Iris Diagnostics, a Division of Iris International, Inc.
iQ
®
200 Sprint™ (2G) Automated Urine Microscopy Analyzer Service Manual 300-4949 Rev A 01/2005 3-6
3. Components
Specimen Presentation Assembly # 700-3700
The SPA or “Specimen Presentation Assembly,” is associated with the
“front end” handling of the urine. Mechanically, the SPA mixes the
specimen within the sample tube for uniform particle distribution,
aspirates sample from the test tube, and delivers it to the next process in
the Microscopy Module. The pipette (a vertical two-lumen tube) is
mounted onto a two-axis arm, and provides the means for positioning the
pipette down into the sample tube. The SPA includes two DC motors with
integral encoders—one for vertical translation of the pipette arm, and one
for rotation of the pipette arm.
Crash Detect Function
The Crash Detect function senses one switch (of a pair of snap-action
switches mounted on the SPA arm itself). A latched relay on the SPA
SIC is held pulled-in until the Hard Crash switch on the SPA arm opens
(due to a crash), the relay drops out, and drive to the vertical motor is
interrupted. When the relay is pulled in, the green “Vert OK” LED is on.
When the relay is dropped out, the red “Vert Crash” LED is on. At
Microscopy Module power-up, the Hard Crash condition is automatically
reset by an alternate signal on the SPA SIC. There is a push-button
switch on the SPA SIC to manually reset the Hard Crash condition if the
incoming Hard Crash signal (from the Hard Crash switch on the SPA arm)
is no longer asserted. Under normal conditions, the manual switch is not
used. Even when the vertical motor is disabled by the crash relay
dropping out, the SPA SIC will still allow upward vertical motion of the
SPA arm, but not downward motion.
Pi
ette
To
board
Rotation motor
Vertical motor
Belt
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