Dual Mode Charge and IEPE with Long Distance TEDS™

Versatile Solutions for Conditioning both Piezoelectric Sensors and IEPE Sensors

The 28304 and 28324 Charge/IEPE Conditioners are four channel dual mode conditioners for either Charge or IEPE type sensors. The 28304 features a versatile 4- or 8-pole filtering with programmable characteristics for both time or frequency domain applications and a filtered bandwidth up to 204.6 kHz or an unfiltered wideband width of 500 kHz. The economical 28324 features 4-pole filters with filtered bandwidth to 30 kHz and unfiltered bandwidth of 170 kHz.

Both cards feature the T-Insertion feature can be used as an “Electronic Tap-Test” to verify all accelerometer channels quickly and easily from the convenience of the control room. Precision Filters’ LDTEDS™ (Long-Distance Transducer Electronic Data Sheet) can communicate with TEDS capable sensors out to a distance of 1500 feet.

The 28304 features patent pending REZCOMP™ transducer compensation technology that extends the useable frequency response of resonant sensors. REZCOMP is effective at compensating the seismic mass resonant response of an accelerometer, the organ pipe resonant response of a recessed mounted pressure sensor and the resonant response associated with the protective screen of a microphone sensor. Based on a characterization of the sensor Q and resonance frequency, the compensation technique extends the usable sensor bandwidth by a factor of 3 or more.

The 28304 and the 28324 are members of the Precision 28000 family of signal conditioners.

The 28000 Signal Conditioning System

Learn more about the 28000 Signal Conditioning System >

  • The 28304 and 28324 Charge/IEPE Conditioners Dual Mode Conditioners The 28304 and 28324 with Option 4, shown, both cards are available with Option 4

    MEASUREMENTS:

    • Load Measurements
    • Torque Measurements
    • Dynamic Force Measurements
    • Dynamic Pressure Measurements
    • Shock Measurements
    • Vibration Measurements
    • Acoustic Measurements
    • Piezoelectric Crash Tests
    • Ballistics Shock Testing
    • Machine Health Monitoring
    • Structural Response Tests
    • Flight Tests
    • Wind Tunnels
    • Ultrasonic Transducers

Dual Mode Charge and IEPE Conditioners Features:

28304 4-Channel Charge/IEPE Conditioner Features:

  • Four channels per card, 64 channels per 28016 chassis system
  • Dual mode: piezoelectric or IEPE
  • Ground Sense Input Mode allows grounded sensors
  • REZCOMP™ technology to extend frequency response of accelerometer, microphone and pressure sensor measurements
  • Up to 204.6 kHz “filtered” bandwidth or 450 kHz “wideband” bandwidth
  • Two charge conversion ranges for 10,000 or 100,000 pC FS inputs
  • T-insertion for health test of inaccessible accelerometers
  • Programmable IEPE current to 0, 4, 8, 12 mA
  • TEDS compatible
  • Programmable amplifier: x1/16 to x8192 with 0.05/vernier
  • 4 or 8-pole low-pass filters with programmable flat/pulse characteristics with filter bypass (wideband)
  • Optional 8-pole band-pass filter (4-pole high-pass and 4-pole low-pass filter)
  • 2° phase matching between any channels, 10 Hz to Fc
  • Overload detection
  • Precise automatic calibration
  • Auxiliary front panel output connection to support the use of custom output modules

View the 28304 4-Channel Charge/IEPE Conditioner Specification Sheet >

28324 4-Channel Charge/IEPE Conditioner Features:

  • Four channels per card, 64 channels per 28016 chassis system
  • Dual mode: piezoelectric or IEPE
  • Ground Sense Input Mode allows grounded sensors
  • Up to 30 kHz “filtered” bandwidth or 170 kHz “wideband” bandwidth
  • Two charge conversion ranges for 10,000 or 100,000 pC FS inputs
  • T-insertion for health test of inaccessible accelerometers
  • Programmable IEPE current to 0, 4, 8 12 mA
  • TEDS compatible
  • Programmable amplifier: x1/16 to x1024 with 0.05/vernier
  • 4-pole low-pass filters with filter bypass (wideband)
  • 2° phase matching between any channels, 10 Hz to Fc
  • 0.2° typical phase match 10 Hz to 30 kHz (unfiltered)
  • Overload detection
  • Precise automatic calibration
  • Auxiliary front panel output connection to support the use of custom output modules

