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56-101-00930 Revision H

 

 

Page 13 

3.  Connect the 

standard leads to the Test Set’s TEST connector. 

4.  Press the Test Set PWR pushbutton. 

5.  Set the FUNCTION switch to RES MEAS. 

6.  Set the RANGE switch to 200 

Ω.  

7.  Short the test lead clips together to ensure a good electrical connection. 

8.  Press the PTS pushbutton while adjusting the SYS RES control knob for displayed system 

resistance to be simulated. 

9.  Release PTS pushbutton. 

10. Set FUNCTION switch to IND TEST. 

11. Press the mV, °F or °C pushbuttons to select units. Press the selected key again for mode 

(mV) or resolution (°F or °C). 

12. Connect test lead clips to indicator terminals. Observe polarity: Alumel is negative (-) and 

connects to the TT1200A BLACK clip. Chromel is positive (+) and connects to the TT1200A 
RED clip. 

13. Set the TEMP ADJ control knob for the desired test temperature as displayed on the 

TT1200A display indicator. It may be necessary to use the FINE control to achieve the exact 
settings. 

14. Compare the readings of indicator under test with the TT1200A readings. 

Note:

 Indicator must agree with TT1200A reading to within manufacturers'  

    specifications. 

15. Press the PWR pushbutton to power down the Test Set. 

16. Disconnect the Test Set from the aircraft wiring. 

17. Return the aircraft to its original configuration. 

 

E. 

Temperature Measurement Test Procedure 

1.  Access the aircraft system temperature indicator. 

2.  Disconnect thermocouple leads from indicator. 

3. 

Connect standard leads to Test Set’s TEST connector. 

4.  Press the Test Set PWR pushbutton. 

5.  Set the FUNCTION switch to TEMP MEAS. 

6. 

Set the RANGE switch to 20 KΩ - 0 Ω SYS RES.  

7.  Press the mV, °F or °C key to select units of measurements.  

CAUTION

: T

HE AIRCRAFT INDICATORS OF THE D’ARSON-TYPE MUST NOT BE  

                   

CONNECTED DURING THIS TEST. D’ARSONVAL INDICATORS MAY  

                   GENERALLY BE RECOGNIZED BY THE ABSENCE OF A MULTI PIN  
                   CONNECTOR AND USUALLY HAVE TWO TERMINAL POSTS OR TERMINAL  
                   SCREWS. 

8.  Connect test lead clips to indicator terminals. Observe polarity: Alumel is negative (-) and 

connects to the TT1200A BLACK clip. Chromel is positive (+) and connects to the TT1200A 
RED clip. 

Summary of Contents for TT1200A

Page 1: ...c All Rights Reserved USER INSTRUCTION MANUAL M N TT1200A P N 101 00930 M N OH58D P N 101 00930 OH58D Doc P N 56 101 00930 Revision H June 3 2022 ______________________________________ TT1200A OH58D Turbine Temperature Test Set ...

Page 2: ...formation contained herein is the sole property of Barfield Inc No intellectual property rights are granted by the delivery of this document or the disclosure of its content This entire document is proprietary information and shall not be reproduced or disclosed to a third party without the express written consent of Barfield Inc This document and its content shall not be used for any purpose othe...

Page 3: ... in this manual Inquiries should include specific questions and reference the publication title number chapter page figure paragraph and effective date Please send comments to TECHNICAL CUSTOMER SUPPORT GSTE BARFIELD INC P O BOX 025367 MIAMI FL 33102 5367 USA Telephone 305 894 5400 800 321 1039 Fax 305 894 5401 Email gsesales barfieldinc com ...

Page 4: ...pment will be serviced using proper procedures and certified instruments BARFIELD PRODUCT SUPPORT DIVISION Telephone 305 894 5400 800 321 1039 Fax 305 894 5401 Email gsesales barfieldinc com Shipping Address Barfield Inc 4101 NW 29th Street Miami Florida 33142 USA Mailing Address Barfield Inc P O Box 025367 Miami FL 33102 5367 USA Vector Aerospace Shipping Address Telephone 33 0 1 30 18 53 48 Fax ...

