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Gas Turbine Combustion Instability Transducers
Brand : Bently Nevada

Gas Turbine Combustion Transducers

The Bently Nevada 3500/ 64M Dynamic Pressure Monitor is specifically designed to monitor combustor pressure pulsations indicative of combustion instabilities ( " humming" ) in gas turbines. Through the use of our 350500 interface module, a variety of pressure transducers* designed for these applications can be used with the 3500/ 64M.

Electrical Specifications
Power :
+ Supply Voltage ( at the module) :
- 19.60 Vdc to – 26 Vdc when no safety barriers are used
-17.75 Vdc to – 26 Vdc when safety barriers are used.
+ Supply Current : 14.68 mA maximum with no load11.69 mA typical with no load

Signal:
Input Sensitivity
Ordered option:
- 13.8 pC/ psi ( 200 pC/ bar)
- 16 pC/ psi ( 232 pC/ bar)
- 1200 pC/ psi ( 17, 404 pC/ bar)
- 12 pC/ psi ( 174 pC/ bar)
- 60 pC/ psi ( 870 pC/ bar)
+ Expected Sensor Pole-to-Pole Capacitance for different :

Input Sensitivities Input Sensitivity Option in pC/ psi:
- 13.8
- 16
- 1200
- 12
- 60

Nominal Pole-Pole Capacitance in picofarads:
- 320
- 60 to 90
- 6, 300
- 100
- 300

Output Sensitivity
Ordered option:
100 millivolt/ psi ( 1.45 Volt/ bar) ± 2% @ 150 Hz

+ Dynamic Range : ± 50 psi pk
+ Common Mode Rejection : -40 dB or better in the passband.
+ Output Resistance Frequency Response : 50 ohm typical
Ordered option:
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