The following procedure will allow you to paste Append markers with the data. Use the Analysis->Find Cycle function to place markers in the data at the time when the append markers…
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It is possible to validate the signals coming from any DA100A/B/ or C amplifier by using a CBLCAL* Calibration Cable. The cable connects to the front of the amplifier and…
It is extremely rare for there to be a good reason to export all data to a spreadsheet because spreadsheet programs are not designed for the analysis of the types…
In DC mode, the absolute level of the signal is recorded; no high pass (HP) filters are applied. DC mode is useful for recording signals such as temperature, force,…
Taking a deep breath and then holding it increases intrathoracic pressure (pressure inside the chest cavity), which compresses veins returning blood to the heart causing a temporary decrease in venous return…
Taking a very deep breath and then exhaling, reflexly elicits a general phasic sympathetic discharge, causing a small increase in sweating, which increases electrical conductivity of the skin, thus resulting…
BIOPAC offers a noninvasive cardiac output amplifier (NICO100C) and an electrical bioimpedance amplifier (EBI100C). NICO10C is more appropriate if you are primarily interested in recording cardiac output. EBI100C is more suitable…
Disc I/O error 5000 indicates a file system permissions error. Make sure the user account has sufficient permissions.
Discontinued items—Click the item for Specs & Setup Contact BIOPAC to discuss other options. AC100A power supply – use AC300A Accelerometers 5 G: SS26LA now SS26LB, TSD109C now TSD109C2, SS26B…
To duplicate a waveform, select the waveform (channel) and click “Edit > Duplicate Waveform”. For Windows versions of AcqKnowledge older than version 4.0: When selecting the waveform, BIOPAC recommends choosing…
AcqKnowledge software provides a fully automated ECG analysis system. The software automatically identifies and marks the points of the ECG complex. It also calculates the amplitudes and timing intervals and…
The best solution is to avoid the ECG artifact in the first place. The problem is typically solved by adjusting the placement of the electrodes. Place the EMG electrodes so…
The ECG100C amplifier has a built-in R-wave detector mode. In this mode, the amplifier outputs a peak at every R-wave, which significantly improves the quality of the signal and helps…
BIOPAC offers a variety of setups for recording electrodermal activity, including Reusable: skin conductance transducer (MP150+TSD203 or MP36+SS3LA) and electrodermal gel (GEL101). Disposable: MP150+EDA100C amp with 2 x LEAD110A or MP36+SS57LA EDA…
In some MRI installations, there may be an offset in EDA measurements. The following steps can be performed in order to calibrate skin conductance measurements: Install all cabling and place…
The easiest way to remove a portion of your record is to highlight the undesired segment and select Edit > Clear. The section of the data on the selected channel…
AcqKnowledge includes digital filters that allow you to filter a raw EEG into the following frequency bands: Delta 0.5-4Hz Theta 4-8Hz Alpha 8-13Hz Beta 13-30Hz Gamma 36-90Hz (in some older…
Reference corresponds to the VIN- connection on EEG amplifiers; on the MP3X, if using the SS1LA lead adapter, VIN- is on the lead adapter. Use each ear as a reference…
Here are some suggestions for overcoming the problem of stimulation artifact when applying a stimulation voltage to a muscle. Have the ground between the stimulating electrodes and the recording…
The “Electrode Check” port on the front panel of MP36 and MP35 units is dseigned to measure impedance. As a rule of thumb, impedance levels below 10 kOhms are ideal,…
SALT CONTENT Disposable Electrode Chloride % EL500 10% EL501 10% EL502 4% (solid gel) EL503 7% EL504 4% (solid gel) EL507 0.5% EL508 10% EL509 n/a: dry electrode—use your own…
Cardiographic Electrode Tape is commonly used to perform noninvasive cardiac output measurements using bioimpedance. BIOPAC clip leads will connect cardiographic electrode tape (such as tape manufactured by IFM) to NICO…
Definitions: EDA = electrodermal activity SRR = skin resistance response SRL = skin resistance level SCR = skin conductance response SCL = skin conductance level SPR = skin potential…
Comparison and reproducibility of sEMG during manual muscle testing on land and in water Journal of Electromyography and Kinesiology 21 (2011) 95–101 W. Matthew Silversa,*, Dennis G. Dolnyba Exercise Science,…
Unlike the full version of Biopac Student Lab software, the BSL Analysis version used by many students outside the lab does not directly support the opening of Lesson and sample…
The EOG100C amplifier can record from DC to 100 Hz and is designed to measure a signal correlated with the corneal-retinal potential (the small electrical potential difference between the cornea and…
