How to set the limits of the DPS1000 and 1811NG?

How to set the limits of the DPS1000 and 1811NG?

Using incorrect limits can cause damage to sensitive components and aircraft systems. 

For that reason, it is very important to ALWAYS verify and ensure the limits selected are appropriate for the aircraft and/or the instruments that are going to be tested. 

The DPS1000/1811NG Test Sets come with two (2) pre-defined sets of operating limits – the default limits profile and the max limits profile. These limits are available for each of the of the three (3) operating modes – AeronauticalPressure units and EPR. 

Both DPS1000 and 1811NG Test Sets include a setting that allows creating and saving custom limits. With this feature, the customer can easily access and use the custom limits again in the future.

The values for both limits profiles are stored in an R/O“read only”, file. The Test Set will first power up and initialize with the default limits profile. As a result, if the customer changes the limits to the max or custom limits profile, the Test Set will power up using the last profile selected.  

The Test Set limits must be configured with the appropriate values to protect the aircraft system or instrument(s) about to be tested. 

“…it is very important to ALWAYS verify and ensure the limits selected are appropriate for the aircraft and/or the instruments that are going to be tested.

How to set up the limits 

 

NOTE: Before creating new limits refer to the appropriate AMM (Aircraft Maintenance Manual) or CMM (Component Maintenance Manual) for the actual minimum and maximum values to be applied. 

 A. If the limits don’t exist:  

Go to Setup 2 and create the limit file following these steps: 

  1. From Main Menu display, press Page 2” button 
  2. Screen is displayed with four options (Setup 1, Setup 2, Setup 3 and Change User Pin#). Select Setup 2.  
  3. From keypad screen, input user PIN (manufacturing default PIN: 123456– unless already changed by the user).  
  4. Select Limits Create/Edit/Delete.  
  5. Select Create Custom Limits – enter the parameter values for ALT, ROC, CAS, RtCAS, MACH, and ALR (Auto Leak Recovery). Note: You can select each parameter by touching the parameter or cycle through each parameter using the “Enter” key.  

Note: It’s recommended to Save the Limits with the aircraft name. 

The limits profile currently in use is displayed on the right upper quadrant of the screen (Figure 1). 

DPS1000 Front Screen Image

B. Selecting limits: 

If the operating limits exist because they were already created gto Setup 1 and select the limit file following these steps: 

  1. From Main Menu, press “Page 2” button 
  2. Screen is displayed with four options (Setup 1, Setup 2, Setup 3 and Change User Pin#)Select Setup 1. 
  3. Touch Limits View/Select key. 
  4. Touch “Select Limits” 
  5. Select applicable limit from the list displayed. 
  6. Click OK. 

NOTE: The tables showing the default and max limits profile values included in the DPS1000/1811NG Test Sets can be found in the corresponding user instruction manuals under “Appendix B: Operating Limits. 

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How to interface a TT1000A and TT1200A with an Aircraft?

How to interface a TT1000A and TT1200A with an Aircraft?

This is a brief description of some of the concerns regarding the proper point for interfacing the Barfield TT1000A and TT1200A test sets into the aircraft Turbine Temperature Indicating System. 

Where to break into the aircraft engine temperature indicating system to perform Indicator tests?   

Break at the engine terminal block

If the aircraft indicator is a servo, digital, or glass, it is recommended breaking into the system at the engine terminal block.

Test at the indicator

Note that if the indicator does not use aircraft power and has only 2 posts for the electrical connections then it is NOT recommended to break into the terminal block.

This type of system is powered solely by the millivoltage from the thermocouples and must be tested at the indicator.

The indicator is calibrated to measure K type thermocouple millivoltage with a specific in-line resistance, typically 8.00 ohms.

If the Test Set is configured to simulate the 8.00 ohms and interfaced at the terminal block, then the indicator will see the simulated 8 ohms plus the combined resistance of the Chromel and Alumel wire lengths between the terminal block and the indicator.

The result will be that the indicator will read lower than the Test Set display.

TT1000 Schematic Barfield

Where to find the manuals?

To learn more about the proper usage and interfacing of the test sets, please refer to the appropriate Instruction Manuals, availble on our website barfieldinc.com:  56-101-00901  or 56-101-00930  

TT1000 Temperature Tester - Barfield
TT100A
How the Frequency Domain Reflectometer  with Boeing App Works?

How the Frequency Domain Reflectometer with Boeing App Works?

 Barfield Inc., in partnership with Bird, has developed the FlightHawk ( formerly known as SiteHawk-AV), a Frequency Domain Reflectometer (FDR), designed for aviation. It is aim at reducing aircraft downtime when troubleshooting any RF cable and antenna in an aircraft. The new Boeing App creates a layer of support simplifying testing of any navigation unit.

The FLightHawk connects from the end of the coaxial cable, testing if damages exist by identify the Distance to Fault (DTF) and capable of performing a frequency sweep to the antenna.

The latest App, allows for any technician to quickly diagnose problems with the navigation system by splitting the problem with certainty between the LRU and the connection to the antenna.

This video shows how the Automatic App made for Boeing works. Currently it is available with Boeing 737,767 and 787 coax and antenna configurations. 

The Automatic App allows to:  

  • Select an aircraft model.
  • Select the RF system.
  • It will automatically calibrate, select the cable type and the distance to the antenna for that specific system in that specific aircraft.
  • It will give you  a PASS or FAIL
  • If FAIL it will take you to the Manual mode to do the VSWR ( Voltage Standing Wave Ratio ) and DTF (Distance to Fault) analysis.

