J.P. Instruments EDM 960 Twin Primary Installation Manual - Manual (Page 21)

FAA Approved Installation Manual for the EDM-960 system Report No 909
Primary Engine Data Management System Page 21 of 46 Rev D
Date 2-6-2014
WARNING:
 Never add or remove fuel from the aircraft when the
master switch is turned on.
 Fuel quantity gauge performance is affected by many
factors, such as the integrity of the sensor performance, the
accuracy of the calibration data you collected and entered
and most importantly your validation that the EDM fuel
quantity gauge is accurate and repeatable after installation
and calibration. You should not use the fuel quantity gauge
system for any flight related operations until this validation
criteria has been met.
28.3 Fuel Tank Calibration
Setting Fuel Calibration Points
The EDM interfaces to various fuel level sensor types to facilitate direct reading of the fuel level in the
aircraft fuel tanks. The EDM has a multi-point fuel calibration table that you must enter. This table contains
calibration values (stored in non-volatile memory) used to translate sensor readings into the displayed fuel
quantity values. The calibration information is collected and recorded on paper for later entry into the EDM.
NOTE: Fuel quantity gauges will not be functional until the fuel calibration information has been entered
into the EDM. You will use the EDM instrument itself as the measuring device to collect calibration data.
The following describes the basic procedures necessary for collection and entry of data into the fuel level
calibration table. Note: Any changes to fuel table data will be temporary until you execute the ’SAVE’
function (available after last cell of the last tank table is entered).
Before beginning the fuel table entry/edit process, you must have properly installed and tested for correct
functionality of the fuel sensors.