Page 5: ...t this also relates to M N OH58D D 260 00829 April 12 2011 Updated warranty information E 260 00914 May 21 2012 Updated recertification to include 101 00930 OH58D F 260 00914 September 25 2014 Updated Barfield logo warranty info G 260 01254 April 20 2020 Removal of CE label on Figure 1 Figure 2 updated Revision of General Description item 10 Document reformatted Minor grammar revisions H 260 01375...

Page 6: ...CERTIFICATION ix CHAPTER 1 GENERAL 1 1 INTENDED USE 1 2 DESCRIPTION 1 3 SPECIFICATIONS 3 4 CAPABILITIES 4 CHAPTER 2 OPERATION 5 1 OPERATING CONTROLS 5 2 GENERAL OPERATING INSTRUCTIONS 7 3 POWER UP INITIALIZATION 8 4 MENU DISPLAYS 9 CHAPTER 3 TEST PROCEDURES 11 1 MOVING COIL TYPE INDICATOR TEST PROCEDURES 11 2 POTENTIOMETRIC OR SERVO TYPE INDICATOR TEST PROCEDURE Without Lead Resistance 14 CHAPTER ...

Page 7: ...ranty x Figure 4 TT1200A Test Set 1 Figure 5 TT1200A Front Panel Switches 5 Figure 6 Power Up Message Display Sequence 9 Figure 7 Display Menu Flowchart 9 LIST OF TABLES PAGE Table 1 Physical Characteristics 3 Table 2 Temperature Measurement 3 Table 3 Lead Resistance Measurement 3 Table 4 Insulation Measurement 3 Table 5 Simulated System Resistance Measurement 3 ...

Page 8: ...d using the procedures and instructions detailed in this manual Do not use this equipment for any other purpose than that stated as the protection provided by the equipment may be impaired 2 INFORMATION PROVIDED WITH THE TEST SET In addition to this User Instruction Manual the Test Set is delivered with the items described below A The identification label located on the front bulkhead of the Test ...

Page 9: ...urned to Barfield Inc within ten 10 days of purchase to ensure automatic update of printed matter and validation of warranty To register your unit please visit https www barfieldinc com warranty_registration or scan the QR code on the supplied Warranty Registration Figure 2 Owner Warranty Registration Card D The TT1200A Limited One Year Warranty can be seen in Figure 3 3 RECERTIFICATION A The Test...

Page 10: ...56 101 00930 Revision H Page x Figure 3 Limited One Year Warranty ...

Page 11: ...hrough its entirety to become familiar with the TT1200A Test Set and use the placard instructions as a quick reference only Additionally it is advisable that the user reviews the specific aircraft system before performing any tests or checks refer to the Aircraft Maintenance Manual AMM A The TT1200A refer to Figure 4 provides the means for quickly troubleshooting aircraft temperature indicating sy...

Page 12: ...ent test point temperature correction 9 Carrying Case features a Fabricated from high impact plastic b Provides a pouch for test lead storage c The lid contains a placard of short operating instructions for the experienced technician 10 Auto Detection of Cable At power up the TT1200A looks to see if the Standard Cable leads are connected to the panel s TEST receptacle and displays the prompt TEST ...

Page 13: ...9 999 Ω in 0 001 Ω increments 0 199 99 Ω in 0 01 Ω increments 0 1 9999 kΩ in 0 0001 kΩ increments 0 19 999 kΩ in 0 001 kΩ increments Accuracy 0 05 of reading 2 counts Table 3 Lead Resistance Measurement D Insulation Range 0 199 9 kΩ in 0 1 kΩ increments 0 1 999 MΩ in 0 001 MΩ increments 0 19 99 MΩ in 0 01 MΩ increments 0 200 MΩ in 5 MΩ increments Accuracy 5 of reading 5 counts 200 kΩ 2 MΩ and 20 M...

Page 14: ...ystem wiring and other components C Simulates CH AL thermocouples with or without simulated system lead resistance D Measures and displays values of CH AL thermocouples in terms of millivolts millivolts with ambient compensation 1 F or 0 1 F and 1 C or 0 1 C E Automatically compensates for ambient temperature at test lead connection junction point or indicates this cold junction temperature ...

