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Summary of Contents for ADInstruments PowerLab
- Page 1 GALVANIC SKIN RESPONSE AMPLIFIER Owner’s Guide...
- Page 2 This document was, as far as possible, accurate at the time of release. However, changes may have been made to the soft ware and hardware it describes since then. ADInstruments Pty Ltd reserves the right to alter specifications as required. Late-breaking information may be supplied separately.
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Page 3: Safety Notes
That is, no product supplied by ADInstruments is intended to be used to diagnose, treat or monitor a subject. Furthermore no product is intended for the prevention, curing or alleviation of disease, injury or handicap. -
Page 4: Regulatory Symbols
CE Mark. All front-end amplifiers and PowerLab systems carry the CE mark and meet the appropriate EU directives. Refer to booklet symbol. This symbol specifies that the user needs to refer to the Instruction manual or the booklet associated with the device. -
Page 5: Safety Standards
General Safety Instructions To achieve the optimal degree of subject and operator safety, consideration should be given to the following guidelines when setting up a PowerLab system either as stand-alone equipment or when using PowerLab equipment in conjunction with other equipment. - Page 6 • Do not touch the subject to which the PowerLab (or its peripherals) is connected at the same time as making contact with parts of the PowerLab (or its peripherals) that are not intended for contact to the subject. • Cleaning and sterilization of equipment should be performed in accordance with manufacturer’s instructions.
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Page 7: Cleaning And Sterilization
PowerLab system without having to remove the covers. Follow the instructions for the testing device if performing such tests. If the PowerLab system is found not to comply with such testing you should contact your PowerLab representative to arrange for the equipment to be checked and serviced. - Page 8 Chapter 2 Overview The PowerLab system consists of a recording unit and application programs that run on the computer to which the unit is connected. It provides an integrated system of hardware and soft ware designed to record, display, and analyze experimental data.
- Page 9 In addition, each front-end requires a separate connection to one or more analog input channel(s) of the PowerLab. External signals are acquired through the PowerLab analog inputs and amplified before being digitized by the PowerLab. The digitized signal is transmitted to the computer using a fast USB connection. ADInstruments soft ware applications LabChart, LabTutor, LabStation and Lt receive, display, and record the data and your analysis to the computer’s hard disk.
- Page 10 The BNC socket labelled Signal Output on the back panel of the front-end provides the signal output to connect to an analog input socket on the front of the PowerLab. A BNC-to-BNC cable is supplied for this connection. If necessary, use a BNC to DIN smart adapter [MLAC22] to connect the BNC cable to your PowerLab’s input.
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Page 11: Special Cases
PowerLab I C output The number of normal front-ends that can be connected to a PowerLab depends on the number of analog input channels on the PowerLab. Each BNC cable from a front-end should be connected to one analog input channel on the PowerLab, for example, Input 1 on a /30 or /35 series PowerLab. - Page 12 Front-ends are designed for use with PowerLabs and ADInstruments programs such as LabChart, LabTutor, LabStation and Lt. The functions of the front-end are combined with those of the PowerLab, and are presented as a single set of soft ware controls in the ADInstruments program. Depending on the front-end(s) connected, front-end-specific dialogs replace the Input Amplifier dialogs or the Stimulator dialog.
- Page 13 To perform the self-test: • Turn on the PowerLab and check that it is working properly, as described in the owner’s guide that was supplied with it.
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Page 14: Preventing Problems
The highest available sampling rates are 100k /s or 200k /s, depending on your PowerLab. To view the frequencies present in your recorded signal open the Spectrum window in LabChart. For more information about Spectrum, see the LabChart Help Center. -
Page 15: Ground Loops
Similarly, if the high-pass filter was set too high, the amplitude of the T-wave sections may be reduced. The Input Amplifier... dialog allows you to examine ECGs and similar slowly changing waveforms to fine-tune filter settings before recording. Saturation Saturation occurs when the range is set too low for the signal being measured (the amplification, or gain, is too high). - Page 16 64 the mains filter introduces more noise than it removes. • you are recording at close to maximum sampling rates. The mains filter uses some of the PowerLab’s processing power and therefore reduces the maximum rate at which you can sample.
- Page 17 Owner’s Guide...
- Page 18 The FE116 GSR Amp is one of a family of modular devices called front-ends, designed to extend the capabilities of the PowerLab system. Each provides full electrical isolation. This chapter describes the basic features of the GSR Amp and discusses some aspects of its use.
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Page 19: The Front Panel
Input sockets The Status Indicator The status indicator light is at the bottom left of the front panel. When an ADInstruments program opens, the status indicator flashes briefly and then remains green, indicating that the program has found the front-end, checked and selected it, and it is ready for use. -
Page 20: The Back Panel
The Signal Output Socket The BNC socket labelled Signal Output on the back panel provides the signal output to connect to an analog input socket on the front of the PowerLab. A BNC-to-BNC cable is supplied for this connection. Connecting to the PowerLab To connect a front-end, such as your GSR Amp, to the PowerLab, first ensure that the PowerLab is turned off . - Page 21 (positive) input channels on the PowerLab, since each BNC cable from a front-end is connected to one of the analog inputs on the PowerLab. Only one front-end such as a Stimulus Isolator can be connected to the (positive) output of the PowerLab.
