Siemens RAPIDLAB 248, Operator'S Manual, Page: 86 / 135

Sample Flow Routine
This routine checks the sample pathway from probe to waste bottle. It
also checks the fluid detectors.
1. From Ready (or Not Ready ) press # for menu and 3 for
Troubleshooting . From Troubleshooting press 2 for Sample Flow .
2. Lift the probe lever.
3. Present a test sample (for example, a QC sample). To start the
sampling press and hold
#
.
4. Watch the sample as it goes through the pre-heater. When the
sample reaches the first fluid detector check that the FD1 box on
the display changes from empty to solid.
Figure 4-4. Location of Fluid Detectors
5. Watch the sample as it goes through the measurement block. When
the sample reaches the second fluid detector check that the FD2 box
on the display changes from empty to solid.
6. Continue pressing # and remove the sample from the probe. Watch
the trailing edge of the sample as it goes through the pre-heater.
7. When the trailing edge of the sample reaches the first fluid detector
check that the FD1 box on the display changes from solid to empty.
8. Watch the trailing edge as it goes through the measurement block.
When it reaches the second fluid detector check that the FD2 box on
the display changes from solid to empty.
9. By presenting and removing the sample you can repeat the test.
10. Press * to cancel the test.
11. If either of the fluid detectors fail the test replace them following
the instructions on the packaging.
FD 1
FD 2
Page 4-12 248 Operator’s Manual
→ Troubleshooting → Sample Flow
press * to Exit
Lift probe to test
sample flow