VETSCAN UA USER’S MANUAL
|
9
How the VETSCAN UA Works
The UA analyzer is composed of optical-electronic sensor system, mechanism and I/V converter
(Fig. 4)
The optical-electronic sensor system consists of a light source and a light receptor. The light
from the light source falls on the reagent pads on the strip. The absorbance and reflectance vary
with the color development of reagent pad. The degree of color development is proportional
to the concentration of analyte in the urine. If the color of reagent pad is darker, more light is
absorbed and less light is reflected, and vice versa.
The reflected light is transmitted into the optical-electronic sensor system where the optical
signals are transformed into electric signals. Then, the electric signals are transformed by I/V
converter, then processed by CPU.
Optical-electronic sensor system
Lamp
Sample/Test Strip
CPU
Power
Printer
I/V Converter
Photoelectric cell
Display
Strip Tray/Carriage
Fig. 4