The following is a brief overview of the steps to verify that the USBETH is installed correctly—for more detailed instructions, click to open App Note 280 – ETHUSB Not Communicating on Mac. 1.…
Why aren’t event marks always placed correctly by automated analysis routines? Outliers in graph data—such as noise or other signal artifact—may result in the unwanted or inaccurate placement of event marks…
Issue: Excel files generated by AcqKnowledge or Biopac Student Lab open with ‘Protected View’ in Excel. Resolution: (Depending on the IT policies in place, you may require administrator privileges to implement…
The software is backwards compatible, so newer software should not have trouble opening files created by older software. However, as the software is developed, new features are added. Older versions…
SPSS supports file formats that are also available in AcqKnowledge – Excel and text file. For unusual circumstances when all of the data are to be imported to SPSS, “File…
When exporting AcqKnowledge files to MATLAB® via “File > Save As…”, event marks are not exported with the data. To get event mark information into a MATLAB file, there are…
Channel contention must be considered when connecting the analog output sourcing from external devices to an MP1X0 Data Acquisition System. Considerations for MP160 or MP150 users follow; MP100 users should refer…
To create a new file that contains only some of the channels in the original file, there are two possible approaches, 1) remove the unwanted channels, and 2) transfer only…
In general it is much better to collect high quality data than to spend time and effort formulating methods to extract information from data riddled with artifacts. For advice on…
In AcqKnowledge for Mac OS, the FIR Filter (Low Pass) transformation is performed with Bartlett windowing regardless of the selection, which reduces the signal amplitude. Work-around: Use the IIR filter…
The following issue exists on AcqKnowledge 3.9.x for Mac: FIR Filter: Windowing selection reverts to Bartlett and then filters the data.
Normally when you install the Adobe Flash player, you do so with a web browser. The Adobe website extracts information about your browser when you are performing this installation. Under…
Q: What’s being measured? Q: Areas potentially available for study? Q: Response times? Q: BNC Trigger delay? Q: Placement guidelines for sensor? Q: Strengths and limitations of fNIRS? Q: Identify…
MP160 and MP150 data acquisition systems incorporate staggered sections of isolation: Primary (mains power) isolation is provided by an external IEC60601-1 specified power supply (AC150A); Secondary isolation is provided by…
Only GEL101 (a solution designed to mimic the salt concentration of sweat) should be used with reusable skin conductance (electrodermal activity) recording electrodes. GEL101 electrode paste is specially formulated with…
Accuracy The degree to which something is true or exact. As an example, consider the characteristics of the TSD202A temperature transducer. With this transducer, there is an intrinsic accuracy of…
The AcqKnowledge Lab Assistant software promotes lab efficiency and full compliance with the Food and Drug Administrations (FDA) Good Laboratory Practice (GLP) requirements (21 CFR Part 11). The Lab Assistant…
To interface a Gould transducer to BIOPAC hardware, you will need an interface cable from FOGG SYSTEM and a BIOPAC interface. Many BIOPAC interface options are supported. On the FOGG…
The terminology for electrical connections to human subjects is not universally agreed upon. “Ground” and “reference” are often used interchangeably. This is not a good practice as there are different…
When a single subject is connected via wires to a single MP system, there should generally be one and only one ground connection to that subject*. When multiple subject grounds are…
BIOPAC recommends the following paper as an excellent reference for guidelines for GSR, EDA, EDR, SCL, and SCR: Psychophysiology, 49 (2012), 1017–1034. Committee report. Publication recommendations for electrodermal measurements. SOCIETY…
The Society for Psychophysiological Research makes Guidelines articles and SPR Presidential Addresses from Psychophysiology available (in Adobe PDF format) as a courtesy. SPR Guidelines papers include: Publication guidelines for heart rate studies…
To extract Cardiac Output values from impedance cardiography data if subject height/weight was not recorded, set the stroke volume method to Kubicek. Subject height and weight are not needed for the Kubicek/Rho method, but…
High pass filters attenuate the components of a signal below a certain frequency range. They help to remove lower frequency variation — possibly due to signals that are uninteresting in…
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