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iWorX ETH-256 Hardware Manual

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ETH-256 Amplifier with Isolated Headstage
Hardware
Manual
ETH-256
ETH-256C
iWorx Systems, Inc.
Overview
The ETH-256 is a high performance general-purpose life science research
www.iworx.com
amplifier. Its high input impedance and high Common Mode Rejection allows low
noise recording of biopotential signals, as well as outputs from strain gauge type
transducers, including force, displacement, and pressure transducers. The ETH-
256C includes the C-ISO-256 isolated headstage for recording ECG, EMG, and
LabScribe is a trademark of
EEG signals from humans.

iWorx Systems, Inc.
©2015 iWorx Systems, Inc.
The ETH-256 offers eight gain settings: x1, x5, x10, x50, x100, x500, x1k, and x5k.
Signals may be further conditioned using high- and low-pass frequency filters. All
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Summary of Contents for iWorX ETH-256

  • Page 1 LabScribe is a trademark of EEG signals from humans.
 iWorx Systems, Inc. ©2015 iWorx Systems, Inc. The ETH-256 offers eight gain settings: x1, x5, x10, x50, x100, x500, x1k, and x5k. Signals may be further conditioned using high- and low-pass frequency filters. All...

  • Page 2: Included Items

    Two-conductor 12 VAC power supply with a 3.5mm output plug (A-P12-AC-3.5) Package of 50 disposable electrodes (A-GC-7165) Front Panel The ETH-256 is divided into two units or channels with identical functions that are capable of making low noise, AC-coupled recordings of bioelectric potentials, or DC-coupled transducer recordings.

  • Page 3: Rear Panel

    Gain The gain of each channel on the ETH-256 can be adjusted independently. This allows very small signals to be amplified before presentation to the display device. The gain control push-button allows you to select among eight preset multipliers: x1, x5, x10, x50, x100, x500, x1k, and x5k.

  • Page 4: Technical Data And Specifications

    ETH-256 Amplifier with Isolated Headstage The BNC output connectors for the ETH-256 are located on the rear panel. They can be cabled to your data acquisition system using a BNC-BNC cable. The power transformer input and the power switch are also found on the rear panel of the ETH-256.
  • Page 5 BNC on the ETH-256 to the input of your iWorx data acquisition device. 2) Set the ETH-256 gain to x1, the low-pass filter to 5 Hz, and the high-pass filter to DC.
  • Page 6 Using a pH sensor with the ETH-256: 1) Set the ETH-256 gain switch to x1 and the low-pass filter setting to 50 Hz. 2) Put the electrode in pH7.0 buffer. Observe the output of the ETH-256 on your recording device.
  • Page 7 C-ISO-256, a gain of x1 set on the front panel will produce an electrocardiogram of between 0.5 and 5VDC. The ETH-256 can be used to record signals such as ECG, EMG, EOG, and EEG. It can also be used to measure potentials directly from muscles and nerves. Using the appropriate cables and electrodes, it is ideally suited for extracellular recordings from animal tissue with hook, pin, or suction electrodes.

  • Page 8: Troubleshooting

    The most likely cause in this case is the building AC. Use the 50 Hz low-pass filter on the ETH-256 and any AC notch filter that may be available on your recording software to minimize or remove this artifact.
  • Page 9 Are you adjusting the switches and controls on the correct channel? Are you sure about the connection to your data acquisition system? iWorx Systems, Inc. iWorx Systems, Inc. 62 Littleworth Road, Dover, New Hampshire 03820 www.iworx.com (T) 800-234-1757 / 603-742-2492 (F) 603-742-2455...

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