Highlights:
- Measures Shock, Vibration & Temperature
- Options for Humidity, Pressure, Strain, Load and More
- New -- Download via serial & USB.
- Built-in PR Triaxial Accelerometer
- On-board Memory up to 4MB for EDR-3C, 8 MB for EDR-3D
- New Sliding Window Overwrite Mode
- New Event Type Memory Partition
- Up to 6 High-Speed Accel Channels
- Precision Low Noise True 10 Bit A/D
- Selectable Sampling Frequency to 3.2 kHz/CH
- Programmable Trigger Schemes
- Automatic Offset Correction (for DC accelerations, Bridge Balancing)
- Vibration Controller Compatibility for Field Data Replication, PSD Profiles
- Battery Powered, up to 30+ Days , 60 Days with New "Powersave" feature
- Small Size: 37 cu in, 2.2 lb.
- Powerful Windows 95/98/NT/2000/XP Software Included
- Easy to Set Up and Use
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Description
The EDR-3C is a portable impact, shock and vibration logger, recorder and detector combo unit and has a built-in triaxial accelerometer that’s designed to measure shock, vibration, temperature and (as an option) humidity, pressure, or resistance-bridge devices. The programmable unit tags all acceleration events with a time and date to provide a time history of the dynamic environment experienced during a recording session.
The EDR-3C series impact, shock and vibration combo recorders offer you a time-tested reputation for proven performance and reliability with hundreds of successful installations since 1989. The EDR-3C series operates similarly and differs only in programmability features, on-board memory and channel capacities. Each impact, shock and vibration combo recorder is powered by a specially designed C-Cell battery pack (9 Volt optional.)
The EDR-3C impact, shock and vibration combo recorder is used in conjunction with DynaMax programs and downloads the EDR-3C's memory via an IBM compatible personal computer using serial & USB. Together, the EDR-3C and the DynaMax software program provide a powerful tool for accurately recording and analyzing dynamic environments.
Operation of the Instrument
During recording acceleration, with the built-in triaxial accelerometer, signals are digitized to 10 bits and stored in on-board memory. The choice of a 10-bit A/D allows for precision, low noise measurements while still making effective use of available data memory and battery power in comparison to 8 or 12-bit systems. The EDR-3C series impact, shock and vibration combo recorders are capable of recording nearly 3 hours of equivalent real-time data over a typical 100 Hz vibration analysis bandwidth for typical ground applications. If you're interested in getting a handy spreadsheet for use in calculating memory usage based on your own specifications, contact us and we're happy to e-mail it to you.
Total Equivalent Recording Time (minutes).
| Bandwidth (Hz) |
Total On-board memory (MB) |
| 1 |
4 |
8 |
| 60 |
34 |
140 |
282 |
| 100 |
20 |
85 |
171 |
| 500 |
4 |
17 |
34 |
| 1,000 |
2 |
8 |
17 |
Triggering
Advanced data management capabilities of the EDR-3C impact, shock and vibration recorder, detector and logger combo unit allow the unit to measure and record over 5,000 separate 3 or 6-channel waveform sets consisting of transient shock events and/or continuous vibration time samples. IST's unique "Event Type Partitioning" of separate time-triggered and event-triggered data may also be performed during recording. This feature makes post-collection data reduction and indicator analysis easier. The length of each event is also selectable between event types, enabling the unit to be optimized for capture of both shock and vibration data during a single recording session.
Temperature and Humidity Recording
The EDR-3C series impact, shock and vibration recording combo unit also measures and records environmental temperature using a sensor built into the unit and/or an externally connected temperature sensor. Optional internal and external relative humidity sensors are available.
Pressure Recording
The EDR-3C series impact, shock and vibration recording combo unit can measure various pressures -- atmospheric pressure, or differential pressure for shipment under positive pressures, and other configurations. These can be provided as external sensors.
Strain, Load and other Resistance Bridge (strain-gage based) Sensors
The EDR-3CM4 and EDR-3DM4 impact, shock and vibration recorder, detector and logger combo unit is available for up to six channels of differential inputs, for resistance-bridge sensors. Contact IST for details on these configurations.
Auto-Zero Offset Control
The EDR-3C impact, shock and vibration recorder provides automatic digital offset correction between recording events. This feature compensates for DC offset resulting from temperature variation, as well as changes in orientation.
Accelerometers
Each EDR-3C impact, shock and vibration recorder, detector and logger combo unit is supplied with a specially designed and calibrated built-in triaxial accelerometer. The internal accelerometers are piezoresistive devices, offering superior low frequency response characteristics and extremely low power consumption. Acceleration recording can be configured for the internal triaxial accelerometer channels or up to 3 optional external accelerometer inputs.
