MODEL 161 SIGNALCONDITIONERAPPLICATIONS••••Instrumentation Labs
Field Testing
Process Monitoring
Vibration & Shock Testing

FEATURES••••••Interface with Charge and IEPETransducers
4 channels, Accel, Vel, and Disp Output
Battery Power Option
Wide Bandwidth, Low Noise
Low and High Pass Filter Settings
Support IEEE 1451.4 TEDSSPECIFICATIONS
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4-Ch IEPE & Charge Amplifier/Conditioner
Acceleration, Velocity, Displacement Output
Built-in Low-Pass & High-Pass Filters
100kHz Bandwidth
AC or Battery Power Operation

The Model 161 series is a 4-channel signal conditioning amplifier
designed to be used with piezoelectric accelerometers (IEPE orCharge) and most other piezoelectric based transducers. The Model161 series incorporates front-panel controlled gain adjustments,
multiple high-pass and low-pass filter settings, and it is capable ofdisplaying IEEE 1451.4 TEDS information. The signal conditioner
features broad bandwidth to 100kHz and 10Vpeak linear output. For
various vibration applications where velocity and displacement
information are desired, analog integration functions are included asoutput options with a push of a button.
The Model 161A is 110/220VAC powered, and includes a matingpower adaptor.

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MODEL 161 SIGNAL CONDITIONERPERFORMANCE SPECIFICATIONSINPUT SPECIFICATIONS
Charge Input<100,000pC, Single ended, BNC input connector

Charge Input Sensitivity Range

0.001pC/unit to 999.0pC/unit (unit may be g, m/s2, etc.)

Charge, Source Capacitance<30,000pF

Charge, Source Resistance>10 MΩIEPE Input<22 Volts (AC+DC components), Single ended, BNC input connector

IEPE Input Sensitivity Range

0.01mV/unit to 999.0mV/unit (unit may be g, m/s2, etc.)

IEPE Current Excitation

4mA

IEPE Compliance Voltage

24 Volts

IEPE Input Impedance>100 MΩ, 30,000pF

OUTPUT SPECIFICATIONSAC Voltage

Single ended (referenced to signal ground), short circuit protected, BNC output connector

Output Impedance<100 Ohms

Output Current

35mA maxLinear Output±10V peak

DC Offset

20mV max (10Hz – 100KHz, 10V/unit)

TRANSFER CHARACTERISTICS
Output Sensitivity Range Settings

Charge : 100µ, 316µ, 1m, 3.16m, 10m, 31.6m, 100m, 316m, 1, 3.16, 10 (V/unit)
IEPE: 100µ, 316µ, 1m, 3.16m, 10m, 31.6m, 100m, 316m, 1 (V/unit)

Accuracy±0.5% of full scale (max), at 1kHz, filters disabled, gain >1

Linearity±0.1% of full scale, best fit straight line at 1kHz reference

Noise

Measurement Condition : Internal 10KHz low pass filter is enabled.
Charge : 0.062 pC rms (RTI) plus 0.004 pC rms per 1000pF of source capacitance ref to input.
IEPE : 110uV rms refered to input. Input shunted with a 249Ω resistor.

Frequency Response0.1 Hz to 100 kHz (full power band width), -3db referenced to 1kHz

Low-pass Filter (-3dB corner)

100Hz, 1kHz, 3kHz, 10kHz, 30kHz, 100kHz

High-pass Filter (-1dB corner)

0.1Hz, 1Hz, 3Hz, 10Hz

Crosstalk Between Channels

100 db RTI

POWER REQUIREMENTS
Voltage

18-24VDC from supplied 110/220VAC power adapter

Power dissipation

12W typical

PHYSICAL CHARACTERISTICS
Weight & Size

2.85kg (6.28lbs); H x W x D: 115 (4.5) x 180 (7.1) x 310 (12.2) mm (inches)

Case Material

Anodized aluminium

Operating Environment

0°C to +75°C, <90% Relative H umidity

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MODEL 161 SIGNAL CONDITIONERLAYOUTThe velocity and displacement signals are obtained from single anddouble integrations of the acceleration signal. Piecewise integral
method is used to calculate velocity and displacement output.

ORDERING INFORMATIONPART NUMBER

DESCRIPTION

161A
161B

IEPE & PE Signal Conditioner, 110/220VAC
IEPE & PE Signal Conditioner, 110/220VAC and Rechareable Battery Option

OPTIONAL ACCESSORIESDESCRIPTION

AC-G03294

10-32 Microdot to BNC input adaptor for charge type transducer

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