer yes, you will be asked to input the capacity of the
auxiliary tanks in the fuel flow units selected. If you have tank tabs and sometimes fill only to the tabs, set the auxiliary tank
capacity to the difference between full tank capacity and tab capacity.
Low Time Alarm Limit (Fuel Flow Option)
Select the value of the time remaining, in minutes, that triggers the alarm. Time remaining is calculated at the current fuel flow
rate.
Low Fuel Alarm Limit (Fuel Flow Option)
Select the value of the fuel remaining, in the selected fuel flow units, that triggers the alarm. Fuel remaining is calculated at the
current fuel flow rate.
Carburetor? (Fuel Flow Option)
Different response filters are used depending on whether your engine is carbureted or fuel injected. The filter for a carbureted
engine has a slower response time to reduce sudden fluctuations in readings.
29) Troubleshooting
a) A missing column in the display on start up indicates that the diagnostic routine has found an open
wire or probe with a poor connection. The error message will indicate which channel to examine.
b) A missing column in the display during flight indicates a widely varying or erroneous temperature
value. The probe is deleted from the indexing to prevent false alarms.
c) Start up OPEN PRB message. If one of the temperature probe circuits is open, the display indicates
OPEN PRB followed by one of these messages: EGT 1, EGT 2, EGT 3, EGT 4, EGT 5, EGT 6, EGT 7,
EGT 8, EGT 9, CHT 1, CHT 2 , CHT 3, CHT 4, CHT 5, CHT 6, CHT 7, CHT 8, CHT 9, OIL, IND, OAT,
TIT. Check the connector at the instrument and verify that a female pin is not recessed in the connector.
Check the crimps where the probe is connected to the wiring harness.
d) A negative reading (- in front of the number) indicates reverse polarity on the red and yellow
thermocouple wire to probe.
e) Ohmmeter check. Remove the connector from the rear of the instrument and measure the resistance
of the probe lead pairs. The reading should be about 10 ohms. At the connections between the probe
and the wiring harness in the engine compartment, the resistance should read about 2 ohms.
f) All readings varying rapidly. Verify that the Instrument is grounded at the engine block for single
engine installations. If an adapter probe is being used insure that it is screwed in tightly and grounded.
Remove the factory original probe that is in the adapter and note if problem is resolved. If so an ohm
ground exists between the engine and the adapter probe.
INSTALLATION MANUAL FOR THE EGT-701 Report 103
1/20/09
Rev-E
Page 20 of 30
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