Electronic Relay Transfer

Electronic equipment has been developed to gauge up to 16 relay contacts simultaneously as the relay operates or releases in pulsing. The system provides a visual presentation on an oscilloscope of the gauge points where the relay armature opens or closes the contact. The position of the armature is shown by the horizontal position of the scope beam. Each particular contact is represented on the scope by one of 16 horizontal lines generated by the motion of the armature. A vertical step on a line indicates the gauge point at which the contact operates. The device consists of three main parts: (1) An electrostatic gauge to indicate the position of the relay armature, (2) An electronic scanner that continually switches across all the contact pairs, and (3) A brightness control circuit to intensify the beam of the scope when the armature is moving. Fig. 1 shows a schematic diagram of this equipment. As shown on Fig. 2 the scope, test relay jack and electrostatic gauge are mounted on a bench. The scanner, power supplies and control circuits are mounted underneath the bench. ELECTROSTATIC GAUGE