J.P. Instruments EDM 930 Primary Pilots Guide - Manual (Page 6)

Section 1 - Getting Started
Important Note!
You must have the remote auxiliary display—RAD— installed
on the instrument panel of your aircraft. This is required for FAA
certification of the EDM-930 as a primary instrument. Upon start
up, the RAD displays the make and model of you aircraft, which
must be verified before you can rely on the EDM-930 for use as
the primary engine instrument cluster. The RAD also will
continuously notify you of any alarm conditions, regardless of
whether you have cleared them on the EDM-930 display.
This is not an option!
This is a summary of basic operation. Detailed descriptions of all
operations appear later in this Pilot’s Guide.
EDM-930 primary instruments have preset alarm limits and cautionary
ranges (user cannot change them) typically for the following
measurements: oil temperature, oil pressure, fuel pressure, fuel quantity,
cylinder head temperature, turbine inlet temperature, manifold pressure,
and RPM. Your EDM-930 contains a custom Key Card. For Primary
configurations, the Key Card activates the primary engine instrument
abilities of your engine monitor.
Note: Fuel quantity gauges must be calibrated to the aircraft and will not
be functional until the fuel calibration process has been performed.