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Endevco Model 25B ISOMIN
The Endevco Model 25B ISOMIN is an extremely small,
adhesive mounted piezoelectric accelerometer with integral electronics,
designed specifically for measuring vibration on very small objects. The
unit weighs only 0.2 gm, reducing unwanted mass loading effects. The
"B" version of Model 25 offers a flexible, detachable coaxial
cable which can be replaced by the user in the field. This feature
provides extended service life when repetitive installations or heavy use
are expected. As with the "A" version, Model 25B is ideal for
measuring vibration in scaled models, small electronic components, and
biomedical research.
SPECIFICATIONS
The following performance specifications conform to
ISA-RP-37.2 (1964) and are typical values, referenced at +75°F (+24°C),
4 mA, and 100 Hz, unless otherwise noted. Calibration data, traceable to
National Institute of Standards and Technology (NIST), is supplied.
DYNAMIC CHARACTERISTICS Units
- RANGE: ±1000 g
- VOLTAGE SENSITIVITY:
Typical 5 mV/g
Minimum 4 mV/g
- RESONANCE FREQUENCY:50 kHz
- AMPLITUDE RESPONSE:
±5% 2 to 8,000 Hz
±1dB 1 to 12,000 Hz
- TRANSVERSE SENSITIVITY: ≤ 5%
- AMPLITUDE LINEARITY: < 2 to F. S.
OUTPUT CHARACTERISTICS
- OUTPUT POLARITY: Acceleration directed into the base
of the unit produces positive output
- DC OUTPUT BIAS VOLTAGE: +8.5 to +11.5 Vdc
- OUTPUT IMPEDANCE: ≤ 600 ohms
- FULL SCALE OUTPUT VOLTAGE: ± 5.0 V
- RESIDUAL NOISE: ≤ 0.007 equiv. g rms
- GROUNDING: Signal ground isolated from mounting
surface.
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