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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 Channels6
Input Sensitivity105 mV/ips
Input Impedance10,000Ω
Input CMMR @ 50Hz>40 dB
Maximum Input

9 V RMS (85 ips average @ 105mV/ips)

Input ConnectorXLR 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 FiltersDisabled, 70 Hz, 110 Hz, 200 Hz (0 dB to -1 dB at specified frequency and < -26 dB at half specified frequency)
IntegrationVelocity to Displacement

Display

 
TypeHigh Intensity Electro-Luminescent
Display Unitsips Average (Velocity) mils Peak-Peak Average (Displacement)
Display Range0-1, 0-10, 0-100, 0-1000 units
Measurement Resolution4 Digits
Display Functions

Display Hold, Peak Display, Peak Reset

Electrical Specification

 
Power Supply+28 V DC MIL-STD-704C
Max Power30 W
Physical Specification 
Dimensions

(L) 272mm, (W) 228mm, (H) 160mm

Weight4.0 Kg
Operating Temperature-20ºC to +55ºC
SealingDIN 40 050 IP44
EMC

DO-160E

EnvironmentalMil-Std-801F
European Conformity93/ 68/ EEC

 

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