View the 28324 4-Channel Charge/IEPE Conditioner Specification Sheet >

28304 and 28324 Comparison Chart

Card 28304 28324
Type Single Ended Charge,
IEPE (GND or ISO)
with Long Distance TEDS
Single Ended Charge,
IEPE (GND or ISO)
with Long Distance TEDS
Channels/Card 4 4
Channels/System 64 64
Applicable Transducer Piezoelectric or IEPE Sensor, Remote Charge Converter, AC Voltage Piezoelectric or IEPE Sensor, Remote Charge Converter, AC Voltage
Interface 2-Wire Coaxial on Combo-D 2-Wire Coaxial on Combo-D
Excitation IEPE Current, 0, 4, 8, 12 mA IEPE Current, 0, 4, 8, 12 mA
Bandwidth 0.25 Hz to 450 kHz 0.5 Hz to 170 kHz
Gain x1/16 to x8192 with
0.05% Resolution
x1/16 to x1024 with 0.05% Resolution
Filter 4, 8 Poles; FLAT/PULSE Low-Pass or Band Pass 4-Poles; FLAT/PULSE
Low-Pass
Cut Off Frequencies FLAT: 2 Hz to 204.6 kHz PULSE: 1 Hz to 102.3 kHz FX02: 300, 1k, 3k,
10k, 30 kHz*
Outputs (2) Buffered Single-Ended Outputs per Channel (2) Buffered Single-Ended Outputs per Channel

Charge and IEPE Conditioner Comparison Guide

Card 28304 28324 28316C 28302B
Type Single Ended Charge,
IEPE (GND or ISO)
with Long Distance TEDS
Single Ended Charge,
IEPE (GND or ISO)
with Long Distance TEDS
IEPE (GND or ISO)
with Long Distance TEDS
Single Ended or
Differential Charge, IEPE or Velocity Coil Input
Channels/Card 4 4 16 2
Channels/System 64 64 256 32
Applicable Transducer Piezoelectric or IEPE Sensor, Remote Charge Converter, AC Voltage Piezoelectric or IEPE Sensor, Remote Charge Converter, AC Voltage IEPE Sensor with TEDS (Optional) and AC Voltage Piezoelectric or IEPE Sensor, Velocity Coil, AC Voltage
Interface 2-Wire Coaxial on Combo-D 2-Wire Coaxial on Combo-D 2-Wire with Shield 2 Wire Coaxial or 3-Wire LEMO
Excitation IEPE Current, 0, 4, 8, 12 mA IEPE Current, 0, 4, 8, 12 mA IEPE Current: 0, 2, 4 or 8 mA IEPE Current: 8.5 mA
Bandwidth 0.25 Hz to 450 kHz 0.5 Hz to 170 kHz 0.25 Hz to 140 kHz 0.3 Hz to 20 kHz
Gain x1/16 to x8192 with
0.05% Resolution
x1/16 to x1024 with 0.05% Resolution x1 to x512 with
0.1% Resolution
PE: 1 to 200 pC/g
IEPE: 0.1 to 200 mV/g
Filter 4-Pole Low-Pass with optional REZCOMP, 8-Pole Low-pass or 8-Pole Band-Pass 4-Poles; FLAT/PULSE
Low-Pass
4-Poles; Time Delay or Butterworth 6-Pole HP, 6-Pole Low-Pass
Cut Off Frequencies FLAT: 2 Hz to 204.6 kHz PULSE: 1 Hz to 102.3 kHz FX02: 300, 1k, 3k,
10k, 30 kHz*
FX02: 300, 1k, 3k,
10k, 30 kHz*
HP: 0.3, 3, 10, 30, 100
LP: 50 Hz to 12.75 kHz in
50 Hz steps
PULSE: 1 HZ to102.3 kHz
Outputs (2) Buffered Single-Ended Outputs per Channel (2) Buffered Single-Ended Outputs per Channel (2) Buffered Single-ended Outputs per Channel (2) Accel, (2) Velocity,
(1) Displacement, (1) DC,
(1) Alarm
* Custom cutoff frequencies are available. Please consult factory.