Products


M655 Features

  • 2 1/4" STANDARD MOUNT OR FRONT MOUNT
  • OUTSIDE AIR TEMPERATURE (°F)
  • OUTSIDE AIR TEMPERATURE (°C)
  • PRESSURE ALTITUDE
  • DENSITY ALTITUDE
  • AIRCRAFT VOLTAGE
  • VOLTAGE ALARM  (NOT ON NVG UNIT)
  • DEVIATION ALARM (NOT ON NVG UNIT)
  • SUNLIGHT READABLE DISPLAY
  • FAA-PMA APPROVED


# # #
Part Number Part Description
M655-1 View Prices MODEL 655-1 O.A.T. C & F/ PRESSURE & DENSITY ALT/ DC VOLTAGE/ (FRONT MOUNT) (TEMP. PROBE INCLUDED) VOLTAGE & DEVIATION ALARM
M655-2 View Prices MODEL 655-2 O.A.T. C & F/ PRESSURE & DENSITY ALT/ DC VOLTAGE (REAR MOUNT) (TEMP. PROBE INCLUDED) VOLTAGE & DEVIATION ALARM
M655-2-NVG View Prices MODEL 655-2-NVG O.A.T. C & F/ PRESSURE & DENSITY ALT/ DC VOLTAGE (REAR MOUNT) (TEMP. PROBE INCLUDED) NVG GREEN A
655-PROBE View Prices PROBE-7FT-RB TEMP PROBE 7FT RED/BLK TWISTED (ANALOG) 301,303,307& 655 , NOTE: UNITS WITH "D" IN THE SERIAL # USE A DIGITAL PROBE
C307PS View Prices PROBE-12FT-WHT-C307PS TEMPERATURE PROBE 12FT COAX (ANALOG) 301,303,307,655 & 803
C307PSM View Prices PROBE-12FT-WHT-C307PSM TEMPERATURE PROBE 12FT COAX (ANALOG AD590MH, ENHANCE PRECISION TEMPERATURE) 301,303,307,655 & 803
D307PS View Prices PROBE-12FT-WHT-D TEMP PROBE 12FT WHITE DIGITAL (FOR UNITS WITH "D" IN THE SERIAL #; MODELS 301, 303, 307 & 655)
PROBE-NICKEL-655-NUT View Prices NUT FOR TEMP. PROBE (REQUEST ADDITIONAL O RING AND WASHER IF NEEDED)
  • Density Altitude: -10,000 to 30,000 ft.
  • Pressure Altitude: -1,000 to 62,700 ft.
  • Temperature Range: -55°C to +100°C, -67°F to +212°F
  • Accuracy:  +/- 1% of full scale
  • Voltage Range: 10 to 32 Volts
  • Input Voltage: 14  to 28 Volts
  • Input Current: .35 Amps max.
  • Weight: 5 ounces
  • Warranty: 1 year



INSTALLATION ELIGIBILITY

  • Beech Models 35, A35, B35, C35, D35, E35, F35, G35, H35, J35, K35, M35, N35, 35-33, and 35-A33

 


Davtron Inc. recommends that you purchase our products through your local avionics shop and have them do your installation. They know how to handle all the log book entries you need for FAA approval. If your airframe is not listed on our PMA approval list above for the unit you're installing, you need to complete a FAA 337 form and file with your local FSDO. FAA PMA # PQ1062NM. (View a sample 337 form)





Frequently Asked Questions

 

Q: The "P" is flashing on my unit, what is wrong?

A: The unit is not seeing code or an incorrect code. Measure data lines. Is there a transponder present? If there is no transponder present, you need to provide pull up resistors to all the data lines. Bring all data lines up to 5 volts through a 27k to 100k resistor.

 

Q: Do I have to wire up pin 12, D4?

A: Only wire this pin if your aircraft goes over 33,000 ft.

 

Q: My unit locks up on startup and I can't change modes. If I cycle master switch, unit will again work fine. What is wrong?

A: Some older 655 units have a micro-processor that will lock up if unit drops to 11 volts. You can either send unit in for modification, or put the 655 on avionics master and turn on after engine start.