Charge output accelerometers are used in applications where:

• High temperatures environments are encountered.

• High radiation environments are encountered.

• Very high frequency accelerometers are used, where no room exists for internal electronics.

Charge output accelerometers are self-generating, so no excitation is required but a local charge amplifier is used to convert the charge output to a voltage. The charge output accelerometers do, however, have high output impedance. This high output impedance makes them susceptible to noise, cable movement (tribo-electric effect) and low insulation resistance. To minimize these effects, it is important to have a charge amplifier, impedance converter mounted as close to the accelerometer as possible to prevent cable movement, use low noise co-axial cable and ensure all surfaces are kept clean and dry.

Installing a charge output accelerometer and clamping low noise co-axial cable charge amplifier is located as close to accelerometer as possible, but away from the hostile environment