barfield 1811GA Series, User Instruction Manual

Page: 10 / 68

56-101-00184 / 00185 Rev. I TOC
September 24, 2014 Page x
TABLE OF CONTENTS (Continued)
Page
CHAPTER 3: OPERATION
1. THEORY OF OPERATION
A. Pressure
/ Vacuum Requirements ........................................................... 13
B. Control Valve Operation .......................................................................... 13
C. Power Supply Circuits .............................................................................. 14
2. 1811GA PNEUMATIC SCHEMATIC ......................................................... 14
3. 1811HA PNEUMATIC SCHEMATIC ......................................................... 15
4. PRELIMINARY
A. General ..................................................................................................... 16
B. Operation ................................................................................................. 16
C. Performing the Tests ............................................................................... 16
D. Internal Pressure Vacuum Source .......................................................... 16
5. PRETESTS
A. Pitot Pretest .............................................................................................. 17
B. Static Pretest ............................................................................................ 17
C. Applying Leak Correction......................................................................... 18
D. Instrument Calibration Correction ............................................................ 18
6. PITOT SYSTEM TEST
A. Pitot System Connection ......................................................................... 18
B. Pitot Leak Test ......................................................................................... 18
7. STATIC SYSTEM TEST
A. Static System Connection ....................................................................... 19
B. Static Leak Test for Non-Pressurized Aircraft ......................................... 20
C. Static Leak Test for Pressurized Aircraft ................................................. 20
D. Negative Altitude Tests ............................................................................ 21
E. Leak Test ................................................................................................. 21
F. Vertical Speed Indicator (VSI) Operation ................................................ 22
8. COMBINED PITOT / STATIC TEST
A. Combined Pitot / Static System Connection ............................................ 23
B. Below Field Elevation Test ...................................................................... 23
C. Above Field Elevation Tests .................................................................... 24
D. Returning the Pitot
/ Static Test Set to Ambient ....................................... 25
9. MACHMETER TEST ................................................................................. 26
10. ENGINE PRESSURE RATIO (EPR) TEST ............................................... 27
11. MANIFOLD PRESSURE GAUGE TEST ................................................... 28
12. LOW PRESSURE TESTS ......................................................................... 29
13. VACUUM TESTS ...................................................................................... 30