Limit Events - Nellcor N-200 Operator's Manual

Guide to Operation
Turn the control knob until the desired number of minutes
appears. Then release the buttons.
To end a user-defined event prematurely, press and hold the
HIGH RATE and AUDIO ALARM OFF buttons, and turn the
control knob to the left until UdE OFF appears. Then release
the buttons.

Limit Events

Setting the Limits that Trigger an Event-Limit
Normally, the established alarm limits determine when a limit
event occurs (that is, data is stored in the event memory
whenever the saturation or pulse rate falls outside the alarm
limits).
To set event limits that differ from the alarm limits, the N-200
must be operating on AC power. Press and hold the applicable
alarm button (HIGH SAT, LOW SAT, HIGH RATE, or LOW
RATE) and the rear-panel EVENT button; while continuing to
press and hold the buttons, turn the control knob until the
desired setting appears in the display. The saturation event
limits may be set for any value from 20% to 100%, and the
pulse rate event limits may be set for any value from 20 to
250beats per minute.
To make an event limit equal to the alarm limit again, while
the N-200 is operating on AC power, press and hold the
applicable alarm button and the EVENT button, and at the
same time, turn the control knob to the right until = AL
appears in the display.
When the N-200 is turned off and back on again, the event
limits are reset to the alarm-limit values.
Printing Event Data: Data in the event memory may be
printed graphically on a ThinkJet printer with an RS-232
serial interface (model 2225D) or a strip-chart recorder, as
described in this section. To print the contents of the event
memory, the N-200 must be operating on AC power. The N-200
continues to function as a monitor while the event data is being
printed. The data is retained in memory after printing, unless
they are erased as described at the end of this section.
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