UFi 1010 Quick Start Manual

PULSE TRANSDUCER UFI 545 Main Street, Suite C-2 Morro Bay, CA 93442 2 Introduction Piezo-electric transducers convert physical activity such as changes in force or pressure into an electrical signal. The Model 1010 transducer is a piezo-electric transducer designed for wide ranging applications in the life sciences. These applications include: • sensing and recording peripheral pulse in the finger; • measuring carotid pulse; • recording throat excursions from swallowing; • monitoring Korotkoff sounds; • monitoring heart sounds; • use as a small-animal pulse and respiration transducer; • monitoring vibrations; an ...

instrument. However, it may be damaged unless the following cautions are observed: • Do not expose Model 1010 to temperatures above 50o C (122 o F). • Do not use an ohmmeter to measure resistance of Model 1010. • Do not apply DC voltages to Model 1010. These can impose large stresses that can bend diaphragm or fracture piezo element. • Model 1010 can produce output pulses of several volts during handling and placement. If connected equipment cannot handle such inputs, Model 1010 should be disconnected from downstream equipment until it has been attached to subject. Connection considera ...

output should be at least 100-200 mV. • Peripheral vasoconstriction, often due to a cold subject or room, can cut the signal greatly. Touch subject's fingers to your cheek -- coldness indicates vasoconstriction. • Model 1010 finger pulse signal differs from usual pressure pulse signal due to poor low- frequency response of transducer piezo- electric element. Use a charge amplifier circuit (see below) to correct response and obtain a good pressure pulse waveform. 10K To Model 1010 1M 22M To signal conditioner + - U2 LF411 3 2 6 7 4 V+ V- 47 nF . . 6 To measure carotid pulse: • place Model 1010 ...

• Signal output Varies with force: typical finger pulse yields 20-40 mV, but can exceed 500 mV • Weight 14 grams (0.5 ounce) • Size 23mm dia x 13mm high (0.9" dia x 0.5" high) • Cable length 1.8m (6 feet) nominal; others by special order Warranty and repair All UFI instruments are warranted against defects in materials and workmanship to the original purchaser for a period of one year from the date of original purchase. This warranty is void if our inspection shows the equipment has been tampered with; or installed at variance with factory-designated procedures; or has been subjected to ...