The simplicity of the App allows for any technician with some experience in avionics to run a test of any navigation unit. Qualifying the event facilitates the job for technical support, as many times expert avionics technician are not available right onsite. 

After running the test, the unit is capable of sending the information to an avionics manager, located remotely and transfer a picture of the signal via Bluetooth to a phone.  More Boeing configurations will follow.

How to Connect the DPS1000 and 1811NG to a Tablet?

How to Connect the DPS1000 and 1811NG to a Tablet?

The DPS1000 and 1811NG Test Sets can be controlled using a Wi-Fi enabled Android or iOS tablet or cellphone (not supplied) as a wireless remote-control device.  

Download the free Barfield app from the Google Play Store or Apple App Store – search for “Barfield ADTS”. 

    Establishing Wi-Fi Connection with a DPS1000 or a 1811NG Test Set

    With an Android device

    1. Launch the “Barfield ADTS” app.
    2. Press “Connect” (Figure 1).

    Barfield ADT Remote Terminal -1

    Figure 1

    3. If you are not connected to a DPS1000/1811NG Test Set Wi-Fi, the “INFORMATION” screen will appear (Figure 2).

    Barfield ADTS Remote Terminal Information -2

    Figure 2

    4. Press “Device Settings” and you will be redirected to your Android device’s Wi-Fi connection “Settings” screen.

    5. Connect to available DPS1000/1811NG Wi-Fi.

    NOTE: The first time the device connects to a DPS1000/1811NG Test Set, a password request will trigger (Figure 3).

    Password: barfield (all lowercase)

    Barfield ADTS Remote Terminal Information Password -3

    Figure 3

    6. Return to “Barfield ADTS”. The selected DPS1000/1811NG Wi-Fi will be displayed (Figure 4).

    Barfield ADT Remote Terminal Password -4

    Figure 4

    7. Press the “Connect” button.

    8. You are now ready to use the “Barfield ADTS” app with your Test Set.

    With an Apple device

    1. Launch the “Barfield ADTS” app.
    2. Press “Connect” (Figure 1).
    Barfield ADT Remote Terminal Password -5

    Figure 1

    3. If you are not connected to a DPS1000/1811NG Test Set Wi-Fi, the “Information” screen will appear (Figure 2).

    Barfield ADT Remote Terminal Password -6

    Figure 2

    4. Go to your device’s Wi-Fi connection “Settings” screen.

    5. Connect to available DPS1000/1811NG Wi-Fi (Figure 3).

    NOTE: The first time the device connects to a DPS1000/1811NG Test Set, a password request will trigger (Figure 4)

    Password: barfield (all lowercase)

    Barfield ADT Remote Terminal Password -7

    Figure 3

    Barfield ADT Remote Terminal Password -8

    Figure 4

    6. Return to “Barfield ADTS”. The DPS1000/1811NG Wi-Fi selected will be displayed (Figure 5).

    Barfield ADT Remote Terminal Password -9

    Figure 5

    7. Press the “Connect” button.

    8. You are now ready to use the “Barfield ADTS” App with your Test set.

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    How Electrostatic Spraying Works?

    How Electrostatic Spraying Works?

    Electrostatic spraying is a technology widely used in the agricultural industry to spray vegetables and fruits killing bacteria and preventing viruses. Similar technology is being used in the health industry to disinfect hospitals.

    The current pandemic has put us into a position to search for solutions used in other industries and find its way into aviation.

    The principle of electrostatic spraying is to charge positive particles of disinfectant or antivirals to uniformly cover areas at a fast pace. 

    Images from our partner On Target Spray Systems and Barfield

    The unit uses an air pump that combined with an electrostatic charge, charges droplets positively that gets attracted to negative surfaces, wrapping around objects.

    Electrostatic Sprayer On Target Barfield Before
    Electrostatic Sprayer On Target Barfield Unit on
    Electrostatic Sprayer On Target Barfield Unit on

    Compressor ON

    Electrostatic OFF:

    Tip Dry

    Electrostatic ON:

    Tip Wet

    Aviation operations, including Airports MROs, FBOs could speed up the disinfection process and the application of new antivirals with lasting efficacy. 

    The video explains how electrostatic spraying works

     

    This is a picture of the equipment used to do demonstration

    Electrostatic Sprayer On Target Barfield image

    Do you want to learn more about it?

    Click here to check the videos and technical specifications

    How Airlines Are Testing Aircraft to Bring Them Back to Service

    How Airlines Are Testing Aircraft to Bring Them Back to Service

    A few months ago  we had shared a document of How Airlines Were Speeding Up Aircraft Turnaround Time. We are bringing back this topic back  as airlines are using the Frequency Domain Reflectometer called the FlightHawk to test antennas and coax cables to bring aircraft back to service. 

    We published this document highlighting 3 easy steps:

    3 Easy Steps - Barfield

    1. Select Mode Automatic or Manual

    Frequency Domain Reflectometer - Boeing App Step1 - Barfield

    2. Pick Aircraft Type and Navigation System

    Frequency Domain Reflectometer - Boeing App Step2 - Barfield

    3. Test: Pass or Fail

    Frequency Domain Reflectometer - Boeing App Step3 - Barfield