Digital Counter Drum Encoding Altimeter
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The MD23-215 Digital Counter Drum Encoding Altimeter features an operating range of up to 55,000 feet. It offers user-selectable vertical speed indication and user-selectable 6 second vertical trend. The digital altimeter is TSO certified and SSEC and Night Vision Imaging System (NVIS) compatible versions are available.
User-Selectable Features
- Vertical speed indicator (ON/OFF)
- 6-second vertical trend (ON/OFF)
- Altitude target (ON/OFF)
- Approach minimums alert (ON/OFF)
- Barometric setting (millibars, hectopascals or inches of mercury)
- Operating range up to 55,000 feet
- Configurable altitude units (feet or meters)
- Baro setting synchronized via ARINC 429
- Encoding outputs via ARINC 429 and Gray Code
- Combine with Digital Attitude Indicator and Digital Airspeed Indicator for a complete standby package
- Fits standard 2-inch panel cutout
- Rechargeable, field-replaceable emergency battery (available)
- Lightweight — 0.4 lbs
- Simple user interface — Single, push-and-turn control knob
- Daylight readable LCD and smooth, high-resolution graphics
- Manual external lighting control or built-in photocell for automatic dimming
- SSEC curve customized to match primary flight displays (available)
- Night Vision Imaging System (NVIS) compatible (available)
- TSO certified (Design Assurance Level A)
- Designed and built in Wichita, Kansas, USA
- Two-year limited warranty
Power Input
10–32 VDC
0.14A @ 28 VDC; 4 watts nominal
Data Input
ARINC 429: Low or high speed; Labels 234, 235
Pressure: Absolute/Static (Quick Disconnect)
Data Output
ARINC 429: Low or high speed; Labels 203, 204, 212, 217, 234, 235
Gray Code
Operating Range
-1,500 to +55,000 feet
Units of Measure
Altitude: Feet or meters
Barometric Setting: Millibars (mb), hectopascals (hPa) or inches of mercury (in.Hg)
Lighting
5, 14, or 28 VDC external control or internal photocell for automatic dimming
Battery
Rechargeable, field-replaceable emergency battery supply (available)
P/N 6430006-(1)
Technology: Nickel-Metal Hydride (NiMH)
Attributes: 0.25A @ 24 VDC nominal (6 Wh capacity)
Runtime: 60 minutes @ 0.25A
Weight
0.4 lbs (0.17 kg)
Mounting
Rear panel mounted, (4) #6–32 screws, 2.25-inch round bezel
Dimensions
2.43″W x 2.43″H x 1.0″D (61.7mm x 61.7mm x 25.4mm)
Mating Connector
P/N 9019162-1: 26-pin, D-Sub electrical connector (Quick Disconnect)
P/N 9019162-2: Pneumatic fitting (Quick Disconnect)
Certification
FAA TSO certified to C10c, C106, C113b
RTCA DO-160G qualified
RTCA DO-178C qualified, Design Assurance Level (DAL) A
Rights
U.S. Patent 11,048,389