350500-00-01-00-00-05 Bently Nevada Dynamic Pressure Charge Amplifier

Description:

The 350500 Dynamic Pressure Charge Amplifier (DPCA) is a component in a dynamic pressure sensing system. This sensing system, which monitors pressure pulsations that result from combustion instability in gas turbine engines, consists of a charge-coupled piezoelectric pressure sensor, low noise interconnect cable, 350500 charge amplifier, and monitoring device.

The dynamic pressure sensor should be a high temperature piezoelectric type that converts dynamic pressure to an output signal scaled in pico-coulombs per unit of pressure.The 350500 charge amplifier design allows its use with a number of sensors designed to monitor combustion instability.

The interconnect cable, which connects the sensor with the charge amplifier, is a specially designed low-noise,environmentally robust cable. The 350500 DPCA offers two interconnect cable options.

The 350500 charge amplifier converts the sensor charge signal to a low impedance voltage output signal. This signal is suitable for Bently Nevada monitors such as the Bently Nevada™ 3500/64 Dynamic Pressure Monitor. The electrical interface from the monitor to the charge amplifier, which consists of –24 Vdc power, common, and signal, is the same as that for a Bently Nevada Proximitor. Appropriate safety barriers can be used between the charge amplifier and the monitoring device.

350500 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 load
11.69 mA typical with no load

Sensitivity
100 mV/psi ( 1.45 V/bar)
±2% @ 150 Hz

Dynamic Range ±50 psi pk
Common Mode Rejection  -40 dB or better in the passband
Output Resistance Frequency Response

50 Ω typical Ordered option: High or Low

Ordering Information

Frequently Asked Questions:

1.What is the payment term?

3.What's lead time if item out of stock?

8-10 Weeks