APPENDIX F
FLOW CHART OF INSTRUMENT OPERATION
Display
self-check error
Perform self-check
Error
Ask for magnetic card
and read card
User actions:
Insert cuvette to start
measurement or
read a new magnetic card
Instrument OK
Ask user to add reagent
and to remove cuvette
Display
shaking rate
Ask user to reinsert
cuvette into measure-
ment well
Measure reaction
Calculate result and
send it to display and
serial port
Wait for
cuvette removal
Switch on
instrument
Start-up tests
Magnetic card
read correctly
Yes
If read correctly, parameters changed
Cuvette
inserted in
measurement
No
well?
Yes
Error
Measure blank
Cuvette inserted
too early
Cuvette inserted
too late
Error
15
Display error
message
No
Read new
magnetic card
Cancel test and display
error messages