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 the desired channels. To remove a channel, select it by clicking somewhere in the channel itself or by clicking its associated channel number button (the channel does not have to be visible to be selected this way). Then choose “Edit > Remove Waveform”. To copy a channel, use control-c (command-c on a Mac). This is a keyboard shortcut for “Edit > Copy”. Only the selected area of the selected channel is copied, so choose “Edit > Select All” (control/command-a in recent versions of AcqKnowledge) before copying. If the destination graph window already exists and contains data, select the window and choose “Edit > Insert Waveform”. If the window does not yet exist, choose “File > New…” (control/command-n), and “OK” the default choice of “Graph Window”. Then choose “Edit > Paste” (control/command-v). This will only work for the first channel in a file; otherwise the “Paste” option adds the data at the current cursor position of the selected waveform.
Although the number of steps required to copy a waveform from one window to another is more than the number required to remove a waveform, if the number of waveforms to be placed in the destination file is smaller than the number of waveforms that are not to be copied, the second approach may be more efficient overall.
To transfer only some of the data from each channel, the most efficient method in recent AcqKnowledge versions is to use the I-beam tool or selection palette (“Display > Show > Selection Palette” or control/commnd-shift-=) to select an area of the graph. Then choose “File > Save Selection As…”. This will produce a new file containing all of the channels, but only the selected area of each.
For older AcqKnowledge versions that do not have the “Save Selection As” option, there are again two possible approaches, 1) remove the sections before and after the section to be saved, and 2) copy the selected area from each channel. To carry out the first option, use “Edit > Clear All” to remove the selected area of all channels at once. To carry out the second option, follow the steps laid out in the first paragraph of this Knowledge Base entry except for the “Edit > Select All” step. Instead, select the area to be retained. Then switch from the I-beam tool to the arrow cursor tool so that the selected area isn't changed if other channels are selected by clicking on them within the graph area.
The Ventilator Validation Kit supports new prototype development, existing design validation for production testing, mobile field testing and verification, and other uses where accurate pressure and flow measurements are critical. The Ventilator Validation Kit provides ventilator manufacturers and prototype developers with a complete solution for validating new medical/hospital-grade ventilator products intended for human use. The VVK100-SYS includes […]
New Ventilator Validation System Allows Device Manufacturers to Test Ventilator Pressure and Volume System supports rapid development and testing of hardware for COVID-19 treatment Goleta, California – March 24, 2020 BIOPAC Systems, Inc. announced a new Ventilator Validation System for engineering and device manufacturers to use when designing and testing new and existing ventilators for […]
Space Flight Simulations Prevent Disasters Under psychological and physical stress, astronauts can put their mission and crew in danger. Looking into this issue, researchers created a potentially catastrophic spaceflight simulation using a virtual reality environment and recorded the heart rate of participants. Psychophysiological responses to the potentially disastrous flight simulation were recorded using a BIOPAC MP […]