International Hourmeter 52 mm
VDO Cockpit International electronic hourmeter.
12 Volt.
52 mm diameter.
The electronic operating hour counter is driven by a frequency-dependent stepping motor. The pulses needed for motor control are generated by a quartz-stabilized oscillator circuit, and processed by electronic circuitry. The oscillator is connected to quartz in a feed-back loop. The alternating voltage of the oscillator causes mechanical oscillation of the quartz, which generates a frequency to control the oscillation circuit. The oscillating frequency is necessary for the pulsing of the stepping motor.
The stepping motor rotation is transmitted to the number-wheel type counter and the operation indicator by a mechanical system.
The counter sums and displays the operating hours, the operation indicator displays the operation of the instrument in one-second steps. An indication wheel in the dial centre indicates that the operating hours counter is counting by turning in clockwise direction.
12 Volt.
52 mm diameter.
The electronic operating hour counter is driven by a frequency-dependent stepping motor. The pulses needed for motor control are generated by a quartz-stabilized oscillator circuit, and processed by electronic circuitry. The oscillator is connected to quartz in a feed-back loop. The alternating voltage of the oscillator causes mechanical oscillation of the quartz, which generates a frequency to control the oscillation circuit. The oscillating frequency is necessary for the pulsing of the stepping motor.
The stepping motor rotation is transmitted to the number-wheel type counter and the operation indicator by a mechanical system.
The counter sums and displays the operating hours, the operation indicator displays the operation of the instrument in one-second steps. An indication wheel in the dial centre indicates that the operating hours counter is counting by turning in clockwise direction.
