Electronics International CGR-30P - Manual (Page 13)

1.2 Operational Overview:
The CGR system measures a primary engine or aircraft function using a probe or transducer and displays that
function on the CGR screen using the following steps:
A. A probe is mechanically connected to the aircraft and electrically connected to an EDC input. The
pre-wired harness provides most of the electrical connections from the probes to the EDC inputs.
B. The EDC converts the signals from the probes to a digital format and sends the data to the CGR
through the serial bus. The EDC has 33 inputs. Many of these inputs can be used to monitor various
types of functions.
C. The CGR receives the data from the EDC and the data is processed through the CGR as follows:
1. A Function is created in the CGR and is linked to an EDC input.
2. The function is assigned a screen location onto the Main or System Screen of the CGR.
3. Calibration, units, redlines, limits etc. are assigned to the data coming into that function.
Much of the setup for the certified CGR is done at the factory and cannot be changed by the pilot or installer.
See the following Password Protection Section for more information.
1.3 Installation Overview:
For a twin engine installation refer to appendix A8.0. The installer should start the installation by reviewing
the CGR and EDC Wiring Work Sheets. There are four work sheets, one for each of the 37-pin D-Sub con-
nectors on the EDC and one for the CGR. The work sheets are packaged with each of the three EDC wire
harnesses and one for the CGR. The work sheets provide a list of the functions and probes/transducers
included with this kit. The installation is achieved by performing the following steps:
A. The CGR display is installed. The CGR is mounted from behind the instrument panel in a standard
3 1/8" hole.
B. Probes and Transducers are installed.
C. Control Panels, Pots and Warning Lights are installed.
D. The EDC is installed. The EDC should be installed on the inside of the cockpit or in an instrument
bay. For a twin-engine aircraft it can be installed on the backside (not the engine side) of the firewall.
E. The Wire Harnesses are installed. The wire harnesses for the EDC and CGR are pre-wired and in-
cluded in the kit.
F. Field Calibration/Setup steps are performed. If installed Fuel Tanks are calibrated/setup. Calibration/
Setup requires a password. See the following Password Protection section for more information.
G. System Checkout is performed.
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