Page 15: ...utomatically five minutes after activation to conserve batteries unless the BKLT auto off feature is disabled by pressing the BKLT pushbutton for 2 or more seconds 3 The TEMP ADJ control knob allows coarse adjustment of the temperature When the FUNCTION is in the IND Test position the display shows millivolt readings 4 The FINE control provides exact adjustment of the temperature or millivolt read...

Page 16: ...F to scroll through display messages and option menus 13 The CONT pushbutton when held in and used with the soft keys mV or F allows the user to adjust the display contrast level from 0 to 100 The pushbutton is also a soft key ESC to cancel a function and return the unit to normal operation Note Units identified with Mod D use a different P N LCD Display to replace the original P N now obsolete an...

Page 17: ...inals facing outward Reattach the covers to each tube 2 At power up the display shows the message Battery to indicate the remaining available battery life 3 The user may check battery condition at any time by pressing the MENU pushbutton 4 When the available battery power goes below 15 the Test Set displays the Battery Low message approximately every minute When the available battery power goes be...

Page 18: ...er 2 Set the FUNCTION switch to RES MEAS 3 Set the RANGE switch to 200 Ω 4 While pressing in the PTS pushbutton in rotate the SYS RES knob to set the required system resistance for the specific aircraft under test refer to the specific AMM Note While the PTS button is held in the TT1200A shows the message PTS on the right of the display 5 Release the PTS button Note The TT1200A replaces the messag...

Page 19: ...pressed the user may use the mV or the F soft keys to scroll through the message display and option menus as shown refer to Figure 7 Figure 7 Display Menu Flowchart 1 Battery The display shows the available battery power percentage available 2 Ver X The display shows the current software version installed in the unit ...

Page 20: ...d for the unit to automatically turn off when not in use To activate the feature at the Auto display press ENT C Use the mV or F keys to set 5 minute increments up to 60 minutes Press ENT to accept entry Press ESC to exit from Menu options 5 Maintenance This menu option is password protected and allows other maintenance functions such as setting the calibration due date ...

Page 21: ...e the RED and BLACK test clip connections and verify the display repeats the same reading when the PTM pushbutton is pressed If reading does not repeat the engine thermocouples may be hot Refer to Hot Engine Testing Chapter 3 section 1 D Note Resistance must be within the manufacturer s specifications If results are slightly outside limits repeat entire procedure to ensure test failure is not due ...

Page 22: ...the aircraft system indicator refer to the engine manufacturer s Maintenance Manual for the specific test method 3 Connect the standard leads to the Test Set s TEST connector 4 Press the Test Set PWR pushbutton 5 Set the FUNCTION switch to INS MEAS 6 Set the RANGE switch to 2 MΩ Note The mV F and C pushbuttons are inactive The settings for the SYS RES TEMP ADJ and FINE control knobs have no effect...

Page 23: ...xact settings 14 Compare the readings of indicator under test with the TT1200A readings Note Indicator must agree with TT1200A reading to within manufacturers specifications 15 Press the PWR pushbutton to power down the Test Set 16 Disconnect the Test Set from the aircraft wiring 17 Return the aircraft to its original configuration E Temperature Measurement Test Procedure 1 Access the aircraft sys...

Page 24: ... electrical connector at the rear of indicator 3 Connect the TT1200A leads to probe pins sized to fit the Chromel and Alumel pin sockets of the aircraft plug removed from indicator 4 Follow the System Lead Resistance Test Procedure Chapter 4 subsection 1 A steps 3 11 and 13 15 Note Lead resistance is not critical and can be from 5 to 100 Ω refer to the Maintenance Manual for specific values C Ther...

Page 25: ...hin manufacturers specifications 13 Press PWR pushbutton to power down Test Set 14 Disconnect Test Set from aircraft wiring 15 Return the aircraft to its original configuration F Temperature Measurement 1 Disconnect the aircraft power to indicator refer to the AMM 2 Disconnect the electrical connector at the rear of indicator 3 Connect standard leads to Test Set s TEST connector 4 Press the Test S...

Page 26: ...cking materials be retained should it become necessary for any reason to reship the Test Set It is also recommended that the Test Set be carefully inspected for damage If damaged immediately notify both the carrier and manufacturer 2 SHIPPING A Use standard delicate electronic equipment packaging procedures when packing the Test Set for reshipment 3 STORAGE A Store in a cool dry place ...

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