Roche URISYS 2400, Operator'S Manual, Page: 18 / 166

Roche Diagnostics
A-2 Operator’s Manual · Version 1.0
1 Introduction to the system URISYS 2400
Description of the URISYS 2400 analyzer
Description of the URISYS 2400 analyzer
The URISYS 2400 analyzer is a fully automated urinalysis system intended for
in vitro qualitative or semi-quantitative determination of urine analytes,
including pH, leukocytes, nitrite, protein, glucose, ketones, urobilinogen,
bilirubin, and erythrocytes. In addition, the analyzer determines specific
gravity, color, and clarity. The URISYS 2400 is intended for professional use
only.
The primary functions of the URISYS 2400 analyzer include:
o
Sample identification
o
Automatic dispensing of test strips
o
Robotic pipetting of samples
o
Controlled incubation period
o
Photometric measurements
o
Result memory
o
Optional formats for data output
The URISYS 2400 analyzer uses the URISYS 2400 cassette containing 400 test
strips. Each test strip has ten individual test pads that are used to test for
different substances or characteristics. The test strips are analyzed as they
move automatically through the analyzer. One strip is used per sample. When
a strip is dispensed for use, an aliquot of the urine sample is pipetted onto
each of the test pads. The test results are based on the measurement of
reflected light intensity. The specific gravity, color, and clarity of each sample
are also measured.
Measuring principle
The URISYS 2400 is a fully automated reflectance photometer for in vitro
semi-quantitative measurements of urine test strips. The light sources (LED’s
[light-emitting diodes]) and reading times are optimized for the reaction
chemistry and color development that occur on the test pads.
The measuring head of the URISYS 2400 contains LED’s of three different
wavelengths. The test strip remains stationary at the measuring position as the
measuring head moves over each test pad. Measurement starts at the reference
plate, which is used to test the optical system.
The URISYS 2400 verifies that the test strip is properly positioned under the
measuring head, by measuring the reflected light. If a test strip is not properly
positioned under the measuring head, the URISYS 2400 displays a message.