External Accelerometers
The optional external accelerometer input channels are designed for use with "low bias" versions of ICP piezoelectric voltage mode devices. External channels provide signal conditioning, filtering, and constant current excitation for use with voltage mode accelerometers.
External Input Triggering
An external bi-directional trigger channel is available as an option on all EDR-3C impact, shock and vibration recorder, detector and logger models.
Flexible USB & Serial Communication
The EDR-3C and -3D impact, shock and vibration recorder, detector and logger combo units offer a special serial communications port for standard or high speed serial data transfer to a host PC. The specially designed serial port enables standard communications at 9600 Baud as well as high speed data transfers at 115 kBaud. USB (serial port emulation) option is now also available.
Advanced Programmability
Our impact, shock and vibration recorder, detector and logger combo recorders are set up using a standard PC serial port along with IST's DynaMax software package. After field recording, data is transferred back to the host PC for processing and analysis. The EDR-3C is completely user-programmable for accurate recording of either (transient) shock and/or pseudo-stationary vibration data. The instrument may be set up to operate under both event (amplitude-based) and/or time (periodic) triggered recording.
Data Management
Several different data management features are available for handling large numbers of captured time histories. Fill & Stop memory mode records all frames satisfying the trigger condition sequentially in time until the digital memory within the instrument is filled. A second Overwrite memory mode option records a selectable number of events having the largest RMS levels of all events measured.
Sliding Window Overwrite Mode (SWO)
The EDR-3C and -3D impact, shock and vibration recorder, detector and logger combo models offer a powerful new feature called Sliding Window Overwrite (SWO) developed exclusively by IST. SWO provides the advantages of overwrite mode and much more. With SWO the field test period is effectively partitioned into a user selectable number of time windows or bins. The size of the time windows is selected by the user. Event overwriting can only occur within the respective time windows.
Improved Laboratory Simulation
SWO enables the user to uniformly capture selective highest-level "time windows" of data during a field test. Recorded SWO can be processed with IST's DynaMax DM-psd software module to generate a separate PSD (Power Spectral Density) for each time window, or any subset of the data desired.
Vibration Test System Compatibility
Data recording with all EDR-3C impact, shock and vibration combo models can be processed with IST software for direct compatibility with virtually all digital vibration controllers.
Performance History
The EDR-3C impact, shock and vibration series combo recorders have been used in a broad range of high-performance applications world-wide for several years. A few of the more prominent applications using the EDR-3C include:
- The recorder of choice by damage prevention professionals at most major U.S. Railroads
- Mandated by U.S. Auto Club as the "crash recorder" for all INDY race cars
- Selected by NASA for measuring cargo bay vibrations aboard the U.S. Space Shuttle
- Selected by NASA Prime Contractor for continuous monitoring of rail car transportation of all Shuttle Solid Rocket Motors
- Selected by many Fortune 500 companies for use in shipment monitoring
- Selected by numerous D.O.D. contractors for ground transport monitoring of critical aerospace hardware.
- In use by most major small parcel delivery service companies
Certifications
The EDR-3C impact, shock and vibration recorder, detector and logger combo series has several certifications allowing it to be used in many useful applications. Contact IST if you've got a specification, chances are we have equipment to meet your specs:
- Meets MIL-STD-810F, most test methods
- Non-incendive environments (intrinsic safety)
- Flight Qualified (MIL-STD-461 RE02)
- Manned Space Flight Qualified by NASA
Applications
The EDR-3C impact, shock and vibration recorder, detector and logger series combo recorders have been designed for applications that require remote, unattended monitoring and recording of shock and vibration data over long periods of time. Their ultra-small size and weight, combined with their extraordinary recording and programmability features make them ideal for applications where space and weight come at a premium. Since human monitoring during recording is not required, personnel cost associated with the field testing using the EDR-3C impact, shock and vibration combo unit combo recorders can be reduced significantly. The instruments also provide a high degree of operational reliability under harsh environmental test conditions.
Specific applications of the EDR-3C include:
- Intermodal Transport Studies
- High-Value Transport Monitoring
- Vibration Test Spec. Development
- Launch Vehicle Vibration
- Avionics Environmental Reliability
- Concealed Monitoring
- Package Test Shipments
- Railcar Impact and Vibration
- Crash Recording
- Aircraft Flight Vibration
- Brake Testing
- Environmental Test Level Qualifications
- In-Use Environments
- Structural Seismic Measurements
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