+44 (0)117 907 4761
Providing innovative and effective solutions for over 25 years
In Detail

DATAIR-400/M3+ Handheld ARINC 429 Tester

The DATAIR-400/M3+ ARINC 429 Tester is a Hand Held unit that comprises an 8 line by 21 character backlit LCD, an alphanumeric keypad, a microprocessor controlled ARINC 429 receiver, transmitter board with a detachable rechargeable battery pack.

The DATAIR-400/M3+ is aimed at providing the user with an easy to use first line diagnostic tool for testing and troubleshooting ARINC 429 avionics systems. It allows the user to connect to an ARINC 429 data bus and easily view the active ARINC 429 Labels on the bus or to generate up to 150 ARINC 429 test words to simulate a specific test. The receiver will automatically adapt to and display the bus bit rate.

The DATAIR-400/M3+ instrument and accessories are supplied in a flite case, Part Number: DATAIR-400/M3+/FC.

The DATAIR-400/M3+ contains the same basic features found in DATAIR-400/M3(V2) with the data entry in engineering units format for transmitted ARINC 429 data. Data values for up to 150 labels can be entered and the values and configuration can be saved in one of ten user profiles for easy and fast recall for different projects.

Standard labels held in non-volatile ROM can be recalled, modified and saved as custom labels if required. These special labels can override the standard definitions if required. These custom labels can be suspended or deleted altogether if they are no longer required. The customised labels can be separated by the standard hexadecimal equipment identifier as there can be multiple different definitions for the same ARINC 429 label covering the various standard ARINC 429 architectures.

We provide a software utilty for users that would prefer to define their custom engineering unit Labels on a PC.
Further information can be found HERE.

The DATAIR-400/M3+ is an enhanced version of the DATAIR-400/M3(V2) and it includes all features of the DATAIR-400/M3(V2). Please refer to the  DATAIR-400/M3(V2) for a description of the basic functions if you are not familiar with this product. The DATAIR-400/M3+ has the following enhancements:

  • ARINC 429 data capture with time stamp (up to 11.9 hours duration with 100uS resolution),
  • Large 522,144 ARINC 429 Label capture to non-volatile storage,
  • Filtered ARINC 429 Labels to capture including the option to specify Conditional ('<=', '>=') data value, SSM, Parity error, etc., 
  • Start and Stop Triggers for starting and stopping a data capture, 
  • Relay contact to signal a Start or Stop of triggered data capture,
  • Pre-trigger and post trigger buffers so that events prior to the trigger condition can be viewed,
  • Extensive post data capture search and filtering tools on the DATAIR-400/M3+ to locate the events of interest.
  • Filter a sub-set of captured ARINC 429 Labels to display,
  • Search for specific ARINC 429 Label only,
  • Scroll forwards and backwards through captured data,
  • Jump to First record, Trigger record or Last record,
  • View All data or only data where values have changed (eliminates static values from display),
  • A 0 to 10V output that can be assigned to any Label that has an associated engineering units definition (ie. Altitude, Airspeed, etc), 
  • Discrete relay output that can be assigned to a discrete bit within a user selectable ARINC 429 Label,
  • Built-in USB interface so that an external USB / RS232 adpater cable is not required,
  • 5 to 30 volt DC external power input for operating the DATAIR-400/M3+ from an aircraft supply.
  • Low battery indication provides 30 minute warning of exhausted battery.
  • Metric / Imperial engineering units
  • Parity: ODD / EVEN / NONE
  • Low Battery indication on screen.

DATAIR-400/M3+ Handheld ARINC 429 Tester Detail

Data Capture:
The DATAIR-400/M3+ can be used to capture real time data from an ARINC 429 data bus.
There are two modes of data capture: (1) Manual capture and (2) Triggered capture.

  1. The Manual data capture can be started and stopped by the user.
  2. The Triggered data capture will start a capture and / or stop a capture dependent upon the various trigger conditions configured by the user.


Data captures can be set up to capture all the active ARINC 429 Labels or just a specific subset of Labels of interest to the user.

A triggered data capture can be setup to start and / or stop when a particular trigger condition occurs. Trigger conditions can be set for a selected ARINC 429 Label, the data values ('<=', '>=') for starting and / or stopping the capture, the SSM value and a Parity condition. Each of the trigger conditions contains a "Don't care" condition so that any of the possible triggers conditions can be ignored.

A relay output can be assigned such that it will activate when a Start or Stop trigger condition has occured.

The DATAIR-400/M3+ contains extensive post capture filtering and analysis tools for selecting the data of interest and displaying it to the user. Searches for ARINC 429 Labels, data values, SSM conditions, Parity errors, etc., are all within the capability of this capable instrument.

0 to 10 volt Output:
The internal D/A Converter can be assigned to any ARINC 429 Label that has been defined with an engineering unit definition. For example "Ground Speed" from Label 312 could be assigned so that the zero to full scale value is output as a 0 to 10 volt output.
For parameters that have a +/- content, it is possible to have a 0V-5V-10V output representing -FS, Zero and +FS. 

Discrete relay output:
The internal volt free relay on the DATAIR-400/M3+ can be assigned to an individual bit within any selected ARINC 429 Label. The operation of the relay contact can be inverted from the true state of the selected bit if required.

