23
G.
G.
G.
G.
G. If the flow tranducer is hard mounted to a bracket, DO NOT connect the Black Gound
DO NOT connect the Black Gound
DO NOT connect the Black Gound
DO NOT connect the Black Gound
DO NOT connect the Black Gound
Wire
Wire
Wire
Wire
Wire on the flow transducer. The bracket will provide the necessary ground to the transducer.
You may want to consider using some fittings and hoses shown below. Note: DO NOT EXCEED a
DO NOT EXCEED a
DO NOT EXCEED a
DO NOT EXCEED a
DO NOT EXCEED a
torque of 15 ft. lbs. or screw the fittings tighter than two full turns past hand tight,
torque of 15 ft. lbs. or screw the fittings tighter than two full turns past hand tight,
torque of 15 ft. lbs. or screw the fittings tighter than two full turns past hand tight,
torque of 15 ft. lbs. or screw the fittings tighter than two full turns past hand tight,
torque of 15 ft. lbs. or screw the fittings tighter than two full turns past hand tight,
whichever happens first.
whichever happens first.
whichever happens first.
whichever happens first.
whichever happens first.
Important Note:
Important Note:
Important Note:
Important Note:
Important Note: Aluminum fittings should only be used when flex lines are mounted on the inlet
and outlet ports of the flow transducer. Otherwise, steel, SS or brass fitting should be used.
2.10 Install the EI P-300C Fuel Level Probes (OEM or Expermintal Only):
Install the P-300C (Capacitive) Fuel Level Probes in accordance with the aircraft manufacturer’s instruc-
tions.
2.11 Install the EI P-300M Fuel Level Sender:
The CGR-30 system can interface with an aircraft’s existing Resistive Fuel Sensors via the RFLM-4 or
these resistive fuel level sensors can be replaced with the P-300M (Magnetic Float) Fuel Level Sender.
The signal produced by the P-300M Sender is a linear voltage output designed to work with the CGR-30
system.
The P-300M’s float arm and travel must match the aircraft’s existing sender’s arm and travel. Due to the
lack of information from aircraft manufacturers, the existing sender may need to be removed from the
aircraft and sent to Electronics International. In this way the P-300M’s float arm and travel can be
matched with the aircraft’s existing sender. Contact Electronics International for further information.
The P-300M has the same bolt pattern as resistive fuel senders. The P-300M requires three wires to
interface to the EDC (resistive senders only use one wire).
Note:
Note:
Note:
Note:
Note: Calibrating the CGR-30 to a fuel tank can compensate for nonlinearity in the tank’s shape and
nonlinearity in the resistive fuel level sensor. The CGR cannot correct for inconsistent or non-repeatable
signals from resistive fuel level senders. Unfortunately, many older resistive fuel level senders (and in
some cases, newer resistive senders) exhibit some of the following problems:
- Variation in the wiper-to-element resistance (CRV).
- Stick slip problems with bearings and wiper-to-element contact.
- Windup causing jumps in readings.
- Weak wiper tension.
- Loose or worn bearings, causing fluctuations in tension and resistance.
- Worn out wiper.
- Corroded wiper.
- Corroded or worn element.
- Build up of varnish on the wiper and element.
