ITC HEMOCHRON Jr. Signature, Service Manual

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6.2.4 If an error message is displayed, remove the test cuvette and examine the
sample and waste channels. Verify that the waste channel has sample travel
that is approximately 75% of the distance between the reservoir and the other
end of the cuvette. Also verify that the sample channel contains a sample
segment that is approximately one inch long.
If either channel is not filled, the corresponding motors or pumps should be
replaced per sections 7.0, 8.3, 8.4, 8.5, 9.0 and 10.0, if inspection of the hoses and
seals reveals no leakage.
6.3 Check Switch Keypad (Overlay)
Check the switch keypad by exercising all switches and monitoring for the correct
display. For this test you will need an unused test cuvette.
See
Figure 1 . This procedure is not applicable to Jr.II
Procedure:
6.3.1 Insert the test cuvette with the blood reservoir facing up.
6.3.2 Press “ID” then “1” and then “1” (PID).
6.3.3 Enter “0” through “9” via key switches and verify the entry via the display.
Press CANCEL.
6.3.4 Press the “QC” button and the display will indicate “QC SELECTS”, then
press the “CANCEL” button to cancel entry.
6.3.5 Press the “DATA BASE” button and the display will indicate “DB SELECTS”,
then press the “CANCEL” button to cancel entry.
If any of the key switches/buttons are intermittently or permanently non-functional
remove and replace the Keypad Overlay/Top Cover Assembly per sections 7.1, 9.0
and 10.0
HEMOCHRON ® Jr. Signature Service Manual 8