3700 Sagamore Parkway North . PO Box 5729 . Lafayette, IN 47903 USA . Ph: 765-423-1505 Fax: 765-423-4111 . www.lafayetteinstrument.com . E-mail: [email protected]
3700 Sagamore Parkway North . PO Box 5729 . Lafayette, IN 47903 USA . Ph: 765-423-1505 Fax: 765-423-4111 . www.lafayetteinstrument.com . E-mail: [email protected]
Model 76604US User’s Manual
3
Examiners should begin each examination with an acquaintance test to ensure that the pulse wave is recorded at the proper
amplitude (about 3/4 inch) and that the tracing is not erratic. Some adjustment and experimentation may be required to
find the optimal recording site on the hand. The sensor is sensitive to movement, therefore examinees must keep their
hands still during testing. It is recommended that, after every use, the sensor be cleaned with a clean dry cotton cloth by
gently wiping the inside (Handler, Mark & Kraphol, Donald 2007).
Note:
Unlike the cardio, the trace for the PLE will not show a rise for deception, but rather a compression.
Chart with plethysmograph and electrodermal sensor tracing displayed simultaneously.
References:
Handler, Mark and Kraphol, Donald., The Use and Benefits of the Photoelectric Plethysmograph in
Polygraph Testing (2007, APA Journal
