MC-1 Sperry Calibrator

Features:

• Black (color code 0) - sensor 1 output
• Brown (color code 1) - sensor 2 output
• Red (color code 2) - sensor 3 output
• Orange (color code 3) - drive coil
• Yellow (color code 4) - drive coil
• Green (color code 5) - common for output coils

Switch S1 connects directly to the J3 (Red) and J4 (Black) Test Jacks:

• Position "E1" has J3 to two yellow wires and J4 to two orange wires
• Position "E2" has J3 to two green wires and J4 to a single brown wire
• Position "E1/E2" has J3 to the same two green wires as "E2" and J4 to a single yellow wire.

Many aircraft (and other vehicles) have a heading system that is a combination of a number of different sensors all working toghther to tell, at any instant, the heading. One of these is the magnetic heading sensor.  Typically an electronic type like a flux gate magnatometer. In order to verify that the magnetic sensor on an aircraft is correct you need a calibration standard for magnetic filed.