BSL PRO 4 Manual - Biopac

108 BSL PRO ManualCalibration TabUse CalibrationRequire calibration priorto acquiring dataCalibration TypePromptExplanationCalibration procedure is applied after clicking the “Calibration’ icon in the graphchannel’s vertical scale region. One (if single point) or two (if double point) customprompts are presented in place of the usual ‘Scaling analog channel” dialog. Eachprompt has a ‘Calibrate’ and “Cancel’ button, one of which must be responded to inorder to continue.The above procedure is applied, except calibration prompts are presented as followswhen the ‘Start’ button is clicked. Append mode: Calibration required at start of first segment recording only. Save once or Autosave mode: Calibration required at start of each recording.Specifies calibration option to be performed. Two types are available: Single point – Useful for quickly zeroing the baseline offset or establishing apreload offset value. Presents a single prompt to the user. Upon click of“Calibrate”, the input voltage is set as the new “Cal2 Input voltage” in theScaling dialog (equivalent to clicking “Cal2”). It then calculates the differencebetween the old and new Cal2 Input values then adds this to the Cal1 Inputvalue. In other words, it preserves the Scaling’s slope while shifting the offset. Double point – records two independent voltages in a sequence of twoprompts and records the first as the input voltage for Cal2 and the second forthe input voltage in Cal1For more details see examples belowUse to input “custom” calibration prompt text. Up to 500 characters can be entered andcarriage returns can be used. The resulting prompts will be dynamically sizedaccording to the amount of text entered.Note: The Scaling dialogs “map values” are displayed for reference to the left of thePrompt field and can only be modified in the Scaling dialog. Any changes will bedynamically updated in the Calibration dialog.Examples of how to use the Calibration optionExample of “Double point” calibration for the SS12LA Force Transducer:1. Connect the SS12LA to the MPs CH 1 input and choose MP > Set Up Channels.2. Select “Force 0-50 grams” from the Preset pull-down menu then click “Setup”.3. From the “Input Channel Parameters” dialog, click “Advanced” then click on the“Calibration” tab.4. Check “Use calibration”, “Require calibration prior to acquiring data” and choose“Double point” as the Calibration type.5. Enter the desired “First prompt” text. For example,“With only “S” hook attached to transducer, click “Calibrate”.6. Enter the desired “Second prompt” text. For example,“Attach 50 grams of weight, wait until swinging motion stops, then click “Calibrate”.7. Click OK and exit the “Input Channel Parameters” dialog.8. Click the Start button. The first prompt will appear:Visit the online support center at www.biopac.com