Table 1. Error Reported on CADU Error Screen (cont.)

Table 1. Error Reported on CADU Error Screen (cont.) - TM-1-6625-724-13P_158

Table 1. Error Reported on CADU Error Screen (cont.) - TM-1-6625-724-13P_160

TM-1-6625-724-13P Aviation Vibration Analyzer Manual
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TM 1-6625-724-13&P 0025 00 0025 00-21 Table 1. Error Reported on CADU Error Screen (cont.) Code # Message 4182: Tacho Failure ACTION: (1) Verify connection (2) Verify gap or check tape for optical interrupter (3) Check cable DAU is receiving no timing pulses from the external magnetic or optical tachometer. Verify the following: 1. The interrupter is connected to the correct channel. 2. The interrupter is gapped properly and working. 3. The optical interrupter is aimed at the reflective tape 4. The correct cable is installed and working. Repeat measurements as necessary. This is a common problem caused by improper sensor connection to the DAU. 4183: ACQ Processor Error ACTION: (1) Power the DAU off and on (2) Wait 20 seconds, make a measurement Internal hardware/software fault. Power the DAU off and on, and then try to make a measurement. If the failure persists, send unit to TMDE for repair. 4184: Tach Frequency Too High ACTION: (1) Verify tach Installation (2) Check tach frequency (3) Check tape for optical interrupter The measured tachometer frequency is higher than the limits specified by the aircraft setup file. This is commonly caused by an aircraft with a double interrupter when the setup file expects a single interrupter. Verify the following: 1. The interrupter is the proper type and gapped correctly. 2. The rotor frequency is within the required operating range. For optical interrupters, verify the tape is placed correctly. 4185: Tach Frequency Too Low ACTION: (1) Verify tach Installation (2) Check tach frequency (3) Check tape for optical Interrupter The measured tachometer frequency is lower than the limits specified by the aircraft setup file. Verify the following: 1. The rotor under observation is rotating at the proper frequency. 2. The optical or magnetic interrupter is properly installed. Repeat measurements as required. 4186: Accelerometer Saturation, Internal Channel 1 ACTION: (1) Verify SETUP (Setup/Status in Manager Menu) (2) Change accelerometer type (3) Relocate accelerometer 4187: Accelerometer Saturation, Internal Channel 2 ACTION: (1) Verify SETUP (Setup/Status in Manager Menu) (2) Change accelerometer type (3) Relocate accelerometer 4188: Accelerometer Saturation, Internal Channel 3 ACTION: (1) Verify SETUP (Setup/Status in Manager Menu) (2) Change accelerometer type (3) Relocate accelerometer 4189: Accelerometer Saturation, Internal Channel 4 ACTION: (1) Verify SETUP (Setup/Status in Manager Menu) (2) Change accelerometer type (3) Relocate accelerometer 4193: Tacho Sample rate Phase Lock Error ACTION: Decrease the rate of rotational acceleration or deceleration This error indicates the tachometer frequency is changing too rapidly to make accurate measurements. Slow the rate of tachometer frequency change and repeat the measurements. This error can occur on SSTA or SSPA vibration measurements. 4194: Rect. Window Size not Power of Two ACTION: (1) Power the DAU off and on (2) Wait 20 seconds, make a measurement

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