Bayer HealthCare RapidPoint 400 Series, Service Manual, Page: 429 / 458

Rev. C About Rapidpoint 400 Series Calibrations 429
The system also performs this sequence under certain conditions such as
the detection of interfering substances. If benzalkonium is detected by a
shift greater than 1.1 mV in the bwash
of the Na sensor or if the mixed-
venous button is chosen, the system goes into Retrocal Benzalkonium
Correction mode. To exit this retrocal mode, the Na and K sensors must
have a drift less than or equal to the normal drift limit during the retrocal
following the sample, or there must be no drifts detected during any two
consecutive scheduled calibrations.
Samples that are not in retrospective calibration (retrocal) mode have
results posted in 1 minute and the complete cycle from sample loading until
the wash is complete takes 2 minutes.
Calibration Schedule
After the initialization (init) period calibrations are scheduled as follows:
• 1-point every 30 minutes
• 2-point every 2 hours
• full 2-point every 8 hours
Interruptible and Uninterruptible Calibrations
All scheduled calibrations are either interruptible or uninterruptible. During
a calibration, the system alerts the operator by posting a yellow dialogue
box, with a countdown clock that states the system is busy on the analysis
screen.
• Interruptible calibration
A yellow dialogue box contains a STAT button next to the countdown
clock. This STAT button is pushed to interrupt or stop the calibration
causing the system to immediately wash out the calibrators. If an
interruptible cal enters the wash out sequence, then the STAT button
disappears because there is no faster way to interrupt or stop the
calibration.