CH6I0 pages

CH6I Sensor

Low Frequency & Low Noise
Integral Preamp Acoustic Emission Sensor
Description and Features

Operating Specifications

The CH6I sensor is a low frequency, resonant, acoustic
emission sensor with an integral, low noise, filtered,
40 dB preamplifier, that can drive up to 3000 feet of cable.
The sensor comes standard with PAC’s unique “Auto Sensor
Test” (AST*) function.

t Dynamict

The CH6I features a strong, insulated, lightweight, aluminum alloy, integrated body structure that is color-coded
green to identify the sensor model. This sensor’s outside
shell is anodized, providing a nonconductive finish to
prevent any possible electric shorts from metal testing
structures. It is the same size and has the same frequency
response and sensitivity as the older R6I sensor. The EMI
shielding ability of the CH6I has been improved by more
than 300% compared with previous versions.

Applications
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Metal, concrete and composite structures that require
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Ideal for fiberglass structure tests (i.e. bucket trucks,
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Pipeline testing, where long distance sensor monitoring
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Leak detection for large sensor spacing

Peak Sensitivity, Ref V/(m/s); Ref [V/µbar].............117 [-23] dB
Operating Frequency Range. ............................. 40 – 100 kHz
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Resonant Frequency Ref V/(m/s); Ref [V/µbar].........55 [98] kHz
Directionality. .................................................... ±1.5 dB
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t Electrical
Gain.
...................................................................40 dB
Power Requirements..............................16 - 30 Vdc @ 25 mA
Dynamic Range..................................................... >80 dB
Output Voltage....................................... 20 V peak to peak
Noise Level (RMS rti)............................................. <2.4 µV
Output Drive Impedance. ...........................................50 Ω
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Sensor Drive Capability........................ up to 3000 ft (1000 m)
AST Pulse. .......................... 24 V, 3 microseconds into crystal
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Grounding................Case grounded, isolated from sensing face

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Temperature Range. ......................................... -35 to 75ºC
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Shock Limit........................................................... 500 g
Completely enclosed crystal for RFI/EMI immunity

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Dimensions. ......................1.13” dia x 1.54” h (29 x 39.2 mm)
.
Weight............................................................ 56 grams
Case Material................. Green color, anodized aluminum alloy
Face Material..................................................... Ceramic
Connector.............................................................. BNC
Connector Locations................................................. Side
Seal................................................................... Epoxy
Matching Cable. ................................................... 1234-X
.

Ordering Information and Accessories
Cable (specify cable length).............................................1234 - X
Magnetic Hold-Down . ...................................................... MHR6I
.
Amplifier....................................................................... AE2A
Sensors include
NIST Calibration Certificate, Auto Sensor Test Function & Warranty

Frequency response of the CH6I. Calibration based on ASTM E1106;
Calibration based on ASTM E976.

* AST — Auto Sensor Testing feature allows AE systems to control the sensor as a pulser
and a receiver at the same time. It can therefore characterize its own condition as well
as send out a simulated acoustic emission wave that other sensors can detect, so the
condition of the nearby sensors also can be tested.

195 Clarksville Road, Princeton Junction, NJ 08550 Phone: 609-716-4000 t
Fax: 609-716-0706 Email: sales@pacndt.com Internet: www.pacndt.com
A Member of MISTRAS Group Inc.
Due to continuing improvement, Physical Acoustics Corp. (PAC) reserves the right to amend specifications without notice.
Copyright © 2008 MISTRAS Group Inc. All Rights Reserved.

Rev. 10/05 #117503