UFi 1020 User manual

MODEL 1020 INFRARED PULSE
PLETHYSMOGRAPH
545 Main Street, Suite C-2
Morro Bay, CA 93442
805-772-1203

Introduction
The Model 1020 infrared plethysmograph monitors
pulsatile blood flow changes in fingers, toes, ear,
forehead, and other locations. You attach the Model 1020
with the supplied Velcro™ strap or with electrode-type
adhesive collars.
The Model 1020 will record through the finger nail, and
in the direct coupled mode, it can even measure blood
flow changes due to blushing! Matched optics reduce the
effects of ambient light and subject motion to improve
signal output.
Applications for the Model 1020
To monitor finger pulse with standard model:
Attach Model 1020 firmly but not tightly to the
end of a finger with supplied Velcro™ strap;
Loosen strap if it feels tight to subject, or if finger
becomes pale or begins turning blue.
Touch subject's fingers to your cheek. If they feel
cold the vasculature is probably constricted and
output from Model 1020 transducer will be very
low. Loosen the Velcro™ strip to restore an
adequate signal as shown below.

To measure pulse in other areas, standard model:
Use longer strip of Velcro™ or lightly wrap an
elastic bandage around Model 1020 and the body
part.
Model 1020 may also be attached with Model
1080B or other double-sided adhesive disc.
The forehead directly over center of eyebrow, is
an excellent place to sense pulse:

To monitor pulse with Model 1020FC:
clip to finger as shown below, then move around
to obtain best signal.
[replace with better picture]
To monitor pulse with Model 1020EC:
clip to ear lobe as shown below, then move
around to obtain best signal.

Application circuits
Basic power and output wiring:
.
430 ohms
GROUND
(SHIELD)
_EXCITATION (WHITE)
.
PHOTOSENSOR
. .
.
MODEL 1020
OUTPUT
(BLACK)
+
GROUND
(SHIELD)
9VBATTERY
.
.
.
.
LED
To monitor pulse:
add a 1 microfarad (1 μF) capacitor in series with
Model 1020 black output lead, as shown below:
WHITE
_
SHIELD
9VBATTERY
.
.
.
SHIELD
.
.
+
TO 1
MEGOHM
AMPLIFIER
INPUT
.
BLACK .
+
1 uF
MODEL 1020
The pulse "rides" on slowly varying DC level:

To monitor only changes in DC level:
add a 10 microfarad (10 μF) capacitor in series with
Model 1020 black output lead, as shown below:
+
.
. .
SHIELD
MODEL 1020
9VBATTERY
.
.
SHIELD
BLACK
_.
+
10 uF
WHITE TO 1
MEGOHM
AMPLIFIER
INPUT
.
One minute trace shows how pulsatile signal varies
with respiration:
To monitor absolute DC level:
add a 100K pot as shown below and connect circuit
output to recorder differential input:
+100K 10-TRN
.
9VBATTERY
.
.TO RECORDER
DIFFERENTIAL
INPUTS
.SHIELD REFERENCE[M?]
_BLACK .
MODEL 1020 .
SHIELD
.
.
WHITE
One minute trace shows how pulsatile signal varies
with respiration:

Specifications
Signal output
5-50 mV typical when applied to
finger pulse of resting subject
Output impedance
1 KΩ nominal
Excitation
20 mA at 6-9 VDC, nominal
Emitter/Detector Wavelength
950 nM
Size
15mm x 15mm x 6mm
(0.6" x 0.6" x 0.25”)
Weight
About 28g (1 ounce)
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,
installed at variance with factory-designated procedures, has been
subjected to negligence, misuse, or accident beyond normal
usage, or has had the serial number altered, defaced, or removed.
UFI instruments and transducers are subject to continuous
improvement. We reserve the right to modify any design or
specification without notice and without incurring any obligation.
Non-warranty repairs of transducers are performed at a fixed
price. Contact us or visit our website at
www.ufiservingscience.com/warranty for current pricing.
All questions regarding the warranty should be directed to:
UFI
Customer Service Department
545 Main Street, Suite C-2
Morro Bay, CA 93442
805-772-1203
Email: [e-mail]
When communicating with UFI concerning your equipment,
please include the model and serial numbers.