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Page 22: Signal Display
The GSR Amp dialog allows soft ware control of the combined options from the circuitry of the PowerLab and GSR Amp. The signal present at a channel’s input is displayed so you can see the eff ects of changing the settings. The GSR Amp is pre-calibrated and measures skin conductivity directly in µS (microsiemens). -
Page 23: Setting The Range
area. It functions the same as the Amplitude axis of the Chart window, and any change is applied to the Chart window. Figure 3–5 Amplitude axis Signal amplitude Range pop-up menu The GSR Amp dialog for Macintosh (also before zeroing) Compression buttons Pause/Scroll button Setting the Range... - Page 24 conductivity value is shown when everything is zeroed. Normal baseline conductivity values should be in the range of 10 to 50 µS, depending on the individual and the air humidity level (which aff ects skin conductivity). A scale measuring the change in conductivity (also in µS) is used for the final record.
- Page 25 second subject zero before commencing measurement. The galvanic skin response to a stimulus or series of stimuli can then be measured, relative to the baseline conductivity. Figure 3–6 To GSR Amp Connecting the electrodes to the subject: the GSR Amp uses AC excitation, so the polarity of the connections is...
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Page 26: Technical Aspects
PowerLab system. Each requires connection to the PowerLab via a special communications connector called the I C (eye-squared-sea) bus, and a BNC connector. The GSR Amp is essentially an extension of the PowerLab’s analog input. The GSR Amp provides: • full electrical isolation from power-line (mains) circuitry to guarantee subject safety •... -
Page 27: Troubleshooting
This section describes most of the common problems that can occur when using the GSR Amp with your PowerLab recording unit. If the solutions here do not work, earlier chapters, the LabChart Help Center, and the guide to your PowerLab may contain possible remedies. - Page 28 BNC cables from the GSR Amp must be connected to a positive input on the PowerLab. Make sure the input is the same channel from which you expect to use the front-end in the soft ware. Aft er checking connections, restart the PowerLab and application to see if this has fixed the problem.
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Page 29: Specifications
Zeroing and off set: Automatic soft ware-controlled fast zeroing, controlled by internal 12-bit DAC; resolution = ± 0.2 µS Output Signal: ± 2.0 V full scale: suitable for PowerLab Control Port C port: Provides control and power. Interface communications rate of ~50 kbits/s. -
Page 30: Physical Configuration
55 mm × 120 mm × 260 mm (2.2" × 4.7" × 10.2") Weight: 1.2 kg (2 lb 10 oz) Power requirements: 2.5 W max Operating conditions: 5–35 °C 0–90% humidity (non-condensing) ADInstruments reserves the right to alter these specifications at any time. Owner’s Guide... -
Page 31: Warranty
(5) years from the date of purchase. Other PowerLab Data Acquisition Units3, Front-ends4 and Pods5 shall be free of defects in material and workmanship for three (3) years from their date of purchase. ADI also warrants that ADI Specialized Data Recorders6 and Instruments7 shall be free of defects in material and workmanship for one (1) year from their date of purchase. -
Page 32: General Limitations
Product Types & Warranty Term ADI manufactured products covered by a five (5) year warranty Data Acquisition Units: PowerLab 35 series with PL prefix Front-ends: ADI Front-end Signal Conditioners with FE prefix. ADI manufactured products covered by three (3) year warranty Data Acquisition Units: PowerLab 26 series with ML prefix Front-ends: ADI Front-end Signal Conditioners with ML prefix. -
Page 33: Controlling Law And Severability
sale, installation service or use of its products. EXCEPT FOR THE EXPRESS WARRANTY SET FORTH HEREIN, THE SOLUTION AS WELL AS ALL EQUIPMENT AND SOFTWARE PROVIDED HEREUNDER ARE PROVIDED “AS IS” AND ADI MAKES NO WARRANTY. AS TO ITS USE OR PERFORMANCE. EXCEPT FOR ANY WARRANTY, CONDITION, REPRESENTATION OR TERM THE EXTENT TO WHICH CANNOT BE EXCLUDED OR LIMITED BY APPLICABLE LAW, ADI AND ITS SUPPLIERS MAKE NO WARRANTY, CONDITION, REPRESENTATION, OR TERM (EXPRESS OR IMPLIED, WHETHER BY STATUTE, COMMON LAW, CUSTOM, USAGE OR... -
Page 34: Technical Support
Server and LabTutor Online are trademarks of ADInstruments Pty Ltd. The names of specific recording units, such as PowerLab 16/35, are trademarks of ADInstruments Pty Ltd. Windows 8, Windows 7, Windows Vista and .NET Framework are trademarks of Microsoft Corporation. Apple, the Apple logo, MacOS, and Macintosh are trademarks of Apple Computer Inc.
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