Nellcor N-200 Operator's Manual page 48

Guide to Operation
• To print the trend memory, press the TREND button. Data
is printed at the rate of approximately 1 hour of data per
minute. If prior to printing the trend memory, the strip-
chart recorder was printing real-time data, the beginning
and end of the trend data are identified by zero-voltage
outputs.
• The trend output can be stopped at any time by again
pressing the TREND button. To restart it, push the
TREND button again—if less than 30 seconds have
elapsed, the output continues from the point at which it
was stopped; if more than 30 seconds have elapsed, the
output starts again at the beginning.
The following automatic markers appear on the trend graphs
printed by an analog strip-chart recorder:
Occurrence
Beginning of trend output
End of trend output
Time when signal is acquired
Time when pulse signal is
lost
Time when N-200 is turned
off
Event-limit or user-defined
event
Note: The monitor can only store 60 events; if more than 60
occur, only the last 60 will be retained.
42
Marker
A 1-second, zero-voltage
output followed by two full-
scale deflections
A 2-second, zero-voltage
output
A full-scale to current-value
deflection
A full-scale to current-value
deflection
A full-scale to current-value
deflection
A full-scale to zero-voltage
deflection