SELF-TEST PROCEDURE

TM-1-6625-724-13P Aviation Vibration Analyzer Manual
Page Navigation
32

TM 1-6625-724-13&P 0006 00 0006 00-9 (a) Test the graphics compatibility by pressing the PRINT key to print the Main Menu screen (The first screen that appears when normal AVA operation has started). (b) Test the text mode by pressing the PRINT key in any help, error, or menu selection screen. The following is an example: (1) Press the PRINT key to print out the text displayed on the screen at this time. (2) If the printer fails to print the proper screen, flush the print spooler using the following sequence: (a) Select the Manager menu by pressing F4 at the main menu. (b) Select setup option by using the UP/DOWN arrow keys and highlighting the Setup option and pressing the DO key. (c) Select the Printer option and press the DO key. (d) Select the Disable option and press the DO key. (e) Select the Flush Queue option and press the DO key. (f) Select the Enable option and press the DO key. (c) If the screen does not print any characters or prints incorrectly, make corrections to the printer switch settings as necessary. (1) If the printer prints random characters, verify that the correct print driver was selected, most likely the incorrect one was selected. (2) If the printer prints on one line only and repeatedly overprints the line, select the print driver that ends in “LF” (e.g. Epson_LF). (3) If the printer skips a line when printing, select the print driver without “LF”. NOTE Most printers will have to be powered off and on between switch setting changes to accept changes. 4. SELF-TEST PROCEDURE The AVA has three methods of self-test and calibration. There are no adjustments required to guarantee the system is calibrated, because all measurements are based on a high accuracy, high stability voltage and frequency references. The accuracy of these references is constantly compared against secondary voltage and frequency references to insure measurement accuracy. a. The first basic type of self-test is performed every time the DAU is powered up. This power-up test takes approximately two seconds to complete and tests the following areas: 1. DAU to CADU Communications 2. DAU System Memory 3. DAU High Accuracy Voltage Reference 4. DAU High Accuracy Frequency Reference 5. DAU A/D Converter Operation 6. DAU Sample Memory Store This tests the machine's basic operation and ability to make measurements. If a test fails, a failure specific error message is returned to the CADU and reported on an error screen. b. The second type of test is performed at 24-hour intervals and is used for system calibration. This test takes approximately ten seconds to complete. The results of the calibration are stored in a non-volatile memory and are used to correct the measured data. At 24 hour intervals, the following tests are performed: 1. DAU to CADU Communications

Privacy Statement
Press Release
Contact