The Endevco Model 7257AT is a small, hermetically sealed
piezoelectric accelerometer with integral electronics,
designed specifically for measuring vibration on flight
test vehicles. This transducer offers the functions of
a flight test accelerometer and an airborne charge amplifier
in one small package. Its +/-2.5V full scale output is
biased at +2.5 VDC, which can be interfaced directly with
many telemetry systems. There is also a built-in 4-pole
Butterworth low-pass filter to provide the necessary out-of-band
signal suppression.
The Model 7257AT features Endevco's Piezite® Type
P-8 crystal element, operating in annular shear mode,
which exhibits excellent output sensitivity stability
over time. The transducer can be powered by any +15 to
+32 VDC supply commonly found on most flight vehicles.
The unit case is electrically isolated from the mounting
surface. Its center through-hole mounting configuration
allows 360° cable orientation flexibility. The first suffix
after the model number indicates acceleration sensitivity
in mV/g, the second suffix indicates the low-pass filter
upper corner frequency.
Features:
• Designed for flight test
• Biased at +2.5 VDC
• Operates from +15 to +32 VDC
• Built-in 4-pole low pass filter
• Light weight (28 gm)
• Hermetically sealed
• 360° cable orientation
• Ground isolated
The Endevco Model 7257AT is a small, hermetically sealed
piezoelectric accelerometer with integral electronics,
designed specifically for measuring vibration on flight
test vehicles. This transducer offers the functions of
a flight test accelerometer and an airborne charge amplifier
in one small package. Its +/-2.5V full scale output is
biased at +2.5 VDC, which can be interfaced directly with
many telemetry systems. There is also a built-in 4-pole
Butterworth low-pass filter to provide the necessary out-of-band
signal suppression.
