LTT186 Transient Recorder

With its 160GB (optional even 320GB) IDE hard disk (shock resistance 200G, half sine wave at 2 ms) the system can be easily used under difficult and tough conditions. It is in particular this application flexibility that offers the user a high investment security.

Analogue inputs
 

• 100MHz maximum overall sampling rate
• 12 bit with 20 MHz maximum sampling rate per channel
• 16 bit with up to 2.5 MHz sampling rate per channel
• 8 (optional 16) differential inputs with ± 100 V surge protection
• Synchronised data acquisition for all channels
• Selectable input voltage range per channel: [± 1.0 V] to [± 50.0 V]
• 105 kΩ, 157 pF or 1 MΩ, 15 pF input resistance
• Various trigger options
• External trigger and clock
• Bandgap voltage reference for automatic calibration of each channel and amplifier

Digital inputs 

• 16 digital inputs via 37-pin SUB-D socket
• 20 MHz maximum sampling rate
• Digital Signal Processor
• High Performance DSP
• 128 MB RAM with 4ns access time, optional 512 MB

Interfaces
 

• Internal 160GB hard disk, optional 320GB
• USB interface with transfer rates up to 11 MB/s

Quality Features
 

• Automatic calibration with internal reference voltage source
• Amplifier bandwidth 4 MHz (typical 6.5 MHz)
• Anti-Aliasing Filter: Bandwidth 40% of the sampling rate (independent from channel)
• Stop-band Attenuation > 85dB
• DIN ISO 9001 certificated

With various internal and external trigger options and features, such as “Analog Persistence”, even searching for random irregular events becomes a child's play – and all this with the quality, accuracy and speed that are the hallmark of LTT products.

The housings are made from sturdy die-cast aluminium. An additional internal aluminium base protects the hard disk when operated in harsh environments.   

You can find an Application Report about testing of material and dummy behaviour for blast impact tests on tanks here: www.tasler.de/235

LTT-186 does not need drivers, is detected by the PC as a hard disk and immediately ready for use. The operating systems WinXP, WinVista and Win7 are supported. The recorders are delivered with a 9-36VDC (internal) / 100-240VAC power supply (external) which makes them perfect for both stationary and mobile applications.

LTT186 Transient Recorders are used on locations where it is too dangerous for humans and/or computers to stay for longer periods of time. Examples: Blasting and crash tests or lightning strike investigations.

The stand-alone units allow off-line recording from many channels with high sampling frequency or bandwidth. Constant data rates up to 19.6 MBytes/s or 9.8Msample/s overall sample rate can be provided. Short bursts with 200MBytes/s or 100MSample overall sampling rate into the internal RAM can also be programmed.

Even higher data rates can be achieved by synchronisation of several units.

The internal 160GB hard disk (optional 320GB) is filled up with one measurement or divided into 16 flexible sections. Each measurement allows different parameters such as trigger condition, channel count, sample frequency and recording time.