70 Installation Manual - Kt
Use low-loss RG-400 or better for runs under 10 feet. 6. Post-Installation Testing
Cross-check the encoder output against the primary altimeter.
[Visual Inspection] ──> [Power-On Checks] ──> [91.413 Certification] (Check wiring/security) (Check smoke/dimming) (Ramp test via calibrated set)
Use the connector pinout diagram provided in the installation manual to ensure each wire is in the correct position. Kt 70 Installation Manual
(Note: Sections 1–3 are often relocated to the separate Installation Manual).
The ARINC 429 lines (Pins S and T) must be a twisted, shielded pair. Terminate the shield braid directly to the aircraft chassis ground at the backplate entry point, keeping the unshielded leads shorter than 3 inches. 3. RF Antenna System Installation
The KT 70 uses a standard BendixKing aluminum mounting tray. Use low-loss RG-400 or better for runs under 10 feet
The manual shows how to connect wires but rarely where to route them. For instance, it warns against running input wires near power cables but doesn’t show a suggested layout. A single photo or isometric drawing would help.
Ground the chassis directly to the aircraft main airframe ground.
Use standard aviation-grade hardware, such as 6-32 screws. 3. Electrical Wiring and Pinouts [Visual Inspection] ──> [Power-On Checks] ──> [91
Once installed, the KT 70 requires configuration before it can be used. Configuration
| Parameter | Description | Typical Setting | |-----------|-------------|------------------| | | Sensor type | K (for K-thermocouple), Pt100 | | Unit | Temperature unit | °C or °F | | OPL | Output power limit | 100% (unless limiting heater) | | AL1 | Alarm 1 setpoint | e.g., 50°C above SP | | HY1 | Alarm hysteresis | 2°C |
Mount the antenna on the bottom of the fuselage. Keep it at least 3 feet away from ADF loops, DME antennas, and the VHF COM antennas to minimize signal shadowing and interference. 5. Post-Installation Configuration and Checkout
Proper mechanical placement within the aircraft panel prevents electrical interference and mechanical strain. Panel Mounting