The Astrotech Model LC-2 chronometer uses a large scale integrated circuit (LSI) chip which contains several hundred transistors and controls all clock/timer functions. The LSI chip is attached to a single circuit board, a simplified construction technique resulting in high degree of reliability and performance at low cost. Circuitry is not subject to dirt, vibration, friction, or wear characteristics of mechanical clock movements.

Specifications: Clock: 12 or 24-hour, 4-digit clock, internally switchable before installation. Elapsed Timer: 24-hour capacity, displays minutes/seconds for the first hour; thereafter hrs./min. to 24-hrs. Date: Date is displayed in month/day format. Timing Accuracy: Typically better than a few seconds per month. Display: Continuous readout using a liquid crystal display for excellent visibility in direct sunlight. The display is lighted for night flying and connects to the aircraft instrument panel dimming circle. Both 12V & 24V bulbs are included with each panel mounted clock. Power: LC-2 comes in various part numbers, and the part number determines if the chronometer has an internal battery or is connected to the aircraft battery for power. Internal battery life is normally > 2-years The power drain when connected to the aircraft battery is negligible (< .003 AMP). Weight: Less than 4 oz. (113.4 g).
 

Specifications: Clock: 12-hr. local time (LT) & 24-hr. universal coordinated time (UTC). Elapsed Timer: 100-hr. capacity stopwatch (SW), stop & resort or reset to zero. Flight Timer: 100-hr. capacity started & stopped by external input. (i.e. landing gear). Down-Counter Presettable in hrs., min., & sec. for timing approaches or fuel management. May be wired for external alarm. Display: Continuous readout using a LCD for excellent visibility in direct sun. Power: The LC-6 comes in various part numbers and the part number determines power requirements. Panel mounted parts have an internal AAA battery for backup when aircraft power is removed. Weight: Less than 5 oz. (141.8 g). Installation: Installs directly into standard 2.25” (57.2 mm) clock panel cutout for the panel part numbers, or mounts in the specified aircraft control wheels. Environmental: LC-6 is qualified to all of the applicable sections of RTCA DO-160 for electrical & mechanical compliance.
 

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