DATAIR-400/M3+ Handheld ARINC 429 Tester Specifications

The DATAIR-400/M3+ has the following features:

Receiver features:

  • Label search of active ARINC 429 labels displayed by Label number and name or 32-bit hexadecimal
  • Bus monitor displaying Bus Speed (“H” (100k/bps), "M" (50k/bps) or “L” (12.5k/bps), SSM, SDI, bits 29 ~ 11 in binary and hexadecimal, Parity and Label rate in mS.
  • Bus monitor displaying selected label in engineering units (BCD and BNR).
  • Automatic reception of Lo, Med or Hi ARINC 429 bit rates
  • Standard ARINC 429-16 Label definitions for Rx included -  selection by Equipment ID code.
  • User definable and custom ARINC 429 label definitions – with save, suspend or delete.
  • Automatic preservation of setup between power downs
  • Opto-coupled isolated inputs


Data capture and analysis:
  • Up to 11.9 hours of data capture depending upon bus density and numbers of labels filtered with 100uS time stamp resolution
  • Large 522,144 ARINC 429 Label capture to non-volatile storage,
  • Start and Stop data capture triggers,
  • Internal relay for signalling external equipment of a trigger condition,
  • Extensive post data capture analysis on the DATAIR-400/M3+ to locate events of interest,
  • Search for specific parameters, by value, SSM, Parity, etc.,
  • View all captured data or just those parameters that have changed on a label by label basis.
  • A 0-10V DC output that can be assigned to any Label that has an associated engineering units definition,
  • Discrete relay output that can be assigned to a discrete bit within a user selectable ARINC 429 Label


Transmitter features:
  • Standard ARINC 429-16 Label definitions for Tx included -  selection by Equipment ID code.
  • User definable and custom ARINC 429 label definitions – with save, suspend or delete.
  • Up to 10 Transmitter profiles for saving various configurations for use in the Lab / Workshop.
  • Data entry in binary, hexadecimal or engineering Units (BCD and BNR)
  • On/Off toggling of individual data bits 11 through 29
  • Editable SSM field values.
  • Editable Parity.
  • Editable Inter-Word Gap (IWG) from 2-bits to 255-bits (applies to all labels)
  • Real time update of transmitted data
  • Transmission of up to 150 labels at user selectable repetition rates.
  • Individual label transmission interval (10,20,50,100,200,500 and 1000 mS) word rates
  • Single shot mode
  • Selectable (Lo (12.5k/bps), Mid (50k/bps) or Hi (100k/bps) speed bit rate
  • Non-volatile memory storage


Other features:
  • An 8-line by 21-character backlit display with 1 minute timeout.
  • Rechargeable detachable battery, 6-8 hour life on single charge
  • Can be powered from an external 5 to 30V DC power supply.
  • Standard D15 plug connector with supplied test leads for connecting to ARINC 429 busses and a USB port.
  • Alphanumeric keypad for data entry
  • Custom Label definitions
  • Imperial or Metric scaling switch for engineering units.
  • The software on the unit can be upgraded via USB using supplied cable.
  • Flite case  available with pre-cut foam to hold the instrument and accessories
  • Full EMC Compliance to European (CE) directive.
  • Weight: 750g (with batteries fitted).
  • External supply: 5 to 30 volts DC @ 270mA (at 5V).
  • External DC Connector: L712AS Jack from Switchcraft. Note: The Tip of the Plug is +Ve.
  • Environmental: 0 to 50 ºC (operating).
  • Low battery indication on screen giving 30-45 minutes warning.
  • Many more features to come...
Input: Opto-coupler isolated input
Voltage levels (Line A to B)  
HI +6 to 12V
NULL +2.5 to -2.5V
LO -6 to -12V
Bit rates:-  
Low Speed 8 to 18 kbps
Mid Speed 40 to 60 kbps
High Speed 80 to 125 kbps
Output: Industry standard line driver
Output impedance: 75 ±5 Ω (Line A to B)
Voltage levels (Line A to B)  
HI +10 to ±1V
NULL 0 to ±0.5V
LO -10 to ±1V
Bit rates:-  
Low Speed 12.5 kbps
Mid Speed 50 kbps
High Speed 100 kbps
Word rate 10 to 1000mS
Weight 0.55kg
Dimensions 22.9H x 9.7W x 5.4D CM
Power requirements:  
Input 5 to 30V DC @ 270mA - 60mA external OR 4.8V @ 2200mAH NiMH battery
Operating temperature 0 to 50 °C (Indoor use only)
Relative Humidity 0% to 85%

All units are designed to meet the European and US EMC regulations.

DATAIR-400/M3+ Handheld ARINC 429 Tester Downloads

 download    Click here to download DATAIR-400/M3+ - V2.05 ~ V2.09 User Manual
Updated 29th January 2018 
To request password click here
download Download the Brochure for the DATAIR-400/M3+
Updated 22 August 2018
download DATAIR-400/M3 V2.09E Firmware Update 
Serial Comms update for BCD type definition.
Improved BCD data entry.
Optimised low battery level.
Updated 20 February 2019

DATAIR 400M3+ Sky