Rotortuner RT-EVA
The Rotortuner RT-EVA is a six-channel, parallel vibration measurement system for use on aerospace gas turbine engines.
Description
RT-EVA provides the facility to carry out basic engine vibration measurement, monitoring, and analysis in accordance with OEM mandated transducer installations, in particular on engines used on older aircraft, such as the Lycoming T64, T53, or Gnome engines.
With its digital display, RT-EVA provides a simultaneous live readout for all vibration channels and superior readability when compared to more dated needle meter displays types of equipment.
Hardware
RT-EVA is a single lightweight unit, portable, rugged, and suitable for use both in a laboratory or on-aircraft environment. The unit contains a high-intensity electro-luminescent screen which provides interference-free operation in an environment where high levels of ambient vibration exist and remain easily readable even in bright sunlight conditions.
Measurement technique and functionalities
The system will process measurements from all 6 channels simultaneously, using differential type self-exciting transducers, applying a single stage of integration to the input signal to achieve a displacement output reading. These results are presented in the form of a bar chart and text format concurrently for ease of data interpretation. A ‘Peak Level’ marker on the bar chart indicates the maximum recorded vibration level from each input channel, allowing the easy identification of ‘limit exceedances’. The ‘Hold’ facility permits the capture of rapidly changing information on the screen for more accurate data recording.
Configuration and filter application
Designed for total configuration flexibility, RT-EVA allows the individual channel signal condition filters to be either disabled or selected on to the correct frequency in accordance with the specific engine manufacturer test procedure. The system can also be configured to display results globally in either velocity units ‘is average’ or displacement units ‘mils pk-pk average’.
Product Specification
Input Channels | |
No. of Channels | 6 |
Input Sensitivity | 105 mV/ips |
Input Impedance | 10,000Ω |
Input CMMR @ 50Hz | >40 dB |
Maximum Input | 9 V RMS (85 ips average @ 105mV/ips) |
Input Connector | XLR type III |
Frequency Response | ±10% (5 Hz – 20 kHz, Velocity, signals above 0.02 ips average) ±2% (20 Hz – 10 kHz, Velocity, signals above 0.02 ips average) ±2% (20 Hz – 2 kHz, Displacement, signals above 0.2 mils pk-pk) |
Signal Conditioning | |
HP Filters | Disabled, 70 Hz, 110 Hz, 200 Hz (0 dB to -1 dB at specified frequency and < -26 dB at half specified frequency) |
Integration | Velocity to Displacement |
Display | |
Type | High Intensity Electro-Luminescent |
Display Units | ips Average (Velocity) mils Peak-Peak Average (Displacement) |
Display Range | 0-1, 0-10, 0-100, 0-1000 units |
Measurement Resolution | 4 Digits |
Display Functions | Display Hold, Peak Display, Peak Reset |
Electrical Specification | |
Power Supply | +28 V DC MIL-STD-704C |
Max Power | 30 W |
Physical Specification | |
Dimensions | (L) 272mm, (W) 228mm, (H) 160mm |
Weight | 4.0 Kg |
Operating Temperature | -20ºC to +55ºC |
Sealing | DIN 40 050 IP44 |
EMC | DO-160E |
Environmental | Mil-Std-801F |
European Conformity | 93/ 68/ EEC |